Make the Graphite Web URL configurable over the WebUI

refs #28

application/controllers/ConfigController.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Icinga\Module\Graphite\Controllers;
+
+use Icinga\Module\Graphite\Forms\ConfigForm;
+use Icinga\Web\Controller;
+
+class ConfigController extends Controller
+{
+    public function indexAction()
+    {
+        $this->view->form = $form = new ConfigForm();
+        $form->setIniConfig($this->Config())->handleRequest();
+        $this->view->tabs = $this->Module()->getConfigTabs()->activate('backend');
+    }
+}

application/forms/ConfigForm.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace Icinga\Module\Graphite\Forms;
+
+use Icinga\Forms\ConfigForm as BaseConfigForm;
+
+class ConfigForm extends BaseConfigForm
+{
+    public function init()
+    {
+        $this->setName('form_config_graphite');
+        $this->setSubmitLabel($this->translate('Save Changes'));
+    }
+
+    public function createElements(array $formData)
+    {
+        $this->addElement(
+            'text',
+            'graphite_web_url',
+            array(
+                'required'      => true,
+                'label'         => $this->translate('Graphite Web URL'),
+                'description'   => $this->translate('URL to your Graphite Web'),
+                'validators'    => ['UrlValidator']
+            )
+        );
+    }
+}

application/views/scripts/config/index.phtml

@@ -0,0 +1,7 @@
+<div class="controls">
+    <?= /** @var \Icinga\Web\Widget\Tabs $tabs */ $tabs ?>
+</div>
+
+<div class="content">
+    <?= /** @var \Icinga\Module\Graphite\Forms\ConfigForm $form */ $form ?>
+</div>

configuration.php

@@ -4,3 +4,9 @@
 
 $this->menuSection(N_('Graphite'), ['icon' => 'chart-area'])->setUrl('graphite/show/overview');
 
+$this->provideConfigTab('backend', array(
+    'title' => $this->translate('Configure the Graphite Web backend'),
+    'label' => $this->translate('Backend'),
+    'url' => 'config'
+));
+