Bluesky media downloader

Download media from Bluesky
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// ==UserScript==
// @name           Bluesky media downloader
// @description    Download media from Bluesky
// @version        0.1.2
// @author         sanadan <[email protected]>
// @namespace      https://javelin.works
// @match          https://bsky.app/*
// @grant          GM_download
// @grant          GM_getValue
// @grant          GM_setValue
// @license        MIT
// ==/UserScript==

const BMD = (function () {
  'use strict'

  let history
  return {
    init: async function () {
      history = await GM_getValue('download_history', [])
      const observer = new MutationObserver(ms => ms.forEach(m => m.addedNodes.forEach(node => this.detect(node))))
      observer.observe(document.body, { childList: true, subtree: true })
    },
    detect: function(node) {
      if (node.nodeName === "#text") return

      const img = node.querySelector('img[fetchpriority]')
      if (!img || !img.src.includes('/feed_thumbnail/')) return

      if (location.href.includes('/post/')) {
        const article = img.closest('div[data-testid]')
        if (article) {
          this.addButton(article)
          return
        }
      }

      const article2 = img.closest('div[data-testid="contentHider-post"]')
      if (article2) this.addButton2(article2.parentElement)
    },
    addButton: function (article) {
      if (article.querySelector('.bmd')) return // 既に追加されている

      const images = article.querySelectorAll('img[fetchpriority]')
      let sources = []
      images.forEach((img) => {
        const url = img.src.replace('/feed_thumbnail/', '/feed_fullsize/')
        sources.push(url)
      })
      const source = sources.join(',')
      const imageId = sources[0].match(/plc:(.+?)@/)[1]
      const type = sources[0].split('@')[1]
      const author = article.querySelector('div[role="link"]').textContent
      let postText = ''
      const post = article.children[1].children[0]
      if (post) {
        postText = this.splitPost(post.textContent)
      }
      let date = ''
      const dateElement = article.querySelector('a[data-tooltip]')
      if (dateElement) date = this.fromDate(dateElement.dataset.tooltip)
      else date = this.fromDate(article.children[1].children[1].children[0].textContent)

      const element = document.createElement('div')
      const postId = new URL(location.href).pathname.split('/').pop()
      element.innerHTML = history.includes(postId) ? this.check_svg : this.download_svg
      element.classList.add('bmd')
      element.style.cursor = 'pointer'
      element.dataset.source = source
      element.dataset.author = author
      element.dataset.date = date
      element.dataset.postText = postText
      element.dataset.type = type
      element.dataset.postId = postId
      element.onclick = (event) => {
        event.preventDefault()
        this.download(element)
      }
      let base = article.children[1].children[3]
      if (base) base = base.children[0]
      else base = article.children[1].children[1].children[3]
      base.appendChild(element)
    },
    addButton2: function (article) {
      if (article.querySelector('.bmd')) return // 既に追加されている

      const images = article.querySelectorAll('img[fetchpriority]')

      let sources = []
      images.forEach((img) => {
        const url = img.src.replace('/feed_thumbnail/', '/feed_fullsize/')
        sources.push(url)
      })
      let source = sources[0]
      if (images[0].closest('button')) {
        source = sources.join(',')
      }

