use anyhow::{bail, Context, Result};
use crate::core::Core;
use lazy_static::lazy_static;
use regex::Regex;
use sedregex::ReplaceCommand;
use std::borrow::Cow;
lazy_static! {
static ref RE_USERNAME: Regex = Regex::new(r"^@[a-zA-Z][a-zA-Z0-9_]+$").unwrap();
static ref RE_LINK: Regex = Regex::new(r"^https?://[a-zA-Z.0-9-]+/[-_a-zA-Z.:0-9/?=]+$").unwrap();
static ref RE_IV_HASH: Regex = Regex::new(r"^[a-f0-9]{14}$").unwrap();
}
pub async fn start(core: &Core, sender: telegram_bot::UserId) -> Result<()> {
core.send("We are open. Probably. Visit [channel](https://t.me/rsstg_bot_help/3) for details.", Some(sender), None).await?;
Ok(())
}
pub async fn list(core: &Core, sender: telegram_bot::UserId) -> Result<()> {
core.send(core.list(sender).await?, Some(sender), Some(telegram_bot::types::ParseMode::MarkdownV2)).await?;
Ok(())
}
pub async fn command(core: &Core, sender: telegram_bot::UserId, command: Vec<&str>) -> Result<()> {
if command.len() >= 2 {
let msg: Cow<str> = match &command[1].parse::<i32>() {
Err(err) => format!("I need a number.\n{}", &err).into(),
Ok(number) => match command[0] {
"/check" => core.check(number, sender, false).await
.context("Channel check failed.")?,
"/clean" => core.clean(number, sender).await?,
"/enable" => core.enable(number, sender).await?.into(),
"/delete" => core.delete(number, sender).await?,
"/disable" => core.disable(number, sender).await?.into(),
_ => bail!("Command {} not handled.", &command[0]),
},
};
core.send(msg, Some(sender), None).await?;
} else {
core.send("This command needs a number.", Some(sender), None).await?;
}
Ok(())
}
pub async fn update(core: &Core, sender: telegram_bot::UserId, command: Vec<&str>) -> Result<()> {
let mut source_id: Option<i32> = None;
let at_least = "Requires at least 3 parameters.";
let mut i_command = command.iter();
let first_word = i_command.next().context(at_least)?;
match *first_word {
"/update" => {
let next_word = i_command.next().context(at_least)?;
source_id = Some(next_word.parse::<i32>()
.context(format!("I need a number, but got {}.", next_word))?);
},
"/add" => {},
_ => bail!("Passing {} is not possible here.", first_word),
};
let (channel, url, iv_hash, url_re) = (
i_command.next().context(at_least)?,
i_command.next().context(at_least)?,
i_command.next(),
i_command.next());
if ! RE_USERNAME.is_match(channel) {
bail!("Usernames should be something like \"@\\[a\\-zA\\-Z]\\[a\\-zA\\-Z0\\-9\\_]+\", aren't they?\nNot {:?}", &channel);
};
if ! RE_LINK.is_match(url) {
bail!("Link should be a link to atom/rss feed, something like \"https://domain/path\".\nNot {:?}", &url);
}
let iv_hash = match iv_hash {
Some(hash) => {
match *hash {
"-" => None,
thing => {
if ! RE_IV_HASH.is_match(thing) {
bail!("IV hash should be 14 hex digits.\nNot {:?}", thing);
};
Some(thing)
},
}
},
None => None,
};
let url_re = match url_re {
Some(re) => {
match *re {
"-" => None,
thing => {
let _url_rex = ReplaceCommand::new(thing).context("Regexp parsing error:")?;
Some(thing)
}
}
},
None => None,
};
let channel_id = i64::from(core.request(telegram_bot::GetChat::new(telegram_bot::ChatRef::ChannelUsername(channel.to_string()))).await?.id());
let chan_adm = core.request(telegram_bot::GetChatAdministrators::new(telegram_bot::ChatRef::ChannelUsername(channel.to_string()))).await
.context("Sorry, I have no access to that chat.")?;
let (mut me, mut user) = (false, false);
for admin in chan_adm {
if admin.user.id == core.my.id {
me = true;
};
if admin.user.id == sender {
user = true;
};
};
if ! me { bail!("I need to be admin on that channel."); };
if ! user { bail!("You should be admin on that channel."); };
core.send(core.update(source_id, channel, channel_id, url, iv_hash, url_re, sender).await?, Some(sender), None).await?;
Ok(())
}