434 lines
14 KiB
PHP
434 lines
14 KiB
PHP
<?php
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/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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/**
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* Description of citation
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*
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* @author may
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*/
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class citation {
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// entry point to parse citations. Type is needed.
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public static function parse ($citation, $type) {
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$record = -1;
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// check for DOI first
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// skip for speed
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$record = citation::_checkDOI($citation);
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// we don't have DOI
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if ($record == -1) {
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// while type is hardcoded here due to obvious reasons,
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// friendly names can indeed be changed in the DB
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switch ($type) {
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case 1:
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// Journal article
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$record = citation::_journal2arr($citation);
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break;
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case 2:
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// Book
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$record = citation::_book2arr($citation);
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break;
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case 3:
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// Work paper
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$record = citation::_workpaper2arr($citation);
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break;
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case 4:
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// Conference paper
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$record = citation::_conference2arr($citation);
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break;
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case 5:
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// Report
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$record = citation::_report2arr($citation);
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break;
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case 6:
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// Thesis
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$record = citation::_thesis2arr($citation);
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break;
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case 8:
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// chapter
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$record = citation::_chapter2arr($citation);
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break;
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default:
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case 7: // project
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case 9: // ESRA paper
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case 10: // newspaper, magazine articles
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case 11: // manuscripts
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return -2;
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break;
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}
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}
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return $record;
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}
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private static function _checkDOI ($citation) {
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$_d = -1;
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$doi = -1;
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// check for DOI (must be at the end of citation!)
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preg_match ('/(.*)doi:(.*)/i', $citation, $hits);
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if (count($hits) == 3) {
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$doi = trim($hits[2], " \n\r\t\v\0.");
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}
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preg_match ('/(.*)doi.org\/(.*)/', $citation, $hits);
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if (count($hits) == 3) {
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$doi = trim($hits[2], " \n\r\t\v\0.");
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}
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if ($doi != -1) {
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$_d = doi::fetchData($doi);
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}
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return $_d;
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}
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private static function _book2arr ($citation) {
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$back = -1;
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/*
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* Authors (YEAR). TITLE. City: Publisher.
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*/
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*[^.]+|.*[^?]+)' // title in form 'title.' or 'title?' OR 'title (series)'. Two dots are a problem, sugest changing it to : .
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.'[\.?]' //
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.'(.*?[^\:]+)' // City
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.'[\:]' // series OR dot.
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.'(.*?[^\.]+)' // publisher
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.'.*' // junk
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.'/', $citation, $hits);
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// If everything's OK, we get size of 6
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if (count($hits)==6) {
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$hits = citation::_trim ($hits);
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$back = array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3],
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'city' => $hits[4],
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'publisher' => $hits[5]);
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if (strpos ($hits[3], '(')!==false) {
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$tmp = explode ('(', $hits[3]);
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$back['title'] = trim($tmp[0]);
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$back['series'] = trim($tmp[1], " \(\)\n\r\t\{\}\,\.");
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}
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}
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return $back;
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}
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private static function _trim ($arr) {
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$back = array();
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foreach ($arr as $offset=>$line) {
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$line = trim($line, " \n\r\t\{\}\,\.");
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$line = rtrim($line, "(");
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$line = rtrim($line, " ");
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$line = rtrim($line, ",");
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$line = ltrim($line, ")");
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$line = ltrim($line, " ");
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$back[$offset] = ltrim($line, ",");
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}
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return $back;
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}
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private static function _journal2arr ($citation) {
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/*
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// Authors (year). title. journal, i(v), pages.
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*
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*/
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if (substr ($citation, -1)!='.') {
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$citation .= '.';
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}
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*[^.]+|.*[^?]+)' // title in form 'title.' or 'title?'
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.'[\.?]'
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.'(.*?[^0-9]+)' // journal (some have commas, so until ( or digit (pages, volume,...)
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.'(.*?[^,]+)' // vol/issue (match until comma)
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.'\,'
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.'(.*?[^\.\,]+)' // pages (match against , or .)
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.'(\.|,)' // check for size
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.'(.*)' // check for size
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.'/', $citation, $hits);
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if (count($hits) == 9) {
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$hits = citation::_trim($hits);
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return array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3],
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'journal' => $hits[4],
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'issue' => $hits[5],
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'pages' => $hits[6]
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);
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}
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else {
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// plan B:
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// retrieve authors, year, title, journal and leave the rest.
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*?[^.]+|.*?[^?]+)' // title in form 'title.' or 'title?'
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.'[\.?]'
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.'(.*?[^.]+|.*?[^,]+)' // journal in form 'title.' or 'title?'
