Relationships

common/Alias/Model.php

@@ -143,4 +143,10 @@ abstract class Model extends BaseModel implements ModelInterface {
   public function jsonSerialize() {
     return $this->toArray();
   }
+
+  public function setRelationship(string $class_name): Relationship {
+    return (new Relationship)
+      ->setFactory($this->container->get('model'))
+      ->setStart($class_name);
+  }
 }

src/Relationship.php

@@ -8,26 +8,52 @@ class Relationship {
   protected $start;
   protected $nodes;
 
-  public function __construct(string $class_name) {
-    $this->setStart($class_name);
+  public function __construct(string $class_name = '') {
+    if ($class_name != '') {
+      $this->setStart($class_name);
+    }
   }
-  public function setStart(string $class_name) {
+  public function setStart(string $class_name): Relationship {
     $this->start = (object) [
       'class' => $class_name,
       'table' => Model::getTable($class_name)
     ];
+    return $this;
   }
-  public function addNode(RelationNode $node) {
+  protected $factory;
+  public function setFactory(ModelFactory $factory): Relationship {
+    $this->factory = $factory;
+    return $this;
+  }
+  public function with(string $from_class, string $from_key, string $to_class, string $to_key): Relationship {
+    $node = (new RelationNode())
+      ->setSource($from_class, $from_key)
+      ->setDestination($to_class, $to_key);
     if ($this->nodes === null) {
       $this->nodes = [];
     }
     $this->nodes []= $node;
+    return $this;
   }
-  public function build(ModelFactory $factory): ModelFactory {
+  protected $condition;
+  public function setCondition(string $class_name, string $key, $value): Relationship {
+    $this->condition = (object) [
+      'class' => $class_name,
+      'table' => Model::getTable($class_name),
+      'key' => $key,
+      'value' => $value
+    ];
+    return $this;
+  }
+  public function build(): ModelFactory {
     $output = $factory->find($this->start->class);
     foreach ($this->nodes as $node) {
-      $output = $node->build($factory);
+      $output = $node->build($output);
     }
+    $output = $output->where([
+      implode('.', [$this->condition->table, $this->condition->key]),
+      $this->condition->value
+    ]);
     return $output;
   }
 }