feat(op-sqlite): allow extensions to be loaded

Author: DominicGBauer

packages/powersync-op-sqlite/src/db/OPSqliteAdapter.ts

@@ -88,8 +88,9 @@ export class OPSQLiteDBAdapter extends BaseObserver<DBAdapterListener> implement
     const dbFilename = filenameOverride ?? this.options.name;
     const DB: DB = this.openDatabase(dbFilename, this.options.sqliteOptions.encryptionKey);
 
-    //Load extension for all connections
-    this.loadExtension(DB);
+    //Load extensions for all connections
+    this.loadAdditionalExtensions(DB);
+    this.loadPowerSyncExtension(DB);
 
     await DB.execute('SELECT powersync_init()');
 
@@ -124,7 +125,15 @@ export class OPSQLiteDBAdapter extends BaseObserver<DBAdapterListener> implement
     }
   }
 
-  private loadExtension(DB: DB) {
+  private loadAdditionalExtensions(DB: DB) {
+    if (this.options.sqliteOptions.extensions.length > 0) {
+      for (const extension of this.options.sqliteOptions.extensions) {
+        DB.loadExtension(extension.path, extension.entryPoint);
+      }
+    }
+  }
+
+  private loadPowerSyncExtension(DB: DB) {
     if (Platform.OS === 'ios') {
       const bundlePath: string = NativeModules.PowerSyncOpSqlite.getBundlePath();
       const libPath = `${bundlePath}/Frameworks/powersync-sqlite-core.framework/powersync-sqlite-core`;

packages/powersync-op-sqlite/src/db/SqliteOptions.ts

@@ -29,6 +29,15 @@ export interface SqliteOptions {
    * If set, the database will be encrypted using SQLCipher.
    */
   encryptionKey?: string;
+
+  /**
+   * Load extensions using the path and entryPoint.
+   * More info can be found here https://op-engineering.github.io/op-sqlite/docs/api#loading-extensions.
+   */
+  extensions?: Array<{
+    path: string;
+    entryPoint?: string;
+  }>;
 }
 
 // SQLite journal mode. Set on the primary connection.
@@ -57,5 +66,6 @@ export const DEFAULT_SQLITE_OPTIONS: Required<SqliteOptions> = {
   synchronous: SqliteSynchronous.normal,
   journalSizeLimit: 6 * 1024 * 1024,
   lockTimeoutMs: 30000,
-  encryptionKey: null
+  encryptionKey: null,
+  extensions: []
 };