discourse/app/assets/javascripts/admin/components/dashboard-mini-chart.js.es6

161 lines
4.1 KiB
JavaScript

import { ajax } from 'discourse/lib/ajax';
import computed from 'ember-addons/ember-computed-decorators';
import loadScript from 'discourse/lib/load-script';
export default Ember.Component.extend({
classNames: ["dashboard-mini-chart"],
classNameBindings: ["trend", "oneDataPoint", "isLoading"],
isLoading: false,
total: null,
trend: null,
title: null,
chartData: null,
oneDataPoint: false,
backgroundColor: "rgba(200,220,240,0.3)",
borderColor: "#08C",
didUpdateAttrs() {
this._super();
loadScript("/javascripts/Chart.min.js").then(() => {
if (this.get("model") && !this.get("chartData")) {
this._setPropertiesFromModel(this.get("model"));
this._drawChart();
} else if (this.get("dataSource")) {
this._fetchReport();
}
});
},
@computed("dataSourceName")
dataSource(dataSourceName) {
if (dataSourceName) {
return `/admin/reports/${dataSourceName}`;
}
},
@computed("trend")
trendIcon(trend) {
if (trend === "stable") {
return null;
} else {
return `angle-${trend}`;
}
},
_fetchReport() {
if (this.get("isLoading")) return;
this.set("isLoading", true);
let payload = {data: {}};
if (this.get("startDate")) {
payload.data.start_date = this.get("startDate").toISOString();
}
if (this.get("endDate")) {
payload.data.end_date = this.get("endDate").toISOString();
}
ajax(this.get("dataSource"), payload)
.then((response) => {
this._setPropertiesFromModel(response.report);
})
.finally(() => {
this.set("isLoading", false);
Ember.run.schedule("afterRender", () => {
if (!this.get("oneDataPoint")) {
this._drawChart();
}
});
});
},
_drawChart() {
const context = this.$(".chart-canvas")[0].getContext("2d");
const data = {
labels: this.get("chartData").map(r => r.x),
datasets: [{
data: this.get("chartData").map(r => r.y),
backgroundColor: this.get("backgroundColor"),
borderColor: this.get("borderColor")
}]
};
this._chart = new window.Chart(context, this._buildChartConfig(data));
},
_setPropertiesFromModel(model) {
this.setProperties({
oneDataPoint: (this.get("startDate") && this.get("endDate")) &&
this.get("startDate").isSame(this.get("endDate"), 'day'),
total: model.total,
title: model.title,
trend: this._computeTrend(model.total, model.prev30Days),
chartData: model.data
});
},
_buildChartConfig(data) {
const values = this.get("chartData").map(d => d.y);
const max = Math.max(...values);
const min = Math.min(...values);
const stepSize = Math.max(...[Math.ceil((max - min)/5), 20]);
const startDate = this.get("startDate") || moment();
const endDate = this.get("endDate") || moment();
const datesDifference = startDate.diff(endDate, "days");
let unit = "day";
if (datesDifference >= 366) {
unit = "quarter";
} else if (datesDifference >= 61) {
unit = "month";
} else if (datesDifference >= 14) {
unit = "week";
}
return {
type: "line",
data,
options: {
legend: { display: false },
responsive: true,
layout: { padding: { left: 0, top: 0, right: 0, bottom: 0 } },
scales: {
yAxes: [
{
display: true,
ticks: { suggestedMin: 0, stepSize, suggestedMax: max + stepSize }
}
],
xAxes: [
{
display: true,
type: "time",
time: {
parser: "YYYY-MM-DD",
unit
}
}
],
}
},
};
},
_computeTrend(total, prevTotal) {
const percentChange = ((total - prevTotal) / prevTotal) * 100;
if (percentChange > 50) return "double-up";
if (percentChange > 0) return "up";
if (percentChange === 0) return "stable";
if (percentChange < 50) return "double-down";
if (percentChange < 0) return "down";
},
});