src/bin/dicebot-cmd.rs

@@ -2,10 +2,20 @@ use chronicle_dicebot::commands;
 use chronicle_dicebot::context::Context;
 use chronicle_dicebot::db::Database;
 use chronicle_dicebot::error::BotError;
+use matrix_sdk::{
+    identifiers::{room_id, user_id},
+    Room,
+};
+
+fn dummy_room() -> Room {
+    Room::new(
+        &room_id!("!fakeroomid:example.com"),
+        &user_id!("@fakeuserid:example.com"),
+    )
+}
 
 #[tokio::main]
 async fn main() -> Result<(), BotError> {
-    let db = Database::new_temp()?;
     let input = std::env::args().skip(1).collect::<Vec<String>>().join(" ");
     let command = match commands::parser::parse_command(&input) {
         Ok(command) => command,
@@ -13,10 +23,10 @@ async fn main() -> Result<(), BotError> {
     };
 
     let context = Context {
-        db: db,
+        db: Database::new_temp()?,
         matrix_client: &matrix_sdk::Client::new("http://example.com")
             .expect("Could not create matrix client"),
-        room_id: "roomid",
+        room: &dummy_room(),
         username: "@localuser:example.com",
         message_body: &input,
     };

src/bot.rs

@@ -130,7 +130,7 @@ impl DiceBot {
             let ctx = Context {
                 db: self.db.clone(),
                 matrix_client: &self.client,
-                room_id: room_id.as_str(),
+                room: room,
                 username: &sender_username,
                 message_body: &command,
             };

src/bot/event_handlers.rs

@@ -1,7 +1,7 @@
 use super::DiceBot;
 use crate::db::Database;
 use crate::error::BotError;
-use crate::matrix;
+use crate::logic::record_room_information;
 use async_trait::async_trait;
 use log::{debug, error, info, warn};
 use matrix_sdk::{
@@ -123,13 +123,8 @@ impl EventEmitter for DiceBot {
                 info!("Clearing all information for room ID {}", room_id);
                 self.db.rooms.clear_info(room_id)
             } else if event_affects_us && adding_user {
-                info!("Joined room {}; recording user information", room_id);
-                let usernames = matrix::get_users_in_room(&self.client, &room.room_id).await;
-                usernames
-                    .into_iter()
-                    .filter(|username| username != &event.state_key)
-                    .map(|username| self.db.rooms.add_user_to_room(&username, room_id))
-                    .collect() //Make use of collect impl on Result.
+                info!("Joined room {}; recording room information", room_id);
+                record_room_information(&self.client, &self.db, &room, &event.state_key).await
             } else if !event_affects_us && adding_user {
                 info!("Adding user {} to room ID {}", username, room_id);
                 self.db.rooms.add_user_to_room(username, room_id)

src/cofd/dice.rs

@@ -323,6 +323,14 @@ mod tests {
     use super::*;
     use crate::db::Database;
 
+    /// Create dummy room instance.
+    fn dummy_room() -> matrix_sdk::Room {
+        matrix_sdk::Room::new(
+            &matrix_sdk::identifiers::room_id!("!fakeroomid:example.com"),
+            &matrix_sdk::identifiers::user_id!("@fakeuserid:example.com"),
+        )
+    }
+
     ///Instead of being random, generate a series of numbers we have complete
     ///control over.
     struct SequentialDieRoller {
@@ -464,7 +472,7 @@ mod tests {
         let ctx = Context {
             db: db,
             matrix_client: &matrix_sdk::Client::new("http://example.com").unwrap(),
-            room_id: "roomid",
+            room: &dummy_room(),
             username: "username",
             message_body: "message",
         };
@@ -495,7 +503,7 @@ mod tests {
         let ctx = Context {
             db: db,
             matrix_client: &matrix_sdk::Client::new("http://example.com").unwrap(),
-            room_id: "roomid",
+            room: &dummy_room(),
             username: "username",
             message_body: "message",
         };
@@ -519,15 +527,18 @@ mod tests {
 
