keyboardGenerator.gs

// Copyright 2017 Viber Media S.à r.l. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

var KEYBOARD_DEFAULT_FONT_COLOR = '#FFFFFF';

var KeyboardGenerator = function() {
  this.elements = [];

  this.randomColor = function () {

    var hexValues = ['0','1','2','3','4','5','6','7','8','9','a','b','c','d','e'];
    var randomColor = '#';

    for ( var i = 0; i < 6; i++ ) {
      var x = Math.round( Math.random() * 14 );
      var y = hexValues[x];
      randomColor += y;
    }

    return randomColor;
  }

  this.elementToKeyboard = function(text, backgroundColor, fontColor) {
	return [{
                'Columns': '6',
                'Rows': '1',
                'BgColor': backgroundColor,
                'ActionType': 'reply',
        		'ActionBody': text,
                'Text': Utilities.formatString('<font color=%s><b>%s</b></font>', fontColor, text),
                'TextVAlign': 'middle',
                'TextHAlign': 'center',
                'TextSize': 'large'
            }];
  }

  this.addElement = function(text, backgroundColor, fontColor) {
    var addedElements = this.elementToKeyboard(text, backgroundColor || this.randomColor(),
        fontColor || KEYBOARD_DEFAULT_FONT_COLOR);

    this.elements = this.elements.concat(addedElements);
  }

  this.build = function() {
    return {
		'Type': 'keyboard',
		'DefaultHeight': false,
        'Buttons': this.elements
    };
  }
};