10c25017bb 2021-11-13 1: use crate::core::Core;
a2880e5100 2025-04-19 2:
e624ef9d66 2025-04-20 3: use lazy_static::lazy_static;
e624ef9d66 2025-04-20 4: use regex::Regex;
e624ef9d66 2025-04-20 5: use sedregex::ReplaceCommand;
44575a91d3 2025-07-09 6: use stacked_errors::{
44575a91d3 2025-07-09 7: Result,
44575a91d3 2025-07-09 8: StackableErr,
44575a91d3 2025-07-09 9: bail,
44575a91d3 2025-07-09 10: };
bb89b6fab8 2025-06-15 11: use tgbot::types::{
bb89b6fab8 2025-06-15 12: ChatMember,
bb89b6fab8 2025-06-15 13: ChatUsername,
bb89b6fab8 2025-06-15 14: GetChat,
bb89b6fab8 2025-06-15 15: GetChatAdministrators,
bb89b6fab8 2025-06-15 16: Message,
bb89b6fab8 2025-06-15 17: ParseMode::MarkdownV2,
bb89b6fab8 2025-06-15 18: };
7393d62235 2026-01-07 19: use url::Url;
e624ef9d66 2025-04-20 20:
e624ef9d66 2025-04-20 21: lazy_static! {
fae13a0e55 2025-06-28 22: static ref RE_USERNAME: Regex = Regex::new(r"^@([a-zA-Z][a-zA-Z0-9_]+)$").unwrap();
e624ef9d66 2025-04-20 23: static ref RE_IV_HASH: Regex = Regex::new(r"^[a-f0-9]{14}$").unwrap();
e624ef9d66 2025-04-20 24: }
e624ef9d66 2025-04-20 25:
fabcca1eaf 2026-01-09 26: /// Sends an informational message to the message's chat linking to the bot help channel.
fae13a0e55 2025-06-28 27: pub async fn start (core: &Core, msg: &Message) -> Result<()> {
9c4f09193a 2026-01-09 28: core.tg.send("We are open\\. Probably\\. Visit [channel](https://t.me/rsstg_bot_help/3) for details\\.",
44575a91d3 2025-07-09 29: Some(msg.chat.get_id()), Some(MarkdownV2)).await.stack()?;
fae13a0e55 2025-06-28 30: Ok(())
fae13a0e55 2025-06-28 31: }
fae13a0e55 2025-06-28 32:
fabcca1eaf 2026-01-09 33: /// Send the sender's subscription list to the chat.
fabcca1eaf 2026-01-09 34: ///
fabcca1eaf 2026-01-09 35: /// Retrieves the message sender's user ID, obtains their subscription list from `core`,
fabcca1eaf 2026-01-09 36: /// and sends the resulting reply into the message chat using MarkdownV2.
fae13a0e55 2025-06-28 37: pub async fn list (core: &Core, msg: &Message) -> Result<()> {
fae13a0e55 2025-06-28 38: let sender = msg.sender.get_user_id()
44575a91d3 2025-07-09 39: .stack_err("Ignoring unreal users.")?;
44575a91d3 2025-07-09 40: let reply = core.list(sender).await.stack()?;
9c4f09193a 2026-01-09 41: core.tg.send(reply, Some(msg.chat.get_id()), Some(MarkdownV2)).await.stack()?;
fae13a0e55 2025-06-28 42: Ok(())
fae13a0e55 2025-06-28 43: }
fae13a0e55 2025-06-28 44:
fabcca1eaf 2026-01-09 45: /// Handle channel-management commands that operate on a single numeric source ID.
fabcca1eaf 2026-01-09 46: ///
fabcca1eaf 2026-01-09 47: /// This validates that exactly one numeric argument is provided, performs the requested
fabcca1eaf 2026-01-09 48: /// operation (check, clean, enable, delete, disable) against the database or core,
fabcca1eaf 2026-01-09 49: /// and sends the resulting reply to the chat.
fabcca1eaf 2026-01-09 50: ///
fabcca1eaf 2026-01-09 51: /// # Parameters
fabcca1eaf 2026-01-09 52: ///
fabcca1eaf 2026-01-09 53: /// - `core`: application core containing database and Telegram clients.
fabcca1eaf 2026-01-09 54: /// - `command`: command string (e.g. "/check", "/clean", "/enable", "/delete", "/disable").
fabcca1eaf 2026-01-09 55: /// - `msg`: incoming Telegram message that triggered the command; used to determine sender and chat.
fabcca1eaf 2026-01-09 56: /// - `words`: command arguments; expected to contain exactly one element that parses as a 32-bit integer.
