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m->d: Support attachment body data as alt text

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Cadence Ember 2024-01-06 19:42:13 +13:00
parent 60cf40680f
commit 84d791cd8a
3 changed files with 48 additions and 6 deletions
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9
m2d/converters/event-to-message.js
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@ -535,19 +535,22 @@ async function eventToMessage(event, guild, di) {
}
} else if (event.type === "m.room.message" && (event.content.msgtype === "m.file" || event.content.msgtype === "m.video" || event.content.msgtype === "m.audio" || event.content.msgtype === "m.image")) {
content = ""
const filename = event.content.body
const filename = event.content.filename || event.content.body
// A written `event.content.body` will be bridged to Discord's image `description` which is like alt text.
// Bridging as description rather than message content in order to match Matrix clients (Element, Neochat) which treat this as alt text or title text.
const description = (event.content.body !== event.content.filename && event.content.filename && event.content.body) || undefined
if ("url" in event.content) {
// Unencrypted
const url = mxUtils.getPublicUrlForMxc(event.content.url)
assert(url)
attachments.push({id: "0", filename})
attachments.push({id: "0", description, filename})
pendingFiles.push({name: filename, url})
} else {
// Encrypted
const url = mxUtils.getPublicUrlForMxc(event.content.file.url)
assert(url)
assert.equal(event.content.file.key.alg, "A256CTR")
attachments.push({id: "0", filename})
attachments.push({id: "0", description, filename})
pendingFiles.push({name: filename, url, key: event.content.file.key.k, iv: event.content.file.iv})
}
} else if (event.type === "m.sticker") {