Lines of
src/command.rs
from check-in fabcca1eaf
that are changed by the sequence of edits moving toward
check-in 13265e7697:
1: use crate::core::Core;
2:
3: use lazy_static::lazy_static;
4: use regex::Regex;
5: use sedregex::ReplaceCommand;
6: use stacked_errors::{
7: Result,
8: StackableErr,
9: bail,
10: };
11: use tgbot::types::{
12: ChatMember,
13: ChatUsername,
14: GetChat,
15: GetChatAdministrators,
16: Message,
17: ParseMode::MarkdownV2,
18: };
19: use url::Url;
20:
21: lazy_static! {
22: static ref RE_USERNAME: Regex = Regex::new(r"^@([a-zA-Z][a-zA-Z0-9_]+)$").unwrap();
23: static ref RE_IV_HASH: Regex = Regex::new(r"^[a-f0-9]{14}$").unwrap();
24: }
25:
26: /// Sends an informational message to the message's chat linking to the bot help channel.
27: pub async fn start (core: &Core, msg: &Message) -> Result<()> {
28: core.tg.send("We are open\\. Probably\\. Visit [channel](https://t.me/rsstg_bot_help/3) for details\\.",
29: Some(msg.chat.get_id()), Some(MarkdownV2)).await.stack()?;
30: Ok(())
31: }
32:
33: /// Send the sender's subscription list to the chat.
34: ///
35: /// Retrieves the message sender's user ID, obtains their subscription list from `core`,
36: /// and sends the resulting reply into the message chat using MarkdownV2.
37: pub async fn list (core: &Core, msg: &Message) -> Result<()> {
38: let sender = msg.sender.get_user_id()
39: .stack_err("Ignoring unreal users.")?;
40: let reply = core.list(sender).await.stack()?;
41: core.tg.send(reply, Some(msg.chat.get_id()), Some(MarkdownV2)).await.stack()?;
42: Ok(())
43: }
44:
45: /// Handle channel-management commands that operate on a single numeric source ID.
46: ///
47: /// This validates that exactly one numeric argument is provided, performs the requested
48: /// operation (check, clean, enable, delete, disable) against the database or core,
49: /// and sends the resulting reply to the chat.
50: ///
51: /// # Parameters
52: ///
53: /// - `core`: application core containing database and Telegram clients.
54: /// - `command`: command string (e.g. "/check", "/clean", "/enable", "/delete", "/disable").
55: /// - `msg`: incoming Telegram message that triggered the command; used to determine sender and chat.
56: /// - `words`: command arguments; expected to contain exactly one element that parses as a 32-bit integer.
57: pub async fn command (core: &Core, command: &str, msg: &Message, words: &[String]) -> Result<()> {
58: let mut conn = core.db.begin().await.stack()?;
59: let sender = msg.sender.get_user_id()
60: .stack_err("Ignoring unreal users.")?;
61: let reply = if words.len() == 1 {
62: match words[0].parse::<i32>() {
63: Err(err) => format!("I need a number.\n{}", &err).into(),
64: Ok(number) => match command {
65: "/check" => core.check(number, false, None).await
66: .context("Channel check failed.")?.into(),
67: "/clean" => conn.clean(number, sender).await.stack()?,
68: "/enable" => conn.enable(number, sender).await.stack()?.into(),
69: "/delete" => conn.delete(number, sender).await.stack()?,
70: "/disable" => conn.disable(number, sender).await.stack()?.into(),
71: _ => bail!("Command {command} {words:?} not handled."),
72: },
73: }
74: } else {
fabcca1eaf 2026-01-09 75: "This command needs exacly one number.".into()
76: };
77: core.tg.send(reply, Some(msg.chat.get_id()), None).await.stack()?;
78: Ok(())
79: }
80:
81: /// Validate command arguments, check permissions and update or add a channel feed configuration in the database.
82: ///
83: /// This function parses and validates parameters supplied by a user command (either "/update <id> ..." or "/add ..."),
84: /// verifies the channel username and feed URL, optionally validates an IV hash and a replacement regexp,
85: /// ensures both the bot and the command sender are administrators of the target channel, and performs the database update.
