Start the process of splitting JS files

I am a JS noob so this is probably poorly thought out. But it is a wip and I dont really care about the quality, just more the learning experience.

src/datum.js

@@ -0,0 +1,22 @@
+export default class Datum {
+    constructor(time, price) {
+        this._time = time;
+        this._price = price;
+    }
+
+    getTime() {
+        return this._time;
+    }
+
+    getPrice() {
+        return this._price;
+    }
+
+    getX() {
+        return this.getTime();
+    }
+
+    getY() {
+        return this.getPrice();
+    }
+}

src/fetchCurrent.js

@@ -0,0 +1,4 @@
+export default async function fetchCurrent() {
+    const resp = await fetch("https://data.wowtoken.app/token/current.json");
+    return await resp.json();
+}

src/fetchData.js

@@ -0,0 +1,13 @@
+import Datum from "./datum";
+import urlBuilder from "./urlBuilder";
+
+export default async function fetchData(currentRegionSelection, currentTimeSelection, currentAggregateSelection) {
+    const data = [];
+    const resp = await fetch(urlBuilder(currentRegionSelection, currentTimeSelection, currentAggregateSelection));
+    const respData = await resp.json();
+    for (let i = 0, l = respData.length; i < l; i++) {
+        let datum = new Datum(Date.parse(respData[i]['time']), respData[i]['value']);
+        data.push(datum);
+    }
+    return data;
+}

src/index.js

@@ -12,6 +12,12 @@ import {
 import 'chartjs-adapter-dayjs-3';
 import "./style.css"
 
+import fetchCurrent from "./fetchCurrent";
+import fetchData from "./fetchData";
+import {addLoader, removeLoader} from "./loader";
+import TokenChart from "./tokenChart";
+import Datum from "./datum";
+
 // TODO: This file should be seperated into multiple with better ownership
 
 Chart.register(
@@ -29,13 +35,14 @@ let currentRegionSelection = '';
 let currentTimeSelection = '';
 let currentAggregateSelection = '';
 let startYAtZero = false;
+let chart;
 const currentPriceHash = {
     us: 0,
     eu: 0,
     kr: 0,
     tw: 0
 };
-let chartData = {
+const chartData = {
     us: [],
     eu: [],
     kr: [],
@@ -68,7 +75,7 @@ function populateChart() {
             datasets: [{
                 borderColor: 'gold',
                 label: currentRegionSelection.toUpperCase() + " WoW Token Price",
-                data: chartJsData,
+                data: [],
                 cubicInterpolationMode: 'monotone',
                 pointRadius: 0
             }]
@@ -122,42 +129,35 @@ function lookupTimeUnit(query){
     return lookup[query.charAt(query.length - 1)]
 }
 
-
 async function callUpdateURL() {
-    let resp = await fetch("https://data.wowtoken.app/token/current.json");
+    await updateTokens(await fetchCurrent());
-    let data = await resp.json();
-    updateTokens(data);
 }
 
-function updateTokens(data) {
+async function updateTokens(data) {
-    updateRegionalToken('us', data);
+    await Promise.all([
-    updateRegionalToken('eu', data);
+        updateRegionalToken('us', data),
-    updateRegionalToken('kr', data);
+        updateRegionalToken('eu', data),
-    updateRegionalToken('tw', data);
+        updateRegionalToken('kr', data),
+        updateRegionalToken('tw', data)
+    ]);
 }
 
-function updateRegionalToken(region, data) {
+async function updateRegionalToken(region, data) {
     if (currentPriceHash[region] !== data['price_data'][region]) {
         currentPriceHash[region] = data['price_data'][region];
         if (region === currentRegionSelection) {
             formatToken();
-            if (currentAggregateSelection === 'none') {
+            const datum = new Datum(data['current_time'], data['price']);
-                addDataToChart(region, data);
+            if (currentAggregateSelection === 'none' && chart.active()) {
+                await chart.addDataToChart(datum);
+            }
+            else if (currentAggregateSelection === 'none' && !chart.active()) {
+                await chart.lateUpdate(datum);
             }
         }
     }
 }
 
-function addDataToChart(region, data) {
-    if (tokenChart) {
-        const datum = {x: data['current_time'], y: data['price_data'][region]}
-        tokenChart.data.datasets.forEach((dataset) => {
-            dataset.data.push(datum);
-        })
-        tokenChart.update();
-    }
-}
-
 async function aggregateFunctionToggle() {
     // TODO: We should probably make these global or something
     //  so if the need to be updated in the future we can do so easily
@@ -177,54 +177,33 @@ async function aggregateFunctionToggle() {
     }
 }
 
