556 lines
21 KiB
JavaScript
556 lines
21 KiB
JavaScript
// @ts-check
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const assert = require("assert").strict
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const markdown = require("discord-markdown")
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const pb = require("prettier-bytes")
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const DiscordTypes = require("discord-api-types/v10")
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const {tag} = require("html-template-tag")
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const passthrough = require("../../passthrough")
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const {sync, db, discord, select, from} = passthrough
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/** @type {import("../../matrix/file")} */
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const file = sync.require("../../matrix/file")
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/** @type {import("./emoji-to-key")} */
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const emojiToKey = sync.require("./emoji-to-key")
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/** @type {import("./lottie")} */
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const lottie = sync.require("./lottie")
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/** @type {import("../../m2d/converters/utils")} */
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const mxUtils = sync.require("../../m2d/converters/utils")
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/** @type {import("../../discord/utils")} */
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const dUtils = sync.require("../../discord/utils")
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const reg = require("../../matrix/read-registration")
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const userRegex = reg.namespaces.users.map(u => new RegExp(u.regex))
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/**
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* @param {DiscordTypes.APIMessage} message
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* @param {DiscordTypes.APIGuild} guild
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* @param {boolean} useHTML
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*/
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function getDiscordParseCallbacks(message, guild, useHTML) {
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return {
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/** @param {{id: string, type: "discordUser"}} node */
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user: node => {
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const mxid = select("sim", "mxid", {user_id: node.id}).pluck().get()
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const username = message.mentions.find(ment => ment.id === node.id)?.username || node.id
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if (mxid && useHTML) {
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return `<a href="https://matrix.to/#/${mxid}">@${username}</a>`
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} else {
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return `@${username}:`
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}
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},
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/** @param {{id: string, type: "discordChannel"}} node */
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channel: node => {
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const row = select("channel_room", ["room_id", "name", "nick"], {channel_id: node.id}).get()
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if (!row) {
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return `<#${node.id}>` // fallback for when this channel is not bridged
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} else if (useHTML) {
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return `<a href="https://matrix.to/#/${row.room_id}">#${row.nick || row.name}</a>`
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} else {
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return `#${row.nick || row.name}`
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}
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},
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/** @param {{animated: boolean, name: string, id: string, type: "discordEmoji"}} node */
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emoji: node => {
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if (useHTML) {
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const mxc = select("emoji", "mxc_url", {emoji_id: node.id}).pluck().get()
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assert(mxc) // All emojis should have been added ahead of time in the messageToEvent function.
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return `<img data-mx-emoticon height="32" src="${mxc}" title=":${node.name}:" alt=":${node.name}:">`
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} else {
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return `:${node.name}:`
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}
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},
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role: node => {
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const role = guild.roles.find(r => r.id === node.id)
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if (!role) {
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// This fallback should only trigger if somebody manually writes a silly message, or if the cache breaks (hasn't happened yet).
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// If the cache breaks, fix discord-packets.js to store role info properly.
