$json = get($biostor . '/reference/' . $id . '.bibjson');
if ($json != '') {
$reference = json_decode($json);
if ($reference) {
// ignore stuff tnot linked to BHL
$go = true;
if ($reference->link) {
foreach ($reference->link as $link) {
if ($link->url == 'http://www.biodiversitylibrary.org/page/0') {
$go = false;
}
}
}
if ($go) {
$reference->_id = 'biostor/' . $id;
$reference->citation = reference_to_citation_string($reference);
// thumbnail
$url = $biostor . '/reference/' . $id . '.json';
$json = get($url);
if ($json != '') {
$obj = json_decode($json);
// thumbnail
$reference->thumbnail = $obj->thumbnails[0];
// date
if (isset($obj->date)) {
$reference->date = array();
if (preg_match('/(?<year>[0-9]{4})/', $obj->date, $m)) {
$reference->date[] = (int) $m['year'];
}
if (preg_match('/(?<year>[0-9]{4})-(?<month>\\d+)/', $obj->date, $m)) {
$month = preg_replace('/^0+/', '', $m['month']);
/**
* @brief Handle OpenURL request
*
* We may have more than one parameter with same name, so need to access QUERY_STRING, not _GET
* http://stackoverflow.com/questions/353379/how-to-get-multiple-parameters-with-same-name-from-a-url-in-php
*
*/
function main()
{
global $config;
global $couch;
global $debug;
$debug = false;
$webhook = '';
$callback = '';
// If no query parameters
if (count($_GET) == 0) {
//display_form();
exit(0);
}
if (isset($_GET['webhook'])) {
$webhook = $_GET['webhook'];
}
if (isset($_GET['debug'])) {
$debug = true;
}
if (isset($_GET['callback'])) {
$callback = $_GET['callback'];
}
// Handle query and display results.
$query = explode('&', html_entity_decode($_SERVER['QUERY_STRING']));
$params = array();
foreach ($query as $param) {
list($key, $value) = explode('=', $param);
$key = preg_replace('/^\\?/', '', urldecode($key));
$params[$key][] = trim(urldecode($value));
}
if ($debug) {
echo '<h1>Params</h1>';
echo '<pre>';
print_r($params);
echo '</pre>';
}
// This is what we got from user
$context_object = new stdclass();
parse_openurl($params, $context_object);
if ($debug) {
echo '<h1>Referent</h1>';
echo '<pre>';
print_r($context_object);
echo '</pre>';
}
// OK, can we find this?
// result object
$openurl_result = new stdclass();
$openurl_result->results = array();
$openurl_result->query_ok = false;
// via DOI or other identifier
if (count($openurl_result->results) == 0) {
// identifier search
if (isset($context_object->referent->identifier)) {
//print_r($context_object->referent->identifier);
$found = false;
foreach ($context_object->referent->identifier as $identifier) {
//print_r($identifier);
if (!$found) {
switch ($identifier->type) {
case 'doi':
$url = $config['couchdb_options']['database'] . "/_design/identifier/_view/doi?key=" . urlencode('"' . $identifier->id . '"');
//echo $url . '<br />';
$resp = $couch->send("GET", "/" . $url . '&limit=1');
$result = json_decode($resp);
if (count($result->rows) == 1) {
$found = true;
$match = new stdclass();
$match->match = true;
$match->id = $result->rows[0]->id;
$match->{$identifier->type} = $identifier->id;
$openurl_result->results[] = $match;
$openurl_result->query_ok = true;
}
break;
default:
break;
}
}
}
}
}
// classical OpenURL lookup using [ISSN,volume,spage] triple
if (count($openurl_result->results) == 0) {
$triple = false;
if (isset($context_object->referent->journal->name)) {
$journal = $context_object->referent->journal->name;
$journal = strtolower($journal);
$journal = preg_replace('/\\bfor\\b/', '', $journal);
$journal = preg_replace('/\\band\\b/', '', $journal);
$journal = preg_replace('/\\bof\\b/', '', $journal);
$journal = preg_replace('/\\bthe\\b/', '', $journal);
// whitespace
$journal = preg_replace('/\\s+/', '', $journal);
// punctuation
$journal = preg_replace('/[\\.|,|\'|\\(|\\)]+/', '', $journal);
if (isset($context_object->referent->journal->volume)) {
$volume = $context_object->referent->journal->volume;
if (isset($context_object->referent->journal->pages)) {
if (is_numeric($context_object->referent->journal->pages)) {
$spage = $context_object->referent->journal->pages;
$triple = true;
} else {
if (preg_match('/^(?<spage>\\d+)--(?<epage>\\d+)$/', $context_object->referent->journal->pages, $m)) {
$spage = $m['spage'];
$triple = true;
}
}
}
}
if ($triple) {
$openurl_result->query_ok = true;
// i. get ISSN
$url = $config['couchdb_options']['database'] . "/_design/openurl/_view/journal_to_issn?key=" . urlencode('"' . $journal . '"');
//echo $url;
$resp = $couch->send("GET", "/" . $url . '&limit=1');
$result = json_decode($resp);
if (count($result->rows) == 1) {
// we have an ISSN for this journal
$issn = $result->rows[0]->value;
// build triple [ISSN, volume, spage]
$keys = array($issn, $volume, $spage);
$url = $config['couchdb_options']['database'] . "/_design/openurl/_view/triple?key=" . urlencode(json_encode($keys));
//echo $url . '<br />';
$resp = $couch->send("GET", "/" . $url);
$r = json_decode($resp);
//print_r($r);
if (count($r->rows) > 0) {
foreach ($r->rows as $row) {
$match = new stdclass();
$match->match = true;
$match->triple = $keys;
$match->id = $row->id;
$openurl_result->results[] = $match;
}
}
}
}
}
}
// full text search
if (count($openurl_result->results) == 0) {
find_citation(reference_to_citation_string($context_object->referent), $openurl_result);
}
// ok, if we have one or more results we return these and let user/agent decide what to do
// populate with details
$num_results = count($openurl_result->results);
for ($i = 0; $i < $num_results; $i++) {
$resp = $couch->send("GET", "/" . $config['couchdb_options']['database'] . "/" . urlencode($openurl_result->results[$i]->id));
$reference = json_decode($resp);
if (!isset($reference->error)) {
$openurl_result->results[$i]->reference = $reference;
}
}
// for now just return JSON
if ($callback != '') {
echo $callback . '(';
}
echo json_encode($openurl_result);
if ($callback != '') {
echo ')';
}
}
