init opfs and sqlocal as another browser adapter

app/src/adapter/browser/mock.ts

@@ -0,0 +1,136 @@
+// mock OPFS API for testing
+class MockFileSystemFileHandle {
+   kind: "file" = "file";
+   name: string;
+   private content: ArrayBuffer;
+   private lastModified: number;
+
+   constructor(name: string, content: ArrayBuffer = new ArrayBuffer(0)) {
+      this.name = name;
+      this.content = content;
+      this.lastModified = Date.now();
+   }
+
+   async getFile(): Promise<File> {
+      return new File([this.content], this.name, {
+         lastModified: this.lastModified,
+         type: this.guessMimeType(),
+      });
+   }
+
+   async createWritable(): Promise<FileSystemWritableFileStream> {
+      const handle = this;
+      return {
+         async write(data: any) {
+            if (data instanceof ArrayBuffer) {
+               handle.content = data;
+            } else if (ArrayBuffer.isView(data)) {
+               handle.content = data.buffer.slice(
+                  data.byteOffset,
+                  data.byteOffset + data.byteLength,
+               ) as ArrayBuffer;
+            } else if (data instanceof Blob) {
+               handle.content = await data.arrayBuffer();
+            }
+            handle.lastModified = Date.now();
+         },
+         async close() {},
+         async abort() {},
+         async seek(_position: number) {},
+         async truncate(_size: number) {},
+      } as FileSystemWritableFileStream;
+   }
+
+   private guessMimeType(): string {
+      const ext = this.name.split(".").pop()?.toLowerCase();
+      const mimeTypes: Record<string, string> = {
+         png: "image/png",
+         jpg: "image/jpeg",
+         jpeg: "image/jpeg",
+         gif: "image/gif",
+         webp: "image/webp",
+         svg: "image/svg+xml",
+         txt: "text/plain",
+         json: "application/json",
+         pdf: "application/pdf",
+      };
+      return mimeTypes[ext || ""] || "application/octet-stream";
+   }
+}
+
+export class MockFileSystemDirectoryHandle {
+   kind: "directory" = "directory";
+   name: string;
+   private files: Map<string, MockFileSystemFileHandle> = new Map();
+   private directories: Map<string, MockFileSystemDirectoryHandle> = new Map();
+
+   constructor(name: string = "root") {
+      this.name = name;
+   }
+
+   async getFileHandle(
+      name: string,
+      options?: FileSystemGetFileOptions,
+   ): Promise<FileSystemFileHandle> {
+      if (this.files.has(name)) {
+         return this.files.get(name) as any;
+      }
+      if (options?.create) {
+         const handle = new MockFileSystemFileHandle(name);
+         this.files.set(name, handle);
+         return handle as any;
+      }
+      throw new Error(`File not found: ${name}`);
+   }
+
+   async getDirectoryHandle(
+      name: string,
+      options?: FileSystemGetDirectoryOptions,
+   ): Promise<FileSystemDirectoryHandle> {
+      if (this.directories.has(name)) {
+         return this.directories.get(name) as any;
+      }
+      if (options?.create) {
+         const handle = new MockFileSystemDirectoryHandle(name);
+         this.directories.set(name, handle);
+         return handle as any;
+      }
+      throw new Error(`Directory not found: ${name}`);
+   }
+
+   async removeEntry(name: string, _options?: FileSystemRemoveOptions): Promise<void> {
+      this.files.delete(name);
+      this.directories.delete(name);
+   }
+
+   async *entries(): AsyncIterableIterator<[string, FileSystemHandle]> {
+      for (const [name, handle] of this.files) {
+         yield [name, handle as any];
+      }
+      for (const [name, handle] of this.directories) {
+         yield [name, handle as any];
+      }
+   }
+
+   async *keys(): AsyncIterableIterator<string> {
+      for (const name of this.files.keys()) {
+         yield name;
+      }
+      for (const name of this.directories.keys()) {
+         yield name;
+      }
+   }
+
+   async *values(): AsyncIterableIterator<FileSystemHandle> {
+      for (const handle of this.files.values()) {
+         yield handle as any;
+      }
+      for (const handle of this.directories.values()) {
+         yield handle as any;
+      }
+   }
+
+   [Symbol.asyncIterator](): AsyncIterableIterator<[string, FileSystemHandle]> {
+      return this.entries();
+   }
+}