feat: Implement group chart support

locales/en.ftl

@@ -1,18 +1,23 @@
 start = hii! just send me a link and i'll download it. (ᵔᵕᵔ)◜
+join =
+    hii! (ᵔᵕᵔ)◜
+    i will download all links i'll find in this chat.
+    all error messages will be deleted within 30 seconds to not annoy you.
 
 error-title = error
 error = { error-title }: { $message } { $error-emoticon }
 error-not-url = i couldn't find url in your message
 error-request-not-found = looks like i forgot your link, try sending it again
 error-not-button-owner = looks like this button is not yours (¬_¬")
+error-admin-button = only admins can touch this button!!
 error-too-large = sorry, but this file is too big - telegram doesn't allow me to upload it
 error-invalid-response = server response is invalid, maybe it's down or encountered an internal error
 error-unresponsive = couldn't connect to this server, maybe it's down...
 error-invalid-url = looks like i dont recognise the link you sent... maybe the service isn't supported or you pasted it wrong
 error-media-unavailable = i found your media, but couldn't download it. maybe its private, age restricted or region locked.
 error-unknown = oops, an internal error happened. i reported it to my developer, so they'll fix it!
 
-note-picker = your link contained multiple media files, so i sent them to you via pms
+note-picker = your link contained multiple media files, so i sent them to you seperately or via pms
 
 download-title = download from provided url
 type-select-title = select download type (｡ · ᎑ ·｡)
@@ -71,4 +76,4 @@ stats-global = i helped with downloading { $count } times! (˶ᵔ ᵕ ᵔ˶)
 info =
     running { $name }@{ $version }
     sources: { $repository }
-    report bugs: { $bugs }
+    report bugs: { $bugs }

locales/ru.ftl

@@ -1,18 +1,23 @@
 start = привет! просто отправь мне ссылку и я её скачаю. (ᵔᵕᵔ)◜
+join =
+    привет! (ᵔᵕᵔ)◜
+    я буду скачивать все ссылки, которые я найду в этом чате.
+    все сообщения об ошибках будут удаляться в течении 30 секунд, чтобы не мешать вам.
 
 error-title = ошибка
 error = { error-title }: { $message } { $error-emoticon }
 error-not-url = я не нашёл ссылки в твоём сообщении
 error-request-not-found = похоже я потерял твою ссылку, можешь отправить её снова?
 error-not-button-owner = похоже что эта кнопка не твоя (¬_¬")
+error-admin-button = только админам можно тыкать эту кнопку!!
 error-too-large = этот файл слишком большой, к сожалению тг не даёт его загрузить
 error-invalid-response = сервер некорректно ответил, возможно он столкнулся с внутренней ошибкой или лежит
 error-unresponsive = не удалось подключиться к серверу, наверное он лежит...
 error-invalid-url = кажется у меня не получается распознать отправленную сылку... возможно она неправильно вставлена или этот сервис не поддерживается
 error-media-unavailable = я нашёл нужный файл, но не смог его скачать. возможно на нём ограничения по региону, возрасту или приватности.
 error-unknown = ой, произошла внутреняя ошибка. я сообщил об этом моим разработчикам, чтобы они исправили!
 
-note-picker = по твоей ссылке я нашёл несколько медиа файлов, поэтому я отправил тебе их в лс
+note-picker = по твоей ссылке я нашёл несколько медиа файлов, поэтому я отправил тебе отдельно или их в лс
 
 download-title = скачать по ссылке
 type-select-title = выбери тип загрузки (｡ · ᎑ ·｡)
@@ -57,4 +62,4 @@ stats-global = я помог с загрузкой { $count } раз! (˶ᵔ ᵕ
 info =
     выполняется { $name }@{ $version }
     сурсы: { $repository }
-    репорт багов: { $bugs }
+    репорт багов: { $bugs }

src/telegram/bot/download.ts

@@ -1,11 +1,13 @@
+import type { BusinessCallbackQueryContext, CallbackQueryContext, InlineCallbackQueryContext } from "@mtcute/dispatcher"
 import type { InputMediaLike, Peer } from "@mtcute/node"
 
 import { randomUUID } from "node:crypto"
-import { Dispatcher, filters } from "@mtcute/dispatcher"
+import { Dispatcher } from "@mtcute/dispatcher"
 import { BotInline, BotKeyboard } from "@mtcute/node"
 
 import type { MediaRequest } from "@/core/data/request"
 import { createRequest, getRequest } from "@/core/data/request"
+import type { Settings } from "@/core/data/settings"
 import { incrementDownloadCount } from "@/core/data/stats"
 import {
     getOutputSelectionMessage,
@@ -18,44 +20,52 @@ import { evaluatorsFor } from "@/telegram/helpers/text"
 
 export const downloadDp = Dispatcher.child()
 
