added filter functionality

src/server/internalServer.cpp

@@ -304,7 +304,7 @@ InternalServer::get_matching_if_none_match_etag(const RequestContext& r) const
 
 std::unique_ptr<Response> InternalServer::build_homepage(const RequestContext& request)
 {
-  return ContentResponse::build(*this, RESOURCE::templates::index_html, get_default_data(), "text/html; charset=utf-8");
+  return ContentResponse::build(*this, RESOURCE::templates::index_html, get_default_data(), "text/html; charset=utf-8", true);
 }
 
 std::unique_ptr<Response> InternalServer::handle_meta(const RequestContext& request)

src/server/internalServer.h

@@ -106,7 +106,7 @@ class InternalServer {
     std::string m_server_id;
 
     friend std::unique_ptr<Response> Response::build(const InternalServer& server);
-    friend std::unique_ptr<ContentResponse> ContentResponse::build(const InternalServer& server, const std::string& content, const std::string& mimetype);
+    friend std::unique_ptr<ContentResponse> ContentResponse::build(const InternalServer& server, const std::string& content, const std::string& mimetype, bool isHomePage);
     friend std::unique_ptr<Response> ItemResponse::build(const InternalServer& server, const RequestContext& request, const zim::Item& item);
     friend std::unique_ptr<Response> Response::build_500(const InternalServer& server, const std::string& msg);
 

src/server/response.cpp

@@ -349,21 +349,21 @@ ContentResponse::ContentResponse(const std::string& root, bool verbose, bool wit
   add_header(MHD_HTTP_HEADER_CONTENT_TYPE, m_mimeType);
 }
 
-std::unique_ptr<ContentResponse> ContentResponse::build(const InternalServer& server, const std::string& content, const std::string& mimetype)
+std::unique_ptr<ContentResponse> ContentResponse::build(const InternalServer& server, const std::string& content, const std::string& mimetype, bool isHomePage)
 {
    return std::unique_ptr<ContentResponse>(new ContentResponse(
         server.m_root,
         server.m_verbose.load(),
-        server.m_withTaskbar,
+        server.m_withTaskbar && !isHomePage,
         server.m_withLibraryButton,
         server.m_blockExternalLinks,
         content,
         mimetype));
 }
 
-std::unique_ptr<ContentResponse> ContentResponse::build(const InternalServer& server, const std::string& template_str, kainjow::mustache::data data, const std::string& mimetype) {
+std::unique_ptr<ContentResponse> ContentResponse::build(const InternalServer& server, const std::string& template_str, kainjow::mustache::data data, const std::string& mimetype, bool isHomePage) {
   auto content = render_template(template_str, data);
-  return ContentResponse::build(server, content, mimetype);
+  return ContentResponse::build(server, content, mimetype, isHomePage);
 }
 
 ItemResponse::ItemResponse(bool verbose, const zim::Item& item, const std::string& mimetype, const ByteRange& byterange) :

src/server/response.h

@@ -79,8 +79,8 @@ class Response {
 class ContentResponse : public Response {
   public:
     ContentResponse(const std::string& root, bool verbose, bool withTaskbar, bool withLibraryButton, bool blockExternalLinks, const std::string& content, const std::string& mimetype);
-    static std::unique_ptr<ContentResponse> build(const InternalServer& server, const std::string& content, const std::string& mimetype);
-    static std::unique_ptr<ContentResponse> build(const InternalServer& server, const std::string& template_str, kainjow::mustache::data data, const std::string& mimetype);
+    static std::unique_ptr<ContentResponse> build(const InternalServer& server, const std::string& content, const std::string& mimetype, bool isHomePage = false);
+    static std::unique_ptr<ContentResponse> build(const InternalServer& server, const std::string& template_str, kainjow::mustache::data data, const std::string& mimetype, bool isHomePage = false);
 
     void set_taskbar(const std::string& bookName, const std::string& bookTitle);
 

static/resources_list.txt

@@ -19,6 +19,9 @@ skin/jquery-ui/jquery-ui.theme.min.css
 skin/jquery-ui/jquery-ui.min.css
 skin/caret.png
 skin/taskbar.js
+skin/langList.json
+skin/categoryList.json
+skin/isotope.pkgd.min.js
 skin/index.js
 skin/taskbar.css
 skin/block_external.js

