Add Cli command to generate and show setup tokens

One is now able to utilize `icingacli setup (show/generate)Token`

refs #7163

application/clicommands/SetupCommand.php

@@ -0,0 +1,63 @@
+<?php
+// {{{ICINGA_LICENSE_HEADER}}}
+// {{{ICINGA_LICENSE_HEADER}}}
+
+namespace Icinga\Clicommands;
+
+use Icinga\Cli\Command;
+
+/**
+ * Setup Icinga Web 2
+ *
+ * The setup command allows you to install/configure Icinga Web 2
+ *
+ * Usage: icingacli setup <action> [<argument>]
+ */
+class SetupCommand extends Command
+{
+    /**
+     * Display the current setup token
+     *
+     * Shows you the current setup token used to authenticate when installing Icinga Web 2 using the web-based wizard
+     *
+     * USAGE:
+     *
+     *   icingacli setup showToken
+     */
+    public function showTokenAction()
+    {
+        $token = @file_get_contents($this->app->getConfigDir() . '/setup.token');
+        if (! $token) {
+            $this->fail(
+                $this->translate('Nothing to show. Please create a new setup token using the generateToken action.')
+            );
+        }
+
+        printf($this->translate("The current setup token is: %s\n"), $token);
+    }
+
+    /**
+     * Create a new setup token
+     *
+     * Re-generates the setup token used to authenticate when installing Icinga Web 2 using the web-based wizard
+     *
+     * USAGE:
+     *
+     *   icingacli setup generateToken
+     */
+    public function generateTokenAction()
+    {
+        $token = bin2hex(openssl_random_pseudo_bytes(8));
+        $filepath = $this->app->getConfigDir() . '/setup.token';
+
+        if (false === @file_put_contents($filepath, $token)) {
+            $this->fail($this->translate('Cannot write setup token to disk.'));
+        }
+
+        if (false === @chmod($filepath, 0640)) {
+            $this->fail(sprintf($this->translate('Cannot change access mode of "%s" to %o.'), $filepath, 0640));
+        }
+
+        printf($this->translate("The newly generated setup token is: %s\n"), $token);
+    }
+}