Show correct author in Stud.IP

[tibroc]

Currently the author of the event shown in Stud.IP is apparently the user of the last workflow in opencast:

This should be the author of the event in Stud.IP.

In this example Manuel is the only user not "administrator" because he has an actual respective Opencast user. Also the Author name is only set by a later cronjob instead of setting it directly (it should be known from the beginning).

[dennis531]

Related #903

[dennis531]

It seems that Opencast saves the Dublin Core entry creator under presenter in the metadata. Thus, no creator is delivered in the requested event, but the creator can be found under presenter.

Example
Upload dublin core in SOP:

<?xml+version="1.0"+encoding="UTF-8"?>
<dublincore+xmlns="http://www.opencastproject.org/xsd/1.0/dublincore/"+xmlns:dcterms="http://purl.org/dc/terms/"+xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<dcterms:creator>root@studip</dcterms:creator>
<dcterms:contributor>Dennis+Benz+</dcterms:contributor>
<dcterms:subject>Medienupload,+Stud.IP</dcterms:subject>
<dcterms:created+xsi:type="dcterms:W3CDTF">2024-01-26T15:47:00.000Z</dcterms:created>
<dcterms:description></dcterms:description>
<dcterms:language><![CDATA[]]></dcterms:language>
<dcterms:title>Test+WF</dcterms:title>
<dcterms:isPartOf></dcterms:isPartOf></dublincore>

Event from Opencast:

