[Mobile] Image Annotation back-end integration

[canatakan]

Definition

The implementation of Image Annotation UI was completed with:

• 610

• 524

• 507 (tracking issue)

Using the infrastructure created with the implementation mentioned above, I shall complete the network integrations for the Image Annotation functionalities.

Annotation Structure

Our annotations are stored in the back-end as below, complying with the W3C's annotation standards:

{
  "_id": "638f1966144b75e4de3e6fce",
  "@context": "http://www.w3.org/ns/anno.jsonld",
  "type": "Annotation",
  "body": [
    {
      "type": "TextualBody",
      "value": "an interesting perspective",
      "purpose": "commenting"
    }
  ],
  "target": {
    "source": "<base64-image>",
    "selector": {
      "type": "FragmentSelector",
      "conformsTo": "http://www.w3.org/TR/media-frags/",
      "value": "xywh=pixel:115.71886444091797,81.76225280761719,40,60"
    }
  },
  "id": "52-#8c5f2fa2-17ce-4eff-be79-a8e554787586"
}

Tasks

This issue includes these main tasks:

• [x] Get annotations of an image from GET /annotations endpoint
• [x] Create an annotation json complying with the structure above and send requests to POST /annotations endpoint

To build the mentioned annotation object, I shall use the already created json object in #507, parsing and arranging it.

Deadline: 27/12/2022 02:00 Reviewer: @atillaturkmen

[canatakan]

• With commit f2ed583f946b1844375d89627e80bf35a8cbceae, GET /annotations endpoint has been integrated.

• With commit 2904acabe549eb4d0abd9ad2b37ad6a2c60bdd84, POST /annotations endpoint has also been integrated.

• In the POST enpoint implementation while creating the annotation object, we decided to put the link of the image as the source (e.g. https://ideart.tk/api/image/95).

• I also followed the application/ld+json Content Type while communicating with the annotation server, as it required.

[canatakan]

• Hello @atillaturkmen, I have created the pull request and added you as a reviewer. I also resolved the conflicts emerging from various pull requests being merged.

• The code in dev/android/image-annotation-network has been finalized. Please add your review and merge the pull request if everything is okay. Thank you!

[canatakan]

619 has been merged, so this issue can safely be closed.