ferrisgram 0.2.1

An elegent rust client for the Telegram Bot API.
Documentation 
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use crate::error::{Error, Result};
use crate::input_file::InputFile;
use crate::types::{ResponseParameters, User};
use crate::DEFAULT_API_URL;
use reqwest::multipart::Form;
use reqwest::Client;
use serde::de::DeserializeOwned;
use serde::{Deserialize, Serialize};
use serde_json::Value;
use std::collections::HashMap;
use std::time::Duration;

#[derive(Debug, Clone)]
pub struct Bot {
    pub token: String,
    pub client: Client,
    pub api_url: String,
    pub user: User,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct ApiResponse<T> {
    pub ok: bool,
    pub error_code: Option<i32>,
    pub description: Option<String>,
    pub result: Option<T>,
    pub parameters: Option<ResponseParameters>,
}

impl Bot {
    pub async fn new(token: &str, api_url: Option<&str>) -> Result<Bot> {
        let mut api = DEFAULT_API_URL;
        if api_url.is_some() {
            api = api_url.unwrap();
        }
        let mut bot = Bot {
            token: String::from(token),
            client: Client::builder()
                .timeout(Duration::from_secs(5 * 60 + 30))
                .connect_timeout(Duration::from_secs(60))
                .build()
                .unwrap(),
            api_url: api.to_string(),
            user: User::new(0, true, String::new()),
        };
        match bot.get_me().send().await {
            Ok(bot_user) => {
                bot.user = bot_user;
                Ok(bot)
            }
            Err(_) => Err(Error::InvalidToken),
        }
    }
    pub async fn get<T: DeserializeOwned>(
        &self,
        method: &str,
        params: Option<&serde_json::Value>,
    ) -> Result<T> {
        loop {
            let mut resp = self.client.get(format!(
                "{url}/bot{token}/{method}",
                url = self.api_url,
                token = self.token,
                method = method
            ));
            if params.is_some() {
                resp = resp.json(&params);
            }
            let resp = resp.send().await?.json::<ApiResponse<T>>().await?;
            if resp.ok {
                return Ok(resp.result.unwrap());
            } else {
                if let Some(resp_params) = resp.parameters {
                    if let Some(retry_after) = resp_params.retry_after {
                        tokio::time::sleep(tokio::time::Duration::from_secs(
                            retry_after.unsigned_abs(),
                        ))
                        .await;
                        continue;
                    }
                }
                return Err(Error::TelegramError(resp.description.unwrap()));
            }
        }
    }
    pub async fn post<T: DeserializeOwned, F: InputFile>(
        &self,
        method: &str,
        params: Option<&serde_json::Value>,
        data: Option<HashMap<&str, F>>,
    ) -> Result<T> {
        loop {
            let mut resp = self.client.post(format!(
                "{url}/bot{token}/{method}",
                url = self.api_url,
                token = self.token,
                method = method
            ));
            // Use multipart if data is not none else use JSON
            if data.is_some() {
                let mut form = Form::new();
                for (name, field) in data.as_ref().unwrap() {
                    form = form.part(name.to_string(), field.get_part())
                }
                if let Value::Object(obj) = params.unwrap().clone() {
                    for (key, val) in obj {
                        if let Value::String(s) = val {
                            form = form.text(key, s);
                        } else {
                            form = form.text(key, val.to_string())
                        }
                    }
                }
                resp = resp.multipart(form);
                // form.part("", part);
            } else if params.is_some() {
                resp = resp.json(&params);
            }
            let resp = resp.send().await?.json::<ApiResponse<T>>().await?;
            if resp.ok {
                return Ok(resp.result.unwrap());
            } else {
                if let Some(resp_params) = resp.parameters {
                    if let Some(retry_after) = resp_params.retry_after {
                        tokio::time::sleep(tokio::time::Duration::from_secs(
                            retry_after.unsigned_abs(),
                        ))
                        .await;
                        continue;
                    }
                }
                return Err(Error::TelegramError(resp.description.unwrap()));
            }
        }
    }
}