paper-datatable-card.html

<link rel="import" href="../polymer/polymer.html">

<link rel="import" href="paper-datatable.html">

<link rel="import" href="../paper-material/paper-material.html">
<link rel="import" href="../paper-dropdown-menu/paper-dropdown-menu.html">
<link rel="import" href="../paper-menu/paper-menu.html">
<link rel="import" href="../paper-button/paper-button.html">
<link rel="import" href="../paper-item/paper-item.html">
<link rel="import" href="../paper-icon-button/paper-icon-button.html">
<link rel="import" href="../paper-progress/paper-progress.html">
<link rel="import" href="../paper-styles/paper-styles.html">
<link rel="import" href="../iron-image/iron-image.html">

<script src="../file-saver/FileSaver.min.js"></script>
<script src="weakCache.js"></script>
<dom-module id="paper-datatable-card">
	<template>
		<style>
			:host {
				display: block;
				@apply(--paper-font-common-base);
			}
			paper-material{
				border-radius: 2px;
				background: white;
				@apply(--paper-datatable-card);
			}
			#selectionToolbar{
				display: none;
				background: var(--paper-datatable-selection-toolbar-color, --paper-pink-50);
				@apply(--paper-datatable-selection-toolbar);
				padding:0px 12px 0px 24px;
			}
			#selectionToolbar .selectionHeader, #selectionToolbar .toolbar ::content paper-icon-button{
				color: var(--paper-datatable-selection-toolbar-text-color, --accent-color);
			}
			#selectionToolbar[data-visible]{
				display: flex;
			}
			#selectionToolbar .toolbar{
				display: none;
			}
			#selectionToolbar .toolbar[data-visible]{
				display: flex;
			}
			#toolbar-main{
				padding-right: 12px;
			}
			#topBlock{
				height:64px;
				padding:0px 6px 0px 24px;
				position:relative;
				@apply(--paper-datatable-top-toolbar);
			}
			#topBlock .header{
				font-size:20px;
				@apply(--paper-font-common-base);
				color: var(--paper-datatable-top-toolbar-text-color);
			}
			#selectionToolbar > ::content paper-icon-button, .toolbar > ::content paper-icon-button,
			#selectionToolbar > ::content paper-icon, .toolbar > ::content paper-icon,
			#selectionToolbar > ::content iron-icon, .toolbar > ::content iron-icon{
				color: var(--paper-datatable-selection-toolbar-icon-color, rgba(0,0,0,.54));
			}
			#toolbar-main ::content paper-icon-button, #toolbar-main ::content paper-icon, #toolbar-main ::content iron-icon{
				color: var(--paper-datatable-top-toolbar-icon-color);
			}
			#topBlock .selectionHeader{
				font-size:16px;
				@apply(--paper-font-common-base);
			}
			#topBlock .dg-desc {
				@apply(--paper-datatable-card-download-desc);
			}
			#topBlock .dg-buttons {
				@apply(--paper-datatable-card-download-button-group);
			}
			#topBlock .dg-button {
				@apply(--paper-datatable-card-download-button);
			}
			#bottomBlock{
				height:56px;
				padding:0px 6px;
				border-top: 1px solid var(--paper-datatable-divider-color, --divider-color);
				color: var(--paper-datatable-navigation-bar-text-color, rgba(0,0,0,.54));
				align-items: center;
				font-size: 12px;
				text-align: center;
				font-weight: 500;
				@apply(--paper-datatable-navigation-bar);
			}
			#bottomBlock paper-dropdown-menu{
				vertical-align: middle;
				margin-right: 18px;
				--paper-input-container-underline: {
					display: none;
				};
				--paper-input-container-input: {
					text-align: right;
					font-size: 12px;
					font-weight: 500;
					color: var(--paper-datatable-navigation-bar-text-color, rgba(0,0,0,.54));
				};
				--paper-dropdown-menu-icon: {
					color: var(--paper-datatable-navigation-bar-text-color, rgba(0,0,0,.54));
				};
			}
			#bottomBlock .page-count {
				padding: 0 20px 0 0;
