StackSet class and test

Author: doganoo

src/Datastructure/Stackqueue/StackSet.php

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+<?php
+/**
+ * MIT License
+ *
+ * Copyright (c) 2018 Dogan Ucar
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+namespace doganoo\PHPAlgorithms\Datastructure\Stackqueue;
+
+use doganoo\PHPAlgorithms\Datastructure\Lists\ArrayLists\ArrayList;
+
+/**
+ * Class StackSet
+ *
+ * @package doganoo\PHPAlgorithms\Datastructure\Stackqueue
+ */
+class StackSet {
+    private $maxSize = 0;
+    private $counter = 0;
+    private $stackList = null;
+
+    public function __construct(int $maxSize = 128) {
+        $this->maxSize = $maxSize;
+        $this->stackList = new ArrayList();
+    }
+
+    public function push($element) {
+        $stack = $this->getLastStack();
+        $this->addToStack($stack, $element);
+    }
+
+    private function getLastStack(): Stack {
+        $modulo = $this->counter % $this->maxSize;
+        if (0 === $modulo) {
+            return new Stack();
+        }
+        $index = $this->stackList->length();
+        $stack = $this->stackList->get($index - 1);
+        return $stack;
+    }
+
+    private function addToStack(Stack $stack, $element) {
+        $stack->push($element);
+        $this->counter++;
+        if (1 === $stack->stackSize()) {
+            $this->stackList->add($stack);
+        } else {
+            $index = $this->stackList->length();
+            $this->stackList->set($index - 1, $stack);
+        }
+    }
+
+    public function pop() {
+        $index = $this->stackList->length();
+        /** @var Stack $stack */
+        $stack = $this->stackList->get($index - 1);
+        $element = $stack->peek();
+        $this->counter--;
+        if (0 === $stack->stackSize()) {
+            $this->stackList->remove($index - 1);
+        } else {
+            $this->stackList->set($index - 1, $stack);
+        }
+        return $element;
+    }
+
+    public function stackCount(): int {
+        return $this->stackList->length();
+    }
+
+}

tests/StackQueue/StackSetTest.php

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+<?php
+
+
+namespace StackQueue;
+
+
+use doganoo\PHPAlgorithms\Datastructure\Stackqueue\StackSet;
+
+class StackSetTest extends \PHPUnit\Framework\TestCase {
+    public function testStackSet() {
+        $stackSet = new StackSet(2);
+        $stackSet->push("Hallo");
+        $stackSet->push("Hallo 2");
+        $this->assertTrue($stackSet->stackCount() === 1);
+        $stackSet->push("Hallo 3");
+        $this->assertTrue($stackSet->stackCount() === 2);
+        $element = $stackSet->pop();
+        $this->assertTrue($element === "Hallo 3");
+        $this->assertTrue($stackSet->stackCount() === 1);
+    }
+}