;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name: pubmed-src.lisp
;;;; Purpose: Library to access PubMed web application
;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Jun 2001
;;;;
;;;; $Id: pubmed-src.lisp,v 1.3 2003/06/20 08:35:22 kevin Exp $
;;;;
;;;; This file, part of cl-pubmed, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
;;;; cl-pubmed users are granted the rights to distribute and use this software
;;;; as governed by the terms of the GNU Lesser General Public License
;;;; (http://www.gnu.org/licenses/lgpl.html)
;;;; *************************************************************************
(in-package #:pubmed)
(defparameter +pubmed-host+ "www.ncbi.nlm.nih.gov")
(defparameter +pubmed-query-url+ "/entrez/utils/pmqty.fcgi")
(defparameter +pubmed-fetch-url+ "/entrez/utils/pmfetch.fcgi")
(define-condition pubmed-condition ()
())
(define-condition pubmed-server-error (error pubmed-condition)
((response :initarg :response
:initform nil
:reader pubmed-condition-response))
(:report (lambda (c stream)
(format stream "A PubMed server error occurred.")
(awhen (pubmed-condition-response c)
(format stream " The server response was:~&~S" it)))))
(define-condition pubmed-query-error (error pubmed-condition)
((response :initarg :response
:initform nil
:reader pubmed-condition-response))
(:report (lambda (c stream)
(format stream "A PubMed server error occurred.")
(awhen (pubmed-condition-response c)
(format stream " The server response was:~&~S" it)))))
;;; Article-Set and Article Classes
(defclass pm-article-set ()
((query :type string :initarg :query :accessor articles-query)
(articles :type list :initarg :articles :accessor articles)
(total :type fixnum :initarg :total :accessor articles-total)
(count :type fixnum :initarg :count :accessor articles-count)
(start :type fixnum :initarg :start :accessor articles-start))
(:documentation "Pubmed Article Set Class")
(:default-initargs :total 0 :start 0 :count 0
:query nil :articles nil))
(defclass pm-article ()
(
(pmid :type integer :accessor article-pmid)
(title :type string :accessor article-title)
(authors :type list :accessor article-authors)
(affiliation :type string :accessor article-affiliation)
(journal :type string :accessor article-journal)
(date :type string :accessor article-date)
(volume :type string :accessor article-volume)
(issue :type string :accessor article-issue)
(pages :type string :accessor article-pages)
(abstract :type string :accessor article-abstract)
(mesh-headings :type list :accessor article-mesh-headings))
(:documentation "Pubmed Article Class"))
(defmethod print-object ((obj pm-article-set) (s stream))
(print-unreadable-object (obj s :type t :identity t)
(format s "~d total articles, ~d articles starting at #~d"
(articles-total obj)
(articles-count obj)
(articles-start obj)
)))
(defmethod print-object ((obj pm-article) (s stream))
(print-unreadable-object (obj s :type t :identity t)
(format s "pmid:~d, title:~S" (article-pmid obj)
(article-title obj))))
(defun article-equal-p (a b)
(check-type a pm-article)
(check-type b pm-article)
(eql (article-pmid a) (article-pmid b)))
(defun article-ref (art)
"Return a string of publication data for an article"
(let ((ref ""))
(awhen (article-date art)
(string-append ref (format nil "~a; " it)))
(awhen (article-volume art)
(string-append ref it))
(awhen (article-issue art)
(string-append ref (format nil "(~a)" it)))
(awhen (article-pages art)
(string-append ref (format nil ":~a" it)))
ref))
(defmethod print-article-set ((artset pm-article-set)
&key (os *standard-output*) (format :text)
(complete nil) (print-link nil))
"Display an article set to specified stream in specified format"
(dotimes (i (articles-count artset) artset)
(if (nth i (articles artset))
(print-article (nth i (articles artset)) :os os :format format
:complete complete :print-link print-link)
(princ "NULL Article" os))))
(defmethod print-article ((art pm-article) &key (os *standard-output*)
