Site updated: 2024-05-04 21:29:53

js/search/algolia.js

@@ -0,0 +1,177 @@
+window.addEventListener('load', () => {
+  const $searchMask = document.getElementById('search-mask')
+  const $searchDialog = document.querySelector('#algolia-search .search-dialog')
+
+  const openSearch = () => {
+    const bodyStyle = document.body.style
+    bodyStyle.width = '100%'
+    bodyStyle.overflow = 'hidden'
+    btf.animateIn($searchMask, 'to_show 0.5s')
+    btf.animateIn($searchDialog, 'titleScale 0.5s')
+    setTimeout(() => { document.querySelector('#algolia-search .ais-SearchBox-input').focus() }, 100)
+
+    // shortcut: ESC
+    document.addEventListener('keydown', function f (event) {
+      if (event.code === 'Escape') {
+        closeSearch()
+        document.removeEventListener('keydown', f)
+      }
+    })
+
+    fixSafariHeight()
+    window.addEventListener('resize', fixSafariHeight)
+  }
+
+  const closeSearch = () => {
+    const bodyStyle = document.body.style
+    bodyStyle.width = ''
+    bodyStyle.overflow = ''
+    btf.animateOut($searchDialog, 'search_close .5s')
+    btf.animateOut($searchMask, 'to_hide 0.5s')
+    window.removeEventListener('resize', fixSafariHeight)
+  }
+
+  // fix safari
+  const fixSafariHeight = () => {
+    if (window.innerWidth < 768) {
+      $searchDialog.style.setProperty('--search-height', window.innerHeight + 'px')
+    }
+  }
+
+  const searchClickFn = () => {
+    btf.addEventListenerPjax(document.querySelector('#search-button > .search'), 'click', openSearch)
+  }
+
+  const searchFnOnce = () => {
+    $searchMask.addEventListener('click', closeSearch)
+    document.querySelector('#algolia-search .search-close-button').addEventListener('click', closeSearch)
+  }
+
+  const cutContent = content => {
+    if (content === '') return ''
+
+    const firstOccur = content.indexOf('<mark>')
+
+    let start = firstOccur - 30
+    let end = firstOccur + 120
+    let pre = ''
+    let post = ''
+
+    if (start <= 0) {
+      start = 0
+      end = 140
+    } else {
+      pre = '...'
+    }
+
+    if (end > content.length) {
+      end = content.length
+    } else {
+      post = '...'
+    }
+
+    const matchContent = pre + content.substring(start, end) + post
+    return matchContent
+  }
+
+  const algolia = GLOBAL_CONFIG.algolia
+  const isAlgoliaValid = algolia.appId && algolia.apiKey && algolia.indexName
+  if (!isAlgoliaValid) {
+    return console.error('Algolia setting is invalid!')
+  }
+
+  const search = instantsearch({
+    indexName: algolia.indexName,
+    /* global algoliasearch */
+    searchClient: algoliasearch(algolia.appId, algolia.apiKey),
+    searchFunction (helper) {
+      helper.state.query && helper.search()
+    }
+  })
+
+  const configure = instantsearch.widgets.configure({
+    hitsPerPage: 5
+  })
+
+  const searchBox = instantsearch.widgets.searchBox({
+    container: '#algolia-search-input',
+    showReset: false,
+    showSubmit: false,
+    placeholder: GLOBAL_CONFIG.algolia.languages.input_placeholder,
+    showLoadingIndicator: true
+  })
+
+  const hits = instantsearch.widgets.hits({
+    container: '#algolia-hits',
+    templates: {
+      item (data) {
+        const link = data.permalink ? data.permalink : (GLOBAL_CONFIG.root + data.path)
+        const result = data._highlightResult
+        const content = result.contentStripTruncate
+          ? cutContent(result.contentStripTruncate.value)
+          : result.contentStrip
+            ? cutContent(result.contentStrip.value)
+            : result.content
+              ? cutContent(result.content.value)
+              : ''
+        return `
+          <a href="${link}" class="algolia-hit-item-link">
+          <span class="algolia-hits-item-title">${result.title.value || 'no-title'}</span>
+          <p class="algolia-hit-item-content">${content}</p>
+          </a>`
+      },
+      empty: function (data) {
+        return (
+          '<div id="algolia-hits-empty">' +
+          GLOBAL_CONFIG.algolia.languages.hits_empty.replace(/\$\{query}/, data.query) +
+          '</div>'
+        )
+      }
+    }
+  })
+
+  const stats = instantsearch.widgets.stats({
+    container: '#algolia-info > .algolia-stats',
+    templates: {
+      text: function (data) {
+        const stats = GLOBAL_CONFIG.algolia.languages.hits_stats
+          .replace(/\$\{hits}/, data.nbHits)
+          .replace(/\$\{time}/, data.processingTimeMS)
+        return (
+          `<hr>${stats}`
+        )
+      }
+    }
+  })
+
+  const powerBy = instantsearch.widgets.poweredBy({
+    container: '#algolia-info > .algolia-poweredBy'
+  })
+
+  const pagination = instantsearch.widgets.pagination({
+    container: '#algolia-pagination',
+    totalPages: 5,
+    templates: {
+      first: '<i class="fas fa-angle-double-left"></i>',
+      last: '<i class="fas fa-angle-double-right"></i>',
+      previous: '<i class="fas fa-angle-left"></i>',
+      next: '<i class="fas fa-angle-right"></i>'
+    }
+  })
+
+  search.addWidgets([configure, searchBox, hits, stats, powerBy, pagination]) // add the widgets to the instantsearch instance
+
+  search.start()
+
+  searchClickFn()
+  searchFnOnce()
+
+  window.addEventListener('pjax:complete', () => {
+    !btf.isHidden($searchMask) && closeSearch()
+    searchClickFn()
+  })
+
+  window.pjax && search.on('render', () => {
+    window.pjax.refresh(document.getElementById('algolia-hits'))
+  })
+})