Android: import project in native

android/ScratchJr/app/src/main/java/org/scratchjr/android/DatabaseManager.java

@@ -1,6 +1,8 @@
 package org.scratchjr.android;
 
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
 import java.util.Locale;
 
 import org.json.JSONArray;
@@ -14,6 +16,7 @@ import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteDatabase.CursorFactory;
 import android.database.sqlite.SQLiteException;
 import android.database.sqlite.SQLiteOpenHelper;
+import android.text.TextUtils;
 import android.util.Log;
 
 /**
@@ -200,6 +203,27 @@ public class DatabaseManager {
         return Long.toString(id);
     }
 
+    public String insert(String table, JSONObject data) throws DatabaseException {
+        List<String> values = new ArrayList<>();
+        List<String> keys = new ArrayList<>();
+        List<String> placeholders = new ArrayList<>();
+        JSONArray names = data.names();
+        for (int i = 0; i < names.length(); i++) {
+            String key = names.optString(i);
+            keys.add(key);
+            placeholders.add("?");
+            values.add(data.optString(key));
+        }
+        String statement = String.format(
+            "INSERT INTO %s (%s) VALUES (%s)",
+            table,
+            TextUtils.join(",", keys),
+            TextUtils.join(",", placeholders)
+        );
+
+        return stmt(statement, values.toArray(new String[0]));
+    }
+
     private JSONObject getRowDataAsJsonObject(Cursor cursor)
         throws SQLiteException, JSONException
     {

android/ScratchJr/app/src/main/java/org/scratchjr/android/IOManager.java

@@ -8,12 +8,16 @@ import java.io.InputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 
 import org.json.JSONArray;
 import org.json.JSONException;
+import org.json.JSONObject;
 
 import android.content.Context;
+import android.net.Uri;
 import android.util.Base64;
 import android.util.Log;
 
