+ add basic support of extensions (can activate/deactivate in settings and load it) (experimental yet)

src/content/mytinytodo.js

@@ -590,11 +590,14 @@ var mytinytodo = window.mytinytodo = _mtt = {
 
 
         // Settings
-        $("a[data-settings-link]").click(function(event){
+        $(document).on('click', 'a[data-settings-link]', function(event) {
             var settingsPage = this.dataset.settingsLink;
             if (settingsPage == 'index') {
                 showSettings( (event.metaKey || event.ctrlKey) ? 1 : 0 );
             }
+            else if (settingsPage == 'ext-activate' || settingsPage == 'ext-deactivate') {
+                activateExtension(settingsPage == 'ext-activate' ? true : false, this.dataset.ext);
+            }
             return false;
         });
 
@@ -2631,6 +2634,19 @@ function saveSettings(frm)
     }, 'json');
 }
 
+function activateExtension(activate, ext)
+{
+    var params = {
+        'activate': activate ? 1 : 0,
+        'ext': ext
+    }
+    $.post(_mtt.mttUrl+'settings.php', params, function(json){
+        if(json.saved) {
+            flashInfo(_mtt.lang.get('settingsSaved'));
+            showSettings(0);
+        }
+    }, 'json');
+}
 
 /*
  *  Dialogs

src/includes/class.config.php

@@ -86,6 +86,9 @@ class Config
 
         # Appearance: system default or always light
         'appearance' => array('default'=>'system', 'type'=>'s', 'options'=>array('system','light')),
+
+        # Array of activated extensions
+        'extensions' => array('default'=>[], 'type'=>'a')
     );
 
     /** @var mixed[] */
@@ -193,8 +196,15 @@ class Config
             elseif ( isset($v['options']) && !in_array(self::$config[$param], $v['options'])) $val = $v['default'];
             else $val = self::$config[$param];
 
-            if ($v['type']=='i') $val = (int)$val;
-            else $val = strval($val);
+            if ($v['type'] == 'i') {
+                $val = (int)$val;
+            }
+            else if ($v['type'] == 'a') {
+                if (!is_array($val)) $val = [];
+            }
+            else {
+                $val = strval($val);
+            }
 
             $j[$param] = $val;
         }

src/includes/classes.php

@@ -0,0 +1,162 @@
+<?php declare(strict_types=1);
+
+/*
+    This file is a part of myTinyTodo.
+    (C) Copyright 2022 Max Pozdeev <maxpozdeev@gmail.com>
+    Licensed under the GNU GPL version 2 or any later. See file COPYRIGHT for details.
+*/
+
+class ApiRequest
+{
+    public $path;
+    public $method;
+    public $contentType;
+    public $jsonBody;
+
+    function __construct() {
+        $this->path = $_SERVER['PATH_INFO'] ?? '';
+        $this->method = isset($_SERVER['REQUEST_METHOD']) ? strtoupper($_SERVER['REQUEST_METHOD']) : 'GET';
+        $this->contentType = $_SERVER['CONTENT_TYPE'] ?? '';
+    }
+
+    function decodeJsonBody() {
+        $this->jsonBody = json_decode( file_get_contents('php://input'), true, 10, JSON_INVALID_UTF8_SUBSTITUTE );
+        return $this->jsonBody;
+    }
+}
+
+class ApiResponse
+{
+    public $data = null;
+    public $contentType = 'application/json';
+    public $code = null;
+
+    function htmlContent(string $content, int $code = 200): ApiResponse
+    {
+        $this->contentType = 'text/html';
+        $this->data = $content;
+        $this->code = $code;
+        return $this;
+    }
+
+    function  exit()
+    {
+        if (is_null($this->data) && is_null($this->code)) {
+            http_response_code(404);
+        }
+        if (!is_null($this->code)) {
+            http_response_code($this->code);
+        }
+        if ($this->contentType == 'text/html') {
+            print $this->data;
+            exit();
+        }
+        jsonExit($this->data);
+    }
+}
+
+abstract class ApiController
+{
+    /** @var ApiRequest */
+    protected $req;
+
+    /** @var ApiResponse */
+    protected $response;
+
+    function __construct(ApiRequest $req, ApiResponse $response) {
+        $this->req = $req;
+        $this->response = $response;
+    }
+}
+
+
+
+abstract class MTTExtension
+{
+    const codename = '';
+    const title = '';
+    abstract function init();
+}
+
+
+
+
+class MTTExtensionLoader
+{
+    private static $exts = [];
+
+    public static function loadExtension(string $ext)
+    {
+        if (isset(self::$exts[$ext])) {
+            error_log("Extension '$ext' is already registered");
+            return;
+        }
+
+        $loader = MTT_EXT. $ext. '/loader.php';
+        if (!file_exists($loader)) {
+            error_log("Failed to init extension '$ext': no loader.php");
+            return;
+        }
+
+        require_once(MTT_EXT. $ext. '/loader.php');
+        $getInstance = 'mtt_ext_'. $ext. '_instance';
+
+        if (!function_exists($getInstance)) {
+            throw new Exception("Failed to init extension '$ext': no '$getInstance' function");
+        }
+
+        $instance = $getInstance();
+        if ( ! ($instance instanceof MTTExtension) ) {
+            throw new Exception("Failed to init extension '$ext': incompatible instance");
+        }
+
+        $className = get_class($instance);
+        if (!defined("$className::codename") || !defined("$className::title")) {
+            throw new Exception("Failed to register extension '$ext': require class constants (codename, title)");
+        }
+        if ($instance::codename != $ext) {
+            throw new Exception("Extension '$ext' codename does not equal to extension dir");
+        }
+
+        $instance->init();
+        self::$exts[$ext] = $instance;
+    }
+
+    /**
+     * @return MTTExtension[]
+     */
+    public static function registeredExtensions(): array
+    {
+        $a = [];
+        foreach (self::$exts as $ext => $instance) {
+            $a[] = $instance;
+        }
+        return $a;
+    }
+
+    /**
+     * @return string[]
+     */
+    public static function bundles(): array
+    {
+        $a = [];
+        $files = array_diff(scandir(MTT_EXT) ?? [], ['.', '..']);
+        foreach ($files as $ext) {
+            if ( !is_dir(MTT_EXT. $ext) || !file_exists(MTT_EXT. $ext. '/loader.php') ) {
+                continue;
+            }
+            $a[] = $ext;
+        }
+        return $a;
+    }
+
+    public static function extensionInstance(string $ext): ?MTTExtension
+    {
+        return self::$exts[$ext] ?? null;
+    }
+
+    public static function isRegistered(string $ext): bool
+    {
+        return isset(self::$exts[$ext]);
+    }
+}