static/skin/categoryList.json

@@ -0,0 +1,18 @@
+{
+  "other": "Other",
+  "gutenberg": "Gutenberg",
+  "mooc": "Mooc",
+  "phet": "Phet",
+  "psiram": "Psiram",
+  "stack_exchange": "Stack Exchange",
+  "ted": "Ted",
+  "vikidia": "Vikidia",
+  "wikibooks": "Wikibooks",
+  "wikinews": "Wikinews",
+  "wikipedia": "Wikipedia",
+  "wikiquote": "Wikiquote",
+  "wikisource": "Wikisource",
+  "wikiversity": "Wikiversity",
+  "wikivoyage": "Wikivoyage",
+  "wiktionary": "Wiktionary"
+}

static/skin/index.js

@@ -1,16 +1,19 @@
 (function() {
     const root = $(`link[type='root']`).attr('href');
+    let isFetching = false;
+    let iso;
+    let bookMap = {};
     const incrementalLoadingParams = {
         start: 0,
         count: viewPortToCount()
     };
-    let isFetching = false;
-    let timer;
+    let params = new URLSearchParams(window.location.search);
+    const filterTypes = ['lang', 'category', 'q'];
 
     function queryUrlBuilder() {
         let url = `${root}/catalog/search?`;
         url += Object.keys(incrementalLoadingParams).map(key => `${key}=${incrementalLoadingParams[key]}`).join("&");
-        return url;
+        return (url + (params.toString() ? `&${params.toString()}` : ''));
     }
 
     function viewPortToCount(){
@@ -21,41 +24,109 @@
         return node.querySelector(query).innerHTML;
     }
 
-    function generateBookHtml(book) {
+    function generateBookHtml(book, sort = false) {
         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');
+        linkTag.setAttribute('class', 'book');
+        linkTag.setAttribute('data-id', id);
+        linkTag.setAttribute('href', link);
+        if (sort) {
+            linkTag.setAttribute('data-idx', bookMap[id]);
+        }
 
-        return `<a href='${link}' data-id='${id}'><div class='book'>
-            <div class='book__background' style="background-image: url('${iconUrl}');">
+        linkTag.innerHTML = `<div class='book__background' style="background-image: url('${iconUrl}');">
             <div class='book__title' title='${title}'>${title}</div>
             <div class='book__description' title='${description}'>${description}</div>
             <div class='book__info'>${articleCount} articles, ${mediaCount} medias</div>
-            </div>
-        </div></a>`;
+        </div>`;
+        return linkTag;
     }
 
-    async function loadAndDisplayBooks() {
-        if (isFetching) return;
-        isFetching = true;
-        fetch(queryUrlBuilder()).then(async (resp) => {
+    async function loadBooks() {
+        return await fetch(queryUrlBuilder()).then(async (resp) => {
             const data = new window.DOMParser().parseFromString(await resp.text(), 'application/xml');
             const books = data.querySelectorAll('entry');
-            let bookHtml = '';
-            books.forEach((book) => {bookHtml += generateBookHtml(book)});
-            document.querySelector('.book__list').innerHTML += bookHtml;
+            books.forEach((book, idx) => {
+                bookMap[getInnerHtml(book, 'id')] = idx;
+            });
             incrementalLoadingParams.start += books.length;
             if (books.length < incrementalLoadingParams.count) {
                 incrementalLoadingParams.count = 0;
     }
-            isFetching = false;
+            return books;
         });
     }
 
