Endpoint to retrieve content of a folder

[sylvanie85]

https://github.com/ai-cfia/nachet-frontend/issues/172 : "As a User, I'd like to be able to access the pictures from other folders"

The backend needs new routes that takes a user id and a folder id as parameters to retrieve pictures and inferences from them using datastore functions.

We'll do this in 2 steps: first, we want to retrieve only the names of the pictures, if they've been verified or come from a batch download, for example. Then, if the user clicks on a picture, we'll retrieve the inference and the picture from blob storage.

/get-directories

• method : Post
• parameters needed : container_name (uuid)
• return : The directories route retreives all user directories from the database with their pictures as a json. There is 4 different cases for the pictures :

is_verified \ inference_exist	false	true
false	should not happend	inference not verified
true	batch import	inference verified

{
"folders" : [
        {
            "picture_set_id" : "xxxx-xxxx-xxxx-xxxx",
            "folder_name" : "folder name",
            "nb_pictures": 4,
            "pictures" : [
                {
                    "picture_id" : "xxxx-xxxx-xxxx-xxxx",
                    "inference_exist": false,
                    "is_validated": true
                },
                ...
            ]
        },
        ...
    ]
}

/get-picture

• method : Post

• parameters needed :

  • container_name (uuid)
  • picture_id
  • folder_uuid

• return : This route will retreive selected picture as a json :

{
    "picture_id" : "xxxx-xxxx-xxxx-xxxx",
    "inference": {
     }
    "image": "xxxxxxxxxxx"
}

• [x] new /get-directories route
• [x] new /get-picture route