object(stdClass)#383 (23) {
  ["identifier"]=>
  string(36) "8f783502-d36e-4b33-8ddd-196fedd08a67"
  ["creator"]=>
  string(0) ""
  ["presenter"]=>
  array(1) {
    [0]=>
    string(11) "root@studip"
  }
  ["created"]=>
  string(20) "2024-01-26T15:47:00Z"
  ["is_part_of"]=>
  string(0) ""
  ["subjects"]=>
  array(2) {
    [0]=>
    string(12) "Medienupload"
    [1]=>
    string(7) "Stud.IP"
  }
  ["start"]=>
  string(20) "2024-01-26T15:47:00Z"
  ["description"]=>
  string(0) ""
  ["language"]=>
  string(0) ""
  ["source"]=>
  string(0) ""
  ["title"]=>
  string(7) "Test WF"
  ["processing_state"]=>
  string(9) "SUCCEEDED"
  ["duration"]=>
  NULL
  ["license"]=>
  string(0) ""
  ["archive_version"]=>
  int(3)
  ["contributor"]=>
  array(1) {
    [0]=>
    string(11) "Dennis Benz"
  }
  ["series"]=>
  string(0) ""
  ["has_previews"]=>
  bool(true)
  ["location"]=>
  string(0) ""
  ["rightsholder"]=>
  string(0) ""
  ["publication_status"]=>
  array(2) {
    [0]=>
    string(8) "internal"
    [1]=>
    string(13) "engage-player"
  }
  ["status"]=>
  string(30) "EVENTS.EVENTS.STATUS.PROCESSED"
  ["publications"]=>
  array(1) {
    [0]=>
    object(stdClass)#389 (7) {
      ["metadata"]=>
      array(1) {
        [0]=>
        object(stdClass)#384 (7) {
          ["flavor"]=>
          string(18) "dublincore/episode"
          ["size"]=>
          int(-1)
          ["checksum"]=>
          string(0) ""
          ["id"]=>
          string(36) "71493609-bab4-4a5a-b172-d91a947565d1"
          ["mediatype"]=>
          string(8) "text/xml"
          ["url"]=>
          string(146) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/57721800-112c-4afd-8472-d1ef2cfaf572/dublincore.xml"
          ["tags"]=>
          array(1) {
            [0]=>
            string(7) "archive"
          }
        }
      }
      ["attachments"]=>
      array(5) {
        [0]=>
        object(stdClass)#387 (8) {
          ["flavor"]=>
          string(26) "presenter/timeline+preview"
          ["ref"]=>
          string(42) "track:753f5122-87bb-4541-a9a6-667199a26288"
          ["size"]=>
          int(-1)
          ["checksum"]=>
          string(0) ""
          ["id"]=>
          string(36) "133ac0a9-ecb7-4ebf-ad26-71a1e95737a0"
          ["mediatype"]=>
          string(9) "image/png"
          ["url"]=>
          string(226) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/12b7de0f-412b-4829-8636-924d759cc387/3c3757bc-6af9-4b67-b471-f07466e5b0ee_5aac31f7-5fe7-47f1-b42d-f4d03950c88e_timelinepreviews.png"
          ["tags"]=>
          array(1) {
            [0]=>
            string(15) "engage-download"
          }
        }
        [1]=>
        object(stdClass)#386 (8) {
          ["flavor"]=>
          string(22) "presenter/feed+preview"
          ["ref"]=>
          string(42) "track:753f5122-87bb-4541-a9a6-667199a26288"
          ["size"]=>
          int(1115)
          ["checksum"]=>
          string(0) ""
          ["id"]=>
          string(36) "4d610ff2-4cc7-4ce9-8743-00e8c69c45ce"
          ["mediatype"]=>
          string(10) "image/jpeg"
          ["url"]=>
          string(184) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/a7de35f8-70e4-4ed1-bf3c-96ca89c14e5c/3c3757bc-6af9-4b67-b471-f07466e5b0ee_3.000s-feed.jpg"
          ["tags"]=>
          array(2) {
            [0]=>
            string(4) "atom"
            [1]=>
            string(3) "rss"
          }
        }
        [2]=>
        object(stdClass)#382 (8) {
          ["flavor"]=>
          string(22) "security/xacml+episode"
          ["ref"]=>
          string(0) ""
          ["size"]=>
          int(-1)
          ["checksum"]=>
          string(0) ""
          ["id"]=>
          string(36) "d69a4435-b8e1-4fe0-989b-8da7f9aa7cf6"
          ["mediatype"]=>
          string(8) "text/xml"
          ["url"]=>
          string(139) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/232b1913-64c1-44f7-907d-01f5e3ce1a1a/acl.xml"
          ["tags"]=>
          array(1) {
            [0]=>
            string(7) "archive"
          }
        }
        [3]=>
        object(stdClass)#393 (8) {
          ["flavor"]=>
          string(24) "presenter/search+preview"
          ["ref"]=>
          string(42) "track:753f5122-87bb-4541-a9a6-667199a26288"
          ["size"]=>
          int(2040)
          ["checksum"]=>
          string(0) ""
          ["id"]=>
          string(36) "426caf6d-2465-451e-80ad-3fa2c8fcb60a"
          ["mediatype"]=>
          string(10) "image/jpeg"
          ["url"]=>
          string(186) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/06131aa6-8878-478d-b58c-ebfec314bd21/3c3757bc-6af9-4b67-b471-f07466e5b0ee_3.000s-search.jpg"
          ["tags"]=>
          array(1) {
            [0]=>
            string(15) "engage-download"
          }
        }
        [4]=>
        object(stdClass)#390 (8) {
          ["flavor"]=>
          string(24) "presenter/player+preview"
          ["ref"]=>
          string(0) ""
          ["size"]=>
          int(-1)
          ["checksum"]=>
          string(0) ""
          ["id"]=>
          string(36) "868ce6a2-5565-49f4-b055-3ccc79ad8dca"
          ["mediatype"]=>
          string(9) "image/png"
          ["url"]=>
          string(146) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/9a26c88c-58f3-433d-80b7-1af01b32f12c/coverimage.png"
          ["tags"]=>
          array(1) {
            [0]=>
            string(15) "engage-download"
          }
        }
      }
      ["channel"]=>
      string(13) "engage-player"
      ["id"]=>
      string(36) "514dc16e-d0fb-411f-8a51-1d663490a437"
      ["media"]=>