(format :text) (complete nil) (print-link nil))
"Display an article"
(ecase format
(:text
(format os "~a~%~a~%~a~a ~a~%~a~%"
(article-title art)
(list-to-delimited-string (article-authors art) ", ")
(aif (article-affiliation art)
(format nil "~a~%" it) "")
(article-journal art) (article-ref art)
(aif (article-abstract art)
(if complete
it
"Abstract available")
"No abstract available")
(when complete
(format os "~a~%" (article-mesh-headings art)))))
(:html
(let ((has-link (or (article-abstract art) (article-mesh-headings art))))
(when (and print-link has-link)
(format os "" (funcall print-link
(article-pmid art))))
(format os "~a
~%"
(article-title art))
(when (and print-link has-link)
(format os ""))
(format os "
~a
~%"
(list-to-delimited-string (article-authors art) ", "))
(format os "~a ~a
~%"
(article-journal art) (article-ref art))
(when (and complete (article-abstract art))
(format os "~a
~%"
(article-abstract art)))
(when (and complete (article-mesh-headings art))
(format os "Mesh Headings:
")
(dolist (mh (article-mesh-headings art))
(format os "~a
~%" mh)))
(format os "~%"))))
art)
;;; PubMed Query Functions
(defun pm-query (searchstr &key maximum start)
"Performs PubMed query and fetch and returns article-set structure"
(multiple-value-bind
(results status)
(pubmed-search-xml searchstr :maximum maximum :start start)
(when (xml-tag-contents "Count" status)
(let ((as (make-instance 'pm-article-set)))
(setf
(articles-total as) (parse-integer (xml-tag-contents "Count" status))
(articles-query as) searchstr
(articles-start as) (parse-integer (xml-tag-contents "DispStart" status))
(articles-count as) (parse-integer (xml-tag-contents "DispMax" status))
(articles as) (extract-article-set results))
as))))
(defun pm-fetch-ids (pmids)
"Fetchs list of Pubmed ID's and returns pm-article-set class"
(setq pmids (mklist pmids))
(let ((results (pubmed-fetch-pmids-xml pmids)))
(unless (xml-tag-contents "Error" results)
(let ((as (make-instance 'pm-article-set)))
(setf
(articles-total as) (length pmids)
(articles-query as) (list-to-delimited-string pmids #\,)
(articles-start as) 0
(articles-count as) (length pmids)
(articles as) (extract-article-set results))
as))))
#+ignore
(defun pubmed-search-tree (searchstr &key maximum start)
"Performs a pubmed search and returns two values:
tree of PubMed search results and tree of PubMed search status"
(multiple-value-bind
(xml-search-results xml-search-status)
(pubmed-search-xml searchstr :maximum maximum :start start)
(if xml-search-results
(values (parse-xml-no-ws xml-search-results)
(parse-xml-no-ws xml-search-status))
(values nil (parse-xml-no-ws xml-search-status)))))
(defun pubmed-search-xml (searchstr &key maximum start)
"Performs a Pubmed search and returns two values:
XML string of PubMed search results and XML search status"
(multiple-value-bind
(pmids search-status)
(pubmed-query-xml searchstr :maximum maximum :start start)
(values (pubmed-fetch-pmids-xml pmids) search-status)))
(defun pubmed-query-xml (searchstr &key maximum start)
"Performs a Pubmed search and returns two values:
list of PubMed ID's that match search string and XML search status"
(let ((search-results (pubmed-query-status searchstr :maximum maximum :start start)))
(values (extract-pmid-list search-results) search-results)))
(defun pubmed-query-status (searchstr &key start maximum)
"Performs a Pubmed search and returns XML results of PubMed search
which contains PubMed ID's and status results"
(let ((query-alist `(("db" . "m") ("term" . ,searchstr) ("mode" . "xml"))))
(when maximum (push (cons "dispmax" maximum) query-alist))
(when start (push (cons "dispstart" start) query-alist))
(net.aserve.client:do-http-request
(format nil "http://~a~a" +pubmed-host+ +pubmed-query-url+)
:method :get
:query query-alist)))
(defun pubmed-fetch-pmids-xml (pmids)
"Fetch articles for a list of PubMed ID's and return XML string"
(setq pmids (mklist pmids)) ;; Ensure list
