Add checkDirExists endpoint + tests

[lansolo99]

This PR closes #13
I mostly created derived logic from checkIfFileExists.
I also created the relative tests. I was able to find how to test the status 400 properly, it fallbacks to 404.

I noticed a lot of test errors when executing bun test
My coverage is 92%.

[Xkonti]

Tests are suggesting issue with the positive test:

1 tests failed:
(fail) should return HTTP Status 204 if the directory is found [0.95ms]

Check failure on line 37 in src/endpoints/dir/checkDirExists.test.ts

GitHub Actions
/ check-pr
error: expect(received).toBe(expected)
Expected: 204
Received: 404

[lansolo99]

@Xkonti Fixed the status 204 test by adding proper filter to the tested directories terms.

[Xkonti]

Looks great. There's just one last thing before I can merge it in. Thank you!

[Xkonti]

You can get the relative path and absolute path at the same time using validateRelativePath. This way we will avoid same checking logic in multiple spots:

// Performs validation of the `query.path`
const dirPathValidationResult = validateRelativePath(query.path);
if (dirPathValidationResult.isErr()) {
  set.status = 400;
  return provideValidPathDirMsg;
}
// Create variable to hold relative and absolute path
const dirPath = sourcePathValidationResult.value;

// Using the relative and absolute path:
let something = dirPath.relativePath;
let somethingElse = dirPath.absolutePath;

[lansolo99]

I reused it. Though the absolutePath doesn't seems necessary for this endpoint, I just used the relativePath from the value.

[Xkonti]

Looks like you're using the absolute path in line 19:

// Get the full path to the directory
const dirPath = join(getConfig().dataDir, relativePath);

Here's whot it looks like in validateRealativePath:

file-api/src/utils/pathUtils.ts

Lines 27 to 30 in bd3b6fb

	// Get the full path to the file
	const relativePath = path as string;
	const absolutePath = join(getConfig().dataDir, relativePath);
	return ok({relativePath, absolutePath});

[lansolo99]

@Xkonti I didn't notice it was the same piece of logic, my bad. So I only use the already returned absolutePath this time.

[Xkonti]

Looks awesome. Thanks!