Lines of
src/command.rs
from check-in be0b8602d1
that are changed by the sequence of edits moving toward
check-in d8c1d259a2:
1: use crate::{
2: core::Core,
3: tg_bot::{
4: Callback,
5: MyMessage,
6: get_kb,
7: },
8: };
9:
10: use lazy_static::lazy_static;
11: use regex::Regex;
12: use sedregex::ReplaceCommand;
13: use stacked_errors::{
14: Result,
15: StackableErr,
16: bail,
17: };
18: use tgbot::types::{
19: CallbackQuery,
20: Chat,
21: ChatMember,
22: ChatUsername,
23: GetChat,
24: GetChatAdministrators,
25: MaybeInaccessibleMessage,
26: Message,
27: };
28: use url::Url;
29:
30: lazy_static! {
31: static ref RE_USERNAME: Regex = Regex::new(r"^@([a-zA-Z][a-zA-Z0-9_]+)$").unwrap();
32: static ref RE_IV_HASH: Regex = Regex::new(r"^[a-f0-9]{14}$").unwrap();
33: }
34:
35: /// Sends an informational message to the message's chat linking to the bot help channel.
36: pub async fn start (core: &Core, msg: &Message) -> Result<()> {
37: core.tg.send(MyMessage::html_to(
38: "We are open. Probably. Visit <a href=\"https://t.me/rsstg_bot_help/3\">channel</a>) for details.",
39: msg.chat.get_id()
40: )).await.stack()?;
41: Ok(())
42: }
43:
44: /// Send the sender's subscription list to the chat.
45: ///
46: /// Retrieves the message sender's user ID, obtains their subscription list from `core`,
be0b8602d1 2026-04-18 47: /// and sends the resulting reply into the message chat using MarkdownV2.
48: pub async fn list (core: &Core, msg: &Message) -> Result<()> {
49: let sender = msg.sender.get_user_id()
50: .stack_err("Ignoring unreal users.")?;
51: let reply = core.list(sender).await.stack()?;
52: core.tg.send(MyMessage::html_to(reply, msg.chat.get_id())).await.stack()?;
53: Ok(())
54: }
55:
56: pub async fn test (core: &Core, msg: &Message) -> Result<()> {
57: let sender: i64 = msg.sender.get_user_id()
58: .stack_err("Ignoring unreal users.")?.into();
59: let feeds = core.get_feeds(sender).await.stack()?;
60: let kb = get_kb(&Callback::menu(), &feeds).await.stack()?;
61: core.tg.send(MyMessage::html_to_kb("Main menu:", msg.chat.get_id(), kb)).await.stack()?;
62: Ok(())
63: }
64:
65: /// Handle channel-management commands that operate on a single numeric source ID.
66: ///
67: /// This validates that exactly one numeric argument is provided, performs the requested
68: /// operation (check, clean, enable, delete, disable) against the database or core,
69: /// and sends the resulting reply to the chat.
70: ///
71: /// # Parameters
72: ///
73: /// - `core`: application core containing database and Telegram clients.
74: /// - `command`: command string (e.g. "/check", "/clean", "/enable", "/delete", "/disable").
75: /// - `msg`: incoming Telegram message that triggered the command; used to determine sender and chat.
76: /// - `words`: command arguments; expected to contain exactly one element that parses as a 32-bit integer.
77: pub async fn command (core: &Core, command: &str, msg: &Message, words: &[String]) -> Result<()> {
78: let mut conn = core.db.begin().await.stack()?;
79: let sender = msg.sender.get_user_id()
80: .stack_err("Ignoring unreal users.")?;
81: let reply = if words.len() == 1 {
82: match words[0].parse::<i32>() {
83: Err(err) => format!("I need a number.\n{}", &err).into(),
84: Ok(number) => match command {
85: "/check" => core.check(number, false, None).await
86: .context("Channel check failed.")?.into(),
87: "/clean" => conn.clean(number, sender).await.stack()?,
88: "/enable" => conn.enable(number, sender).await.stack()?.into(),
89: "/delete" => {
90: let res = conn.delete(number, sender).await.stack()?;
91: core.rm_feed(sender.into(), &number).await.stack()?;
92: res
93: }
94: "/disable" => conn.disable(number, sender).await.stack()?.into(),
95: _ => bail!("Command {command} {words:?} not handled."),
96: },
97: }
98: } else {
99: "This command needs exactly one number.".into()
100: };
101: core.tg.send(MyMessage::html_to(reply, msg.chat.get_id())).await.stack()?;
102: Ok(())
103: }
104:
105: /// Validate command arguments, check permissions and update or add a channel feed configuration in the database.
106: ///
107: /// This function parses and validates parameters supplied by a user command (either "/update <id> ..." or "/add ..."),
108: /// verifies the channel username and feed URL, optionally validates an IV hash and a replacement regexp,
109: /// ensures both the bot and the command sender are administrators of the target channel, and performs the database update.
110: ///
111: /// # Parameters
112: ///
113: /// - `command` — the invoked command, expected to be either `"/update"` (followed by a numeric source id) or `"/add"`.
114: /// - `msg` — the incoming Telegram message; used to derive the command sender and target chat id for the reply.
115: /// - `words` — the command arguments: for `"/add"` expected `channel url [iv_hash|'-'] [url_re|'-']`; for `"/update"`
116: /// the first element must be a numeric `source_id` followed by the same parameters.
