549 lines
14 KiB
Vue
549 lines
14 KiB
Vue
<template>
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<div>
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<div
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class="overflow-x-auto overflow-x-md-hidden chart-container border-1"
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@mouseleave="onMouseLeave"
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>
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<div
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:style="{
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position: 'relative',
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height: '240px',
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width: `${chartWidth}px`,
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}"
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class="user-select-none"
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>
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<!-- @vue-ignore -->
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<Bar ref="chart" :data="chartData" :options="options" />
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</div>
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</div>
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</div>
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</template>
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<script lang="ts">
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import { defineComponent, type PropType } from "vue";
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import { Bar } from "vue-chartjs";
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import {
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BarController,
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BarElement,
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LineController,
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LineElement,
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LinearScale,
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TimeSeriesScale,
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Legend,
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Tooltip,
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PointElement,
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Filler,
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type ChartEvent,
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type ActiveElement,
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Chart,
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} from "chart.js";
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import ChartDataLabels, { type Context } from "chartjs-plugin-datalabels";
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import "chartjs-adapter-dayjs-4/dist/chartjs-adapter-dayjs-4.esm";
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import { registerChartComponents, commonOptions } from "../Sessions/chartConfig";
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import formatter, { POWER_UNIT } from "@/mixins/formatter";
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import colors, { lighterColor } from "@/colors";
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import type { CURRENCY } from "@/types/evcc";
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import { ForecastType, highestSlotIndexByDay } from "@/utils/forecast";
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import type { ForecastSlot, SolarDetails, TimeseriesEntry } from "./types";
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registerChartComponents([
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BarController,
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BarElement,
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LineController,
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LineElement,
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Filler,
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LinearScale,
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TimeSeriesScale,
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Legend,
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Tooltip,
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PointElement,
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ChartDataLabels,
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]);
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export default defineComponent({
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name: "ForecastChart",
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components: { Bar },
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mixins: [formatter],
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props: {
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grid: { type: Array as PropType<ForecastSlot[]> },
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solar: { type: Object as PropType<SolarDetails> },
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co2: { type: Array as PropType<ForecastSlot[]> },
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currency: { type: String as PropType<CURRENCY> },
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selected: { type: String as PropType<ForecastType> },
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},
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emits: ["selected"],
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data(): {
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selectedIndex: number | null;
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startDate: Date;
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interval: ReturnType<typeof setTimeout> | null;
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ignoreEvents: boolean;
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ignoreEventsTimeout: ReturnType<typeof setTimeout> | null;
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animations: boolean;
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} {
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return {
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selectedIndex: null,
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startDate: new Date(),
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interval: null,
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ignoreEvents: false,
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ignoreEventsTimeout: null,
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animations: false,
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};
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},
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computed: {
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endDate() {
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const end = new Date(this.startDate);
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end.setHours(end.getHours() + 96);
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return end;
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},
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solarEntries() {
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return this.filterEntries(this.solar?.timeseries || []);
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},
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gridSlots() {
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return this.filterSlots(this.grid);
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},
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co2Slots() {
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return this.filterSlots(this.co2);
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},
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maxPriceIndex() {
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return this.maxIndex(this.gridSlots);
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},
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minPriceIndex() {
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return this.minIndex(this.gridSlots);
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},
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maxCo2Index() {
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return this.maxIndex(this.co2Slots);
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},
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minCo2Index() {
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return this.minIndex(this.co2Slots);
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},
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maxSolarIndex() {
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return this.maxEntryIndex(this.solarEntries);
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},
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solarHighlights() {
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const { today, tomorrow, dayAfterTomorrow } = this.solar || {};
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return [
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{
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index: highestSlotIndexByDay(this.solarEntries, 0),
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energy: today?.energy,
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},
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{
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index: highestSlotIndexByDay(this.solarEntries, 1),
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energy: tomorrow?.energy,
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},
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{
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index: highestSlotIndexByDay(this.solarEntries, 2),
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energy: dayAfterTomorrow?.energy,
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},
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];
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},
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chartData() {
