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SimonXIX/item_checker.php

Last active May 15, 2017 13:30
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Script to display real-time availability of items in Ex Libris Alma. This was used as a proof-of-concept for a webpage to check the availability of borrowable laptops in LapSafe self-service laptop lockers. N.b.: only works on bibs with a single item record.
Raw
item_checker.php
<?php
# @name: item_checker.php
# @version: 0.3
# @license: GNU General Public License version 3 (GPLv3) <https://www.gnu.org/licenses/gpl-3.0.en.html>
# @purpose: Display real-time availability information for laptops for loan at Imperial College London Library
# @author: Simon Barron <[email protected]>
# @acknowledgements: Based on a script by Chris Keene available at https://gist.github.com/chriskeene
?>
<html>
<head>
<meta http-equiv="refresh" content="300">
<link rel="stylesheet" href="laptops.css">
<title>Laptop availability - Imperial College London</title>
</head>
<body>
<table>
<tr>
<th>Locker</th>
<th>Barcode</th>
<th>Availability</th>
</tr>
<?php
$mms00 = urlencode('xxxxxxxxxxxxxx');
$mms01 = urlencode('xxxxxxxxxxxxxx');
$mms02 = urlencode('xxxxxxxxxxxxxx');
$mms03 = urlencode('xxxxxxxxxxxxxx');
$mms04 = urlencode('xxxxxxxxxxxxxx');
$mms05 = urlencode('xxxxxxxxxxxxxx');
$mms06 = urlencode('xxxxxxxxxxxxxx');
$mms07 = urlencode('xxxxxxxxxxxxxx');
$mms08 = urlencode('xxxxxxxxxxxxxx');
$mms09 = urlencode('xxxxxxxxxxxxxx');
$mmsarray = [$mms00,$mms01,$mms02,$mms03,$mms04,$mms05,$mms06,$mms07,$mms08,$mms09];
function curlMultiRequest($urls) {
$ch = array();
$results = array();
$mh = curl_multi_init();
foreach($urls as $key => $val) {
$ch[$key] = curl_init();
curl_setopt($ch[$key],CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch[$key], CURLOPT_URL, $val);
//curl_setopt ($ch[$key], CURLOPT_FAILONERROR,1);
// follow line enables https
curl_setopt($ch[$key], CURLOPT_SSL_VERIFYPEER, false);
curl_multi_add_handle($mh, $ch[$key]);
}
$running = null;
do {
$status = curl_multi_exec($mh, $running);
$info = curl_multi_info_read($mh);
if ( $info['result'] != 0 ) {
//print_r($info);
}
}
while ($running > 0);
// Get content and remove handles.
foreach ($ch as $key => $val) {
$results[$key] = curl_multi_getcontent($val);
curl_multi_remove_handle($mh, $val);
}
curl_multi_close($mh);
return $results;
}
function getItems(){
global $mmsarray;
$apikey = urlencode('xxxxxxxxxxxxxx');
$baseurl = 'https://api-eu.hosted.exlibrisgroup.com/almaws/v1/bibs/';
$format = 'json';
$count=0;
$holdinglist = array(); // for holding the holdings
$items = array(); // what we will return
$urllist = array();
// prepare loans urls
// GET /almaws/v1/bibs/{mms_id}/loans
$paramurl = '?apikey=' . $apikey . '&format=' . $format;
foreach ($mmsarray as $key => $value){
$urllist['loans'][$key] = $baseurl . $value . '/loans' . $paramurl;
}
// prepare holdings urls
// GET /almaws/v1/bibs/{mms_id}/holdings
$suffixurl = '/holdings?apikey=' . $apikey . '&format=' . $format;
foreach ($mmsarray as $key => $value){
$urllist['holdings'][$key] = $baseurl . $value . $suffixurl;
}
// get loans and holdings from api
// returns an array, keys are loans/holdings.
// values are the json responses
$loans = curlMultiRequest($urllist['loans']);
$holdings = curlMultiRequest($urllist['holdings']);
$loaninfo = array();
// loans json
foreach ($loans as $key => $value){
$json = json_decode($value, true);
$loans[$key] = $json['item_loan'][0]['due_date'];
}
// set mms ids as array keys
$loans = array_combine($mmsarray, $loans);
// holdings json
foreach ($holdings as $key => $value){
$json = json_decode($value, true);
$holdings[$key] = $json['holding'][0]['holding_id'];
}
// set mms ids as array keys
$holdings = array_combine($mmsarray, $holdings);
// for each holdings id, prepare item urls
// GET /almaws/v1/bibs/{mms_id}/holdings/{holding_id}/items
$suffixurl = '/items?apikey=' . $apikey . '&format=' . $format;
foreach ($holdings as $key => $value) {
$itemurls[$key] = $baseurl . $key . '/holdings/' . $value . $suffixurl;
}
// call each of the item urls at the same time
$results3 = curlMultiRequest($itemurls);
$results3 = array_combine($lockerarray, $results3);
$items = array();
foreach ($results3 as $key => $value){
// create json object based on the item json
$item = json_decode($value, true);
$items[$key]['title'] = (string) $item['item'][0]['bib_data']['title'];
$items[$key]['barcode'] = (string) $item['item'][0]['item_data']['barcode'];
$items[$key]['availability'] = (string) $item['item'][0]['item_data']['base_status']['value'];
if ($items[$key]['availability']) {
$items[$key]['status'] = 'Available';
} else {
$items[$key]['status'] = 'Not Available';
}
$items[$key]['duedate'] = date('G:i l j F', strtotime($loans[$key]));
print
"<tr><td>" . $items[$key]['title'] . "</td><td>" . $items[$key]['barcode'] . "</td>";
if ($items[$key]["status"] === 'Not Available'){
print "<td class='unavailable'>" . "Due: " . $items[$key]['duedate'] . "</td></tr>";
}
else {
print "<td class='available'>" . $items[$key]['status'] . "</td></tr>";
}
}
}
getItems();
?>
</table>
</body>
</html>
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