data-sevc-controllet.html 39.2 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951
<!--
@license
    The MIT License (MIT)

    Copyright (c) 2015 Dipartimento di Informatica - Università di Salerno - Italy

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
-->

<!--
* Developed by :
* ROUTE-TO-PA Project - grant No 645860. - www.routetopa.eu
*
-->

<link rel="import" href="../../bower_components/polymer/polymer.html">
<link rel="import" href="../../bower_components/paper-styles/color.html">

<link rel="import" href="../../bower_components/neon-animation/neon-animated-pages.html">
<link rel="import" href="../../bower_components/neon-animation/neon-animatable.html">
<link rel="import" href="../../bower_components/neon-animation/neon-animations.html">

<link rel="import" href="../../bower_components/iron-ajax/iron-ajax.html">
<link rel="import" href="../../bower_components/paper-input/paper-input.html">
<link rel="import" href="../../bower_components/paper-input/paper-textarea.html">
<link rel="import" href="../../bower_components/paper-button/paper-button.html">
<link rel="import" href="../../bower_components/paper-tabs/paper-tabs.html">
<link rel="import" href="../../bower_components/paper-tabs/paper-tab.html">
<link rel="import" href="../../bower_components/iron-pages/iron-pages.html">
<link rel="import" href="../../bower_components/paper-dropdown-menu/paper-dropdown-menu.html">
<link rel="import" href="../../bower_components/paper-menu/paper-menu.html">
<link rel="import" href="../../bower_components/paper-item/paper-item.html">
<link rel="import" href="../../bower_components/paper-toast/paper-toast.html">
<link rel="import" href="../../bower_components/paper-dialog/paper-dialog.html">
<link rel="import" href="../../bower_components/paper-dialog-scrollable/paper-dialog-scrollable.html">

<link rel="import" href="../items-slider-controllet/items-slider-controllet.html">
<link rel="import" href="../draggable-element-controllet/draggable-element-controllet.html">
<link rel="import" href="../treeview-controllet/treeview-controllet.html">
<link rel="import" href="../text-element-controllet/text-element-controllet.html">

<!--
The `data-sevc-controllet` is a controllet to generate visualization from a dataset accessible through api. A json response is required.
It's composed by three steps. First, user have to select a datasource to access to a dataset. He can copy and paste/drag and drop an url(an api url with json response) or select
from select contextual menu an available one. Second, the user selects the fields he want to visualize from a treeview by checking on it. A table preview of selected fields will show
the currently selected values. Third, the users selects a visualization(datalet) from a slider and drags the previous selected fields in to the input data model fields area. A preview
is available every time a fields is dragged in the input data model fields area.

Example:

    <data-sevc-controllet deep-url="http://192.168.214.128/DatalEts-Ecosystem-Provider/DEEP/"
                          datalets-list-url="http://192.168.214.128/DatalEts-Ecosystem-Provider/DEEP/datalets-list"
                          datasets='{[{name : 'dataset1', url : dataset1Urls}, ... , {name : 'datasetN', url : datasetNUrls}]'>
    </data-sevc-controllet>


@element data-sevc-controllet
@status beta
@homepage
@group controllets
-->


<dom-module id="data-sevc-controllet">
        <template>
            <link rel="stylesheet" href="../shared_js/perfect-scrollbar/css/perfect-scrollbar.min.css">
            <link rel="stylesheet" href="static/css/reset.css">

            <style is="custom-style">

                ::content body {
                    font-family: 'Roboto', sans-serif;
                }

                .flexchild
                {
                @apply(--layout-flex);
                }

                .flex2child
                {
                @apply(--layout-flex-2);
                }

                .avatar
                {
                    display: inline-block;
                    height: 2em;
                    width: 2em;
                    border-radius: 50%;
                    background: var(--paper-blue-500);
                    color: white;
                    line-height: 2em;
                    font-size: 1.87em;
                    text-align: center;
                }

                .title
                {
                    position: relative;
                    top: 0.60vh;
                    margin-left: 20px;
                }

