swipeinv: read number of set apps correctly

Author: thyttan

apps/swipeinv/boot.js

@@ -4,19 +4,21 @@
     apps: []
   }, require("Storage").readJSON("swipeinv.json", true) || {});
 
-  let getAppIdFromSrc = ()=> { return global.__FILE__.split(".")[0]; }
+  let getAppIdFromSrc = ()=> {
+    return global.__FILE__ && global.__FILE__.split(".")[0];
+  }
 
   setTimeout(() => { // Timeout so we prepend listeners late, hopefully after all other listerners were added.
-    if (settings.global || settings.apps.length > 0) {
+    if (settings.global || Object.keys(settings.apps).length > 0) {
 
       let swipeInverter = (dirLR, dirUD, obj) => {
         if (settings.global ^ Object.keys(settings.apps).includes(getAppIdFromSrc())) {
           if (!(obj && obj.inverted)) {
             E.stopEventPropagation();
             obj = Object.assign({inverted:true}, obj);
 
-            if (settings.global ^ settings.apps[getAppIdFromSrc].swipeH) {dirLR *= -1;}
-            if (settings.global ^ settings.apps[getAppIdFromSrc].swipeV) {dirUD *= -1;}
+            if (settings.global ^ (settings.apps[getAppIdFromSrc()]&&settings.apps[getAppIdFromSrc()].swipeH)) {dirLR *= -1;}
+            if (settings.global ^ (settings.apps[getAppIdFromSrc()]&&settings.apps[getAppIdFromSrc()].swipeV)) {dirUD *= -1;}
 
             Bangle.emit("swipe", dirLR, dirUD, obj)
           }
@@ -29,8 +31,8 @@
             E.stopEventPropagation();
             e.inverted = true;
 
-            if (settings.global ^ settings.apps[getAppIdFromSrc].dragH) {e.dx *= -1;}
-            if (settings.global ^ settings.apps[getAppIdFromSrc].dragV) {e.dy *= -1;}
+            if (settings.global ^ (settings.apps[getAppIdFromSrc()]&&settings.apps[getAppIdFromSrc()].dragH)) {e.dx *= -1;}
+            if (settings.global ^ (settings.apps[getAppIdFromSrc()]&&settings.apps[getAppIdFromSrc()].dragV)) {e.dy *= -1;}
 
             Bangle.emit("drag", e);
           }