feat: Chat request implementation

In this patch, I have implemented the chat request and response from OTMP
protocol. The changes include:
- New `in_chat_request` and `out_chat_request` database tables
- New `users_status` table to store user status (whitelisted or blacklisted)
- New server events:
    - `ChatRequest` To send chat request comes from some user
    - `ChatRequestResponse` To send chat request response to some user
- New client events:
    - `ChatRequest` To send chat request to some user
    - `ChatRequestResponse` To send chat request response to some user
- `ws_errors` macro to create websocket errors
- `/user/whitelist` and `/user/blacklist` API to list whitelisted and
blacklisted users

Fixes: #2
Reviewed-on: #14
Reviewed-by: Amjad Alsharafi <me@amjad.alsharafi.dev>
Helped-by: Amjad Alsharafi <me@amjad.alsharafi.dev>
Signed-off-by: Awiteb <a@4rs.nl>

Cargo.lock

@@ -1965,6 +1965,7 @@ dependencies = [
 name = "oxidetalis_entities"
 version = "0.1.0"
 dependencies = [
+ "chrono",
  "sea-orm",
 ]
 

crates/oxidetalis/src/database/in_chat_requests.rs

@@ -0,0 +1,61 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! Database extension for the `in_chat_requests` table.
+
+use chrono::Utc;
+use oxidetalis_core::types::PublicKey;
+use oxidetalis_entities::prelude::*;
+use sea_orm::{sea_query::OnConflict, DatabaseConnection};
+
+use crate::errors::ServerResult;
+
+/// Extension trait for the `in_chat_requests` table.
+pub trait InChatRequestsExt {
+    /// Save the chat request in the recipient table
+    async fn save_in_chat_request(
+        &self,
+        requester: &PublicKey,
+        recipient: &UserModel,
+    ) -> ServerResult<()>;
+}
+
+impl InChatRequestsExt for DatabaseConnection {
+    #[logcall::logcall]
+    async fn save_in_chat_request(
+        &self,
+        sender: &PublicKey,
+        recipient: &UserModel,
+    ) -> ServerResult<()> {
+        InChatRequestsEntity::insert(InChatRequestsActiveModel {
+            recipient_id: Set(recipient.id),
+            sender: Set(sender.to_string()),
+            in_on: Set(Utc::now()),
+            ..Default::default()
+        })
+        .on_conflict(
+            OnConflict::columns([
+                InChatRequestsColumn::RecipientId,
+                InChatRequestsColumn::Sender,
+            ])
+            .do_nothing()
+            .to_owned(),
+        )
+        .exec(self)
+        .await?;
+        Ok(())
+    }
+}

crates/oxidetalis/src/database/mod.rs

@@ -16,6 +16,12 @@
 
 //! Database utilities for the OxideTalis homeserver.
 
+mod in_chat_requests;
+mod out_chat_requests;
 mod user;
+mod user_status;
 
+pub use in_chat_requests::*;
+pub use out_chat_requests::*;
 pub use user::*;
+pub use user_status::*;

crates/oxidetalis/src/database/out_chat_requests.rs

@@ -0,0 +1,102 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! Database extension for the `out_chat_requests` table.
+
+use chrono::Utc;
+use oxidetalis_core::types::PublicKey;
+use oxidetalis_entities::prelude::*;
+use sea_orm::DatabaseConnection;
+
+use crate::{errors::ServerResult, websocket::errors::WsError};
+
+/// Extension trait for the `out_chat_requests` table.
+pub trait OutChatRequestsExt {
+    /// Returns the outgoing chat request if the `user` have a sent chat request
+    /// to the `recipient`
+    async fn get_chat_request_to(
+        &self,
+        requester: &UserModel,
+        recipient: &PublicKey,
+    ) -> ServerResult<Option<OutChatRequestsModel>>;
+
+    /// Save the chat request in the requester table
+    async fn save_out_chat_request(
+        &self,
+        requester: &UserModel,
+        recipient: &PublicKey,
+    ) -> ServerResult<()>;
+
+    /// Remove the chat request from requester table
+    async fn remove_out_chat_request(
+        &self,
+        requester: &UserModel,
+        recipient: &PublicKey,
+    ) -> ServerResult<()>;
+}
+
+impl OutChatRequestsExt for DatabaseConnection {
+    #[logcall::logcall]
+    async fn get_chat_request_to(
+        &self,
+        requester: &UserModel,
+        recipient: &PublicKey,
+    ) -> ServerResult<Option<OutChatRequestsModel>> {
+        requester
+            .find_related(OutChatRequestsEntity)
+            .filter(OutChatRequestsColumn::Recipient.eq(recipient.to_string()))
+            .one(self)
+            .await
+            .map_err(Into::into)
+    }
+
+    #[logcall::logcall]
+    async fn save_out_chat_request(
+        &self,
+        requester: &UserModel,
+        recipient: &PublicKey,
+    ) -> ServerResult<()> {
+        if let Err(err) = (OutChatRequestsActiveModel {
+            sender_id: Set(requester.id),
+            recipient: Set(recipient.to_string()),
+            out_on: Set(Utc::now()),
+            ..Default::default()
+        }
+        .save(self)
+        .await)
+        {
+            match err.sql_err() {
+                Some(SqlErr::UniqueConstraintViolation(_)) => {
+                    return Err(WsError::AlreadySendChatRequest.into());
+                }
+                _ => return Err(err.into()),
+            }
+        }
+
+        Ok(())
+    }
+
+    async fn remove_out_chat_request(
+        &self,
+        requester: &UserModel,
+        recipient: &PublicKey,
+    ) -> ServerResult<()> {
+        if let Some(out_model) = self.get_chat_request_to(requester, recipient).await? {
+            out_model.delete(self).await?;
+        }
+        Ok(())
+    }
+}

crates/oxidetalis/src/database/user.rs

@@ -21,27 +21,29 @@ use oxidetalis_core::types::PublicKey;
 use oxidetalis_entities::prelude::*;
 use sea_orm::DatabaseConnection;
 
-use crate::errors::{ApiError, ApiResult};
+use crate::{errors::ServerResult, routes::ApiError};
 
 pub trait UserTableExt {
     /// Returns true if there is users in the database
-    async fn users_exists_in_database(&self) -> ApiResult<bool>;
+    async fn users_exists_in_database(&self) -> ServerResult<bool>;
     /// Register new user
-    async fn register_user(&self, public_key: &PublicKey, is_admin: bool) -> ApiResult<()>;
+    async fn register_user(&self, public_key: &PublicKey, is_admin: bool) -> ServerResult<()>;
+    /// Returns user by its public key
+    async fn get_user_by_pubk(&self, public_key: &PublicKey) -> ServerResult<Option<UserModel>>;
 }
 
 impl UserTableExt for DatabaseConnection {
     #[logcall]
-    async fn users_exists_in_database(&self) -> ApiResult<bool> {
+    async fn users_exists_in_database(&self) -> ServerResult<bool> {
         UserEntity::find()
             .one(self)
             .await
-            .map_err(Into::into)
             .map(|u| u.is_some())
+            .map_err(Into::into)
     }
 
     #[logcall]
-    async fn register_user(&self, public_key: &PublicKey, is_admin: bool) -> ApiResult<()> {
+    async fn register_user(&self, public_key: &PublicKey, is_admin: bool) -> ServerResult<()> {
         if let Err(err) = (UserActiveModel {
             public_key: Set(public_key.to_string()),
             is_admin: Set(is_admin),
@@ -51,10 +53,19 @@ impl UserTableExt for DatabaseConnection {
         .await
         {
             if let Some(SqlErr::UniqueConstraintViolation(_)) = err.sql_err() {
-                return Err(ApiError::DuplicatedUser);
+                return Err(ApiError::AlreadyRegistered.into());
             }
         }
 
