feat(search): live photo facet

[dschmidt]

Stacked on #3200 (motion photo).

Draft: adds the Apple Live Photo facet to the search index, the search API and the graph driveItem.

An Apple Live Photo is a pair of files (a still + a separate .mov) linked by a shared content identifier. Maps contentId (from com.apple.quicktime.content.identifier on the video, or the Apple maker note Content Identifier on the still, parsed since metadata-extractor 2.21.0), stillImageTimeUs, auto, vitalityScore and vitalityScoringVersion. Verified against the pinned Tika 4.0 snapshot with a real .mov (com.apple.quicktime.live-photo.* atoms are surfaced generically).

Needs a separate reva change (same as #3200): the WebDAV PROPFIND handler must know the livePhoto keys. It lives in vendored reva, so it needs its own reva PR + bump:

diff --git a/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go b/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go
index d86367a2c5..815a823e11 100644
--- a/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go
+++ b/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go
@@ -107,6 +107,13 @@ var (
 		"orientation",
 		"takenDateTime",
 	}
+	livePhotoKeys = []string{
+		"auto",
+		"contentId",
+		"stillImageTimeUs",
+		"vitalityScore",
+		"vitalityScoringVersion",
+	}
 )
 
 type countingReader struct {
@@ -887,6 +894,8 @@ func metadataKeys(pf XML) ([]string, []string) {
 					metadataKeys = append(metadataKeys, metadataKeysWithPrefix("libre.graph.image", imageKeys)...)
 				case "http://owncloud.org/ns/photo":
 					metadataKeys = append(metadataKeys, metadataKeysWithPrefix("libre.graph.photo", photoKeys)...)
+				case "http://owncloud.org/ns/livePhoto":
+					metadataKeys = append(metadataKeys, metadataKeysWithPrefix("libre.graph.livePhoto", livePhotoKeys)...)
 				default:
 					metadataKeys = append(metadataKeys, key)
 				}
@@ -944,7 +953,7 @@ func requiresExplicitFetching(n *xml.Name) bool {
 		}
 	case net.NsOwncloud:
 		switch n.Local {
-		case "favorite", "share-types", "checksums", "size", "tags", "audio", "location", "image", "photo":
+		case "favorite", "share-types", "checksums", "size", "tags", "audio", "location", "image", "photo", "livePhoto":
 			return true
 		default:
 			return false
@@ -1292,6 +1301,7 @@ func mdToPropResponse(ctx context.Context, pf *XML, md *provider.ResourceInfo, p
 			appendMetadataProp(k, "oc", "location", "libre.graph.location", locationKeys)
 			appendMetadataProp(k, "oc", "image", "libre.graph.image", imageKeys)
 			appendMetadataProp(k, "oc", "photo", "libre.graph.photo", photoKeys)
+			appendMetadataProp(k, "oc", "livePhoto", "libre.graph.livePhoto", livePhotoKeys)
 		}
 
 		if md.Type == provider.ResourceType_RESOURCE_TYPE_CONTAINER {
@@ -1579,6 +1589,10 @@ func mdToPropResponse(ctx context.Context, pf *XML, md *provider.ResourceInfo, p
 					if k := md.GetArbitraryMetadata().GetMetadata(); k != nil {
 						appendMetadataProp(k, "oc", "photo", "libre.graph.photo", photoKeys)
 					}
+				case "livePhoto":
+					if k := md.GetArbitraryMetadata().GetMetadata(); k != nil {
+						appendMetadataProp(k, "oc", "livePhoto", "libre.graph.livePhoto", livePhotoKeys)
+					}
 				case "name":
 					appendToOK(prop.Escaped("oc:name", md.Name))
 				case "shareid":

[codacy-production]

Not up to standards ⛔

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