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| 1 | +/* |
| 2 | + * Burn: Calories Counter for Bangle.js (Espruino). Based on the original Counter app. |
| 3 | + * Features: |
| 4 | + * - Persistent counter: saved to a file. |
| 5 | + * - Daily reset: counter resets each day. |
| 6 | + * - Adjustable increment value. |
| 7 | + * |
| 8 | + * Bangle.js 1 Controls: |
| 9 | + * - BTN1: Increase (or tap right) |
| 10 | + * - BTN3: Decrease (or tap left) |
| 11 | + * - Press BTN2: Change increment |
| 12 | + * |
| 13 | + * Bangle.js 2 Controls: |
| 14 | + * - Swipe up: Increase |
| 15 | + * - Swipe down: Decrease |
| 16 | + * - Press BTN: Change increment |
| 17 | + */ |
| 18 | + |
| 19 | +// File variable to handle file operations |
| 20 | +let file; |
| 21 | + |
| 22 | +// Check if the hardware version is Bangle.js 2 |
| 23 | +const BANGLEJS2 = process.env.HWVERSION == 2; |
| 24 | + |
| 25 | +// Importing the Storage module for file operations |
| 26 | +const Storage = require("Storage"); |
| 27 | + |
| 28 | +// File path for the counter data |
| 29 | +const PATH = "kcal.txt"; |
| 30 | + |
| 31 | +// Function to get the current date as a string |
| 32 | +function dayString() { |
| 33 | + const date = new Date(); |
| 34 | + // Month is 0-indexed, so we add 1 to get the correct month number |
| 35 | + return `${date.getMonth() + 1}-${date.getDate()}-${date.getFullYear()}`; |
| 36 | +} |
| 37 | + |
| 38 | +// Counter object to keep track of the count and the date |
| 39 | +let counter = { count: 0, date: dayString() }; |
| 40 | + |
| 41 | +// Function to read the counter from the file |
| 42 | +function readCounterFromFile() { |
| 43 | + try { |
| 44 | + // Open the file in read mode |
| 45 | + file = Storage.open(PATH, "r"); |
| 46 | + let line = file.readLine(); |
| 47 | + |
| 48 | + // If the file has content, parse it and update the counter |
| 49 | + if (line) { |
| 50 | + let splitLine = line.trim().split(","); |
| 51 | + counter = { count: parseInt(splitLine[0]), date: splitLine[1] }; |
| 52 | + } |
| 53 | + } catch (err) { |
| 54 | + // If the file does not exist, the counter will remain 0 |
| 55 | + } |
| 56 | +} |
| 57 | + |
| 58 | +// Function to write the counter to the file |
| 59 | +function writeCounterToFile() { |
| 60 | + // Open the file in write mode |
| 61 | + file = Storage.open(PATH, "w"); |
| 62 | + // Write the counter and date to the file |
| 63 | + file.write(counter.count.toString() + "," + counter.date + "\n"); |
| 64 | +} |
| 65 | + |
| 66 | +// Function to reset the counter |
| 67 | +function resetCounter() { |
| 68 | + // Reset the counter to 0 and update the date |
| 69 | + counter = { count: 0, date: dayString() }; |
| 70 | +} |
| 71 | + |
| 72 | +// Function to update the counter value |
| 73 | +function updateCounterValue(value) { |
| 74 | + // Update the counter with the new value, ensuring it's not less than 0 |
| 75 | + counter = { count: Math.max(0, value), date: dayString() }; |
| 76 | +} |
| 77 | + |
| 78 | +// Function to update the counter |
| 79 | +function updateCounter(value) { |
| 80 | + // If the date has changed, reset the counter |
| 81 | + if (counter.date != dayString()) { |
| 82 | + resetCounter(); |
| 83 | + } else { |
| 84 | + // Otherwise, update the counter value |
| 85 | + updateCounterValue(value); |
| 86 | + } |
| 87 | + |
| 88 | + // Write the updated counter to the file |
| 89 | + writeCounterToFile(); |
| 90 | + // Update the screen with the new counter value |
| 91 | + updateScreen(); |
| 92 | +} |
| 93 | + |
| 94 | +// Function to set a watch on a button to update the counter when pressed |
| 95 | +function counterButtonWatch(button, increment) { |
| 96 | + setWatch( |
| 97 | + () => { |
| 98 | + // If the button is for incrementing, or the counter is greater than 0, update the counter |
| 99 | + if (increment || counter.count > 0) { |
| 100 | + updateCounter( |
| 101 | + counter.count + (increment ? getInterval() : -getInterval()) |
| 102 | + ); |
| 103 | + // Update the screen with the new counter value |
| 104 | + updateScreen(); |
| 105 | + } |
| 106 | + }, |
| 107 | + button, |
| 108 | + { repeat: true } |
| 109 | + ); |
| 110 | +} |
| 111 | + |
| 112 | +// Function to create interval functions |
| 113 | +const createIntervalFunctions = function () { |
| 114 | + // Array of intervals |
| 115 | + const intervals = [50, 100, 200, 10]; |
| 116 | + // Current location in the intervals array |
| 117 | + let location = 0; |
| 118 | + |
| 119 | + // Function to get the current interval |
| 120 | + const getInterval = function () { |
| 121 | + return intervals[location]; |
| 122 | + }; |
| 123 | + |
| 124 | + // Function to rotate the increment |
| 125 | + const rotateIncrement = function () { |
