juncture-digital.github.io/404.html at main · juncture-digital/juncture-digital.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">

  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <script>
      (function() {
        var baseUrl = ['4000', '4200'].includes(window.location.port) ? `http://localhost:${window.location.port}` : 'https://www.juncture-digital.io';
        document.head.append(Object.assign(document.createElement('link'), { rel: 'stylesheet', href: `${baseUrl}/css/juncture.css`} ))
        document.head.append(Object.assign(document.createElement('link'), { rel: 'stylesheet', href: `${baseUrl}/css/index.css`} ))
        window.dynamicBaseUrl = baseUrl;
      })();
    </script>

    <style>
      body { opacity: 0; transition: opacity 0.5s ease-in-out; max-width: 1000px; margin: auto; }
    </style>

  </head>

  <body>
    <main class="page-content">{{ content }}</main>

<script>
  const moved = new Set('audio header image map youtube'.split(' '))
  const pathRoot = location.pathname.split('/')[1]
  if (moved.has(pathRoot)) location.pathname = `/components/${pathRoot}`
</script>

<script src="https://cdn.jsdelivr.net/npm/js-yaml@4.1.0/dist/js-yaml.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/markdown-it@14.1.0/dist/markdown-it.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/markdown-it-attrs@4.3.1/markdown-it-attrs.browser.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/markdown-it-footnote@4.0.0/dist/markdown-it-footnote.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/markdown-it-deflist@3.0.0/dist/markdown-it-deflist.min.js"></script>
<script type="module">

  const addScript = async () => {
    var baseUrl = (window.location.port === '4200') ? 'http://localhost:4200' : 'https://www.juncture-digital.io';

    let [owner, repo, ...rest] = location.pathname.split('/').filter(p => p)
    rest = rest.filter(p => p !== 'undefined')
    let branch
    if (rest[0] === 'main' || rest[0] === 'master') branch = rest.shift()
    else {
      const repoBranches = await branches(owner, repo)
      if (repoBranches?.length === 1) branch = repoBranches[0]
      else branch = await defaultBranch(owner, repo)
    }
    let path = rest ? rest.join('/') : ''
    console.log(`addScript: owner=${owner}, repo=${repo}, branch=${branch}, rest=${rest}, path=${path}`)

    window.jekyll = {github: { owner_name: owner, repository_name: repo, source: { branch: branch } } }
    let ghbase = `${owner}/${repo}/${branch}/${path}`
    const scriptEl = Object.assign(document.createElement('script'), { id: 'loader', src: `${baseUrl}/js/juncture.js`} );

    scriptEl.dataset.ghbase = ghbase;
    document.body.append(scriptEl);
  }

  const branches = async (acct, repo) => {
    let resp = await fetch(`https://api.github.com/repos/${acct}/${repo}/branches`, {headers: { Accept: 'application/vnd.github+json' } })
    if (resp.ok) {
      resp = await resp.json()
      return resp.map(b => b.name)
    }
  }

  const defaultBranch = async (acct, repo) => {
    let defaultBranch = null
    let url = `https://api.github.com/repos/${acct}/${repo}`
    let resp = await fetch(url)
    if (resp.ok) {
      resp = await resp.json()
      defaultBranch = resp.default_branch
    }
    return defaultBranch
  }

  const getGhFile = async (acct, repo, branch, path) => {
    let url = `https://api.github.com/repos/${acct}/${repo}/contents/${path}?ref=${branch}`
    let resp = await fetch(url, {cache: 'no-cache'})
    if (resp.ok) {
      let payload = await resp.json()
      let content = decodeURIComponent(escape(atob(payload.content)))
      return {status: resp.status, content}
    } else if (resp.status === 403 || resp.status === 401) { // access problem, possibly api rate limit exceeded
      url = `https://raw.githubusercontent.com/${acct}/${repo}/${branch}/${path}`
      resp = await fetch(url)
      if (resp.ok) {
        let content = await resp.text()
        return {status: resp.status, content}
      } else {
        return {status: resp.status, content: null}
      }
    } else {
      return {status: resp.status, content: null}
    }
  }

  const getGhMarkdown = async (owner, repo, branch, path) => {
    let extension = path.slice(-3) === '.md' ? 'md' : ''
    // console.log(`getGhMarkdown: owner=${owner}, repo=${repo}, branch=${branch}, path=${path}, extension=${extension}`)
    if (extension === 'md') {
      let resp = await getGhFile(owner, repo, branch, path)
      return resp.content
    } else {
      let promises = [
        getGhFile(owner, repo, branch, path ? `${path}/index.md` : 'index.md'),
        getGhFile(owner, repo, branch, path ? `${path}/README.md` : 'README.md')
      ]
      if (path) promises.push(getGhFile(owner, repo, branch, `${path}.md`))
      return await Promise.all(promises).then(resp => {
        let found = resp.find(r => r?.status === 200)
        return found?.content || ''
      })
    }
  }

