Add examples/simple_commands_bot

.gitignore

@@ -8,3 +8,4 @@ examples/dialogue_bot/target
 examples/multiple_handlers_bot/target
 examples/admin_bot/target
 examples/guess_a_number_bot/target
+examples/simple_commands_bot/target

examples/README.md

@@ -1,8 +1,9 @@
 # Examples
 Just enter the directory (for example, `cd dialogue_bot`) and execute `cargo run` to run an example. Don't forget to initialise the `TELOXIDE_TOKEN` environmental variable.
 
-  - [ping_pong_bot](ping_pong_bot) - Just answers "pong" to each incoming message.
+  - [ping_pong_bot](ping_pong_bot) - Answers "pong" to each incoming message.
+  - [simple_commands_bot](simple_commands_bot) - Shows how to deal with bot's commands.
   - [guess_a_number_bot](guess_a_number_bot) - The "guess a number" game.
   - [dialogue_bot](dialogue_bot) - Drive a dialogue with a user using a type-safe finite automaton.
-  - [admin_bot](admin_bot) - Shows how to deal with bot's commands.
+  - [admin_bot](admin_bot) - A bot, which can ban, kick, and mute on a command.
   - [multiple_handlers_bot](multiple_handlers_bot) - Shows how multiple dispatcher's handlers relate to each other.

examples/simple_commands_bot/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "simple_commands_bot"
+version = "0.1.0"
+authors = ["Temirkhan Myrzamadi <hirrolot@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+log = "0.4.8"
+tokio = "0.2.9"
+pretty_env_logger = "0.4.0"
+teloxide = { path = "../../" }

examples/simple_commands_bot/src/main.rs

@@ -0,0 +1,54 @@
+use teloxide::{prelude::*, utils::command::BotCommand};
+
+#[derive(BotCommand)]
+#[command(rename = "lowercase", description = "These commands are supported:")]
+enum Command {
+    #[command(description = "display this text.")]
+    Help,
+    #[command(description = "be a cat.")]
+    Meow,
+    #[command(description = "be a dog.")]
+    Woof,
+    #[command(description = "be a cow.")]
+    Moo,
+}
+
+async fn handle_command(
+    ctx: DispatcherHandlerCtx<Message>,
+) -> Result<(), RequestError> {
+    let text = match ctx.update.text() {
+        Some(text) => text,
+        None => return Ok(()),
+    };
+
+    let command = match Command::parse(text) {
+        Some((command, _)) => command,
+        None => return Ok(()),
+    };
+
+    match command {
+        Command::Help => ctx.answer(Command::descriptions()).send().await?,
+        Command::Meow => ctx.answer("I am a cat! Meow!").send().await?,
+        Command::Woof => ctx.answer("I am a dog! Woof!").send().await?,
+        Command::Moo => ctx.answer("I am a cow! Moo!").send().await?,
+    };
+
+    Ok(())
+}
+
+#[tokio::main]
+async fn main() {
+    run().await;
+}
+
+async fn run() {
+    teloxide::enable_logging!();
+    log::info!("Starting ping_pong_bot!");
+
+    let bot = Bot::from_env();
+
+    Dispatcher::<RequestError>::new(bot)
+        .message_handler(&handle_command)
+        .dispatch()
+        .await;
+}