Add proper constraints to db tables. Report errors when listing users.

src/bot.rs

@@ -161,19 +161,25 @@ impl DiceBot {
         let client = self.client.clone();
         self.login(&client).await?;
 
+        // Initial sync without event handler prevents responding to
+        // messages received while bot was offline. TODO: selectively
+        // respond to old messages? e.g. comands missed while offline.
+        //info!("Performing intial sync (no commands will be responded to)");
+        // self.client.sync_once(SyncSettings::default()).await?;
+
         client.set_event_handler(Box::new(self)).await;
         info!("Listening for commands");
 
-        let token = client
-            .sync_token()
-            .await
-            .ok_or(BotError::SyncTokenRequired)?;
+        // let token = client
+        //     .sync_token()
+        //     .await
+        //     .ok_or(BotError::SyncTokenRequired)?;
 
-        let settings = SyncSettings::default().token(token);
+        // let settings = SyncSettings::default().token(token);
 
         // TODO replace with sync_with_callback for cleaner shutdown
         // process.
-        client.sync(settings).await;
+        client.sync(SyncSettings::default()).await;
         Ok(())
     }
 

src/bot/event_handlers.rs

@@ -136,7 +136,7 @@ impl EventHandler for DiceBot {
 
         let result = if event_affects_us && !adding_user {
             info!("Clearing all information for room ID {}", room_id);
-            self.db.clear_info(room_id_str).await
+            self.db.clear_info(room_id_str).await.map_err(|e| e.into())
         } else if event_affects_us && adding_user {
             info!("Joined room {}; recording room information", room_id);
             record_room_information(
@@ -149,10 +149,16 @@ impl EventHandler for DiceBot {
             .await
         } else if !event_affects_us && adding_user {
             info!("Adding user {} to room ID {}", username, room_id);
-            self.db.add_user_to_room(username, room_id_str).await
+            self.db
+                .add_user_to_room(username, room_id_str)
+                .await
+                .map_err(|e| e.into())
         } else if !event_affects_us && !adding_user {
             info!("Removing user {} from room ID {}", username, room_id);
-            self.db.remove_user_from_room(username, room_id_str).await
+            self.db
+                .remove_user_from_room(username, room_id_str)
+                .await
+                .map_err(|e| e.into())
         } else {
             debug!("Ignoring a room member event: {:#?}", event);
             Ok(())

src/error.rs

@@ -36,10 +36,10 @@ pub enum BotError {
     #[error("error in matrix state store: {0}")]
     MatrixStateStoreError(#[from] matrix_sdk::StoreError),
 
-    #[error("uncategorized matrix SDK error")]
+    #[error("uncategorized matrix SDK error: {0}")]
     MatrixError(#[from] matrix_sdk::Error),
 
-    #[error("uncategorized matrix SDK base error")]
+    #[error("uncategorized matrix SDK base error: {0}")]
     MatrixBaseError(#[from] matrix_sdk::BaseError),
 
     #[error("future canceled")]

src/logic.rs

@@ -1,5 +1,6 @@
 use crate::db::sqlite::errors::DataError;
 use crate::db::sqlite::Rooms;
+use crate::error::BotError;
 use crate::matrix;
 use crate::models::RoomInfo;
 use futures::stream::{self, StreamExt, TryStreamExt};
@@ -12,9 +13,12 @@ pub async fn record_room_information(
     room_id: &RoomId,
     room_display_name: &str,
     our_username: &str,
-) -> Result<(), DataError> {
+) -> Result<(), BotError> {
+    //Clear out any old room info first.
+    db.clear_info(room_id.as_str()).await?;
+
     let room_id_str = room_id.as_str();
-    let usernames = matrix::get_users_in_room(&client, &room_id).await;
+    let usernames = matrix::get_users_in_room(&client, &room_id).await?;
 
     let info = RoomInfo {
         room_id: room_id_str.to_owned(),
@@ -29,12 +33,18 @@ pub async fn record_room_information(
         .into_iter()
         .filter(|username| username != our_username);
 