				@apply(--paper-datatable-card-page-count);
			}
			#bottomBlock .pagination-container {
				padding: 0 20px 0 0;
				@apply(--paper-datatable-card-pagination-container);
			}
			#bottomBlock .pagination-container paper-button {
				min-width: 30px;
				@apply(--paper-datatable-card-pagination);
			}
		</style>
		<paper-material elevation="1">
			<div class="horizontal center layout" id="topBlock">
				<div class="flex header">
					<span>{{header}}</span>
				</div>
				<div id="toolbar-main" class="toolbar">
					<content select="*[toolbar-main]"></content>
				</div>
				<template is="dom-if" if="{{_hasDownload(csvData, pdfData)}}">
					<div class="dg-desc">Export as:</div>
			    <div class="dg-buttons">
						<template is="dom-if" if="{{_hasCSVDownload(csvData)}}">
				      <a class="dg-button buttons-csv" on-tap="download" data-download="csv" href="#">
				        <span data-download="csv">CSV</span>
				      </a>
						</template>
						<template is="dom-if" if="{{_hasPDFDownload(pdfData)}}">
				      <a class="dg-button buttons-pdf" data-download="pdf" href="{{pdfData}}" target="_blank">
				        <span data-download="pdf">PDF</span>
				      </a>
						</template>
			    </div>
				</template>
				<div id="selectionToolbar" class="horizontal center layout fit" data-visible$="[[_selectedToolbarVisible]]">
					<div class="flex selectionHeader">
						<span>[[_numberselectedIds]]</span> item selected
					</div>
					<div class="toolbar" data-visible$="{{_singleSelectToolbarVisible}}">
						<content select="*[toolbar-select-single]"></content>
					</div>
					<div class="toolbar" data-visible$="{{_multiSelectToolbarVisible}}">
						<content select="*[toolbar-select-multi]"></content>
					</div>
					<div class="toolbar" data-visible>
						<content select="*[toolbar-select]"></content>
					</div>
				</div>
			</div>
			<div>
				<content select="paper-datatable"></content>
			</div>
			<div class="horizontal center layout" id="bottomBlock">
				<div class="flex"></div>
				<span>Rows per page:</span>
				<paper-dropdown-menu no-label-float style="width: 68px;">
					<paper-menu class="dropdown-content" selected="{{pageSize}}" attr-for-selected="value">
						<template is="dom-repeat" items="{{pageSizeOptions}}">
							<paper-item value="{{item}}">{{item}}</paper-item>
						</template>
					</paper-menu>
				</paper-dropdown-menu>
				<span class="page-count">
					<span>[[_getRangeStart(page, pageSize)]]</span>-<span>[[_getRangeEnd(page, pageSize, numberOfItems)]]</span> of&nbsp;<span>[[numberOfItems]]</span>
				</span>
				<paper-icon-button icon="datatable:first-page" on-tap="firstPage" disabled="[[_prevPageDisabled(page)]]"></paper-icon-button>
				<paper-icon-button icon="datatable:prev-page" on-tap="prevPage" disabled="[[_prevPageDisabled(page)]]"></paper-icon-button>
				<span class="pagination-container">
					<template id="pagination" is="dom-repeat" items="{{_getPaginationButtons(page, pageSize, numberOfItems)}}">
						<template is="dom-if" if="{{_isCurrentPage(item, page)}}">
							<paper-button disabled>{{item}}</paper-button>
						</template>
						<template is="dom-if" if="{{!_isCurrentPage(item, page)}}">
							<a on-click="gotoPage" tabindex="-1">
								<paper-button raised>{{item}}</paper-button>
							</a>
						</template>
					</template>
				</span>
				<paper-icon-button icon="datatable:next-page" on-tap="nextPage" disabled="[[_nextPageDisabled(page, pageSize, numberOfItems)]]"></paper-icon-button>
				<paper-icon-button icon="datatable:last-page" on-tap="lastPage" disabled="[[_nextPageDisabled(page, pageSize, numberOfItems)]]"></paper-icon-button>
			</div>
		</paper-material>
	</template>