         Ok(())
     }
+
+    #[logcall]
+    async fn get_user_by_pubk(&self, public_key: &PublicKey) -> ServerResult<Option<UserModel>> {
+        UserEntity::find()
+            .filter(UserColumn::PublicKey.eq(public_key.to_string()))
+            .one(self)
+            .await
+            .map_err(Into::into)
+    }
 }

crates/oxidetalis/src/database/user_status.rs

@@ -0,0 +1,306 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! Database extension to work with the whitelist table
+
+use std::num::{NonZeroU32, NonZeroU8};
+
+use chrono::Utc;
+use oxidetalis_core::types::PublicKey;
+use oxidetalis_entities::prelude::*;
+use sea_orm::DatabaseConnection;
+
+use crate::{errors::ServerResult, websocket::errors::WsError};
+
+/// Extension trait for the `DatabaseConnection` to work with the whitelist
+/// table
+pub trait UsersStatusExt {
+    /// Returns true if the `whitelister` has whitelisted the
+    /// `target_public_key`
+    async fn is_whitelisted(
+        &self,
+        whitelister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<bool>;
+
+    /// Returns true if the `blacklister` has blacklisted the
+    /// `target_public_key`
+    async fn is_blacklisted(
+        &self,
+        blacklister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<bool>;
+
+    /// Add the `target_public_key` to the whitelist of the `whitelister` and
+    /// remove it from the blacklist table (if it's there)
+    async fn add_to_whitelist(
+        &self,
+        whitelister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()>;
+
+    /// Add the `target_public_key` to the blacklist of the `blacklister` and
+    /// remove it from the whitelist table (if it's there)
+    async fn add_to_blacklist(
+        &self,
+        blacklister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()>;
+
+    /// Remove the target from whitelist table
+    // FIXME(awiteb): This method will be used when I work on decentralization, So, I'm keeping it
+    // for now
+    #[allow(dead_code)]
+    async fn remove_from_whitelist(
+        &self,
+        whitelister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()>;
+
+    /// Remove the target from blacklist table
+    // FIXME(awiteb): This method will be used when I work on decentralization, So, I'm keeping it
+    // for now
+    #[allow(dead_code)]
+    async fn remove_from_blacklist(
+        &self,
+        blacklister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()>;
+
+    /// Returns the whitelist of the user
+    async fn user_whitelist(
+        &self,
+        whitelister: &UserModel,
+        page: NonZeroU32,
+        page_size: NonZeroU8,
+    ) -> ServerResult<Vec<UsersStatusModel>>;
+
+    /// Returns the blacklist of the user
+    async fn user_blacklist(
+        &self,
+        blacklister: &UserModel,
+        page: NonZeroU32,
+        page_size: NonZeroU8,
+    ) -> ServerResult<Vec<UsersStatusModel>>;
+}
+
+impl UsersStatusExt for DatabaseConnection {
+    #[logcall::logcall]
+    async fn is_whitelisted(
+        &self,
+        whitelister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<bool> {
+        get_user_status(
+            self,
+            whitelister,
+            target_public_key,
+            AccessStatus::Whitelisted,
+        )
+        .await
+        .map(|u| u.is_some())
+        .map_err(Into::into)
+    }
+
+    #[logcall::logcall]
+    async fn is_blacklisted(
+        &self,
+        blacklister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<bool> {
+        get_user_status(
+            self,
+            blacklister,
+            target_public_key,
+            AccessStatus::Blacklisted,
+        )
+        .await
+        .map(|u| u.is_some())
+        .map_err(Into::into)
+    }
+
+    #[logcall::logcall]
+    async fn add_to_whitelist(
+        &self,
+        whitelister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()> {
+        if whitelister.public_key == target_public_key.to_string() {
+            return Err(WsError::CannotAddSelfToWhitelist.into());
+        }
+
+        if let Some(mut user) = get_user_status(
+            self,
+            whitelister,
+            target_public_key,
+            AccessStatus::Blacklisted,
+        )
+        .await?
+        .map(IntoActiveModel::into_active_model)
+        {
+            user.status = Set(AccessStatus::Whitelisted);
+            user.updated_at = Set(Utc::now());
+            user.update(self).await?;
+        } else if let Err(err) = (UsersStatusActiveModel {
+            user_id: Set(whitelister.id),
+            target: Set(target_public_key.to_string()),
+            status: Set(AccessStatus::Whitelisted),
+            updated_at: Set(Utc::now()),
+            ..Default::default()
+        }
+        .save(self)
+        .await)
+        {
+            match err.sql_err() {
+                Some(SqlErr::UniqueConstraintViolation(_)) => {
+                    return Err(WsError::AlreadyOnTheWhitelist.into());
+                }
+                _ => return Err(err.into()),
+            }
+        }
+
+        Ok(())
+    }
+
+    #[logcall::logcall]
+    async fn add_to_blacklist(
+        &self,
+        blacklister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()> {
+        if blacklister.public_key == target_public_key.to_string() {
+            return Err(WsError::CannotAddSelfToBlacklist.into());
+        }
+
+        if let Some(mut user) = get_user_status(
+            self,
+            blacklister,
+            target_public_key,
+            AccessStatus::Whitelisted,
+        )
+        .await?
+        .map(IntoActiveModel::into_active_model)
+        {
+            user.status = Set(AccessStatus::Blacklisted);
+            user.updated_at = Set(Utc::now());
+            user.update(self).await?;
+        } else if let Err(err) = (UsersStatusActiveModel {
+            user_id: Set(blacklister.id),
+            target: Set(target_public_key.to_string()),
+            status: Set(AccessStatus::Blacklisted),
+            updated_at: Set(Utc::now()),
+            ..Default::default()
+        }
+        .save(self)
+        .await)
+        {
+            match err.sql_err() {
+                Some(SqlErr::UniqueConstraintViolation(_)) => {
+                    return Err(WsError::AlreadyOnTheBlacklist.into());
+                }
+                _ => return Err(err.into()),
+            }
+        }
+
+        Ok(())
+    }
+
+    #[logcall::logcall]
+    async fn remove_from_whitelist(
+        &self,
+        whitelister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()> {
+        if let Some(target_user) = get_user_status(
+            self,
+            whitelister,
+            target_public_key,
+            AccessStatus::Whitelisted,
+        )
+        .await?
+        {
+            target_user.delete(self).await?;
+        }
+        Ok(())
+    }
+
+    #[logcall::logcall]
+    async fn remove_from_blacklist(
+        &self,
+        blacklister: &UserModel,
+        target_public_key: &PublicKey,
+    ) -> ServerResult<()> {
+        if let Some(target_user) = get_user_status(
+            self,
+            blacklister,
+            target_public_key,
+            AccessStatus::Blacklisted,
+        )
+        .await?
+        {
+            target_user.delete(self).await?;
+        }
+        Ok(())
+    }
+
+    async fn user_whitelist(
+        &self,
+        whitelister: &UserModel,
+        page: NonZeroU32,
+        page_size: NonZeroU8,
+    ) -> ServerResult<Vec<UsersStatusModel>> {
+        whitelister
+            .find_related(UsersStatusEntity)
+            .filter(UsersStatusColumn::Status.eq(AccessStatus::Whitelisted))
+            .paginate(self, u64::from(page_size.get()))
+            .fetch_page(u64::from(page.get() - 1))
+            .await
+            .map_err(Into::into)
+    }
+
+    async fn user_blacklist(
+        &self,
+        blacklister: &UserModel,
+        page: NonZeroU32,
+        page_size: NonZeroU8,
+    ) -> ServerResult<Vec<UsersStatusModel>> {
+        blacklister
+            .find_related(UsersStatusEntity)
+            .filter(UsersStatusColumn::Status.eq(AccessStatus::Blacklisted))
+            .paginate(self, u64::from(page_size.get()))
+            .fetch_page(u64::from(page.get() - 1))
+            .await
+            .map_err(Into::into)
+    }
+}
+
+/// Returns user from user_status table by the entered and target public key
+async fn get_user_status(
+    conn: &DatabaseConnection,
+    user: &UserModel,
+    target_public_key: &PublicKey,
+    status: AccessStatus,
+) -> ServerResult<Option<UsersStatusModel>> {
+    user.find_related(UsersStatusEntity)
+        .filter(
+            UsersStatusColumn::Target
+                .eq(target_public_key.to_string())
+                .and(UsersStatusColumn::Status.eq(status)),
+        )
+        .one(conn)
+        .await
+        .map_err(Into::into)
+}

crates/oxidetalis/src/errors.rs

@@ -14,24 +14,16 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
 
-use salvo::{
+use sea_orm::DbErr;
-    http::StatusCode,
-    oapi::{Components as OapiComponents, EndpointOutRegister, Operation as OapiOperation},
-    Response,
-    Scribe,
-};
 
-use crate::{routes::write_json_body, schemas::MessageSchema};
+use crate::{routes::ApiError, websocket::errors::WsError};
 
 /// Result type of the homeserver
-#[allow(clippy::absolute_paths)]
+pub(crate) type ServerResult<T> = Result<T, ServerError>;
-pub(crate) type Result<T> = std::result::Result<T, Error>;
-#[allow(clippy::absolute_paths)]
-pub type ApiResult<T> = std::result::Result<T, ApiError>;
 
 /// The homeserver errors
 #[derive(Debug, thiserror::Error)]
-pub(crate) enum Error {
+pub enum InternalError {
     #[error("Database Error: {0}")]
     Database(#[from] sea_orm::DbErr),
     #[error("{0}")]
@@ -39,43 +31,41 @@ pub(crate) enum Error {
 }
 