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.'[\.,]'
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.'(.*)' // check for size
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.'/', $citation, $hits);
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if (count($hits) == 6 && trim($hits[4]!="")) {
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$hits = citation::_trim($hits);
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return array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3],
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'journal' => $hits[4]
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);
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}
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else {
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echo "\n***Journal article not recognised***\n";
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print_r ($hits);
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return -1;
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}
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}
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}
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private static function _workpaper2arr ($citation) {
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/*
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* This is problematic, as there are many different forms (citation styles).
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* We're taking Authors (Year). Title. Series. publisher
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*/
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// let's just take out fields 1-3 (authors, year, title (whatever it is)
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*[^.]+|.*[^?]+)' // title in form 'title.' or 'title?'
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.'[\.?]'
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.'(.*?[^\.]+)' // series
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.'\.'
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/* .'(.*?[^\.]+)' // publisher
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.'[\.]' // check for size */
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.'(.*)' // check for size
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.'/', $citation, $hits);
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$hits = citation::_trim($hits);
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// field 3 can be broken. Manual fix needed.
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return array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3]
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);
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}
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private static function _conference2arr ($citation) {
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/*
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* This is problematic, as there are many different forms (citation styles).
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* We're taking Authors (Year). Title. - same as working paper
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*/
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// let's just take out fields 1-3 (authors, year, title (whatever it is)
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*[^.]+|.*[^?]+)' // title in form 'title.' or 'title?'
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.'[\.?]'
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.'(.*) for the' //
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.'(.*?[^,]+)'
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.','
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.'(.*)' // check for size
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.'/', $citation, $hits);
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$hits = citation::_trim($hits);
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// field 3 can be broken. Manual fix needed.
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return array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3],
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'conference' => $hits[5],
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'city' => $hits[6]
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);
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}
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private static function _report2arr ($citation) {
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// this is a mess.
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// it is most often AUTHORS (YEAR).
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// but what's next is... random.
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// title. title. publisher.
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// or
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// title. series. publisher.
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// or
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// title. title. series. publisher.
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// or title in series ....
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// let's just take authors, year, [*], publisher
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$back = -1;
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/*
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* Authors (YEAR). TITLE. REPORT_TYPE. Publisher.
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*/
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*[^.])' // title in form 'title.' or 'title?'
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.'\.'
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.'(?:(.*?[^\.]+)\.(.*?[^\.]+))|(.*?[^\.]+)' // title in form 'title.' or 'title?' OR 'title (series)'. Two dots are a problem, sugest changing it to : .
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.'\.'
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.'(.*)' // rest
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.'/', $citation, $hits);
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// If everything's OK, we get size of 6
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if (count($hits)==6) {
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$hits = citation::_trim ($hits);
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$back = array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3],
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'publisher' => $hits[4]);
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}
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return $back;
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}
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private static function _thesis2arr ($citation) {
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$back = -1;
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/*
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*
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* Authors (YEAR). TITLE. TYPE. PUBLISHER.
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*/
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*[^.]+|.*[^?]+)' // title in form 'title.' or 'title?'
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.'[\.?]'
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.'(.*[^.]+|.*[^,]+)' // type
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.'[\.\,]'
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.'(.*[^.]+)' // location
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.'\.'
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.'(.*)' // rest
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.'/', $citation, $hits);
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// If everything's OK, we get size of 6
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if (count($hits)==7) {
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$hits = citation::_trim ($hits);
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$back = array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3],
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'thesis_type' => $hits[4],
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'publisher' => $hits[5]);
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}
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return $back;
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}
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private static function _chapter2arr ($citation) {
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$back = -1;
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/*
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* Authors (YEAR). TITLE. WHERE (pp) publisher)
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*/
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preg_match ('/(.*?[^(]+)' // authors - before (
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. '\(' // (
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.'([0-9]?[^)]+)' // year - digits before )
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. '\)\.' // ).
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.'(.*[^.]+|.*[^?]+) in ' // title in form 'title. IN' or 'title? IN'
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// .'([\.?] in )'
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.'(.*?[^)]+)' // book author before )
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. '\)' // ).
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// .'(.*)\(pp' // book
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.'(.*)\bpp' // book
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.'(.*?[^)]+)' // pps
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. '\)[\.\,]' // ).
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.'(.*[^\:]+)' // location
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.'\:'
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.'(.*)' // publisher
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.'/i', $citation, $hits);
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// If everything's OK, we get size of 6
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if (count($hits)==9) {
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$hits = citation::_trim ($hits);
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$back = array (
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'author' => $hits[1],
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'year' => $hits[2],
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'title' => $hits[3],
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'book_author' => trim(preg_replace ('/(.*?[^(]+)(.*)/', '$1',$hits[4])),
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'booktitle' => trim ($hits[5], " \n\r\t\v\0("),
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'pages' => $hits[6],
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'location' => $hits[7],
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'publisher' => $hits[8]);
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}
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else {
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print_r ($hits);
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}
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return $back;
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}
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}
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