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return "@&" + node.id
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} else if (useHTML && role.color) {
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return `<font color="#${role.color.toString(16)}">@${role.name}</font>`
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} else if (useHTML) {
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return `<span data-mx-color="#ffffff" data-mx-bg-color="#414eef">@${role.name}</span>`
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} else {
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return `@${role.name}:`
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}
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},
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everyone: node =>
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"@room",
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here: node =>
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"@here"
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}
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}
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const embedTitleParser = markdown.markdownEngine.parserFor({
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...markdown.rules,
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autolink: undefined,
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link: undefined
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})
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/**
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* @param {{room?: boolean, user_ids?: string[]}} mentions
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* @param {DiscordTypes.APIAttachment} attachment
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*/
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async function attachmentToEvent(mentions, attachment) {
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const emoji =
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attachment.content_type?.startsWith("image/jp") ? "📸"
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: attachment.content_type?.startsWith("image/") ? "🖼️"
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: attachment.content_type?.startsWith("video/") ? "🎞️"
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: attachment.content_type?.startsWith("text/") ? "📝"
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: attachment.content_type?.startsWith("audio/") ? "🎶"
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: "📄"
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// no native media spoilers in Element, so we'll post a link instead, forcing it to not preview using a blockquote
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if (attachment.filename.startsWith("SPOILER_")) {
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return {
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$type: "m.room.message",
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"m.mentions": mentions,
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msgtype: "m.text",
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body: `${emoji} Uploaded SPOILER file: ${attachment.url} (${pb(attachment.size)})`,
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format: "org.matrix.custom.html",
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formatted_body: `<blockquote>${emoji} Uploaded SPOILER file: <a href="${attachment.url}">${attachment.url}</a> (${pb(attachment.size)})</blockquote>`
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}
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}
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// for large files, always link them instead of uploading so I don't use up all the space in the content repo
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else if (attachment.size > reg.ooye.max_file_size) {
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return {
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$type: "m.room.message",
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"m.mentions": mentions,
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msgtype: "m.text",
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body: `${emoji} Uploaded file: ${attachment.url} (${pb(attachment.size)})`,
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format: "org.matrix.custom.html",
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formatted_body: `${emoji} Uploaded file: <a href="${attachment.url}">${attachment.filename}</a> (${pb(attachment.size)})`
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}
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} else if (attachment.content_type?.startsWith("image/") && attachment.width && attachment.height) {
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return {
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$type: "m.room.message",
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"m.mentions": mentions,
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msgtype: "m.image",
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url: await file.uploadDiscordFileToMxc(attachment.url),
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external_url: attachment.url,
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body: attachment.description || attachment.filename,
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filename: attachment.filename,
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info: {
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mimetype: attachment.content_type,
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w: attachment.width,
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h: attachment.height,
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size: attachment.size
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}
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}
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} else if (attachment.content_type?.startsWith("video/") && attachment.width && attachment.height) {
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return {
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$type: "m.room.message",
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"m.mentions": mentions,
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msgtype: "m.video",
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url: await file.uploadDiscordFileToMxc(attachment.url),
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external_url: attachment.url,
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body: attachment.description || attachment.filename,
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filename: attachment.filename,
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info: {
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mimetype: attachment.content_type,
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w: attachment.width,
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h: attachment.height,
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size: attachment.size
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}
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}
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} else if (attachment.content_type?.startsWith("audio/")) {
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return {
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$type: "m.room.message",
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"m.mentions": mentions,
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msgtype: "m.audio",
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url: await file.uploadDiscordFileToMxc(attachment.url),
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external_url: attachment.url,
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body: attachment.description || attachment.filename,
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filename: attachment.filename,
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info: {
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mimetype: attachment.content_type,
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size: attachment.size,
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duration: attachment.duration_secs ? attachment.duration_secs * 1000 : undefined
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}
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}
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} else {
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return {
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$type: "m.room.message",
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"m.mentions": mentions,
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msgtype: "m.file",
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url: await file.uploadDiscordFileToMxc(attachment.url),
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external_url: attachment.url,
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body: attachment.description || attachment.filename,
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filename: attachment.filename,
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info: {
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mimetype: attachment.content_type,
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size: attachment.size
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}
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}
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}
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}
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/**
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* @param {import("discord-api-types/v10").APIMessage} message
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* @param {import("discord-api-types/v10").APIGuild} guild
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* @param {{includeReplyFallback?: boolean, includeEditFallbackStar?: boolean}} options default values:
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* - includeReplyFallback: true
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* - includeEditFallbackStar: false
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* @param {{api: import("../../matrix/api")}} di simple-as-nails dependency injection for the matrix API
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*/
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async function messageToEvent(message, guild, options = {}, di) {
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const events = []
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if (message.type === DiscordTypes.MessageType.ThreadCreated) {
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// This is the kind of message that appears when somebody makes a thread which isn't close enough to the message it's based off.
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// It lacks the lines and the pill, so it looks kind of like a member join message, and it says:
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// [#] NICKNAME started a thread: __THREAD NAME__. __See all threads__
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// We're already bridging the THREAD_CREATED gateway event to make a comparable message, so drop this one.
