feat: Expose MemoryHfsVolume, add copyObject and moveObject (#116)

humanwhocodes · Apr 26, 2024 · ad00da4 · ad00da4
1 parent bb7045e
commit ad00da4
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diff --git a/packages/memory/src/index.js b/packages/memory/src/index.js
@@ -4,4 +4,5 @@
  */
 
 export * from "./memory-hfs.js";
+export { MemoryHfsVolume } from "./memory-hfs-volume.js";
 export { Hfs } from "@humanfs/core";
diff --git a/packages/memory/src/memory-hfs-volume.js b/packages/memory/src/memory-hfs-volume.js
@@ -583,6 +583,70 @@ export class MemoryHfsVolume {
 		}));
 	}
 
+	/**
+	 * Moves an object to a new parent.
+	 * @param {string} id The ID of the object to move.
+	 * @param {string} parentId The ID of the new parent directory.
+	 * @returns {void}
+	 * @throws {NotFoundError} If the object or parent is not found.
+	 * @throws {DirectoryError} If the parent is not a directory.
+	 */
+	moveObject(id, parentId) {
+		const object = this.#objects.get(id);
+
+		if (!object) {
+			throw new NotFoundError(`moveObject ${id}`);
+		}
+
+		const parent = this.#objects.get(parentId);
+
+		if (!parent) {
+			throw new NotFoundError(`moveObject ${parentId}`);
+		}
+
+		if (parent.kind !== "directory") {
+			throw new DirectoryError(`moveObject ${parentId}`);
+		}
+
+		const directory = /** @type {MemoryHfsDirectory} */ (parent);
+
+		object.parent.delete(object.name);
+		directory.add(object);
+	}
+
+	/**
+	 * Copies an object to a new parent.
+	 * @param {string} id The ID of the object to copy.
+	 * @param {string} parentId The ID of the new parent directory.
+	 * @returns {void}
+	 * @throws {NotFoundError} If the object or parent is not found.
+	 * @throws {DirectoryError} If the parent is not a directory.
+	 * @throws {DirectoryError} If the parent is a file.
+	 */
+	copyObject(id, parentId) {
+		const object = this.#objects.get(id);
+
+		if (!object) {
+			throw new NotFoundError(`copyObject ${id}`);
+		}
+
+		const parent = this.#objects.get(parentId);
+
+		if (!parent) {
+			throw new NotFoundError(`copyObject ${parentId}`);
+		}
+
+		if (parent.kind !== "directory") {
+			throw new DirectoryError(`copyObject ${parentId}`);
+		}
+
+		const directory = /** @type {MemoryHfsDirectory} */ (parent);
+		const copy = object.clone();
+
+		directory.add(copy);
+		this.#objects.set(copy.id, copy);
+	}
+
 	//-----------------------------------------------------------------------------
 	// Path-Based Methods
 	//-----------------------------------------------------------------------------

diff --git a/packages/memory/tests/memory-hfs-volume.test.js b/packages/memory/tests/memory-hfs-volume.test.js
@@ -475,4 +475,94 @@ describe("MemoryHfsVolume", () => {
 			assert.throws(() => volume.readDirectoryObject(id), /EISDIR/);
 		});
 	});
+
+	describe("moveObject()", () => {
+		it("should move a file to a new location", () => {
+			volume.writeFile("file.txt", HELLO_WORLD);
+			volume.mkdirp("dir");
+
+			const id = volume.getObjectIdFromPath("file.txt");
+			const parentId = volume.getObjectIdFromPath("dir");
+			volume.moveObject(id, parentId);
+
+			const file = volume.readFile("dir/file.txt");
+			assert.deepEqual(file, HELLO_WORLD);
+		});
+
+		it("should move a directory to a new location", () => {
+			volume.mkdirp("dir");
+			volume.mkdirp("dir2");
+
+			const id = volume.getObjectIdFromPath("dir");
+			const parentId = volume.getObjectIdFromPath("dir2");
+			volume.moveObject(id, parentId);
+
+			const stat = volume.stat("dir2/dir");
+			assert.strictEqual(stat.kind, "directory");
+		});
+
+		it("should throw an error when the ID doesn't exist", () => {
+			assert.throws(() => volume.moveObject("file-1", "dir-1"), /ENOENT/);
+		});
+
+		it("should throw an error when the parent ID doesn't exist", () => {
+			volume.writeFile("file.txt", HELLO_WORLD);
+			const id = volume.getObjectIdFromPath("file.txt");
+			assert.throws(() => volume.moveObject(id, "dir-1"), /ENOENT/);
+		});
+
+		it("should throw an error when the parent ID is a file", () => {
+			volume.writeFile("file.txt", HELLO_WORLD);
+			volume.writeFile("file2.txt", HELLO_WORLD);
+
+			const id = volume.getObjectIdFromPath("file.txt");
+			const parentId = volume.getObjectIdFromPath("file2.txt");
+			assert.throws(() => volume.moveObject(id, parentId), /EISDIR/);
+		});
+	});
+
+	describe("copyObject()", () => {
+		it("should copy a file to a new location", () => {
+			volume.writeFile("file.txt", HELLO_WORLD);
+			volume.mkdirp("dir");
+
+			const id = volume.getObjectIdFromPath("file.txt");
+			const parentId = volume.getObjectIdFromPath("dir");
+			volume.copyObject(id, parentId);
+
+			const file = volume.readFile("dir/file.txt");
+			assert.deepEqual(file, HELLO_WORLD);
+		});
+
+		it("should copy a directory to a new location", () => {
+			volume.mkdirp("dir");
+			volume.mkdirp("dir2");
+
+			const id = volume.getObjectIdFromPath("dir");
+			const parentId = volume.getObjectIdFromPath("dir2");
+			volume.copyObject(id, parentId);
+
+			const stat = volume.stat("dir2/dir");
+			assert.strictEqual(stat.kind, "directory");
+		});
+
+		it("should throw an error when the ID doesn't exist", () => {
+			assert.throws(() => volume.copyObject("file-1", "dir-1"), /ENOENT/);
+		});
+
+		it("should throw an error when the parent ID doesn't exist", () => {
+			volume.writeFile("file.txt", HELLO_WORLD);
+			const id = volume.getObjectIdFromPath("file.txt");
+			assert.throws(() => volume.copyObject(id, "dir-1"), /ENOENT/);
+		});
+
+		it("should throw an error when the parent ID is a file", () => {
+			volume.writeFile("file.txt", HELLO_WORLD);
+			volume.writeFile("file2.txt", HELLO_WORLD);
+
+			const id = volume.getObjectIdFromPath("file.txt");
+			const parentId = volume.getObjectIdFromPath("file2.txt");
+			assert.throws(() => volume.copyObject(id, parentId), /EISDIR/);
+		});
+	});
 });