Bubbling up of parent scope in template blocks with inheritance chain

CHANGELOG.md

@@ -7,10 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Fixed
+- Updating variable in parent scope (when the `scope=parent` is explicitly used on a tag like `assign`) now bubbles up (to the including template) even when the included template is part of an inheritance chain as it did pre `v3.1.28`.
 - `$smarty->muteUndefinedOrNullWarnings()` now also mutes PHP7 notices for undefined array indexes [#736](https://github.com/smarty-php/smarty/issues/736)
 - `$smarty->muteUndefinedOrNullWarnings()` now treats undefined vars and array access of a null or false variables 
   equivalent across all supported PHP versions
 - `$smarty->muteUndefinedOrNullWarnings()` now allows dereferencing of non-objects accross all supported PHP versions [#831](https://github.com/smarty-php/smarty/issues/831)
+
 ## [4.3.0] - 2022-11-22
 
 ### Added

libs/sysplugins/smarty_internal_method_configload.php

@@ -89,11 +89,10 @@ public function _loadConfigVars(Smarty_Internal_Template $tpl, $new_config_vars)
                 }
             }
             if ($tpl->parent->_isTplObj() && ($tagScope || $tpl->parent->scope)) {
-                $mergedScope = $tagScope | $tpl->scope;
-                if ($mergedScope) {
+                if ($tagScope | $tpl->scope) {
                     // update scopes
                     /* @var \Smarty_Internal_Template|\Smarty|\Smarty_Internal_Data $ptr */
-                    foreach ($tpl->smarty->ext->_updateScope->_getAffectedScopes($tpl->parent, $mergedScope) as $ptr) {
+                    foreach ($tpl->smarty->ext->_updateScope->_getAffectedScopes($tpl->parent, $tagScope) as $ptr) {
                         $this->_assignConfigVars($ptr->config_vars, $tpl, $new_config_vars);
                         if ($tagScope && $ptr->_isTplObj() && isset($tpl->_cache[ 'varStack' ])) {
                             $this->_updateVarStack($tpl, $new_config_vars);

libs/sysplugins/smarty_internal_runtime_updatescope.php

@@ -31,7 +31,7 @@ public function _updateScope(Smarty_Internal_Template $tpl, $varName, $tagScope
                 Smarty::$global_tpl_vars[ $varName ] = $tpl->tpl_vars[ $varName ];
             }
             // update scopes
-            foreach ($this->_getAffectedScopes($tpl, $mergedScope) as $ptr) {
+            foreach ($this->_getAffectedScopes($tpl, $tagScope) as $ptr) {
                 $this->_updateVariableInOtherScope($ptr->tpl_vars, $tpl, $varName);
                 if ($tagScope && $ptr->_isTplObj() && isset($tpl->_cache[ 'varStack' ])) {
                     $this->_updateVarStack($ptr, $varName);
@@ -44,16 +44,29 @@ public function _updateScope(Smarty_Internal_Template $tpl, $varName, $tagScope
      * Get array of objects which needs to be updated  by given scope value
      *
      * @param Smarty_Internal_Template $tpl
-     * @param int                      $mergedScope merged tag and template scope to which bubble up variable value
+     * @param int                      $tagScope tag scope to which bubble up variable value
      *
      * @return array
      */
-    public function _getAffectedScopes(Smarty_Internal_Template $tpl, $mergedScope)
+    public function _getAffectedScopes(Smarty_Internal_Template $tpl, $tagScope)
     {
+        $mergedScope = $tagScope | $tpl->scope;
         $_stack = array();
         $ptr = $tpl->parent;
         if ($mergedScope && isset($ptr) && $ptr->_isTplObj()) {
             $_stack[] = $ptr;
+            if ($tpl->inheritance && $tagScope & Smarty::SCOPE_PARENT) {
+                $inheritanceRoot = $tpl;
+                while ($inheritanceRoot->inheritance && $inheritanceRoot->parent
+                    && $inheritanceRoot->parent->inheritance === $inheritanceRoot->inheritance
+                    && $inheritanceRoot->parent->_isTplObj()
+                ) {
+                    $inheritanceRoot = $inheritanceRoot->parent;
+                }
+                if ($inheritanceRoot->parent && $inheritanceRoot->parent !== $ptr) {
+                    $_stack[] = $inheritanceRoot->parent;
+                }
+            }
             $mergedScope = $mergedScope & ~Smarty::SCOPE_PARENT;
             if (!$mergedScope) {
                 // only parent was set, we are done

tests/UnitTests/TemplateSource/X_Scopes/ScopeTest.php

@@ -238,7 +238,16 @@ public function dataTestIncludeScope()
                            '', $i ++), array('{include \'test_scope_assign_noscope.tpl\' scope=root}', true,
                                              '#test_scope_assign_noscope.tpl:$foo =\'newvar\'#testIncludeScope_' . $i .
                                              '.tpl:$foo =\'data\'#test_scope.tpl:$foo =\'data\'#data:$foo =\'data\'#Smarty:$foo =\'smarty\'#global:$foo =\'global\'',
-                                             '', $i ++),);
+                                             '', $i ++),
+                     array('{include \'test_scope_inheritance_include.tpl\'}', true,
+                           '#test_scope_inheritance_include.tpl:$foo =\'data\'#testIncludeScope_'. $i .
+                           '.tpl:$foo =\'data\'#test_scope.tpl:$foo =\'data\'#data:$foo =\'data\'#Smarty:$foo =\'smarty\'#global:$foo =\'global\'',
+                           '', $i ++),
+                     array('{include \'test_scope_inheritance_include_assign_parent.tpl\'}', true,
+                           '#test_scope_inheritance_include_assign_parent.tpl:$foo =\'parent\'#testIncludeScope_'. $i .
+                           '.tpl:$foo =\'data\'#test_scope.tpl:$foo =\'data\'#data:$foo =\'data\'#Smarty:$foo =\'smarty\'#global:$foo =\'global\'',
+                           '', $i ++)
+        );
     }
 
     /**

tests/UnitTests/TemplateSource/X_Scopes/templates/test_scope_inheritance_child.tpl

@@ -0,0 +1 @@
+{extends './test_scope_inheritance_parent.tpl'}

tests/UnitTests/TemplateSource/X_Scopes/templates/test_scope_inheritance_child_assign_parent.tpl

@@ -0,0 +1 @@
+{extends './test_scope_inheritance_parent_assign_parent.tpl'}

tests/UnitTests/TemplateSource/X_Scopes/templates/test_scope_inheritance_include.tpl

@@ -0,0 +1 @@
+{include './test_scope_inheritance_child.tpl'}{checkvar var=foo}

tests/UnitTests/TemplateSource/X_Scopes/templates/test_scope_inheritance_include_assign_parent.tpl

@@ -0,0 +1 @@
+{include './test_scope_inheritance_child_assign_parent.tpl'}{checkvar var=foo}

tests/UnitTests/TemplateSource/X_Scopes/templates/test_scope_inheritance_parent.tpl

@@ -0,0 +1 @@
+{$foo = 'parent'}

tests/UnitTests/TemplateSource/X_Scopes/templates/test_scope_inheritance_parent_assign_parent.tpl

@@ -0,0 +1 @@
+{$foo = 'parent' scope=parent}