 #[derive(Debug, thiserror::Error)]
-pub enum ApiError {
+/// The homeserver errors
-    /// Error from the database (500 Internal Server Error)
+pub enum ServerError {
-    #[error("Internal server error")]
+    /// Internal server error, should not be exposed to the user
-    SeaOrm(#[from] sea_orm::DbErr),
+    #[error("{0}")]
-    /// The server registration is closed (403 Forbidden)
+    Internal(#[from] InternalError),
-    #[error("Server registration is closed")]
+    /// API error, errors happening in the API
-    RegistrationClosed,
+    #[error("{0}")]
-    /// The entered public key is already registered (400 Bad Request)
+    Api(#[from] ApiError),
-    #[error("The entered public key is already registered")]
+    /// WebSocket error, errors happening in the WebSocket
-    DuplicatedUser,
+    #[error("{0}")]
-    /// The user entered two different public keys
+    Ws(#[from] WsError),
-    /// one in the header and other in the request body
-    /// (400 Bad Request)
-    #[error("You entered two different public keys")]
-    TwoDifferentKeys,
 }
 
-impl ApiError {
+impl From<DbErr> for ServerError {
-    /// Status code of the error
+    fn from(err: DbErr) -> Self {
-    pub const fn status_code(&self) -> StatusCode {
+        Self::Internal(err.into())
-        match self {
+    }
-            Self::SeaOrm(_) => StatusCode::INTERNAL_SERVER_ERROR,
+}
-            Self::RegistrationClosed => StatusCode::FORBIDDEN,
+
-            Self::DuplicatedUser | Self::TwoDifferentKeys => StatusCode::BAD_REQUEST,
+impl From<ServerError> for WsError {
+    fn from(err: ServerError) -> Self {
+        match err {
+            ServerError::Api(ApiError::NotRegisteredUser) => WsError::RegistredUserEvent,
+            ServerError::Internal(_) | ServerError::Api(_) => WsError::InternalServerError,
+            ServerError::Ws(err) => err,
         }
     }
 }
 
-impl EndpointOutRegister for ApiError {
+impl From<ServerError> for ApiError {
-    fn register(_: &mut OapiComponents, _: &mut OapiOperation) {}
+    fn from(err: ServerError) -> Self {
-}
+        match err {
-
+            ServerError::Ws(WsError::RegistredUserEvent) => ApiError::NotRegisteredUser,
-impl Scribe for ApiError {
+            ServerError::Internal(_) | ServerError::Ws(_) => ApiError::Internal,
-    fn render(self, res: &mut Response) {
+            ServerError::Api(err) => err,
-        log::error!("Error: {self}");
+        }
-
-        res.status_code(self.status_code());
-        write_json_body(res, MessageSchema::new(self.to_string()));
     }
 }

crates/oxidetalis/src/extensions.rs

@@ -18,20 +18,21 @@ use std::sync::Arc;
 
 use chrono::Utc;
 use oxidetalis_config::Config;
+use oxidetalis_core::types::PublicKey;
 use rayon::iter::{IntoParallelRefMutIterator, ParallelIterator};
-use salvo::{websocket::Message, Depot};
+use salvo::Depot;
 use sea_orm::DatabaseConnection;
 use uuid::Uuid;
 
 use crate::{
     nonce::NonceCache,
-    websocket::{OnlineUsers, ServerEvent, SocketUserData},
+    websocket::{OnlineUsers, ServerEvent, SocketUserData, Unsigned},
 };
 
 /// Extension trait for the Depot.
 pub trait DepotExt {
     /// Returns the database connection
-    fn db_conn(&self) -> &DatabaseConnection;
+    fn db_conn(&self) -> Arc<DatabaseConnection>;
     /// Returns the server configuration
     fn config(&self) -> &Config;
     /// Retutns the nonce cache
@@ -54,12 +55,20 @@ pub trait OnlineUsersExt {
 
     /// Disconnect inactive users (who not respond for the ping event)
     async fn disconnect_inactive_users(&self);
+
+    /// Returns the connection id of the user, if it is online
+    async fn is_online(&self, public_key: &PublicKey) -> Option<Uuid>;
+
+    /// Send an event to user by connection id
+    async fn send(&self, conn_id: &Uuid, event: ServerEvent<Unsigned>);
 }
 
 impl DepotExt for Depot {
-    fn db_conn(&self) -> &DatabaseConnection {
+    fn db_conn(&self) -> Arc<DatabaseConnection> {
+        Arc::clone(
             self.obtain::<Arc<DatabaseConnection>>()
-            .expect("Database connection not found")
+                .expect("Database connection not found"),
+        )
     }
 
     fn config(&self) -> &Config {
@@ -87,9 +96,10 @@ impl OnlineUsersExt for OnlineUsers {
         let now = Utc::now();
         self.write().await.par_iter_mut().for_each(|(_, u)| {
             u.pinged_at = now;
-            let _ = u.sender.unbounded_send(Ok(Message::from(
+            let _ = u.sender.unbounded_send(Ok(ServerEvent::ping()
-                &ServerEvent::ping().sign(&u.shared_secret),
+                .sign(&u.shared_secret)
-            )));
+                .as_ref()
+                .into()));
         });
     }
 
@@ -110,4 +120,20 @@ impl OnlineUsersExt for OnlineUsers {
             true
         });
     }
+
+    async fn is_online(&self, public_key: &PublicKey) -> Option<Uuid> {
+        self.read()
+            .await
+            .iter()
+            .find(|(_, u)| &u.public_key == public_key)
+            .map(|(c, _)| *c)
+    }
+
+    async fn send(&self, conn_id: &Uuid, event: ServerEvent<Unsigned>) {
+        if let Some(user) = self.read().await.get(conn_id) {
+            let _ = user
+                .sender
+                .unbounded_send(Ok(event.sign(&user.shared_secret).as_ref().into()));
+        }
+    }
 }

crates/oxidetalis/src/macros.rs

@@ -0,0 +1,93 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! OxideTalis server macros, to make the code more readable and easier to
+//! write.
+
+/// Macro to return a [`ServerEvent`] with a [`WsError::InternalServerError`] if
+/// the result of an expression is an [`Err`].
+///
+/// ## Example
+/// ```rust,ignore
+/// fn example() -> ServerEvent {
+///    // some_function() returns a Result, if it's an Err, return an
+///    // ServerEvent::InternalServerError
+///    let result = try_ws!(some_function());
+///    ServerEvent::from(result)
+/// }
+/// ```
+///
+/// [`ServerEvent`]: crate::websocket::ServerEvent
+/// [`WsError::InternalServerError`]: crate::websocket::errors::WsError::InternalServerError
+/// [`Err`]: std::result::Result::Err
+#[macro_export]
+macro_rules! try_ws {
+    (Some $result_expr:expr) => {
+        match $result_expr {
+            Ok(val) => val,
+            Err(err) => {
+                log::error!("{err}");
+                return Some(
+                    $crate::websocket::ServerEvent::<$crate::websocket::Unsigned>::from(
+                        $crate::websocket::errors::WsError::from(err),
+                    ),
+                );
+            }
+        }
+    };
+}
+
+/// Macro to create the `WsError` enum with the given error names and reasons.
+///
+/// ## Example
+/// ```rust,ignore
+/// ws_errors! {
+///    FirstError = "This is the first error",
+///    SecondError = "This is the second error",
+/// }
+/// ```
+#[macro_export]
+macro_rules! ws_errors {
+    ($($name:ident = $reason:tt),+ $(,)?) => {
+        #[derive(Debug, thiserror::Error)]
+        #[doc = "Websocket errors, returned in the websocket communication"]
+        pub enum WsError {
+            $(
+                #[doc = $reason]
+                #[error($reason)]
+                $name
+            ),+
+        }
+        impl WsError {
+            #[doc = "Returns error name"]
+            pub const fn name(&self) -> &'static str {
+                match self {
+                    $(
+                        WsError::$name => stringify!($name)
+                    ),+
+                }
+            }
+            #[doc = "Returns the error reason"]
+            pub const fn reason(&self) -> &'static str {
+                match self {
+                    $(
+                        WsError::$name => $reason
+                    ),+
+                }
+            }
+        }
+    };
+}

crates/oxidetalis/src/main.rs

@@ -19,6 +19,7 @@
 
 use std::process::ExitCode;
 
+use errors::ServerError;
 use oxidetalis_config::{CliArgs, Parser};
 use oxidetalis_migrations::MigratorTrait;
 use salvo::{conn::TcpListener, Listener, Server};
@@ -26,18 +27,21 @@ use salvo::{conn::TcpListener, Listener, Server};
 mod database;
 mod errors;
 mod extensions;
+mod macros;
 mod middlewares;
 mod nonce;
+mod parameters;
 mod routes;
 mod schemas;
 mod utils;
 mod websocket;
 
