Major backend refactor (#599)

Backend refactor

common/spaces/space_primitives.test.ts

@@ -0,0 +1,69 @@
+import { assert, assertEquals } from "../../test_deps.ts";
+import { SpacePrimitives } from "./space_primitives.ts";
+
+export async function testSpacePrimitives(spacePrimitives: SpacePrimitives) {
+  const files = await spacePrimitives.fetchFileList();
+  assertEquals(files, []);
+  // Write text file
+  const fileMeta = await spacePrimitives.writeFile(
+    "test.txt",
+    stringToBytes("Hello World"),
+    false,
+    {
+      name: "test.txt",
+      perm: "rw",
+      created: 10,
+      contentType: "text/plain",
+      lastModified: 20,
+      size: 11,
+    },
+  );
+
+  const { data: retrievedData, meta: retrievedMeta } = await spacePrimitives
+    .readFile("test.txt");
+
+  assertEquals(retrievedData, stringToBytes("Hello World"));
+  // Check that the meta data is persisted
+  assertEquals(retrievedMeta.lastModified, 20);
+
+  const fbContent = (await spacePrimitives.readFile("test.txt"))
+    .data;
+  assertEquals(new TextDecoder().decode(fbContent), "Hello World");
+
+  assertEquals(await spacePrimitives.fetchFileList(), [fileMeta]);
+  const buf = new Uint8Array(1024 * 1024);
+  buf.set([1, 2, 3, 4, 5]);
+  // Write binary file
+  await spacePrimitives.writeFile("test.bin", buf);
+  const fMeta = await spacePrimitives.getFileMeta("test.bin");
+  assertEquals(fMeta.size, 1024 * 1024);
+  assertEquals((await spacePrimitives.fetchFileList()).length, 2);
+  //   console.log(spacePrimitives);
+
+  await spacePrimitives.deleteFile("test.bin");
+  assertEquals(await spacePrimitives.fetchFileList(), [fileMeta]);
+
+  // Clean up
+  await spacePrimitives.deleteFile("test.txt");
+  assertEquals(await spacePrimitives.fetchFileList(), []);
+
+  // Test weird file names
+  await spacePrimitives.writeFile("test+'s.txt", stringToBytes("Hello world!"));
+  assertEquals(
+    stringToBytes("Hello world!"),
+    (await spacePrimitives.readFile("test+'s.txt")).data,
+  );
+  await spacePrimitives.deleteFile("test+'s.txt");
+
+  // Check deletion of weird file file name
+  try {
+    await spacePrimitives.getFileMeta("test+'s.txt");
+    assert(false);
+  } catch (e: any) {
+    assertEquals(e.message, "Not found");
+  }
+}
+
+function stringToBytes(str: string): Uint8Array {
+  return new TextEncoder().encode(str);
+}