Add support for client-rendered widgets

CHANGELOG.md

@@ -6,6 +6,9 @@ The Product Changelog at **[matomo.org/changelog](https://matomo.org/changelog)*
 
 ## Matomo 5.10.0
 
+### New APIs
+* Widgets can now be declared as client-rendered through `WidgetConfig::setClientSideComponent()` and `WidgetConfig::setClientSideProps()`. `API.getWidgetMetadata` and `API.getReportPagesMetadata` now expose a `clientComponent` field for these widgets, and Widgetize/dashboard rendering supports bootstrapping them without an extra widget controller request.
+
 ### Deprecations
 * The methods `ArchiveTableCreator::getNumericTable()` and `ArchiveTableCreator::getBlobTable()` now support a `$createIfMissing` parameter. Omitting this parameter is deprecated; pass `true` to create missing archive tables or `false` to return only existing tables. In Matomo 6 the default behavior for omitted calls will change to lookup-only.
 

core/Widget/WidgetConfig.php

@@ -27,6 +27,8 @@ class WidgetConfig
     protected $action = '';
     protected $parameters = array();
     protected $middlewareParameters = array();
+    protected $clientSideComponent = array();
+    protected $clientSideProps = array();
     protected $name   = '';
     protected $order  = 99;
     protected $isEnabled = true;
@@ -124,6 +126,10 @@ public function getAction()
      * Sets (overwrites) the parameters of the widget. These parameters will be added to the URL when rendering the
      * widget. You can access these parameters via `Piwik\Common::getRequestVar(...)`.
      *
+     * This applies to widgets rendered through their controller/action request. Client-rendered widgets do not receive
+     * these parameters automatically and should instead derive request state from the browser context or load data via
+     * API requests.
+     *
      * @param array $parameters eg. ('urlparam' => 'urlvalue')
      * @return static
      */
@@ -137,6 +143,9 @@ public function setParameters($parameters)
     /**
      * Add new parameters and only overwrite parameters that have the same name. See {@link setParameters()}
      *
+     * Like {@link setParameters()}, these parameters are only used for widgets rendered through their
+     * controller/action request and are not forwarded automatically to client-rendered widgets.
+     *
      * @param  array $parameters eg. ('urlparam' => 'urlvalue')
      * @return static
      */
@@ -352,6 +361,64 @@ public function getMiddlewareParameters()
         return $this->middlewareParameters;
     }
 
+    /**
+     * Marks this widget as client-rendered by a Vue component exported by the given plugin bundle.
+     *
+     * Client-rendered widgets do not execute the widget controller/action in a separate request before rendering.
+     * They should derive dynamic state from the current browser request or load data through API requests instead.
+     *
+     * @param string $plugin eg 'Transitions'
+     * @param string $component eg 'TransitionsPage'
+     * @return static
+     * @since 5.10.0
+     */
+    public function setClientSideComponent(string $plugin, string $component)
+    {
+        $this->clientSideComponent = array(
+            'plugin' => $plugin,
+            'name'   => $component,
+        );
+
+        return $this;
+    }
+
+    /**
+     * Returns the configured client-rendered component definition.
+     * @return array{}|array{plugin: string, name: string}
+     * @since 5.10.0
+     */
+    public function getClientSideComponent(): array
+    {
+        return $this->clientSideComponent;
+    }
+
+    /**
+     * Sets static props that should be passed to the client-rendered Vue widget.
+     *
+     * Use this for configuration known when the widget is registered. Request-specific widget parameters are not
+     * forwarded to client-rendered widgets through this mechanism.
+     *
+     * @param array $props
+     * @return static
+     * @since 5.10.0
+     */
+    public function setClientSideProps(array $props)
+    {
+        $this->clientSideProps = $props;
+
+        return $this;
+    }
+
+    /**
+     * Returns props configured for the client-rendered Vue widget.
+     * @return array
+     * @since 5.10.0
+     */
+    public function getClientSideProps(): array
+    {
+        return $this->clientSideProps;
+    }
+
     /**
      * Marks this widget as a "wide" widget that requires the full width.
      *

plugins/API/WidgetMetadata.php

@@ -116,6 +116,17 @@ public function buildWidgetMetadata(WidgetConfig $widget, $categoryList = null,
             $item['middlewareParameters'] = $middleware;
         }
 
+        $clientComponent = $widget->getClientSideComponent();
+
+        if (!empty($clientComponent)) {
+            $item['clientComponent'] = $clientComponent;
+
+            $clientProps = $widget->getClientSideProps();
+            if (!empty($clientProps)) {
+                $item['clientComponent']['props'] = $clientProps;
+            }
+        }
+
         if ($widget instanceof ReportWidgetConfig) {
             $item['viewDataTable'] = $widget->getViewDataTable();
             $item['isReport'] = true;

plugins/API/tests/Unit/WidgetMetadataTest.php

@@ -114,6 +114,20 @@ public function testBuildWidgetMetadataShouldAddOptionalMiddlewareParameters()
         $this->assertSame(array('module' => 'Goals', 'action' => 'hasAnyConversions'), $metadata['middlewareParameters']);
     }
 
+    public function testBuildWidgetMetadataShouldAddOptionalClientComponent()
+    {
+        $config = $this->createWidgetConfig('Test', 'CategoryId', 'SubcategoryId');
+        $config->setClientSideComponent('Transitions', 'TransitionsPage');
+        $config->setClientSideProps(array('foo' => 'bar'));
+        $metadata = $this->metadata->buildWidgetMetadata($config);
+
+        $this->assertSame(array(
+            'plugin' => 'Transitions',
+            'name' => 'TransitionsPage',
+            'props' => array('foo' => 'bar'),
+        ), $metadata['clientComponent']);
+    }
+
     public function testBuildWidgetMetadataShouldAddReportInformtionIfReportWidgetConfigGiven()
     {
         $config = new ReportWidgetConfig();