#!/usr/bin/perl -w
# -*- perl -*-
use P4CGI ;
use strict ;
#
#################################################################
#  CONFIGURATION INFORMATION 
#  All config info should be in P4CGI.pm
#
#################################################################
#
#  P4 label diff viewer
#  View diff between two labels
#
#################################################################

# Get arguments

				# Labels to diff
my $LABEL1 = P4CGI::cgi()->param("LABEL1") ;
my $LABEL2 = P4CGI::cgi()->param("LABEL2") ;

&P4CGI::error("No first label specified") unless defined $LABEL1 ;
#&P4CGI::error("No second label specified") unless defined $LABEL2 ;
$LABEL1 = &P4CGI::htmlEncode($LABEL1) ;
$LABEL2 = &P4CGI::htmlEncode($LABEL2) if defined $LABEL2 ;

# Set to true if we compare with current depot
my $compWithCurr = ! defined $LABEL2 ;

				# defined if files that are the same in both labels
				# should be listed
my $SHOWSAME = P4CGI::cgi()->param("SHOWSAME") ;
if(defined $SHOWSAME) { undef $SHOWSAME if $SHOWSAME ne "Y" ; } ;

				# defined if files that are not the same in botha labels
				# should be listed
my $SHOWNOTSAME = P4CGI::cgi()->param("SHOWNOTSAME") ;
if(defined $SHOWNOTSAME) { undef $SHOWNOTSAME if $SHOWNOTSAME ne "Y" ; } ;

				# defined if files that exists only in one of the labels
				# shold be displayed
my $SHOWDIFF = P4CGI::cgi()->param("SHOWDIFF") ;
if(defined $SHOWDIFF) { undef $SHOWDIFF if $SHOWDIFF ne "Y" ; } ;

sub compareFiles($$) {
    my ($a,$b) = @_ ;
    if(!defined $a) {
	return 1 ; # In this context an undef value is higher than any other
    }
    if(!defined $b) {
	return -1 ; 
    }
    if(&P4CGI::IGNORE_CASE() eq "Yes") {
	return uc($a) cmp uc($b) ;
    }
    else {
	return $a cmp $b ;
    }  ;
}

my $title = "<table><tr><td class=\"PageTitle\">Diff between</td><td> </td><td class=\"PageTitle\">" ;
$title .= "label <tt>$LABEL1</tt> and <br>label <tt>$LABEL2</tt>" if !$compWithCurr ;
$title .= "label <tt>$LABEL1</tt> and current depot" if $compWithCurr ;
$title .= "</td></tr></table>" ;

#
# Start page
#
print 
    &P4CGI::start_page($title),
    "<br>",
    &P4CGI::start_framedTable("Diff",""),

#
# Get basic data for labels
#
my %label1Data ;
my @fields = &P4CGI::p4readform("label -o '$LABEL1'",\%label1Data) ;

my %label2Data ;
if($compWithCurr) {
    my $f ;
    foreach $f (@fields) {
	$label2Data{$f} = " " ;
    } ;
    $label2Data{"View"} = $label1Data{"View"} ;
}
else {
    &P4CGI::p4readform("label -o '$LABEL2'",\%label2Data)
}


my $lab2hdr ;
$lab2hdr = "Label $LABEL2:" if !$compWithCurr ;
$lab2hdr = "Current depot:" if $compWithCurr ;

#
# Print basic label data
#
print "",			# Start table
    &P4CGI::start_table(""),
    &P4CGI::table_row("",
		      {-class=>"\"ListHeader\"",
		       -text=>"Label $LABEL1:"},
		      {-class=>"\"ListHeader\"",
		       -text=>$lab2hdr}) ;

my $f ;
shift @fields ; # remove "Label" from fields (redundant)
				# print label information
if(exists $label1Data{"Description"}) {
    $label1Data{"Description"} = 
	&P4CGI::formatDescription($label1Data{"Description"}) ;
}
if(exists $label2Data{"Description"}) {
    $label2Data{"Description"} = 
	&P4CGI::formatDescription($label2Data{"Description"}) ;
}

#
# Get files for labels
#
				# Get files
my (@filesLabel1,@filesLabel2);
&P4CGI::p4call(\@filesLabel1, "files \"\@$LABEL1\"" );
if($compWithCurr) {
    my @view = split("\n",$label1Data{"View"}) ;
    my $v ;
    my %tmph ;
    foreach $v (@view) {
	my @files ;
	&P4CGI::p4call(\@files, "files \"$v\"" );
	map { $tmph{$_} = 1 ; } @files ;
    }
    @filesLabel2 = keys %tmph ;
}
else {
    &P4CGI::p4call(\@filesLabel2, "files \"\@$LABEL2\"" );
}

				# Remove revision info and create file-to-rev maps
my (%fileRevLabel1,%fileRevLabel2) ;
map { s/\#(\d+).*// ; $fileRevLabel1{$_} = $1 } @filesLabel1 ;
map { s/\#(\d+).*// ; $fileRevLabel2{$_} = $1 } @filesLabel2 ;

				# Sort files
{
    my @tmp = @filesLabel1 ;
    @filesLabel1 = sort { compareFiles($a,$b) ; } @tmp ;
    @tmp =  @filesLabel2 ;
    @filesLabel2 = sort { compareFiles($a,$b) ; } @tmp ;
}
 
