mlslp/index.html at master · ventuno/mlslp · GitHub

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<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <style>
      #content {
        width: 100%;
        display: block;
      }
      #messages {
        width: auto;
        height: 200px;
        display: block;
        overflow: auto;
        background-color: grey;
      }
      #messages > li.self {
        width: 100%;
        text-align: right;
        background-color: green;
      }
      #messages > li.other {
        background-color: yellow;
      }
    </style>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
    <script>
      var host = location.origin.replace(/^http/, 'ws')
      var ws = new WebSocket(host);
      var msgStore = MSGStore();
      var msgRenderer = MSGRenderer();
      ws.onmessage = function (event) {
        var messages = JSON.parse(event.data);
        if (Array.isArray(messages)) {
          for (var i = 0; i < messages.length; i++) {
            messages[i].className = 'other';
            msgStore.addMessage(messages[i]);
          }
          msgRenderer.rerender();
        }
        ws.send('kalive');
      };

      function getDOMMessage(message) {
        var li = document.createElement('li');
        jQuery(li).addClass(message.className);
        li.innerHTML = message.text;
        return li;
      }

      function MSGRenderer (msgStore) {
        this._msgStore = msgStore;
        var _this = this;
        return {
          rerender: function () {
            jQuery('#messages').empty();
            var messages = _this.msgStore.getMessages();
            for (var i = 0; i < messages.length; i++) {
              jQuery('#messages').append(getDOMMessage(messages[i]));
            }
          }
        }
      }

      function MSGStore () {
        this._messages = [];
        this._messagesAsDict = {};
        var _this = this;
        return {
          addMessage: function (message) {
            if (!_this._messagesAsDict.hasOwnProperty(message.id)) {
              _this._messagesAsDict[message.id] = message;
              _this._messages.push(message);
            }
          },
          getMessages: function () {
            return _this._messages.sort(function (a, b) {
              return a.date - b.date;
            });
          }
        };
      }

      function sendMessage() {
        var textAreaContent = jQuery('#content');
        var filesContent = jQuery('#files');
        var formData = new FormData();
        var content = textAreaContent.val();
        if (content) {
          formData.append('content', content);
          var pictures = filesContent[0].files;
          for (var i = 0; i < pictures.length; i++) {
            formData.append('pictures', pictures[i]);
          }
          var newMessage = {
            text: content,
            className: 'self',
            id: Date.now(),
            date: Date.now()
          };
          jQuery.ajax({
            url:'/api/message',
            type: 'POST',
            contentType: false,
            processData: false,
            data: formData,
            success: function () {
              msgStore.addMessage(newMessage);
              msgRenderer.rerender();
              textAreaContent.val('');
            },
            error: function (err) {
              alert(err.responseText);
            }
          });
        }
      }
    </script>
  </head>

  <body>
    <ul id="messages"></ul>
    <div>
      <textarea id="content"></textarea>
      <input id="files" type="file" multiple accept="image/*">
      <button onclick="sendMessage();">Send</button>
    </div>
  </body>
</html>