From a3113ed1955bdae2ba88e542245a91aa7a8b2718 Mon Sep 17 00:00:00 2001
From: maxpozdeev <maxpozdeev@gmail.com>
Date: Sat, 9 Sep 2023 17:31:26 +0300
Subject: [PATCH] * add filter action for smart syntax parser

---
 src/includes/api/TasksController.php |  9 ++-
 src/includes/filters.php             | 84 ++++++++++++++++++++++++++++
 src/init.php                         |  1 +
 3 files changed, 91 insertions(+), 3 deletions(-)
 create mode 100644 src/includes/filters.php

diff --git a/src/includes/api/TasksController.php b/src/includes/api/TasksController.php
index 32e0f1a..6c8289c 100644
--- a/src/includes/api/TasksController.php
+++ b/src/includes/api/TasksController.php
@@ -241,9 +241,9 @@ class TasksController extends ApiController {
         );
         if (Config::get('smartsyntax') != 0 && (false !== $a = $this->parseSmartSyntax($t['title'])))
         {
-            $t['title'] = $a['title'];
-            $t['prio'] = $a['prio'];
-            $t['tags'] = $a['tags'];
+            $t['title'] = (string) $a['title'];
+            $t['prio'] = (int) $a['prio'];
+            $t['tags'] = (string) $a['tags'];
         }
         $this->response->data = $t;
     }
@@ -803,6 +803,9 @@ class TasksController extends ApiController {
         if (count($tags) > 0) {
             $a['tags'] = implode( ',' , $tags );
         }
+
+        do_filter('parseSmartSyntax', $title, $a);
+
         return $a;
     }
 
diff --git a/src/includes/filters.php b/src/includes/filters.php
new file mode 100644
index 0000000..276f892
--- /dev/null
+++ b/src/includes/filters.php
@@ -0,0 +1,84 @@
+<?php declare(strict_types=1);
+
+/*
+    This file is a part of myTinyTodo.
+    (C) Copyright 2023 Max Pozdeev <maxpozdeev@gmail.com>
+    Licensed under the GNU GPL version 2 or any later. See file COPYRIGHT for details.
+*/
+
+class MTTFilterCenter
+{
+    private static $filters = [];
+
+    public static function addFilterCallbackForAction(string $action, callable $callback): bool
+    {
+        if (!isset(self::$filters[$action])) {
+            self::$filters[$action] = [];
+        }
+        if (!in_array($callback, self::$filters[$action])) {
+            // do not duplicate same callback
+            self::$filters[$action][] = $callback;
+            return true;
+        }
+        return false;
+    }
+
+
+    public static function addFilterForAction(string $action, MTTFilterInterface $filter): bool
+    {
+        if (!isset(self::$filters[$action])) {
+            self::$filters[$action] = [];
+        }
+        if (!in_array($filter, self::$filters[$action])) {
+            // do not duplicate same filter
+            self::$filters[$action][] = $filter;
+            return true;
+        }
+        return false;
+    }
+
+
+    public static function hasFiltersForAction(string $action): bool
+    {
+        if (isset(self::$filters[$action]) && count(self::$filters[$action]) > 0) {
+            return true;
+        }
+        return false;
+    }
+
+
+    public static function filter(string $action, $in, &$out): bool
+    {
+        if (!isset(self::$filters[$action]) || count(self::$filters[$action]) == 0) {
+            return false;
+        }
+        foreach (self::$filters[$action] as $filter) {
+            if ($filter instanceof MTTFilterInterface) {
+                $filter->filter($in, $out);
+            }
+            else {
+                $filter($in, $out);
+            }
+        }
+        return true;
+    }
+}
+
+interface MTTFilterInterface
+{
+    function filter($in, &$out);
+}
+
+function add_filter(string $action, MTTFilterInterface $filter) {
+    MTTFilterCenter::addFilterForAction($action, $filter);
+}
+
+function add_filter_callback(string $action, callable $callback) {
+    MTTFilterCenter::addFilterCallbackForAction($action, $callback);
+}
+
+function do_filter(string $action, $in, &$out): bool {
+    return MTTFilterCenter::filter($action, $in, $out);
+}
+
+
diff --git a/src/init.php b/src/init.php
index 5ccfa81..1299ef1 100644
--- a/src/init.php
+++ b/src/init.php
@@ -40,6 +40,7 @@ require_once(MTTINC. 'class.dbconnection.php');
 require_once(MTTINC. 'class.dbcore.php');
 require_once(MTTINC. 'class.config.php');
 require_once(MTTINC. 'notifications.php');
+require_once(MTTINC. 'filters.php');
 
 configureDbConnection();