-async fn try_main() -> errors::Result<()> {
+async fn try_main() -> errors::ServerResult<()> {
     pretty_env_logger::init_timed();
 
     log::info!("Parsing configuration");
-    let config = oxidetalis_config::Config::load(CliArgs::parse())?;
+    let config = oxidetalis_config::Config::load(CliArgs::parse())
+        .map_err(|err| ServerError::Internal(err.into()))?;
     log::info!("Configuration parsed successfully");
     log::info!("Connecting to the database");
     let connection = sea_orm::Database::connect(utils::postgres_url(&config.postgresdb)).await?;

crates/oxidetalis/src/parameters/mod.rs

@@ -0,0 +1,21 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! Set of route parameters for the API
+
+mod pagination;
+
+pub use pagination::*;

crates/oxidetalis/src/parameters/pagination.rs

@@ -0,0 +1,131 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! Pagination parameters for the API
+
+use std::{
+    fmt,
+    num::{NonZeroU32, NonZeroU8},
+    str::FromStr,
+};
+
+use salvo::{
+    extract::Metadata as ExtractMetadata,
+    oapi::{
+        Components as OapiComponents,
+        EndpointArgRegister,
+        Object,
+        Operation as OapiOperation,
+        Parameter,
+        ParameterIn,
+        Parameters,
+        SchemaType,
+        ToParameters,
+    },
+    Extractible,
+    Request,
+};
+use serde_json::json;
+
+use crate::routes::{ApiError, ApiResult};
+
+#[derive(Debug)]
+pub struct Pagination {
+    /// The page number of the result
+    pub page:      NonZeroU32,
+    /// The page size
+    pub page_size: NonZeroU8,
+}
+
+impl<'ex> Extractible<'ex> for Pagination {
+    fn metadata() -> &'ex ExtractMetadata {
+        static METADATA: ExtractMetadata = ExtractMetadata::new("");
+        &METADATA
+    }
+
+    #[allow(refining_impl_trait)]
+    async fn extract(req: &'ex mut Request) -> ApiResult<Self> {
+        let page = extract_query(req, "page", NonZeroU32::new(1).expect("is non-zero"))?;
+        let page_size = extract_query(req, "page_size", NonZeroU8::new(10).expect("is non-zero"))?;
+
+        Ok(Self { page, page_size })
+    }
+
+    #[allow(refining_impl_trait)]
+    async fn extract_with_arg(req: &'ex mut Request, _arg: &str) -> ApiResult<Self> {
+        Self::extract(req).await
+    }
+}
+
+impl ToParameters<'_> for Pagination {
+    fn to_parameters(_components: &mut OapiComponents) -> Parameters {
+        Parameters::new()
+            .parameter(create_parameter(
+                "page",
+                "Page number, starting from 1",
+                1,
+                f64::from(u32::MAX),
+            ))
+            .parameter(create_parameter(
+                "page_size",
+                "How many items per page, starting from 1",
+                10,
+                f64::from(u8::MAX),
+            ))
+    }
+}
+
+impl EndpointArgRegister for Pagination {
+    fn register(components: &mut OapiComponents, operation: &mut OapiOperation, _arg: &str) {
+        for parameter in Self::to_parameters(components) {
+            operation.parameters.insert(parameter);
+        }
+    }
+}
+
+/// Extract a query parameter from the request
+fn extract_query<T: FromStr>(req: &Request, name: &str, default_value: T) -> ApiResult<T>
+where
+    <T as FromStr>::Err: fmt::Display,
+{
+    Ok(req
+        .queries()
+        .get(name)
+        .map(|p| p.parse::<T>())
+        .transpose()
+        .map_err(|err| ApiError::Querys(format!("Invalid value for `{name}` query ({err})")))?
+        .unwrap_or(default_value))
+}
+
+/// Create a parameter for the pagination
+fn create_parameter(name: &str, description: &str, default: usize, max: f64) -> Parameter {
+    Parameter::new(name)
+        .parameter_in(ParameterIn::Query)
+        .required(false)
+        .description(description)
+        .example(json!(default))
+        .schema(
+            Object::new()
+                .name(name)
+                .description(description)
+                .schema_type(SchemaType::Integer)
+                .default_value(json!(default))
+                .example(json!(default))
+                .maximum(max)
+                .minimum(1.0)
+                .read_only(true),
+        )
+}

crates/oxidetalis/src/routes/errors.rs

@@ -0,0 +1,77 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+use salvo::{
+    http::StatusCode,
+    oapi::{Components as OapiComponents, EndpointOutRegister, Operation as OapiOperation},
+    Response,
+    Scribe,
+};
+
+use crate::{routes::write_json_body, schemas::MessageSchema};
+
+/// Result type of the API
+pub type ApiResult<T> = Result<T, ApiError>;
+
+#[derive(Debug, thiserror::Error)]
+pub enum ApiError {
+    #[error("Internal server error")]
+    Internal,
+    /// The server registration is closed (403 Forbidden)
+    #[error("Server registration is closed")]
+    RegistrationClosed,
+    /// The entered public key is already registered (400 Bad Request)
+    #[error("The entered public key is already registered")]
+    AlreadyRegistered,
+    /// The user entered two different public keys
+    /// one in the header and other in the request body
+    /// (400 Bad Request)
+    #[error("You entered two different public keys")]
+    TwoDifferentKeys,
+    /// Error in the query parameters (400 Bad Request)
+    #[error("{0}")]
+    Querys(String),
+    /// Non registered user tried to access to registered user only endpoint
+    /// (403 Forbidden)
+    #[error("You are not a registered user, please register first")]
+    NotRegisteredUser,
+}
+
+impl ApiError {
+    /// Status code of the error
+    pub const fn status_code(&self) -> StatusCode {
+        match self {
+            Self::Internal => StatusCode::INTERNAL_SERVER_ERROR,
+            Self::RegistrationClosed | Self::NotRegisteredUser => StatusCode::FORBIDDEN,
+            Self::AlreadyRegistered | Self::TwoDifferentKeys | Self::Querys(_) => {
+                StatusCode::BAD_REQUEST
+            }
+        }
+    }
+}
+
+impl EndpointOutRegister for ApiError {
+    fn register(_: &mut OapiComponents, _: &mut OapiOperation) {}
+}
+
+impl Scribe for ApiError {
+    fn render(self, res: &mut Response) {
+        log::error!("Error: {self}");
+
+        res.status_code(self.status_code());
+        write_json_body(res, MessageSchema::new(self.to_string()));
+    }
+}

crates/oxidetalis/src/routes/mod.rs

@@ -27,8 +27,11 @@ use crate::nonce::NonceCache;
 use crate::schemas::MessageSchema;
 use crate::{middlewares, websocket};
 
+mod errors;
 mod user;
 
+pub use errors::*;
+
 pub fn write_json_body(res: &mut Response, json_body: impl serde::Serialize) {
     res.write_body(serde_json::to_string(&json_body).expect("Json serialization can't be fail"))
         .ok();

crates/oxidetalis/src/routes/user.rs

@@ -20,18 +20,20 @@ use oxidetalis_core::types::{PublicKey, Signature};
 use salvo::{
     http::StatusCode,
     oapi::{endpoint, extract::JsonBody},
+    writing::Json,
     Depot,
     Request,
     Router,
     Writer,
 };
 
+use super::{ApiError, ApiResult};
 use crate::{
-    database::UserTableExt,
+    database::{UserTableExt, UsersStatusExt},
-    errors::{ApiError, ApiResult},
     extensions::DepotExt,
     middlewares,
-    schemas::{EmptySchema, MessageSchema, RegisterUserBody},
+    parameters::Pagination,
+    schemas::{BlackListedUser, EmptySchema, MessageSchema, RegisterUserBody, WhiteListedUser},
     utils,
 };
 
@@ -79,10 +81,90 @@ pub async fn register(
     Ok(EmptySchema::new(StatusCode::CREATED))
 }
 
