Support getting a single project in REST API

Fixes #24333

api/rest/restcore/projects_rest.php

@@ -25,6 +25,8 @@
 $g_app->group('/projects', function() use ( $g_app ) {
 	$g_app->get( '', 'rest_projects_get' );
 	$g_app->get( '/', 'rest_projects_get' );
+	$g_app->get( '/{id}', 'rest_projects_get' );
+	$g_app->get( '/{id}/', 'rest_projects_get' );
 });
 
 /**
@@ -36,10 +38,17 @@
  * @return \Slim\Http\Response The augmented response.
  */
 function rest_projects_get( \Slim\Http\Request $p_request, \Slim\Http\Response $p_response, array $p_args ) {
+	$t_project_id = isset( $p_args['id'] ) ? $p_args['id'] : $p_request->getParam( 'id' );
+	if( is_blank( $t_project_id ) ) {
+		$t_project_id = ALL_PROJECTS;
+	} else {
+		$t_project_id = (int)$t_project_id;
+	}
+
 	$t_user_id = auth_get_current_user_id();
 	$t_lang = mci_get_user_lang( $t_user_id );
 
-	$t_project_ids = user_get_all_accessible_projects( $t_user_id, /* disabled */ false );
+	$t_project_ids = user_get_all_accessible_projects( $t_user_id, $t_project_id );
 	$t_projects = array();
 
 	foreach( $t_project_ids as $t_project_id ) {

core/project_api.php

@@ -60,6 +60,8 @@
 $g_cache_project_missing = array();
 $g_cache_project_all = false;
 
+use Mantis\Exceptions\ClientException;
+
 /**
  * Checks if there are no projects defined.
  * @return boolean true if there are no projects defined, false otherwise.
@@ -110,11 +112,10 @@ function project_cache_row( $p_project_id, $p_trigger_errors = true ) {
 		$g_cache_project_missing[(int)$p_project_id] = true;
 
 		if( $p_trigger_errors ) {
-			error_parameters( $p_project_id );
-			trigger_error( ERROR_PROJECT_NOT_FOUND, ERROR );
-		} else {
-			return false;
+			throw new ClientException( "Project #$p_project_id not found", ERROR_PROJECT_NOT_FOUND, array( $p_project_id ) );
 		}
+
+		return false;
 	}
 
 	$t_row = db_fetch_array( $t_result );