1 files changed, 112 insertions, 0 deletions
diff --git a/application/forms/Config/BackendConfigForm.php b/application/forms/Config/BackendConfigForm.php
new file mode 100644
index 0000000..a9c85c1
--- /dev/null
+++ b/application/forms/Config/BackendConfigForm.php
@@ -0,0 +1,112 @@
+<?php
+/* Icinga Web 2 | (c) 2016 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Eventdb\Forms\Config;
+
+use Exception;
+use Icinga\Data\ResourceFactory;
+use Icinga\Forms\ConfigForm;
+
+/**
+ * Form for managing the connection to the EventDB backend
+ */
+class BackendConfigForm extends ConfigForm
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function init()
+    {
+        $this->setSubmitLabel($this->translate('Save'));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function createElements(array $formData)
+    {
+        $resources = array();
+        foreach (ResourceFactory::getResourceConfigs() as $name => $config) {
+            if ($config->type === 'db') {
+                $resources[] = $name;
+            }
+        }
+
+        $this->addElement(
+            'select',
+            'backend_resource',
+            array(
+                'description'   => $this->translate('The resource to use'),
+                'label'         => $this->translate('Resource'),
+                'multiOptions'  => array_combine($resources, $resources),
+                'required'      => true
+            )
+        );
+
+        if (isset($formData['skip_validation']) && $formData['skip_validation']) {
+            $this->addSkipValidationCheckbox();
+        }
+    }
+
+    /**
+     * Return whether the given values are valid
+     *
+     * @param   array   $formData   The data to validate
+     *
+     * @return  bool
+     */
+    public function isValid($formData)
+    {
+        if (! parent::isValid($formData)) {
+            return false;
+        }
+
+        if (($el = $this->getElement('skip_validation')) === null || ! $el->isChecked()) {
+            $resourceConfig = ResourceFactory::getResourceConfig($this->getValue('backend_resource'));
+
+            if (! $this->isValidEventDbSchema($resourceConfig)) {
+                if ($el === null) {
+                    $this->addSkipValidationCheckbox();
+                }
+
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function isValidEventDbSchema($resourceConfig)
+    {
+        try {
+            $db = ResourceFactory::createResource($resourceConfig);
+            $db->select()->from('event', array('id'))->fetchOne();
+        } catch (Exception $_) {
+            $this->error($this->translate(
+                'Cannot find the EventDB schema. Please verify that the given database '
+                . 'contains the schema and that the configured user has access to it.'
+            ));
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Add a checkbox to the form by which the user can skip the schema validation
+     */
+    protected function addSkipValidationCheckbox()
+    {
+        $this->addElement(
+            'checkbox',
+            'skip_validation',
+            array(
+                'description'   => $this->translate(
+                    'Check this to not to validate the EventDB schema of the chosen resource'
+                ),
+                'ignore'        => true,
+                'label'         => $this->translate('Skip Validation'),
+                'order'         => 0
+            )
+        );
+    }
+}