      array(3) {
        [0]=>
        object(stdClass)#301 (18) {
          ["has_audio"]=>
          bool(false)
          ["framerate"]=>
          float(25)
          ["description"]=>
          string(0) ""
          ["bitrate"]=>
          float(453817)
          ["is_master_playlist"]=>
          bool(false)
          ["url"]=>
          string(172) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/8de98d0c-3592-46bd-8ee5-e1b29668488f/3c3757bc-6af9-4b67-b471-f07466e5b0ee.mp4"
          ["has_video"]=>
          bool(true)
          ["tags"]=>
          array(3) {
            [0]=>
            string(13) "1080p-quality"
            [1]=>
            string(15) "engage-download"
            [2]=>
            string(16) "engage-streaming"
          }
          ["flavor"]=>
          string(18) "presenter/delivery"
          ["duration"]=>
          int(120560)
          ["size"]=>
          int(6874780)
          ["framecount"]=>
          int(3014)
          ["checksum"]=>
          string(38) "174669517b000e50ee5f02ccea937bca (md5)"
          ["width"]=>
          int(1920)
          ["is_live"]=>
          bool(false)
          ["id"]=>
          string(36) "14e5944c-eaa9-4de1-8fb5-e0c5781f7a6e"
          ["mediatype"]=>
          string(9) "video/mp4"
          ["height"]=>
          int(1080)
        }
        [1]=>
        object(stdClass)#392 (18) {
          ["has_audio"]=>
          bool(false)
          ["framerate"]=>
          float(25)
          ["description"]=>
          string(0) ""
          ["bitrate"]=>
          float(241812)
          ["is_master_playlist"]=>
          bool(false)
          ["url"]=>
          string(172) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/888de2dc-05ad-41c3-b069-34395903556f/3c3757bc-6af9-4b67-b471-f07466e5b0ee.mp4"
          ["has_video"]=>
          bool(true)
          ["tags"]=>
          array(3) {
            [0]=>
            string(12) "720p-quality"
            [1]=>
            string(15) "engage-download"
            [2]=>
            string(16) "engage-streaming"
          }
          ["flavor"]=>
          string(18) "presenter/delivery"
          ["duration"]=>
          int(120560)
          ["size"]=>
          int(3680135)
          ["framecount"]=>
          int(3014)
          ["checksum"]=>
          string(38) "5c7c1e564e3421349d89a3a247527b49 (md5)"
          ["width"]=>
          int(1280)
          ["is_live"]=>
          bool(false)
          ["id"]=>
          string(36) "5ba15ba2-8c17-4111-9ea2-20bf651eeef4"
          ["mediatype"]=>
          string(9) "video/mp4"
          ["height"]=>
          int(720)
        }
        [2]=>
        object(stdClass)#394 (18) {
          ["has_audio"]=>
          bool(false)
          ["framerate"]=>
          float(25)
          ["description"]=>
          string(0) ""
          ["bitrate"]=>
          float(142007)
          ["is_master_playlist"]=>
          bool(false)
          ["url"]=>
          string(172) "http://localhost:8080/static/mh_default_org/engage-player/8f783502-d36e-4b33-8ddd-196fedd08a67/05783920-9e55-4b6b-8b22-7278d77d6a68/3c3757bc-6af9-4b67-b471-f07466e5b0ee.mp4"
          ["has_video"]=>
          bool(true)
          ["tags"]=>
          array(3) {
            [0]=>
            string(12) "480p-quality"
            [1]=>
            string(15) "engage-download"
            [2]=>
            string(16) "engage-streaming"
          }
          ["flavor"]=>
          string(18) "presenter/delivery"
          ["duration"]=>
          int(120560)
          ["size"]=>
          int(2176350)
          ["framecount"]=>
          int(3014)
          ["checksum"]=>
          string(38) "b85a0c979a90514fc68d37b7f74a4950 (md5)"
          ["width"]=>
          int(854)
          ["is_live"]=>
          bool(false)
          ["id"]=>
          string(36) "2342a225-beed-49cd-9d0d-39dd07a7e175"
          ["mediatype"]=>
          string(9) "video/mp4"
          ["height"]=>
          int(480)
        }
      }
      ["mediatype"]=>
      string(9) "text/html"
      ["url"]=>
      string(63) "http://localhost:8080/play/8f783502-d36e-4b33-8ddd-196fedd08a67"
    }
  }
}

Possible solutions:

1. Ignore Opencast's author value if video has auhor
   • Problem: Could lead to inconsistent data
2. or use presenter for author
   • Problems: editable and multiple values

I prefer first solution as studip should know the uploader of the video. But this doesn't work for opencast studio recordings.

Edit:
Alternatively, we could remove the author and add presenters in the plugin. The plugin would then show presenters and contributors for each video.

[dennis531]

Note about the name flows:

[tgloeggl]

• The presenter is displayed on the video title after opening the video -> Therefore it might make sense to always pass the fullname to the the presenter field in OC
• In Stud.IP there could be either presented the field from OC or the owners (as denoted in the Stud.IP DB)
  • Question: Should the field the be named "Authors"? There is also the option to jus remove the column - there is no need to show something there.
  • One could also argue to combine the presenters and contributors from OC

[dennis531]

Concept:

• Strictly distinguish between ACL (permissions) and metadata
• Show only metadata in Stud.IP
  • Metadata: Presenter(s), Contributor(s)
• Rename author to presenter(s)
• Don't use uploader as presenter
  • Add text input in upload dialog for presenter(s) to allow changes
    • uploader name as default for presenter(s)
    • empty text input as default for contributor(s)