Use @turbowarp/json to parse non-standards-compliant Scratch 2 projects

lib/parse.js

@@ -1,3 +1,5 @@
+const ExtendedJSON = require('@turbowarp/json');
+
 /**
  * Converts string from unpack method into a project object. Note: this method
  * will be expanded greatly in the future in order to support the Scratch 1.4
@@ -16,7 +18,7 @@ module.exports = function (input, callback) {
         // so remove that specific one before continuing.
         // SB2 JSONs and SB3 JSONs have different versions of the
         // character serialized (e.g. \u0008 and \b), strip out both versions
-        result = JSON.parse(input.replace(
+        result = ExtendedJSON.parse(input.replace(
             /(\\+)(b|u0008)/g,
             (match, backslash, code) => {
                 // If the number is odd, there is an actual backspace.

package.json

@@ -20,6 +20,7 @@
     "semantic-release": "semantic-release"
   },
   "dependencies": {
+    "@turbowarp/json": "^0.1.1",
     "ajv": "6.3.0",
     "jszip": "3.1.5",
     "pify": "4.0.1"

test/unit/parser.js

@@ -85,3 +85,31 @@ test('backslashes followed by b are not stripped at all', function (t) {
         t.end();
     });
 });
+
+test('supports non-standard Scratch 2 JSON', (t) => {
+    const json = `
+    {
+        // This is a line comment
+        /* This is
+                    a block comment */
+        "something": [
+            Infinity,
+            -Infinity,
+            // Trailing comma should be ignored
+            NaN,
+        ]
+    }
+    This is some extra garbage at the end that should be ignored.
+    `;
+    parse(json, (err, res) => {
+        t.equal(err, null);
+        t.same(res, {
+            something: [
+                Infinity,
+                -Infinity,
+                NaN
+            ]
+        });
+        t.end();
+    });
+});