                .big
                {
                    font-size: 1.37em;
                    color: var(--google-grey-500);
                }

                .medium
                {
                    font-size: 1em;
                    padding-bottom: 0.5em;
                    color : #000000;
                    font-weight: bold;
                }

                .small
                {
                    font-size: 0.8em;
                    padding-top: 10px;
                    color: var(--paper-blue-500);
                    font-weight: bold;
                }

                paper-input
                {
                    width: 80%;
                }

                paper-dropdown-menu
                {
                    text-align: left;
                    margin: auto;
                    width: 100%;
                }

                ::content paper-menu-button
                {
                    display: block;
                    width: 100%;
                }

                #visualization_slider_area
                {
                    min-width: 670px;
                    min-height: 180px;
                }

                #fields_mapping_area
                {
                    min-width: 670px;
                    min-height: 180px;
                }

                #datalet_placeholder
                {
                    height: 360px;
                    min-height: 360px;

                }

                .datalet_right_container
                {
                    width: 100vh;
                }

                .field-mapping-card
                {
                    width: 50%;
                    float: left;
                }

                .toolbar_button
                {
                    --iron-icon-height: 32px;
                    --iron-icon-width: 32px;
                }

                #finish_button
                {
                    --iron-icon-height: 32px;
                    --iron-icon-width: 32px;
                    color: var(--paper-blue-500);
                }

                .area_container
                {
                    overflow: hidden;
                    margin : 0.8em;
                    padding : 0.8em;
                    border-width: 1em;
                    border-radius: 0.125rem;
                    box-shadow: 0.125em 0.125em 0.1125em 0.125em rgba(0, 0, 0, 0.25);
                }

                #fields_placeholder{
                    width: 40%;
                    height: 75vh;
                    position: relative;
                    float: left;
                    overflow: auto;
                }

                #table_fields_container{
                    height: 75vh;
                    width: 55%;
                    position: relative;
                    float: left;
                    overflow: auto;
                }

                paper-tabs, paper-toolbar
                {
                    background-color:  var(--paper-blue-500);
                    color: #ffffff;
                    box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.2);
                }

                paper-toolbar paper-tabs
                {
                    box-shadow: none;
                    --paper-tabs-selection-bar-color : var(--google-gray-500);
                }

                paper-tabs[noink][no-bar] paper-tab.iron-selected
                {
                    background-color: var(--google-gray-500);
                }

                paper-tabs[align-bottom]
                {
                    box-shadow: 0px -2px 6px rgba(0, 0, 0, 0.15);
                }

                #idm_fields_main_container{
                    position: relative;
                    height: 50vh;
                }

                #selected_fields_main_container{
                    position: relative;
                    height: 50vh;
                }

                #idm_layout_main_container{
                    position: relative;
                    height: 25vh;
                }

                paper-menu{
                    width: 100%;
                }

                paper-dialog {
                    position: fixed;
                    top: 16px;
                    width: auto;
                    height: auto;
                    overflow: auto;
                    padding : 30px;
                }

            </style>

            <iron-ajax
                    auto
                    id="data_request"
                    url={{dataUrl}}
                    verbose="true"
                    on-response="handleResponseData"
                    debounce-duration="300">
            </iron-ajax>

            <iron-ajax
                    id="datales_list_request"
                    auto
                    url={{dataletsListUrl}}
                    handle-as="json"
                    on-response="handleResponseDatalets"
                    debounce-duration="300">
            </iron-ajax>

            <iron-ajax
                    id="selected_datalet_request"
                    url={{deepUrl}}
                    verbose="true"
                    on-response="handleSelectedDatalet"
                    debounce-duration="300">
            </iron-ajax>

            <content>

                <neon-animated-pages id="pages" selected="[[selected]]" entry-animation="[[entryAnimation]]" exit-animation="[[exitAnimation]]">

