Restructure, improive keyboard input handling, debouncing

3CX_TAPI.user.js

@@ -1,6 +1,9 @@
 // ==UserScript==
 // @name         3CX TAPI
-// @version  1
+// @author       Daniel Triendl
+// @namespace    http://cp-solutions.at
+// @copyright    Copyright 2020 CP Solutions GmbH
+// @version      2
 // @grant        GM.xmlHttpRequest
 // @include      https://192.168.0.154:5001/webclient*
 // @include      https://cpsolution.my3cx.at:5001/webclient*
@@ -10,7 +13,22 @@
 
 console.log('TAPI init');
 
-function fireChangeEvents(element) {
+const debounce = (func, wait) => {
+  let timeout;
+
+  return function executedFunction(...args) {
+    const later = () => {
+      clearTimeout(timeout);
+      func(...args);
+    };
+
+    clearTimeout(timeout);
+    timeout = setTimeout(later, wait);
+  };
+};
+
+const tapi = {
+  fireChangeEvents: (element) => {
     var changeEvent = null;
     changeEvent = document.createEvent("HTMLEvents");
     changeEvent.initEvent("input", true, true);
@@ -24,20 +42,48 @@ function fireChangeEvents(element) {
     changeEvent.initEvent("change", true, true);
     element.dispatchEvent(changeEvent);
     console.debug('change event dispatched for element: ' + element.id);
-}
+  },
 
-function removeSearchResults() {
+  removeSearchResults: () => {
     var resultList = document.getElementById('tapiResults');
     if (resultList) {
       resultList.parentNode.removeChild(resultList);
     }
+    tapi.currentSearchText = '';
+  },
+
+  dial: (item) => {
+    console.log(item);
+    var contact = item.contact;
+    var searchInput = document.getElementsByName('searchByNumberInput');
+    if (searchInput.length > 0) {
+      searchInput[0].value = contact.tD_NUMBER_TAPI;
+      searchInput[0].focus();
+
+      tapi.fireChangeEvents(searchInput[0]);
+    }
+  },
+
+  selectResult: (resultLi) => {
+    var items = document.getElementsByClassName('tapi-search-result');
+    for (var item of items) {
+      item.classList.remove('bg-light');
+      item.classList.remove('tapi-search-result-selected');
     }
 
-var doSearch = function () {
+    resultLi.classList.add('bg-light');
+    resultLi.classList.add('tapi-search-result-selected');
+  },
+
+  currentSearchText: '',
+
+  doSearch: debounce(() => {
     var search = document.getElementById('tapiSearchInput');
     var searchText = search.value.trim();
     if (searchText == '') {
-    removeSearchResults();
+      tapi.removeSearchResults();
+      return;
+    } else if (searchText == tapi.currentSearchText) {
       return;
     }
     console.log('Searching TAPI');
@@ -48,9 +94,10 @@ var doSearch = function () {
         console.log('TAPI Search response', response);
         var contacts = JSON.parse(response.responseText);
         console.log('TAPI Contacts', contacts);
-      removeSearchResults();
+        tapi.removeSearchResults();
+        tapi.currentSearchText = searchText;
 
-      resultList = document.createElement('ul');
+        var resultList = document.createElement('ul');
         resultList.id = 'tapiResults';
         resultList.classList.add('search-nav-absolute');
         resultList.classList.add('search-nav-ul');
@@ -59,25 +106,16 @@ var doSearch = function () {
         resultList.innerHTML = '';
         for (var i = 0; i < contacts.length; i++) {
           var li = document.createElement('li');
+          li.classList.add('tapi-search-result');
           li.classList.add('search-result');
           li.classList.add('pointer');
           li.onmouseover = function () {
-          this.classList.add('bg-light');
-        };
-        li.onmouseout = function () {
-          this.classList.remove('bg-light');
+            tapi.selectResult(this);
           };
           li.contact = contacts[i];
           li.onclick = function () {
-          var contact = this.contact;
-          var searchInput = document.getElementsByName('searchByNumberInput');
-          if (searchInput.length > 0) {
-            searchInput[0].value = contact.tD_NUMBER_TAPI;
-            searchInput[0].focus();
-
-            fireChangeEvents(searchInput[0]);
+            tapi.dial(this);
           }
-        };
           li.style.listStyle = 'outside none none'; // display: flex; align-items: center;
 
           var resultText = document.createElement('div');
@@ -96,15 +134,60 @@ var doSearch = function () {
         }
       }
     });
-};
+  }, 200),
 
-waitForKeyElements('div.nav-search', (element) => {
+  doSearchKeyDown: (ev) => {
+    var items;
+    if (ev.key == 'ArrowUp') {
+      items = document.getElementsByClassName('tapi-search-result-selected');
+      if (items.length > 0) {
+        var prev = items[0].previousSibling;
+      }
+      if (!prev) {
+        items = document.getElementsByClassName('tapi-search-result');
+        if (items.length > 0) {
+          prev = items[items.length - 1];
+        }
+      }
+      if (prev) {
+        tapi.selectResult(prev);
+        prev.scrollIntoView(true);
+      }
+    } else if (ev.key == 'ArrowDown') {
+      items = document.getElementsByClassName('tapi-search-result-selected');
+      if (items.length > 0) {
+        var next = items[0].nextSibling;
+      }
+      if (!next) {
+        items = document.getElementsByClassName('tapi-search-result');
+        if (items.length > 0) {
+          next = items[0];
+        }
+      }
+      if (next) {
+        tapi.selectResult(next);
+        next.scrollIntoView(false);
+      }
+    } else {
+      tapi.doSearch();
+    }
+  },
+
+  createSearchBox: (element) => {
     console.log('Create TAPI Search');
 
     var form = document.createElement('form');
     form.style.width = '200px';
     form.style.float = 'right';
     form.style.marginRight = '20px';
+    form.onsubmit = function () {
+      var items = document.getElementsByClassName('tapi-search-result-selected');
+      if (items.length > 0) {
+        tapi.dial(items[0]);
+      }
+
+      return false;
+    };
 
     var searchBox = document.createElement('div');
     searchBox.classList.add('contact-search-box');
@@ -118,19 +201,20 @@ waitForKeyElements('div.nav-search', (element) => {
 
     var search = document.createElement('input');
     search.id = 'tapiSearchInput';
+    search.autocomplete = 'off';
     search.classList.add('padder');
     search.classList.add('rounded');
     search.classList.add('bg-light');
     search.classList.add('no-border');
     search.classList.add('contact-search-box');
     search.placeholder = 'TAPI Suche';
-  search.onfocus = doSearch;
-  search.onkeyup = doSearch;
+    search.onfocus = tapi.doSearch;
+    search.onkeydown = tapi.doSearchKeyDown;
     search.onblur = function () {
       console.log('TAPI Search exit');
       setTimeout(function () {
         console.log('TAPI clear search results');
-      removeSearchResults();
+        tapi.removeSearchResults();
       }, 500);
     };
     searchWrapper.appendChild(search);
@@ -143,4 +227,7 @@ waitForKeyElements('div.nav-search', (element) => {
     searchWrapper.appendChild(icon);
 
     element.appendChild(form);
-}, false);
+  }
+};
+
+waitForKeyElements('div.nav-search', tapi.createSearchBox, false);