(when pmids
(net.aserve.client:do-http-request
(format nil "http://~a~a" +pubmed-host+ +pubmed-fetch-url+)
:method :get
:query
`(("db" . "PubMed") ("report" . "xml") ("mode" . "text")
("id" . ,(list-to-delimited-string pmids #\,))))))
;;; XML Extraction Routines
(defun extract-article-set (results)
"Extract article set from PubMed XML string, return results in pm-article-set class"
(multiple-value-bind (as-start as-end as-next)
(positions-xml-tag-contents "PubmedArticleSet" results)
(declare (ignore as-end as-next))
(when as-start
(let ((done nil)
(articles '())
(pos as-start))
(until done
(multiple-value-bind
(a-start a-end a-next)
(positions-xml-tag-contents "PubmedArticle" results pos)
(if a-start
(progn
(push (extract-article results a-start a-end) articles)
(setq pos a-next)
)
(setq done t))))
(nreverse articles)))))
(defun extract-article (xmlstr a-start a-end)
"Extract article contents from PubMed XML string and return results in pm-article class"
(let ((article (make-instance 'pm-article)))
(setf
(article-pmid article) (parse-integer (xml-tag-contents "PMID" xmlstr a-start a-end))
(article-title article) (xml-tag-contents "ArticleTitle" xmlstr a-start a-end)
(article-journal article) (xml-tag-contents "MedlineTA" xmlstr a-start a-end)
(article-pages article) (xml-tag-contents "MedlinePgn" xmlstr a-start a-end)
(article-affiliation article) (xml-tag-contents "Affiliation" xmlstr a-start a-end)
(article-abstract article) (xml-tag-contents "AbstractText" xmlstr a-start a-end))
(multiple-value-bind (ji-start ji-end ji-next)
(positions-xml-tag-contents "JournalIssue" xmlstr a-start a-end)
(declare (ignore ji-next))
(setf
(article-volume article) (xml-tag-contents "Volume" xmlstr ji-start ji-end)
(article-issue article) (xml-tag-contents "Issue" xmlstr ji-start ji-end))
(aif (xml-tag-contents "MedlineDate" xmlstr ji-start ji-end)
(setf (article-date article) it)
(setf (article-date article)
(concatenate 'string (xml-tag-contents "Year" xmlstr ji-start ji-end)
(aif (xml-tag-contents "Month" xmlstr ji-start ji-end)
(format nil " ~a" it)
"")))))
(multiple-value-bind (al-start al-end al-next)
(positions-xml-tag-contents "AuthorList" xmlstr a-start a-end)
(declare (ignore al-next))
(setf (article-authors article)
(when al-start
(let ((done nil)
(authors '())
(pos al-start))
(until done
(multiple-value-bind
(au-start au-end au-next)
(positions-xml-tag-contents "Author" xmlstr pos al-end)
(if au-start
(progn
(push (extract-author xmlstr au-start au-end) authors)
(setq pos au-next))
(setq done t))))
(nreverse authors)))))
(multiple-value-bind (mhl-start mhl-end mhl-next)
(positions-xml-tag-contents "MeshHeadingList" xmlstr a-start a-end)
(declare (ignore mhl-next))
(setf (article-mesh-headings article)
(when mhl-start
(let ((done nil)
(mesh-headings '())
(pos mhl-start))
(until done
(multiple-value-bind
(mh-start mh-end mh-next)
(positions-xml-tag-contents "MeshHeading" xmlstr pos mhl-end)
(if mh-start
(progn
(push (extract-mesh-heading xmlstr mh-start mh-end) mesh-headings)
(setq pos mh-next)
)
(setq done t))))
(nreverse mesh-headings)))))
article))
(defun extract-author (xmlstr start end)
"Extract author name from XML string"
(let ((last-name (xml-tag-contents "LastName" xmlstr start end))
(initials (xml-tag-contents "Initials" xmlstr start end)))
(concatenate 'string last-name " " initials)))
(defun extract-mesh-heading (xmlstr start end)
"Extract and format mesh headings from XML string"
(let ((desc (xml-tag-contents "DescriptorName" xmlstr start end))
(sh (xml-tag-contents "SubHeading" xmlstr start end)))
(if sh
(format nil "~a(~a)" desc sh)
desc)))
(defun extract-pmid-list (results)
"Returns list of PubMed ID's from XML result string"
(cond
((search "" results)
(error 'pubmed-query-error :response results))
((search "Server Error
" results)
(error 'pubmed-server-error :response results))
(t
(awhen (xml-tag-contents "Id" results)
(delimited-string-to-list it #\space)))))