-downloadDp.onNewMessage(filters.chat("user"), async (msg) => {
-    const { e, t } = await evaluatorsFor(msg.sender)
+const errorDeleteDelay = 30 * 1000
+
+downloadDp.onNewMessage(async (msg) => {
+    const { e, t } = await evaluatorsFor(msg.chat)
 
     if (msg.text === "meow") {
         await msg.replyText("meow :з")
         return
     }
 
-    const urlEntity = msg.entities.find(e => e.is("text_link") || e.is("url"))
-    const extractedUrl = urlEntity && (urlEntity.is("text_link") ? urlEntity.params.url : urlEntity.text)
-    const req = await createRequest(extractedUrl || msg.text, msg.sender.id)
+    const urlEntities = msg.entities.filter(e => e.is("text_link") || e.is("url"))
+    const extractedUrls = urlEntities.map(e => (e.is("text_link") ? e.params.url : e.text))
+    const urls = extractedUrls.length ? extractedUrls : [msg.text]
+    for (const url of urls) {
+        const req = await createRequest(url, msg.sender.id)
 
-    if (!req.success) {
-        await msg.replyText(t("error", { message: e(req.error) }))
-        return
-    }
+        if (!req.success) {
+            if (msg.chat.type === "user")
+                await msg.replyText(t("error", { message: e(req.error) }))
+            return
+        }
 
-    const selectMsg = getOutputSelectionMessage(req.result.id)
-    const reply = await msg.replyText(e(selectMsg.caption), {
-        replyMarkup: BotKeyboard.inline([
-            selectMsg.options.map(o => BotKeyboard.callback(
-                e(o.name),
-                o.key,
-            )),
-        ]),
-    })
-
-    const settings = await getPeerSettings(msg.sender)
-    if (settings.preferredOutput) {
-        await onOutputSelected(
-            settings.preferredOutput,
-            req.result,
-            args => msg.client.editMessage({ ...args, message: reply }),
-            { e, t },
-            msg.sender,
-            !!settings.preferredAttribution,
-            ({ medias }) => msg.replyMediaGroup(medias),
-        )
+        const selectMsg = getOutputSelectionMessage(req.result.id)
+        const reply = await msg.replyText(e(selectMsg.caption), {
+            replyMarkup: BotKeyboard.inline([
+                selectMsg.options.map(o => BotKeyboard.callback(
+                    e(o.name),
+                    o.key,
+                )),
+            ]),
+        })
+
+        const settings = await getPeerSettings(msg.chat)
+        if (settings.preferredOutput || msg.chat.type !== "user") {
+            const res = await onOutputSelected(
+                settings.preferredOutput || "auto",
+                req.result,
+                args => msg.client.editMessage({ ...args, message: reply }),
+                { e, t },
+                settings,
+                ({ medias }) => msg.replyMediaGroup(medias),
+                msg.sender,
+            )
+            if (!res && msg.chat.type !== "user")
+                setTimeout(() => msg.client.deleteMessages([reply]), errorDeleteDelay)
+        }
     }
 })
 
@@ -102,8 +112,13 @@ downloadDp.onInlineQuery(async (ctx) => {
 })
 
 downloadDp.onAnyCallbackQuery(OutputButton.filter(), async (upd) => {
-    const settings = await getPeerSettings(upd.user)
-    const { t, e } = await evaluatorsFor(upd.user)
+    // When passing a filter to onAnyCallbackQuery it applies a modification to the update object, which makes it lose its enum-like properties.
+    // To access the original update object, we need to cast it to the original type.
+    const rawUpd = upd as unknown as (CallbackQueryContext | InlineCallbackQueryContext | BusinessCallbackQueryContext)
+
+    const peer = rawUpd._name === "callback_query" ? rawUpd.chat : upd.user
+    const settings = await getPeerSettings(peer)
+    const { t, e } = await evaluatorsFor(peer)
     const { output: outputType, request: requestId } = upd.match
 
     const request = await getRequest(requestId)
@@ -113,15 +128,17 @@ downloadDp.onAnyCallbackQuery(OutputButton.filter(), async (upd) => {
         })
     }
 
