Add: Repository Criteria

README.md

@@ -14,6 +14,7 @@
 - Mock Object
 - Observer
 - Proxy
+- Repository Criteria
 - Singleton
 - State
 - Strategy

repositoryCriteria.php

@@ -0,0 +1,108 @@
+<?php
+
+class Builder
+{
+    private string $text = '';
+
+    public function buildStepA(string $param): void
+    {
+        $this->setText(__METHOD__, $param);
+    }
+
+    public function buildStepB(string $param): void
+    {
+        $this->setText(__METHOD__, $param);
+    }
+
+    public function getText(): string
+    {
+        return $this->text;
+    }
+
+    private function setText(string $methodName, string $param): void
+    {
+        $this->text .= $methodName . ' with ' . $param . '<br>';
+    }
+}
+
+interface CriterionInterface
+{
+    public function apply(Builder $builder): void;
+}
+
+class FirstCriterion implements CriterionInterface
+{
+    public function __construct(
+        private string $param
+    ) {
+    }
+
+    public function apply(Builder $builder): void
+    {
+        $builder->buildStepA($this->param);
+    }
+}
+
+class SecondCriterion implements CriterionInterface
+{
+    public function __construct(
+        private string $param
+    ) {
+    }
+
+    public function apply(Builder $builder): void
+    {
+        $builder->buildStepB($this->param);
+    }
+}
+
+class CriteriaApplier
+{
+    private array $criteria = [];
+
+    public function __construct(
+        private Builder $builder
+    ) {
+    }
+
+    public function addCriterion(CriterionInterface $criterion): void
+    {
+        $this->criteria[] = $criterion;
+    }
+
+    public function applyCriteriaAndGetText(): string
+    {
+        foreach ($this->criteria as $criterion) {
+            $criterion->apply($this->builder);
+        }
+
+        return $this->builder->getText();
+    }
+}
+
+class Repository
+{
+    public function __construct(
+        private CriteriaApplier $criteriaApplier
+    ) {
+    }
+
+    public function make(): string
+    {
+        $this->criteriaApplier->addCriterion(new FirstCriterion('paramA'));
+        $this->criteriaApplier->addCriterion(new SecondCriterion('paramB'));
+        $this->criteriaApplier->addCriterion(new FirstCriterion('paramC'));
+
+        return $this->criteriaApplier->applyCriteriaAndGetText();
+    }
+}
+
+/**
+ * Client
+ */
+
+$builder = new Builder();
+$criteriaApplier = new CriteriaApplier($builder);
+$repository = new Repository($criteriaApplier);
+
+echo $repository->make();