+/// (🔐) Get whitelisted users
+#[endpoint(
+    operation_id = "whitelist",
+    tags("User"),
+    responses(
+        (status_code = 200, description = "Returns whitelisted users", content_type = "application/json", body = Vec<WhiteListedUser>),
+        (status_code = 400, description = "Wrong query parameter", content_type = "application/json", body = MessageSchema),
+        (status_code = 401, description = "The entered signature or public key is invalid", content_type = "application/json", body = MessageSchema),
+        (status_code = 403, description = "Not registered user, must register first", content_type = "application/json", body = MessageSchema),
+        (status_code = 429, description = "Too many requests", content_type = "application/json", body = MessageSchema),
+        (status_code = 500, description = "Internal server error", content_type = "application/json", body = MessageSchema),
+    ),
+    parameters(
+        ("X-OTMP-PUBLIC"    = PublicKey, Header, description = "Public key of the sender"),
+        ("X-OTMP-SIGNATURE" = Signature, Header, description = "Signature of the request"),
+    ),
+)]
+async fn user_whitelist(
+    req: &mut Request,
+    depot: &mut Depot,
+    pagination: Pagination,
+) -> ApiResult<Json<Vec<WhiteListedUser>>> {
+    let conn = depot.db_conn();
+    let user = conn
+        .get_user_by_pubk(
+            &utils::extract_public_key(req)
+                .expect("Public key should be checked in the middleware"),
+        )
+        .await?
+        .ok_or(ApiError::NotRegisteredUser)?;
+    Ok(Json(
+        conn.user_whitelist(&user, pagination.page, pagination.page_size)
+            .await?
+            .into_iter()
+            .map(Into::into)
+            .collect(),
+    ))
+}
+
+/// (🔐) Get blacklisted users
+#[endpoint(
+    operation_id = "blacklist",
+    tags("User"),
+    responses(
+        (status_code = 200, description = "Returns blacklisted users", content_type = "application/json", body = Vec<BlackListedUser>),
+        (status_code = 400, description = "Wrong query parameter", content_type = "application/json", body = MessageSchema),
+        (status_code = 401, description = "The entered signature or public key is invalid", content_type = "application/json", body = MessageSchema),
+        (status_code = 403, description = "Not registered user, must register first", content_type = "application/json", body = MessageSchema),
+        (status_code = 429, description = "Too many requests", content_type = "application/json", body = MessageSchema),
+        (status_code = 500, description = "Internal server error", content_type = "application/json", body = MessageSchema),
+    ),
+    parameters(
+        ("X-OTMP-PUBLIC"    = PublicKey, Header, description = "Public key of the sender"),
+        ("X-OTMP-SIGNATURE" = Signature, Header, description = "Signature of the request"),
+    ),
+)]
+async fn user_blacklist(
+    req: &mut Request,
+    depot: &mut Depot,
+    pagination: Pagination,
+) -> ApiResult<Json<Vec<BlackListedUser>>> {
+    let conn = depot.db_conn();
+    let user = conn
+        .get_user_by_pubk(
+            &utils::extract_public_key(req)
+                .expect("Public key should be checked in the middleware"),
+        )
+        .await?
+        .ok_or(ApiError::NotRegisteredUser)?;
+    Ok(Json(
+        conn.user_blacklist(&user, pagination.page, pagination.page_size)
+            .await?
+            .into_iter()
+            .map(Into::into)
+            .collect(),
+    ))
+}
+
 /// The route of the endpoints of this module
 pub fn route() -> Router {
     Router::new()
         .push(Router::with_path("register").post(register))
+        .push(Router::with_path("whitelist").get(user_whitelist))
+        .push(Router::with_path("blacklist").get(user_blacklist))
         .hoop(middlewares::public_key_check)
         .hoop(middlewares::signature_check)
 }

crates/oxidetalis/src/schemas/user.rs

@@ -14,7 +14,11 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
 
+use std::str::FromStr;
+
+use chrono::{DateTime, Utc};
 use oxidetalis_core::{cipher::K256Secret, types::PublicKey};
+use oxidetalis_entities::prelude::*;
 use salvo::oapi::ToSchema;
 use serde::{Deserialize, Serialize};
 
@@ -25,3 +29,57 @@ pub struct RegisterUserBody {
     /// The public key of the user
     pub public_key: PublicKey,
 }
+
+#[derive(Serialize, Deserialize, Clone, Debug, ToSchema, derive_new::new)]
+#[salvo(schema(name = WhiteListedUser, example = json!(WhiteListedUser::default())))]
+pub struct WhiteListedUser {
+    /// User's public key
+    pub public_key:     PublicKey,
+    /// When the user was whitelisted
+    pub whitelisted_at: DateTime<Utc>,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, ToSchema, derive_new::new)]
+#[salvo(schema(name = BlackListedUser, example = json!(BlackListedUser::default())))]
+pub struct BlackListedUser {
+    /// User's public key
+    pub public_key:     PublicKey,
+    /// When the user was blacklisted
+    pub blacklisted_at: DateTime<Utc>,
+}
+
+impl Default for WhiteListedUser {
+    fn default() -> Self {
+        WhiteListedUser::new(
+            PublicKey::from_str("bYhbrm61ov8GLZfskUYbsCLJTfaacMsuTBYgBABEH9dy").expect("is valid"),
+            Utc::now(),
+        )
+    }
+}
+
+impl From<UsersStatusModel> for WhiteListedUser {
+    fn from(user: UsersStatusModel) -> Self {
+        Self {
+            public_key:     PublicKey::from_str(&user.target).expect("Is valid public key"),
+            whitelisted_at: user.updated_at,
+        }
+    }
+}
+
+impl Default for BlackListedUser {
+    fn default() -> Self {
+        BlackListedUser::new(
+            PublicKey::from_str("bYhbrm61ov8GLZfskUYbsCLJTfaacMsuTBYgBABEH9dy").expect("is valid"),
+            Utc::now(),
+        )
+    }
+}
+
+impl From<UsersStatusModel> for BlackListedUser {
+    fn from(user: UsersStatusModel) -> Self {
+        Self {
+            public_key:     PublicKey::from_str(&user.target).expect("Is valid public key"),
+            blacklisted_at: user.updated_at,
+        }
+    }
+}

crates/oxidetalis/src/websocket/errors.rs

@@ -16,42 +16,27 @@
 
 //! Websocket errors
 
+use crate::ws_errors;
+
 /// Result type of websocket
 pub type WsResult<T> = Result<T, WsError>;
 
-/// Websocket errors, returned in the websocket communication
+ws_errors! {
-#[derive(Debug)]
+    InternalServerError = "Internal server error",
-pub enum WsError {
+    InvalidSignature = "Invalid event signature",
-    /// The signature is invalid
+    NotTextMessage = "The websocket message must be text message",
-    InvalidSignature,
+    InvalidJsonData = "Received invalid json data, the text must be valid json",
-    /// Message type must be text
+    UnknownClientEvent = "Unknown client event, the event is not recognized by the server",
-    NotTextMessage,
+    RegistredUserEvent = "The event is only for registred users",
-    /// Invalid json data
+    UserNotFound = "The user is not registered in the server",
-    InvalidJsonData,
+    AlreadyOnTheWhitelist = "The user is already on your whitelist",
-    /// Unknown client event
+    CannotAddSelfToWhitelist = "You cannot add yourself to the whitelist",
-    UnknownClientEvent,
+    AlreadyOnTheBlacklist = "The user is already on your blacklist",
-}
+    CannotAddSelfToBlacklist = "You cannot add yourself to the blacklist",
-
+    AlreadySendChatRequest = "You have already sent a chat request to this user",
-impl WsError {
+    CannotSendChatRequestToSelf = "You cannot send a chat request to yourself",
-    /// Returns error name
+    CannotRespondToOwnChatRequest = "You cannot respond to your own chat request",
-    pub const fn name(&self) -> &'static str {
+    NoChatRequestFromRecipient = "You do not have a chat request from the recipient",
-        match self {
+    RecipientBlacklist = "You cannot send a chat request because you are on the recipient's blacklist.",
-            WsError::InvalidSignature => "InvalidSignature",
+    AlreadyInRecipientWhitelist = "You are already on the recipient's whitelist and can chat with them."
-            WsError::NotTextMessage => "NotTextMessage",
-            WsError::InvalidJsonData => "InvalidJsonData",
-            WsError::UnknownClientEvent => "UnknownClientEvent",
-        }
-    }
-
-    /// Returns the error reason
-    pub const fn reason(&self) -> &'static str {
-        match self {
-            WsError::InvalidSignature => "Invalid event signature",
-            WsError::NotTextMessage => "The websocket message must be text message",
-            WsError::InvalidJsonData => "Received invalid json data, the text must be valid json",
-            WsError::UnknownClientEvent => {
-                "Unknown client event, the event is not recognized by the server"
-            }
-        }
-    }
 }

crates/oxidetalis/src/websocket/events/client.rs

@@ -16,7 +16,7 @@
 
 //! Events that the client send it
 
-use oxidetalis_core::types::Signature;
+use oxidetalis_core::types::{PublicKey, Signature};
 use serde::{Deserialize, Serialize};
 
 use crate::{nonce::NonceCache, utils};
@@ -24,10 +24,14 @@ use crate::{nonce::NonceCache, utils};
 /// Client websocket event
 #[derive(Deserialize, Clone, Debug)]
 pub struct ClientEvent {
+    #[serde(flatten)]
     pub event: ClientEventType,
     signature: Signature,
 }
 
