added spinned

static/skin/index.js

@@ -5,11 +5,12 @@
         count: viewPortToCount()
     };
     const filterTypes = ['lang', 'category', 'q'];
+    const bookMap = new Map();
     let iso;
     let isFetching = false;
     let noResultInjected = false;
     let params = new URLSearchParams(window.location.search);
-    let bookMap = {};
+    let timer;
 
     function queryUrlBuilder() {
         let url = `${root}/catalog/search?`;
@@ -34,18 +35,18 @@
         const link = book.querySelector('link').getAttribute('href');
         const title =  getInnerHtml(book, 'title');
         const description = getInnerHtml(book, 'summary');
-        const linkTag = document.createElement('a');
         const id = getInnerHtml(book, 'id');
         const iconUrl = getInnerHtml(book, 'icon');
         const articleCount = getInnerHtml(book, 'articleCount');
         const mediaCount = getInnerHtml(book, 'mediaCount');
+
+        const linkTag = document.createElement('a');
         linkTag.setAttribute('class', 'book');
         linkTag.setAttribute('data-id', id);
         linkTag.setAttribute('href', link);
         if (sort) {
             linkTag.setAttribute('data-idx', bookMap[id]);
         }
-
         linkTag.innerHTML = `<div class='book__background' style="background-image: url('${iconUrl}');">
             <div class='book__title' title='${title}'>${title}</div>
             <div class='book__description' title='${description}'>${description}</div>
@@ -54,17 +55,32 @@
         return linkTag;
     }
 
+    function toggleFooter(show=false) {
+        const footer = document.getElementById('kiwixfooter');
+        if (footer.style.display === 'none' && show) {
+            footer.style.display = 'block';
+        } else if (footer.style.display !== 'none' && !show) {
+            footer.style.display = 'none';
+        }
+    }
+
     async function loadBooks() {
+        const loader = document.querySelector('.loader');
+        loader.style.display = 'block';
         return await fetch(queryUrlBuilder()).then(async (resp) => {
             const data = new window.DOMParser().parseFromString(await resp.text(), 'application/xml');
             const books = data.querySelectorAll('entry');
             books.forEach((book, idx) => {
-                bookMap[getInnerHtml(book, 'id')] = idx;
+                bookMap.set(getInnerHtml(book, 'id'), idx);
             });
             incrementalLoadingParams.start += books.length;
-            if (books.length < incrementalLoadingParams.count) {
+            if (parseInt(data.querySelector('totalResults').innerHTML) === bookMap.size) {
                 incrementalLoadingParams.count = 0;
+                toggleFooter(true);
+            } else {
+                toggleFooter();
             }
+            loader.style.display = 'none';
             return books;
         });
     }
@@ -78,7 +94,7 @@
 
     function checkAndInjectEmptyMessage() {
         const kiwixBodyDiv = document.getElementsByClassName('kiwixHomeBody')[0];
-        if (!Object.keys(bookMap).length) {
+        if (!bookMap.size) {
             if (!noResultInjected) {
                 noResultInjected = true;
                 iso.remove(document.getElementsByClassName('book__list')[0].getElementsByTagName('a'));
@@ -105,17 +121,19 @@
     async function loadAndDisplayBooks(sort = false) {
         if (isFetching) return;
         isFetching = true;
-        let books = await loadBooks();
+        await loadAndDisplayBooksUnguarded(sort);
-        if (checkAndInjectEmptyMessage()) {
         isFetching = false;
-            return;
     }
+
+    async function loadAndDisplayBooksUnguarded(sort) {
+        let books = await loadBooks();
+        if (checkAndInjectEmptyMessage()) {return}
         const booksToFilter = new Set();
         const booksToDelete = new Set();
         iso.arrange({
             filter: function (idx, elem) {
                 const id = elem.getAttribute('data-id');
-                const retVal = bookMap.hasOwnProperty(id);
+                const retVal = bookMap.has(id);
                 if (retVal) {
                     booksToFilter.add(id);
                     if (sort) {
@@ -131,14 +149,13 @@
         books = [...books].filter((book) => {return !booksToFilter.has(getInnerHtml(book, 'id'))});
         booksToDelete.forEach(book => {iso.remove(book);});
         books.forEach((book) => {iso.insert(generateBookHtml(book, sort))});
-        isFetching = false;
     }
 
     async function resetAndFilter(filterType = '', filterValue = '') {
         isFetching = false;
         incrementalLoadingParams.start = 0;
         incrementalLoadingParams.count = viewPortToCount();
-        bookMap = {};
+        bookMap.clear();
         params = new URLSearchParams(window.location.search);
         if (filterType) {
             if (!filterValue) {

static/templates/index.html

@@ -127,6 +127,46 @@
         top: 48%;
         left: 42%;
       }
+      .shadow {
+        box-shadow: 0 6px 2px -3px grey;
+      }
+      .loader-spinner {
+        position: absolute;
+        top: 50%;
+        left: 50%;
+        border: 2px solid #f3f3f3;
+        border-radius: 50%;
+        border-top: 2px solid #3498db;
+        width: 30px;
+        height: 30px;
+        margin: auto;
+        -webkit-animation: spin 0.5s linear infinite; /* Safari */
+        animation: spin 2s linear infinite;
+        margin-top: 35px;
+        margin-bottom: -35px;
+      }
+      /* Safari */
+      @-webkit-keyframes spin {
+        0% { -webkit-transform: rotate(0deg); }
+        100% { -webkit-transform: rotate(360deg); }
+      }
+      @keyframes spin {
+        0% { transform: rotate(0deg); }
+        100% { transform: rotate(360deg); }
+      }
+      .loader {
+        display: none;
+        background: rgba(0, 0, 0, 0.5);
+        overflow: hidden;
+        margin: 0;
+        padding: 0;
+        position: absolute;
+        left: 0;
+        top: 0;
+        width: 100%;
+        height: 100%;
+        z-index: 100;
+      }
     </style>
     <script src="{{root}}/skin/isotope.pkgd.min.js" defer></script>
     <script src="{{root}}/skin/categoryList.js"></script>
@@ -150,6 +190,7 @@
     <div class="kiwixHomeBody">
       <div class="book__list"></div>
     </div>
+    <div class=loader><div class="loader-spinner"></div></div>
     <div id="kiwixfooter">Powered by <a href="https://kiwix.org">Kiwix</a></div>
   </body>
 </html>