Add date sensor

php-client/src/Date.php

+<?php
+
+namespace Monitor;
+
+use Symfony\Component\Process\Process;
+
+/**
+ * Unix timestamp (can be used to check that time is correctly configured on
+ * this server). date +%s
+ *
+ * @author tibo
+ */
+class Date implements SensorInterface {
+
+    public function run() {
+        $process = new Process('date +%s');
+        $process->run();
+        return $process->getOutput();
+
+    }
+}

php-client/src/PingCommand.php

@@ -4,7 +4,6 @@ namespace Monitor;
 
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
-use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 
@@ -62,7 +61,8 @@ class PingCommand extends Command {
             "inodes" => Inodes::class,
             "cpu" => CPUInfo::class,
             "lsb" => LSB::class,
-            "memory" => MemInfo::class
+            "memory" => MemInfo::class,
+            "date" => Date::class
         ];
 
         foreach ($sensors as $key => $sensor_class) {