<?php
	# CSE 154
	# This web service takes a name and gender as parameters and outputs a set of
	# rankings of popularity of that name as XML or JSON.

	# sets a 410 status if missing name or gender info
	if(!isset($_GET["name"]) || !isset($_GET["gender"])) {
		header("HTTP/1.1 400 Invalid Request");
		die("Sorry, we don't have any data for " + $name + " " + $gender);
	}

	$name = $_GET["name"];
	$gender = $_GET["gender"];

	# searches the file for the name
	$lines = file("rank.txt", FILE_IGNORE_NEW_LINES);
	$found = false;
	foreach($lines as $line) {
		$tokens = explode(" ", $line);
		if($tokens[0] == $name && $tokens[1] == $gender) {
			$found = true;
			createJSON($tokens, $name, $gender);
		}
	}

	# if we have gotten here the name/gender combo isn't in our file.
	if(!$found) {
		header("HTTP/1.1 410 Gone");
		die("Sorry, we don't have any data for " + $name + " " + $gender);
	}

	# creates and prints JSON about the passed in 
	# name and gender from the array of tokens
	function createJSON ($tokens, $name, $gender) {
		$rankings = array_slice($tokens, 2);
		$data = array(
			"name" => $name,
			"gender" => $gender,
			"rankings" => $rankings
		);
		header("Content-type: application/json");
		print (json_encode($data));
	}


	# creates and prints XML about the passed in 
	# name and gender from the array of tokens
	function createXML ($tokens, $name, $gender) {
		$dom = new DOMDocument();
		$baby = $dom->createElement("baby");
		$baby->setAttribute("name", $name);
		$baby->setAttribute("gender", $gender);
		$dom->appendChild($baby);
		$year = 1890;
		for($i = 2; $i < count($tokens); $i++) {
			$rank = $dom->createElement("rank");
			$rank->setAttribute("year", $year);
			$year += 10;
			$text = $dom->createTextNode($tokens[$i]);
			$rank->appendChild($text);
			$baby->appendChild($rank);
		}
		header("Content-type: text/xml");
		print($dom->saveXML());
	}
	
?>