      const imageId = sources[0].match(/plc:(.+?)@/)[1]
      const type = sources[0].split('@')[1]
      const authorBase = article.querySelectorAll('a[role="link"]')
      const author = authorBase[0].textContent
      let postText = ''
      const post = article.querySelector('div[data-testid="postText"]')
      if (post) {
        postText = this.splitPost(post.textContent)
      }
      const dateElement = article.querySelector('a[data-tooltip]')
      const date = this.fromDate(dateElement.dataset.tooltip)
      const element = document.createElement('div')
      const postId = new URL(dateElement.href).pathname.split('/').pop()
      element.innerHTML = history.includes(postId) ? this.check_svg : this.download_svg
      element.classList.add('bmd')
      element.style.cursor = 'pointer'
      element.dataset.source = source
      element.dataset.author = author
      element.dataset.date = date
      element.dataset.postText = postText
      element.dataset.type = type
      element.dataset.postId = postId
      element.onclick = (event) => {
        event.preventDefault()
        this.download(element)
      }
      const base = article.querySelector('div[data-testid="contentHider-post"]+div')
      if (base) {
        base.appendChild(element)
        return
      }
    },
    splitPost: function (str) {
      if (str === '') return ''
      return this.replace(str).match(/.+?([\n!！。？]|$)/)[0].split('\n')[0]
    },
    fromDate: function (str) {
      console.log(str)
      const items = str.split(/[\s年月日:]/)
      const year = items[0]
      const month = ('0' + items[1]).slice(-2)
      const day = ('0' + items[2]).slice(-2)
      const hour = this.zeroPadding(items[4])
      const minute = items[5].slice(0, 2)
      return `${year}-${month}-${day}_${hour}-${minute}`
    },
    zeroPadding: function (str) {
      return ('0' + str).slice(-2)
    },
    replace: function (str) {
      const invalidChars = { '#': '＃', '\\': '＼', '\/': '／', '\|': '｜', '<': '＜', '>': '＞', ':': '：', '*': '＊', '?': '？', '"': '＂', '\u202a': '', '\u202c': '' }
      return str.replace(/[#\\/|<>:*?"\u202a\u202c]/gu, v => invalidChars[v])
    },
    download: function (element) {
      const sources = element.dataset.source.split(',')
      const author = this.replace(element.dataset.author)
      const date = element.dataset.date
      const postText = this.replace(element.dataset.postText)
      const type = element.dataset.type
      const postId = element.dataset.postId
      let baseName = `cg/${author}/${date}`
      if (postText !== '') baseName += `_${postText}`
      const count = sources.length
      element.innerHTML = this.spinner_svg
      sources.forEach((source, index) => {
        let fileName = baseName
        if (count > 1) fileName += `_${index + 1}`
        fileName += `.${type}`
        GM_download(source, fileName)
      })
      if (!history.includes(postId)) {
        history.unshift(postId)
        GM_setValue('download_history', history)
      }
      element.innerHTML = this.check_svg
    },
    download_svg: `
<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" version="1.1" xml:space="preserve">
 <g>
  <title>Layer 1</title>
  <path class="st0" d="m12,16.2522a1,1 0 0 0 0.70781,-0.29297l4.5,-4.5a1.00017,1.00017 0 1 0 -1.41562,-1.41328l-2.79141,2.7914l0,-8.83594a1.00078,1.00078 0 1 0 -2.00156,0l0,8.83594l-2.79141,-2.7914a1.00017,1.00017 0 0 0 -1.41562,1.41328l4.5,4.5a1,1 0 0 0 0.70781,0.29297zm-8.22187,-4.4772a1,1 0 0 1 1.22109,0.975l0,6.25078l14.00156,0l0,-6.25078a1,1 0 1 1 1.99922,0l0,7.24922a1,1 0 0 1 -1.00078,1.00078l-15.99844,0a1,1 0 0 1 -1.00078,-1.00078l0,-7.24922a1,1 0 0 1 0.77813,-0.975z" fill="#73859d" id="svg_2"/>
 </g>
</svg>
`,
    check_svg: `
<svg version="1.1" id="_x32_" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 512 512" style="width: 16px; height: 16px; opacity: 1;" xml:space="preserve">
<style type="text/css">
	.st0{fill:#4B4B4B;}
</style>
<g>
	<polygon class="st0" points="440.469,73.413 218.357,295.525 71.531,148.709 0,220.229 146.826,367.055 218.357,438.587
		289.878,367.055 512,144.945 	" style="fill: rgb(0, 128, 0);"></polygon>
</g>
</svg>
`,
    spinner_svg: `
<svg style="width: 16px; height: 16px;" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><g><rect x="11" y="1" width="2" height="5" opacity=".14"/><rect x="11" y="1" width="2" height="5" transform="rotate(30 12 12)" opacity=".29"/><rect x="11" y="1" width="2" height="5" transform="rotate(60 12 12)" opacity=".43"/><rect x="11" y="1" width="2" height="5" transform="rotate(90 12 12)" opacity=".57"/><rect x="11" y="1" width="2" height="5" transform="rotate(120 12 12)" opacity=".71"/><rect x="11" y="1" width="2" height="5" transform="rotate(150 12 12)" opacity=".86"/><rect x="11" y="1" width="2" height="5" transform="rotate(180 12 12)"/><animateTransform attributeName="transform" type="rotate" calcMode="discrete" dur="0.75s" values="0 12 12;30 12 12;60 12 12;90 12 12;120 12 12;150 12 12;180 12 12;210 12 12;240 12 12;270 12 12;300 12 12;330 12 12;360 12 12" repeatCount="indefinite"/></g></svg>
`,
  }
})()

BMD.init()
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