146 lines
4.1 KiB
JavaScript
146 lines
4.1 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 passthrough = require("../../passthrough")
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const { sync, db, discord } = passthrough
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/** @type {import("../../matrix/file")} */
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const file = sync.require("../../matrix/file")
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function getDiscordParseCallbacks(message, useHTML) {
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return {
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user: node => {
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const mxid = db.prepare("SELECT mxid FROM sim WHERE discord_id = ?").pluck().get(node.id)
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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 `@${username}:`
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}
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},
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channel: node => {
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const {room_id, name, nick} = db.prepare("SELECT room_id, name, nick FROM channel_room WHERE channel_id = ?").get(node.id)
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if (room_id && useHTML) {
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return `<a href="https://matrix.to/#/${room_id}">#${nick || name}</a>`
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} else {
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return `#${nick || name}`
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}
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},
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role: node =>
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"@&" + node.id,
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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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/**
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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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*/
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async function messageToEvent(message, guild) {
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const events = []
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// Text content appears first
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if (message.content) {
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let content = message.content
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content = content.replace(/https:\/\/(?:ptb\.|canary\.|www\.)?discord(?:app)?\.com\/channels\/([0-9]+)\/([0-9]+)\/([0-9]+)/, (whole, guildID, channelID, messageID) => {
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const row = db.prepare("SELECT room_id, event_id FROM event_message INNER JOIN channel_room USING (channel_id) WHERE channel_id = ? AND message_id = ? AND part = 0").get(channelID, messageID)
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if (row) {
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return `https://matrix.to/#/${row.room_id}/${row.event_id}`
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} else {
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return `${whole} [event not found]`
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}
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})
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const html = markdown.toHTML(content, {
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discordCallback: getDiscordParseCallbacks(message, true)
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}, null, null)
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const body = markdown.toHTML(content, {
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discordCallback: getDiscordParseCallbacks(message, false),
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discordOnly: true,
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escapeHTML: false,
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}, null, null)
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const isPlaintext = body === html
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if (isPlaintext) {
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events.push({
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$type: "m.room.message",
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msgtype: "m.text",
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body: body
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})
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} else {
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events.push({
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$type: "m.room.message",
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msgtype: "m.text",
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body: body,
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format: "org.matrix.custom.html",
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formatted_body: html
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})
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}
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}
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// Then attachments
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const attachmentEvents = await Promise.all(message.attachments.map(async attachment => {
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// TODO: handle large files differently - link them instead of uploading
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if (attachment.content_type?.startsWith("image/") && attachment.width && attachment.height) {
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return {
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$type: "m.room.message",
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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.filename,
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// TODO: filename: attachment.filename and then use body as the caption
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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 {
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return {
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$type: "m.room.message",
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msgtype: "m.text",
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body: "Unsupported attachment:\n" + JSON.stringify(attachment, null, 2)
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}
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}
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}))
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events.push(...attachmentEvents)
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// Then stickers
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if (message.sticker_items) {
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const stickerEvents = await Promise.all(message.sticker_items.map(async stickerItem => {
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const format = file.stickerFormat.get(stickerItem.format_type)
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if (format?.mime) {
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let body = stickerItem.name
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const sticker = guild.stickers.find(sticker => sticker.id === stickerItem.id)
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if (sticker && sticker.description) body += ` - ${sticker.description}`
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return {
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$type: "m.sticker",
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body,
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info: {
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mimetype: format.mime
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},
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url: await file.uploadDiscordFileToMxc(file.sticker(stickerItem))
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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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msgtype: "m.text",
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body: "Unsupported sticker format. Name: " + stickerItem.name
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}
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}
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}))
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events.push(...stickerEvents)
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}
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return events
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}
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module.exports.messageToEvent = messageToEvent
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