-    await onOutputSelected(
+    const res = await onOutputSelected(
         outputType,
         request,
         args => upd.editMessage(args),
         { t, e },
+        settings,
+        ({ medias }) => upd.client.sendMediaGroup(peer.id, medias),
         upd.user,
-        !!settings.preferredAttribution,
-        ({ medias }) => upd.client.sendMediaGroup(upd.user.id, medias),
     )
+    if (!res && rawUpd._name === "callback_query" && rawUpd.chat.type !== "user")
+        setTimeout(() => upd.client.deleteMessagesById(rawUpd.chat.id, [rawUpd.messageId]), errorDeleteDelay)
 })
 
 downloadDp.onChosenInlineResult(async (upd) => {
@@ -136,9 +153,9 @@ downloadDp.onChosenInlineResult(async (upd) => {
             request,
             args => upd.editMessage({ ...args, messageId }),
             await evaluatorsFor(upd.user),
-            upd.user,
-            !!settings.preferredAttribution,
+            settings,
             ({ medias }) => upd.client.sendMediaGroup(upd.user.id, medias),
+            upd.user,
         )
     }
 })
@@ -148,15 +165,15 @@ async function onOutputSelected(
     request: MediaRequest | undefined,
     editMessage: (edit: { text?: string, media?: InputMediaLike }) => Promise<unknown>,
     { t, e }: Evaluators,
-    peer: Peer,
-    leaveSourceLink: boolean,
+    settings: Settings,
     sendGroup: (send: { medias: InputMediaLike[] }) => Promise<unknown>,
+    sender: Peer,
 ) {
     await editMessage({ text: t("downloading-title") })
-    const res = await handleMediaDownload(outputType, request, peer)
+    const res = await handleMediaDownload(outputType, request, settings)
     if (!res.success) {
         await editMessage({ text: t("error", { message: e(res.error) }) })
-        return
+        return false
     }
 
     await editMessage({ text: t("uploading-title") })
@@ -168,10 +185,11 @@ async function onOutputSelected(
             await sendGroup({ medias: chunk })
         }
     } else {
-        await editMessage({ media: res.result[0] })
-        await editMessage({ text: (leaveSourceLink && request?.url) || "" })
+        await editMessage({ media: res.result[0], text: (!!settings.preferredAttribution && request?.url) || "" })
     }
 
-    incrementDownloadCount(peer.id)
+    incrementDownloadCount(sender.id)
         .catch(() => { /* noop */ })
+
+    return true
 }

src/telegram/bot/info.ts

@@ -6,6 +6,6 @@ import { evaluatorsFor } from "@/telegram/helpers/text"
 export const infoDp = Dispatcher.child()
 
 settingsDp.onNewMessage(filters.command("info"), async (msg) => {
-    const { t } = await evaluatorsFor(msg.sender)
+    const { t } = await evaluatorsFor(msg.chat)
     await msg.replyText(t("info", { bugs, name, repository, version }))
 })

src/telegram/bot/settings.ts

@@ -1,3 +1,4 @@
+import type { Peer, TelegramClient, User } from "@mtcute/node"
 import { Dispatcher, filters, PropagationAction } from "@mtcute/dispatcher"
 import { BotKeyboard } from "@mtcute/node"
 
@@ -34,6 +35,13 @@ function settingsMessage(e: TextEvaluator, settings: Settings) {
     }
 }
 
+async function isAdmin(client: Pick<TelegramClient, "getChatMember">, chat: Peer, user: User) {
+    if (chat.type !== "chat")
+        return true
+    const member = await client.getChatMember({ chatId: chat, userId: user })
+    return member?.status === "admin" || member?.status === "creator"
+}
+
 function settingEditMessage(e: TextEvaluator, settings: Settings, setting: keyof Settings) {
     const menu = getSettingMenu(settings, setting)
     return {
@@ -49,16 +57,21 @@ function settingEditMessage(e: TextEvaluator, settings: Settings, setting: keyof
 settingsDp.onNewMessage(
     filters.or(filters.command("settings"), filters.deeplink(["settings"])),
     async (msg) => {
-        const { e } = await evaluatorsFor(msg.sender)
-        const settings = await getPeerSettings(msg.sender)
+        const { e } = await evaluatorsFor(msg.chat)
+        const settings = await getPeerSettings(msg.chat)
         const { text, ...props } = settingsMessage(e, settings)
         await msg.replyText(text, props)
     },
 )
 