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return []
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}
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if (message.type === DiscordTypes.MessageType.ThreadStarterMessage) {
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// This is the message that appears at the top of a thread when the thread was based off an existing message.
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// It's just a message reference, no content.
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const ref = message.message_reference
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assert(ref)
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assert(ref.message_id)
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const eventID = select("event_message", "event_id", {message_id: ref.message_id}).pluck().get()
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const roomID = select("channel_room", "room_id", {channel_id: ref.channel_id}).pluck().get()
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if (!eventID || !roomID) return []
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const event = await di.api.getEvent(roomID, eventID)
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return [{
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...event.content,
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$type: event.type,
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$sender: null
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}]
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}
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/**
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@type {{room?: boolean, user_ids?: string[]}}
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We should consider the following scenarios for mentions:
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1. A discord user rich-replies to a matrix user with a text post
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+ The matrix user needs to be m.mentioned in the text event
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+ The matrix user needs to have their name/mxid/link in the text event (notification fallback)
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- So prepend their `@name:` to the start of the plaintext body
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2. A discord user rich-replies to a matrix user with an image event only
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+ The matrix user needs to be m.mentioned in the image event
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+ TODO The matrix user needs to have their name/mxid in the image event's body field, alongside the filename (notification fallback)
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- So append their name to the filename body, I guess!!!
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3. A discord user `@`s a matrix user in the text body of their text box
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+ The matrix user needs to be m.mentioned in the text event
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+ No change needed to the text event content: it already has their name
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- So make sure we don't do anything in this case.
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*/
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const mentions = {}
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let repliedToEventRow = null
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let repliedToEventSenderMxid = null
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function addMention(mxid) {
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if (!mentions.user_ids) mentions.user_ids = []
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if (!mentions.user_ids.includes(mxid)) mentions.user_ids.push(mxid)
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}
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// Mentions scenarios 1 and 2, part A. i.e. translate relevant message.mentions to m.mentions
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// (Still need to do scenarios 1 and 2 part B, and scenario 3.)
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if (message.type === DiscordTypes.MessageType.Reply && message.message_reference?.message_id) {
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const row = from("event_message").join("message_channel", "message_id").join("channel_room", "channel_id").select("event_id", "room_id", "source").and("WHERE message_id = ? AND part = 0").get(message.message_reference.message_id)
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if (row) {
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repliedToEventRow = row
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}
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}
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if (repliedToEventRow && repliedToEventRow.source === 0) { // reply was originally from Matrix
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// Need to figure out who sent that event...
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const event = await di.api.getEvent(repliedToEventRow.room_id, repliedToEventRow.event_id)
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repliedToEventSenderMxid = event.sender
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// Need to add the sender to m.mentions
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addMention(repliedToEventSenderMxid)
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}
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/**
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* Translate Discord message links to Matrix event links.
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* If OOYE has handled this message in the past, this is an instant database lookup.
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* Otherwise, if OOYE knows the channel, this is a multi-second request to /timestamp_to_event to approximate.
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* @param {string} content Partial or complete Discord message content
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*/
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async function transformContentMessageLinks(content) {
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let offset = 0
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for (const match of [...content.matchAll(/https:\/\/(?:ptb\.|canary\.|www\.)?discord(?:app)?\.com\/channels\/[0-9]+\/([0-9]+)\/([0-9]+)/g)]) {
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assert(typeof match.index === "number")
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const [_, channelID, messageID] = match
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let result
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const roomID = select("channel_room", "room_id", {channel_id: channelID}).pluck().get()
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if (roomID) {
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const eventID = select("event_message", "event_id", {message_id: messageID}).pluck().get()
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if (eventID && roomID) {
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result = `https://matrix.to/#/${roomID}/${eventID}`
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} else {
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const ts = dUtils.snowflakeToTimestampExact(messageID)
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const {event_id} = await di.api.getEventForTimestamp(roomID, ts)
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result = `https://matrix.to/#/${roomID}/${event_id}`
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}
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} else {
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result = `${match[0]} [event is from another server]`
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}
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content = content.slice(0, match.index + offset) + result + content.slice(match.index + match[0].length + offset)
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offset += result.length - match[0].length
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}
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return content
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}
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/**
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* Translate links and emojis and mentions and stuff. Give back the text and HTML so they can be combined into bigger events.