                    <neon-animatable>

                        <div class="vertical justified layout">

                            <div class="horizontal layout">
                                <div class="avatar" style="margin-left:15px">1</div>
                                <div class="title flex">
                                    <div id="toolbar_title" class="big">Dataset source</div>
                                    <div id="toolbar_description" class="small">Copy and paste/drag and drop in the textarea the url of datasource</div>
                                </div>
                                <paper-icon-button id="NextButton" class="toolbar_button" on-click="_onNextClick" icon="chevron-right" alt="arrow-forward" title="arrow-forward"></paper-icon-button>
                            </div>

                            <div class="area_container">
                                <paper-tabs selected="{{DatasourceTabSelected}}">
                                    <paper-tab>Select data source</paper-tab>
                                    <paper-tab>Most popular</paper-tab>
                                    <paper-tab>Search</paper-tab>
                                </paper-tabs>
                                <iron-pages selected="{{DatasourceTabSelected}}">
                                    <div>
                                        <div class="card-content">
                                            <paper-dropdown-menu id="datasets-sources" label="Available datasets">
                                                <paper-menu class="dropdown-content">
                                                    <template is="dom-repeat" items="{{datasets}}" as="dataset" index-as="index">
                                                        <paper-item id="{{index}}" on-tap="_datasourceSelected">{{dataset.name}}</paper-item>
                                                    </template>
                                                </paper-menu>
                                            </paper-dropdown-menu>
                                            <paper-icon-button id="infoButton" on-click="_onInfoClick" icon="info-outline" alt="Information about selected dataset" title="info-button" style="color:#9e9e9e;"></paper-icon-button>
                                        </div>

                                        <div><img src="static/images/or.png" style="position: relative;left: 50%;padding-top:20px"></div>

                                        <div class="card-content">
                                            <paper-textarea id="data_url" label="Dataset api data url" floatingLabel value="{{dataUrl}}" on-dragover="_handleDatasourceDragOver"></paper-textarea>
                                        </div>


                                    </div>
                                    <div><img src="static/images/UnderConstruction.png" style="position: relative;top: 60%;left: 25%;"></div>
                                    <div><img src="static/images/UnderConstruction.png" style="position: relative;top: 60%;left: 25%;"></div>
                                </iron-pages>
                            </div>

                        </div>

                    </neon-animatable>

                    <neon-animatable>

                        <div class="vertical justified layout">

                            <div class="horizontal layout">
                                <paper-icon-button id="PrevButton" class="toolbar_button x-scope" on-click="_onPrevClick" icon="chevron-left" alt="arrow-back" title="arrow-back"></paper-icon-button>
                                <div class="avatar">2</div>
                                <div class="title flex">
                                    <div id="toolbar_title" class="big">Dataset source</div>
                                    <div id="toolbar_description" class="small">Copy and paste/drag and drop in the textarea the url of datasource</div>
                                </div>
                                <paper-icon-button id="NextButton" class="toolbar_button" on-click="_onNextClick" icon="chevron-right" alt="arrow-forward" title="arrow-forward"></paper-icon-button>
                            </div>

                            <div class="horizontal layout">

                                <div id="fields_placeholder" class="area_container flexchild" style="min-width:300px">
                                    <treeview-controllet id="fields_treeview"></treeview-controllet>
                                </div>

                                <div id="table_fields_container" class="area_container flex2child">
                                    <div id="table_component_place_holder"></div>
                                </div>

                            </div>

                        </div>

                    </neon-animatable>

                    <neon-animatable style="height:100vh">

                        <div class="vertical justified layout">

                            <div class="horizontal layout">
                                <paper-icon-button id="PrevButton" class="toolbar_button x-scope" on-click="_onPrevClick" icon="chevron-left" alt="arrow-back" title="arrow-back"></paper-icon-button>
                                <div class="avatar">3</div>
                                <div class="title flex">
                                    <div id="toolbar_title" class="big">Data mapping</div>
                                    <div id="toolbar_description" class="small">Select the visualization from the slider, drag and drop the selected fields in visualization parameter area, customize the visualization if you need</div>
                                </div>
                                <paper-icon-button id="finish_button" on-click="_onFinish" icon="add-circle" alt="Conforms the creation" title="finish"></paper-icon-button>
                            </div>


