Implement getExportEstimatedSize in migrators

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/dav/lib/UserMigration/CalendarMigrator.php

@@ -206,6 +206,21 @@ class CalendarMigrator implements IMigrator {
 		return $calendarUri;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getExportEstimatedSize(IUser $user): int {
+		$principalUri = $this->getPrincipalUri($user);
+
+		return array_sum(array_map(
+			function (ICalendar $calendar) use ($user): int {
+				// FIXME 1MiB by calendar, no idea if this is accurate and if we should go into more details
+				return 1000;
+			},
+			$this->calendarManager->getCalendarsForPrincipal($principalUri),
+		));
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */

apps/dav/lib/UserMigration/ContactsMigrator.php

@@ -193,6 +193,21 @@ class ContactsMigrator implements IMigrator {
 		);
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getExportEstimatedSize(IUser $user): int {
+		$principalUri = $this->getPrincipalUri($user);
+
+		return array_sum(array_map(
+			function (array $addressBookInfo) use ($user): int {
+				// FIXME 1MiB by addressbook, no idea if this is accurate and if we should go into more details
+				return 1000;
+			},
+			$this->cardDavBackend->getAddressBooksForUser($principalUri),
+		));
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */

apps/files_trashbin/lib/UserMigration/TrashbinMigrator.php

@@ -63,6 +63,23 @@ class TrashbinMigrator implements IMigrator {
 		$this->l10n = $l10n;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getExportEstimatedSize(IUser $user): int {
+		$uid = $user->getUID();
+
+		try {
+			$trashbinFolder = $this->root->get('/'.$uid.'/files_trashbin');
+			if (!$trashbinFolder instanceof Folder) {
+				return 0;
+			}
+			return (int)ceil($trashbinFolder->getSize() / 1024);
+		} catch (\Throwable $e) {
+			return 0;
+		}
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */

apps/settings/lib/UserMigration/AccountMigrator.php

@@ -68,6 +68,27 @@ class AccountMigrator implements IMigrator {
 		$this->l10n = $l10n;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getExportEstimatedSize(IUser $user): int {
+		$uid = $user->getUID();
+
+		$size = 100; // 100KiB for account JSON
+
+		try {
+			$avatar = $this->avatarManager->getAvatar($user->getUID());
+			if ($avatar->isCustomAvatar()) {
+				$avatarFile = $avatar->getFile(-1);
+				$size += $avatarFile->getSize() / 1024;
+			}
+		} catch (Throwable $e) {
+			return 0;
+		}
+
+		return (int)ceil($size);
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */

lib/public/UserMigration/IMigrator.php

@@ -93,7 +93,7 @@ interface IMigrator {
 	 *
 	 * @since 24.0.0
 	 */
-	public function getExportEstimatedSize(): int;
+	public function getExportEstimatedSize(IUser $user): int;
 
 	/**
 	 * Checks whether it is able to import a version of the export format for this migrator