OpenSource/teloxide
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Update README.md

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Temirkhan Myrzamadi 2020-07-08 05:35:45 +06:00
parent 31ac9bd984
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README.md
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@ -129,7 +129,10 @@ async fn main() {
</div>
### Commands
Commands are defined similar to how we define CLI using [structopt](https://docs.rs/structopt/0.3.9/structopt/). This bot says "I am a cat! Meow!" on `/meow`, generates a random number within [0; 1) on `/generate`, and shows the usage guide on `/help`:
Commands are defined similar to how we define CLI using [structopt] and JSON structures in [serde-json]. The following bot accepts either `/username YourUsername`, `/usernameandage YourUsername YourAge` and shows the usage guide on `/help`:
[structopt]: https://docs.rs/structopt/0.3.9/structopt/
[serde-json]: https://github.com/serde-rs/json
([Full](https://github.com/teloxide/teloxide/blob/master/examples/simple_commands_bot/src/main.rs))
```rust
@ -140,24 +143,31 @@ Commands are defined similar to how we define CLI using [structopt](https://docs
enum Command {
#[command(description = "display this text.")]
Help,
#[command(description = "be a cat.")]
Meow,
#[command(description = "generate a random number within [0; 1).")]
Generate,
}
fn generate() -> String {
thread_rng().gen_range(0.0, 1.0).to_string()
#[command(description = "handle a username.")]
Username(String),
#[command(
description = "handle a username and an age.",
parse_with = "split"
)]
UsernameAndAge { username: String, age: u8 },
}
async fn answer(
cx: DispatcherHandlerCx<Message>,
cx: UpdateWithCx<Message>,
command: Command,
) -> ResponseResult<()> {
match command {
Command::Help => cx.answer(Command::descriptions()).send().await?,
Command::Generate => cx.answer(generate()).send().await?,
Command::Meow => cx.answer("I am a cat! Meow!").send().await?,
Command::Username(username) => {
cx.answer_str(format!("Your username is @{}.", username)).await?
}
Command::UsernameAndAge { username, age } => {
cx.answer_str(format!(
"Your username is @{} and age is {}.",
username, age
))
.await?
}
};
Ok(())
@ -165,7 +175,7 @@ async fn answer(
async fn handle_commands(rx: DispatcherHandlerRx<Message>) {
rx.commands::<Command, &str>(panic!("Insert here your bot's name"))
.for_each_concurrent(None, |(cx, command, _)| async move {
.for_each_concurrent(None, |(cx, command)| async move {
answer(cx, command).await.log_on_error().await;
})
.await;
@ -184,14 +194,6 @@ async fn main() {
<br/><br/>
</div>
See? The dispatcher gives us a stream of messages, so we can handle it as we want! Here we use our `.commands::<Command>()` and [`.for_each_concurrent()`](https://docs.rs/futures/0.3.4/futures/stream/trait.StreamExt.html#method.for_each_concurrent), but others are also available:
- [`.filter()`](https://docs.rs/futures/0.3.4/futures/stream/trait.StreamExt.html#method.filter) / [`.filter_map()`](https://docs.rs/futures/0.3.4/futures/stream/trait.StreamExt.html#method.filter_map) to filter certain kinds of updates;
- [`.inspect()`](https://docs.rs/futures/0.3.4/futures/stream/trait.StreamExt.html#method.inspect) for debugging purposes;
- [`.for_each_concurrent()`](https://docs.rs/futures/0.3.4/futures/stream/trait.StreamExt.html#method.for_each_concurrent) + [`tokio::sync::watch`](https://docs.rs/tokio/0.2.13/tokio/sync/watch/index.html) to register multiple handlers;
- [`.text_messages()`](https://docs.rs/teloxide/0.2.0/teloxide/dispatching/trait.DispatcherHandlerRxExt.html#tymethod.text_messages) to receive only text messages;
- ... And lots of [others](https://docs.rs/futures/0.3.4/futures/stream/trait.StreamExt.html) and [others](https://docs.rs/teloxide/latest/teloxide/dispatching/trait.DispatcherHandlerRxExt.html) and [others](https://docs.rs/tokio/0.2.13/tokio/sync/index.html)!
### Dialogues
Wanna see more? This is how dialogues management is made in teloxide.