@@ -272,4 +276,98 @@ public class IOManager {
         }
         return new String(hexChars);
     }
+
+    public void receiveProject(ScratchJrActivity activity, Uri uri) throws JSONException, IOException, DatabaseException {
+        File tempDir = new File(activity.getCacheDir() + File.separator + UUID.randomUUID().toString());
+        tempDir.mkdir();
+        List<String> entries = ScratchJrUtil.unzip(uri.getPath(), tempDir.getPath());
+        if (entries.isEmpty()) {
+            Log.e(LOG_TAG, "no entries found");
+            // no files
+            return;
+        }
+        // read project json
+        JSONObject json = ScratchJrUtil.readJson(tempDir + "/project/data.json");
+        JSONObject projectData = json.optJSONObject("json");
+        JSONObject projectJson = new JSONObject();
+        projectJson.put("isgift", "1");
+        projectJson.put("deleted", "NO");
+        projectJson.put("json", projectData.toString());
+        JSONObject thumbnail = json.optJSONObject("thumbnail");
+        projectJson.put("thumbnail", thumbnail.toString());
+        projectJson.put("version", "iOSv01");
+        projectJson.put("name", projectData.optString("name"));
+        _databaseManager.insert("projects", projectJson);
+
+        HashMap<String, JSONObject> spriteMap = new HashMap<>();
+        JSONArray pages = projectData.optJSONArray("pages");
+        for (int i = 0; i < pages.length(); i++) {
+            String pageName = pages.optString(i);
+            if (pageName == null) {
+                continue;
+            }
+            JSONObject page = projectData.optJSONObject(pageName);
+            JSONArray spriteNames = page.optJSONArray("sprites");
+            for (int j = 0; j < spriteNames.length(); j++) {
+                String spriteName = spriteNames.optString(j);
+                JSONObject sprite = page.optJSONObject(spriteName);
+                spriteMap.put(sprite.optString("md5"), sprite);
+            }
+        }
+        for (int i = 0; i < entries.size(); i++) {
+            String entry = entries.get(i);
+            if (entry == null) {
+                continue;
+            }
+            if (!(entry.endsWith(".png") || entry.endsWith(".wav") || entry.endsWith(".svg"))) {
+                continue;
+            }
+            // copy file to target file
+            File sourceFile = new File(tempDir + File.separator + entry);
+
+            String fileName = sourceFile.getName();
+            File targetFile = new File(activity.getFilesDir().getPath() + File.separator + fileName);
+            if (!targetFile.exists()) {
+                ScratchJrUtil.copyFile(sourceFile, targetFile);
+            }
+            String folderName = sourceFile.getParentFile().getName();
+            if ("thumbnails".equals(folderName) || "sounds".equals(folderName)) {
+                continue;
+            }
+            String table = "characters".equals(folderName) ? "usershapes" : "userbkgs";
+            String statement = String.format("SELECT id FROM %s WHERE md5 = ?", table);
+            JSONArray rows = _databaseManager.query(statement, new String[]{fileName});
+            if (rows.length() > 0) {
+                Log.e(LOG_TAG, "asset for " + fileName + "exists");
+                continue;
+            }
+            String pngName = fileName.replace(".svg", ".png");
+            JSONObject asset = new JSONObject();
+            asset.put("version", "iOSv01");
+            asset.put("md5", fileName);
+            asset.put("altmd5", pngName);
+            asset.put("width", "480");
+            asset.put("height", "360");
+            asset.put("ext", fileName.split("\\.")[1]);
+            if ("characters".equals(folderName)) {
+                JSONObject sprite = spriteMap.get(fileName);
+                if (sprite == null) {
+                    continue;
+                }
+                asset.put("width", sprite.optString("w"));
+                asset.put("height", sprite.optString("h"));
+                asset.put("scale", sprite.optString("scale"));
+                asset.put("name", sprite.optString("name"));
+            }
+            File png = new File(activity.getFilesDir().getPath() + File.separator + pngName);
+            if (!png.exists()) {
+                String js = String.format("ScratchJr.makeThumb('%s', %s, %s)", fileName, asset.optString("width"), asset.optString("height"));
+                Log.d(LOG_TAG, js);
+                activity.runJavaScript(js);
+            }
+            _databaseManager.insert(table, asset);
+        }
+        // refresh lobby
+        activity.runJavaScript("Lobby.refresh();");
+    }
 }

android/ScratchJr/app/src/main/java/org/scratchjr/android/ScratchJrActivity.java

@@ -17,7 +17,6 @@ import android.os.Handler;
 import androidx.annotation.NonNull;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
-import android.util.Base64;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.View;
@@ -36,10 +35,7 @@ import android.widget.RelativeLayout;
 
 import com.google.firebase.analytics.FirebaseAnalytics;
 
-import java.io.ByteArrayOutputStream;
+import java.util.ArrayList;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.InputStream;
 import java.util.Arrays;
 import java.util.Vector;
 
@@ -110,6 +106,11 @@ public class ScratchJrActivity
     /* Firebase analytics tracking */
     private FirebaseAnalytics _FirebaseAnalytics;
 
+    /**
+     * Project uri that need to be imported.
+     */
+    private ArrayList<Uri> projectUris = new ArrayList<>();
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -310,7 +311,15 @@ public class ScratchJrActivity
         }
     }
 