  const getLocalMarkdown = async () => {
    let href = location.href[location.href.length-1] === '/' ? location.href.slice(0,-1) : location.href
    let extension = location.pathname.slice(-3) === '.md' ? 'md' : ''
    if (extension === 'md') {
      let resp = await fetch(location.href)
      return resp.content
    } else {
      return await Promise.all([
        fetch(`${href}.md`),
        fetch(`${href}/README.md`),
        fetch(`${href}/index.md`)
      ]).then(resp => resp.find(r => r?.status === 200)?.text())
    }
  }

  let main = document.querySelector('main')

  let [owner, repo, ...rest] = location.pathname.split('/').filter(p => p)
  rest = rest.filter(p => p !== 'undefined')
  let branch
  if (rest[0] === 'main' || rest[0] === 'master') {
    branch = rest.shift()
  } else {
    const repoBranches = await branches(owner, repo)
    if (repoBranches?.length === 1) branch = repoBranches[0]
    else branch = await defaultBranch(owner, repo)
  }
  let path = rest ? rest.join('/') : ''
  window.jekyll = {github:{owner_name:owner,repository_name:repo,source:{branch:branch}}}

  console.log(`404: owner=${owner}, repo=${repo}, branch=${branch}, rest=${rest}, path=${path}`)
  history.pushState({}, '', path ? `/${owner}/${repo}/${branch}/${path}` : `/${owner}/${repo}/${branch}`);

  let markdown = await getGhMarkdown(owner, repo, branch, path)
  if (!markdown) markdown = await getLocalMarkdown()

  if (markdown) {
    const fmRegex = /^---\s*[\r\n]+([\s\S]*?)[\r\n]+---[\r\n]+/;

    // Match the front matter using the regex.
    const match = markdown.match(fmRegex);
    let frontMatter = {};

    if (match) {
      // Convert the captured front matter (YAML) into a JavaScript object.
      frontMatter = jsyaml.load(match[1]);
      // Remove the front matter block from the Markdown text.
      markdown = markdown.replace(fmRegex, '').replace(/\{#paragraph[0-9]+\}/g, '');
    }
    markdown = markdown.replace(/{#paragraph\d+}/g, '')

    const md = markdownit({ html: true })
      .use(markdownItAttrs, {leftDelimiter: '{:', rightDelimiter: '}'})
      .use(markdownitFootnote);

    let html = new DOMParser().parseFromString(md.render(markdown), 'text/html')
    let style = html.querySelector('style')
    let body = html.querySelector('body')

    // remove "editor" and "view as" buttons
    Array.from(body.querySelectorAll('a > img'))
      .find(img => img.src.indexOf('ve-button') > -1 || img.parentElement.href.indexOf('juncture-digital.org') > 0)
      ?.parentElement?.parentElement?.remove()

    Array.from(body.querySelectorAll('h1 + p, h2 + p, h3 + p, h4 + p, h5 + p, h6 + p'))
      .filter(p => !p.textContent)
      .forEach(p => {
        let heading = p.previousElementSibling
        if (p.id) heading.id = p.id
        p.classList.forEach(c => heading.classList.add(c))
        if (p.getAttribute('style')) heading.setAttribute('style', p.getAttribute('style'))
        p.remove()
      })

    main.setAttribute('style', 'padding:0 1em;' + (frontMatter['max-width'] ? ` max-width:${frontMatter['max-width']}; margin:0 auto;` : ''))
    main.innerHTML = (style ? `${style.outerHTML}\n` : '') + body.innerHTML

    addScript()

    /*
    let junctureScript = document.createElement('script')
    junctureScript.id = 'junctureScript';
    junctureScript.src = `${window.dynamicBaseUrl}/js/index.js`
    junctureScript.dataset.ghbase = `${owner}/${repo}/${branch}/${path}`
    junctureScript.type = 'module'
    document.body.appendChild(junctureScript)
    */

  } else {
    main.innerHTML = `<div class="container">
      <h1>404</h1>
      <p><strong>Page not found :(</strong></p>
      <p>The requested page could not be found.</p>
    </div>`
  }
</script>

</body>
</html>