Added an API for a logged in user to retrieve metadata from database

[imjalpreet]

@oparoz I have added the API for a logged in user.

Can you check if its correct?

[imjalpreet]

@oparoz Changes Done.

[oparoz]

You need to add the unit test to make sure things are working as expected.

In the next PR, you'll need to enable the API suite in Codeception to make sure the app is working as expected. Everything you need is in the Gallery app. You will need a shorter version of this to manage users and files: https://github.com/interfasys/galleryplus/blob/master/tests/_support/Helper/DataSetup.php

[oparoz]

Any string

[imjalpreet]

@oparoz I will again have to use setMapperResult, right?

If yes, then I have tried it but I am getting the following error:

1) MetadataControllerTest: Get metadata
 Test  tests/unit/Controller/MetadataControllerTest.php:testGetMetadata
Array (...) does not match expected type "NULL".
#1  /var/www/GSoC/apps/mediametadata/tests/unit/Controller/MetadataControllerTest.php:80
#2  OCA\MediaMetadata\Controller\MetadataControllerTest->testGetMetadata

[oparoz]

I will again have to use setMapperResult, right?

Not this time. You simply need to mock the service. It's much easier since it returns an array.

[imjalpreet]

@oparoz Done.

[imjalpreet]

@oparoz Done.

[oparoz]

CI didn't kick in. Could you please force push the last commit again?

[oparoz]

I'm merging this as-is because we're pressed for time and you need to enable the API suite, but try to think about what your service should do in case of error.

You could get:

• text instead of a fileId
• a fileId which doesn't exist
• a fileID which doesn't have any metadata (a PDF per example)

All these will probably crash your app and we need to make it return an error message instead.

[imjalpreet]

@oparoz Yeah, I understand. I will try to think of all these errors and maybe make a list, so that I can add them afterwards.

[oparoz]

Thank you