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Simplify examples/dispatching2_features.rs

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Hirrolot 2022-02-05 00:53:55 +06:00
parent 108d7b7d94
commit d4a4719b58
2 changed files with 43 additions and 50 deletions
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1
README.md
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@ -84,6 +84,7 @@ tokio = { version = "1.8", features = ["rt-multi-thread", "macros"] }
This bot replies with a dice throw to each received message:
([Full](examples/dices.rs))
```rust,no_run
use teloxide::prelude2::*;

92
examples/dispatching2_features.rs
View file

@ -1,64 +1,62 @@
//! This example provide quick overview of the new features in the
//! `dispatching2` module.
// This example provide a quick overview of the new features in the
// `dispatching2` module.
use rand::Rng;
/// Note that you need to import `prelude2` because `prelude` contains
/// items from the old dispatching system (it may change in future versions).
use teloxide::prelude2::*;
use teloxide::{types::Update, utils::command::BotCommand};
// You need to import `prelude2` because `prelude` contains items from the old
// dispatching system, which will be deprecated in the future.
use teloxide::{
prelude2::*,
types::{Dice, Update},
utils::command::BotCommand,
};
#[tokio::main]
async fn main() {
// Start you main as early: start logging, create bot, etc.
teloxide::enable_logging!();
log::info!("Starting dispatching2_features_bot...");
let bot = Bot::from_env().auto_send();
let parameters = ConfigParameters {
bot_maintainer: 268486177, // Paste your ID if you run this bot.
bot_maintainer: 268486177, // Paste your ID to run this bot.
maintainer_username: None,
};
let handler = Update::filter_message()
// Branch is a special method that allow you to handle update several ways.
// You can use branching to define multiple ways in which an update will be handled. If the
// first branch fails, an update will be passed to the second branch, and so on.
.branch(
// Filter allow you to filter updates by some condition.
dptree::filter(
|msg: Message| msg.chat.is_group() || msg.chat.is_supergroup(),
)
// Endpoint is a last message handler.
.endpoint(|msg: Message, bot: AutoSend<Bot>| async move {
log::info!("Received message from the group chat.");
bot.send_message(msg.chat.id, "This is a group chat.").await?;
respond(())
}),
)
// Note that we cannot filter messages from public chats in the next branch,
// because they all is handled by previous branch.
.branch(
// There are some `filter` functions on message, that filters events. This
// filter will filter only messages with dices.
Message::filter_dice().endpoint(|msg: Message, bot: AutoSend<Bot>| async move {
bot.send_message(msg.chat.id, "This is a dice!")
.reply_to_message_id(msg.id)
.await?;
Ok(())
}),
// Filtering allow you to filter updates by some condition.
dptree::filter(|msg: Message| msg.chat.is_group() || msg.chat.is_supergroup())
// An endpoint is the last update handler.
.endpoint(|msg: Message, bot: AutoSend<Bot>| async move {
log::info!("Received a message from a group chat.");
bot.send_message(msg.chat.id, "This is a group chat.").await?;
respond(())
}),
)
.branch(
// If you do not like photos, you can break their handling like that.
Message::filter_photo().endpoint(|| async move { Ok(()) }),
// There are some extension filtering functions on `Message`. The following filter will
// filter only messages with dices.
Message::filter_dice().endpoint(
|msg: Message, dice: Dice, bot: AutoSend<Bot>| async move {
bot.send_message(msg.chat.id, format!("Dice value: {}", dice.value))
.reply_to_message_id(msg.id)
.await?;
Ok(())
},
),
)
.branch(
dptree::entry()
// This method allows to parse text messages commands.
// Filter commands: the next handlers will receive a parsed `SimpleCommand`.
.filter_command::<SimpleCommand>()
// Next we can add `SimpleCommand` in the argument of endpoint. If
// command parsing fails, this endpoint will not be called.
// If a command parsing fails, this handler will not be executed.
.endpoint(simple_commands_handler),
)
.branch(
// Filter maintainer by used ID.
// Filter a maintainer by a used ID.
dptree::filter(|msg: Message, cfg: ConfigParameters| {
msg.from().map(|user| user.id == cfg.bot_maintainer).unwrap_or_default()
})
@ -71,7 +69,6 @@ async fn main() {
let value: u64 = rng.gen_range(from..=to);
bot.send_message(msg.chat.id, value.to_string()).await?;
Ok(())
}
}
@ -79,23 +76,18 @@ async fn main() {
),
);
// Start create dispatcher.
Dispatcher::builder(bot, handler)
// You can specify dependencies to that you have access inside of handlers. It may be
// configs, connection to Database, or dialogue storage (see more in the dialogue_bot
// example). It is similar to the `actix_web::Extensions`.
// Here you specify initial dependencies that all handlers will receive; they can be
// database connections, configurations, and other auxiliary arguments. It is similar to
// `actix_web::Extensions`.
.dependencies(dptree::deps![parameters])
// Now handlers don't use streams. Instead handler is special constructs from `dptree`
// library. Any `*_handler` accepts function `Fn(UpdateHandler) -> UpdateHandler`
// which is builder for the handlers. Note that you _must_ use it instead of using
// `dptree` methods forward.
// If no handler succeeded to handle an update, this closure will be called.
.default_handler(|upd| async move {
// This handler handles updates that do not handled by other handlers.
log::warn!("Unhandled update: {:?}", upd);
})
// If `Result::Err` returns from the dispatcher, it goes here.
// If the dispatcher fails for some reason, execute this handler.
.error_handler(LoggingErrorHandler::with_custom_text(
"Error has occurred in the dispatcher",
"An error has occurred in the dispatcher",
))
.build()
.setup_ctrlc_handler()
@ -109,7 +101,6 @@ struct ConfigParameters {
maintainer_username: Option<String>,
}
// We do not change BotCommand api.
#[derive(BotCommand, Clone)]
#[command(rename = "lowercase", description = "Simple commands")]
enum SimpleCommand {
@ -155,6 +146,7 @@ async fn simple_commands_handler(
format!("{}", msg.from().unwrap().id)
}
};
bot.send_message(msg.chat.id, text).await?;
Ok(())