Add user profile picture boolean to capabilities

apps/files_sharing/lib/Capabilities.php

@@ -70,7 +70,7 @@ public function getCapabilities() {
 		if ($this->config->getAppValue('core', 'shareapi_enabled', 'yes') !== 'yes') {
 			$res['api_enabled'] = false;
 			$res['public'] = ['enabled' => false];
-			$res['user'] = ['send_mail' => false];
+			$res['user'] = ['send_mail' => false, 'profile_picture' => true];
 			$res['resharing'] = false;
 			$res['can_share'] = false;
 			$res['providers_capabilities'] = false;
@@ -111,6 +111,7 @@ public function getCapabilities() {
 			$res["public"] = $public;
 
 			$res['user']['send_mail'] = $this->config->getAppValue('core', 'shareapi_allow_mail_notification', 'no') === 'yes';
+			$res['user']['profile_picture'] = true;
 			$res['user']['expire_date'] = [];
 			$res['user']['expire_date']['enabled'] = $this->config->getAppValue('core', 'shareapi_default_expire_date_user_share', 'no') === 'yes';
 			if ($res['user']['expire_date']['enabled']) {

apps/files_sharing/tests/CapabilitiesTest.php

@@ -112,6 +112,7 @@ public function testDisabledSharingAPI() {
 		$this->assertFalse($result['can_share']);
 		$this->assertFalse($result['public']['enabled']);
 		$this->assertFalse($result['user']['send_mail']);
+		$this->assertTrue($result['user']['profile_picture']);
 		$this->assertFalse($result['resharing']);
 	}
 
@@ -313,6 +314,14 @@ public function testUserNoSendMail() {
 		$this->assertFalse($result['user']['send_mail']);
 	}
 
+	public function testProfilePictureCapability() {
+		$map = [
+			['core', 'shareapi_enabled', 'yes', 'yes']
+		];
+		$result = $this->getResults($map);
+		$this->assertTrue($result['user']['profile_picture']);
+	}
+
 	public function testResharing() {
 		$map = [
 			['core', 'shareapi_enabled', 'yes', 'yes'],

changelog/unreleased/38722

@@ -0,0 +1,6 @@
+Enhancement: Communicate user profile picture capability
+
+A new capability "profile_picture" has been added so that clients can know
+whether to fetch and render avatar images of users.
+
+https://github.com/owncloud/core/pull/38722

tests/acceptance/features/apiCapabilities/capabilities.feature

@@ -121,6 +121,14 @@ Feature: capabilities
       | files      | file_locking_support            | 1     |
       | files      | file_locking_enable_file_action | 1     |
 
+  @smokeTest @skipOnOcV10.6 @skipOnOcV10.7.0
+  # These are new capabilities after 10.7.0
+  Scenario: getting default capabilities with admin user
+    When the administrator retrieves the capabilities using the capabilities API
+    Then the capabilities should contain
+      | capability    | path_to_element        | value |
+      | files_sharing | user@@@profile_picture | 1     |
+
   @files_trashbin-app-required
   Scenario: getting trashbin app capability with admin user
     When the administrator retrieves the capabilities using the capabilities API