+ can do some actions in extension settings page

src/api.php

@@ -60,6 +60,20 @@ $endpoints = array(
     ]
 );
 
+// look for extensions
+foreach (MTTExtensionLoader::registeredExtensions() as $instance) {
+    if ($instance instanceof MTTHttpApiExtender) {
+        $newRoutes = $instance->extendHttpApi();
+        foreach ($newRoutes as $endpoint => $methods) {
+            $endpoint = '/ext/'. $instance::codename. $endpoint;
+            foreach ($methods as $k => &$v) {
+                $v[2] = true; // Mark extension method
+            }
+            $endpoints[$endpoint] = $methods;
+        }
+    }
+}
+
 $req = new ApiRequest();
 $response = new ApiResponse();
 $executed = false;
@@ -73,12 +87,16 @@ foreach ($endpoints as $search => $methods) {
         if ( is_null($classDescr) ) {
             $response->htmlContent("Unknown method for resource", 500)->exit();
         }
-        if ( !is_array($classDescr) || count($classDescr) != 2) {
+        if ( !is_array($classDescr) || count($classDescr) < 2) {
             $response->htmlContent("Incorrect method definition", 500)->exit();
         }
         // check if class method exists
         $class = $classDescr[0];
         $classMethod = $classDescr[1];
+        $isExt = $classDescr[2] ?? false;
+        if ($isExt) {
+            checkWriteAccess();
+        }
         $param = null;
         if (count($m) >= 2) {
             $param = $m[1];

src/content/mytinytodo.js

@@ -626,6 +626,11 @@ var mytinytodo = window.mytinytodo = _mtt = {
             }
         });
 
+        $("#page_ajax").on('click', 'a[data-ext-settings-action]', function() {
+            extensionSettingsAction(this.dataset.extSettingsAction, this.dataset.ext);
+            return false;
+        });
+
 
         // tab menu
         this.addAction('listSelected', tabmenuOnListSelected);
@@ -2684,7 +2689,30 @@ function saveExtensionSettings(frm)
                     flashInfo(json.msg);
                 });
                 else showExtensionSettings(ext);
+            }
+        }
+    });
+}
 
+function extensionSettingsAction(actionString, ext)
+{
+    if (actionString === undefined || ext === undefined) return false;
+    var a = actionString.split(':', 2);
+    if (a.length !== 2) return false;
+    var method = a[0],
+        action = a[1];
+    $.ajax({
+        url: _mtt.apiUrl + 'ext/' + ext + '/' + action,
+        method: method.toUpperCase(),
+        contentType : 'application/json',
+        data: '{}',
+        dataType: 'json',
+        success: function(json) {
+            if (json.total && json.total > 0) {
+                showExtensionSettings(ext, json.msg ? function(){flashInfo(json.msg)} : null);
+            }
+            else if (json.msg) {
+                flashInfo(json.msg);
             }
         }
     });

src/includes/api/ExtSettingsController.php

@@ -9,6 +9,8 @@ class ExtSettingsController extends ApiController {
      */
     function get($ext)
     {
+        checkWriteAccess();
+
         /** @var MTTExtension|MTTExtensionSettingsInterface $instance */
         $instance = $this->extInstance($ext);
         if (!$instance) {
@@ -45,6 +47,8 @@ EOD;
      */
     function put($ext)
     {
+        checkWriteAccess();
+
         /** @var MTTExtension|MTTExtensionSettingsInterface $instance */
         $instance = $this->extInstance($ext);
         if (!$instance) {

src/includes/classes.php

@@ -78,6 +78,10 @@ abstract class MTTExtension
     abstract function init();
 }
 
+interface MTTHttpApiExtender
+{
+    function extendHttpApi(): array;
+}
 
 interface MTTExtensionSettingsInterface
 {