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* @param {string} content Partial or complete Discord message content
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* @param {any} customOptions
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* @param {any} customParser
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* @param {any} customHtmlOutput
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*/
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async function transformContent(content, customOptions = {}, customParser = null, customHtmlOutput = null) {
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content = await transformContentMessageLinks(content)
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// Handling emojis that we don't know about. The emoji has to be present in the DB for it to be picked up in the emoji markdown converter.
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// So we scan the message ahead of time for all its emojis and ensure they are in the DB.
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const emojiMatches = [...content.matchAll(/<(a?):([^:>]{2,64}):([0-9]+)>/g)]
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await Promise.all(emojiMatches.map(match => {
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const id = match[3]
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const name = match[2]
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const animated = !!match[1]
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return emojiToKey.emojiToKey({id, name, animated}) // Register the custom emoji if needed
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}))
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let html = markdown.toHTML(content, {
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discordCallback: getDiscordParseCallbacks(message, guild, true),
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...customOptions
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}, customParser, customHtmlOutput)
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let body = markdown.toHTML(content, {
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discordCallback: getDiscordParseCallbacks(message, guild, false),
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discordOnly: true,
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escapeHTML: false,
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...customOptions
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}, null, null)
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return {body, html}
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}
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async function addTextEvent(body, html, msgtype, {scanMentions}) {
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// Star * prefix for fallback edits
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if (options.includeEditFallbackStar) {
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body = "* " + body
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html = "* " + html
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}
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const flags = message.flags || 0
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if (flags & 2) {
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body = `[🔀 ${message.author.username}]\n` + body
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html = `🔀 <strong>${message.author.username}</strong><br>` + html
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}
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// Fallback body/formatted_body for replies
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// This branch is optional - do NOT change anything apart from the reply fallback, since it may not be run
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if (repliedToEventRow && options.includeReplyFallback !== false) {
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let repliedToDisplayName
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let repliedToUserHtml
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if (repliedToEventRow?.source === 0 && repliedToEventSenderMxid) {
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const match = repliedToEventSenderMxid.match(/^@([^:]*)/)
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assert(match)
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repliedToDisplayName = match[1] || "a Matrix user" // grab the localpart as the display name, whatever
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repliedToUserHtml = `<a href="https://matrix.to/#/${repliedToEventSenderMxid}">${repliedToDisplayName}</a>`
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} else {
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repliedToDisplayName = message.referenced_message?.author.global_name || message.referenced_message?.author.username || "a Discord user"
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repliedToUserHtml = repliedToDisplayName
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}
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let repliedToContent = message.referenced_message?.content
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if (repliedToContent?.startsWith("> <:L1:")) {
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// If the Discord user is replying to a Matrix user's reply, the fallback is going to contain the emojis and stuff from the bridged rep of the Matrix user's reply quote.
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// Need to remove that previous reply rep from this fallback body. The fallbody body should only contain the Matrix user's actual message.
