1 files changed, 87 insertions, 0 deletions
diff --git a/lib/private/app/dependencyanalyzer.php b/lib/private/app/dependencyanalyzer.php
new file mode 100644
index 00000000000..fb4b3761656
--- /dev/null
+++ b/lib/private/app/dependencyanalyzer.php
@@ -0,0 +1,87 @@
+<?php
+ /**
+ * @author Thomas Müller
+ * @copyright 2014 Thomas Müller deepdiver@owncloud.com
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\App;
+
+class DependencyAnalyzer {
+
+	/** @var Platform */
+	private $system;
+
+	/** @var \OCP\IL10N */
+	private $l;
+
+	/** @var array  */
+	private $missing;
+
+	/** @var array  */
+	private $dependencies;
+
+	/**
+	 * @param array $app
+	 * @param Platform $platform
+	 * @param \OCP\IL10N $l
+	 */
+	function __construct(array $app, $platform, $l) {
+		$this->system = $platform;
+		$this->l = $l;
+		$this->missing = array();
+		$this->dependencies = array();
+		if (array_key_exists('dependencies', $app)) {
+			$this->dependencies = $app['dependencies'];
+		}
+	}
+
+	/**
+	 * @param array $app
+	 * @returns array of missing dependencies
+	 */
+	public function analyze() {
+		$this->analysePhpVersion();
+		$this->analyseSupportedDatabases();
+		return $this->missing;
+	}
+
+	private function analysePhpVersion() {
+		if (isset($this->dependencies['php']['@attributes']['min-version'])) {
+			$minVersion = $this->dependencies['php']['@attributes']['min-version'];
+			if (version_compare($this->system->getPhpVersion(), $minVersion, '<')) {
+				$this->missing[] = (string)$this->l->t('PHP %s or higher is required.', $minVersion);
+			}
+		}
+		if (isset($this->dependencies['php']['@attributes']['max-version'])) {
+			$maxVersion = $this->dependencies['php']['@attributes']['max-version'];
+			if (version_compare($this->system->getPhpVersion(), $maxVersion, '>')) {
+				$this->missing[] = (string)$this->l->t('PHP with a version less then %s is required.', $maxVersion);
+			}
+		}
+	}
+
+	private function analyseSupportedDatabases() {
+		if (!isset($this->dependencies['database'])) {
+			return;
+		}
+
+		$supportedDatabases = $this->dependencies['database'];
+		if (empty($supportedDatabases)) {
+			return;
+		}
+		$supportedDatabases = array_map(function($db) {
+			if (isset($db['@value'])) {
+				return $db['@value'];
+			}
+			return $db;
+		}, $supportedDatabases);
+		$currentDatabase = $this->system->getDatabase();
+		if (!in_array($currentDatabase, $supportedDatabases)) {
+			$this->missing[] = (string)$this->l->t('Following databases are supported: %s', join(', ', $supportedDatabases));
+		}
+	}
+}