New hook "support_probe"

doc/Addons.md

@@ -638,6 +638,14 @@ Hook data:
 - **uid** (input): the user id to revoke the block for.
 - **result** (output): a boolean value indicating wether the operation was successful or not.
 
+### support_probe
+
+Called to assert whether a connector addon provides probing capabilities.
+
+Hook data:
+- **protocol** (input): shorthand for the protocol. List of values is available in `src/Core/Protocol.php`.
+- **result** (output): should be true if the connector provides follow capabilities, left alone otherwise.
+
 ### storage_instance
 
 Called when a custom storage is used (e.g. webdav_storage)
@@ -907,6 +915,7 @@ Here is a complete list of all hook callbacks with file locations (as of 24-Sep-
     Hook::callAll('revoke_follow', $hook_data);
     Hook::callAll('block', $hook_data);
     Hook::callAll('unblock', $hook_data);
+    Hook::callAll('support_probe', $hook_data);
 
 ### src/Core/Logger/Factory.php
 

doc/de/Addons.md

@@ -397,6 +397,7 @@ Eine komplette Liste aller Hook-Callbacks mit den zugehörigen Dateien (am 01-Ap
     Hook::callAll('revoke_follow', $hook_data);
     Hook::callAll('block', $hook_data);
     Hook::callAll('unblock', $hook_data);
+    Hook::callAll('support_probe', $hook_data);
 
 ### src/Core/Logger/Factory.php
 

src/Core/Protocol.php

@@ -305,4 +305,26 @@ class Protocol
 
 		return $hook_data['result'];
 	}
+
+	/**
+	 * Returns whether the provided protocol supports probing for contacts
+	 *
+	 * @param $protocol
+	 * @return bool
+	 * @throws HTTPException\InternalServerErrorException
+	 */
+	public static function supportsProbe($protocol): bool
+	{
+		if (in_array($protocol, self::NATIVE_SUPPORT)) {
+			return true;
+		}
+
+		$hook_data = [
+			'protocol' => $protocol,
+			'result' => null
+		];
+		Hook::callAll('support_probe', $hook_data);
+
+		return $hook_data['result'] === true;
+	}
 }

src/Module/Contact/Profile.php

@@ -463,7 +463,7 @@ class Profile extends BaseModule
 			];
 		}
 
-		if (in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
+		if (Protocol::supportsProbe($contact['network'])) {
 			$contact_actions['updateprofile'] = [
 				'label' => $this->t('Refetch contact data'),
 				'url'   => 'contact/' . $contact['id'] . '/updateprofile?t=' . $formSecurityToken,