71 lines
2.6 KiB
JavaScript
71 lines
2.6 KiB
JavaScript
/* coin_info.js */
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(function() {
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// Reads and validates settings from storage.
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function readSettings() {
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const storage = require("Storage");
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let settings = storage.readJSON("coin_info.settings.json", 1) || {};
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if (!(settings.tokenSelected instanceof Array)) {
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settings.tokenSelected = [];
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}
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return settings;
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}
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// Returns the display content for a given token.
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function getCoinInfo(token) {
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return {
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text: token,
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// Decodes the base-64 image that will be shown.
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img: atob("MDCBAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD/AAAAAA//8AAAAB///AAAAB8A/gAAAAgAH4AAAwAAB8AAB4AAA+AADwA4APAADgA4APAAHgA4AHgADAf/ADwAAAf/gBwAAAf/wB4AAAcB4A4AAAcA4A4AAAcA4A4AYAcA4AcA8AcB4AcB+Af/wDdj/Af/4D/n/Af/8D/n/AcAcB/A4AcAOA+A4AcAOAcAcAcAOAAAcAcAAAAAcAcAAAAAeAf/AAAAOAf/AAAAPAf/ADAAHgA4AHgADwA4AHAADwA4APAAB8AAA+AAA+AAB8AAAfgAH4AAAH8A/gAAAD///AAAAA//8AAAAAD/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==")
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};
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}
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// Starts the redraw timer for a clock info item.
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// The timer is set so that the first redraw happens at the beginning of the next minute,
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// and then continues with an interval of 60,000ms (1 minute).
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function showCoinInfo() {
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var self = this;
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self.interval = setTimeout(function timerTimeout() {
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self.emit("redraw");
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self.interval = setInterval(function intervalCallback() {
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self.emit("redraw");
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}, 60000);
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}, 60000 - (Date.now() % 60000));
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}
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// Stops the redraw timer.
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function hideCoinInfo() {
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if (this.interval) {
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clearInterval(this.interval);
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this.interval = null;
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}
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}
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// Creates a single clock info item for a given token.
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function createCoinInfoItem(token) {
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return {
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name: token,
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get: function() {
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return getCoinInfo(token);
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},
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show: showCoinInfo,
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hide: hideCoinInfo,
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hasRange: false,
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};
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}
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// Reads the stored tokens and creates clock info items for them.
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function createCoinInfoModule() {
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const settings = readSettings();
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const items = settings.tokenSelected.map(createCoinInfoItem);
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return {
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name: "CoinInfo",
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items: items,
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};
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}
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// Return the exported object (the module) from the IIFE.
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// Using this pattern ensures compatibility with the Espruino environment
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// on Bangle.js instead of Node.js-style module.exports.
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return createCoinInfoModule();
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})();
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