livephoto: add API to get video

lib/Controller/VideoController.php

@@ -35,8 +35,6 @@ class VideoController extends ApiBase
      * @NoCSRFRequired
      *
      * Transcode a video to HLS by proxy
-     *
-     * @return JSONResponse an empty JSONResponse with respective http status code
      */
     public function transcode(string $client, string $fileid, string $profile): Http\Response
     {
@@ -137,6 +135,41 @@ class VideoController extends ApiBase
         return $response;
     }
 
+    /**
+     * @NoAdminRequired
+     *
+     * @NoCSRFRequired
+     *
+     * Return the live video part of a live photo
+     */
+    public function livephoto(string $fileid)
+    {
+        $fileid = (int) $fileid;
+        $files = $this->rootFolder->getById($fileid);
+        if (0 === \count($files)) {
+            return new JSONResponse(['message' => 'File not found'], Http::STATUS_NOT_FOUND);
+        }
+        $file = $files[0];
+
+        // Check file etag
+        $etag = $file->getEtag();
+        if ($etag !== $this->request->getParam('etag')) {
+            return new JSONResponse(['message' => 'File changed'], Http::STATUS_PRECONDITION_FAILED);
+        }
+
+        // Check file liveid
+        $liveid = $this->request->getParam('liveid');
+        if (!$liveid) {
+            return new JSONResponse(['message' => 'Live ID not provided'], Http::STATUS_BAD_REQUEST);
+        }
+        $lp = $this->timelineQuery->getLivePhoto($fileid);
+        if (!$lp || $lp['liveid'] !== $liveid) {
+            return new JSONResponse(['message' => 'Live ID not found'], Http::STATUS_NOT_FOUND);
+        }
+
+        return new JSONResponse($lp);
+    }
+
     private function getUpstream($client, $path, $profile)
     {
         $path = rawurlencode($path);

lib/Db/TimelineQuery.php

@@ -14,6 +14,7 @@ class TimelineQuery
     use TimelineQueryFaces;
     use TimelineQueryFilters;
     use TimelineQueryFolders;
+    use TimelineQueryLivePhoto;
     use TimelineQueryTags;
 
     protected IDBConnection $connection;

lib/Db/TimelineQueryDays.php

@@ -152,7 +152,7 @@ trait TimelineQueryDays
         // We don't actually use m.datetaken here, but postgres
         // needs that all fields in ORDER BY are also in SELECT
         // when using DISTINCT on selected fields
-        $query->select($fileid, 'm.isvideo', 'm.video_duration', 'm.datetaken', 'm.dayid', 'm.w', 'm.h')
+        $query->select($fileid, 'm.isvideo', 'm.video_duration', 'm.datetaken', 'm.dayid', 'm.w', 'm.h', 'm.liveid')
             ->from('memories', 'm')
         ;
 
@@ -282,6 +282,9 @@ trait TimelineQueryDays
                 $row['isfavorite'] = 1;
             }
             unset($row['categoryid']);
+            if (!$row['liveid']) {
+                unset($row['liveid']);
+            }
 
             // Check if path exists and starts with basePath and remove
             if (isset($row['path']) && !empty($row['path'])) {

lib/Db/TimelineQueryLivePhoto.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Memories\Db;
+
+trait TimelineQueryLivePhoto
+{
+    public function getLivePhoto(int $fileid)
+    {
+        $qb = $this->connection->getQueryBuilder();
+        $qb->select('lp.fileid', 'lp.liveid')
+            ->from('memories', 'm')
+            ->where($qb->expr()->eq('m.fileid', $qb->createNamedParameter($fileid)))
+            ->innerJoin('m', 'memories_livephoto', 'lp', $qb->expr()->andX(
+                $qb->expr()->eq('lp.liveid', 'm.liveid'),
+            ))
+        ;
+        $result = $qb->executeQuery();
+        $row = $result->fetch();
+        $result->closeCursor();
+
+        return $row;
+    }
+}