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const datasets = [];
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if (this.solarEntries.length > 0) {
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const active = this.selected === ForecastType.Solar;
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const color = active ? colors.self : colors.border;
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datasets.push({
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label: ForecastType.Solar,
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type: "line",
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data: this.solarEntries.map((entry, index) => {
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return {
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y: entry.val,
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x: new Date(entry.ts),
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highlight:
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active &&
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(this.selectedIndex !== null
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? this.selectedIndex === index
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: this.solarHighlights.find(({ index: i }) => i === index)
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?.energy),
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};
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}),
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yAxisID: "yForecast",
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backgroundColor: lighterColor(color),
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borderColor: color,
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fill: "start",
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tension: 0.05,
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pointRadius: 0,
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animation: {
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y: { duration: this.animations ? 500 : 0 },
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},
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pointHoverRadius: active ? 4 : 0,
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spanGaps: true,
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order: active ? 0 : 1,
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});
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}
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if (this.gridSlots && this.gridSlots.length > 0) {
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const active = this.selected === ForecastType.Price;
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const color = active ? colors.price : colors.border;
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datasets.push({
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label: ForecastType.Price,
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data: this.gridSlots.map((slot, index) => ({
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y: slot.value,
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x: new Date(slot.start),
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highlight:
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active &&
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(this.selectedIndex !== null
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? this.selectedIndex === index
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: index === this.maxPriceIndex || index === this.minPriceIndex),
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})),
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yAxisID: "yPrice",
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borderRadius: 2,
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backgroundColor: color,
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borderColor: color,
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order: active ? 0 : 1,
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});
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}
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if (this.co2Slots && this.co2Slots.length > 0) {
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const active = this.selected === ForecastType.Co2;
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const color = active ? colors.co2 : colors.border;
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datasets.push({
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label: ForecastType.Co2,
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type: "line",
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data: this.co2Slots.map((slot, index) => {
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const dataActive =
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active &&
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(this.selectedIndex !== null
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? this.selectedIndex === index
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: index === this.maxCo2Index || index === this.minCo2Index);
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return {
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y: slot.value,
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x: new Date(slot.start),
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highlight: dataActive,
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active: dataActive,
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};
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}),
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yAxisID: "yCo2",
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backgroundColor: color,
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borderColor: color,
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tension: 0.05,
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pointRadius: 0,
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pointHoverRadius: active ? 4 : 0,
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spanGaps: true,
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order: active ? 0 : 1,
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});
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}
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return {
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datasets,
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};
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},
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chartDataMaxDate() {
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let result: Date | null = null;
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for (const dataset of this.chartData.datasets) {
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for (const data of dataset.data) {
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if (!result || data.x.getTime() > result.getTime()) result = data.x;
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}
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}
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return result;
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},
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chartWidth() {
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const minWidth = 780;
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const maxWidth = 1500; // allow diagram to to grow depending on available data
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const realEndDate = this.chartDataMaxDate;
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if (!realEndDate) return minWidth;
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const maxRange = this.endDate.getTime() - this.startDate.getTime();
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const realRange = realEndDate.getTime() - this.startDate.getTime();
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if (maxRange <= 0 || realRange <= 0) return minWidth;
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const scale = realRange / maxRange;
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return Math.round(Math.min(maxWidth, Math.max(minWidth, scale * maxWidth)));
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},
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options() {
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// oxlint-disable-next-line @typescript-eslint/no-this-alias
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const vThis = this;
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return {
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...commonOptions,
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locale: this.$i18n?.locale,
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layout: { padding: { top: 32 } },
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color: colors.text,
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borderSkipped: false,
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animation: {
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duration: 500, // --evcc-transition-medium
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colors: true,
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numbers: false,
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},
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interaction: {
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mode: "index",
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axis: "x",
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intersect: false,
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},
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categoryPercentage: 0.7,
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events: ["mousemove", "click", "touchstart", "touchend"],
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onHover(event: ChartEvent, active: ActiveElement[], chart: Chart) {
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if (["touchend", "click"].includes(event.type)) {
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vThis.selectIndex(null, true);