fae13a0e55 2025-06-28 57: pub async fn command (core: &Core, command: &str, msg: &Message, words: &[String]) -> Result<()> {
44575a91d3 2025-07-09 58: let mut conn = core.db.begin().await.stack()?;
fae13a0e55 2025-06-28 59: let sender = msg.sender.get_user_id()
44575a91d3 2025-07-09 60: .stack_err("Ignoring unreal users.")?;
fae13a0e55 2025-06-28 61: let reply = if words.len() == 1 {
fae13a0e55 2025-06-28 62: match words[0].parse::<i32>() {
fae13a0e55 2025-06-28 63: Err(err) => format!("I need a number.\n{}", &err).into(),
fae13a0e55 2025-06-28 64: Ok(number) => match command {
acb0a4ac54 2025-09-28 65: "/check" => core.check(number, false, None).await
fae13a0e55 2025-06-28 66: .context("Channel check failed.")?.into(),
44575a91d3 2025-07-09 67: "/clean" => conn.clean(number, sender).await.stack()?,
44575a91d3 2025-07-09 68: "/enable" => conn.enable(number, sender).await.stack()?.into(),
44575a91d3 2025-07-09 69: "/delete" => conn.delete(number, sender).await.stack()?,
44575a91d3 2025-07-09 70: "/disable" => conn.disable(number, sender).await.stack()?.into(),
fae13a0e55 2025-06-28 71: _ => bail!("Command {command} {words:?} not handled."),
bb89b6fab8 2025-06-15 72: },
bb89b6fab8 2025-06-15 73: }
bb89b6fab8 2025-06-15 74: } else {
fae13a0e55 2025-06-28 75: "This command needs exacly one number.".into()
bb89b6fab8 2025-06-15 76: };
9c4f09193a 2026-01-09 77: core.tg.send(reply, Some(msg.chat.get_id()), None).await.stack()?;
bb89b6fab8 2025-06-15 78: Ok(())
bb89b6fab8 2025-06-15 79: }
bb89b6fab8 2025-06-15 80:
fabcca1eaf 2026-01-09 81: /// Validate command arguments, check permissions and update or add a channel feed configuration in the database.
fabcca1eaf 2026-01-09 82: ///
fabcca1eaf 2026-01-09 83: /// This function parses and validates parameters supplied by a user command (either "/update <id> ..." or "/add ..."),
fabcca1eaf 2026-01-09 84: /// verifies the channel username and feed URL, optionally validates an IV hash and a replacement regexp,
fabcca1eaf 2026-01-09 85: /// ensures both the bot and the command sender are administrators of the target channel, and performs the database update.
fabcca1eaf 2026-01-09 86: ///
fabcca1eaf 2026-01-09 87: /// # Parameters
fabcca1eaf 2026-01-09 88: ///
fabcca1eaf 2026-01-09 89: /// - `command` — the invoked command, expected to be either `"/update"` (followed by a numeric source id) or `"/add"`.
fabcca1eaf 2026-01-09 90: /// - `msg` — the incoming Telegram message; used to derive the command sender and target chat id for the reply.
fabcca1eaf 2026-01-09 91: /// - `words` — the command arguments: for `"/add"` expected `channel url [iv_hash|'-'] [url_re|'-']`; for `"/update"` the first element must be a numeric `source_id` followed by the same parameters.
fae13a0e55 2025-06-28 92: pub async fn update (core: &Core, command: &str, msg: &Message, words: &[String]) -> Result<()> {
bb89b6fab8 2025-06-15 93: let sender = msg.sender.get_user_id()
44575a91d3 2025-07-09 94: .stack_err("Ignoring unreal users.")?;
bb89b6fab8 2025-06-15 95: let mut source_id: Option<i32> = None;
bb89b6fab8 2025-06-15 96: let at_least = "Requires at least 3 parameters.";
fae13a0e55 2025-06-28 97: let mut i_words = words.iter();
fae13a0e55 2025-06-28 98: match command {
bb89b6fab8 2025-06-15 99: "/update" => {
fae13a0e55 2025-06-28 100: let next_word = i_words.next().context(at_least)?;
e624ef9d66 2025-04-20 101: source_id = Some(next_word.parse::<i32>()
e624ef9d66 2025-04-20 102: .context(format!("I need a number, but got {next_word}."))?);
e624ef9d66 2025-04-20 103: },
e624ef9d66 2025-04-20 104: "/add" => {},
fae13a0e55 2025-06-28 105: _ => bail!("Passing {command} is not possible here."),
e624ef9d66 2025-04-20 106: };
e624ef9d66 2025-04-20 107: let (channel, url, iv_hash, url_re) = (
fae13a0e55 2025-06-28 108: i_words.next().context(at_least)?,
fae13a0e55 2025-06-28 109: i_words.next().context(at_least)?,
fae13a0e55 2025-06-28 110: i_words.next(),
fae13a0e55 2025-06-28 111: i_words.next());
fae13a0e55 2025-06-28 112: /*
fae13a0e55 2025-06-28 113: let channel = match RE_USERNAME.captures(channel) {