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repliedToContent = repliedToContent.split("\n").slice(2).join("\n")
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}
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if (repliedToContent == "") repliedToContent = "[Media]"
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else if (!repliedToContent) repliedToContent = "[Replied-to message content wasn't provided by Discord]"
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const repliedToHtml = markdown.toHTML(repliedToContent, {
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discordCallback: getDiscordParseCallbacks(message, guild, true)
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}, null, null)
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const repliedToBody = markdown.toHTML(repliedToContent, {
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discordCallback: getDiscordParseCallbacks(message, guild, false),
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discordOnly: true,
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escapeHTML: false,
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}, null, null)
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html = `<mx-reply><blockquote><a href="https://matrix.to/#/${repliedToEventRow.room_id}/${repliedToEventRow.event_id}">In reply to</a> ${repliedToUserHtml}`
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+ `<br>${repliedToHtml}</blockquote></mx-reply>`
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+ html
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body = (`${repliedToDisplayName}: ` // scenario 1 part B for mentions
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+ repliedToBody).split("\n").map(line => "> " + line).join("\n")
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+ "\n\n" + body
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}
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const newTextMessageEvent = {
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$type: "m.room.message",
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"m.mentions": mentions,
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msgtype,
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body: body
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}
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const isPlaintext = body === html
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if (!isPlaintext) {
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Object.assign(newTextMessageEvent, {
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format: "org.matrix.custom.html",
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formatted_body: html
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})
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}
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events.push(newTextMessageEvent)
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}
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let msgtype = "m.text"
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// Handle message type 4, channel name changed
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if (message.type === DiscordTypes.MessageType.ChannelNameChange) {
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msgtype = "m.emote"
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message.content = "changed the channel name to **" + message.content + "**"
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}
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// Mentions scenario 3: scan the message content for written @mentions of matrix users. Allows for up to one space between @ and mention.
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const matches = [...message.content.matchAll(/@ ?([a-z0-9._]+)\b/gi)]
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if (matches.length && matches.some(m => m[1].match(/[a-z]/i))) {
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const writtenMentionsText = matches.map(m => m[1].toLowerCase())
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const roomID = select("channel_room", "room_id", {channel_id: message.channel_id}).pluck().get()
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assert(roomID)
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const {joined} = await di.api.getJoinedMembers(roomID)
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for (const [mxid, member] of Object.entries(joined)) {
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if (!userRegex.some(rx => mxid.match(rx))) {
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const localpart = mxid.match(/@([^:]*)/)
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assert(localpart)
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const displayName = member.display_name || localpart[1]
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if (writtenMentionsText.includes(localpart[1].toLowerCase()) || writtenMentionsText.includes(displayName.toLowerCase())) addMention(mxid)