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return;
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}
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const element = active.find(({ datasetIndex }) => {
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const { label } = chart.getDatasetMeta(datasetIndex);
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return label === vThis.selected;
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});
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vThis.selectIndex(element ? element.index : null);
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},
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plugins: {
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...commonOptions.plugins,
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datalabels: {
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backgroundColor(context: Context) {
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return context.dataset.borderColor;
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},
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align({ chart, dataset, dataIndex }: Context) {
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const scale = chart.scales["x"] as any;
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const { min, max } = scale;
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// @ts-expect-error no-explicit-any
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const time = new Date(dataset.data[dataIndex]?.x).getTime();
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// percent along the x axis (0: start, 1: end)
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const percent = (time - min) / (max - min);
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let adjust = 0;
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const step = 20;
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// tilt label left/right if it's close to the edge
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if (percent < 0.02) {
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adjust = 2;
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} else if (percent < 0.04) {
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adjust = 1;
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} else if (percent > 0.98) {
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adjust = -2;
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} else if (percent > 0.96) {
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adjust = -1;
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}
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return -90 + adjust * step;
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},
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anchor: "end",
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offset: 8,
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padding(context: Context) {
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const data = context.dataset.data[context.dataIndex];
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// @ts-expect-error no-explicit-any
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const x = typeof data.highlight === "number" ? 32 : 8;
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return {
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x,
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y: 4,
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};
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},
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borderRadius: 4,
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color: colors.background,
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font: { weight: "bold" },
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// @ts-expect-error no-explicit-any
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formatter(value, context: Context) {
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if (value.highlight) {
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switch (context.dataset.label) {
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case ForecastType.Price:
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return vThis.fmtPricePerKWh(
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value.y,
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vThis.currency,
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true,
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true
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);
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case ForecastType.Co2:
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return vThis.fmtGrams(value.y);
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case ForecastType.Solar:
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if (value.highlight === true) {
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return vThis.fmtW(value.y, POWER_UNIT.AUTO);
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} else {
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return vThis.fmtWh(value.highlight, POWER_UNIT.AUTO);
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}
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default:
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return null;
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}
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}
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return null;
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},
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},
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tooltip: null,
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},
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scales: {
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x: {
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type: "timeseries",
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display: true,
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time: { unit: "day" },
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border: { display: false },
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grid: {
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display: true,
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color: colors.border,
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offset: false,
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// @ts-expect-error no-explicit-any
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lineWidth(context) {
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if (context.type !== "tick") {
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return 0;
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}
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const label = context.tick?.label;
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return Array.isArray(label) ? 1 : 0;
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},
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},
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min: this.startDate,
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max: this.endDate,
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ticks: {
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color: colors.muted,
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autoSkip: false,
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maxRotation: 0,
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minRotation: 0,
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source: "data",
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align: "center",
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callback(value: number) {
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const date = new Date(value);
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const hour = date.getHours();
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const minute = date.getMinutes();
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if (minute !== 0) {
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return "";
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}
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const hourFmt = vThis.hourShort(date);
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if (hour === 0) {
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return [hourFmt, vThis.weekdayShort(date)];
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}
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if (hour % 6 === 0) {
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return hourFmt;
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}
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return "";
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},
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},
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},
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yForecast: {
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...this.yScaleOptions(ForecastType.Solar),
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min: 0,
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max: this.yMaxEntry(this.solarEntries, this.solar?.scale),
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beginAtZero: true,
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},
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yCo2: {
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...this.yScaleOptions(ForecastType.Co2),
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min: 0,
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max: this.yMax(this.co2Slots),
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},
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yPrice: {
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...this.yScaleOptions(ForecastType.Price),
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suggestedMin: 0,
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max: this.yMax(this.gridSlots),
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},
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},