117: pub async fn update (core: &Core, command: &str, msg: &Message, words: &[String]) -> Result<()> {
118: let sender = msg.sender.get_user_id()
119: .stack_err("Ignoring unreal users.")?;
120: let mut source_id: Option<i32> = None;
121: let at_least = "Requires at least 3 parameters.";
122: let mut i_words = words.iter();
123: match command {
124: "/update" => {
125: let next_word = i_words.next().context(at_least)?;
126: source_id = Some(next_word.parse::<i32>()
127: .context(format!("I need a number, but got {next_word}."))?);
128: },
129: "/add" => {},
130: _ => bail!("Passing {command} is not possible here."),
131: };
132: let (channel, url, iv_hash, url_re) = (
133: i_words.next().context(at_least)?,
134: i_words.next().context(at_least)?,
135: i_words.next(),
136: i_words.next());
137: if ! RE_USERNAME.is_match(channel) {
138: bail!("Usernames should be something like \"@\\[a\\-zA\\-Z]\\[a\\-zA\\-Z0\\-9\\_]+\", aren't they?\nNot {channel:?}");
139: };
140: {
141: let parsed_url = Url::parse(url)
142: .stack_err("Expecting a valid link to ATOM/RSS feed.")?;
143: match parsed_url.scheme() {
144: "http" | "https" => {},
145: scheme => {
146: bail!("Unsupported URL scheme: {scheme}");
147: },
148: };
149: }
150: let iv_hash = match iv_hash {
151: Some(hash) => {
152: match hash.as_ref() {
153: "-" => None,
154: thing => {
155: if ! RE_IV_HASH.is_match(thing) {
156: bail!("IV hash should be 14 hex digits.\nNot {thing:?}");
157: };
158: Some(thing)
159: },
160: }
161: },
162: None => None,
163: };
164: let url_re = match url_re {
165: Some(re) => {
166: match re.as_ref() {
167: "-" => None,
168: thing => {
169: let _url_rex = ReplaceCommand::new(thing).context("Regexp parsing error:")?;
170: Some(thing)
171: }
172: }
173: },
174: None => None,
175: };
176: let chat_id = ChatUsername::from(channel.as_ref());
177: let channel_id = core.tg.client.execute(GetChat::new(chat_id.clone())).await.stack_err("getting GetChat")?.id;
178: let chan_adm = core.tg.client.execute(GetChatAdministrators::new(chat_id)).await
179: .context("Sorry, I have no access to that chat.")?;
180: let (mut me, mut user) = (false, false);
181: for admin in chan_adm {
182: let member_id = match admin {
183: ChatMember::Creator(member) => member.user.id,
184: ChatMember::Administrator(member) => member.user.id,
185: ChatMember::Left(_)
186: | ChatMember::Kicked(_)
187: | ChatMember::Member{..}
188: | ChatMember::Restricted(_) => continue,
189: };
190: if member_id == core.tg.me.id {
191: me = true;
192: }
193: if member_id == sender {
194: user = true;
195: }
196: };
197: if ! me { bail!("I need to be admin on that channel."); };
198: if ! user { bail!("You should be admin on that channel."); };
199: let mut conn = core.db.begin().await.stack()?;
200: let update = conn.update(source_id, channel, channel_id, url, iv_hash, url_re, sender).await.stack()?;
201: core.tg.send(MyMessage::html_to(update, msg.chat.get_id())).await.stack()?;
202: if command == "/add" {
203: if let Some(new_record) = conn.get_one_name(sender, channel).await.stack()? {
204: core.add_feed(sender.into(), new_record.source_id, new_record.channel).await.stack()?;
205: } else {
206: bail!("Failed to read data on freshly inserted source.");
207: }
208: };
209: Ok(())
210: }
211:
212: pub async fn answer_cb (core: &Core, query: &CallbackQuery, cb: &str) -> Result<()> {
213: let cb: Callback = toml::from_str(cb).stack()?;
214: let sender = &query.from;
215: //let mut conn = core.db.begin().await.stack()?;
216: let text = "Sample".to_owned();
217: if let Some(msg) = &query.message {
218: match msg {
219: MaybeInaccessibleMessage::Message(message) => {
220: if let Some(owner) = message.sender.get_user()
221: && sender == owner
222: {
223: let feeds = core.get_feeds(owner.id.into()).await.stack()?;
224: core.tg.update_message(message.chat.get_id().into(), message.id, text, &feeds, cb).await?;
225: } else {
226: core.tg.send(MyMessage::html(format!("Can't identify request sender:<br><pre>{:?}</pre>", message))).await.stack()?;
227: }
228: },
229: MaybeInaccessibleMessage::InaccessibleMessage(message) => {
230: let sender: i64 = sender.id.into();
231: if let Chat::Private(priv_chat) = &message.chat
232: && priv_chat.id == sender
233: {
234: let feeds = core.get_feeds(priv_chat.id.into()).await.stack()?;
235: core.tg.update_message(message.chat.get_id().into(), message.message_id, text, &feeds, cb).await?;
236: } else {
237: core.tg.send(MyMessage::html(format!("Can't identify request sender:<br><pre>{:?}</pre>", message))).await.stack()?;
238: }
239: },
240: };
241: };
242: Ok(())
243: }