data mapper POC

[m6w6/pq-gateway] / lib / pq / Mapper / Property / Ref.php

diff --git a/lib/pq/Mapper/Property/Ref.php b/lib/pq/Mapper/Property/Ref.php
new file mode 100644 (file)
index 0000000..851df41
--- /dev/null
+++ b/lib/pq/Mapper/Property/Ref.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace pq\Mapper\Property;
+
+use pq\Gateway\Row;
+use pq\Mapper\Mapper;
+use pq\Mapper\RefProperty;
+use pq\Mapper\RefPropertyInterface;
+
+class Ref implements RefPropertyInterface
+{
+       use RefProperty;
+       
+       function __construct(Mapper $mapper, $property) {
+               $this->mapper = $mapper;
+               $this->property = $property;
+       }
+
+       function read(Row $row, $objectToUpdate) {
+               $val = $this->extract($objectToUpdate);
+               if (!isset($val)) {
+                       $map = $this->mapper->mapOf($this->refClass);
+                       $ref = $map->refOf($row, $this->refName, $objects)->current();
+                       $this->assign($objectToUpdate, current($objects));
+                       $map->map($ref);
+               }
+       }
+
+       function write($object, Row $rowToUpdate) {
+               $map = $this->mapper->mapOf($this->refClass);
+               $ref = $this->extract($object);
+               $rel = $map->relOf($this->container, $this->refName);
+               foreach ($rel as $fgn => $col) {
+                       foreach ($this->findFieldProperty($col) as $property) {
+                               $value = $property->extract($ref);
+                               $rowToUpdate->$fgn = $value;
+                       }
+               }
+       }
+
+       private function findFieldProperty($col) {
+               $map = $this->mapper->mapOf($this->refClass);
+               return array_filter($map->getProperties(), function($property) use($col) {
+                       return $property->exposes($col);
+               });
+       }
+
+
+       function read2(RowGateway $row) {
+               #echo __METHOD__." ".$this;
+               $map = $this->getRefMap();
+               $rel = $this->container->getGateway()->getRelation(
+                       $map->getGateway()->getName(), $this->refName);
+               $key = array_combine($rel->referencedColumns, array_map(function($c) use($row) {
+                       return $row->$c->get();
+               }, $rel->foreignColumns));
+               if (($obj = $this->mapper->objectOfRowId($this->refClass, $key))) {
+                       yield $this->property => $obj;
+               } else foreach ($map->getGateway()->by($row, $this->refName) as $row) {
+                       yield $this->property => $this->mapper->objectOf($this->refClass, $row);
+               }
+       }
+       
+       function write2($object) {
+               #echo __METHOD__." ".$this;
+               $map = $this->getRefMap();
+               $rel = $this->container->getGateway()->getRelation(
+                       $map->getGateway()->getName(), $this->refName);
+               $ref = $this->extract($object);
+               foreach ($rel as $fgn => $col) {
+                       $fld = $map->getFieldMapping($col);
+                       yield $fgn => $fld->extract($ref);
+               }
+       }
+} 
\ No newline at end of file