+    async function loadAndDisplayOptions(nodeQuery, query) {
+        // currently taking an array in place of query, will replace it with query while fetching data from backend later on.
+        await fetch(query)
+        .then(async (resp) => {
+            const data = await resp.json();
+            Object.keys(data).forEach((option) => {
+                document.querySelector(nodeQuery).innerHTML += `<option value='${option}'>${data[option]}</option>`;
+            });
+        });
+    }
+
+    async function loadAndDisplayBooks(sort = false) {
+        if (isFetching) return;
+        isFetching = true;
+        let books = await loadBooks();
+        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);
+                if (retVal) {
+                    booksToFilter.add(id);
+                    if (sort) {
+                        elem.setAttribute('data-idx', bookMap[id]);
+                        iso.updateSortData(elem);
+                    }
+                } else {
+                    booksToDelete.add(elem);
+                }
+                return retVal;
+            }
+        });
+        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 filterBooks(filterType, filterValue) {
+        isFetching = false;
+        incrementalLoadingParams.start = 0;
+        incrementalLoadingParams.count = viewPortToCount();
+        bookMap = {};
+        params = new URLSearchParams(window.location.search);
+        if (!filterValue) {
+            params.delete(filterType);
+        } else {
+            params.set(filterType, filterValue);
+        }
+        window.history.pushState({}, null, `${window.location.href.split('?')[0]}?${params.toString()}`);
+        await loadAndDisplayBooks(true);
+    }
+
+    window.addEventListener('popstate', async () => {
+        bookMap = {};
+        isFetching = false;
+        incrementalLoadingParams.start = 0;
+        incrementalLoadingParams.count = viewPortToCount();
+        params = new URLSearchParams(window.location.search);
+        filterTypes.forEach(key => {document.getElementsByName(key)[0].value = params.get(key) || ''});
+        loadAndDisplayBooks(true);
+    });
+
     async function loadSubset() {
         if (incrementalLoadingParams.count && window.innerHeight + window.scrollY >= document.body.offsetHeight) {
             loadAndDisplayBooks();
@@ -73,6 +144,26 @@
     window.addEventListener('scroll', loadSubset);
 
     window.onload = async () => {
+            iso = new Isotope( '.book__list', {
+                itemSelector: '.book',
+                getSortData:{
+                    weight: function( itemElem ) {
+                        const index = itemElem.getAttribute('data-idx');
+                        return index ? parseInt(index) : Infinity;
+                    }
+                },
+                sortBy: 'weight'
+        });
         loadAndDisplayBooks();
+        loadAndDisplayOptions('#languageFilter', `${root}/skin/langList.json`);
+        loadAndDisplayOptions('#categoryFilter', `${root}/skin/categoryList.json`);
+        for (const key of params.keys()) {
+            document.getElementsByName(key)[0].value = params.get(key);
+        }
+        filterTypes.forEach((filter) => {
+            const filterTag = document.getElementsByName(filter)[0];
+            filterTag.addEventListener('change', () => {filterBooks(filterTag.name, filterTag.value)});
+        });
+        document.getElementById('kiwixSearchForm').onsubmit = (event) => {event.preventDefault()}
     }
 })();

static/skin/langList.json

@@ -0,0 +1,124 @@
+{
+  "aar": "Afar",
+  "afr": "Afrikaans",
+  "aka": "Akan",
+  "amh": "Amharic",
+  "ara": "Arabic",
+  "asm": "Assamese",
+  "aze": "Azerbaijani",
+  "bak": "Bashkir",
+  "bel": "Belarusian",
+  "bul": "Bulgarian",
+  "bam": "Bambara",
+  "ben": "Bengali",
+  "bod": "Tibetan",
+  "bre": "Breton",
+  "bos": "Bosnian",
+  "cat": "Catalan",
+  "che": "Chechen",
+  "cos": "Corsican",
+  "ces": "Czech",
+  "chv": "Chuvash",
+  "cym": "Welsh",
+  "dan": "Danish",
+  "deu": "German",
+  "dzo": "Dzongkha",
+  "ewe": "Ewe",
+  "eng": "English",
+  "spa": "Spanish",
+  "est": "Estonian",
+  "eus": "Basque",
+  "fas": "Persian",
+  "ful": "Fulah",
+  "fin": "Finnish",
+  "fao": "Faroese",
+  "fra": "French",
+  "gle": "Irish",
+  "glg": "Galician",
+  "grn": "Guarani",
+  "guj": "Gujarati",
+  "glv": "Manx",
+  "hau": "Hausa",
+  "heb": "Hebrew",
+  "hin": "Hindi",
+  "hrv": "Croatian",
+  "hun": "Hungarian",
+  "hye": "Armenian",
+  "ind": "Indonesian",
+  "ibo": "Igbo",
+  "isl": "Icelandic",
+  "ita": "Italian",
+  "iku": "Inuktitut",
+  "jpn": "Japanese",
+  "jav": "Javanese",
+  "kat": "Georgian",
+  "kik": "Kikuyu",
+  "kaz": "Kazakh",
+  "khm": "Khmer",
+  "kan": "Kannada",
+  "kor": "Korean",
+  "kas": "Kashmiri",
+  "kur": "Kurdish",
+  "cor": "Cornish",
+  "kir": "Kirghiz",
+  "ltz": "Luxembourgish",
+  "lug": "Ganda",
+  "lin": "Lingala",
+  "lao": "Lao",
+  "lit": "Lithuanian",
+  "lav": "Latvian",
+  "mlg": "Malagasy",
+  "mri": "Maori",
+  "mkd": "Macedonian",
+  "mal": "Malayalam",
+  "mon": "Mongolian",
+  "mar": "Marathi",
+  "mlt": "Maltese",
+  "mya": "Burmese",
+  "nld": "Dutch",
+  "nya": "Nyanja",
+  "orm": "Oromo",
+  "pol": "Polish",
+  "por": "Portuguese",
+  "que": "Quechua",
+  "roh": "Romansh",
+  "run": "Rundi",
+  "ron": "Romanian",
+  "rus": "Russian",
+  "kin": "Kinyarwanda",
+  "san": "Sanskrit",
+  "snd": "Sindhi",
+  "sag": "Sango",
+  "sin": "Sinhala",
+  "slk": "Slovak",
+  "slv": "Slovenian",
+  "sna": "Shona",
+  "som": "Somali",
+  "sqi": "Albanian",
+  "srp": "Serbian",
+  "ssw": "Swati",
+  "swe": "Swedish",
+  "tam": "Tamil",
+  "tel": "Telugu",
+  "tgk": "Tajik",
+  "tha": "Thai",
+  "tir": "Tigrinya",
+  "tuk": "Turkmen",
+  "fil": "Filipino",
+  "tsn": "Tswana",
+  "tur": "Turkish",
+  "tso": "Tsonga",
+  "tat": "Tatar",
+  "uig": "Uighur",
+  "ukr": "Ukrainian",
+  "urd": "Urdu",
+  "uzb": "Uzbek",
+  "ven": "Venda",
+  "vie": "Vietnamese",
+  "wln": "Walloon",
+  "wol": "Wolof",
+  "xho": "Xhosa",
+  "yor": "Yoruba",
+  "zho": "Chinese",
+  "zul": "Zulu"
+}

