Enhancement: Implement Markdown\VersionCollector

CHANGELOG.md

@@ -8,4 +8,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 For a full diff see [`88cf670...main`][88cf670...main].
 
+### Added
+
+- Added `Markdown\VersionCollector` ([#12]), by [@localheinz]
+
 [88cf670...main]: https://github.com/ergebnis/keep-a-changelog/compare/88cf670...main
+
+[#12]: https://github.com/ergebnis/keep-a-changelog/pull/12
+
+[@localheinz]: https://github.com/localheinz

composer-require-checker.json

@@ -1,6 +1,6 @@
 {
   "symbol-whitelist": [
-    "self",
+    "array",
     "string"
   ]
 }

composer.json

@@ -17,7 +17,8 @@
     "security": "https://github.com/ergebnis/keep-a-changelog/blob/main/.github/SECURITY.md"
   },
   "require": {
-    "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0"
+    "php": "~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
+    "ergebnis/version": "^1.1.0"
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2.28.3",

src/Markdown/VersionCollector.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2024 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/keep-a-changelog
+ */
+
+namespace Ergebnis\KeepAChangelog\Markdown;
+
+use Ergebnis\Version;
+
+final class VersionCollector
+{
+    /**
+     * @return list<Version\Version>
+     */
+    public function collect(string $content): array
+    {
+        $versions = [];
+
+        foreach (\explode("\n", $content) as $line) {
+            if (0 === \preg_match('/^## \[`(?P<version>[^`]+)`]/', $line, $matches)) {
+                continue;
+            }
+
+            try {
+                $version = Version\Version::fromString($matches['version']);
+            } catch (Version\Exception\InvalidVersion $exception) {
+                continue;
+            }
+
+            $versions[] = $version;
+        }
+
+        \usort($versions, static function (Version\Version $a, Version\Version $b): int {
+            return $a->compare($b);
+        });
+
+        return $versions;
+    }
+}

test/Fixture/Markdown/VersionCollector/CHANGELOG.md

@@ -0,0 +1,51 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## Unreleased
+
+For a full diff see [`1.1.0...main`][1.1.0...main].
+
+## [`1.1.0`][1.1.0]
+
+For a full diff see [`1.0.0...1.1.0`][1.0.0...1.1.0].
+
+### Added
+
+- Added support for PHP 8.0 ([#77]), by [@localheinz]
+- Added support for PHP 7.4 ([#78]), by [@localheinz]
+
+## [`Not-a-version`][1.0.0]
+
+## [`1.0.0`][1.0.0]
+
+For a full diff see [`64ced12...1.0.0`][64ced12...1.0.0].
+
+### Added
+
+- Added `Version` as a value object ([#1]), by [@localheinz]
+- Added `Major` as a value object ([#3]), by [@localheinz]
+- Added `Minor` as a value object ([#4]), by [@localheinz]
+- Added `Patch` as a value object ([#5]), by [@localheinz]
+- Added `PreRelease` as a value object ([#8]), by [@localheinz]
+- Added `BuildMetaData` as a value object ([#9]), by [@localheinz]
+
+## [`Also-not-a-version`]
+
+[1.0.0]: https://github.com/ergebnis/version/releases/tag/1.0.0
+
+[64ced12...1.0.0]: https://github.com/ergebnis/version/compare/64ced12...1.0.0
+[1.0.0...1.1.0]: https://github.com/ergebnis/version/compare/1.0.0...1.1.0
+[1.1.0...main]: https://github.com/ergebnis/version/compare/1.1.0...main
+
+[#1]: https://github.com/ergebnis/version/pull/1
+[#3]: https://github.com/ergebnis/version/pull/3
+[#4]: https://github.com/ergebnis/version/pull/4
+[#5]: https://github.com/ergebnis/version/pull/5
+[#8]: https://github.com/ergebnis/version/pull/8
+[#9]: https://github.com/ergebnis/version/pull/9
+[#77]: https://github.com/ergebnis/version/pull/77
+
+[@localheinz]: https://github.com/localheinz

test/Unit/Markdown/VersionCollectorTest.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2024 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/keep-a-changelog
+ */
+
+namespace Ergebnis\KeepAChangelog\Test\Unit\Markdown;
+
+use Ergebnis\KeepAChangelog\Markdown;
+use Ergebnis\KeepAChangelog\Test;
+use Ergebnis\Version;
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\KeepAChangelog\Markdown\VersionCollector
+ */
+final class VersionCollectorTest extends Framework\TestCase
+{
+    use Test\Util\Helper;
+
+    public function testCollectReturnsEmptyArrayWhenContentIsEmptyString(): void
+    {
+        $content = '';
+
+        $versionCollector = new Markdown\VersionCollector();
+
+        $collected = $versionCollector->collect($content);
+
+        self::assertSame([], $collected);
+    }
+
+    public function testCollectReturnsEmptyArrayWhenContentDoesNotContainAnyVersions(): void
+    {
+        $content = self::faker()->realText();
+
+        $versionCollector = new Markdown\VersionCollector();
+
+        $collected = $versionCollector->collect($content);
+
+        self::assertSame([], $collected);
+    }
+
+    public function testCollectArrayWithVersionWhenContentContainsVersions(): void
+    {
+        $content = \file_get_contents(__DIR__ . '/../../Fixture/Markdown/VersionCollector/CHANGELOG.md');
+
+        $versionCollector = new Markdown\VersionCollector();
+
+        $collected = $versionCollector->collect($content);
+
+        $expected = [
+            Version\Version::fromString('1.0.0'),
+            Version\Version::fromString('1.1.0'),
+        ];
+
+        self::assertEquals($expected, $collected);
+    }
+}