Require a specific version of the Zend Framework

refs #7163

modules/setup/library/Setup/WebWizard.php

@@ -5,6 +5,7 @@
 namespace Icinga\Module\Setup;
 
 use PDOException;
+use Zend_Version;
 use Icinga\Web\Form;
 use Icinga\Web\Wizard;
 use Icinga\Web\Request;
@@ -386,6 +387,20 @@ public function getRequirements()
             sprintf(mt('setup', 'You are running PHP version %s.'), $phpVersion)
         );
 
+        // The only reason for requiring 1.12.2 is a bug in Zend_Form_Decorator_ViewHelper in older versions causing a
+        // Zend_Form_Element_Button's value not being rendered. Feel free to adjust this in case we require an earlier
+        // version!
+        $zendVersion = Zend_Version::VERSION;
+        $requirements->addMandatory(
+            mt('setup', 'Zend Framework 1'),
+            mt(
+                'setup',
+                'Icinga Web 2 requires at least Zend Framework 1.12.2 to work properly.'
+            ),
+            Zend_Version::compareVersion('1.12.2') !== 1,
+            sprintf(mt('setup', 'You have got Zend Framwork %s installed.'), $zendVersion)
+        );
+
         $defaultTimezone = Platform::getPhpConfig('date.timezone');
         $requirements->addMandatory(
             mt('setup', 'Default Timezone'),