     #[tokio::test]
     async fn can_resolve_variables_test() {
+        use crate::db::variables::UserAndRoom;
+
         let db = Database::new_temp().unwrap();
         let ctx = Context {
             db: db.clone(),
             matrix_client: &matrix_sdk::Client::new("http://example.com").unwrap(),
-            room_id: "roomid",
+            room: &dummy_room(),
             username: "username",
             message_body: "message",
         };
-        let user_and_room = crate::db::variables::UserAndRoom(&ctx.username, &ctx.room_id);
+
+        let user_and_room = UserAndRoom(&ctx.username, &ctx.room.room_id.as_str());
 
         db.variables
             .set_user_variable(&user_and_room, "myvariable", 10)

src/commands.rs

@@ -78,13 +78,21 @@ pub async fn execute_command(ctx: &Context<'_>) -> CommandResult {
 mod tests {
     use super::*;
 
+    /// Create a dummy room instance.
+    fn dummy_room() -> matrix_sdk::Room {
+        matrix_sdk::Room::new(
+            &matrix_sdk::identifiers::room_id!("!fakeroomid:example.com"),
+            &matrix_sdk::identifiers::user_id!("@fakeuserid:example.com"),
+        )
+    }
+
     #[tokio::test]
     async fn unrecognized_command() {
         let db = crate::db::Database::new_temp().unwrap();
         let ctx = Context {
             db: db,
             matrix_client: &matrix_sdk::Client::new("http://example.com").unwrap(),
-            room_id: "myroomid",
+            room: &dummy_room(),
             username: "myusername",
             message_body: "!notacommand",
         };

src/commands/management.rs

@@ -1,10 +1,9 @@
 use super::{Command, Execution};
 use crate::context::Context;
 use crate::db::errors::DataError;
-use crate::matrix;
+use crate::logic::record_room_information;
 use async_trait::async_trait;
-use matrix_sdk::identifiers::{RoomId, UserId};
-use std::convert::TryFrom;
+use matrix_sdk::identifiers::UserId;
 
 pub struct ResyncCommand;
 
@@ -17,17 +16,11 @@ impl Command for ResyncCommand {
     }
 
     async fn execute(&self, ctx: &Context<'_>) -> Execution {
-        let room_id = RoomId::try_from(ctx.room_id).expect("failed to decode room ID");
         let our_username: Option<UserId> = ctx.matrix_client.user_id().await;
         let our_username: &str = our_username.as_ref().map_or("", UserId::as_str);
 
-        let usernames = matrix::get_users_in_room(&ctx.matrix_client, &room_id).await;
-
-        let result: ResyncResult = usernames
-            .into_iter()
-            .filter(|username| username != our_username)
-            .map(|username| ctx.db.rooms.add_user_to_room(&username, room_id.as_str()))
-            .collect(); //Make use of collect impl on Result.
+        let result: ResyncResult =
+            record_room_information(ctx.matrix_client, &ctx.db, &ctx.room, our_username).await;
 
         let (plain, html) = match result {
             Ok(()) => {

src/commands/variables.rs

@@ -13,7 +13,7 @@ impl Command for GetAllVariablesCommand {
     }
 
     async fn execute(&self, ctx: &Context<'_>) -> Execution {
-        let key = UserAndRoom(&ctx.username, &ctx.room_id);
+        let key = UserAndRoom(&ctx.username, &ctx.room.room_id.as_str());
         let result = ctx.db.variables.get_user_variables(&key);
 
         let value = match result {
@@ -48,7 +48,7 @@ impl Command for GetVariableCommand {
 
     async fn execute(&self, ctx: &Context<'_>) -> Execution {
         let name = &self.0;
-        let key = UserAndRoom(&ctx.username, &ctx.room_id);
+        let key = UserAndRoom(&ctx.username, &ctx.room.room_id.as_str());
         let result = ctx.db.variables.get_user_variable(&key, name);
 