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}
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}
|
||
}
|
||
|
||
// Text content appears first
|
||
if (message.content) {
|
||
const {body, html} = await transformContent(message.content)
|
||
await addTextEvent(body, html, msgtype, {scanMentions: true})
|
||
}
|
||
|
||
// Then attachments
|
||
const attachmentEvents = await Promise.all(message.attachments.map(attachmentToEvent.bind(null, mentions)))
|
||
events.push(...attachmentEvents)
|
||
|
||
// Then embeds
|
||
for (const embed of message.embeds || []) {
|
||
if (embed.type === "image") {
|
||
continue // Matrix's own URL previews are fine for images.
|
||
}
|
||
|
||
// Start building up a replica ("rep") of the embed in Discord-markdown format, which we will convert into both plaintext and formatted body at once
|
||
const rep = new mxUtils.MatrixStringBuilder()
|
||
|
||
// Author and URL into a paragraph
|
||
let authorNameText = embed.author?.name || ""
|
||
if (authorNameText && embed.author?.icon_url) authorNameText = `⏺️ ${authorNameText}` // using the emoji instead of an image
|
||
if (authorNameText || embed.author?.url) {
|
||
if (embed.author?.url) {
|
||
const authorURL = await transformContentMessageLinks(embed.author.url)
|
||
rep.addParagraph(`## ${authorNameText} ${authorURL}`, tag`<strong><a href="${authorURL}">${authorNameText}</a></strong>`)
|
||
} else {
|
||
rep.addParagraph(`## ${authorNameText}`, tag`<strong>${authorNameText}</strong>`)
|
||
}
|
||
}
|
||
|
||
// Title and URL into a paragraph
|
||
if (embed.title) {
|
||
const {body, html} = await transformContent(embed.title, {}, embedTitleParser, markdown.htmlOutput)
|
||
if (embed.url) {
|
||
rep.addParagraph(`## ${body} ${embed.url}`, tag`<strong><a href="${embed.url}">$${html}</a></strong>`)
|
||
} else {
|
||
rep.addParagraph(`## ${body}`, `<strong>${html}</strong>`)
|
||
}
|
||
} else if (embed.url) {
|
||
rep.addParagraph(`## ${embed.url}`, tag`<strong><a href="${embed.url}">${embed.url}</a></strong>`)
|
||
}
|
||
|
||
if (embed.description) {
|
||
const {body, html} = await transformContent(embed.description)
|
||
rep.addParagraph(body, html)
|
||
}
|
||
|
||
for (const field of embed.fields || []) {
|
||
const name = field.name.match(/^[\s]*$/) ? {body: "", html: ""} : await transformContent(field.name, {}, embedTitleParser, markdown.htmlOutput)
|
||
const value = await transformContent(field.value)
|
||
const fieldRep = new mxUtils.MatrixStringBuilder()
|
||
.addLine(`### ${name.body}`, `<strong>${name.html}</strong>`, name.body)
|
||
.addLine(value.body, value.html, !!value.body)
|
||
rep.addParagraph(fieldRep.get().body, fieldRep.get().formatted_body)
|
||
}
|
||
|
||
if (embed.image?.url) rep.addParagraph(`📸 ${embed.image.url}`)
|
||
if (embed.video?.url) rep.addParagraph(`🎞️ ${embed.video.url}`)
|
||
|
||
if (embed.footer?.text) rep.addLine(`— ${embed.footer.text}`, tag`— ${embed.footer.text}`)
|
||
let {body, formatted_body: html} = rep.get()
|
||
body = body.split("\n").map(l => "> " + l).join("\n")
|
||
html = `<blockquote>${html}</blockquote>`
|
||
|
||
// Send as m.notice to apply the usual automated/subtle appearance, showing this wasn't actually typed by the person
|
||
await addTextEvent(body, html, "m.notice", {scanMentions: false})
|
||
}
|
||
|
||
// Then stickers
|
||
if (message.sticker_items) {
|
||
const stickerEvents = await Promise.all(message.sticker_items.map(async stickerItem => {
|
||
const format = file.stickerFormat.get(stickerItem.format_type)
|
||
if (format?.mime === "lottie") {
|
||
try {
|
||
const {mxc_url, info} = await lottie.convert(stickerItem)
|
||
return {
|
||
$type: "m.sticker",
|
||
"m.mentions": mentions,
|
||
body: stickerItem.name,
|
||
info,
|
||
url: mxc_url
|
||
}
|
||
} catch (e) {
|
||
return {
|
||
$type: "m.room.message",
|
||
"m.mentions": mentions,
|
||
msgtype: "m.notice",
|
||
body: `Failed to convert Lottie sticker:\n${e.toString()}\n${e.stack}`
|
||
}
|
||
}
|
||
} else if (format?.mime) {
|
||
let body = stickerItem.name
|
||
const sticker = guild.stickers.find(sticker => sticker.id === stickerItem.id)
|
||
if (sticker && sticker.description) body += ` - ${sticker.description}`
|
||
return {
|
||
$type: "m.sticker",
|
||
"m.mentions": mentions,
|
||
body,
|
||
info: {
|
||
mimetype: format.mime
|
||
},
|
||
url: await file.uploadDiscordFileToMxc(file.sticker(stickerItem))
|
||
}
|
||
}
|
||
return {
|
||
$type: "m.room.message",
|
||
"m.mentions": mentions,
|
||
msgtype: "m.notice",
|
||
body: `Unsupported sticker format ${format?.mime}. Name: ${stickerItem.name}`
|
||
}
|
||
}))
|
||
events.push(...stickerEvents)
|
||
}
|
||
|
||
// Rich replies
|
||
if (repliedToEventRow) {
|
||
Object.assign(events[0], {
|
||
"m.relates_to": {
|
||
"m.in_reply_to": {
|
||
event_id: repliedToEventRow.event_id
|
||
}
|
||
}
|
||
})
|
||
}
|
||
|
||
return events
|
||
}
|
||
|
||
module.exports.messageToEvent = messageToEvent
|