Endpoint for user's sharings created

api/openapi.yaml

@@ -92,6 +92,34 @@ paths:
         default:
           $ref: '#/components/responses/Error'
 
+  '/api/v1/user/{userId}/sharings':
+    get:
+      tags:
+        - User
+      summary: A list of all sharings with other users.
+      responses:
+        200:
+          description: Returns the success state and a list with all sharings of the user.
+          content:
+            application/json:
+              schema:
+                properties:
+                  success:
+                    $ref: '#/components/schemas/Success'
+                  sharings:
+                    type: array
+                    items:
+                      type: object
+                    example:
+                      - sharingId: 8
+                        userId: 25
+                        userSharingId: 42
+                      - sharingId: 9
+                        userId: 25
+                        userSharingId:
+        default:
+          $ref: '#/components/responses/Error'
+
   '/api/v1/user/{userId}/fingerprints':
     get:
       tags:
@@ -117,6 +145,8 @@ paths:
                       - fingerprintId: 42
                         fingerprint: '6FF8842B6D17F5C2098A3DD8AB55D9158DEF400A48772887A8F61531ED36B2A'
                         userId: 25
+        default:
+          $ref: '#/components/responses/Error'
 
   '/api/v1/user/{userId}/email':
     get:

backend/classes/controller/UserSharingsGetController.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+final class UserSharingsGetController extends AbstractController
+{
+	protected string $route = '/api/v1/user/{userId}/sharings';
+
+	private int $userId;
+
+	public function __construct(string $url)
+	{
+		parent::__construct($url);
+
+		$this->userId = (int)$this->getUrlParamInt('userId');
+	}
+
+	public function handle(): void
+	{
+		$user = new User($this->userId);
+
+		try {
+			$this->response = new ApiJsonResponse();
+			$this->response->setParameter('sharings', $user->getSharings());
+		} catch (Throwable $e) {
+			$this->response = new ApiJsonResponse($e->getCode() !== 0 ? $e->getCode() : ServerStatus::BAD_REQUEST);
+			$this->response->setSuccess(false);
+			$this->response->setMessage($e->getMessage());
+		}
+	}
+}

backend/classes/database/Sharing.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 final class Sharing extends MySqlTable implements JsonSerializable
 {
+	public const FIELD_ID = 'SharingId';
 	public const FIELD_USER = 'User';
 	public const FIELD_USER_SHARED = 'UserShared';
 
@@ -31,6 +32,11 @@ final class Sharing extends MySqlTable implements JsonSerializable
 		return $this->getField(self::FIELD_USER_SHARED);
 	}
 
+	public function setId(int $id): void
+	{
+		$this->setField(self::FIELD_ID, $id);
+	}
+
 	public function setUserId(int $userId): void
 	{
 		$this->setField(self::FIELD_USER, $userId);

backend/classes/database/SharingCollection.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+final class SharingCollection implements Iterator, JsonSerializable
+{
+	private int $position = 0;
+
+	/** @var Sharing[] */
+	private array $sharings = [];
+
+	public function add(Sharing $userId): void
+	{
+		$this->sharings[] = $userId;
+	}
+
+	public function current(): Sharing
+	{
+		return $this->sharings[$this->position];
+	}
+
+	public function next(): void
+	{
+		$this->position++;
+	}
+
+	public function key(): int
+	{
+		return $this->position;
+	}
+
+	public function valid(): bool
+	{
+		return isset($this->sharings[$this->position]);
+	}
+
+	public function rewind(): void
+	{
+		$this->position = 0;
+	}
+
+	public function jsonSerialize()
+	{
+		return $this->sharings;
+	}
+}

backend/classes/database/User.php

@@ -90,9 +90,7 @@ final class User extends MySqlTable implements JsonSerializable
 
 		$id = $database->Select(self::class, [self::FIELD_ID], [self::FIELD_USERNAME => $username])[0][self::FIELD_ID];
 
-		$user = $databaseGiven ? new User((int)$id, $database) : new User((int)$id);
-
-		return $user;
+		return $databaseGiven ? new User((int)$id, $database) : new User((int)$id);
 	}
 
 	public static function getFromEmail(string $email, DatabaseInterface &$database = null): self
@@ -110,9 +108,7 @@ final class User extends MySqlTable implements JsonSerializable
 
 		$id = $database->Select(self::class, [self::FIELD_ID], [self::FIELD_EMAIL => $email])[0][self::FIELD_ID];
 
-		$user = $databaseGiven ? new User((int)$id, $database) : new User((int)$id);
-
-		return $user;
+		return $databaseGiven ? new User((int)$id, $database) : new User((int)$id);
 	}
 
 	public function getFingerprintIds(): array
@@ -140,6 +136,29 @@ final class User extends MySqlTable implements JsonSerializable
 		);
 	}
 
+	public function getSharings(): SharingCollection
+	{
+		$result = $this->database->Select(
+			Sharing::class,
+			[],
+			[Sharing::FIELD_USER => $this->getUserId()]
+		);
+
+		$sharings = new SharingCollection();
+
+		foreach ($result as $record) {
+			$sharing = new Sharing(null, $this->database);
+
+			$sharing->setId((int)$record[Sharing::FIELD_ID]);
+			$sharing->setUserId((int)$record[Sharing::FIELD_USER]);
+			$sharing->setUserShared((int)$record[Sharing::FIELD_USER_SHARED]);
+
+			$sharings->add($sharing);
+		}
+
+		return $sharings;
+	}
+
 	public function jsonSerialize()
 	{
 		return [