	<script>
		(function () {
			'use strict';

			/*
			 A [material design implementation of the tables within cards spec](https://www.google.com/design/spec/components/data-tables.html#data-tables-tables-within-cards).


			 @element paper-datatable-card
			 @demo demo/users-card.html Polished demo
			 @demo demo/paper-datatable-card.html Complex demo
			 */

			Polymer({

				is: 'paper-datatable-card',
				properties: {
					/**
					 * Heading shown above the data table
					 *
					 * @attribute String
					 * @default ''
					 * @type Object
					 */
					header: String,
					/**
					 * See general documentation.
					 *
					 * @attribute dataSource
					 * @type Object
					 */
					dataSource: {
						type: Object,
						notify: true
					},
					/**
					 * Number of items per page
					 *
					 * @attribute pageSize
					 * @default 10
					 * @type Number
					 */
					pageSize: {
						type: Number,
						value: 10,
						notify: true
					},
					/**
					 * Possible number of items per page
					 *
					 * @attribute pageSizeOptions
					 * @default [5, 10, 25, 100]
					 * @type Array
					 */
					pageSizeOptions: {
						type: Array,
						value: [5, 10, 25, 100],
						notify: true
					},
					/**
					 * Current page shown
					 *
					 * @attribute Number
					 * @default 1
					 * @type Object
					 */
					page: {
						type: Number,
						value: 1,
						notify: true
					},
					/**
					 * Data for CSV
					 *
					 * @attribute csvData
					 * @default ''
					 * @type String
					 */
					csvData: {
						type: String,
						value: '',
						notify: true
					},
					/**
					 * Data for PDF
					 *
					 * @attribute pdfData
					 * @default ''
					 * @type String
					 */
					pdfData: {
						type: String,
						value: '',
						notify: true
					},
					_disableSave: {
						type: Boolean,
						value: false
					},
					_datatable: {
						type: Object
					},
					/**
					 * Used when the value is `undefined`.
					 *
					 * @attribute default
					 * @type Object
					 */
					default: {
						type: Object
					},
					/**
					 * Property containing the `id` of every row. It is **important** this is available for multi-page selection to work
					 *
					 * @attribute idProperty
					 * @type String
					 * @default 'id'
					 * @required
					 */
					idProperty: {
						type: String,
						value: 'id'
					},
					/**
					 * An array of selected row id's.
					 *
					 * @attribute selectedIds
					 * @type Array
					 * @default []
					 */
					selectedIds: {
						type: Array,
						notify: true,
						value: []
					},
					_cacheUsed: {
						type: Boolean
					},
					_sortDirection: {
						type: String,
						value: 'asc'
					},
					_sortProperty: {
						type: String
					},
					_selectedToolbarVisible: Boolean,
					_singleSelectToolbarVisible: Boolean,
					_multiSelectToolbarVisible: Boolean,
					_numberselectedIds: Number
				},
				ready: function(){
					this._datatable = Polymer.dom(this).querySelector("paper-datatable");
					this._datatable.data = [];
					this._datatable.addEventListener("data-changed", this._triggerSave.bind(this));
					this._datatable.addEventListener("sort", this._handleSort.bind(this));
					this._datatable.addEventListener("selection-changed", this._setSelectedIds.bind(this));
					this._datatable.addEventListener("selection-changed", this._setSelectedToolbarVisible.bind(this));
					this._datatable.addEventListener("toggle-all", this._toggleAll.bind(this));
					this._datatable.set('progress', true);
					this._datatable._setPartialSelection = function(){};
					this.set('selectedIds', []);
					this.set('_sortProperty', this.idProperty);
				},
				observers: [
					'retrieveVisibleData(dataSource, pageSize, page, _datatable, _sortDirection, _sortProperty)',
					'_createCache(dataSource.queryForIds)',
					'_getSelectedPageSize(pageSize)',
					'_hasDownload(csvData, pdfData)',
					'_hasCSVDownload(csvData)',
					'_hasPDFDownload(pdfData)'
				],
				_createCache: function(){
					this._cacheUsed = true;
					this._cache = new WeakCache(100);
				},
				_triggerSave: function(ev){
					if(this.dataSource) {
						if (!this._disableSave && ev.detail.path) {
							var path = ev.detail.path.split(".");
							if (path.length == 2) {
								return;
							}
							var item = path.shift();
							var rowKey = path.shift();
							var property = path.shift();
							this.debounce('save'+rowKey+property, function(){
								var value = ev.detail.value;
								var data = this._datatable.get(['data', rowKey]);
								if(!data){
									return console.warn('Some elements (like the \<google-map\>) will trigger erroneous' +
											' change notifications. Sadly this causes the paper-datatable to error out' +
											' when browsing too quickly.');
								}
								var id = data[this.idProperty];
								// setting properties in the `set` functions causes trouble, so it's more sensible for that
								// to simply have no effect rather than make the entire element break, especially
								// as the 'no effect' version can be useful (see paper-datatable-card.html demo)
								var dataClone = JSON.parse(JSON.stringify(data));

								if (path.length > 0) {
									value = dataClone[property];
									var setPromise = this.dataSource.set(dataClone, property, value);
								} else {
									var setPromise = this.dataSource.set(dataClone, property, value);
								}