86: ///
87: /// # Parameters
88: ///
89: /// - `command` — the invoked command, expected to be either `"/update"` (followed by a numeric source id) or `"/add"`.
90: /// - `msg` — the incoming Telegram message; used to derive the command sender and target chat id for the reply.
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.
92: pub async fn update (core: &Core, command: &str, msg: &Message, words: &[String]) -> Result<()> {
93: let sender = msg.sender.get_user_id()
94: .stack_err("Ignoring unreal users.")?;
95: let mut source_id: Option<i32> = None;
96: let at_least = "Requires at least 3 parameters.";
97: let mut i_words = words.iter();
98: match command {
99: "/update" => {
100: let next_word = i_words.next().context(at_least)?;
101: source_id = Some(next_word.parse::<i32>()
102: .context(format!("I need a number, but got {next_word}."))?);
103: },
104: "/add" => {},
105: _ => bail!("Passing {command} is not possible here."),
106: };
107: let (channel, url, iv_hash, url_re) = (
108: i_words.next().context(at_least)?,
109: i_words.next().context(at_least)?,
110: i_words.next(),
111: i_words.next());
112: /*
113: let channel = match RE_USERNAME.captures(channel) {
114: Some(caps) => match caps.get(1) {
115: Some(data) => data.as_str(),
116: None => bail!("No string found in channel name"),
117: },
118: None => {
119: bail!("Usernames should be something like \"@\\[a\\-zA\\-Z]\\[a\\-zA\\-Z0\\-9\\_]+\", aren't they?\nNot {channel:?}");
120: },
121: };
122: */
123: if ! RE_USERNAME.is_match(channel) {
124: bail!("Usernames should be something like \"@\\[a\\-zA\\-Z]\\[a\\-zA\\-Z0\\-9\\_]+\", aren't they?\nNot {channel:?}");
125: };
126: {
127: let parsed_url = Url::parse(url)
128: .stack_err("Expecting a valid link to ATOM/RSS feed.")?;
129: match parsed_url.scheme() {
130: "http" | "https" => {},
131: scheme => {
132: bail!("Unsupported URL scheme: {scheme}");
133: },
134: };
135: }
136: let iv_hash = match iv_hash {
137: Some(hash) => {
138: match hash.as_ref() {
139: "-" => None,
140: thing => {
141: if ! RE_IV_HASH.is_match(thing) {
142: bail!("IV hash should be 14 hex digits.\nNot {thing:?}");
143: };
144: Some(thing)
145: },
146: }
147: },
148: None => None,
149: };
150: let url_re = match url_re {
151: Some(re) => {
152: match re.as_ref() {
153: "-" => None,
154: thing => {
155: let _url_rex = ReplaceCommand::new(thing).context("Regexp parsing error:")?;
156: Some(thing)
157: }
158: }
159: },
160: None => None,
161: };
162: let chat_id = ChatUsername::from(channel.as_ref());
163: let channel_id = core.tg.client.execute(GetChat::new(chat_id.clone())).await.stack_err("gettting GetChat")?.id;
164: let chan_adm = core.tg.client.execute(GetChatAdministrators::new(chat_id)).await
165: .context("Sorry, I have no access to that chat.")?;
166: let (mut me, mut user) = (false, false);
167: for admin in chan_adm {
168: let member_id = match admin {
169: ChatMember::Creator(member) => member.user.id,
170: ChatMember::Administrator(member) => member.user.id,
171: ChatMember::Left(_)
172: | ChatMember::Kicked(_)
173: | ChatMember::Member{..}
174: | ChatMember::Restricted(_) => continue,
175: };
176: if member_id == core.tg.me.id {
177: me = true;
178: }
179: if member_id == sender {
180: user = true;
181: }
182: };
183: if ! me { bail!("I need to be admin on that channel."); };
184: if ! user { bail!("You should be admin on that channel."); };
185: let mut conn = core.db.begin().await.stack()?;
186: let update = conn.update(source_id, channel, channel_id, url, iv_hash, url_re, sender).await.stack()?;
187: core.tg.send(update, Some(msg.chat.get_id()), None).await.stack()?;
188: Ok(())
189: }