Don't crash if preferences are not defined... (#23)

* Update big_bg_status.js

Don't crash if wearOLEDevenly is missing from preferences.json.

* Update status.js

Don't crash if wearOLEDevenly is missing from preferences.json

* Update index.js

Don't crash if status_screen is missing from preferences.json

Author: cluckj

index.js

@@ -51,9 +51,9 @@ socketServer
   fs.readFile(openapsDir+'/preferences.json', function (err, data) {
     if (err) throw err;
     preferences = JSON.parse(data);
-    if (preferences.status_screen == "bigbgstatus") {
+    if (preferences.status_screen && preferences.status_screen == "bigbgstatus") {
       bigBGStatus(display, openapsDir);
-    } else if (preferences.status_screen == "off") {
+    } else if (preferences.status_screen && preferences.status_screen == "off") {
       //don't auto-update the screen if it's turned off
     } else {
       graphStatus(display, openapsDir); //default to graph status

scripts/big_bg_status.js

@@ -145,13 +145,13 @@ display.oled.update(); // write buffer to the screen
 fs.readFile(openapsDir+"/preferences.json", function (err, data) {
   if (err) throw err;
   preferences = JSON.parse(data);
-  if (preferences.wearOLEDevenly.includes("off")) {
+  if (preferences.wearOLEDevenly && preferences.wearOLEDevenly.includes("off")) {
     display.oled.invertDisplay(false);
   }
-  else if (preferences.wearOLEDevenly.includes("nightandday") && (hour >= 20 || hour <= 8)) {
+  else if (preferences.wearOLEDevenly && preferences.wearOLEDevenly.includes("nightandday") && (hour >= 20 || hour <= 8)) {
     display.oled.invertDisplay(false);
   }
-  else if (preferences.wearOLEDevenly.includes("nightandday") && (hour <= 20 && hour >= 8)) {
+  else if (preferences.wearOLEDevenly && preferences.wearOLEDevenly.includes("nightandday") && (hour <= 20 && hour >= 8)) {
     display.oled.invertDisplay(true);
   }
   else {

scripts/status.js

@@ -232,13 +232,13 @@ display.oled.update(); //write buffer to the screen
 fs.readFile(openapsDir+"/preferences.json", function (err, data) {
   if (err) throw err;
   preferences = JSON.parse(data);
-  if (preferences.wearOLEDevenly.includes("off")) {
+  if (preferences.wearOLEDevenly && preferences.wearOLEDevenly.includes("off")) {
     display.oled.invertDisplay(false);
   }
-  else if (preferences.wearOLEDevenly.includes("nightandday") && (clockHour >= 20 || clockHour <= 8)) {
+  else if (preferences.wearOLEDevenly && preferences.wearOLEDevenly.includes("nightandday") && (clockHour >= 20 || clockHour <= 8)) {
     display.oled.invertDisplay(false);
   }
-  else if (preferences.wearOLEDevenly.includes("nightandday") && (clockHour <= 20 && clockHour >= 8)) {
+  else if (preferences.wearOLEDevenly && preferences.wearOLEDevenly.includes("nightandday") && (clockHour <= 20 && clockHour >= 8)) {
     display.oled.invertDisplay(true);
   }
   else {