From 25b8b59719cd3189047f7b4d61978fe42192af73 Mon Sep 17 00:00:00 2001
From: Petr Kessler <kesspess@gmail.com>
Date: Sat, 21 Oct 2023 23:50:40 +0200
Subject: [PATCH] added Vector

---
 Simplex/Math/Vector.php | 63 ++++++++++++++++++++++++++++++++++++
 Simplex/exceptions.php  | 11 +++++++
 Simplex/simplex.php     |  1 +
 tests/VectorTest.php    | 71 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 146 insertions(+)
 create mode 100644 Simplex/Math/Vector.php
 create mode 100644 tests/VectorTest.php

diff --git a/Simplex/Math/Vector.php b/Simplex/Math/Vector.php
new file mode 100644
index 0000000..beef509
--- /dev/null
+++ b/Simplex/Math/Vector.php
@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types = 1);
+
+/**
+ * This file is part of the SimplexCalculator library
+ *
+ * Copyright (c) 2014 Petr Kessler (https://kesspess.cz)
+ *
+ * @license  MIT
+ * @link     https://github.com/uestla/Simplex-Calculator
+ */
+
+namespace Simplex\Math;
+
+use Simplex\EmptyVectorException;
+
+
+final class Vector implements \Countable
+{
+
+	/** @var Fraction[] $values */
+	private readonly array $values;
+
+	private readonly int $size;
+
+
+	/** @param  array<int, Fraction|string|int|float> $values */
+	public function __construct(array $values)
+	{
+		if ($values === []) {
+			throw new EmptyVectorException;
+		}
+
+		$this->values = array_map(static function ($value): Fraction {
+			return Fraction::create($value);
+
+		}, array_values($values));
+
+		$this->size = count($this->values);
+	}
+
+
+	/** @param  Vector|array<int, Fraction|string|int|float> $values */
+	public static function create(self|array $values): self
+	{
+		return $values instanceof self ? $values : new self($values);
+	}
+
+
+	/** @return Fraction[] */
+	public function toArray(): array
+	{
+		return $this->values;
+	}
+
+
+	public function count(): int
+	{
+		return $this->size;
+	}
+
+}
diff --git a/Simplex/exceptions.php b/Simplex/exceptions.php
index 5754356..6561ca0 100644
--- a/Simplex/exceptions.php
+++ b/Simplex/exceptions.php
@@ -58,5 +58,16 @@ public function __construct()
 }
 
 
+final class EmptyVectorException extends SimplexException
+{
+
+	public function __construct()
+	{
+		parent::__construct('Vector must have at least one value.');
+	}
+
+}
+
+
 abstract class SimplexException extends \Exception
 {}
diff --git a/Simplex/simplex.php b/Simplex/simplex.php
index cd3931f..d22439b 100644
--- a/Simplex/simplex.php
+++ b/Simplex/simplex.php
@@ -17,3 +17,4 @@
 require_once __DIR__ . '/exceptions.php';
 require_once __DIR__ . '/Math/math.php';
 require_once __DIR__ . '/Math/Fraction.php';
+require_once __DIR__ . '/Math/Vector.php';
diff --git a/tests/VectorTest.php b/tests/VectorTest.php
new file mode 100644
index 0000000..16a2476
--- /dev/null
+++ b/tests/VectorTest.php
@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Simplex\Tests;
+
+use Tester\Assert;
+use Tester\TestCase;
+use Simplex\Math\Vector;
+use Simplex\Math\Fraction;
+use Simplex\EmptyVectorException;
+
+
+require_once __DIR__ . '/bootstrap.php';
+
+
+final class VectorTest extends TestCase
+{
+
+	/**
+	 * @param  array<int|float|string|Fraction> $values
+	 * @param  Fraction[] $expectedValues
+	 * @dataProvider provideCreationData
+	 */
+	public function testCreation(array $values, array $expectedValues, int $expectedCount): void
+	{
+		$vectorConstructor = new Vector($values);
+		Assert::equal($expectedValues, $vectorConstructor->toArray());
+		Assert::count($expectedCount, $vectorConstructor);
+
+		$vectorFactory = Vector::create($values);
+		Assert::equal($expectedValues, $vectorFactory->toArray());
+		Assert::count($expectedCount, $vectorFactory);
+	}
+
+
+	/** @return array<int, array{array<int|float|string|Fraction>, Fraction[], int}> */
+	public function provideCreationData(): array
+	{
+		return [
+			[
+				[1, '2', 3.0, new Fraction('4')],
+				[new Fraction('1'), new Fraction('2'), new Fraction('3'), new Fraction('4')],
+				4,
+			],
+			[
+				['a' => 1, 'b' => '2', 3.0, 'xyz' => new Fraction('4')],
+				[new Fraction('1'), new Fraction('2'), new Fraction('3'), new Fraction('4')],
+				4,
+			],
+		];
+	}
+
+
+	public function testEmptyVector(): void
+	{
+		Assert::exception(static function (): void {
+			new Vector([]);
+
+		}, EmptyVectorException::class, 'Vector must have at least one value.');
+
+		Assert::exception(static function (): void {
+			Vector::create([]);
+
+		}, EmptyVectorException::class, 'Vector must have at least one value.');
+	}
+
+}
+
+
+(new VectorTest)->run();