+// ## Important for contuributors
+// Please make sure to order the event data alphabetically.
+
 /// Client websocket event type
 #[derive(Serialize, Deserialize, Clone, Eq, PartialEq, Debug)]
 #[serde(rename_all = "PascalCase", tag = "event", content = "data")]
@@ -36,6 +40,10 @@ pub enum ClientEventType {
     Ping { timestamp: u64 },
     /// Pong event
     Pong { timestamp: u64 },
+    /// Request to chat with a user
+    ChatRequest { to: PublicKey },
+    /// Response to a chat request
+    ChatRequestResponse { accepted: bool, to: PublicKey },
 }
 
 impl ClientEventType {

crates/oxidetalis/src/websocket/events/server.rs

@@ -19,7 +19,10 @@
 use std::marker::PhantomData;
 
 use chrono::Utc;
-use oxidetalis_core::{cipher::K256Secret, types::Signature};
+use oxidetalis_core::{
+    cipher::K256Secret,
+    types::{PublicKey, Signature},
+};
 use salvo::websocket::Message;
 use serde::Serialize;
 
@@ -28,6 +31,7 @@ use crate::websocket::errors::WsError;
 /// Signed marker, used to indicate that the event is signed
 pub struct Signed;
 /// Unsigned marker, used to indicate that the event is unsigned
+#[derive(Debug)]
 pub struct Unsigned;
 
 /// Server websocket event
@@ -42,12 +46,16 @@ pub struct ServerEvent<T> {
 
 /// server websocket event type
 #[derive(Serialize, Clone, Eq, PartialEq, Debug)]
-#[serde(rename_all = "PascalCase")]
+#[serde(rename_all = "PascalCase", tag = "event", content = "data")]
 pub enum ServerEventType {
     /// Ping event
     Ping { timestamp: u64 },
     /// Pong event
     Pong { timestamp: u64 },
+    /// New chat request from someone
+    ChatRequest { from: PublicKey },
+    /// New chat request response from someone
+    ChatRequestResponse { accepted: bool, from: PublicKey },
     /// Error event
     Error {
         name:   &'static str,
@@ -88,6 +96,16 @@ impl ServerEvent<Unsigned> {
         })
     }
 
+    /// Create chat request event
+    pub fn chat_request(from: &PublicKey) -> Self {
+        Self::new(ServerEventType::ChatRequest { from: *from })
+    }
+
+    /// Create chat request response event
+    pub fn chat_request_response(from: PublicKey, accepted: bool) -> Self {
+        Self::new(ServerEventType::ChatRequestResponse { from, accepted })
+    }
+
     /// Sign the event
     pub fn sign(self, shared_secret: &[u8; 32]) -> ServerEvent<Signed> {
         ServerEvent::<Signed> {
@@ -101,6 +119,12 @@ impl ServerEvent<Unsigned> {
     }
 }
 
+impl<S> AsRef<Self> for ServerEvent<S> {
+    fn as_ref(&self) -> &Self {
+        self
+    }
+}
+
 impl From<&ServerEvent<Signed>> for Message {
     fn from(value: &ServerEvent<Signed>) -> Self {
         Message::text(serde_json::to_string(value).expect("This can't fail"))

crates/oxidetalis/src/websocket/handlers/chat_request.rs

@@ -0,0 +1,138 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! Handler for incoming and outgoing chat requests.
+
+use std::str::FromStr;
+
+use oxidetalis_core::types::PublicKey;
+use oxidetalis_entities::prelude::*;
+use sea_orm::DatabaseConnection;
+
+use crate::database::InChatRequestsExt;
+use crate::errors::ServerError;
+use crate::extensions::OnlineUsersExt;
+use crate::{
+    database::{OutChatRequestsExt, UserTableExt, UsersStatusExt},
+    try_ws,
+    websocket::{errors::WsError, ServerEvent, Unsigned, ONLINE_USERS},
+};
+
+/// Handle a chat request from a user.
+#[logcall::logcall]
+pub async fn handle_chat_request(
+    db: &DatabaseConnection,
+    from: Option<&UserModel>,
+    to_public_key: &PublicKey,
+) -> Option<ServerEvent<Unsigned>> {
+    let Some(from_user) = from else {
+        return Some(WsError::RegistredUserEvent.into());
+    };
+    let Some(to_user) = try_ws!(Some db.get_user_by_pubk(to_public_key).await) else {
+        return Some(WsError::UserNotFound.into());
+    };
+    if from_user.id == to_user.id {
+        return Some(WsError::CannotSendChatRequestToSelf.into());
+    }
+    // FIXME: When change the entity public key to a PublicKey type, change this
+    let from_public_key = PublicKey::from_str(&from_user.public_key).expect("Is valid public key");
+
+    if try_ws!(Some db.get_chat_request_to(from_user, to_public_key).await).is_some() {
+        return Some(WsError::AlreadySendChatRequest.into());
+    }
+
+    if try_ws!(Some db.is_blacklisted(&to_user, &from_public_key).await) {
+        return Some(WsError::RecipientBlacklist.into());
+    }
+
+    // To ignore the error if the requester added the recipient to the whitelist
+    // table before send a request to them
+    if let Err(ServerError::Internal(_)) = db.add_to_whitelist(from_user, to_public_key).await {
+        return Some(WsError::InternalServerError.into());
+    }
+
+    if try_ws!(Some db.is_whitelisted(&to_user, &from_public_key).await) {
+        return Some(WsError::AlreadyInRecipientWhitelist.into());
+    }
+
+    try_ws!(Some db.save_out_chat_request(from_user, to_public_key).await);
+    if let Some(conn_id) = ONLINE_USERS.is_online(to_public_key).await {
+        ONLINE_USERS
+            .send(&conn_id, ServerEvent::chat_request(&from_public_key))
+            .await;
+    } else {
+        try_ws!(Some db.save_in_chat_request(&from_public_key, &to_user).await);
+    }
+    None
+}
+
+#[logcall::logcall]
+pub async fn handle_chat_response(
+    db: &DatabaseConnection,
+    recipient: Option<&UserModel>,
+    sender_public_key: &PublicKey,
+    accepted: bool,
+) -> Option<ServerEvent<Unsigned>> {
+    let Some(recipient_user) = recipient else {
+        return Some(WsError::RegistredUserEvent.into());
+    };
+    let Some(sender_user) = try_ws!(Some db.get_user_by_pubk(sender_public_key).await) else {
+        return Some(WsError::UserNotFound.into());
+    };
+    if recipient_user.id == sender_user.id {
+        return Some(WsError::CannotRespondToOwnChatRequest.into());
+    }
+
+    // FIXME: When change the entity public key to a PublicKey type, change this
+    let recipient_public_key =
+        PublicKey::from_str(&recipient_user.public_key).expect("Is valid public key");
+
+    if try_ws!(Some
+        db.get_chat_request_to(&sender_user, &recipient_public_key)
+            .await
+    )
+    .is_none()
+    {
+        return Some(WsError::NoChatRequestFromRecipient.into());
+    }
+
+    // We don't need to handle the case where the sender is blacklisted or
+    // whitelisted already, just add it if it is not already there
+    let _ = if accepted {
+        db.add_to_whitelist(recipient_user, sender_public_key).await
+    } else {
+        db.add_to_blacklist(recipient_user, sender_public_key).await
+    };
+
+    try_ws!(Some
+        db.remove_out_chat_request(&sender_user, &recipient_public_key)
+            .await
+    );
+
+    if let Some(conn_id) = ONLINE_USERS.is_online(sender_public_key).await {
+        ONLINE_USERS
+            .send(
+                &conn_id,
+                ServerEvent::chat_request_response(recipient_public_key, accepted),
+            )
+            .await;
+    } else {
+        // TODO: Create a table for chat request responses, and send them when
+        // the user logs in
+    }
+
+    None
+}

crates/oxidetalis/src/websocket/handlers/mod.rs

@@ -0,0 +1,21 @@
+// OxideTalis Messaging Protocol homeserver implementation
+// Copyright (C) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://gnu.org/licenses/agpl-3.0>.
+
+//! Websocket event handlers.
+
+mod chat_request;
+
+pub use chat_request::*;

crates/oxidetalis/src/websocket/mod.rs

@@ -21,6 +21,7 @@ use errors::{WsError, WsResult};
 use futures::{channel::mpsc, FutureExt, StreamExt, TryStreamExt};
 use once_cell::sync::Lazy;
 use oxidetalis_core::{cipher::K256Secret, types::PublicKey};
+use oxidetalis_entities::prelude::*;
 use salvo::{
     handler,
     http::StatusError,
@@ -30,15 +31,18 @@ use salvo::{
     Response,
     Router,
 };
+use sea_orm::DatabaseConnection;
 use tokio::{sync::RwLock, task::spawn as tokio_spawn, time::sleep as tokio_sleep};
 
