Implement all known requirements as object

refs #8508

modules/monitoring/library/Monitoring/MonitoringWizard.php

@@ -3,7 +3,6 @@
 
 namespace Icinga\Module\Monitoring;
 
-use Icinga\Application\Platform;
 use Icinga\Web\Form;
 use Icinga\Web\Wizard;
 use Icinga\Web\Request;
@@ -17,6 +16,7 @@
 use Icinga\Module\Monitoring\Forms\Setup\SecurityPage;
 use Icinga\Module\Monitoring\Forms\Setup\IdoResourcePage;
 use Icinga\Module\Monitoring\Forms\Setup\LivestatusResourcePage;
+use Icinga\Module\Setup\Requirement\PhpModuleRequirement;
 
 /**
  * Monitoring Module Setup Wizard
@@ -137,19 +137,15 @@ public function getRequirements()
     {
         $requirements = new Requirements();
 
-        $requirements->addOptional(
-            'existing_php_mod_sockets',
-            mt('monitoring', 'PHP Module: Sockets'),
-            mt(
+        $requirements->add(new PhpModuleRequirement(array(
+            'optional'      => true,
+            'condition'     => 'Sockets',
+            'description'   => mt(
                 'monitoring',
                 'In case it\'s desired that a TCP connection is being used by Icinga Web 2 to'
                 . ' access a Livestatus interface, the Sockets module for PHP is required.'
-            ),
-            Platform::extensionLoaded('sockets'),
-            Platform::extensionLoaded('sockets') ? mt('monitoring', 'The PHP Module sockets is available.') : (
-                mt('monitoring', 'The PHP Module sockets is not available.')
             )
-        );
+        )));
 
         return $requirements;
     }

modules/setup/library/Setup/Requirement/ClassRequirement.php

@@ -0,0 +1,28 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Setup\Requirement;
+
+use Icinga\Application\Platform;
+use Icinga\Module\Setup\Requirement;
+
+class ClassRequirement extends Requirement
+{
+    protected function evaluate()
+    {
+        $classNameOrPath = $this->getCondition();
+        if (Platform::classExists($classNameOrPath)) {
+            $this->setStateText(sprintf(
+                mt('setup', 'The %s is available.', 'setup.requirement.class'),
+                $this->getAlias() ?: $classNameOrPath . ' ' . mt('setup', 'class', 'setup.requirement.class')
+            ));
+            return true;
+        } else {
+            $this->setStateText(sprintf(
+                mt('setup', 'The %s is missing.', 'setup.requirement.class'),
+                $this->getAlias() ?: $classNameOrPath . ' ' . mt('setup', 'class', 'setup.requirement.class')
+            ));
+            return false;
+        }
+    }
+}

modules/setup/library/Setup/Requirement/ConfigDirectoryRequirement.php

@@ -0,0 +1,42 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Setup\Requirement;
+
+use Icinga\Module\Setup\Requirement;
+
+class ConfigDirectoryRequirement extends Requirement
+{
+    public function getTitle()
+    {
+        $title = parent::getTitle();
+        if ($title === null) {
+            return mt('setup', 'Read- and writable configuration directory');
+        }
+
+        return $title;
+    }
+
+    protected function evaluate()
+    {
+        $path = $this->getCondition();
+        if (file_exists($path)) {
+            $readable = is_readable($path);
+            if ($readable && is_writable($path)) {
+                $this->setStateText(sprintf(mt('setup', 'The directory %s is read- and writable.'), $path));
+                return true;
+            } else {
+                $this->setStateText(sprintf(
+                    $readable
+                        ? mt('setup', 'The directory %s is not writable.')
+                        : mt('setup', 'The directory %s is not readable.'),
+                    $path
+                ));
+                return false;
+            }
+        } else {
+            $this->setStateText(sprintf(mt('setup', 'The directory %s does not exist.'), $path));
+            return false;
+        }
+    }
+}

modules/setup/library/Setup/Requirement/OSRequirement.php

@@ -0,0 +1,27 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Setup\Requirement;
+
+use Icinga\Application\Platform;
+use Icinga\Module\Setup\Requirement;
+
+class OSRequirement extends Requirement
+{
+    public function getTitle()
+    {
+        $title = parent::getTitle();
+        if ($title === null) {
+            return sprintf(mt('setup', '%s Platform'), ucfirst($this->getCondition()));
+        }
+
+        return $title;
+    }
+
+    protected function evaluate()
+    {
+        $phpOS = Platform::getOperatingSystemName();
+        $this->setStateText(sprintf(mt('setup', 'You are running PHP on a %s system.'), ucfirst($phpOS)));
+        return strtolower($phpOS) === strtolower($this->getCondition());
+    }
+}

modules/setup/library/Setup/Requirement/PhpConfigRequirement.php

@@ -0,0 +1,22 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Setup\Requirement;
+
+use Icinga\Application\Platform;
+use Icinga\Module\Setup\Requirement;
+
+class PhpConfigRequirement extends Requirement
+{
+    protected function evaluate()
+    {
+        list($configDirective, $value) = $this->getCondition();
+        $configValue = Platform::getPhpConfig($configDirective);
+        $this->setStateText(
+            $configValue
+                ? sprintf(mt('setup', 'The PHP config `%s\' is set to "%s".'), $configDirective, $configValue)
+                : sprintf(mt('setup', 'The PHP config `%s\' is not defined.'), $configDirective)
+        );
+        return is_bool($value) ? $configValue == $value : $configValue === $value;
+    }
+}

modules/setup/library/Setup/Requirement/PhpModuleRequirement.php

@@ -0,0 +1,42 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Setup\Requirement;
+
+use Icinga\Application\Platform;
+use Icinga\Module\Setup\Requirement;
+
+class PhpModuleRequirement extends Requirement
+{
+    public function getTitle()
+    {
+        $title = parent::getTitle();
+        if ($title === $this->getAlias()) {
+            if ($title === null) {
+                $title = $this->getCondition();
+            }
+
+            return sprintf(mt('setup', 'PHP Module: %s'), $title);
+        }
+
+        return $title;
+    }
+
+    protected function evaluate()
+    {
+        $moduleName = $this->getCondition();
+        if (Platform::extensionLoaded($moduleName)) {
+            $this->setStateText(sprintf(
+                mt('setup', 'The PHP module %s is available.'),
+                $this->getAlias() ?: $moduleName
+            ));
+            return true;
+        } else {
+            $this->setStateText(sprintf(
+                mt('setup', 'The PHP module %s is missing.'),
+                $this->getAlias() ?: $moduleName
+            ));
+            return false;
+        }
+    }
+}

modules/setup/library/Setup/Requirement/PhpVersionRequirement.php

@@ -0,0 +1,28 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Setup\Requirement;
+
+use Icinga\Application\Platform;
+use Icinga\Module\Setup\Requirement;
+
+class PhpVersionRequirement extends Requirement
+{
+    public function getTitle()
+    {
+        $title = parent::getTitle();
+        if ($title === null) {
+            return mt('setup', 'PHP Version');
+        }
+
+        return $title;
+    }
+
+    protected function evaluate()
+    {
+        $phpVersion = Platform::getPhpVersion();
+        $this->setStateText(sprintf(mt('setup', 'You are running PHP version %s.'), $phpVersion));
+        list($operator, $requiredVersion) = $this->getCondition();
+        return version_compare($phpVersion, $requiredVersion, $operator);
+    }
+}