Merge pull request #75 from MichalPawlicki/DPR-522-support-sb1

Support SB1 project files

Author: MichalPawlicki

lib/index.js

@@ -1,11 +1,16 @@
 const parser = require('scratch-parser');
 
+const {SB1Analyzer} = require('./sb1');
 const sb2 = require('./sb2');
 const sb3 = require('./sb3');
 
 module.exports = function (buffer, callback) {
     parser(buffer, false, (err, result) => {
-        if (err) return callback(err);
+        if (err === 'Parser only supports Scratch 2.X and above') {
+            return new SB1Analyzer().analyze(buffer, callback);
+        } else if (err) {
+            return callback(err);
+        }
 
         // Extract the project object from the parser results
         const project = result[0];

lib/sb1.js

@@ -0,0 +1,46 @@
+const scratchParserValidate = require('scratch-parser/lib/validate');
+const {SB1File} = require('scratch-sb1-converter');
+
+const sb2 = require('./sb2');
+
+/**
+ * SB1Analyzer class for analyzing SB1 projects.
+ */
+class SB1Analyzer {
+    /**
+     * Creates a new SB1Analyzer instance.
+     * @param {Function} validate - The validate function to use.
+     */
+    constructor (validate = scratchParserValidate) {
+        this.validate = validate;
+    }
+
+    /**
+     * Converts an SB1 project buffer to an SB2 project object,
+     * validates it using the provided validate function,
+     * analyzes it, and returns summary information about the project.
+     * @param  {Buffer}   buffer  Project buffer (SB1 format)
+     * @param  {Function} callback Callback function
+     * @return {void}
+     */
+    analyze (buffer, callback) {
+        try {
+            const sb1File = new SB1File(buffer);
+            const project = sb1File.json;
+
+            this.validate(false, project, (err, validatedProject) => {
+                if (err) {
+                    return callback(err);
+                }
+
+                validatedProject.isBundle = true;
+                validatedProject.projectVersion = 1;
+                return sb2(validatedProject, callback);
+            });
+        } catch (err) {
+            return callback(err);
+        }
+    }
+}
+
+module.exports = {SB1Analyzer};

lib/sb2.js

@@ -247,7 +247,7 @@ module.exports = function (project, callback) {
         comments: extract(project, 'scriptComments'),
         sounds: extract(project, 'sounds', 'soundName', 'md5'),
         costumes: extract(project, 'costumes', 'costumeName', 'baseLayerMD5'),
-        projectVersion: 2,
+        projectVersion: project.projectVersion,
         isBundle: project.isBundle
     };
 

lib/sb3.js

@@ -191,7 +191,7 @@ module.exports = function (project, callback) {
         blocks: blocks(project.targets),
         extensions: extensions(project.extensions),
         meta: metadata(project.meta),
-        projectVersion: 3,
+        projectVersion: project.projectVersion,
         isBundle: project.isBundle
     };
 

package-lock.json

@@ -15,7 +15,8 @@
   "author": "Scratch Foundation",
   "license": "BSD-3-Clause",
   "dependencies": {
-    "scratch-parser": "5.0.0"
+    "scratch-parser": "5.0.0",
+    "scratch-sb1-converter": "2.0.50"
   },
   "devDependencies": {
     "@babel/eslint-parser": "^7.5.4",