Restore search page (vuejs#682)

* Restore search page

* Update search page

Author: NoelDeMartin

Diff for: src/.vuepress/components/search/index.vue

@@ -0,0 +1,258 @@
+<template>
+  <main id="search-page" class="DocSearch">
+
+    <p v-if="!isAlgoliaConfigured">
+      This search page is not available at the moment, please use the search box in the top navigation bar.
+    </p>
+
+    <template v-else>
+
+      <form role="search" class="DocSearch-Form" @submit="visitFirstResult">
+
+        <label class="DocSearch-MagnifierLabel" for="docsearch-input" id="docsearch-label">
+          <svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20">
+            <path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path>
+          </svg>
+        </label>
+
+        <input class="DocSearch-Input" id="docsearch-input" v-model="search" :placeholder="searchPlaceholder">
+
+      </form>
+
+      <div class="search-footer">
+
+        <p>
+          <template v-if="totalResults">
+            <strong>{{ totalResults }} results</strong> found in {{ queryTime }}ms
+          </template>
+        </p>
+
+        <div class="DocSearch-Logo">
+          <a href="https://www.algolia.com/docsearch" target="_blank" rel="noopener noreferrer">
+            <span class="DocSearch-Label">Search by</span>
+            <svg width="77" height="19">
+              <path d="M2.5067 0h14.0245c1.384.001 2.5058 1.1205 2.5068 2.5017V16.5c-.0014 1.3808-1.1232 2.4995-2.5068 2.5H2.5067C1.1232 18.9995.0014 17.8808 0 16.5V2.4958A2.495 2.495 0 01.735.7294 2.505 2.505 0 012.5068 0zM37.95 15.0695c-3.7068.0168-3.7068-2.986-3.7068-3.4634L34.2372.3576 36.498 0v11.1794c0 .2715 0 1.9889 1.452 1.994v1.8961zm-9.1666-1.8388c.694 0 1.2086-.0397 1.5678-.1088v-2.2934a5.3639 5.3639 0 00-1.3303-.1679 4.8283 4.8283 0 00-.758.0582 2.2845 2.2845 0 00-.688.2024c-.2029.0979-.371.2362-.4919.4142-.1268.1788-.185.2826-.185.5533 0 .5297.185.8359.5205 1.0375.3355.2016.7928.3053 1.365.3053v-.0008zm-.1969-8.1817c.7463 0 1.3768.092 1.8856.2767.5088.1838.9195.4428 1.2204.7717.3068.334.5147.7777.6423 1.251.1327.4723.196.991.196 1.5603v5.798c-.5235.1036-1.05.192-1.5787.2649-.7048.1037-1.4976.156-2.3774.156-.5832 0-1.1215-.0582-1.6016-.167a3.385 3.385 0 01-1.2432-.5364 2.6034 2.6034 0 01-.8037-.9565c-.191-.3922-.29-.9447-.29-1.5208 0-.5533.11-.905.3246-1.2863a2.7351 2.7351 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+            </svg>
+          </a>
+        </div>
+
+      </div>
+
+      <template v-if="results.length">
+
+        <div v-for="(result, i) in results" :key="i" class="search-result">
+          <a class="title" :href="result.url" v-html="result.title" />
+          <p v-if="result.summary" class="summary" v-html="result.summary" />
+          <div class="breadcrumbs">
+            <span v-for="(breadcrumb, j) in result.breadcrumbs" :key="j" class="breadcrumb" v-html="breadcrumb" />
+          </div>
+        </div>
+
+      </template>
+
+      <p v-else-if="search">No results found for query "<span v-text="search" />".</p>
+
+      <div ref="infiniteScrollAnchor"></div>
+
+    </template>
+
+  </main>
+</template>
+
+<script>
+export default {
+
+  data () {
+    return {
+      algoliaIndex: undefined,
+      infiniteScrollObserver: undefined,
+      searchPlaceholder: undefined,
+      search: '',
+      results: [],
+      totalResults: 0,
+      totalPages: 0,
+      lastPage: 0,
+      queryTime: 0
+    }
+  },
+
+  computed: {
+    algoliaOptions () {
+      return this.$themeConfig.algolia || {}
+    },
+
+    isAlgoliaConfigured () {
+      return this.algoliaOptions && this.algoliaOptions.apiKey && this.algoliaOptions.indexName
+    }
+  },
+
+  watch: {
+    $lang (newValue) {
+      this.initializeAlgoliaIndex(this.algoliaOptions, newValue)
+    },
+
+    algoliaOptions (newValue) {
+      this.initializeAlgoliaIndex(newValue, this.$lang)
+    },
+
+    search () {
+      this.refreshSearchResults()
+
+      window.history.pushState(
+        {},