src/includes/common_classes.php

@@ -1,70 +0,0 @@
-<?php declare(strict_types=1);
-
-/*
-    This file is a part of myTinyTodo.
-    (C) Copyright 2022 Max Pozdeev <maxpozdeev@gmail.com>
-    Licensed under the GNU GPL version 2 or any later. See file COPYRIGHT for details.
-*/
-
-class ApiRequest
-{
-    public $path;
-    public $method;
-    public $contentType;
-    public $jsonBody;
-
-    function __construct() {
-        $this->path = $_SERVER['PATH_INFO'] ?? '';
-        $this->method = isset($_SERVER['REQUEST_METHOD']) ? strtoupper($_SERVER['REQUEST_METHOD']) : 'GET';
-        $this->contentType = $_SERVER['CONTENT_TYPE'] ?? '';
-    }
-
-    function decodeJsonBody() {
-        $this->jsonBody = json_decode( file_get_contents('php://input'), true, 10, JSON_INVALID_UTF8_SUBSTITUTE );
-        return $this->jsonBody;
-    }
-}
-
-class ApiResponse
-{
-    public $data = null;
-    public $contentType = 'application/json';
-    public $code = null;
-
-    function htmlContent(string $content, int $code = 200): ApiResponse
-    {
-        $this->contentType = 'text/html';
-        $this->data = $content;
-        $this->code = $code;
-        return $this;
-    }
-
-    function  exit()
-    {
-        if (is_null($this->data) && is_null($this->code)) {
-            http_response_code(404);
-        }
-        if (!is_null($this->code)) {
-            http_response_code($this->code);
-        }
-        if ($this->contentType == 'text/html') {
-            print $this->data;
-            exit();
-        }
-        jsonExit($this->data);
-    }
-}
-
-abstract class ApiController
-{
-    /** @var ApiRequest */
-    protected $req;
-
-    /** @var ApiResponse */
-    protected $response;
-
-    function __construct(ApiRequest $req, ApiResponse $response) {
-        $this->req = $req;
-        $this->response = $response;
-    }
-}

src/includes/lang/en.json

@@ -180,6 +180,9 @@
     "set_appearance": "Appearance",
     "set_appearance_system": "Same as system",
     "set_appearance_light": "Light theme",
+    "set_extensions": "Extensions",
+    "set_activate": "Activate",
+    "set_deactivate": "Deactivate",
     "confirmDelete": "Are you sure you want to delete the task?",
     "confirmLeave": "There can be unsaved data. Do you really want to leave?",
     "actionNoteSave": "save",

src/includes/lang/ru.json

@@ -180,6 +180,9 @@
     "set_appearance": "Тема оформления",
     "set_appearance_system": "Как в системе",
     "set_appearance_light": "Светлая",
+    "set_extensions": "Расширения",
+    "set_activate": "Активировать",
+    "set_deactivate": "Деактивировать",
     "confirmDelete": "Вы действительно хотите удалить задачу?",
     "confirmLeave": "На странице могут быть несохраненные данные. Вы действительно хотите закрыть страницу?",
     "actionNoteSave": "сохранить",

