<?php
/* Pi-hole: A black hole for Internet advertisements
*  (c) 2017 Pi-hole, LLC (https://pi-hole.net)
*  Network-wide ad blocking via your own hardware.
*
*  This file is copyright under the latest version of the EUPL.
*  Please see LICENSE file for your rights under this license. */

function gravity_last_update($raw = false){
	/*
	@walter-exit | April 23rd, 2018:
	Checks when the gravity list was last updated, if it exists at all.
	Returns the info in human-readable format for use on the dashboard,
	or raw for use by the API.
	*/
	$gravitylist = "/etc/pihole/gravity.list";
	if (file_exists($gravitylist)){
		$date_file_created_unix = filemtime($gravitylist);
		$date_file_created = date_create("@".$date_file_created_unix);
		$date_now = date_create("now");
	    $gravitydiff = date_diff($date_file_created,$date_now);
	    if($raw){
			$output = array(
				"file_exists"=> true,
				"absolute" => $date_file_created_unix,
				"relative" => array(
					"days" =>  $gravitydiff->format("%a"),
					"hours" =>  $gravitydiff->format("%H"),
					"minutes" =>  $gravitydiff->format("%I"),
				)
			);
		}else{
			if($gravitydiff->d > 1){
		        $output = $gravitydiff->format("Blocking list updated %a days, %H:%I ago");
		    }elseif($gravitydiff->d == 1){
		        $output = $gravitydiff->format("Blocking list updated one day, %H:%I ago");
		    }else{
		        $output = $gravitydiff->format("Blocking list updated %H:%I ago");
		    }
		}
	}else{
		if($raw){
			$output = array("file_exists"=>false);
		}else{
			$output = "Blocking list not found";	
		}
	}
	return $output;
}

?>