# Download Artifacts in Engage Publication
Asking Opencast for Publication details, you get information about the `api` publication (ar rather every non-internal publication published with `publish-configurable`) while you only get information about the existence of the `engage-player` publication but no details:
From `/api/events/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78?withpublications=true`:
```json=
{
"identifier": "9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78",
"creator": "Administrator",
"presenter": [],
"created": "2021-04-16T12:25:00Z",
"is_part_of": "",
"subjects": [],
"start": "2021-04-16T12:25:00Z",
"description": "",
"language": "",
"source": "",
"title": "Opencast Summit - Main Room",
"processing_state": "SUCCEEDED",
"duration": "",
"license": "",
"archive_version": 2,
"contributor": [],
"series": "",
"has_previews": true,
"location": "BigBlueButton",
"rightsholder": "",
"publication_status": [
"internal",
"engage-player",
"api"
],
"status": "EVENTS.EVENTS.STATUS.PROCESSED",
"publications": [
{
"metadata": [],
"attachments": [],
"channel": "engage-player",
"id": "7969ff63-13fb-4a3a-b374-db7e873bce97",
"media": [],
"mediatype": "text/html",
"url": "https://example.opencast.org/play/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78"
},
{
"metadata": [
{
"flavor": "mpeg-7/text",
"size": -1,
"checksum": "",
"id": "6f2cbeb0-1b6e-4860-8da7-9cc92d98a08c",
"mediatype": "text/xml",
"url": "https://example.opencast.org/static/mh_default_org/api/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78/bc0f6369-8fe9-44f2-a303-25c24f9ca52d/slidetext.xml",
"tags": [
"engage-download"
]
}
],
"attachments": [
{
"flavor": "presenter/search+preview",
"ref": "track:track-126",
"size": 2634,
"checksum": "",
"id": "66f99ce5-481a-44a1-94f6-6f5a5dd35c0d",
"mediatype": "image/jpeg",
"url": "https://example.opencast.org/static/mh_default_org/api/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78/01ed7769-dadd-471f-8cc5-a885fc012d4c/presenter_c7a3d3f4_6839_4221_a500_6e8924587ce0_3_000s_search.jpg",
"tags": [
"engage-download"
]
},
{…},
{
"flavor": "presentation/segment+preview",
"ref": "track:7656dc33-8478-4fab-ae93-0ee58d692cca;time=T01:19:20:0F1000",
"size": 2308,
"checksum": "",
"id": "aa836824-3e35-4520-a257-e787475a1c99",
"mediatype": "image/jpeg",
"url": "https://example.opencast.org/static/mh_default_org/api/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78/73ae140b-5b5b-40cd-9f51-5e96693fae38/presentation_c3ea08b2_5bbf_4a2f_baf3_983da88715e9.jpg",
"tags": [
"engage-download"
]
}
],
"channel": "api",
"id": "78a61333-07a6-40e7-9a99-d4a97de8c3a6",
"media": [
{
"has_audio": true,
"framerate": 25,
"description": "",
"bitrate": 710646,
"url": "https://example.opencast.org/static/mh_default_org/api/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78/7c69a9dc-73fb-4324-9273-e49fb1e4317b/presentation_c3ea08b2_5bbf_4a2f_baf3_983da88715e9.mp4",
"has_video": true,
"tags": [
"1440p-quality",
"engage-download",
"engage-streaming"
],
"flavor": "presentation/delivery",
"duration": 13920131,
"size": 1472698132,
"framecount": 348002,
"checksum": "e67842366cc4f935c1fb8033bfa3dcdd (md5)",
"width": 2560,
"id": "a36d4364-c048-411e-8f5d-c1d41f74c5f1",
"mediatype": "video/mp4",
"height": 1316
},
{…},
{
"has_audio": true,
"framerate": 25,
"description": "",
"bitrate": 284628,
"url": "https://example.opencast.org/static/mh_default_org/api/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78/f58f6b80-6dac-4f29-b8dd-611ad956910b/presenter_c7a3d3f4_6839_4221_a500_6e8924587ce0.mp4",
"has_video": true,
"tags": [
"360p-quality",
"engage-download",
"engage-streaming"
],
"flavor": "presenter/delivery",
"duration": 13920131,
"size": 619615050,
"framecount": 348003,
"checksum": "af53db20549dcace7b78c8722d08f6c9 (md5)",
"width": 640,
"id": "e423681b-db95-47b6-8a7f-81e250989843",
"mediatype": "video/mp4",
"height": 360
}
],
"mediatype": "application/json",
"url": "https://admin.example.opencast.org/api/events/9ca1ed2a-4bfd-478f-a8cc-a5108df8ea78"
}
]
}
```
The [relevant code for adding the additional information](https://github.com/opencast/opencast/blob/064a6ec29a3a3d32d0c7ad77f36089c16a1d3cd2/modules/distribution-workflowoperation/src/main/java/org/opencastproject/workflow/handler/distribution/ConfigurablePublishWorkflowOperationHandler.java#L316-L320) could be easily added to the PublishEngageWorkflowOperationHandler:
```java=
for (MediaPackageElement element : elements) {
// Make sure the mediapackage is prompted to create a new identifier for this element
element.setIdentifier(null);
PublicationImpl.addElementToPublication(publication, element);
}
```
This will give us several advantages:
- It allows us to easily access the download artifacts from wherever we list publications
- E.g. we could list this in the admin interfac besides the embed codes
- We don't need the `api` publication any longer since that data is redundant and in a default configuration, the `engage-player` distibution would have all data necessary for integrations
- We have less data duplication
- We have less operations in workflows
## Migration
We already have an optional migration path for old publications since the Workflow „Republish Metadata“ includes the `publish-engage` operation which would now include the new data.
## Configurability
There should be options to turn off the additional data:
- `list-elements`
- Default: `true`
- Include all media package elements
# Download Link Interface
The admin interface already has an interface for getting embed links:
Once we have the download links as part of the publication, we could add the option to copy download links via this interface element as well.
Sign in with Wallet
Connect another wallet