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<?php namespace Arcanedev\LaravelNestedSet\Utilities; |
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use Arcanedev\LaravelNestedSet\Contracts\Nodeable; |
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use Arcanedev\LaravelNestedSet\NodeTrait; |
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use Illuminate\Database\Eloquent\ModelNotFoundException; |
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/** |
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* Class TreeHelper |
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* |
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* @package Arcanedev\LaravelNestedSet\Utilities |
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* @author ARCANEDEV <[email protected]> |
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*/ |
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class TreeHelper |
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{ |
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/* ------------------------------------------------------------------------------------------------ |
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| Main Functions |
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| ------------------------------------------------------------------------------------------------ |
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*/ |
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/** |
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* @param array $data |
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* @param array $existing |
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* @param \Arcanedev\LaravelNestedSet\Contracts\Nodeable $model |
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* @param bool $delete |
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* |
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* @return int |
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*/ |
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public static function rebuild(array $data, $existing, Nodeable $model, $delete = false) |
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{ |
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$dictionary = []; |
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self::rebuildDictionary($dictionary, $data, $existing, $model); |
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if ( ! empty($existing)) { |
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if ($delete) { |
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$model->newScopedQuery() |
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->whereIn($model->getKeyName(), array_keys($existing)) |
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->forceDelete(); |
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} |
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else { |
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foreach ($existing as $node) { |
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/** @var \Arcanedev\LaravelNestedSet\Contracts\Nodeable $node */ |
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$dictionary[$node->getParentId()][] = $node; |
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} |
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} |
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} |
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return self::fixNodes($dictionary); |
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} |
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/** |
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* Fix nodes. |
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* |
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* @param array $dictionary |
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* |
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* @return int |
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*/ |
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public static function fixNodes(array &$dictionary) |
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{ |
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$fixed = 0; |
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$cut = self::reorderNodes($dictionary, $fixed); |
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// Save nodes that have invalid parent as roots |
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while ( ! empty($dictionary)) { |
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$dictionary[null] = reset($dictionary); |
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unset($dictionary[key($dictionary)]); |
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$cut = self::reorderNodes($dictionary, $fixed, null, $cut); |
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} |
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return $fixed; |
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} |
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/* ------------------------------------------------------------------------------------------------ |
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| Other Functions |
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| ------------------------------------------------------------------------------------------------ |
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*/ |
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/** |
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* Rebuild the dictionary. |
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* |
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* @param array $dictionary |
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* @param array $data |
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* @param array $existing |
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* @param \Arcanedev\LaravelNestedSet\Contracts\Nodeable $model |
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* @param mixed $parentId |
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* |
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* @throws \Illuminate\Database\Eloquent\ModelNotFoundException |
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*/ |
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protected static function rebuildDictionary( |
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array &$dictionary, |
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array $data, |
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array &$existing, |
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Nodeable &$model, |
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$parentId = null |
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) { |
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$keyName = $model->getKeyName(); |
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foreach ($data as $itemData) { |
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if ( ! isset($itemData[$keyName])) { |
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$node = $model->newInstance(); |
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// We will save it as raw node since tree will be fixed |
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$node->rawNode(0, 0, $parentId); |
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} |
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elseif ( ! isset($existing[$key = $itemData[$keyName]])) { |
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throw new ModelNotFoundException; |
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} |
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else { |
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$node = $existing[$key]; |
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unset($existing[$key]); |
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} |
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$node->fill($itemData)->save(); |
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$dictionary[$parentId][] = $node; |
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if (isset($itemData['children'])) { |
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self::rebuildDictionary($dictionary, $itemData['children'], $existing, $model, $node->getKey()); |
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} |
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} |
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} |
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/** |
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* Reorder nodes. |
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* |
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* @param array $dictionary |
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* @param int $fixed |
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* @param int|null $parentId |
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* @param int $cut |
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* |
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* @return int |
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*/ |
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protected static function reorderNodes( |
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array &$dictionary, |
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&$fixed, |
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$parentId = null, |
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$cut = 1 |
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) { |
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if ( ! isset($dictionary[$parentId])) { |
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return $cut; |
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} |
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/** @var NodeTrait $model */ |
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foreach ($dictionary[$parentId] as $model) { |
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$lft = $cut; |
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$cut = self::reorderNodes($dictionary, $fixed, $model->getKey(), $cut + 1); |
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$rgt = $cut; |
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if ($model->rawNode($lft, $rgt, $parentId)->isDirty()) { |
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$model->save(); |
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$fixed++; |
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} |
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++$cut; |
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} |
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unset($dictionary[$parentId]); |
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return $cut; |
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} |
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} |
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|
ARCANEDEV /
LaravelNestedSet