static/templates/index.html

@@ -49,7 +49,27 @@
         font-family: sans-serif;
         font-size: 13px;
         background-color: #f1f1f1;
-        box-shadow: 2px 2px 5px 0px #ccc;
+        box-shadow: 2px 2px 5px 0 #ccc;
+      }
+      #kiwixfooter {
+        text-align: center;
+        margin-top: 1em;
+      }
+      .kiwixHomeNavbar {
+        display: flex;
+        justify-content: center;
+      }
+      .kiwixFilter {
+        margin: 8px 10px;
+      }
+      .kiwixSearchForm {
+        margin: 8px 10px;
+        float: right;
+      }
+      @media (max-width: 1100px) {
+        .kiwixHomeBody {
+          padding: 0 125px;
+        }
       }
       .book:hover {
         background-color: #f9f9f9;
@@ -70,7 +90,7 @@
         line-height: 1em;
       }
       .book__description {
-        padding: 5px 55px 5px 0px;
+        padding: 5px 55px 5px 0;
         overflow: hidden;
         text-overflow: ellipsis;
         white-space: nowrap;
@@ -83,14 +103,32 @@
         font-size: 13px;
         line-height: 1em;
       }
+      a:link {
+        text-decoration: none;
+      }
+      a:visited {
+        text-decoration: none;
+      }
     </style>
-    <script type="text/javascript" src="{{root}}/skin/index.js" async></script>
+    <script src="{{root}}/skin/isotope.pkgd.min.js" defer></script>
+    <script type="text/javascript" src="{{root}}/skin/index.js" defer></script>
   </head>
   <body class="kiwix">
-    <div class="kiwix">
+    <div class='kiwixHomeNavbar'>
+      <select name="lang" id="languageFilter" class='kiwixFilter'>
+        <option value="" selected>All languages</option>
+      </select>
+      <select name="category" id="categoryFilter" class='kiwixFilter'>
+        <option value="" selected>ALl categories</option>
+      </select>
+      <form id='kiwixSearchForm' class='kiwixSearchForm'>
+        <input type="text" name="q" id="searchFilter" class='kiwixSearch'>
+        <input type="submit" value="Submit"/>
+      </form>
+    </div>
+    <div class="kiwixHomeBody">
       <div class="book__list"></div>
     </div>
-
     <div id="kiwixfooter">Powered by <a href="https://kiwix.org">Kiwix</a></div>
   </body>
 </html>