src/init.php

@@ -25,7 +25,7 @@ else {
 }
 
 require_once(MTTINC. 'common.php');
-require_once(MTTINC. 'common_classes.php');
+require_once(MTTINC. 'classes.php');
 require_once(MTTINC. 'version.php');
 require_once(MTTINC. 'class.dbconnection.php');
 require_once(MTTINC. 'class.dbcore.php');
@@ -58,6 +58,11 @@ if (need_auth() && !isset($dontStartSession)) {
     setup_and_start_session();
 }
 
+if (defined('MTT_ENABLE_EXT') && MTT_ENABLE_EXT) {
+    define('MTT_EXT', MTTPATH . 'ext/');
+    loadExtensions();
+}
+
 
 function requireConfig()
 {
@@ -340,3 +345,22 @@ function logAndDie($userText, $errText = null)
     }
     exit(1);
 }
+
+function loadExtensions()
+{
+    $a = Config::get('extensions');
+    if (!$a || !is_array($a)) {
+        return;
+    }
+    foreach ($a as $ext) {
+        if (is_string($ext)) {
+            try {
+                MTTExtensionLoader::loadExtension($ext);
+            }
+            catch (Exception $e) {
+                error_log($e->getMessage());
+            }
+
+        }
+    }
+}

src/settings.php

@@ -24,7 +24,7 @@ if(isset($_POST['save']))
     Config::set('lang', _post('lang'));
 
     // in Demo mode we can set only language by cookies
-    if(defined('MTTDEMO')) {
+    if (defined('MTTDEMO')) {
         setcookie('lang', Config::get('lang'), 0, url_dir(Config::get('url')=='' ? getRequestUri() : Config::getUrl('url')));
         $t['saved'] = 1;
         jsonExit($t);
@@ -56,6 +56,42 @@ if(isset($_POST['save']))
     $t['saved'] = 1;
     jsonExit($t);
 }
+else if (isset($_POST['activate']))
+{
+    check_token();
+
+    $t = array('saved'=>0);
+
+    // in Demo mode we do nothing
+    if (defined('MTTDEMO')) {
+        $t['saved'] = 1;
+        jsonExit($t);
+    }
+
+    $activate = (int)_post('activate');
+    $ext = _post('ext');
+
+    $exts = MTTExtensionLoader::bundles();
+    if (in_array($ext, $exts)) {
+        $a = Config::get('extensions');
+        if (!is_array($a)) $a = [];
+        if ($activate) {
+            try {
+                MTTExtensionLoader::loadExtension($ext);
+                $a[] = $ext;
+            }
+            catch (Exception $e) {
+                http_response_code(500);
+                logAndDie($e->getMessage());
+            }
+        }
+        else $a = array_diff($a, [$ext]);
+        Config::set('extensions', $a);
+        Config::save();
+    }
+    $t['saved'] = 1;
+    jsonExit($t);
+}
 
 function _c($key)
 {
@@ -144,6 +180,24 @@ function timezoneIdentifiers()
     return $a;
 }
 
+function listExtensions()
+{
+    $exts = MTTExtensionLoader::bundles();
+    $activatedExts = Config::get('extensions');
+    if (!is_array($activatedExts)) $activatedExts = [];
+    foreach ($exts as $ext) {
+        $out = "$ext ";
+        if (in_array($ext, $activatedExts)) {
+            $out .= "<a href='#' data-settings-link='ext-deactivate' data-ext='". htmlspecialchars($ext).  "'>". __('set_deactivate', true). '</a>';
+        }
+        else {
+            $out .= "<a href='#' data-settings-link='ext-activate' data-ext='". htmlspecialchars($ext). "'>". __('set_activate', true). '</a>';
+        }
+        $a[] = $out;
+    }
+    print( implode("<br>\n", $a) );
+}
+
 header('Content-type:text/html; charset=utf-8');
 ?>
 
@@ -283,6 +337,18 @@ header('Content-type:text/html; charset=utf-8');
 </div>
 </div>
 
+<?php
+    if (defined('MTT_ENABLE_EXT') && MTT_ENABLE_EXT) {
+?>
+<div class="tr">
+ <div class="th"><?php _e('set_extensions');?>:</div>
+ <div class="td"> <?php listExtensions(); ?>
+ </div>
+</div>
+<?php
+    }
+?>
+
 <div class="form-bottom-buttons">
   <button type="submit"><?php _e('set_submit'); ?></button>
   <button type="button" class="mtt-back-button"><?php _e('set_cancel'); ?></button>