Add hooks to ExtensionManager (#2482)

Hooks allow to:

- add items in menus
- perform new actions at the end of FreshRSS initialization

1 files changed, 34 insertions, 1 deletions

diff --git a/lib/Minz/ExtensionManager.php b/lib/Minz/ExtensionManager.php
index b086c4001..2240b7642 100644
--- a/lib/Minz/ExtensionManager.php
+++ b/lib/Minz/ExtensionManager.php
@@ -27,14 +27,30 @@ class Minz_ExtensionManager {
 			'list' => array(),
 			'signature' => 'OneToOne',
 		),
-		'post_update' => array(  // function(none) -> none
+		'freshrss_init' => array(  // function() -> none
 			'list' => array(),
 			'signature' => 'NoneToNone',
 		),
+		'menu_admin_entry' => array(  // function() -> string
+			'list' => array(),
+			'signature' => 'NoneToString',
+		),
+		'menu_configuration_entry' => array(  // function() -> string
+			'list' => array(),
+			'signature' => 'NoneToString',
+		),
+		'menu_other_entry' => array(  // function() -> string
+			'list' => array(),
+			'signature' => 'NoneToString',
+		),
 		'nav_reading_modes' => array(  // function($readingModes = array) -> array | null
 			'list' => array(),
 			'signature' => 'OneToOne',
 		),
+		'post_update' => array(  // function(none) -> none
+			'list' => array(),
+			'signature' => 'NoneToNone',
+		),
 		'simplepie_before_init' => array(  // function($simplePie, $feed) -> none
 			'list' => array(),
 			'signature' => 'PassArguments',
@@ -307,6 +323,23 @@ class Minz_ExtensionManager {
 	}
 
 	/**
+	 * Call a hook which takes no argument and returns a string.
+	 *
+	 * The result is concatenated between each hook and the final string is
+	 * returned.
+	 *
+	 * @param string $hook_name is the hook to call.
+	 * @return a concatenated string, result of the call to all the hooks.
+	 */
+	private static function callNoneToString($hook_name) {
+		$result = '';
+		foreach (self::$hook_list[$hook_name]['list'] as $function) {
+			$result = $result . call_user_func($function);
+		}
+		return $result;
+	}
+
+	/**
 	 * Call a hook which takes no argument and returns nothing.
 	 *
 	 * This case is simpler than callOneToOne because hooks are called one by