Add PartialTreeData action for AdjacencyList tree type - renders not …

…full tree but a part of it

src/actions/AdjacencyList/PartialTreeDataAction.php

@@ -0,0 +1,156 @@
+<?php
+
+namespace devgroup\JsTreeWidget\actions\AdjacencyList;
+
+use DevGroup\TagDependencyHelper\NamingHelper;
+use Yii;
+use yii\base\Action;
+use yii\base\InvalidConfigException;
+use yii\caching\TagDependency;
+use yii\helpers\ArrayHelper;
+use yii\web\Response;
+
+/**
+ * Helper action for retrieving tree data for jstree by ajax.
+ * Example use in controller:
+ *
+ * ``` php
+ * public function actions()
+ * {
+ *     return [
+ *         'getTree' => [
+ *             'class' => PartialTreeDataAction::class,
+ *             'className' => Category::class,
+ *             'modelLabelAttribute' => 'defaultTranslation.name',
+ *
+ *         ],
+ *     ...
+ *     ];
+ * }
+ * ```
+ */
+class PartialTreeDataAction extends Action
+{
+
+    public $className;
+
+    public $modelIdAttribute = 'id';
+
+    public $modelLabelAttribute = 'name';
+
+    public $modelParentAttribute = 'parent_id';
+
+    public $varyByTypeAttribute;
+
+    public $queryParentAttribute = 'id';
+
+    public $querySortOrder = 'sort_order';
+
+    public $querySelectedAttribute = 'selected_id';
+    /**
+     * Additional conditions for retrieving tree(ie. don't display nodes marked as deleted)
+     * @var array|\Closure
+     */
+    public $whereCondition = [];
+
+    /**
+     * Cache key prefix. Should be unique if you have multiple actions with different $whereCondition
+     * @var string|\Closure
+     */
+    public $cacheKey = 'PartialTree';
+
+    /**
+     * Cache lifetime for the full tree
+     * @var int
+     */
+    public $cacheLifeTime = 86400;
+
+    public function init()
+    {
+        if ($this->className === null) {
+            throw new InvalidConfigException('Model name should be set in controller actions');
+        }
+        if (!class_exists($this->className)) {
+            throw new InvalidConfigException('Model class does not exists');
+        }
+    }
+
+    public function run()
+    {
+        Yii::$app->response->format = Response::FORMAT_JSON;
+
+        /** @var \yii\db\ActiveRecord $class */
+        $class = $this->className;
+
+        if (null === $current_selected_id = Yii::$app->request->get($this->querySelectedAttribute)) {
+            $current_selected_id = Yii::$app->request->get($this->queryParentAttribute);
+        }
+
+        $parent_id = Yii::$app->request->get($this->queryParentAttribute, '#');
+        if (!is_numeric($parent_id)) {
+            $parent_id = 0;
+        }
+
+        $cacheKey = $this->cacheKey instanceof \Closure ? call_user_func($this->cacheKey) : $this->cacheKey;
+
+        $cacheKey = "AdjacencyFullTreeData:$cacheKey:{$class}:{$this->querySortOrder}:$parent_id";
+
+        if (false === $result = Yii::$app->cache->get($cacheKey)) {
+            $query = $class::find()
+                ->orderBy([$this->querySortOrder => SORT_ASC]);
+
+            if ($this->whereCondition instanceof \Closure) {
+                $query->where(call_user_func($this->whereCondition));
+            } elseif (count($this->whereCondition) > 0) {
+                $query->where($this->whereCondition);
+            }
+            $query->andWhere([$this->modelParentAttribute => $parent_id]);
+
+            if (null === $rows = $query->asArray()->all()) {
+                return [];
+            }
+
+            $result = [];
+
+            foreach ($rows as $row) {
+                $parent = ArrayHelper::getValue($row, $this->modelParentAttribute, 0);
+                $item = [
+                    'id' => ArrayHelper::getValue($row, $this->modelIdAttribute, 0),
+                    'parent' => $parent ?: '#',
+                    'text' => ArrayHelper::getValue($row, $this->modelLabelAttribute, 'item'),
+                    'a_attr' => [
+                        'data-id' => $row[$this->modelIdAttribute],
+                        'data-parent_id' => $row[$this->modelParentAttribute]
+                    ],
+                    'children' => true,
+                ];
+
+                if (null !== $this->varyByTypeAttribute) {
+                    $item['type'] = $row[$this->varyByTypeAttribute];
+                }
+
+                $result[$row[$this->modelIdAttribute]] = $item;
+            }
+
+            Yii::$app->cache->set(
+                $cacheKey,
+                $result,
+                86400,
+                new TagDependency([
+                    'tags' => [
+                        NamingHelper::getCommonTag($class),
+                    ],
+                ])
+            );
+        }
+
+        if (array_key_exists($current_selected_id, $result)) {
+            $result[$current_selected_id] = array_merge(
+                $result[$current_selected_id],
+                ['state' => ['opened' => true, 'selected' => true]]
+            );
+        }
+
+        return array_values($result);
+    }
+}

src/widgets/tree-input-src/styles.css

@@ -24,3 +24,7 @@
 .tree-input__tree-container_active {
   display: block;
 }
+.tree-input__selected-values {
+  line-height: 1.44;
+  padding: 6px 12px;
+}