+    println!("Users to add to room: {:?}", filtered_usernames);
+
     // Async collect into vec of results, then use into_iter of result
     // to go to from Result<Vec<()>> to just Result<()>. Easier than
     // attempting to async-collect our way to a single Result<()>.
     stream::iter(filtered_usernames)
-        .then(|username| async move { db.add_user_to_room(&username, &room_id_str).await })
-        .collect::<Vec<Result<(), DataError>>>()
+        .then(|username| async move {
+            db.add_user_to_room(&username, &room_id_str)
+                .await
+                .map_err(|e| e.into())
+        })
+        .collect::<Vec<Result<(), BotError>>>()
         .await
         .into_iter()
         .collect()

src/matrix.rs

@@ -20,16 +20,19 @@ fn extract_error_message(error: MatrixError) -> String {
 }
 
 /// Retrieve a list of users in a given room.
-pub async fn get_users_in_room(client: &Client, room_id: &RoomId) -> Vec<String> {
+pub async fn get_users_in_room(
+    client: &Client,
+    room_id: &RoomId,
+) -> Result<Vec<String>, MatrixError> {
     if let Some(joined_room) = client.get_joined_room(room_id) {
-        let members = joined_room.joined_members().await.ok().unwrap_or_default();
+        let members = joined_room.joined_members().await?;
 
-        members
+        Ok(members
             .into_iter()
             .map(|member| member.user_id().to_string())
-            .collect()
+            .collect())
     } else {
-        vec![]
+        Ok(vec![])
     }
 }
 

src/migrator/migrations/V1__variables.rs

@@ -7,7 +7,6 @@ pub fn migration() -> String {
     info!("Applying migration: {}", file!());
 
     m.create_table("user_variables", |t| {
-        t.add_column("id", types::primary());
         t.add_column("room_id", types::text());
         t.add_column("user_id", types::text());
         t.add_column("key", types::text());

src/migrator/migrations/V2__rooms.rs

@@ -1,31 +1,33 @@
 use barrel::backend::Sqlite;
-use barrel::{types, Migration};
+use barrel::{types, types::Type, Migration};
 use log::info;
 
+fn primary_uuid() -> Type {
+    types::text().unique(true).primary(true).nullable(false)
+}
+
+fn autoincrement_int() -> Type {
+    types::integer()
+        .increments(true)
+        .unique(true)
+        .primary(false)
+}
+
 pub fn migration() -> String {
     let mut m = Migration::new();
     info!("Applying migration: {}", file!());
 
     //Table for basic room information: room ID, room name
     m.create_table("room_info", move |t| {
-        t.add_column("id", types::primary());
-        t.add_column("room_id", types::text());
+        t.add_column("room_id", primary_uuid());
         t.add_column("room_name", types::text());
     });
 
     //Table of users in rooms.
     m.create_table("room_users", move |t| {
-        t.add_column("id", types::primary());
-        t.add_column("room_id", types::text());
+        t.add_column("room_id", autoincrement_int());
         t.add_column("username", types::text());
     });
 
-    //Table of room ID, event ID, event timestamp
-    m.create_table("room_events", move |t| {
-        t.add_column("id", types::primary());
-        t.add_column("room_id", types::text());
-        t.add_column("event_id", types::text());
-        t.add_column("event_timestamp", types::integer());
-    });
     m.make::<Sqlite>()
 }

src/migrator/migrations/V4__room_events.rs

@@ -0,0 +1,38 @@
+use barrel::backend::Sqlite;
+use barrel::{types, types::Type, Migration};
+use log::info;
+
+fn primary_uuid() -> Type {
+    types::text().unique(true).nullable(false)
+}
+
+fn autoincrement_int() -> Type {
+    types::integer()
+        .increments(true)
+        .unique(true)
+        .primary(false)
+}
+
+pub fn migration() -> String {
+    let mut m = Migration::new();
+    info!("Applying migration: {}", file!());
+
+    //Table of room ID, event ID, event timestamp
+    m.create_table("room_events", move |t| {
+        t.add_column("room_id", types::text().nullable(false));
+        t.add_column("event_id", types::text().nullable(false));
+        t.add_column("event_timestamp", types::integer());
+    });
+
+    let mut res = m.make::<Sqlite>();
+
+    //This is a hack that gives us a composite primary key.
+    if res.ends_with(");") {
+        res.pop();
+        res.pop();
+    }
+
+    let x = format!("{}, PRIMARY KEY (room_id, event_id));", res);
+    println!("{}", x);
+    x
+}