feat(share): provide canDownload getter on the share

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

Author: susnux

lib/private/Share20/Share.php

@@ -7,6 +7,7 @@
  */
 namespace OC\Share20;
 
+use OCP\Constants;
 use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\File;
 use OCP\Files\FileInfo;
@@ -586,6 +587,19 @@ public function getReminderSent(): bool {
 		return $this->reminderSent;
 	}
 
+	public function canDownload(): bool {
+		if (($this->getPermissions() & Constants::PERMISSION_READ) === 0) {
+			return false;
+		}
+
+		$attributes = $this->getAttributes();
+		if ($attributes?->getAttribute('permissions', 'download') === false) {
+			return false;
+		}
+
+		return true;
+	}
+
 	public function canSeeContent(): bool {
 		$shareManager = Server::get(IManager::class);
 
@@ -595,13 +609,6 @@ public function canSeeContent(): bool {
 			return true;
 		}
 
-		// No "allow preview" header set, so we must check if
-		// the share has not explicitly disabled download permissions
-		$attributes = $this->getAttributes();
-		if ($attributes?->getAttribute('permissions', 'download') === false) {
-			return false;
-		}
-
-		return true;
+		return $this->canDownload();
 	}
 }

lib/public/Share/IShare.php

@@ -645,6 +645,15 @@ public function getReminderSent(): bool;
 	 * Check if the current user can see this share files contents.
 	 * This will check the download permissions as well as the global
 	 * admin setting to allow viewing files without downloading.
+	 *
+	 * @since 32.0.0
 	 */
 	public function canSeeContent(): bool;
+
+	/**
+	 * Check if it is allowed to download this share.
+	 *
+	 * @since 34.0.0
+	 */
+	public function canDownload(): bool;
 }