fedi-imagebot/main.ts
2023-01-03 21:01:48 +01:00

97 lines
2.8 KiB
TypeScript

const MASTODON_INSTANCE_URL = Deno.env.get('MASTODON_INSTANCE_URL') // e.g. https://botsin.space
const MASTODON_ACCESS_TOKEN = Deno.env.get('MASTODON_ACCESS_TOKEN') // you can get this at $INSTANCE_URL/settings/applications
// first we need to find out which files we can post, and which ones we already
// have posted
console.log('Picking file to post…')
const alreadyPostedFiles = new Set()
for await (const dirEntry of Deno.readDir("./posts/.posted")) {
if (dirEntry.isSymlink) {
alreadyPostedFiles.add(dirEntry.name)
}
}
const availableFiles = []
for await (const dirEntry of Deno.readDir("./posts/")) {
if (dirEntry.name === '.gitignore') continue
if (dirEntry.isFile && !alreadyPostedFiles.has(dirEntry.name)) {
availableFiles.push(dirEntry.name)
}
}
console.log(`Found ${availableFiles.length} files which are not yet posted`)
if (availableFiles.length === 0) {
console.log('Nothing left to post at the moment. Bye!')
Deno.exit()
}
const fileToPost = availableFiles[Math.floor(Math.random() * availableFiles.length)]
const bytes = await Deno.readFile(`./posts/${fileToPost}`)
// we need two requests
// 1. upload media
// 2. create status with media id
// see https://docs.joinmastodon.org/methods/media/#v2
const mediaData = new FormData()
mediaData.append('file', new Blob([bytes]))
type MediaResponse = {
'id': string
'type': string
'url': string
'preview_url': string
'remote_url': null,
'text_url': string
'meta': {
'focus': {
'x': number
'y': number
},
'original': {
'width': number
'height': number
'size': string
'aspect': number
},
'small': {
'width': number
'height': number
'size': string
'aspect': number
}
},
'description': string
'blurhash': string
}
console.log('Sending post request to', `${MASTODON_INSTANCE_URL}/api/v2/media`)
const mediaRequest = await fetch(`${MASTODON_INSTANCE_URL}/api/v2/media`, {
method: 'POST',
headers: {
Authorization: `Bearer ${MASTODON_ACCESS_TOKEN}`
},
body: mediaData
}).then(res => res.json()) as unknown as MediaResponse
console.log('mediaRequest', mediaRequest)
// see https://docs.joinmastodon.org/methods/statuses/#create
const statusData = new FormData()
statusData.append('media_ids[]', mediaRequest.id)
console.log('Sending post request to', `${MASTODON_INSTANCE_URL}/api/v1/statuses`)
const statusRequest = await fetch(`${MASTODON_INSTANCE_URL}/api/v1/statuses`, {
method: 'POST',
headers: {
Authorization: `Bearer ${MASTODON_ACCESS_TOKEN}`
},
body: statusData
}).then(res => res.json())
console.log('statusRequest', statusRequest)
console.log('Linking posted file so we can skip it in the future…')
await Deno.symlink(`./posts/${fileToPost}`, `./posts/.posted/${fileToPost}`)
console.log('Done!')