<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 

/*
	Controls the interaction with the QRZ.com Subscription based XML API.
*/


class Qrz {

	// Return session key
	public function session($username, $password) {
		// URL to the XML Source
		$xml_feed_url = 'http://xmldata.qrz.com/xml/current/?username='.$username.';password='.urlencode($password).';agent=wavelog';
		
		// CURL Functions
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $xml_feed_url);
		curl_setopt($ch, CURLOPT_HEADER, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$xml = curl_exec($ch);
		curl_close($ch);
		
		// Create XML object
		$xml = simplexml_load_string($xml);
		
		// Return Session Key
		return (string) $xml->Session->Key;
	}
	
	// Set Session Key session.
	public function set_session($username, $password) {
	
		$ci = & get_instance();
		
		// URL to the XML Source
		$xml_feed_url = 'http://xmldata.qrz.com/xml/current/?username='.$username.';password='.urlencode($password).';agent=wavelog';
		
		// CURL Functions
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $xml_feed_url);
		curl_setopt($ch, CURLOPT_HEADER, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$xml = curl_exec($ch);
		curl_close($ch);
		
		// Create XML object
		$xml = simplexml_load_string($xml);
		
		$key = (string) $xml->Session->Key;
	
		$ci->session->set_userdata('qrz_session_key', $key);
		
		return true;
	}


	public function search($callsign, $key, $use_fullname = false) {
		$data = null;
		try {
			// URL to the XML Source
			$xml_feed_url = 'http://xmldata.qrz.com/xml/current/?s=' . $key . ';callsign=' . $callsign . '';

			// CURL Functions
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_URL, $xml_feed_url);
			curl_setopt($ch, CURLOPT_HEADER, false);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
			$xml = curl_exec($ch);
			$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
			curl_close($ch);
			if ($httpcode != 200) return $data['error'] = 'Problems with qrz.com communication'; // Exit function if no 200. If request fails, 0 is returned
			// Create XML object
			$xml = simplexml_load_string($xml);
			if (!empty($xml->Session->Error)) return $data['error'] = $xml->Session->Error;

			// Return Required Fields
			$data['callsign'] = (string)$xml->Callsign->call;

			if ($use_fullname === true) {
				$data['name'] =  (string)$xml->Callsign->fname. ' ' . (string)$xml->Callsign->name;
			} else {
				$data['name'] = (string)$xml->Callsign->fname;
			}
			$data['name'] = trim($data['name']);

			// Sanitise gridsquare to only allow up to 8 characters
			$unclean_gridsquare = (string)$xml->Callsign->grid; // Get the gridsquare from QRZ convert to string
			$clean_gridsquare = strlen($unclean_gridsquare) > 8 ? substr($unclean_gridsquare,0,8) : $unclean_gridsquare; // Trim gridsquare to 8 characters max
			$data['gridsquare'] = $clean_gridsquare;

			$data['city'] = (string)$xml->Callsign->addr2;
			$data['lat'] = (string)$xml->Callsign->lat;
			$data['long'] = (string)$xml->Callsign->lon;
			$data['dxcc'] = (string)$xml->Callsign->dxcc;
			$data['state'] = (string)$xml->Callsign->state;
			$data['iota'] = (string)$xml->Callsign->iota;
			$data['qslmgr'] = (string)$xml->Callsign->qslmgr;
			$data['image'] = (string)$xml->Callsign->image;

			if ($xml->Callsign->country == "United States") {
				$data['us_county'] = (string)$xml->Callsign->county;
			} else {
				$data['us_county'] = null;
			}
		} finally {

			return $data;
		}
	}
}