								this._datatable.set('progress', true);
								setPromise.then(function (successOrId) {
									if (typeof successOrId === 'boolean') {
										if (successOrId !== true) {
											throw new Error('failure');
										}
									} else {
										console.warn('re-implement')
										//var index = this._datatable._getIndexById('__new__');
										//this._datatable.set(['data', index, this._datatable.idProperty], successOrId);
									}
									this._datatable.set('progress', false);
								}.bind(this), function (err) {
									throw new Error('failure');
									this._datatable.set('progress', false);
								}.bind(this)).catch(function () {
									console.warn('saving failed');
									this._datatable.set('progress', false);
								}.bind(this));
							}, 1000);
						}
					}
				},
				_handleSort: function(ev){
					if(this.dataSource) {
						ev.preventDefault();
						this.firstPage();
						this._sortProperty = ev.detail.sort.property;
						this._sortDirection = ev.detail.sort.direction;

						//this.retrieveVisibleData();
					}
				},
				/**
				 * Call this function to trigger reloading of the current page
				 */
				retrieveVisibleData: function(){

					this.debounce("visibleData", function(){
						this._disableSave = true;

						var processItems = function(items){

							this._datatable.deselectAll(false);
							this._datatable.splice('data', 0, this._datatable.data.length);

							var args = ['data'].concat(items);
							this._datatable.push.apply(this._datatable,args);
							this._setNumberOfItems();
							this._setSelectedKeysOnDatatable();
							this._datatable.set('progress', false);

							this._disableSave = false;

							// no rush, so let's do it next tick
							this.async(function(){
								items.forEach(function(item){
									this._cache.set(item[this.idProperty], item);
								}.bind(this));
							});

						}.bind(this);

						var queryArgs = [{
							property: this._sortProperty,
							direction: this._sortDirection
						}, this.page, this.pageSize];

						if('queryForIds' in this.dataSource){
							this.dataSource.queryForIds.apply(this.dataSource, queryArgs).then(function(ids){
								var items = [];
								var i = 0;
								var done = function(){
									i++;
									if(i == 2){
										var sortedItems = ids.map((id) => items.find((item) => item[this.idProperty] == id));
										processItems(sortedItems);
									}
								}.bind(this);

								var idsInCache = ids.filter((id) => this._cache.has(id));
								if(idsInCache.length){
									var cacheItems = [];
									idsInCache.forEach(function(id){
										cacheItems.push(this._cache.get(id));
									}.bind(this));
									items = items.concat(cacheItems);
									done();
								}else{
									done();
								}

								var idsNotInCache = ids.filter((id) => !this._cache.has(id));
								if(idsNotInCache.length){
									this.dataSource.getByIds(idsNotInCache).then(function(newItems){
										items = items.concat(newItems);
										done();
									});
								}else{
									done();
								}



							}.bind(this));

						}else{
							if (this.dataSource.length === 0) return;
							this.dataSource.get.apply(this.dataSource, queryArgs).then(function(items){
								processItems(items);
							});
						}
					}, 0);

