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// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-3.0
'use strict';
/* globals Chart */
function initCharts() {
if (!window.Chart) {
if (window.console) {
console.log('FreshRSS is waiting for Chart.js…');
}
window.setTimeout(initCharts, 25);
return;
}
const jsonData = document.getElementsByClassName('jsonData-stats');
let jsonDataParsed;
let chartConfig;
for (let i = 0; i < jsonData.length; i++) {
jsonDataParsed = JSON.parse(jsonData[i].innerHTML);
switch (jsonDataParsed.charttype) {
case 'bar':
chartConfig = jsonChartBar(jsonDataParsed.label, jsonDataParsed.data, jsonDataParsed.xAxisLabels);
break;
case 'doughnut':
chartConfig = jsonChartDoughnut(jsonDataParsed.labels, jsonDataParsed.data);
break;
case 'barWithAverage':
chartConfig = jsonChartBarWithAverage(jsonDataParsed.labelBarChart, jsonDataParsed.dataBarChart,
jsonDataParsed.labelAverage, jsonDataParsed.dataAverage, jsonDataParsed.xAxisLabels);
}
/* eslint-disable no-new */
new Chart(document.getElementById(jsonDataParsed.canvasID), chartConfig);
/* eslint-enable no-new */
}
// Force resize after clicking enlarge button (needed since chart.js v4)
for (const id in Chart.instances) {
const instance = Chart.instances[id];
const boxTitle = instance.canvas.parentElement.previousElementSibling;
const enlargeBtns = boxTitle.querySelectorAll('a.btn');
function forceResize() {
function waitHash() {
requestAnimationFrame(() => instance.resize());
window.removeEventListener('hashchange', waitHash);
}
instance.resize(); // try early resize
window.addEventListener('hashchange', waitHash);
}
for (const btn of enlargeBtns) {
btn.addEventListener('click', forceResize);
}
}
window.addEventListener('resize', () => {
for (const id in Chart.instances) {
const instance = Chart.instances[id];
// Workaround for a chart.js bug which makes the canvas blurry if
// page was loaded with very low zoom level and later zoomed in
instance.update();
instance.resize();
}
});
if (window.console) {
console.log('Chart.js finished');
}
}
function jsonChartBar(label, data, xAxisLabels = '') {
return {
type: 'bar',
data: {
labels: xAxisLabels,
datasets: [{
label,
backgroundColor: '#0062BD',
borderColor: '#0062BD',
data,
barPercentage: 1.0,
categoryPercentage: 1.0,
order: 2,
}],
},
options: {
scales: {
y: {
beginAtZero: true,
},
x: {
grid: {
display: false,
},
},
},
plugins: {
legend: {
display: false,
},
},
},
};
}
function jsonChartDoughnut(labels, data) {
return {
type: 'doughnut',
data: {
labels,
datasets: [{
backgroundColor: [
'#0b84a5', // petrol
'#f6c85f', // sand
'#6f4e7c', // purple
'#9dd866', // green
'#ca472f', // red
'#ffa056', // orange
'#8dddd0', // turkis
'#f6c85f', // sand
'#6f4e7c', // purple
'#9dd866', // green
'#ca472f', // red
'#ffa056', // orange
'#8dddd0', // turkis
],
data,
}],
},
options: {
layout: {
padding: 20,
},
plugins: {
legend: {
position: 'bottom',
align: 'start',
},
},
},
};
}
function jsonChartBarWithAverage(labelBarChart, dataBarChart, labelAverage, dataAverage, xAxisLabels = '') {
return {
type: 'bar',
data: {
datasets: [
{
// bar chart layout
label: labelBarChart,
backgroundColor: '#0062BD',
borderColor: '#0062BD',
data: dataBarChart,
barPercentage: 1.0,
categoryPercentage: 1.0,
order: 2,
},
{
// average line chart
type: 'line',
label: labelAverage, // Todo: i18n
borderColor: 'rgb(192,216,0)',
data: {
'-30': dataAverage,
'-1': dataAverage,
},
order: 1,
},
],
},
options: {
scales: {
y: {
beginAtZero: true,
},
x: {
ticks: {
callback: function (val) {
if (xAxisLabels.length > 0) {
return xAxisLabels[val];
} else {
return val;
}
},
},
grid: {
display: false,
},
},
},
elements: {
point: {
radius: 0,
},
},
plugins: {
tooltip: {
callbacks: {
title: function (tooltipitem) {
if (xAxisLabels.length > 0) {
return xAxisLabels[tooltipitem[0].dataIndex];
} else {
return tooltipitem[0].label;
}
},
},
},
legend: {
display: false,
},
},
},
};
}
initCharts();
// @license-end
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