use new well.isOccupied() functions in example code

Author: Jonahss

examples/memory/index.js

@@ -2,11 +2,16 @@ let fs = require('fs/promises')
 let path = require('path')
 let { createCanvas } = require('canvas');
 
-let { Plinth } = require('@wyldcard/drivers')
+let { Plinth, CardNotPresentError } = require('@wyldcard/drivers')
 
 // return the button press callback, associated with a well and button
 function buttonPress(well) {
   return async (chordedButtonPressEvent) => {
+    // do nothing if no card present
+    if (!well.isOccupied()) {
+      return
+    }
+
     memoryTemplate = {
       buttonPresses: [[],[],[],[],[]],
       count: 0,
@@ -104,8 +109,10 @@ function eraseAll(plinth) {
   let pixelsFormattedForWyldcard = formatPixelBuffer(pixels)
 
   plinth.wells.forEach((well) => {
-    well.storeData({})
-    well.displayImage(pixelsFormattedForWyldcard)
+    if (well.isOccupied()) {
+      well.storeData({})
+      well.displayImage(pixelsFormattedForWyldcard)
+    }
   })
 }
 

examples/simple-demo/index.js

@@ -28,4 +28,11 @@ async function main() {
   })
 }
 
-main()
+main()
+
+
+
+// catch all exceptions for this demo
+process.on('uncaughtException', (err) => {
+  console.error(err);
+})

examples/simple-demo/package-lock.json

@@ -37,6 +37,8 @@ async function main() {
   }
 
   let turnFacedown = async (well) => {
+    if (!well.isOccupied()) { return }
+    
     well.storeData({ tarotCard: 'facedown' })
 
     let cardBackPath = path.resolve('/', 'home', 'pi', 'Pictures', 'wyldcard', 'tarot-reliberate', 'back.png')
@@ -46,6 +48,8 @@ async function main() {
   }
 
   let turnFaceup = async (well) => {
+    if (!well.isOccupied()) { return }
+
     well.storeData({ tarotCard: 'faceup' })
 
     let imagePath = await drawCard()
@@ -79,6 +83,8 @@ async function main() {
 
   // returns a button-press callback
   let flipCard = (well) => {
+    if (!well.isOccupied()) { return }
+
     let memory;
 
     try {