fae13a0e55 2025-06-28 114: Some(caps) => match caps.get(1) {
fae13a0e55 2025-06-28 115: Some(data) => data.as_str(),
fae13a0e55 2025-06-28 116: None => bail!("No string found in channel name"),
fae13a0e55 2025-06-28 117: },
fae13a0e55 2025-06-28 118: None => {
fae13a0e55 2025-06-28 119: bail!("Usernames should be something like \"@\\[a\\-zA\\-Z]\\[a\\-zA\\-Z0\\-9\\_]+\", aren't they?\nNot {channel:?}");
fae13a0e55 2025-06-28 120: },
fae13a0e55 2025-06-28 121: };
fae13a0e55 2025-06-28 122: */
e624ef9d66 2025-04-20 123: if ! RE_USERNAME.is_match(channel) {
e624ef9d66 2025-04-20 124: bail!("Usernames should be something like \"@\\[a\\-zA\\-Z]\\[a\\-zA\\-Z0\\-9\\_]+\", aren't they?\nNot {channel:?}");
e624ef9d66 2025-04-20 125: };
7393d62235 2026-01-07 126: {
7393d62235 2026-01-07 127: let parsed_url = Url::parse(url)
7393d62235 2026-01-07 128: .stack_err("Expecting a valid link to ATOM/RSS feed.")?;
7393d62235 2026-01-07 129: match parsed_url.scheme() {
7393d62235 2026-01-07 130: "http" | "https" => {},
7393d62235 2026-01-07 131: scheme => {
7393d62235 2026-01-07 132: bail!("Unsupported URL scheme: {scheme}");
7393d62235 2026-01-07 133: },
7393d62235 2026-01-07 134: };
e624ef9d66 2025-04-20 135: }
e624ef9d66 2025-04-20 136: let iv_hash = match iv_hash {
e624ef9d66 2025-04-20 137: Some(hash) => {
bb89b6fab8 2025-06-15 138: match hash.as_ref() {
e624ef9d66 2025-04-20 139: "-" => None,
e624ef9d66 2025-04-20 140: thing => {
e624ef9d66 2025-04-20 141: if ! RE_IV_HASH.is_match(thing) {
e624ef9d66 2025-04-20 142: bail!("IV hash should be 14 hex digits.\nNot {thing:?}");
613a665847 2021-11-15 143: };
613a665847 2021-11-15 144: Some(thing)
613a665847 2021-11-15 145: },
c1e27b74ed 2021-11-13 146: }
10c25017bb 2021-11-13 147: },
10c25017bb 2021-11-13 148: None => None,
10c25017bb 2021-11-13 149: };
10c25017bb 2021-11-13 150: let url_re = match url_re {
10c25017bb 2021-11-13 151: Some(re) => {
bb89b6fab8 2025-06-15 152: match re.as_ref() {
c1e27b74ed 2021-11-13 153: "-" => None,
613a665847 2021-11-15 154: thing => {
613a665847 2021-11-15 155: let _url_rex = ReplaceCommand::new(thing).context("Regexp parsing error:")?;
613a665847 2021-11-15 156: Some(thing)
613a665847 2021-11-15 157: }
c1e27b74ed 2021-11-13 158: }
10c25017bb 2021-11-13 159: },
10c25017bb 2021-11-13 160: None => None,
10c25017bb 2021-11-13 161: };
fae13a0e55 2025-06-28 162: let chat_id = ChatUsername::from(channel.as_ref());
9c4f09193a 2026-01-09 163: let channel_id = core.tg.client.execute(GetChat::new(chat_id.clone())).await.stack_err("gettting GetChat")?.id;
9c4f09193a 2026-01-09 164: let chan_adm = core.tg.client.execute(GetChatAdministrators::new(chat_id)).await
bb89b6fab8 2025-06-15 165: .context("Sorry, I have no access to that chat.")?;
10c25017bb 2021-11-13 166: let (mut me, mut user) = (false, false);
10c25017bb 2021-11-13 167: for admin in chan_adm {
e624ef9d66 2025-04-20 168: let member_id = match admin {
e624ef9d66 2025-04-20 169: ChatMember::Creator(member) => member.user.id,
e624ef9d66 2025-04-20 170: ChatMember::Administrator(member) => member.user.id,
e624ef9d66 2025-04-20 171: ChatMember::Left(_)
e624ef9d66 2025-04-20 172: | ChatMember::Kicked(_)
bb89b6fab8 2025-06-15 173: | ChatMember::Member{..}
e624ef9d66 2025-04-20 174: | ChatMember::Restricted(_) => continue,
bb89b6fab8 2025-06-15 175: };
9c4f09193a 2026-01-09 176: if member_id == core.tg.me.id {
e624ef9d66 2025-04-20 177: me = true;
bb89b6fab8 2025-06-15 178: }
e624ef9d66 2025-04-20 179: if member_id == sender {
e624ef9d66 2025-04-20 180: user = true;
bb89b6fab8 2025-06-15 181: }
10c25017bb 2021-11-13 182: };
10c25017bb 2021-11-13 183: if ! me { bail!("I need to be admin on that channel."); };
10c25017bb 2021-11-13 184: if ! user { bail!("You should be admin on that channel."); };
44575a91d3 2025-07-09 185: let mut conn = core.db.begin().await.stack()?;
fabcca1eaf 2026-01-09 186: let update = conn.update(source_id, channel, channel_id, url, iv_hash, url_re, sender).await.stack()?;
fabcca1eaf 2026-01-09 187: core.tg.send(update, Some(msg.chat.get_id()), None).await.stack()?;
a7f91033c0 2021-11-13 188: Ok(())
9171c791eb 2021-11-13 189: }