/**
* Get the bibtex data from an URI
*/
function &getData($biburis, $timeout = 3600) {
// Loop over the different given URIs
$array = explode(",", $biburis);
$result = array();
foreach($array as $biburi) {
// (1) Get the context
if (!$this->cache[$biburi]) {
if (strpos($biburi, "http://") === 0)
$bibFile = $this->getCached($biburi, $timeout);
else {
$bibFile = $this->getDataFile("bib/$biburi");
}
if (!$bibFile || !file_exists($bibFile[0]))
continue;
$bibFile = $bibFile[0];
// (2) Parse the BibTeX
if (file_exists($bibFile)) {
$data = file_get_contents($bibFile);
if (!empty($data)) {
switch($this->options["bibtex_parser"]) {
case "papercite":
$parser = new BibTexEntries();
if (!$parser->parse($data)) {
$this->cache[$biburi] = false;
continue;
} else {
$this->cache[$biburi] = &$parser->data;
}
break;
default:
$this->_parser = new Structures_BibTex(array('removeCurlyBraces' => true, 'extractAuthors' => true));
$this->_parser->loadString($data);
$stat = $this->_parser->parse();
if ( !$stat ) return $this->cache[$biburi] = false;
$this->cache[$biburi] = &$this->_parser->data;
}
// --- Add custom fields
foreach($this->cache[$biburi] as &$entry) {
$this->checkFiles($entry, array(array("pdf", "pdf")));
}
}
}
}
// Add to the list
if ($this->cache[$biburi])
$result[] = $this->cache[$biburi];
}
if (sizeof($result) == 0) return false;
return $result;
}
/**
* Extracting the data of one entry
*
* @access private
* @param string $entry The entry
* @return array The representation of the entry or false if there is a problem
*/
static function _postProcessing(&$ret)
{
// Process accents
foreach ($ret as $key => &$value) {
if ($key != "entrytype" && $key != "bibtex" && $key != "cite") {
BibTexEntries::process_accents($value);
}
}
// Remove braces and handles capitalization
foreach (array("title", "booktitle") as $f) {
if (in_array($f, array_keys($ret))) {
$ret[$f] = BibTexEntries::formatTitle($ret[$f]);
}
}
// Handling pages
if (in_array('pages', array_keys($ret))) {
$matches = array();
if (preg_match("/^\\s*(\\d+)(?:\\s*--?\\s*(\\d+))?\\s*\$/", $ret['pages'], $matches)) {
$ret['pages'] = new BibtexPages($matches[1], $matches[2]);
}
}
//Handling the authors
if (in_array('author', array_keys($ret))) {
$ret['author'] = BibTexEntries::_extractAuthors($ret['author']);
}
//Handling the editors
if (in_array('editor', array_keys($ret))) {
$ret['editor'] = BibTexEntries::_extractAuthors($ret['editor']);
}
}
/**
* Get the bibtex data from an URI
*/
function &getData($biburis, $timeout = 3600)
{
global $wpdb, $papercite_table_name;
// Loop over the different given URIs
$array = explode(",", $biburis);
$result = array();
foreach ($array as $biburi) {
// (1) Get the context
$data = FALSE;
if (!$this->cache[$biburi]) {
if (strpos($biburi, "custom://") === 0) {
$data = get_post_custom_values("papercite_" . substr($biburi, 9));
if ($data) {
$data = $data[0];
}
} else {
if (strpos($biburi, "http://") === 0) {
$bibFile = $this->getCached($biburi, $timeout);
} else {
$bibFile = $this->getDataFile("bib/{$biburi}");
}
}
if ($data === FALSE && !($bibFile && file_exists($bibFile[0]))) {
continue;
}
// (2) Parse the BibTeX
if ($data || file_exists($bibFile[0])) {
if (!$data) {
$fileTS = filemtime($bibFile[0]);
// Check if we don't have the data in cache
if ($this->useDb()) {
// We use entrytype as a timestamp
$dbTS = intval($wpdb->get_var($wpdb->prepare("SELECT entrytype FROM {$papercite_table_name} WHERE url=%s and bibtexid=''", "ts://" . $biburi)));
if ($dbTS >= $fileTS) {
$result[$biburi] = $this->cache[$biburi] = "__DB__";
continue;
}
}
$data = file_get_contents($bibFile[0]);
}
if (!empty($data)) {
switch ($this->options["bibtex_parser"]) {
case "pear":
// Pear parser
$this->_parser = new Structures_BibTex(array('removeCurlyBraces' => true, 'extractAuthors' => true));
$this->_parser->loadString($data);
$stat = $this->_parser->parse();
if (!$stat) {
return $this->cache[$biburi] = false;
}
$this->cache[$biburi] =& $this->_parser->data;
break;
default:
// OSBiB parser
$parser = new BibTexEntries();
if (!$parser->parse($data)) {
$this->cache[$biburi] = false;
continue;
} else {
$this->cache[$biburi] =& $parser->data;
}
break;
}
// --- Add custom fields
foreach ($this->cache[$biburi] as &$entry) {
$this->checkFiles($entry, array(array("pdf", "pdf")));
}
// Save to DB
if (!$stringedFile && $this->useDb()) {
// First delete everything
$wpdb->query($wpdb->prepare("DELETE FROM {$papercite_table_name} WHERE url=%s", $biburi));
$code = true;
foreach ($this->cache[$biburi] as &$value) {
$statement = $wpdb->prepare("INSERT INTO {$papercite_table_name}(url, bibtexid, entrytype, year, data) VALUES (%s,%s,%s,%s,%s)", $biburi, $value["cite"], $value["entrytype"], $value["year"], maybe_serialize($value));
$code = $wpdb->query($statement);
if ($code === FALSE) {
break;
}
}
if ($code !== FALSE) {
$statement = $wpdb->prepare("INSERT INTO {$papercite_table_name}(url, bibtexid, entrytype) VALUES(%s,%s,%s)", "ts://" . $biburi, "", $fileTS);
$code = $wpdb->query($statement);
}
}
}
}
}
// Add to the list
if ($this->cache[$biburi]) {
$result[$biburi] = $this->cache[$biburi];
}
}
if (sizeof($result) == 0) {
return false;
}
return $result;
}
/**
* Extracting the data of one content
*
* @access private
* @param string $entry The entry
* @return array The representation of the entry or false if there is a problem
*/
static function _postProcessing(&$ret) {
// Process accents
foreach($ret as $key => &$value)
if ($key != "bibtex" && $key != "cite")
BibTexEntries::process_accents($value);
// Handling pages
if (in_array('pages', array_keys($ret))) {
$matches = array();
if (preg_match("/^\s*(\d+)(?:\s*--?\s*(\d+))?\s*$/", $ret['pages'], $matches)) {
$ret['pages'] = new BibtexPages($matches[1], $matches[2]);
}
}
//Handling the authors
if (in_array('author', array_keys($ret))) {
$ret['author'] = BibTexEntries::_extractAuthors($ret['author']);
}
//Handling the editors
if (in_array('editor', array_keys($ret))) {
$ret['editor'] = BibTexEntries::_extractAuthors($ret['editor']);
}
}