-function addLoader() {
+async function updateRegionPreference(newRegion) {
-    let loader = document.getElementById('loader');
-    if (!loader) {
-        const blank_div = document.createElement('div');
-        let loaderNode = blank_div.cloneNode();
-        loaderNode.id = 'loader';
-        loaderNode.className = 'lds-ripple';
-        loaderNode.appendChild(blank_div.cloneNode());
-        loaderNode.appendChild(blank_div.cloneNode());
-        let chartNode = document.getElementById('token-chart');
-        chartNode.before(loaderNode);
-    }
-}
-
-function removeLoader () {
-    let loader = document.getElementById('loader');
-    if (loader) {
-        loader.remove();
-    }
-}
-
-function updateRegionPreference(newRegion) {
     if (newRegion !== currentRegionSelection) {
-        tokenChart.destroy();
+        await chart.destroyChart();
         addLoader();
         currentRegionSelection = newRegion;
     }
     formatToken();
-    pullChartData().then(populateChart);
+    await pullChartData();
 }
 
-function updateTimePreference(newTime) {
+async function updateTimePreference(newTime) {
     if (newTime !== currentTimeSelection) {
-        tokenChart.destroy();
+        await chart.destroyChart();
         addLoader();
         currentTimeSelection = newTime;
-        aggregateFunctionToggle();
+        await aggregateFunctionToggle();
     }
-    pullChartData().then(populateChart);
+    await pullChartData();
 }
 
-function updateAggregatePreference(newAggregate) {
+async function updateAggregatePreference(newAggregate) {
     if (newAggregate !== currentAggregateSelection) {
-        tokenChart.destroy();
+        await chart.destroyChart();
         addLoader();
         currentAggregateSelection = newAggregate;
     }
-    pullChartData().then(populateChart);
+    await pullChartData();
 }
 
 function toggleAdvancedSetting() {
@@ -241,33 +220,19 @@ function toggleAdvancedSetting() {
 
 function toggleStartYAtZero(){
     startYAtZero = document.getElementById('y-start').checked;
-    if (tokenChart){
+    chart.toggleYStart(startYAtZero);
-        tokenChart.options.scales.y.beginAtZero = startYAtZero;
-        tokenChart.update();
-    }
-}
-
-function urlBuilder() {
-    let url = "https://data.wowtoken.app/token/history/";
-    if (currentAggregateSelection !== 'none') {
-        url += `${currentAggregateSelection}/`
-    }
-    url += `${currentRegionSelection}/${currentTimeSelection}.json`
-    return url;
 }
 
 async function pullChartData() {
-    let resp = await fetch(urlBuilder());
+    chartData[currentRegionSelection] = await fetchData(currentRegionSelection, currentTimeSelection, currentAggregateSelection);
-    let chartData = await resp.json();
+    if (!chart.active()) {
-    let newChartJSData = [];
+        await chart.createChart(currentRegionSelection, currentTimeSelection, startYAtZero, chartData[currentRegionSelection]);
-    for (let i = 0; i < chartData.length; i++) {
+    }
-        let datum = {
+    else {
-            x: chartData[i]['time'],
+        for (let i = 0; i < chartData[currentRegionSelection].length; i++) {
-            y: chartData[i]['value']
+            await chart.addDataToChart(chartData[currentRegionSelection][i]);
-        };
+        }
-        newChartJSData.push(datum);
     }
-    chartJsData = newChartJSData;
     removeLoader();
 }
 
@@ -428,7 +393,11 @@ function registerOptionHandlers() {
 document.addEventListener('DOMContentLoaded', function () {
     registerEventHandles();
     detectURLQuery();
-    Promise.all([callUpdateURL(), pullChartData()]).then(populateChart)
+    chart = new TokenChart();
+    Promise.all([
+        callUpdateURL(),
+    ]).then(pullChartData);
+
     setInterval(callUpdateURL, 60*1000);
 }, false);
 