                            <div class="horizontal layout">

                                <div class="">
                                    <div id="visualization_slider_area" class="area_container"></div>
                                    <div id="fields_mapping_area" class="area_container">

                                        <div id="selected_fields_main_container" class="field-mapping-card">
                                            <div class="title">
                                                <div class="medium">Selected fields</div>
                                            </div>
                                            <div id="selected_fields_container" class="area_container"></div>
                                        </div>

                                        <div id="idm_fields_main_container" class="field-mapping-card">
                                            <div class="title">
                                                <div class="medium">Datalet fields</div>
                                            </div>
                                            <div id="datalet_idm_fields_container" class="area_container"></div>
                                        </div>

                                        <div id="idm_layout_main_container" class="area_container">
                                            <div class="title">
                                                <div class="medium">Layout fields</div>
                                            </div>
                                            <div id="idm_layout_container" class="area_container"></div>
                                        </div>
                                    </div>
                                </div>

                                <div id="datalet_placeholder" style="min-width: 43%;"></div>


                            </div>

                        </div>

                    </neon-animatable>

                </neon-animated-pages>

                <paper-toast id="message" text=""></paper-toast>

                <paper-dialog id="infoDialog">
                    <h2 id="infoDialogTitle"></h2>
                    <paper-dialog-scrollable id="infoDialogContent">
                    </paper-dialog-scrollable>
                </paper-dialog>

            </content>
    </template>

    <script src="../shared_js/perfect-scrollbar/js/min/perfect-scrollbar.jquery.min.js"></script>
    <script src="../../../DEEPCLIENT/js/deepClient.js"></script>

    <script>

        Polymer({

            is : 'data-sevc-controllet',

            /**
             * Received when the user selects a datalet from slider.
             *
             * @event items-slider-controllet_item-selected
             */

            /**
             * Received when the user drags a selected fields in to one of the source input data model field
             *
             * @event draggable-element-controllet_content-dragged
             */

            /**
             * Received when the user selects one field from treeview controllet
             *
             * @event treeview-controllet-fileds-selected
             */

            /**
             * Received when the user drags a selected fields in to one of the source input data model field
             *
             * @event draggable-element-controllet_content-dragged
             */

            /**
             * Received when the user change text value of the selected datalet layout inputs
             *
             * @event text-element-controllet_content-changed
             */

            /**
             * Fired when the user press to finish button. At this event are attached all information about the visualization currently created
             *
             * @event data-sevc-controllet.dataletCreated
             */

            listeners : {
                'items-slider-controllet_item-selected' : '_dataletSelected',
                'draggable-element-controllet_content-dragged' : '_fieldsMapped',
                'treeview-controllet_fileds-selected' : '_fieldsSelected',
                'text-element-controllet_content-changed' : '_textElementChanged'
            },

            properties : {

                entryAnimation : {
                    type  : String,
                    value : ""
                },

                exitAnimation  : {
                    type  : String,
                    value : ""
                },

                selected       : {
                    type  : Number,
                    value : 0
                },