				},
				_getRangeStart: function(){
					return (this.page-1)*this.pageSize;
				},
				_getRangeEnd: function(){
					return Math.min((this.page)*this.pageSize, this.numberOfItems);
				},
				/**
				 * Reset the page number when page size is updated
				 */
				_getSelectedPageSize: function(event) {
					this.set("page", 1);
				},
				/**
				 * Populate pagination
				 */
				_getPaginationButtons: function() {
					var pagination = [];
					var totalPages = Math.ceil(this.dataSource.length / this.pageSize);
					var maxPage, maxPivotPages, minPage, pages, maxBlocks;
					var paginationMaxBlocks = 11;
					var paginationMinBlocks = 5;
          maxBlocks = maxBlocks && maxBlocks < 6 ? 6 : maxBlocks;
					if (totalPages > 1) {
						maxPivotPages = Math.round((paginationMaxBlocks - paginationMinBlocks) / 2);
	          minPage = Math.max(2, this.page - maxPivotPages);
	          maxPage = Math.min(totalPages - 1, this.page + maxPivotPages * 2 - (this.page - minPage));
	          minPage = Math.max(2, minPage - (maxPivotPages * 2 - (maxPage - minPage)));
						var i = minPage;
						pagination.push(1);
	          while (i <= maxPage) {
	            if ((i === minPage && i !== 2) || (i === maxPage && i !== totalPages - 1)) {
	                pagination.push('...');
	            } else {
	                pagination.push(i);
	            }
	            i++;
	          }
						pagination.push(totalPages);
					}
					return pagination;
				},
				/**
				 * Return if the pagination button is the selected
				 */
			 	_isCurrentPage: function(item, page) {
				 	return page === item;
			 	},
				/**
				 * Navigate to the next page
				 */
				nextPage: function(){
					this.set("page", this.page+1);
				},
				/**
				 * Navigate to page
				 */
				gotoPage: function(event){
					var pageNum = event.model.item;
					if (pageNum !== '...') {
						this.set("page", pageNum);
					}
					//this.$.pagination.render();
				},
				/**
				 * Navigate to the previous page
				 */
				prevPage: function(){
					this.set("page", this.page-1);
				},
				/**
				 * Navigate to the first page
				 */
				firstPage: function(){
					this.set("page", 1);
				},
				/**
				 * Navigate to the last page
				 */
				lastPage: function(){
					this.set("page", Math.ceil(this.numberOfItems / this.pageSize));
				},
				_prevPageDisabled: function(){
					return this.page == 1;
				},
				_nextPageDisabled: function(){
					return this.page * this.pageSize >= this.numberOfItems;
				},
				_setSelectedToolbarVisible: function(){
					this._selectedToolbarVisible = this.selectedIds.length > 0;
					this._singleSelectToolbarVisible = this.selectedIds.length == 1;
					this._multiSelectToolbarVisible = this.selectedIds.length > 1;
					this._numberselectedIds = this.selectedIds.length;
					this._datatable._partialSelection = this.selectedIds.length > 0;
				},
				_setSelectedIds: function(ev){
					if(ev.detail.selected){
						if(!this._datatable.multiSelection){
							this.splice('selectedIds', 0, 1);
						}
						ev.detail.selected.forEach(function(key){
							var id = this._datatable._getByKey(key)[this.idProperty];
							if(this.selectedIds.indexOf(id) == -1){
								this.push('selectedIds', id);
							}
						}.bind(this));
					}
					if(ev.detail.deselected){
						ev.detail.deselected.forEach(function(key){
							var id = this._datatable._getByKey(key)[this.idProperty];
							if(this.selectedIds.indexOf(id) > -1){
								this.splice('selectedIds', this.selectedIds.indexOf(id), 1);
							}
						}.bind(this));
					}
				},
				_setSelectedKeysOnDatatable: function(){
					this._datatable.data.forEach(function(item){
						var id = item[this.idProperty];
						if(this.selectedIds.indexOf(id) > -1){
							this._datatable.select(item, false);
						}
					}.bind(this));
				},
				_setNumberOfItems: function() {
					this.set('numberOfItems', this.dataSource.length);
				},
				_toggleAll: function(ev){
					if(this.dataSource){
						if('queryForIds' in  this.dataSource){
							if(this.selectedIds.length === this.dataSource.length){
								this.deselectAll();
							}else{
								this.deselectAll();
								this._datatable.set('progress', true);
								this.dataSource.queryForIds(undefined, 1, this.dataSource.length).then(function(ids){
									this._datatable.set('progress', undefined);
									this.push.apply(this, ['selectedIds'].concat(ids));
									this._setSelectedKeysOnDatatable();
									this._setSelectedToolbarVisible();
								}.bind(this));
							}
							ev.preventDefault();
						}
					}
				},
				/**
				 * Check if the table has CSV data
				 */
				_hasCSVDownload: function() {
					return this.csvData !== '';
				},
				/**
				 * Check if the table has PDF data
				 */
				_hasPDFDownload: function() {
					return this.pdfData !== '';
				},
				/**
				 * Check if the table has CSV or PDF Data, will be used to show hide Export option
				 */
				_hasDownload: function() {
					return this._hasCSVDownload() || this._hasPDFDownload();
				},
				/**
				 * Download
				 */
				download: function(e) {
					var fileType = e.target.getAttribute('data-download');
					var contentType = (fileType === 'csv') ? 'text/csv' : 'application/pdf';
					var data = (fileType === 'csv') ? this.csvData : this.pdfData;
					var fileName = this.header.replace(/\s+/g, '');

					const blob = new Blob([data], {
						type: contentType
					});
					saveAs(blob, fileName + '.' + fileType);
				},
				/**
				 * Deselect all items
				 */
				deselectAll: function(){
					this._datatable.deselectAll(false);
					this.splice('selectedIds', 0, this.selectedIds.length);
					this._setSelectedToolbarVisible();
				},
				/**
				 * Select the item with the specified id
				 * @param id
				 */
				select: function(id){
					this.push('selectedIds', id);
					this._setSelectedKeysOnDatatable();
					this._setSelectedToolbarVisible();
				}

			});

		})();
	</script>

</dom-module>