Added support for resolving room aliases to room ids and persisting this lookup in the config file

Cargo.toml

@@ -11,6 +11,7 @@ serde = "1.0.144"
 serde_yaml = "0.9.10"
 
 postbus = "0.2.0"
+ruma = "0.6.4"
 matrix-sdk = "0.5.0"
 
 [target.x86_64-unknown-linux-musl.dependencies]

advanced_sample_config.yaml

@@ -23,4 +23,4 @@ mappings:
     room_id: "!idofWARNINGroomyoucreatedbefore:example.com"
   - to: "critical@mydomain.com"
     sender_mxid: "@firstbot:example.com"
-    room'id: "!idofIMPORTANTroomyoucreatedbefore:example.com"
+    room_id: "#IMPORTANTroomyoucreatedbefore:example.com"

src/config.rs

@@ -24,6 +24,7 @@ pub struct Mapping {
     pub to: Option<String>,
     pub mxid_sender: Option<String>,
     pub room_id: String,
+    pub room_alias: Option<String>,
 }
 
 pub fn load_config(file_path: &str) -> Config {

src/matrix.rs

@@ -1,10 +1,12 @@
 use matrix_sdk::{Client, ruma::{UserId, RoomId, events::{room::message::RoomMessageEventContent}}, Session, room::Room, config::SyncSettings};
+use ruma::OwnedRoomAliasId;
 use postbus::command::Mailbox;
 use crate::config::{Mapping, Config};
 
 pub async fn get_clients(config: &mut Config) -> Vec<Client> {
     let mut clients: Vec<Client> = vec![];
 
+    let mut room_aliases_resolved = false;
     // Try to build a matrix_sdk::Client object for each configured client
     for conf in &mut config.clients {
         let user_id = match UserId::parse(&conf.mxid) {
@@ -44,6 +46,28 @@ pub async fn get_clients(config: &mut Config) -> Vec<Client> {
             conf.access_token = Some(session.access_token);
             conf.device_id = Some(session.device_id.to_string());
         }
+        // If room aliases are supplied as room_id in the config file, resolve them and store the pairs properly
+        if !room_aliases_resolved && client.logged_in().await {
+            for mapping in &mut config.mappings {
+                if mapping.room_id.as_str().chars().nth(0).unwrap() == '#' || mapping.room_id.len() == 0 {
+                    // TODO: Clean this up once matrix-rust-sdk 0.6.0 is available
+                    let alias: OwnedRoomAliasId = match OwnedRoomAliasId::try_from(mapping.room_id.as_str()) {
+                        Ok(a) => a,
+                        Err(_e) => continue,
+                    };
+                    let resolve_request = matrix_sdk::ruma::api::client::alias::get_alias::v3::Request::new(&alias);
+                    match client.send(resolve_request, None).await {
+                        Ok(result) => {
+                            let matrix_sdk::ruma::api::client::alias::get_alias::v3::Response{room_id, ..} = result;
+                            mapping.room_alias = Some(mapping.room_id.clone());
+                            mapping.room_id = room_id.to_string();
+                        },
+                        Err(_e) => (),
+                    };
+                }let a = ruma::RoomAliasId::parse(&String::from("abc"));
+            }
+            room_aliases_resolved = true;
+        }
         
         clients.push(client.clone());
     }