                /**
                 * It represents the data url from CKAN api
                 *
                 * @attribute dataUrl
                 * @type string
                 * @default 'null'
                 */
                dataUrl : {
                    type : String,
                    value : "",
                    observer : '_dataUrlChanged'
                },
                /**
                 * It represents the DEEP url to get information about the datalets
                 *
                 * @attribute deepUrl
                 * @type string
                 * @default 'null'
                 */
                deepUrl : {
                    type : String,
                    value : ""
                },
                /**
                 * It's used to store the list of datalets returned from DEEP
                 *
                 * @attribute datalets_list
                 * @type Array
                 * @default empty
                 */
                datalets_list : {
                    type : Array ,
                    value : []
                },
                /**
                 * It's used to store the selected datalet. It will be set when the controllet get the event of selection by item slider (items-slider-controllet_item-selected)
                 *
                 * @attribute selected_datalet
                 * @type String
                 * @default ''
                 */
                selected_datalet : {
                    type : String,
                    value : ""
                },
                /**
                 * It's used to store the list of selected fields by user
                 *
                 * @attribute selected_fields
                 * @type Array
                 * @default empty
                 */
                selected_fields : {
                    type : Array,
                    value : []
                },
                /**
                 * It's used to store the params to give to datalet. This kind of params will not processed by selection step
                 *
                 * @attribute params_fields
                 * @type Object
                 * @default empty
                 */
                params_fields:{
                  type: Object,
                  value: {}
                },
                /**
                 * It's used to store the tab index in the first pass
                 *
                 * @attribute DatasourceTabSelected
                 * @type Number
                 * @default 0
                 */
                DatasourceTabSelected : {
                    type : Number,
                    value : 0
                },
                /**
                 * It's used to store the datasets to show in the contexual menu
                 *
                 * @attribute datasets
                 * @type Array
                 * @default empty
                 */
                datasets :
                {
                    type : Array,
                    value : []
                }
            },
            /**
             * It is called after the element’s template has been stamped and all elements inside the element’s local DOM have been configured (with values bound from parents, deserialized attributes, or else default values) and had their ready method called.
             * In this phase the scrollbar will be initialized
             *
             * @method handleResponseData
             *
             * @param {Event} e
             */

            ready : function(){

                $(this.$.fields_placeholder).perfectScrollbar();
                $(this.$.selected_fields_main_container).perfectScrollbar();
                $(this.$.idm_fields_main_container).perfectScrollbar();
                $(this.$.idm_layout_main_container).perfectScrollbar();
                $(this.$.table_fields_container).perfectScrollbar();

            },

            /**
             * Callback to parse the data requested when dataUrl change its value
             *
             * @method handleResponseData
             *
             * @param {Event} e
             */
            handleResponseData : function(e){

                this.$.fields_treeview.init(e.detail.response);

            },

            /**
             * Callback to parse the components response object
             *
             * @method handleResponseDatalets
             *
             * @param {Event} e
             */
            handleResponseDatalets : function(e){
                this.datalets_list = new Array();
                for(var i=0;i < e.detail.response.length;i++){
                    var datalet_info = { name : e.detail.response[i].name ,
                                         image : e.detail.response[i].url + e.detail.response[i].name + ".png"
                    };

                    this.datalets_list.push(datalet_info);
                }

                this.$.visualization_slider_area.innerHTML = '<items-slider-controllet items=\'' + JSON.stringify(this.datalets_list) + '\'' +
                                                             '\'></items-slider-controllet>';
            },
            /**
             * Callback to dataset selection from list in the phase three. When a datalet is selected this function will build a bundle of box items, based on the datalet input data model,
             * to allow user to drag the fields, from the selected fields box, and create a new visualization.
             *
             * @method handleSelectedDatalet
             *
             * @param {Event} e
             */
            handleSelectedDatalet : function(e){

               var response = e.detail.response;
               this.$.datalet_idm_fields_container.innerHTML = "";
               this.$.idm_layout_container.innerHTML = "";

               if(response.idm.inputs.input.constructor == Object) {
                   var input = response.idm.inputs.input;
                   if(input.selection == "*") {
                       var input_selected_fields = Polymer.dom(this.$.selected_fields_container).querySelectorAll('draggable-element-controllet');
                       for (var j = 0; j < input_selected_fields.length; j++) {
                           this.$.datalet_idm_fields_container.innerHTML += '<draggable-element-controllet is-target="true" heading="Field ' + (j + 1) + '"  description="' + input.description + '" number="' + (j + 1) + '"></draggable-element-controllet><br>';
                       }
                   }
               }else{
                   for(var i =0; i < response.idm.inputs.input.length; i++){
                       var input = response.idm.inputs.input[i];
                       this.$.datalet_idm_fields_container.innerHTML += '<draggable-element-controllet is-target="true" id="' + input.name + '" heading="' + input.name + '"  description="' + input.description + '" number="' + (i + 1) + '"></draggable-element-controllet><br>';
                   }
               }

