out-of-your-element/m2d/converters/utils.js

33 lines
1.4 KiB
JavaScript

// @ts-check
const reg = require("../../matrix/read-registration")
const userRegex = reg.namespaces.users.map(u => new RegExp(u.regex))
/**
* Determine whether an event is the bridged representation of a discord message.
* Such messages shouldn't be bridged again.
* @param {string} sender
*/
function eventSenderIsFromDiscord(sender) {
// If it's from a user in the bridge's namespace, then it originated from discord
// This includes messages sent by the appservice's bot user, because that is what's used for webhooks
// TODO: It would be nice if bridge system messages wouldn't trigger this check and could be bridged from matrix to discord, while webhook reflections would remain ignored...
// TODO that only applies to the above todo: But you'd have to watch out for the /icon command, where the bridge bot would set the room avatar, and that shouldn't be reflected into the room a second time.
if (userRegex.some(x => sender.match(x))) {
return true
}
return false
}
/**
* @param {string} mxc
* @returns {string?}
*/
function getPublicUrlForMxc(mxc) {
const avatarURLParts = mxc?.match(/^mxc:\/\/([^/]+)\/(\w+)$/)
if (avatarURLParts) return `https://matrix.cadence.moe/_matrix/media/r0/download/${avatarURLParts[1]}/${avatarURLParts[2]}`
else return null
}
module.exports.eventSenderIsFromDiscord = eventSenderIsFromDiscord
module.exports.getPublicUrlForMxc = getPublicUrlForMxc