         let value = match result {
@@ -74,7 +74,7 @@ impl Command for SetVariableCommand {
     async fn execute(&self, ctx: &Context<'_>) -> Execution {
         let name = &self.0;
         let value = self.1;
-        let key = UserAndRoom(&ctx.username, ctx.room_id);
+        let key = UserAndRoom(&ctx.username, ctx.room.room_id.as_str());
         let result = ctx.db.variables.set_user_variable(&key, name, value);
 
         let content = match result {
@@ -98,7 +98,7 @@ impl Command for DeleteVariableCommand {
 
     async fn execute(&self, ctx: &Context<'_>) -> Execution {
         let name = &self.0;
-        let key = UserAndRoom(&ctx.username, ctx.room_id);
+        let key = UserAndRoom(&ctx.username, ctx.room.room_id.as_str());
         let result = ctx.db.variables.delete_user_variable(&key, name);
 
         let value = match result {

src/context.rs

@@ -1,5 +1,6 @@
 use crate::db::Database;
 use matrix_sdk::Client;
+use matrix_sdk::Room;
 
 /// A context carried through the system providing access to things
 /// like the database.
@@ -7,7 +8,7 @@ use matrix_sdk::Client;
 pub struct Context<'a> {
     pub db: Database,
     pub matrix_client: &'a Client,
-    pub room_id: &'a str,
+    pub room: &'a Room,
     pub username: &'a str,
     pub message_body: &'a str,
 }

src/cthulhu/dice.rs

@@ -343,6 +343,14 @@ mod tests {
     use crate::db::Database;
     use crate::parser::{Amount, Element, Operator};
 
+    /// Create a dummy room instance.
+    fn dummy_room() -> matrix_sdk::Room {
+        matrix_sdk::Room::new(
+            &matrix_sdk::identifiers::room_id!("!fakeroomid:example.com"),
+            &matrix_sdk::identifiers::user_id!("@fakeuserid:example.com"),
+        )
+    }
+
     /// Generate a series of numbers manually for testing. For this
     /// die system, the first roll in the Vec should be the unit roll,
     /// and any subsequent rolls should be the tens place roll. The
@@ -383,7 +391,7 @@ mod tests {
         let ctx = Context {
             db: db,
             matrix_client: &matrix_sdk::Client::new("https://example.com").unwrap(),
-            room_id: "roomid",
+            room: &dummy_room(),
             username: "username",
             message_body: "message",
         };

src/db/rooms.rs

@@ -1,5 +1,6 @@
 use crate::db::errors::DataError;
 use crate::db::schema::convert_u64;
+use crate::models::RoomInfo;
 use byteorder::BigEndian;
 use log::{debug, error, log_enabled};
 use sled::transaction::TransactionalTree;
@@ -14,7 +15,8 @@ use zerocopy::AsBytes;
 
 #[derive(Clone)]
 pub struct Rooms {
-    /// Room ID -> RoomInfo struct (single entries)
+    /// Room ID -> RoomInfo struct (single entries).
+    /// Key is just room ID as bytes.
     pub(in crate::db) roomid_roominfo: Tree,
 
     /// Room ID -> list of usernames in room.
@@ -225,6 +227,25 @@ impl Rooms {
         }
     }
 
+    pub fn insert_room_info(&self, info: &RoomInfo) -> Result<(), DataError> {
+        let key = info.room_id.as_bytes();
+        let serialized = bincode::serialize(&info)?;
+        self.roomid_roominfo.insert(key, serialized)?;
+        Ok(())
+    }
+
+    pub fn get_room_info(&self, room_id: &str) -> Result<Option<RoomInfo>, DataError> {
+        let key = room_id.as_bytes();
+
+        let room_info: Option<RoomInfo> = self
+            .roomid_roominfo
+            .get(key)?
+            .map(|bytes| bincode::deserialize(&bytes))
+            .transpose()?;
+
+        Ok(room_info)
+    }
+
     pub fn get_rooms_for_user(&self, username: &str) -> Result<HashSet<String>, DataError> {
         hashset_tree::get_set(&self.username_roomids, username.as_bytes())
     }
@@ -357,7 +378,71 @@ mod tests {
     }
 
