chart.php
255 lines
| 1 | <?php |
| 2 | /** |
| 3 | * @package VikAppointments |
| 4 | * @subpackage core |
| 5 | * @author E4J s.r.l. |
| 6 | * @copyright Copyright (C) 2021 E4J s.r.l. All Rights Reserved. |
| 7 | * @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL |
| 8 | * @link https://vikwp.com |
| 9 | */ |
| 10 | |
| 11 | // No direct access |
| 12 | defined('ABSPATH') or die('No script kiddies please!'); |
| 13 | |
| 14 | /** |
| 15 | * Layout variables |
| 16 | * ----------------- |
| 17 | * @var VAPStatisticsWidget $widget The instance of the widget to be displayed. |
| 18 | * @var mixed $data The chart data to immediately display. |
| 19 | */ |
| 20 | extract($displayData); |
| 21 | |
| 22 | // include chart JS dependencies |
| 23 | JHtml::fetch('vaphtml.assets.chartjs'); |
| 24 | |
| 25 | // get list of preset colors |
| 26 | $colors = JHtml::fetch('vaphtml.color.preset', $list = true, $group = false); |
| 27 | |
| 28 | ?> |
| 29 | |
| 30 | <div class="canvas-align-bottom finance-coupons-chart"> |
| 31 | <canvas></canvas> |
| 32 | </div> |
| 33 | |
| 34 | <script> |
| 35 | |
| 36 | /** |
| 37 | * Defines a pool of charts, if undefined. |
| 38 | * |
| 39 | * @var object |
| 40 | */ |
| 41 | if (typeof FINANCE_COUPONS_CHARTS === 'undefined') { |
| 42 | var FINANCE_COUPONS_CHARTS = {}; |
| 43 | } |
| 44 | |
| 45 | // init callbacks pool in case the caller didn't declare it |
| 46 | if (typeof WIDGET_CALLBACKS === 'undefined') { |
| 47 | var WIDGET_CALLBACKS = {}; |
| 48 | } |
| 49 | |
| 50 | (function($) { |
| 51 | 'use strict'; |
| 52 | |
| 53 | // get default system preset of colors |
| 54 | const colorsPreset = <?php echo json_encode($colors); ?>; |
| 55 | |
| 56 | /** |
| 57 | * Register callback to be executed after |
| 58 | * completing the update request. |
| 59 | * |
| 60 | * @param mixed widget The widget selector. |
| 61 | * @param mixed data The AJAX response. |
| 62 | * @param object config The widget configuration. |
| 63 | * |
| 64 | * @return void |
| 65 | */ |
| 66 | WIDGET_CALLBACKS[<?php echo $widget->getID(); ?>] = (widget, data, config) => { |
| 67 | // get widget ID |
| 68 | var id = $(widget).attr('id'); |
| 69 | |
| 70 | // start from first position of the preset |
| 71 | let colorIndex = 0; |
| 72 | |
| 73 | /** |
| 74 | * Create callback used to format the values displayed |
| 75 | * on the Y axis, according to the saved configuration. |
| 76 | * |
| 77 | * @param mixed value The value passed by the chart. |
| 78 | * |
| 79 | * @return string The formatted value. |
| 80 | */ |
| 81 | const formatAxisY = (value) => { |
| 82 | // do not display decimal values on Y axis |
| 83 | return VAPCurrency.getInstance().format(value, 0); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Create callback used to format the values displayed |
| 88 | * with the tooltips of the hovered points, according |
| 89 | * to the saved configuration. |
| 90 | * |
| 91 | * @param mixed item The item to display. |
| 92 | * @param mixed data The chart data. |
| 93 | * |
| 94 | * @return string The formatted value. |
| 95 | */ |
| 96 | const formatPointTooltip = (item, data) => { |
| 97 | // extract coupon code from dataset |
| 98 | let coupon = data.datasets[item.datasetIndex].label; |
| 99 | let label = VAPCurrency.getInstance().format(item.value); |
| 100 | |
| 101 | if (coupon) { |
| 102 | label = coupon + ': ' + label; |
| 103 | } |
| 104 | |
| 105 | // create label in the form "COUPON: TOTAL DISCOUNT" |
| 106 | return ' ' + label; |
| 107 | } |
| 108 | |
| 109 | // prepare chart data |
| 110 | var chartData = { |
| 111 | labels: Object.keys(data), |
| 112 | datasets: {}, |
| 113 | }; |
| 114 | |
| 115 | // iterate all dates |
| 116 | $.each(data, (lbl, coupons) => { |
| 117 | // iterate all coupons |
| 118 | $.each(coupons, (couponCode, value) => { |
| 119 | // check whether we already created the dataset for this coupon code |
| 120 | if (!chartData.datasets.hasOwnProperty(couponCode)) { |
| 121 | // get progressive color |
| 122 | let color = colorsPreset[colorIndex++ % colorsPreset.length]; |
| 123 | |
| 124 | // nope, init data set |
| 125 | chartData.datasets[couponCode] = { |
| 126 | // the label string that appears when hovering the mouse above the lines intersection points |
| 127 | label: couponCode, |
| 128 | // the background color drawn behind the line (33 = 20% opacity) |