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};
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},
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selectedSlot() {
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if (this.selectedIndex === null || !this.selected) return null;
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const slotMap = {
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[ForecastType.Solar]: this.solarEntries,
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[ForecastType.Price]: this.gridSlots,
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[ForecastType.Co2]: this.co2Slots,
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};
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return slotMap[this.selected]?.[this.selectedIndex] ?? null;
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},
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},
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watch: {
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selectedSlot(slot) {
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this.$emit("selected", slot);
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},
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},
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mounted() {
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this.interval = setTimeout(() => {
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this.updateStartDate();
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}, 1000 * 60);
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this.updateStartDate();
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setTimeout(() => {
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this.animations = true;
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}, 1000);
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},
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beforeUnmount() {
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if (this.interval) {
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clearTimeout(this.interval);
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}
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},
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methods: {
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updateStartDate() {
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const now = new Date();
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now.setMinutes(0);
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now.setSeconds(0);
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now.setMilliseconds(0);
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this.startDate = now;
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},
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filterSlots(slots: ForecastSlot[] = []) {
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if (!slots) {
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return undefined;
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}
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return slots.filter(
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(slot) =>
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new Date(slot.end) >= this.startDate && new Date(slot.start) <= this.endDate
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);
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},
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filterEntries(entries: TimeseriesEntry[] = []) {
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return entries.filter(
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(entry) =>
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new Date(entry.ts) >= this.startDate && new Date(entry.ts) <= this.endDate
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);
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},
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onMouseLeave() {
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this.selectIndex(null, true);
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},
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selectIndex(index: number | null, timeout = false) {
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if (this.ignoreEvents) return;
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this.selectedIndex = index;
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// reset hover state (points, highlights)
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if (this.selectedIndex === null) {
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this.$nextTick(() => {
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// @ts-expect-error unknown chart type
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this.$refs.chart?.chart?.setActiveElements([]);
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});
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}
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// ignore events after selection reset because chart.js triggers delayed mousemove events
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if (timeout) {
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this.ignoreEvents = true;
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this.ignoreEventsTimeout = setTimeout(() => {
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this.ignoreEvents = false;
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}, 100);
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}
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},
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yMax(slots: ForecastSlot[] = []): number | undefined {
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const max = this.maxValue(slots);
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if (!max) return undefined;
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const fixedValues = slots.every((slot) => slot.value === max);
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// add space to the top of the scale; shrink fixed-value datasets, they are not interesting and should not dominate the chart
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const topSpace = fixedValues ? 3 : 1.15;
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return max * topSpace;
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},
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yMaxEntry(entries: TimeseriesEntry[] = [], scale: number = 1): number | undefined {
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const maxValue = this.maxEntryValue(entries);
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if (!maxValue) return undefined;
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// use scale and unscaled to determine max scale
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return Math.max(maxValue * scale, maxValue) * 1.15;
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},
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maxIndex(slots: ForecastSlot[] = []) {
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return slots.reduce((max, slot, index) => {
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return slot.value > (slots[max]?.value || 0) ? index : max;
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}, 0);
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},
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minIndex(slots: ForecastSlot[] = []) {
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return slots.reduce((min, slot, index) => {
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return slot.value < (slots[min]?.value || 0) ? index : min;
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}, 0);
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},
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maxValue(slots: ForecastSlot[] = []) {
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return slots[this.maxIndex(slots)]?.value || null;
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},
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maxEntryValue(entries: TimeseriesEntry[] = []) {
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return entries[this.maxEntryIndex(entries)]?.val || null;
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},
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maxEntryIndex(entries: TimeseriesEntry[] = []) {
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return entries.reduce((max, entry, index) => {
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return entry.val > (entries[max]?.val || 0) ? index : max;
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}, 0);
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},
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yScaleOptions(type: ForecastType) {
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return type === this.selected
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? {
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display: true,
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ticks: { display: false },
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border: { display: false },
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grid: {
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display: true,
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color: colors.border,
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// @ts-expect-error no-explicit-any
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lineWidth: (context) => {
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return context.tick?.value === 0 ? 1 : 0;
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},
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},
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}
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: { display: false };
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},
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},
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});
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</script>
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