Add complex page link handling to ComponentBase

modules/cms/classes/CmsObject.php

@@ -152,6 +152,9 @@ class CmsObject implements ArrayAccess
         if (!FileHelper::validatePath($fileName, static::getMaxAllowedPathNesting()))
             throw new SystemException(Lang::get('cms::lang.cms_object.invalid_file', ['name'=>$fileName]));
 
+        if (!strlen(File::extension($fileName)))
+            $fileName .= '.htm';
+
         $fullPath = static::getFilePath($theme, $fileName);
 
         if (!File::isFile($fullPath))

modules/cms/classes/ComponentBase.php

@@ -54,6 +54,11 @@ abstract class ComponentBase extends Extendable
      */
     protected $page;
 
+    /**
+     * @var array Cache of linked Component objects, used for page links.
+     */
+    protected $pageLinkCache = [];
+
     /**
      * Component constructor. Takes in the page or layout code section object
      * and properties set by the page or layout.
@@ -146,4 +151,37 @@ abstract class ComponentBase extends Extendable
 
         return $value;
     }
+
+    /**
+     * Creates a page link to another page. Allows mapping to the other page's
+     * component properties for the purpose of extracting URL routing parameters.
+     * @param  string $page  Page name or page file name
+     * @param  string $class Component class name
+     * @param  array $mappings ['componentProperty' => 'routed value']
+     * @return string
+     */
+    protected function makePageLink($page, $class, $mappings = [])
+    {
+        if (!isset($this->pageLinkCache[$page.$class])) {
+            $this->pageLinkCache[$page.$class] = $this->getOtherPageComponent($page, $class);
+        }
+
+        if (!$component = $this->pageLinkCache[$page.$class])
+            return null;
+
+        $params = [];
+        foreach ($mappings as $property => $value) {
+
+            if (!$param = $component->property($property))
+                continue;
+
+            if (substr($param, 0, 1) == ':')
+                $param = substr($param, 1);
+
+            $params[$param] = $value;
+        }
+
+        return $this->pageUrl($page, $params);
+    }
+
 }

modules/cms/classes/ComponentManager.php

@@ -162,7 +162,7 @@ class ComponentManager
     public function hasComponent($name)
     {
         $className = $this->resolve($name);
-        if (!$className) 
+        if (!$className)
             return false;
 
         return isset($this->classMap[$className]);