new: [widgets] button for link (#6489)

app/Lib/Dashboard/ButtonWidget.php

@@ -0,0 +1,34 @@
+<?php
+
+class ButtonWidget
+{
+    public $title = 'Button Widget';
+    public $render = 'Button';
+    public $width = 3;
+    public $height = 2;
+    public $cacheLifetime = false;
+    public $autoRefreshDelay = false;
+    public $params = array(
+        'url' => 'URL (after base url) to redirect to',
+        'text' => 'Text to display on the button'
+    );
+    public $description = 'Simple button to allow shortcuts';
+    public $placeholder =
+'{
+    "url": "/events/index",
+    "text": "Go to events"
+}';
+
+    public function handler($user, $options = array())
+    {
+        $data = array();
+        if(isset($options['url'])) {
+            $data['url'] = $options['url'];
+        }
+        if(isset($options['text'])) {
+            $data['text'] = $options['text'];
+        }
+
+        return $data;
+    }
+}

app/View/Elements/dashboard/Widgets/Button.ctp

@@ -0,0 +1,27 @@
+<div>
+        <?php
+        /*
+        * A simple button to add a link to a specific section
+        *
+        * Expected input:
+        * { url: <relative url>, text: <text to be displayed on the button>}
+        *
+        * Example:
+        * {url: "/events/index", text: "To the list of events"}
+        *
+        */
+        echo '<a href="'.$baseurl.h($data['url']).'">';
+        echo '<button class="btn btn-primary widget-button">';
+        echo h($data['text']);
+        echo '</button></a>';
+        ?>
+</div>
+
+<style widget-scoped>
+    .widget-button {
+        height: 100%;
+        width: 100%;
+        text-align: center;
+        font-size: large;
+    }
+</style>