               if(response.idm.inputs.layouts.input.constructor == Object) {
                   var input = response.idm.inputs.layouts.input;
                   this.$.idm_layout_container.innerHTML += '<text-element-controllet heading="' + input.name + '" description="' + input.description + '" number="1"></text-element-controllet>';
               }else{
                   for(var i =0; i < response.idm.inputs.layouts.input.length; i++){
                       var input = response.idm.inputs.layouts.input[i];
                       this.$.idm_layout_container.innerHTML += '<text-element-controllet heading="' + input.name + '" ' +
                                                                                         'description="' + input.description + '" ' +
                                                                                         'number="' + (i+1) + '">' +
                                                                '</text-element-controllet>';
                   }

               }

            },
            /**
             * Generate the datalet preview when user mapped fields. it even retrieves the value of layout inputs values.
             *
             * @method generateDataletPreview
             */
            generateDataletPreview : function(){

                var input_mapped_fields = Polymer.dom(this.$.datalet_idm_fields_container).querySelectorAll('draggable-element-controllet[is-target=true]');
                this.selected_fields = Array();

                for (var i = 0; i < input_mapped_fields.length; i++) {
                    if (input_mapped_fields[i].value != "") {
                        this.selected_fields.push(input_mapped_fields[i].value);
                    }
                }

                var input_layouts_fields = Polymer.dom(this.$.idm_layout_container).querySelectorAll('text-element-controllet');
                this.params_fields = {'data-url' : this.dataUrl};

                for (var i = 0; i < input_layouts_fields.length; i++) {
                    if (input_layouts_fields[i].value != "") {
                        this.params_fields[input_layouts_fields[i].heading]  =  input_layouts_fields[i].value;
                    }
                }


                var datalet_params ={
                    component   : this.selected_datalet,
                    params      : this.params_fields,
                    fields      : this.selected_fields,
                    placeHolder : this.$.datalet_placeholder
                };


                ComponentService.deep_url = this.deepUrl;
                ComponentService.getComponent(datalet_params);

            },
            /**
             * Validate the current pass in order to access to next one.
             *
             * @method validateCurrentPass
             *
             * @param {Number} next_selected_pass
             */
            validateCurrentPass : function(next_selected_pass){

                switch(next_selected_pass){
                    case 0:
                        return true;
                    case 1:
                        if(this.$.data_url.value == ""){
                            this.$.message.text = "You have to select a dataset to access to pass 2.";
                            this.$.message.show();
                            return false;
                        }else{
                            return true;
                        }

                    case 2:
                        if(Polymer.dom(this.$.selected_fields_container).querySelectorAll('draggable-element-controllet') == 0){
                            this.$.message.text = "You have to select a set of fields to access to pass 3.";
                            this.$.message.show();
                            return false;
                        }else{
                            return true;
                        }
                }

            },
            /**
             * Callback for manage the previous pass button
             *
             * @method _onPrevClick
             *
             */
            _onPrevClick : function() {
                if(!this.validateCurrentPass(this.selected === 0 ? 0 : (this.selected - 1))) return;

                this.entryAnimation = 'slide-from-left-animation';
                this.exitAnimation  = 'slide-right-animation';
                this.selected = this.selected === 0 ? 0 : (this.selected - 1);
            },
            /**
             * Callback to manage the next pass button
             *
             * @method _onNextClick
             *
             */
            _onNextClick : function() {

                if(!this.validateCurrentPass(this.selected === 2 ? 2 : (this.selected + 1))) return;

                this.entryAnimation = 'slide-from-right-animation';
                this.exitAnimation  = 'slide-left-animation';
                this.selected = this.selected === 2 ? 2 : (this.selected + 1);
            },
            /**
             * Callback to manage InfoButton click to give user information about the selected dataset
             *
             */
            _onInfoClick : function(){

                this.$.infoDialog.open();