| 126 | + // Update the location to the next index in the intervals array, wrapping around if necessary |
| 127 | + location = (location + 1) % intervals.length; |
| 128 | + // Update the screen with the new increment |
| 129 | + updateScreen(); |
| 130 | + }; |
| 131 | + |
| 132 | + // Return the getInterval and rotateIncrement functions |
| 133 | + return { getInterval, rotateIncrement }; |
| 134 | +}; |
| 135 | + |
| 136 | +// Create the interval functions |
| 137 | +const intervalFunctions = createIntervalFunctions(); |
| 138 | +const getInterval = intervalFunctions.getInterval; |
| 139 | +const rotateIncrement = intervalFunctions.rotateIncrement; |
| 140 | + |
| 141 | +// Function to update the screen |
| 142 | +function updateScreen() { |
| 143 | + // Clear the screen area for the counter |
| 144 | + g.clearRect(0, 50, 250, BANGLEJS2 ? 130 : 150) |
| 145 | + .setBgColor(g.theme.bg) |
| 146 | + .setColor(g.theme.fg) |
| 147 | + .setFont("Vector", 40) |
| 148 | + .setFontAlign(0, 0) |
| 149 | + // Draw the counter value |
| 150 | + .drawString(Math.floor(counter.count), g.getWidth() / 2, 100) |
| 151 | + .setFont("6x8") |
| 152 | + // Clear the screen area for the increment |
| 153 | + .clearRect(g.getWidth() / 2 - 50, 140, g.getWidth() / 2 + 50, 160) |
| 154 | + // Draw the increment value |
| 155 | + .drawString("Increment: " + getInterval(), g.getWidth() / 2, 150); |
| 156 | + |
| 157 | + // If the hardware version is Bangle.js 1, draw the increment and decrement buttons |
| 158 | + if (!BANGLEJS2) { |
| 159 | + g.drawString("-", 45, 100).drawString("+", 185, 100); |
| 160 | + } |
| 161 | +} |
| 162 | + |
| 163 | +// If the hardware version is Bangle.js 2, set up the drag handling and button watch |
| 164 | + |
| 165 | +let drag; |
| 166 | + |
| 167 | +if (BANGLEJS2) { |
| 168 | + // Set up drag handling |
| 169 | + Bangle.on("drag", (e) => { |
| 170 | + // If this is the start of a drag, record the initial coordinates |
| 171 | + if (!drag) { |
| 172 | + drag = { x: e.x, y: e.y }; |
| 173 | + return; |
| 174 | + } |
| 175 | + |
| 176 | + // If the button is still being pressed, ignore this event |
| 177 | + if (e.b) return; |
| 178 | + |
| 179 | + // Calculate the change in x and y from the start of the drag |
| 180 | + const dx = e.x - drag.x; |
| 181 | + const dy = e.y - drag.y; |
| 182 | + // Reset the drag start coordinates |
| 183 | + drag = null; |
| 184 | + |
| 185 | + // Determine if the drag is primarily horizontal or vertical |
| 186 | + const isHorizontalDrag = Math.abs(dx) > Math.abs(dy) + 10; |
| 187 | + const isVerticalDrag = Math.abs(dy) > Math.abs(dx) + 10; |
| 188 | + |
| 189 | + // If the drag is primarily horizontal, ignore it |
| 190 | + if (isHorizontalDrag) { |
| 191 | + return; |
| 192 | + } |
| 193 | + |
| 194 | + // If the drag is primarily vertical, update the counter |
| 195 | + if (isVerticalDrag) { |
| 196 | + // If the drag is downwards and the counter is greater than 0, decrease the counter |
| 197 | + if (dy > 0 && counter.count > 0) { |
| 198 | + updateCounter(counter.count - getInterval()); |
| 199 | + } else if (dy < 0) { |
| 200 | + // If the drag is upwards, increase the counter |
| 201 | + updateCounter(counter.count + getInterval()); |
| 202 | + } |
| 203 | + // Update the screen with the new counter value |
| 204 | + updateScreen(); |
| 205 | + } |
| 206 | + }); |
| 207 | + |
| 208 | + // Set a watch on the button to rotate the increment when pressed |
| 209 | + setWatch(rotateIncrement, BTN1, { repeat: true }); |
| 210 | +} else { |
| 211 | + // If the hardware version is Bangle.js 1, set up the button watches |
| 212 | + |
| 213 | + // Set watch on button to increase the counter |
| 214 | + counterButtonWatch(BTN1, true); |
| 215 | + counterButtonWatch(BTN5, true); // screen tap |
| 216 | + // Set watch on button to decrease the counter |
| 217 | + counterButtonWatch(BTN3, false); |
| 218 | + counterButtonWatch(BTN4, false); // screen tap |
| 219 | + |
| 220 | + // Set a watch on button to rotate the increment when pressed |
| 221 | + setWatch( |
| 222 | + () => { |
| 223 | + rotateIncrement(); |
| 224 | + }, |
| 225 | + BTN2, |
| 226 | + { repeat: true } |
| 227 | + ); |
| 228 | +} |
| 229 | + |
| 230 | +// clear the screen |
| 231 | +g.clear(); |
| 232 | + |
| 233 | +// Set the background and foreground colors |
| 234 | +g.setBgColor(g.theme.bg).setColor(g.theme.fg); |
| 235 | + |
| 236 | +// Load and draw the widgets |
| 237 | +Bangle.loadWidgets(); |
| 238 | +Bangle.drawWidgets(); |
| 239 | + |
| 240 | +// Read the counter from the file |
| 241 | +readCounterFromFile(); |
| 242 | +// Update the screen with the counter value |
| 243 | +updateScreen(); |
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