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#!/usr/bin/perl |
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#-------------------------------------------------------------------------- |
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# |
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# Author: Dobrica Pavlinusic |
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# Creation Date: 2002-03-17 |
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#-------------------------------------------------------------------------- |
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# |
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# Description: |
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# |
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# This package implements the various filters for this database |
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# |
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#-------------------------------------------------------------------------- |
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# |
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# Pragmatic modules |
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# |
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use strict; |
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#-------------------------------------------------------------------------- |
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# |
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# Package definition |
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# |
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package default; |
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#-------------------------------------------------------------------------- |
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# |
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# Application Constants |
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# |
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#-------------------------------------------------------------------------- |
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# |
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# Function: DocumentParser() |
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# |
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# Purpose: This function serves as a document parser |
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# |
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# Called by: DocumentFilter(), SummaryFilter() |
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# |
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# Parameters: $Database Database name |
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# $DocumentID Document ID |
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# $ItemName Item name |
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# $MimeType Mime type |
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# $DocumentRaw Raw document text |
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# |
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# Global Variables: |
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# |
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# Returns: A hash table of the document fields |
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# |
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sub DocumentParser { |
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my ($Database, $DocumentID, $ItemName, $MimeType, $DocumentRaw) = @_; |
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my (%Document, @DocumentLines, $DocumentLine); |
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my ($FieldTag, $FieldData, $Separator); |
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@DocumentLines = split(/\n/, $DocumentRaw); |
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# Extract the document |
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foreach $DocumentLine ( @DocumentLines ) { |
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# check if this is a new field? |
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if ( $DocumentLine =~ /%(\S+)\s*(.*)/ ) { |
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$FieldTag = $1; |
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$FieldData = $2; |
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if ($default::Separator{$FieldTag}) { |
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$Separator = $default::Separator{$FieldTag}; |
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} else { |
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$Separator = ";"; |
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} |
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} |
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else { |
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$FieldData = $DocumentLine; |
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$Separator = "\n"; |
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} |
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if ( defined($Document{$FieldTag}) ) { |
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$Document{$FieldTag} .= $Separator . $FieldData; |
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} |
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else { |
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$Document{$FieldTag} = $FieldData; |
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} |
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} |
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return (%Document); |
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} |
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#-------------------------------------------------------------------------- |
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# |
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# Function: DocumentFilter() |
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# |
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# Purpose: This function is the document filter |
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# |
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# Called by: external |
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# |
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# Parameters: $Database Database name |
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# $DocumentID Document ID |
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# $ItemName Item name |
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# $MimeType Mime type |
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# $DocumentRaw Raw document text |
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# |
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# Global Variables: %default::FieldNames, @default::FieldDisplayOrder |
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# |
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# Returns: The filtered document |
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# |
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sub DocumentFilter { |
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my ($Database, $DocumentID, $ItemName, $MimeType, $DocumentRaw) = @_; |
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my (%Document, $DocumentFinal, $FieldTag, $CommaFlag); |
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my ($SearchTerm, @Authors, $Author, @AuthorNames, $AuthorName, @Keywords, $Keyword, @OrderNumbers, $OrderNumber); |
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if ( !defined($DocumentRaw) ) { |
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return (undef); |
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} |
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%Document = &DocumentParser($Database, $DocumentID, $ItemName, $MimeType, $DocumentRaw); |
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$DocumentFinal = "<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=2 WIDTH=100%> \n"; |
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# $DocumentFinal .= "<TR><TD COLSPAN=2 VALIGN=TOP ALIGN=CENTER><H3> $Document{'T'} </H3></TD></TR> \n"; |
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# Loop over each line in the document list |
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foreach $FieldTag ( @default::FieldDisplayOrder ) { |
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# print "-- $FieldTag = $Document{$FieldTag} --"; |
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# Skip empty slots |
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if ( !(defined($Document{$FieldTag}) && ($Document{$FieldTag} ne "")) ) { |
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next; |
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} |
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# Print the row start |
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$DocumentFinal .= "<TR><TD VALIGN=TOP ALIGN=RIGHT BGCOLOR=\"#EEEEEE\" WIDTH=\"130\"> $default::FieldNames{$FieldTag}: </TD><TD VALIGN=TOP ALIGN=LEFT> "; |
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sub html_enc { |
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my $tmp = $_[0]; |
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$tmp =~ s/&/&/g; |
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$tmp =~ s/</</g; |
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$tmp =~ s/>/>/g; |
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# fix some tags |
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$tmp =~ s/<br>/<br>/gi; |
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return $tmp; |
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} |
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# format URI |
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if ( $FieldTag eq "856" ) { |
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my $alt = $Document{$FieldTag}; |
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if (length $alt > $default::max_display_url_len ) { |
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$alt = substr($alt,0,$default::max_display_url_len)."..."; |
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} |
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my $url = $Document{$FieldTag}; |
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$url =~ s/"/%22/g; # save " from URLs |
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$DocumentFinal .= "<A HREF=\"$url\" TARGET=\"BlankWindow\">$alt</A>"; |
