multi-account-post-schedule-mastodon/wip/recommandations_curator.mjs

// selectionner un compte parmi les gens suivis dans une liste

// export des abonnements utilisateur https://mastodon.cipherbliss.com/settings/exports/follows.csv/home/cipherbliss/Nextcloud/inbox/following_accounts.csv

import axios from 'axios'
import Masto from 'mastodon'

/**
 * picture generation
 */
import Jimp from 'jimp'
import { getRequestOptions, sendGetRequest } from '../helpers/libs/utils.mjs'
import fs from 'fs'
import path from 'path'

let reallySendPost = false
reallySendPost = true

async function getFollowers (username, instance) {
	const url = `${instance}/api/v1/accounts/${username}/following`

	try {
		const response = await axios.get(url)

		return response.data
	} catch (error) {
		console.error(error)
	}
}

// Function to look up the user account number using webfinger
async function getUserAccountNumberFromMastodonUsername (username) {
	const parsedUsername = username.split('@')
	if (parsedUsername.length !== 2) {
		throw new Error('Invalid Mastodon username format.')
	}

	const localPart = parsedUsername[0]
	const domain = parsedUsername[1]
	console.log('localPart, domain', localPart, domain)

	const acctPath = '/.well-known/webfinger?resource=' + encodeURIComponent('acct:' + localPart + '@' + domain)
	const options = getRequestOptions(domain, 443, acctPath)

	console.log('options', options)
	try {
		const fingerResult = await sendGetRequest(options)
		const actorResource = fingerResult['subject'] || fingerResult.links?.find((item) => item.rel === 'self').href

		if (!actorResource) {
			throw new Error('Failed to obtain the resource identifier.')
		}

		const accountHost = actorResource.split('/')[2]
		const accountPath = actorResource.split('/').pop()

		const accountInfoReqOptions = getRequestOptions(accountHost, 443, '/api/v1/accounts/' + accountPath)
		const accountInfo = await sendGetRequest(accountInfoReqOptions)

		return accountInfo.id
	} catch (error) {
		throw error
	}
}

async function main () {

	const userIdOnInstance = '1'

	const instance = 'mastodon.cipherbliss.com'

	const followers = await getFollowers(userIdOnInstance, instance)

	console.log('followers.length', followers.length)
	
	const randomFollowers = followers?.sort(() => Math.random() - 0.5)?.slice(0, 3)

	// console.log('Random followers:', randomFollowers)
	let message = '\n	Les personnes que l\'on vous recommande de suivre aujourd\'hui:'

	let avatars_urls = []
	randomFollowers.forEach(account => {
		message += '\n' + displayDataAboutFollower(account)

		console.log('account', account)
		avatars_urls.push(account.avatar_static)
	})
	message += '\n #fedifollows #curatorRecommendations'

	generateAvatarComposite(avatars_urls)
	return message
}

/**
 * displays username, acct, avatar and url for one account
 * @param follower
 */
function displayDataAboutFollower (follower) {

	let text = ''
	if (follower.note) {
		text = follower.note.trim().substring(0, 150)
		if (follower.note.trim() > 150) {
			text += '...'
		}
	}
	return ` * _${follower.display_name}_: [${follower.acct}](${follower.url}) 
	  ${text.trim()}`

}

let folderUnpublished = ''
let compositeFileName = ''

// Function to maintain aspect ratio while scaling an image down.
function scaleDownPreserveAspectRatio (image, newWidth, newHeight) {
	const originalWidth = image.bitmap.width
	const originalHeight = image.bitmap.height

	const scaleFactor = Math.min(newWidth / originalWidth, newHeight / originalHeight)

	const newWidthScaled = Math.round(originalWidth * scaleFactor)
	const newHeightScaled = Math.round(originalHeight * scaleFactor)

	return image.scaleToFit(newWidthScaled, newHeightScaled)
}

/**
 * Prend trois URL d'image d'avatar et génère une image composite JPG avec celles-ci,
 * enregistrée sous le format «YYYY-MM-DDTHH-MM-SS.jpg».
 */
async function generateAvatarComposite (avatarUrls) {
	if (!Array.isArray(avatarUrls) || avatarUrls.length !== 3) {
		throw new Error('Veuillez fournir exactement trois URL d’avatar.')
	}

	// Télécharger chaque avatar
	const avatarImagesPromises = avatarUrls.map((url) => downloadImage(url))
	const avatarImages = await Promise.all(avatarImagesPromises)

	// Combiner les images horizontalement
	// Resize avatars to a consistent dimension of 400x400 pixels while maintaining aspect ratio
	const resizedAvatarImages = avatarImages.map((image) => scaleDownPreserveAspectRatio(image, 400, 400))

	// Combine the images horizontally
	const combinedWidth = 3 * resizedAvatarImages[0].bitmap.width
	const combinedHeight = Math.max(...resizedAvatarImages.map((image) => image.bitmap.height))
	const composite = new Jimp(combinedWidth, combinedHeight)

	for (let i = 0; i < resizedAvatarImages.length; i++) {
		const xOffset = i * resizedAvatarImages[0].bitmap.width
		composite.composite(resizedAvatarImages[i], xOffset, 0)
	}

	// Enregistrer l'image composite
	compositeFileName = `avatars_reccommendations_${Date.now().toString()}.jpg`
	await composite.writeAsync(compositeFileName)
	console.log(`L'image composite a été enregistrée sous le nom "${compositeFileName}".`)
	return compositeFileName

}

/**
 * Télécharge une image depuis l'URL spécifiée et renvoie une instance Jimp.
 */
async function downloadImage (url) {
	return await Jimp.read(url)
}

function publishOnMastodon (folderUnpublished, configPost) {

	let accessToken = process.env['TOKEN_' + configPost.author.toUpperCase()]
	console.log('accessToken', accessToken)
	const masto = new Masto({
		access_token: accessToken,
		api_url: process.env.INSTANCE_MASTODON + '/api/v1/',
	})

	if (configPost.reallySendPost) {

		let imagePath = path.resolve() + configPost.image
		console.log('imagePath', imagePath)
		/**
		 * poster le média, puis faire un toot avec le média lié
		 */
		masto.post('media', { file: fs.createReadStream(imagePath) })
			.then(resp => {
				let id = resp.data.id
				configPost.media_ids = [id]
				console.log('\n\n id du média pour le post:', id)
				masto.post('statuses', configPost).then(rep => {
					// console.log('rep', rep)
					console.log(`\n\n posté avec une nouvelle image, ${configPost.image} WOOT`)
				}, err => {
					console.error(err)
					console.log('\n\n erreur T_T')
				})
			}, err => {
				console.error(err)
			})
	} else {
		console.log('envoi désactivé avec configPost.reallySendPost')
	}
}

/**
 * run all
 */

main().then(message => {
	// let md_message = convertHTMLtoMD(message)
	let md_message = message.trim() + '\n'
	console.log('md_message', md_message)
	// upload de fileName et création du post par le Curator
	let configPost = {
		author: 'curator',
		website: 'cipherbliss',
		postObject: {},
		folder_image: '.',
		image: compositeFileName,
		message: md_message,
		reallySendPost
	}

	publishOnMastodon(folderUnpublished, configPost)

}, err => {
	console.error(err)
})