error_handling/
error_handling.rs

1use telebot::{Bot, File};
2use failure::Error;
3use futures::stream::Stream;
4use futures::Future;
5use std::env;
6
7// import all available functions
8use telebot::functions::*;
9
10fn main() {
11    // Create the bot
12    let mut bot = Bot::new(&env::var("TELEGRAM_BOT_KEY").unwrap()).update_interval(200);
13
14    // Register a location command which will send a location to requests like /location 2.321 12.32
15    enum LocationErr {
16        Telegram(Error),
17        WrongLocationFormat,
18    }
19
20    let handle = bot.new_cmd("/location")
21        .then(|result| {
22            let (bot, mut msg) = result.expect("Strange telegram error!");
23
24            if let Some(pos) = msg.text.take() {
25                let mut elms = pos.split_whitespace().take(2).filter_map(
26                    |x| x.parse::<f32>().ok(),
27                );
28
29                if let (Some(a), Some(l)) = (elms.next(), elms.next()) {
30                    return Ok((bot, msg, a, l));
31                }
32            }
33
34            return Err((bot, msg, LocationErr::WrongLocationFormat));
35        })
36        .and_then(|(bot, msg, long, alt)| {
37            bot.location(msg.chat.id, long, alt).send().map_err(|err| {
38                (bot, msg, LocationErr::Telegram(err))
39            })
40        })
41        .or_else(|(bot, msg, err)| {
42            let text = {
43                match err {
44                    LocationErr::Telegram(err) => format!("Telegram error: {:?}", err),
45                    LocationErr::WrongLocationFormat => "Couldn't parse the location!".into(),
46                }
47            };
48
49            bot.message(msg.chat.id, text).send()
50        })
51        .for_each(|_| Ok(()));
52
53    // Register a get_my_photo command which will send the own profile photo to the chat
54    enum PhotoErr {
55        Telegram(Error),
56        NoPhoto,
57    }
58
59    let handle2 = bot.new_cmd("/get_my_photo")
60        .then(|result| {
61            let (bot, msg) = result.expect("Strange telegram error!");
62
63            let user_id = msg.from.clone().unwrap().id;
64
65            bot.get_user_profile_photos(user_id)
66                .limit(1u32)
67                .send()
68                .then(|result| match result {
69                    Ok((bot, photos)) => {
70                        if photos.total_count == 0 {
71                            return Err((bot, msg, PhotoErr::NoPhoto));
72                        }
73
74                        return Ok((bot, msg, photos.photos[0][0].clone().file_id));
75                    }
76                    Err(err) => Err((bot, msg, PhotoErr::Telegram(err))),
77                })
78        })
79        .and_then(|(bot, msg, file_id)| {
80            bot.photo(msg.chat.id)
81                .file(File::Telegram(file_id))
82                .send()
83                .map_err(|err| (bot, msg, PhotoErr::Telegram(err)))
84        })
85        .or_else(|(bot, msg, err)| {
86            let text = match err {
87                PhotoErr::Telegram(err) => format!("Telegram Error: {:?}", err),
88                PhotoErr::NoPhoto => "No photo exists!".into(),
89            };
90
91            bot.message(msg.chat.id, text).send()
92        })
93        .for_each(|_| Ok(()));
94
95    // enter the main loop
96    bot.run_with(handle.join(handle2));
97}
error_handling/error_handling.rs

error_handling/
error_handling.rs
