use crate::core::Core;
use anyhow::{
anyhow,
bail,
Context,
Result,
};
use lazy_static::lazy_static;
use regex::Regex;
use sedregex::ReplaceCommand;
use tgbot::types::{
ChatMember,
ChatUsername,
GetChat,
GetChatAdministrators,
Message,
ParseMode::MarkdownV2,
};
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, msg: &Message) -> Result<()> {
core.send("We are open\\. Probably\\. Visit [channel](https://t.me/rsstg_bot_help/3) for details\\.",
Some(msg.chat.get_id()), Some(MarkdownV2)).await?;
Ok(())
}
pub async fn list(core: &Core, msg: &Message) -> Result<()> {
let sender = msg.sender.get_user_id()
.ok_or(anyhow!("Ignoring unreal users."))?;
let reply = core.list(sender).await?;
core.send(reply, Some(msg.chat.get_id()), Some(MarkdownV2)).await?;
Ok(())
}
pub async fn command (core: &Core, msg: &Message, command: &[String]) -> Result<()> {
let mut conn = core.db.begin().await?;
let sender = msg.sender.get_user_id()
.ok_or(anyhow!("Ignoring unreal users."))?;
let reply = if command.len() >= 2 {
match command[1].parse::<i32>() {
Err(err) => format!("I need a number.\n{}", &err).into(),
Ok(number) => match &command[0][..] {
"/check" => core.check(number, false).await
.context("Channel check failed.")?.into(),
"/clean" => conn.clean(number, sender).await?,
"/enable" => conn.enable(number, sender).await?.into(),
"/delete" => conn.delete(number, sender).await?,
"/disable" => conn.disable(number, sender).await?.into(),
_ => bail!("Command {} not handled.", &command[0]),
},
}
} else {
"This command needs a number.".into()
};
core.send(reply, Some(msg.chat.get_id()), None).await?;
Ok(())
}
pub async fn update (core: &Core, msg: &Message, command: &[String]) -> Result<()> {
let sender = msg.sender.get_user_id()
.ok_or(anyhow!("Ignoring unreal users."))?;
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.as_ref() {
"/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 {first_word} is not possible here."),
};
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.as_ref() {
"-" => 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.as_ref() {
"-" => None,
thing => {
let _url_rex = ReplaceCommand::new(thing).context("Regexp parsing error:")?;
Some(thing)
}
}
},
None => None,
};
let chat_id = ChatUsername::from(channel.clone());
let channel_id = core.tg.execute(GetChat::new(chat_id.clone())).await?.id;
let chan_adm = core.tg.execute(GetChatAdministrators::new(chat_id)).await
.context("Sorry, I have no access to that chat.")?;
let (mut me, mut user) = (false, false);
for admin in chan_adm {
let member_id = match admin {
ChatMember::Creator(member) => member.user.id,
ChatMember::Administrator(member) => member.user.id,
ChatMember::Left(_)
| ChatMember::Kicked(_)
| ChatMember::Member{..}
| ChatMember::Restricted(_) => continue,
};
if member_id == core.me.id {
me = true;
}
if member_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."); };
let mut conn = core.db.begin().await?;
core.send(conn.update(source_id, channel, channel_id, url, iv_hash, url_re, sender).await?, Some(msg.chat.get_id()), None).await?;
Ok(())
}