     #[test]
-    fn clear_info() {
+    fn insert_room_info_works() {
+        let rooms = create_test_instance();
+
+        let info = RoomInfo {
+            room_id: matrix_sdk::identifiers::room_id!("!fakeroom:example.com")
+                .as_str()
+                .to_owned(),
+            room_name: "fake room name".to_owned(),
+        };
+
+        rooms
+            .insert_room_info(&info)
+            .expect("Could insert room info");
+
+        let found_info = rooms
+            .get_room_info("!fakeroom:example.com")
+            .expect("Error loading room info");
+
+        assert!(found_info.is_some());
+        assert_eq!(info, found_info.unwrap());
+    }
+
+    #[test]
+    fn insert_room_info_updates_data() {
+        let rooms = create_test_instance();
+
+        let mut info = RoomInfo {
+            room_id: matrix_sdk::identifiers::room_id!("!fakeroom:example.com")
+                .as_str()
+                .to_owned(),
+            room_name: "fake room name".to_owned(),
+        };
+
+        rooms
+            .insert_room_info(&info)
+            .expect("Could insert room info");
+
+        //Update info to have a new room name before inserting again.
+        info.room_name = "new fake room name".to_owned();
+
+        rooms
+            .insert_room_info(&info)
+            .expect("Could insert room info");
+
+        let found_info = rooms
+            .get_room_info("!fakeroom:example.com")
+            .expect("Error loading room info");
+
+        assert!(found_info.is_some());
+        assert_eq!(info, found_info.unwrap());
+    }
+
+    #[test]
+    fn get_room_info_none_when_room_does_not_exist() {
+        let rooms = create_test_instance();
+
+        let found_info = rooms
+            .get_room_info("!fakeroom:example.com")
+            .expect("Error loading room info");
+
+        assert!(found_info.is_none());
+    }
+
+    #[test]
+    fn clear_info_modifies_removes_requested_room() {
         let rooms = create_test_instance();
 
         rooms

src/dice.rs

@@ -9,7 +9,7 @@ use futures::stream::{self, StreamExt, TryStreamExt};
 //New hotness
 pub async fn calculate_dice_amount(amounts: &[Amount], ctx: &Context<'_>) -> Result<i32, BotError> {
     let stream = stream::iter(amounts);
-    let key = UserAndRoom(&ctx.username, &ctx.room_id);
+    let key = UserAndRoom(&ctx.username, ctx.room.room_id.as_str());
     let variables = &ctx.db.variables.get_user_variables(&key)?;
 
     use DiceRollingError::VariableNotFound;

src/lib.rs

@@ -9,6 +9,7 @@ pub mod db;
 pub mod dice;
 pub mod error;
 mod help;
+pub mod logic;
 pub mod matrix;
 pub mod models;
 mod parser;

src/logic.rs

@@ -0,0 +1,30 @@
+use crate::db::errors::DataError;
+use crate::matrix;
+use crate::models::RoomInfo;
+use matrix_sdk::{self, Client, Room};
+
+/// Record the information about a room, including users in it.
+pub async fn record_room_information(
+    client: &Client,
+    db: &crate::db::Database,
+    room: &Room,
+    our_username: &str,
+) -> Result<(), DataError> {
+    let room_id_str = room.room_id.as_str();
+    let usernames = matrix::get_users_in_room(&client, &room.room_id).await;
+
+    let info = RoomInfo {
+        room_id: room_id_str.to_owned(),
+        room_name: room.display_name(),
+    };
+
+    // TODO this and the username adding should be one whole
+    // transaction in the db.
+    db.rooms.insert_room_info(&info)?;
+
+    usernames
+        .into_iter()
+        .filter(|username| username != our_username)
+        .map(|username| db.rooms.add_user_to_room(&username, room_id_str))
+        .collect() //Make use of collect impl on Result.
+}

src/models.rs

@@ -1,4 +1,7 @@
+use serde::{Deserialize, Serialize};
+
 /// RoomInfo has basic metadata about a room: its name, ID, etc.
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
 pub struct RoomInfo {
     pub room_id: String,
     pub room_name: String,