feat: some fixes, features, and README

.env.example

@@ -1,3 +1,4 @@
 MATRIX_HOMESERVER=https://matrix.org
 MATRIX_USERNAME=your_username
 MATRIX_PASSWORD=your_password
+IGNORE_BRIDGE_USERS=false

README.md

@@ -0,0 +1,42 @@
+# Matrix Wiki Link Bot
+
+A simple Matrix bot that listens for commands starting with `.wiki` and responds with links from a configured JSON store.
+
+## Configuration
+
+The bot is configured via environment variables.
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `MATRIX_HOMESERVER` | The URL of your Matrix homeserver (e.g., `https://matrix.org`). | |
+| `MATRIX_USERNAME` | The bot's Matrix username. | |
+| `MATRIX_PASSWORD` | The bot's Matrix password. | |
+| `IGNORE_BRIDGE_USERS`| If set to `true`, the bot will ignore messages from senders whose MXID starts with `@discord_`. | `false` |
+
+## Usage
+
+### Docker
+
+1.  Copy `docker-compose.example.yml` to `docker-compose.yml` and `links.json` to a local file.
+2.  Update the environment variables in `docker-compose.yml`.
+3.  Populate `links.json` with your key-value pairs.
+4.  Run the bot:
+
+    ```bash
+    docker-compose up -d
+    ```
+
+### Local Development
+
+1.  Copy `.env.example` to `.env`.
+2.  Update `.env` with your credentials.
+3.  Run the bot:
+
+    ```bash
+    cargo run
+    ```
+
+## Commands
+
+- `.wiki list`: Lists all available wiki keys.
+- `.wiki <term>`: Fetches the link associated with `<term>` from the `links.json` file.

docker-compose.example.yml

@@ -5,6 +5,7 @@ services:
       - MATRIX_HOMESERVER=https://matrix.org
       - MATRIX_USERNAME=your_username
       - MATRIX_PASSWORD=your_password
+      - IGNORE_BRIDGE_USERS=false
     volumes:
       - ./links.json:/usr/local/bin/links.json
     restart: unless-stopped

src/links.rs

@@ -17,6 +17,12 @@ impl LinkStore {
     pub fn get(&self, key: &str) -> Option<&String> {
         self.links.get(key)
     }
+
+    pub fn list_keys(&self) -> Vec<String> {
+        let mut keys: Vec<String> = self.links.keys().cloned().collect();
+        keys.sort();
+        keys
+    }
 }
 
 #[cfg(test)]

src/main.rs

@@ -37,20 +37,55 @@ async fn main() -> Result<()> {
 
     client.matrix_auth().login_username(&username, &password).await?;
 
+    let ignore_bridge_users = env::var("IGNORE_BRIDGE_USERS")
+        .map(|v| v.to_lowercase() == "true")
+        .unwrap_or(false);
+
+    let start_time = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .expect("Time went backwards")
+        .as_millis() as u64;
+
     // Share link_store with event handler
     let store_clone = link_store.clone();
     
     client.add_event_handler(move |event: OriginalSyncRoomMessageEvent, room: Room| {
         let store = store_clone.clone();
         async move {
+            let sender = event.sender.as_str();
+            if ignore_bridge_users && sender.starts_with("@discord_") {
+                return;
+            }
+
+            if u64::from(event.origin_server_ts.get()) < start_time {
+                return;
+            }
+
             let RoomMessageEventContent { msgtype, .. } = event.content;
 
             if let MessageType::Text(text_content) = msgtype {
                 let body = text_content.body;
-                if body.starts_with(".wiki ") {
-                    let argument = body.trim_start_matches(".wiki ").trim();
-                    if let Some(link) = store.get(argument) {
-                        let response = format!("Link for {}: {}", argument, link);
+                if body == ".wiki" || body.starts_with(".wiki ") {
+                    let argument = body.trim_start_matches(".wiki").trim();
+                    if argument.is_empty() {
+                         let response = "Use .wiki list to print all available links";
+                         let content = RoomMessageEventContent::text_plain(response);
+                         if let Err(e) = room.send(content).await {
+                             eprintln!("Failed to send message: {}", e);
+                         }
+                    } else if argument == "list" {
+                        let keys = store.list_keys();
+                        let response = if keys.is_empty() {
+                            "No wiki links available.".to_string()
+                        } else {
+                            format!("Available wiki links: {}", keys.join(", "))
+                        };
+                         let content = RoomMessageEventContent::text_plain(response);
+                         if let Err(e) = room.send(content).await {
+                             eprintln!("Failed to send message: {}", e);
+                        }
+                    } else if let Some(link) = store.get(argument) {
+                        let response = format!("Link for {}: {}\n(Use .wiki list to print all available links)", argument, link);
                         // Send response
                         let content = RoomMessageEventContent::text_plain(response);
                         if let Err(e) = room.send(content).await {
@@ -58,7 +93,7 @@ async fn main() -> Result<()> {
                         }
                     } else {
                          // Optional: reply not found, or just ignore
-                         let response = format!("No wiki link found for '{}'", argument);
+                         let response = format!("No wiki link found for '{}'\n(Use .wiki list to print all available links)", argument);
                          let content = RoomMessageEventContent::text_plain(response);
                          if let Err(e) = room.send(content).await {
                              eprintln!("Failed to send message: {}", e);