Created
April 22, 2022 14:45
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Parses the meta info column from Mtgtop8 to display a nice pie chart of the metagame
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| // example page https://www.mtgtop8.com/archetype?a=816&meta=51&f=MO | |
| function parseData() { | |
| var data = []; | |
| [].forEach.call(document.querySelectorAll(".page table td:first-child .hover_tr"), function(el) { | |
| var tokens = el.textContent.split(/\r?\n/).filter(l => l.trim()).map(l => l.trim()); | |
| if (tokens.length == 2) { | |
| data.push({y: parseFloat(tokens[1].replace(" %", "")), label: tokens[0] }); | |
| } | |
| }); | |
| console.log(data); | |
| return data; | |
| } | |
| function createChart(data) { | |
| // source: https://canvasjs.com/html5-javascript-pie-chart/ | |
| return new CanvasJS.Chart("chartContainer", { | |
| animationEnabled: false, | |
| title: { | |
| text: "METAGAME BREAKDOWN" | |
| }, | |
| data: [{ | |
| type: "pie", | |
| startAngle: 240, | |
| yValueFormatString: "##0.00\"%\"", | |
| indexLabel: "{label} {y}", | |
| dataPoints: [data] | |
| }] | |
| }); | |
| } | |
| var ready = false; | |
| // create the HTML and add it to the page | |
| var canvasElt = document.createElement("div"); | |
| canvasElt.setAttribute('id', 'chartContainer'); | |
| canvasElt.style.cssText = 'height: 370px; width: 100%;'; | |
| document.body.appendChild(canvasElt); | |
| var scriptElt = document.createElement("script"); | |
| scriptElt.type = "text/javascript"; | |
| scriptElt.src = "https://canvasjs.com/assets/script/canvasjs.min.js"; | |
| scriptElt.onload = scriptElt.onreadystatechange = function() { | |
| if ( !ready && (!this.readyState || this.readyState == 'complete') ) { | |
| ready = true; | |
| // do the real stuff | |
| var data = parseData(); | |
| var chart = createChart(); | |
| chart.render(); | |
| } | |
| }; | |
| document.body.appendChild(scriptElt); |
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