-settingsDp.onAnyCallbackQuery(SettingButton.filter(), async (upd) => {
-    const { e } = await evaluatorsFor(upd.user)
-    const settings = await getPeerSettings(upd.user)
+settingsDp.onCallbackQuery(SettingButton.filter(), async (upd) => {
+    const { e, t } = await evaluatorsFor(upd.chat)
+    if (!await isAdmin(upd.client, upd.chat, upd.user)) {
+        return await upd.answer({
+            text: t("error-admin-button"),
+        })
+    }
+    const settings = await getPeerSettings(upd.chat)
     if (upd.match.setting === "back") {
         await upd.editMessage(settingsMessage(e, settings))
         return
@@ -69,36 +82,46 @@ settingsDp.onAnyCallbackQuery(SettingButton.filter(), async (upd) => {
     await upd.editMessage(settingEditMessage(e, settings, upd.match.setting))
 })
 
-settingsDp.onAnyCallbackQuery(SettingUpdateButton.filter(), async (upd, state) => {
+settingsDp.onCallbackQuery(SettingUpdateButton.filter(), async (upd, state) => {
     if (!isValidSettingKey(upd.match.setting))
         return // Invalid key
+    if (!await isAdmin(upd.client, upd.chat, upd.user)) {
+        const { t } = await evaluatorsFor(upd.chat)
+        return await upd.answer({
+            text: t("error-admin-button"),
+        })
+    }
 
-    const settings = await getPeerSettings(upd.user)
+    const settings = await getPeerSettings(upd.chat)
     const valueIndex = +upd.match.value
     const value = getSettingValues(upd.match.setting)[valueIndex]
     if (value === customValue) {
-        const { e, t } = await evaluatorsFor(upd.user)
+        const { e, t } = await evaluatorsFor(upd.chat)
         const { text: _, ...props } = settingEditMessage(e, settings, upd.match.setting)
         await upd.editMessage({ text: t("setting-custom"), ...props })
         await state.enter(settingInputScene, { with: { setting: upd.match.setting } })
         return
     }
-    const newSettings = await updateSetting(upd.match.setting, value, upd.user.id)
+    const newSettings = await updateSetting(upd.match.setting, value, upd.chat.id)
 
     // We're getting evaluator AFTER the possible locale update
-    const { e } = await evaluatorsFor(upd.user)
+    const { e } = await evaluatorsFor(upd.chat)
     await upd.editMessage(settingEditMessage(e, newSettings ?? settings, upd.match.setting))
 })
 
 settingInputScene.onNewMessage(async (upd, state) => {
+    if (upd.sender.type !== "user" || !await isAdmin(upd.client, upd.chat, upd.sender)) {
+        return
+    }
+
     const stateData = await state.get()
     if (!stateData) {
         await state.exit()
         return
     }
 
-    const { t } = await evaluatorsFor(upd.sender)
-    await updateSetting(stateData.setting, upd.text, upd.sender.id)
+    const { t } = await evaluatorsFor(upd.chat)
+    await updateSetting(stateData.setting, upd.text, upd.chat.id)
     await upd.replyText(t("setting-saved"))
 
     await state.exit()

src/telegram/bot/start.ts

@@ -3,6 +3,11 @@ import { translatorFor } from "@/telegram/helpers/i18n"
 
 export const startDp = Dispatcher.child()
 startDp.onNewMessage(filters.start, async (msg) => {
-    const t = await translatorFor(msg.sender)
+    const t = await translatorFor(msg.chat)
     await msg.replyText(t("start"))
 })
+
+startDp.onChatMemberUpdate(filters.and(filters.chatMemberSelf, filters.chatMember("added")), async (upd) => {
+    const t = await translatorFor(upd.chat)
+    await upd.client.sendText(upd.chat, t("join"))
+})

src/telegram/bot/stats.ts

@@ -6,13 +6,13 @@ import { evaluatorsFor } from "@/telegram/helpers/text"
 export const statsDp = Dispatcher.child()
 
 statsDp.onNewMessage(filters.command("stats"), async (msg) => {
-    const { t } = await evaluatorsFor(msg.sender)
+    const { t } = await evaluatorsFor(msg.chat)
     const count = await getDownloadStats()
     await msg.replyText(t("stats-global", { count }))
 })
 
 statsDp.onNewMessage(filters.command("mystats"), async (msg) => {
-    const { t } = await evaluatorsFor(msg.sender)
+    const { t } = await evaluatorsFor(msg.chat)
     const id = msg.sender.id
     const count = await getDownloadStats(id)
     await msg.replyText(t("stats-personal", { count }))