Include changelog as markdown files and show it in the about dialog

services/ApplicationService.php

@@ -27,4 +27,42 @@ class ApplicationService extends BaseService
 			'sqlite_version' =>  $sqliteVersion
 		);
 	}
+
+	public function GetChangelog()
+	{
+		$changelogItems = array();
+		foreach(glob(__DIR__ . '/../changelog/*.md') as $file)
+		{
+			$fileName = basename($file);
+			$fileNameParts = explode('_', $fileName);
+
+			$fileContent = file_get_contents($file);
+			$version = $fileNameParts[1];
+			$releaseDate = explode('.', $fileNameParts[2])[0];
+			$releaseNumber = intval($fileNameParts[0]);
+
+			$changelogItems[] = array(
+				'version' => $version,
+				'release_date' => $releaseDate,
+				'body' => $fileContent,
+				'release_number' => $releaseNumber
+			);
+		}
+
+		// Sort changelog items to have the changelog descending by newest version
+		usort($changelogItems, function($a, $b)
+		{
+			if ($a['release_number'] == $b['release_number'])
+			{
+				return 0;
+			}
+
+			return ($a['release_number'] < $b['release_number']) ? 1 : -1;
+		});
+
+		return array(
+			'changelog_items' => $changelogItems,
+			'newest_release_number' => $changelogItems[0]['release_number']
+		);
+	}
 }