-    private void receiveProject(Uri projectUri) {
+    private void receiveProject(final Uri projectUri) {
+        if (!isSplashDone()) {
+            projectUris.add(projectUri);
+            return;
+        }
+        importProject(projectUri);
+    }
+
+    private void importProject(final Uri projectUri) {
         String PROJECT_EXTENSION = getApplicationContext().getString(R.string.share_extension_filter);
         String scheme = projectUri.getScheme();
         Log.i(LOG_TAG, "receiveProject(scheme): " + scheme);
@@ -324,25 +333,16 @@ public class ScratchJrActivity
         if (scheme.equals(ContentResolver.SCHEME_FILE) && !projectUri.getPath().matches(PROJECT_EXTENSION)) {
             return;
         }
-        // Read the project one byte at a time into a buffer
+        runOnUiThread(new Runnable() {
-        ByteArrayOutputStream projectData = new ByteArrayOutputStream();
+            @Override
+            public void run() {
                 try {
-            InputStream is = getContentResolver().openInputStream(projectUri);
+                    _ioManager.receiveProject(ScratchJrActivity.this, projectUri);
-
+                } catch (Exception e) {
-            byte[] readByte = new byte[1];
+                    e.printStackTrace();
-            while ((is.read(readByte)) == 1) {
-                projectData.write(readByte[0]);
                 }
-        } catch (FileNotFoundException e) {
-            Log.i(LOG_TAG, "File not found in project load");
-            return;
-        } catch (IOException e) {
-            Log.i(LOG_TAG, "IOException in project load");
-            return;
             }
-        // We send the project Base64-encoded to JavaScript where it's processed and unpacked
+        });
-        String base64Project = Base64.encodeToString(projectData.toByteArray(), Base64.DEFAULT);
-        runJavaScript("OS.loadProjectFromSjr('" + base64Project + "');");
     }
 
     public RelativeLayout getContainer() {
@@ -483,6 +483,10 @@ public class ScratchJrActivity
 
     public void setSplashDone(boolean done) {
         _splashDone = done;
+        while (projectUris.size() > 0) {
+            Uri uri = projectUris.remove(0);
+            importProject(uri);
+        }
     }
 
     /**

android/ScratchJr/app/src/main/java/org/scratchjr/android/ScratchJrUtil.java

@@ -2,16 +2,22 @@ package org.scratchjr.android;
 
 import org.json.JSONArray;
 import org.json.JSONException;
+import org.json.JSONObject;
 
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
 import java.util.zip.ZipOutputStream;
 
 /**
@@ -186,4 +192,77 @@ public class ScratchJrUtil {
         }
         return segments[segments.length - 1];
     }
+
+    public static List<String> unzip(String zipPath, String toPath) {
+        List<String> entries = new ArrayList<>();
+        File zipFile = new File(zipPath);
+        ZipInputStream zin;
+        try {
+            zin = new ZipInputStream(new FileInputStream(zipFile));
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+            return entries;
+        }
+        try {
+            ZipEntry ze;
+            while ((ze = zin.getNextEntry()) != null) {
+                String path = toPath + File.separator + ze.getName();
+                File unzipFile = new File(path);
+                if (ze.isDirectory()) {
+                    if(!unzipFile.isDirectory()) {
+                        unzipFile.mkdirs();
+                    }
+                    continue;
+                }
+                File folder = unzipFile.getParentFile();
+                if (!folder.isDirectory()) {
+                    folder.mkdirs();
+                }
+                FileOutputStream fout = new FileOutputStream(path, false);
+                BufferedOutputStream bout = new BufferedOutputStream(fout);
+                try {
+                    byte[] buffer = new byte[1024];
+                    int read;
+                    while ((read = zin.read(buffer)) != -1) {
+                        bout.write(buffer, 0, read);
+                    }
+                    bout.flush();
+                    zin.closeEntry();
+                    entries.add(ze.getName());
+                } catch (IOException e) {
+                    e.printStackTrace();
+                } finally {
+                    fout.close();
+                    bout.close();
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        try {
+            zin.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return entries;
+    }
+
+    public static JSONObject readJson(String path) throws IOException, JSONException {
+        byte[] data;
+        InputStream in = new FileInputStream(new File(path));
+
+        try {
+            ByteArrayOutputStream bos = new ByteArrayOutputStream();
+            int len;
+            byte[] buffer = new byte[1024];
+            while ((len = in.read(buffer)) != -1) {
+                bos.write(buffer, 0, len);
+            }
+            bos.close();
+            data = bos.toByteArray();
+        } finally {
+            in.close();
+        }
+        return new JSONObject(new String(data));
+    }
 }