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} else { |
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$DocumentFinal .= html_enc($Document{$FieldTag}); |
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} |
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$DocumentFinal .= "</TD></TR> \n"; |
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} |
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# List any external links we may have |
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if ( defined($Document{'G'}) ) { |
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@OrderNumbers = split(/; /, $Document{'G'}); |
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$DocumentFinal .= "<TR><TD COLSPAN=2> <HR WIDTH=50%> </TD></TR>"; |
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$DocumentFinal .= "<TR><TD VALIGN=TOP ALIGN=LEFT> <B> External Links: </B> </TD><TD VALIGN=TOP ALIGN=LEFT><UL>"; |
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foreach $OrderNumber ( @OrderNumbers ) { |
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if ( $OrderNumber =~ /ISBN\s*(\S*)/ ) { |
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$OrderNumber = $1; |
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$OrderNumber =~ s/-//g; |
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$DocumentFinal .= "<LI><A HREF=\"http://www.amazon.com/exec/obidos/ASIN/$OrderNumber\" TARGET=\"BlankWindow\"> Get this book from Amazon.com </A></LI>"; |
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$DocumentFinal .= "<LI><A HREF=\"http://search.borders.com/fcgi-bin/db2www/search/search.d2w/Details?mediaType=Book&searchType=ISBNUPC&code=$OrderNumber\" TARGET=\"BlankWindow\"> Get this book from Borders </A></LI>"; |
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$DocumentFinal .= "<LI><A HREF=\"http://shop.barnesandnoble.com/bookSearch/isbnInquiry.asp?isbn=$OrderNumber\" TARGET=\"BlankWindow\"> Get this book from Barnes & Noble </A></LI>"; |
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} |
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} |
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$DocumentFinal .= "</UL></TD></TR>"; |
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} |
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$DocumentFinal .= "</TABLE> \n"; |
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return ($DocumentFinal); |
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} |
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#-------------------------------------------------------------------------- |
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# |
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# Function: SummaryFilter() |
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# |
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# Purpose: This function is the summary filter |
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# |
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# Called by: external |
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# |
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# Parameters: $Database Database name |
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# $DocumentID Document ID |
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# $ItemName Item name |
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# $MimeType Mime type |
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# $DocumentRaw Raw document text |
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# |
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# Global Variables: none |
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# |
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# Returns: The filtered summary |
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# |
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sub SummaryFilter { |
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my ($Database, $DocumentID, $ItemName, $MimeType, $DocumentRaw) = @_; |
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my (%Document, $Summary); |
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if ( !defined($DocumentRaw) ) { |
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return (undef); |
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} |
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# Parse the document |
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%Document = &DocumentParser($Database, $DocumentID, $ItemName, $MimeType, $DocumentRaw); |
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# Select the abstract if available |
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if ( defined($Document{'X'}) ) { |
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$Summary = $Document{'X'}; |
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} |
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# Select the table of contents if available |
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elsif ( defined($Document{'Y'}) ) { |
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$Summary = $Document{'Y'}; |
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} |
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# Select the keywords if available |
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elsif ( defined($Document{'K'}) ) { |
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$Summary = $Document{'K'}; |
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} |
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# Clean the summary text |
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if ( defined($Summary) ) { |
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# First clean up the text |
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if ( index($Summary, "\r\n") >= 0 ) { |
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$Summary =~ s/\r//gs; |
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} |
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elsif ( index($Summary, "\r") >= 0 ) { |
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$Summary =~ s/\r/\n/gs; |
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} |
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$Summary =~ s/\n/ /gs; |
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$Summary =~ s/\s+/ /gs; |
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$Summary = ucfirst($Summary); |
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} |
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return ($Summary); |
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} |
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#-------------------------------------------------------------------------- |
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# |
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# Function: RelevanceFeedbackFilter() |
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# |
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# Purpose: This function is the relevance feedback filter |
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# |
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# Called by: external |
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# |
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# Parameters: $Database Database name |
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# $DocumentID Document ID |
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# $ItemName Item name |
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# $MimeType Mime type |
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# $DocumentRaw Raw document text |
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# |
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# Global Variables: none |
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# |
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# Returns: The filtered relevance feedback |
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# |
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sub RelevanceFeedbackFilter { |
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my ($Database, $DocumentID, $ItemName, $MimeType, $DocumentRaw) = @_; |
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my (%Document, $RelevanceFeedback); |
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if ( !defined($DocumentRaw) ) { |
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return (undef); |
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} |
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# Parse the document |
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%Document = &DocumentParser($Database, $DocumentID, $ItemName, $MimeType, $DocumentRaw); |
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# Select the abstract if available |
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if ( defined($Document{'X'}) ) { |
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$RelevanceFeedback = $Document{'X'}; |
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} |
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# Select the table of contents if available |
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elsif ( defined($Document{'Y'}) ) { |
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$RelevanceFeedback = $Document{'Y'}; |
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} |
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# Select the keywords if available |
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elsif ( defined($Document{'K'}) ) { |
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$RelevanceFeedback = $Document{'K'}; |
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} |
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# Select the title if available |
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elsif ( defined($Document{'T'}) ) { |
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$RelevanceFeedback = $Document{'T'}; |
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} |
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# Select the author if available |
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elsif ( defined($Document{'A'}) ) { |
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$RelevanceFeedback = $Document{'A'}; |
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} |
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return ($RelevanceFeedback); |
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} |
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#-------------------------------------------------------------------------- |
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