-mod errors;
+pub mod errors;
 mod events;
+mod handlers;
 
 pub use events::*;
 use uuid::Uuid;
 
 use crate::{
+    database::UserTableExt,
     extensions::{DepotExt, OnlineUsersExt},
     middlewares,
     nonce::NonceCache,
@@ -92,6 +96,7 @@ pub async fn user_connected(
     depot: &Depot,
 ) -> Result<(), StatusError> {
     let nonce_cache = depot.nonce_cache();
+    let db_conn = depot.db_conn();
     let public_key =
         utils::extract_public_key(req).expect("The public key was checked in the middleware");
     // FIXME: The config should hold `K256Secret` not `PrivateKey`
@@ -100,7 +105,7 @@ pub async fn user_connected(
 
     WebSocketUpgrade::new()
         .upgrade(req, res, move |ws| {
-            handle_socket(ws, nonce_cache, public_key, shared_secret)
+            handle_socket(ws, db_conn, nonce_cache, public_key, shared_secret)
         })
         .await
 }
@@ -108,6 +113,7 @@ pub async fn user_connected(
 /// Handle the websocket connection
 async fn handle_socket(
     ws: WebSocket,
+    db_conn: Arc<DatabaseConnection>,
     nonce_cache: Arc<NonceCache>,
     user_public_key: PublicKey,
     user_shared_secret: [u8; 32],
@@ -123,27 +129,47 @@ async fn handle_socket(
     });
     tokio_spawn(fut);
     let conn_id = Uuid::new_v4();
-    let user = SocketUserData::new(user_public_key, user_shared_secret, sender.clone());
+    let Ok(user) = db_conn.get_user_by_pubk(&user_public_key).await else {
-    ONLINE_USERS.add_user(&conn_id, user).await;
+        let _ = sender.unbounded_send(Ok(ServerEvent::from(WsError::InternalServerError)
+            .sign(&user_shared_secret)
+            .as_ref()
+            .into()));
+        return;
+    };
+    ONLINE_USERS
+        .add_user(
+            &conn_id,
+            SocketUserData::new(user_public_key, user_shared_secret, sender.clone()),
+        )
+        .await;
     log::info!("New user connected: ConnId(={conn_id}) PublicKey(={user_public_key})");
 
+    // TODO: Send the incoming chat request to the user, while they are offline.
+    // This after adding last_login col to the user table
+
     let fut = async move {
         while let Some(Ok(msg)) = user_ws_receiver.next().await {
             match handle_ws_msg(msg, &nonce_cache, &user_shared_secret).await {
                 Ok(event) => {
-                    if let Some(server_event) = handle_events(event, &conn_id).await {
+                    if let Some(server_event) =
-                        if let Err(err) = sender.unbounded_send(Ok(Message::from(
+                        handle_events(event, &db_conn, &conn_id, user.as_ref()).await
-                            &server_event.sign(&user_shared_secret),
+                    {
-                        ))) {
+                        if let Err(err) = sender.unbounded_send(Ok(server_event
+                            .sign(&user_shared_secret)
+                            .as_ref()
+                            .into()))
+                        {
                             log::error!("Websocket Error: {err}");
                             break;
                         }
                     };
                 }
                 Err(err) => {
-                    if let Err(err) = sender.unbounded_send(Ok(Message::from(
+                    if let Err(err) = sender.unbounded_send(Ok(ServerEvent::from(err)
-                        &ServerEvent::from(err).sign(&user_shared_secret),
+                        .sign(&user_shared_secret)
-                    ))) {
+                        .as_ref()
+                        .into()))
+                    {
                         log::error!("Websocket Error: {err}");
                         break;
                     };
@@ -178,13 +204,22 @@ async fn handle_ws_msg(
 }
 
 /// Handle user events, and return the server event if needed
-async fn handle_events(event: ClientEvent, conn_id: &Uuid) -> Option<ServerEvent<Unsigned>> {
+async fn handle_events(
+    event: ClientEvent,
+    db: &DatabaseConnection,
+    conn_id: &Uuid,
+    user: Option<&UserModel>,
+) -> Option<ServerEvent<Unsigned>> {
     match &event.event {
         ClientEventType::Ping { .. } => Some(ServerEvent::pong()),
         ClientEventType::Pong { .. } => {
             ONLINE_USERS.update_pong(conn_id).await;
             None
         }
+        ClientEventType::ChatRequest { to } => handlers::handle_chat_request(db, user, to).await,
+        ClientEventType::ChatRequestResponse { to, accepted } => {
+            handlers::handle_chat_response(db, user, to, *accepted).await
+        }
     }
 }
 

crates/oxidetalis_entities/Cargo.toml

@@ -11,7 +11,8 @@ rust-version.workspace = true
 
 
 [dependencies]
-sea-orm = {workspace = true }
+sea-orm = { workspace = true }
+chrono  = { workspace = true }
 
 [lints.rust]
 unsafe_code = "deny"

crates/oxidetalis_entities/src/incoming_chat_requests.rs

@@ -0,0 +1,57 @@
+// OxideTalis Messaging Protocol homeserver core implementation
+// Copyright (c) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use chrono::Utc;
+use sea_orm::entity::prelude::*;
+
+use crate::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq)]
+#[sea_orm(table_name = "in_chat_requests")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id:           UserId,
+    pub recipient_id: UserId,
+    /// Public key of the sender
+    pub sender:       String,
+    /// The timestamp of the request, when it was received
+    pub in_on:        chrono::DateTime<Utc>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "UserEntity",
+        from = "Column::RecipientId",
+        to = "super::users::Column::Id"
+        on_update = "NoAction",
+        on_delete = "Cascade"
+    )]
+    RecipientId,
+}
+
+impl Related<UserEntity> for Entity {
+    fn to() -> RelationDef {
+        Relation::RecipientId.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/oxidetalis_entities/src/lib.rs

@@ -19,5 +19,8 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+pub mod incoming_chat_requests;
+pub mod outgoing_chat_requests;
 pub mod prelude;
 pub mod users;
+pub mod users_status;

crates/oxidetalis_entities/src/outgoing_chat_requests.rs

@@ -0,0 +1,57 @@
+// OxideTalis Messaging Protocol homeserver core implementation
+// Copyright (c) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use chrono::Utc;
+use sea_orm::entity::prelude::*;
+
+use crate::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq)]
+#[sea_orm(table_name = "out_chat_requests")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id:        UserId,
+    pub sender_id: UserId,
+    /// Public key of the recipient
+    pub recipient: String,
+    /// The timestamp of the request, when it was sent
+    pub out_on:    chrono::DateTime<Utc>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "UserEntity",
+        from = "Column::SenderId",
+        to = "super::users::Column::Id"
+        on_update = "NoAction",
+        on_delete = "Cascade"
+    )]
+    SenderId,
+}
+
+impl Related<UserEntity> for Entity {
+    fn to() -> RelationDef {
+        Relation::SenderId.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/oxidetalis_entities/src/prelude.rs

@@ -22,8 +22,10 @@
 pub use sea_orm::{
     ActiveModelTrait,
     ColumnTrait,
+    EntityOrSelect,
     EntityTrait,
     IntoActiveModel,
+    ModelTrait,
     Order,
     PaginatorTrait,
     QueryFilter,
@@ -33,9 +35,31 @@ pub use sea_orm::{
     SqlErr,
 };
 
+/// User ID type
+pub type UserId = i64;
+
+pub use super::incoming_chat_requests::{
+    ActiveModel as InChatRequestsActiveModel,
+    Column as InChatRequestsColumn,
+    Entity as InChatRequestsEntity,
+    Model as InChatRequestsModel,
+};
+pub use super::outgoing_chat_requests::{
+    ActiveModel as OutChatRequestsActiveModel,
+    Column as OutChatRequestsColumn,
+    Entity as OutChatRequestsEntity,
+    Model as OutChatRequestsModel,
+};
 pub use super::users::{
     ActiveModel as UserActiveModel,
     Column as UserColumn,
     Entity as UserEntity,
     Model as UserModel,
 };
+pub use super::users_status::{
+    AccessStatus,
+    ActiveModel as UsersStatusActiveModel,
+    Column as UsersStatusColumn,
+    Entity as UsersStatusEntity,
+    Model as UsersStatusModel,
+};

crates/oxidetalis_entities/src/users.rs

@@ -21,16 +21,43 @@
 
 use sea_orm::entity::prelude::*;
 
