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<?php |
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namespace bultonFr\DependencyTree; |
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use \Exception; |
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class DependencyTree |
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{ |
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/** |
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* @var array $dependencies : List of dependency with there infos; |
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*/ |
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protected $dependencies = []; |
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/** |
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* Add a dependency to system |
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* |
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* @param string $name : Dependency's name |
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* @param int $order : Order to load dependency |
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* @param array $dependencies : All dependencies for this dependency |
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* |
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* @throws Exception : If dependency already declared |
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* |
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* @return DependencyTree : Current instance |
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*/ |
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public function addDependency($name, $order = 0, $dependencies = []) |
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{ |
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//Check if dependency is already declared. |
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if (isset($this->dependencies[$name])) { |
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throw new Exception('Dependency '.$name.' already declared.'); |
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} |
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if (!is_array($dependencies)) { |
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throw new Exception('Dependencies must be passed in a array.'); |
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} |
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$dependencyInfos = new \stdClass; |
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$dependencyInfos->order = (int) $order; |
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$dependencyInfos->dependencies = $dependencies; |
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$this->dependencies[$name] = $dependencyInfos; |
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return $this; |
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} |
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/** |
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* Generate the dependency tree |
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* |
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* @return array |
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*/ |
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public function generateTree() |
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{ |
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$firstTree = $this->generateOrderTree(); |
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$finalTree = $this->generateDependenciesTree($firstTree); |
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return $finalTree; |
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} |
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/** |
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* Generate the first tree. It's a order tree |
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* |
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* @return array : the order tree |
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*/ |
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protected function generateOrderTree() |
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{ |
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$tree = new Tree; |
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//add all dependency to the Tree |
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foreach ($this->dependencies as $dependencyName => $dependencyInfos) { |
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$tree->addDependency( |
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$dependencyName, |
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$dependencyInfos->order, |
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$dependencyInfos->dependencies |
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); |
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} |
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return $tree->generateTree(); |
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} |
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/** |
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* Generate the second tree. It's a dependency tree |
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* |
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* @param array $orderTree : The first tree |
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* |
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* @return array : The final tree |
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*/ |
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protected function generateDependenciesTree($orderTree) |
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{ |
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//Read the orderTree and generate a tree |
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//for each line of the first tree |
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foreach ($orderTree as $order => $dependencies) { |
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$tree = new Tree; |
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foreach ($dependencies as $dependencyName) { |
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$dependencyInfos = $this->dependencies[$dependencyName]; |
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$tree->addDependency( |
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$dependencyName, |
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-1, //Order negative because it's generate after |
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$dependencyInfos->dependencies |
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); |
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} |
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//Generate the order of dependencies from the depends |
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$tree->generateOrderFromDependencies(); |
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//Generate the tree for this line of the final tree |
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$orderTree[$order] = $tree->generateTree(); |
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} |
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return $orderTree; |
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} |
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} |
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bulton-fr /
dependency-tree
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