src/loader.js

@@ -0,0 +1,22 @@
+function addLoader() {
+    let loader = document.getElementById('loader');
+    if (!loader) {
+        const blank_div = document.createElement('div');
+        let loaderNode = blank_div.cloneNode();
+        loaderNode.id = 'loader';
+        loaderNode.className = 'lds-ripple';
+        loaderNode.appendChild(blank_div.cloneNode());
+        loaderNode.appendChild(blank_div.cloneNode());
+        let chartNode = document.getElementById('token-chart');
+        chartNode.before(loaderNode);
+    }
+}
+
+function removeLoader () {
+    let loader = document.getElementById('loader');
+    if (loader) {
+        loader.remove();
+    }
+}
+
+export {addLoader, removeLoader};

src/tokenChart.js

@@ -0,0 +1,135 @@
+import {
+    Chart,
+    Legend,
+    LinearScale,
+    LineController,
+    LineElement,
+    PointElement,
+    TimeSeriesScale,
+    Title,
+    Tooltip
+} from 'chart.js';
+import 'chartjs-adapter-dayjs-3';
+
+function lookupTimeUnit(query){
+    const lookup = {
+        'h': 'day',
+        'd': 'week',
+        'm': 'month',
+        'y': 'month',
+        'l': 'year'
+    }
+    return lookup[query.charAt(query.length - 1)]
+}
+
+export default class TokenChart {
+    constructor() {
+        this._context = document.getElementById("token-chart").getContext('2d');
+        this._chartActive = false;
+        this._lastDatum = null;
+        this._lateUpdate = true
+    }
+
+    async createChart(region, time, yLevel, data = []) {
+        const chartData = [];
+        let lateUpdateData = this._lastDatum;
+
+        for (let i = 0; i < data.length; i++) {
+            this._lastDatum = data[i];
+            chartData.push({
+                x: data[i].getX(),
+                y: data[i].getY(),
+            })
+        }
+
+        if (this._lateUpdate) {
+            if (this._lastDatum.getPrice() !== lateUpdateData.getPrice() &&
+                this._lastDatum.getTime() < lateUpdateData.getTime()) {
+                chartData.push({
+                    x: lateUpdateData.getX(),
+                    y: lateUpdateData.getY(),
+                })
+            }
+            this._lateUpdate = false
+        }
+
+        this._chart = new Chart(this._context, {
+            type: 'line',
+            data: {
+                datasets: [{
+                    borderColor: 'gold',
+                    label: region.toUpperCase() + " WoW Token Price",
+                    data: chartData,
+                    cubicInterpolationMode: 'monotone',
+                    pointRadius: 0
+                }]
+            },
+            options: {
+                interaction: {
+                    intersect: false,
+                    mode: "index"
+                },
+                scales: {
+                    x: {
+                        type: 'time',
+                        grid: {
+                            color: '#625f62',
+                        },
+                        ticks: {
+                            color: '#a7a4ab',
+                            font: {
+                                size: 18,
+                            }
+                        },
+                        time: {
+                            unit: lookupTimeUnit(time)
+                        }
+                    },
+                    y: {
+                        beginAtZero: yLevel,
+                        grid: {
+                            color: '#2f2c2f',
+                        },
+                        ticks: {
+                            color: '#a7a4ab',
+                            font: {
+                                size: 18,
+                            }
+                        }
+                    }
+                },
+            }
+        });
+        this._chartActive = true;
+    }
+
+    async destroyChart() {
+        await this._chart.destroy();
+        this._chartActive = false;
+    }
+
+    async lateUpdate(datum){
+        this._lastDatum = datum;
+        this._lateUpdate = true;
+    }
+
+    async addDataToChart(datum) {
+        this._chart.data.datasets.forEach((dataset) => {
+            dataset.data.push({
+                x: datum.getX(),
+                y: datum.getY(),
+            })
+        });
+        this._chart.update();
+    }
+
+    active() {
+        return this._chartActive;
+    }
+
+    toggleYStart(startYAtZero) {
+        this._chart.options.scales.y.beginAtZero = startYAtZero;
+        this._chart.update();
+    }
+
+}

src/urlBuilder.js

@@ -0,0 +1,8 @@
+export default function urlBuilder(currentRegionSelection, currentTimeSelection, currentAggregateSelection) {
+    let url = "https://data.wowtoken.app/token/history/";
+    if (currentAggregateSelection !== 'none') {
+        url += `${currentAggregateSelection}/`
+    }
+    url += `${currentRegionSelection}/${currentTimeSelection}.json`
+    return url;
+}