            },
            /**
             * Callback related to datasource selection from select menu
             *
             * @method _datasourceSelected
             *
             * @param {Event} e
             */
            _datasourceSelected : function(e){

               this.$.data_url.value = this.datasets[parseInt(e.target.id)].url;
               this.$.infoDialogTitle.innerHTML = this.datasets[parseInt(e.target.id)].name;
               this.$.infoDialogContent.innerHTML = this.datasets[parseInt(e.target.id)].description;

            },
            /**
             * Callback related to data url change
             *
             * @method _dataUrlChanged
             *
             * @param {Event} e
             */
            _dataUrlChanged : function(newValue, oldValue){
                this.$.data_request.generateRequest();
            },
            /**
             * Callback related to event 'items-slider-controllet_item-selected' fired by items-slider-controllet when the user selects a datalet
             *
             * @method _dataletSelected
             *
             * @param {Event} e
             */
            _dataletSelected : function(e){
                this.selected_datalet = e.detail.datalet;
                this.$.selected_datalet_request.url = this.deepUrl + e.detail.datalet;
                this.$.selected_datalet_request.generateRequest();

            },
            /**
             * Callback related to event 'treeview-controllet-fileds-selected' fired by treeview-controllet when the user selects a field
             *
             * @method _fieldsSelected
             *
             * @param {Event} e
             */
            _fieldsSelected : function(e){

                 this.$.selected_fields_container.innerHTML = "";
                 for(var i=0;i<e.detail.fields.length;i++) {
                    this.$.selected_fields_container.innerHTML += '<draggable-element-controllet identifier="' + e.detail.fields[i] +
                                                                                                 '" label="' + e.detail.fields[i].split(",")[e.detail.fields[i].split(",").length -1] +
                                                                  '"></draggable-element-controllet><br>';
                 }

                 var place_holder = (navigator.userAgent.toLowerCase().indexOf('chrome') > -1) ? this.$.table_component_place_holder : this.$.table_component_place_holder[Object.keys(this.$.table_component_place_holder)[0]];

                 var table_params ={
                     component   : "datatable-datalet",
                     params      :{
                        'data-url' : this.dataUrl
                     },
                     fields      : e.detail.fields,
                     placeHolder :  this.$.table_component_place_holder
                 };

                 ComponentService.deep_url = this.deepUrl;
                 ComponentService.getComponent(table_params);

            },
            /**
             * Callback related to event 'draggable-element-controllet_content-dragged' fired by draggable-element-controllet when the user drags a selected field in to input data model field
             *
             * @method _fieldsMapped
             *
             * @param {Event} e
             */
            _fieldsMapped : function(e){

                this.generateDataletPreview();

            },
            /**
             * Callback related to event 'text-element-controllet_content-changed' fired by text-element-controllet when the user change the value of text
             *
             * @method _textElementChanged
             *
             * @param {Event} e
             */
            _textElementChanged : function(e){
                this.generateDataletPreview();
            },
            /**
             * Callback related to the drag operation in the dataUrl input area. It's used to delete previous value.
             *
             * @method _handleDatasourceDragOver
             *
             * @param {Event} e
             */
            _handleDatasourceDragOver : function(e){
                this.$.data_url.value = "";
            },
            /**
             * Callback related to the finish button.
             *
             * @method _onFinish
             *
             * @param {Event} e
             */
            _onFinish : function(e){

                if((this.selected_fields.length == 0) || this.selected_datalet == ""){
                    this.$.message.text = "You have to map the selected fields with datalets fields(by dragging) and select a datalet to export a new visualization.";
                    this.$.message.show();
                    return;
                }

                var data = {
                    dataUrl : this.dataUrl,
                    params :  this.params_fields,
                    fields :  this.selected_fields,
                    datalet : this.selected_datalet,
                    staticData : JSON.stringify(this.$.datalet_placeholder.children[1].behavior.data)
                }

                this.fire('data-sevc-controllet.dataletCreated', {data : data});

            }

        });

    </script>

</dom-module>