| 129 | backgroundColor: "#" + color + "33", |
| 130 | // the fill color of the line |
| 131 | borderColor: "#" + color, |
| 132 | // the fill color of the points |
| 133 | pointBackgroundColor: "#" + color, |
| 134 | // the border color of the points |
| 135 | pointBorderColor: "#fff", |
| 136 | // the radius of the points (in pixel) |
| 137 | pointRadius: 4, |
| 138 | // the fill color of the points when hovered |
| 139 | pointHoverBackgroundColor: "#fff", |
| 140 | // the border color of the points when hovered |
| 141 | pointHoverBorderColor: "#" + color, |
| 142 | // the radius of the points (in pixel) when hovered |
| 143 | pointHoverRadius: 5, |
| 144 | // the line dataset |
| 145 | data: [], |
| 146 | }; |
| 147 | } |
| 148 | |
| 149 | // include value within the dataset |
| 150 | chartData.datasets[couponCode].data.push(value); |
| 151 | }); |
| 152 | }); |
| 153 | |
| 154 | // convert datasets into a linear array |
| 155 | chartData.datasets = Object.values(chartData.datasets); |
| 156 | |
| 157 | // init chart from scratch if NULL |
| 158 | if (!FINANCE_COUPONS_CHARTS.hasOwnProperty(id)) { |
| 159 | // prepare chart configuration |
| 160 | var options = { |
| 161 | legend: { |
| 162 | // draw legend only if we are printing the document and the |
| 163 | // user selected at least a coupon code |
| 164 | display: <?php echo isset($data) && array_filter($widget->getOption('coupons', [])) ? 'true' : 'false'; ?>, |
| 165 | }, |
| 166 | // axes handling |
| 167 | scales: { |
| 168 | // Y Axis properties |
| 169 | yAxes: [{ |
| 170 | // make sure the chart starts at 0 |
| 171 | ticks: { |
| 172 | // format value as currency |
| 173 | callback: formatAxisY, |
| 174 | beginAtZero: true, |
| 175 | }, |
| 176 | }], |
| 177 | }, |
| 178 | // tooltip handling |
| 179 | tooltips: { |
| 180 | // tooltip callbacks are used to customize default texts |
| 181 | callbacks: { |
| 182 | // format the tooltip text displayed when hovering a point |
| 183 | label: formatPointTooltip, |
| 184 | // change label colors because, by default, the legend background is blank |
| 185 | labelColor: (tooltipItem, chart) => { |
| 186 | // get tooltip item meta data |
| 187 | var meta = chart.data.datasets[tooltipItem.datasetIndex]; |
| 188 | |
| 189 | return { |
| 190 | // use white border |
| 191 | borderColor: 'rgb(0,0,0)', |
| 192 | // use same item background color |
| 193 | backgroundColor: meta.borderColor, |
| 194 | }; |
| 195 | }, |
| 196 | }, |
| 197 | }, |
| 198 | animation: { |
| 199 | // unset duration in case we are exporting the chart |
| 200 | duration: <?php echo isset($data) ? 0 : 1000; ?>, |
| 201 | }, |
| 202 | }; |
| 203 | |
| 204 | // get 2D canvas for LINE chart |
| 205 | var canvas = $(widget).find('canvas')[0]; |
| 206 | var ctx = canvas.getContext('2d'); |
| 207 | |
| 208 | // init chart from scratch if undefined |
| 209 | FINANCE_COUPONS_CHARTS[id] = new Chart(ctx, { |
| 210 | type: 'line', |
| 211 | data: chartData, |
| 212 | options: options, |
| 213 | }); |
| 214 | } |
| 215 | // otherwise update labels and values |
| 216 | else { |
| 217 | // update chart data |
| 218 | FINANCE_COUPONS_CHARTS[id].data = chartData; |
| 219 | |
| 220 | // update format callbacks |
| 221 | FINANCE_COUPONS_CHARTS[id].options.scales.yAxes[0].ticks.callback = formatAxisY; |
| 222 | FINANCE_COUPONS_CHARTS[id].options.tooltips.callbacks.label = formatPointTooltip; |
| 223 | |
| 224 | // refresh chart |
| 225 | FINANCE_COUPONS_CHARTS[id].update(); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | <?php |
| 230 | |
| 231 | //////////////////////// |
| 232 | ///// EXPORT UTILS ///// |
| 233 | //////////////////////// |
| 234 | |
| 235 | if (isset($data)) |
| 236 | { |
| 237 | ?> |
| 238 | $(function() { |
| 239 | // auto-invoke callback on page loading completion |
| 240 | WIDGET_CALLBACKS[<?php echo $widget->getID(); ?>]( |
| 241 | // exported assume, there should be only one widget displayed |
| 242 | $('.finance-coupons-chart'), |
| 243 | // JSON-encode the passed chart data |
| 244 | <?php echo json_encode($data); ?>, |
| 245 | // JSON-encode the widget configuration |
| 246 | <?php echo json_encode($widget->getOptions()); ?> |
| 247 | ); |
| 248 | }); |
| 249 | <?php |
| 250 | } |
| 251 | ?> |
| 252 | })(jQuery); |
| 253 | |
| 254 | </script> |
| 255 |