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# ShellShark's CMS |
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# Content Management System engine for ShellShark Networks, Inc. |
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# Copyright (c)2005 ShellShark Networks, Inc. All rights reserved. |
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package WWW::CMS; |
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use warnings; |
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use strict; |
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use POSIX qw( strftime ); |
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sub new { |
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# Create a new WWW::CMS instance |
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# Takes a hash of arguments containing Base and Module |
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# Returns an object reference on success, nothing on failure |
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my $self = { }; |
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my ( $class, $args ) = @_; |
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# Bless me father, for I have OOP'ed |
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bless $self, $class; |
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# Is our template basedir defined, and does it exist? |
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if ( !$args->{ TemplateBase } || !-d $args->{ TemplateBase } ) { |
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print STDERR "WWW::CMS: Fatal error: Template base directory not defined or does not exist!\n"; |
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return; |
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} |
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# Strip trailing slash from template basedir |
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$args->{ TemplateBase } =~ s/\/$//; |
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# Is our template module defined, and does it exist? |
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if ( !$args->{ Module } || !-f "$args->{ TemplateBase }/$args->{ Module }" ) { |
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print STDERR "WWW::CMS: Fatal error: Template module not defined or not found\n"; |
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return; |
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} |
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# Open the template and shove it in memory |
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open my $fh, "<", "$args->{ TemplateBase }/$args->{ Module }" || sub { |
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$self->{ ERRMSG } = "Failed to open template module '$args->{ TemplateBase }/$args->{ Module }': $!"; |
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return; |
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}; |
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# Slurpy, slurpy.... |
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$self->{ template } = do { local $/; <$fh> }; |
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close $fh; |
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# Stuff our arguments into our namespace |
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$self->{ TemplateBase } = $args->{ TemplateBase }; |
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# Give this instance the template module's name for later identification, if needed |
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$self->{ instance } = $args->{ Module }; |
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# Setup a heap for arbitrary variable storage for IF/ELSE operators in templates |
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$self->{ heap } = { }; |
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return $self; |
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} |
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sub publicize { |
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# Find / replace all instances of built-in tags with output of respective code |
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my $self = shift; |
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# Pass in an existing CGI object |
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my $query = shift || sub { |
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$self->{ ERRSTR } = 'CGI object not passed into publicize()'; |
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return; |
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}; |
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# Many thanks to revdiablo for making this uberleet regex |
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$self->{ template } =~ s{ |
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\Q^^[\E # start operator block |
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(IF|WHILE) # operator name |
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\Q]=\E # start condition |
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([^\n]*) # condition expression |
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\Q^^\E # end condition |
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((?:.(?!\^\^))*.) # contents |
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(?: \Q^^[ELSE]^^\E # start optional else block |
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((?:.(?!\^\^))*.) # contents |
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)? # ensure it is optional |
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\Q^^[END]^^\E # end operator block |
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} |
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{ |
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$self->tempeval($1, $2, $3, $4) |
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}gisex; |
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$self->{ PageName } = '' unless $self->{ PageName }; |
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$self->{ template } =~ s/%%PAGE%%/$self->{ PageName }/gi; |
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my $ts = strftime ( "%A, %B %e, %G - %I:%M%p", localtime ); |
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$self->{ template } =~ s/%%DATETIME%%/$ts/gi; |
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if ( $self->{ content } ) { |
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my $tmpcont = join ( "\n", @{ $self->{ content } } ); |
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$self->{ template } =~ s/%%CONTENT%%/$tmpcont/gi; |
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} |
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my $url = $query->url(); |
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$self->{ template } =~ s/%%MYURL%%/$url/gi; |
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return $self->{ template }; |
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} |
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sub repl_tag { |
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# Find / replace all instances of a given tag with the output of a given coderef |
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my ( $self, $var, $coderef ) = @_; |
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# See how many find/replace operations will have to take place |
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# Evaluate the code once, and cache the output to save overhead |
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my $output = $coderef->(); |
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# In the template, find $var (CaSE sEnsiTiVE!) and replace it with $output |
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$self->{ template } =~ s/$var/$output/g; |
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return 1; |
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} |
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sub tempeval { |
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# Many thanks again to revdiablo for creating this initially as a stub |
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# to show me how the hell his funky regex works ;-) |
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my ( $self, $op, $exp, $true, $false ) = @_; |
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if ( $op =~ /^IF$/i ) { |
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if ( $self->{heap}->{$exp} ) { |
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return "\n$true"; |
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} |
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else { |
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return "\n$false"; |
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} |
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} |
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} |
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1; |