Add requirements page

refs #7163

application/forms/Setup/RequirementsPage.php

@@ -0,0 +1,69 @@
+<?php
+// {{{ICINGA_LICENSE_HEADER}}}
+// {{{ICINGA_LICENSE_HEADER}}}
+
+namespace Icinga\Form\Setup;
+
+use Icinga\Web\Form;
+use Icinga\Web\Setup\Requirements;
+
+/**
+ * Wizard page to list installation requirements
+ */
+class RequirementsPage extends Form
+{
+    /**
+     * The requirements to list
+     *
+     * @var Requirements
+     */
+    protected $requirements;
+
+    /**
+     * Initialize this page
+     */
+    public function init()
+    {
+        $this->setName('setup_requirements');
+        $this->setViewScript('form/setup-requirements.phtml');
+    }
+
+    /**
+     * Set the requirements to list
+     *
+     * @param   Requirements    $requirements
+     *
+     * @return  self
+     */
+    public function setRequirements(Requirements $requirements)
+    {
+        $this->requirements = $requirements;
+        return $this;
+    }
+
+    /**
+     * Return the requirements to list
+     *
+     * @return  Requirements
+     */
+    public function getRequirements()
+    {
+        return $this->requirements;
+    }
+
+    /**
+     * Validate the given form data and check whether the requirements are fulfilled
+     *
+     * @param   array   $data   The data to validate
+     *
+     * @return  bool
+     */
+    public function isValid($data)
+    {
+        if (false === parent::isValid($data)) {
+            return false;
+        }
+
+        return $this->requirements->fulfilled();
+    }
+}

application/views/scripts/form/setup-requirements.phtml

@@ -0,0 +1,33 @@
+<?php
+
+use Icinga\Web\Wizard;
+use Icinga\Web\Setup\Requirements;
+
+$requirements = $form->getRequirements();
+
+?>
+<table>
+  <tbody>
+<?php foreach ($requirements as $requirement): ?>
+    <tr>
+      <td><?= $requirement->title; ?></td>
+      <td><?= $requirement->description; ?></td>
+      <td style="background-color: <?= $requirement->state === Requirements::STATE_OK ? 'green' : (
+        $requirement->state === Requirements::STATE_OPTIONAL ? 'yellow' : 'red'
+      ); ?>"><?= $requirement->message; ?></td>
+    </tr>
+<?php endforeach ?>
+  </tbody>
+</table>
+<form id="<?= $form->getName(); ?>" name="<?= $form->getName(); ?>" enctype="<?= $form->getEncType(); ?>" method="<?= $form->getMethod(); ?>">
+  <?= $form->getElement($form->getTokenElementName()); ?>
+  <?= $form->getElement($form->getUidElementName()); ?>
+  <?= $form->getElement(Wizard::BTN_PREV); ?>
+  <?php
+    $btn = $form->getElement(Wizard::BTN_NEXT);
+    if (false === $requirements->fulfilled()) {
+        $btn->setAttrib('disabled', 1);
+    }
+    echo $btn;
+  ?>
+</form>