+use crate::prelude::*;
+
 #[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq)]
 #[sea_orm(table_name = "users")]
 pub struct Model {
     #[sea_orm(primary_key)]
-    pub id:         i32,
+    pub id:         UserId,
     pub public_key: String,
     pub is_admin:   bool,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
-pub enum Relation {}
+pub enum Relation {
+    #[sea_orm(has_many = "InChatRequestsEntity")]
+    InChatRequests,
+    #[sea_orm(has_many = "OutChatRequestsEntity")]
+    OutChatRequests,
+    #[sea_orm(has_many = "UsersStatusEntity")]
+    UsersStatus,
+}
+
+impl Related<InChatRequestsEntity> for Entity {
+    fn to() -> RelationDef {
+        Relation::InChatRequests.def()
+    }
+}
+
+impl Related<OutChatRequestsEntity> for Entity {
+    fn to() -> RelationDef {
+        Relation::OutChatRequests.def()
+    }
+}
+
+impl Related<UsersStatusEntity> for Entity {
+    fn to() -> RelationDef {
+        Relation::UsersStatus.def()
+    }
+}
 
 impl ActiveModelBehavior for ActiveModel {}

crates/oxidetalis_entities/src/users_status.rs

@@ -0,0 +1,66 @@
+// OxideTalis Messaging Protocol homeserver core implementation
+// Copyright (c) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use chrono::Utc;
+use sea_orm::entity::prelude::*;
+
+use crate::prelude::*;
+
+#[derive(Debug, Clone, Eq, PartialEq, EnumIter, DeriveActiveEnum)]
+#[sea_orm(rs_type = "String", db_type = "Enum", enum_name = "access_status")]
+pub enum AccessStatus {
+    #[sea_orm(string_value = "whitelisted")]
+    Whitelisted,
+    #[sea_orm(string_value = "blacklisted")]
+    Blacklisted,
+}
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Eq)]
+#[sea_orm(table_name = "users_status")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id:         UserId,
+    pub user_id:    UserId,
+    /// Public key of the target
+    pub target:     String,
+    pub status:     AccessStatus,
+    pub updated_at: chrono::DateTime<Utc>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "UserEntity",
+        from = "Column::UserId",
+        to = "super::users::Column::Id"
+        on_update = "NoAction",
+        on_delete = "Cascade"
+    )]
+    UserId,
+}
+
+impl Related<UserEntity> for Entity {
+    fn to() -> RelationDef {
+        Relation::UserId.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/oxidetalis_migrations/src/create_incoming_chat_requests_table.rs

@@ -0,0 +1,89 @@
+// OxideTalis Messaging Protocol homeserver core implementation
+// Copyright (c) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use sea_orm_migration::prelude::*;
+
+use crate::create_users_table::Users;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(InChatRequests::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(InChatRequests::Id)
+                            .big_integer()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(
+                        ColumnDef::new(InChatRequests::RecipientId)
+                            .big_integer()
+                            .not_null(),
+                    )
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-in_chat_requests-users")
+                            .from(InChatRequests::Table, InChatRequests::RecipientId)
+                            .to(Users::Table, Users::Id)
+                            .on_update(ForeignKeyAction::NoAction)
+                            .on_delete(ForeignKeyAction::Cascade),
+                    )
+                    .col(ColumnDef::new(InChatRequests::Sender).string().not_null())
+                    .col(
+                        ColumnDef::new(InChatRequests::InOn)
+                            .timestamp_with_time_zone()
+                            .not_null(),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .name("sep_request")
+                    .table(InChatRequests::Table)
+                    .col(InChatRequests::RecipientId)
+                    .col(InChatRequests::Sender)
+                    .unique()
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum InChatRequests {
+    Table,
+    Id,
+    RecipientId,
+    /// Public key of the sender
+    Sender,
+    InOn,
+}

crates/oxidetalis_migrations/src/create_outgoing_chat_requests_table.rs

@@ -0,0 +1,94 @@
+// OxideTalis Messaging Protocol homeserver core implementation
+// Copyright (c) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use sea_orm_migration::prelude::*;
+
+use crate::create_users_table::Users;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(OutChatRequests::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(OutChatRequests::Id)
+                            .big_integer()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(
+                        ColumnDef::new(OutChatRequests::SenderId)
+                            .big_integer()
+                            .not_null(),
+                    )
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-out_chat_requests-users")
+                            .from(OutChatRequests::Table, OutChatRequests::SenderId)
+                            .to(Users::Table, Users::Id)
+                            .on_update(ForeignKeyAction::NoAction)
+                            .on_delete(ForeignKeyAction::Cascade),
+                    )
+                    .col(
+                        ColumnDef::new(OutChatRequests::Recipient)
+                            .string()
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(OutChatRequests::OutOn)
+                            .timestamp_with_time_zone()
+                            .not_null(),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .name("sep_request")
+                    .table(OutChatRequests::Table)
+                    .col(OutChatRequests::SenderId)
+                    .col(OutChatRequests::Recipient)
+                    .unique()
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum OutChatRequests {
+    Table,
+    Id,
+    SenderId,
+    /// Public key of the recipient
+    Recipient,
+    OutOn,
+}

crates/oxidetalis_migrations/src/create_users_status.rs

@@ -0,0 +1,128 @@
+// OxideTalis Messaging Protocol homeserver core implementation
+// Copyright (c) 2024 OxideTalis Developers <otmp@4rs.nl>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use std::fmt;
+
+use sea_orm::sea_query::extension::postgres::Type;
+use sea_orm_migration::prelude::*;
+
+use super::create_users_table::Users;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_type(
+                Type::create()
+                    .as_enum(AccessStatus::Name)
+                    .values(vec![AccessStatus::Whitelisted, AccessStatus::Blacklisted])
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_table(
+                Table::create()
+                    .table(UsersStatus::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(UsersStatus::Id)
+                            .big_integer()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(ColumnDef::new(UsersStatus::UserId).big_integer().not_null())
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk-users_status-users")
+                            .from(UsersStatus::Table, UsersStatus::UserId)
+                            .to(Users::Table, Users::Id)
+                            .on_update(ForeignKeyAction::NoAction)
+                            .on_delete(ForeignKeyAction::Cascade),
+                    )
+                    .col(ColumnDef::new(UsersStatus::Target).string().not_null())
+                    .col(
+                        ColumnDef::new(UsersStatus::Status)
+                            .enumeration(
+                                AccessStatus::Name,
+                                [AccessStatus::Whitelisted, AccessStatus::Blacklisted],
+                            )
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(UsersStatus::UpdatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null(),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .name("sep_status")
+                    .table(UsersStatus::Table)
+                    .col(UsersStatus::UserId)
+                    .col(UsersStatus::Target)
+                    .unique()
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+enum AccessStatus {
+    Name,
+    Whitelisted,
+    Blacklisted,
+}
+
+#[derive(DeriveIden)]
+enum UsersStatus {
+    Table,
+    Id,
+    UserId,
+    /// Public key of the target
+    Target,
+    Status,
+    UpdatedAt,
+}
+
+impl Iden for AccessStatus {
+    fn unquoted(&self, s: &mut dyn fmt::Write) {
+        write!(
+            s,
+            "{}",
+            match self {
+                Self::Name => "access_status",
+                Self::Whitelisted => "whitelisted",
+                Self::Blacklisted => "blacklisted",
+            }
+        )
+        .expect("is a string")
+    }
+}

crates/oxidetalis_migrations/src/create_users_table.rs

@@ -34,7 +34,7 @@ impl MigrationTrait for Migration {
                     .if_not_exists()
                     .col(
                         ColumnDef::new(Users::Id)
-                            .integer()
+                            .big_integer()
                             .not_null()
                             .auto_increment()
                             .primary_key(),
@@ -58,7 +58,7 @@ impl MigrationTrait for Migration {
 }
 
 #[derive(DeriveIden)]
-enum Users {
+pub enum Users {
     Table,
     Id,
     PublicKey,

crates/oxidetalis_migrations/src/lib.rs

@@ -19,8 +19,12 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-pub use sea_orm_migration::prelude::*;
+use sea_orm_migration::prelude::*;
+pub use sea_orm_migration::MigratorTrait;
 
+mod create_incoming_chat_requests_table;
+mod create_outgoing_chat_requests_table;
+mod create_users_status;
 mod create_users_table;
 
 pub struct Migrator;
@@ -28,6 +32,11 @@ pub struct Migrator;
 #[async_trait::async_trait]
 impl MigratorTrait for Migrator {
     fn migrations() -> Vec<Box<dyn MigrationTrait>> {
-        vec![Box::new(create_users_table::Migration)]
+        vec![
+            Box::new(create_users_table::Migration),
+            Box::new(create_incoming_chat_requests_table::Migration),
+            Box::new(create_outgoing_chat_requests_table::Migration),
+            Box::new(create_users_status::Migration),
+        ]
     }
 }