Removed unnecessary compression step

The logic for returning default data is now in
the `catch` part of the `readFileAsync` promise, so that
new games don't trigger unnecessary compression and then
decompression of the default data.

src/js/core/read_write_proxy.js

@@ -165,19 +165,6 @@ export class ReadWriteProxy {
     return (
       this.app.storage
         .readFileAsync(this.filename)
-
-                // Check for errors during read
-                .catch(err => {
-                    if (err === FILE_NOT_FOUND) {
-                        logger.log("File not found, using default data");
-
-                        // File not found or unreadable, assume default file
-                        return Promise.resolve(null);
-                    }
-
-                    return Promise.reject("file-error: " + err);
-                })
-
         // Decrypt data (if its encrypted)
         // @ts-ignore
         .then(rawData => {
@@ -211,19 +198,10 @@ export class ReadWriteProxy {
                 "bad-content / checksum-mismatch: " + desiredChecksum + " vs " + checksum
               );
             }
-                        return jsonString;
-                    } else {
-                        if (!G_IS_DEV) {
-                            return Promise.reject("bad-content / missing-compression");
-                        }
-                    }
-                    return rawData;
-                })
 
-                // Parse JSON, this could throw but that's fine
+            // Parse JSON
-                .then(res => {
             try {
-                        return JSON.parse(res);
+              return JSON.parse(jsonString);
             } catch (ex) {
               logger.error(
                 "Failed to parse file content of",
@@ -231,15 +209,34 @@ export class ReadWriteProxy {
                 ":",
                 ex,
                 "(content was:",
-                            res,
+                jsonString,
                 ")"
               );
               throw new Error("invalid-serialized-data");
             }
+
+          }
+
+          if (!G_IS_DEV) {
+            return Promise.reject("bad-content / missing-compression");
+          }
+          return rawData;
+        })
+        // Check for errors during read
+        .catch(err => {
+          if (err === FILE_NOT_FOUND) {
+            logger.log("File not found, using default data");
+
+            // File not found or unreadable, assume default file
+            return Promise.resolve(this.getDefaultData());
+          }
+
+          return Promise.reject("file-error: " + err);
         })
 
+
         // Decompress
-                .then(compressed => decompressObject(compressed))
+        .then(decompressObject)
 
         // Verify basic structure
         .then(contents => {