Implement !about command

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hebbot"
-version = "0.1.0"
+version = "2.1.0"
 authors = ["Felix Häcker <[email protected]>"]
 edition = "2018"
 

README.md

@@ -31,6 +31,7 @@ In this closed room administrative commands can be executed.
 
 | Command         | Description                                                |
 | --------------- | ---------------------------------------------------------- |
+| !about          | Shows bot version details                                  |
 | !clear          | Clears all stored news                                     |
 | !details "term" | Shows section/project details (term can be emoji or name)  |
 | !list-config    | Lists current bot configuration                            |

src/bot.rs

@@ -606,6 +606,7 @@ impl EventCallback {
         info!("Received command: {} ({})", command, args);
 
         match command {
+            "!about" => self.about_command().await,
             "!clear" => self.clear_command().await,
             "!details" => self.details_command(&args).await,
             "!help" => self.help_command().await,
@@ -622,6 +623,7 @@ impl EventCallback {
 
     async fn help_command(&self) {
         let help = "Available commands: \n\n\
+            !about \n\
             !clear \n\
             !details <name> \n\
             !list-config \n\
@@ -637,6 +639,19 @@ impl EventCallback {
             .await;
     }
 
+    async fn about_command(&self) {
+        let version = env!("CARGO_PKG_VERSION");
+
+        let msg = format!(
+            "You are running Hebbot version {}<br>© 2021 Felix Häcker<br><a href=\"https://github.com/haecker-felix/hebbot/\">Open Homepage</a> | <a href=\"https://github.com/haecker-felix/hebbot/issues/new\">Report Issue</a>",
+            version
+        );
+
+        self.0
+            .send_message(&msg, BotMsgType::AdminRoomHtmlNotice)
+            .await;
+    }
+
     async fn clear_command(&self) {
         let msg = {
             let mut news_store = self.0.news_store.lock().unwrap();