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devstopwatch - persist state to storage

master
Fergal Walsh 2021-01-13 16:24:56 +00:00
parent 57f2bd7f0c
commit 59c07b9491
1 changed files with 40 additions and 27 deletions
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67
apps/devstopwatch/app.js
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@ -9,21 +9,25 @@ const Y_BTN3 = 225;
const FONT = '6x8'; const FONT = '6x8';
const CHRONO = '/* C H R O N O */'; const CHRONO = '/* C H R O N O */';
var laps = [EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP];
var started = false;
var reset = false; var reset = false;
var whenStarted;
var whenStartedTotal;
var currentLapIndex = 1;
var currentLap = ''; var currentLap = '';
var chronoInterval; var chronoInterval;
// Read state from storage or create default state if it doesn't exist
var state = require("Storage").readJSON("devstopwatch.state.json",1) || {
started: false,
whenStarted: null,
whenStartedTotal: null,
currentLapIndex: 1,
laps: [EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP],
};
// Set laps. // Set laps.
setWatch(() => { setWatch(() => {
reset = false; reset = false;
if (started) { if (state.started) {
changeLap(); changeLap();
} else { } else {
if (!reset) { if (!reset) {
@ -39,10 +43,10 @@ setWatch(() => { resetChrono(); }, BTN3, { repeat: true, edge: 'rising' });
setWatch(Bangle.showLauncher, BTN2, { repeat: false, edge: 'falling' }); setWatch(Bangle.showLauncher, BTN2, { repeat: false, edge: 'falling' });
function resetChrono() { function resetChrono() {
laps = [EMPTY_H, EMPTY_H, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP]; state.laps = [EMPTY_H, EMPTY_H, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP, EMPTY_LAP];
started = false; state.started = false;
reset = true; reset = true;
currentLapIndex = 1; state.currentLapIndex = 1;
currentLap = ''; currentLap = '';
if (chronoInterval !== undefined) { if (chronoInterval !== undefined) {
@ -54,32 +58,32 @@ function resetChrono() {
function chronometer() { function chronometer() {
if (!started) { if (!state.started) {
var rightNow = Date.now(); var rightNow = Date.now();
whenStarted = rightNow; state.whenStarted = rightNow;
whenStartedTotal = rightNow; state.whenStartedTotal = rightNow;
started = true; state.started = true;
reset = false; reset = false;
} }
currentLap = calculateLap(whenStarted); currentLap = calculateLap(state.whenStarted);
total = calculateLap(whenStartedTotal); total = calculateLap(state.whenStartedTotal);
laps[0] = total; state.laps[0] = total;
laps[1] = currentLap; state.laps[1] = currentLap;
printChrono(); printChrono();
} }
function changeLap() { function changeLap() {
currentLapIndex++; state.currentLapIndex++;
if ((currentLapIndex) > MAX_LAPS) { if ((state.currentLapIndex) > MAX_LAPS) {
currentLapIndex = 2; state.currentLapIndex = 2;
} }
laps[currentLapIndex] = currentLap; state.laps[state.currentLapIndex] = currentLap;
whenStarted = Date.now(); state.whenStarted = Date.now();
} }
function calculateLap(whenStarted) { function calculateLap(whenStarted) {
@ -108,8 +112,8 @@ function printChrono() {
g.setColor(0, 220, 0); g.setColor(0, 220, 0);
g.setFont(FONT, 3); g.setFont(FONT, 3);
print = ` T ${laps[0]}\n`; print = ` T ${state.laps[0]}\n`;
print += ` C ${laps[1]}\n`; print += ` C ${state.laps[1]}\n`;
g.drawString(print, XY_CENTER, Y_HEADER, true); g.drawString(print, XY_CENTER, Y_HEADER, true);
g.setColor(255, 255, 255); g.setColor(255, 255, 255);
@ -119,12 +123,12 @@ function printChrono() {
g.setColor(255, 255, 255); g.setColor(255, 255, 255);
let suffix = ' '; let suffix = ' ';
if (currentLapIndex === i) { if (state.currentLapIndex === i) {
let suffix = '*'; let suffix = '*';
g.setColor(255, 200, 0); g.setColor(255, 200, 0);
} }
const lapLine = `L${i - 1} ${laps[i]} ${suffix}\n`; const lapLine = `L${i - 1} ${state.laps[i]} ${suffix}\n`;
g.drawString(lapLine, XY_CENTER, Y_LAPS + (15 * (i - 1)), true); g.drawString(lapLine, XY_CENTER, Y_LAPS + (15 * (i - 1)), true);
} }
@ -156,4 +160,13 @@ g.clear();
Bangle.loadWidgets(); Bangle.loadWidgets();
Bangle.drawWidgets(); Bangle.drawWidgets();
resetChrono(); // Write the current state to storage
E.on('kill', function(){
require("Storage").writeJSON("devstopwatch.state.json", state);
});
if(state.started){
chronoInterval = setInterval(chronometer, 10);
} else {
resetChrono();
}