+        'Vue.js Search',
+        window.location.origin + window.location.pathname + '?q=' + encodeURIComponent(this.search)
+      )
+    }
+  },
+
+  mounted () {
+    this.search = (new URL(location)).searchParams.get('q') || '';
+
+    if (!this.isAlgoliaConfigured)
+      return;
+
+    this.searchPlaceholder = this.$themeConfig.searchPlaceholder || 'Search Vue.js'
+    this.initializeAlgoliaIndex(this.algoliaOptions, this.$lang)
+    this.initializeInfiniteScrollObserver()
+  },
+
+  destroyed () {
+    if (!this.infiniteScrollObserver)
+      return;
+
+    this.infiniteScrollObserver.disconnect()
+  },
+
+  methods: {
+    async initializeAlgoliaIndex (userOptions, lang) {
+      const { default: algoliasearch } = await import(/* webpackChunkName: "search-page" */ 'algoliasearch')
+      const client = algoliasearch(this.algoliaOptions.appId, this.algoliaOptions.apiKey);
+
+      this.algoliaIndex = client.initIndex(this.algoliaOptions.indexName);
+
+      this.refreshSearchResults()
+    },
+
+    async initializeInfiniteScrollObserver() {
+      await import(/* webpackChunkName: "search-page" */ 'intersection-observer')
+
+      this.infiniteScrollObserver = new IntersectionObserver(([{ isIntersecting }]) => {
+        if (!isIntersecting || this.totalResults === 0 || this.totalPages === this.lastPage + 1)
+          return
+
+        this.lastPage++
+        this.updateSearchResults()
+      })
+
+      this.infiniteScrollObserver.observe(this.$refs.infiniteScrollAnchor)
+    },
+
+    async updateSearchResults() {
+      if (!this.search || !this.algoliaIndex)
+        return
+
+      const response = await this.algoliaIndex.search(this.search, { page: this.lastPage })
+
+      this.results.push(...response.hits.map(hit => this.parseSearchHit(hit)))
+      this.totalResults = response.nbHits
+      this.totalPages = response.nbPages
+      this.queryTime = response.processingTimeMS
+    },
+
+    refreshSearchResults() {
+      this.results = []
+      this.totalResults = 0
+      this.totalPages = 0
+      this.lastPage = 0
+      this.queryTime = 0
+
+      this.updateSearchResults()
+    },
+
+    visitFirstResult(e) {
+      e.preventDefault()
+
+      if (this.results.length === 0)
+        return;
+
+      window.location = this.results[0].url
+    },
+
+    parseSearchHit(hit) {
+      const hierarchy = hit._highlightResult.hierarchy
+      const titles = []
+
+      let summary, levelName, level = 0
+      while ((levelName = 'lvl' + level++) in hierarchy) {
+        titles.push(hierarchy[levelName].value)
+      }
+
+      if (hit._snippetResult && hit._snippetResult.content) {
+        summary = hit._snippetResult.content.value + '...'
+      }
+
+      return {
+        title: titles.pop(),
+        url: hit.url,
+        summary: summary,
+        breadcrumbs: titles,
+      }
+    }
+  }
+}
+</script>
+
+<style lang="scss">
+@import "@theme/styles/_settings.scss";
+
+#search-page {
+
+  .search-footer {
+    display: flex;
+    height: 35px;
+    align-items: center;
+    justify-content: space-between;
+    margin-bottom: 12px;
+
+    p {
+      margin: 0;
+      padding: 0;
+      font-size: .9rem;
+    }
+
+    .DocSearch-Logo a:hover {
+      text-decoration: none;
+    }
+
+  }
+
+  .search-result {
+    margin-bottom: 15px;
+
+    .title {
+      display: block;
+    }
+
+    .summary {
+      padding: 0;
+      margin: 0;
+      font-size: .9rem;
+    }
+
+    .breadcrumb {
+      font-size: .9rem;
+      color: $light;
+
+      & + .breadcrumb::before {
+        content: "\203A\A0";
+        margin-left: 5px;
+        color: $light;
+      }
+
+    }
+
+  }
+
+}
+</style>

Diff for: src/.vuepress/config.js

@@ -405,6 +405,7 @@ module.exports = {
     smoothScroll: false,
     algolia: {
       indexName: 'vuejs-v3',
+      appId: 'BH4D9OD16A',
       apiKey: 'bc6e8acb44ed4179c30d0a45d6140d3f'
     }
   },

Diff for: src/search/README.md

@@ -0,0 +1,3 @@
+# Search Vue.js
+
+<search-index/>