				# Get some statistics
my $commonFound=0 ;
my $commonAndSameRev=0 ;
{
    my $f ;
    foreach $f (@filesLabel1) {
	if(exists $fileRevLabel2{$f}) {
	    $commonFound++ ;
	    $commonAndSameRev++ if $fileRevLabel2{$f} == $fileRevLabel1{$f} ;
	}
    }
}
push @fields,"Files in label" ;
$label1Data{"Files in label"} = scalar @filesLabel1 . " files" ;
$label2Data{"Files in label"} = scalar @filesLabel2 . " files" ;

push @fields,"Common files" ;
$label1Data{"Common files"} = "$commonFound files in common" ;
$label2Data{"Common files"} = "" ;

push @fields,"Same revision" ;
$label1Data{"Same revision"} = "$commonAndSameRev files with same revision" ;
$label2Data{"Same revision"} = "" ;


				# Fix View field
{
    $label1Data{"View"} = "<tt>$label1Data{View}</tt>" ; 
    $label1Data{"View"} =~ s/\n/<br>/g ;
    $label2Data{"View"} = "<tt>$label2Data{View}</tt>" ; 
    $label2Data{"View"} =~ s/\n/<br>/g ;
}


foreach $f (@fields) {
    my $f1 = $label1Data{$f} ;
    my $f2 = $label2Data{$f} ;
    my %x ;
    $x{class} = "Description" if $f eq "Description"  ;
    if($f2 ne "") {
	$f1 = {%x,
	       -text    => "$f1"} ;
	$f2 = {%x,
	       -text    => "$f2"} ;
    }
    else {
	$f2 = {%x,
	       -align => "\"center\"",
	       -text    =>"$f1"} ;
	$f1 = undef ;
    }
    print "",&P4CGI::table_row({-class => "\"Prompt\"",
				-text  => "$f"},
			       $f1,
			       $f2) ;    
} ;

print "",
    &P4CGI::end_table(),
    "<hr>";
    
my ($nfiles1,$nfiles2) ;
$nfiles1 = @filesLabel1 ;
$nfiles2 = @filesLabel2 ;
    
my $fileslisted = "Yes" ; 

sub printTableLine($$$$) {
    my $file = shift @_ ;
    my $rev1 = shift @_ ;
    my $diff = shift @_ ;
    my $rev2 = shift @_ ;
    print &P4CGI::table_row($file,
			    {-text=>$rev1,
			     -align=>"center"},
			    $diff,
			    {-text=>$rev2,
			     -align=>"center"}) ;
} ;

if($commonFound == 0) {
    print 
	"The two labels have no files in common," ;
}
else {
    print &P4CGI::start_framedTable("Files:") ;
    if(defined $SHOWSAME and defined $SHOWNOTSAME and defined $SHOWDIFF) {
	print "Files:<br>\n" ;
    }
    elsif(!defined $SHOWSAME and !defined $SHOWNOTSAME and !defined $SHOWDIFF) {
	print "No files listed!<br>\n" ;
	$fileslisted = undef ;
    }
    else {
	print "Listed files are:<br><ul>\n" ;
	defined $SHOWSAME and do { 
	    print "<LI> Files not modified\n" ; } ;
	defined $SHOWNOTSAME and do { 
	    print "<LI> Modified files (different rev.)\n" ; } ;
	defined $SHOWDIFF and do {
	    if($compWithCurr) {
		print "<LI> Files only in label $LABEL1 or current depot\n" ; 
	    }
	    else {
		print "<LI> Files only in label $LABEL1 or $LABEL2\n" ; 
	    } ;
	} ;
	print "</ul>\n" ;
    } ;
    
#
# Start print list of files
#
    if(defined $fileslisted) {
	print 
	    "",
	    &P4CGI::start_table(""),
	    &P4CGI::table_row("-type","th",
			      "File","$LABEL1","",$lab2hdr) ;
	
	my ($name1,$name2) ;
	while(@filesLabel1 > 0 or @filesLabel2 > 0) { 
	    $name1 = shift @filesLabel1 unless defined $name1 ;
	    $name2 = shift @filesLabel2 unless defined $name2 ;
	    my $rev1 = $fileRevLabel1{$name1} if defined $name1 ;
	    my $rev2 = $fileRevLabel2{$name2} if defined $name2 ;
	    
	    my $rev1Text = &P4CGI::ahref(-url=>"fileViewer.cgi",
					 "FSPC=$name1",
					 "REV=$rev1",
					 "HELP=View file $name1\#$rev1",
					 "\#$rev1") if defined $name1 ;
	    my $rev2Text = &P4CGI::ahref(-url=>"fileViewer.cgi",
					 "FSPC=$name2",
					 "REV=$rev2",
					 "HELP=View file $name2\#$rev2",
					 "\#$rev2") if defined $name2 ;
	    my $name1Text = &P4CGI::ahref(-url => "fileLogView.cgi",
					  "FSPC=$name1",
					  "HELP=View file log",
					  "$name1") if defined $name1 ;
	    my $name2Text = &P4CGI::ahref(-url => "fileLogView.cgi",
					  "FSPC=$name2",
					  "HELP=View file log",
					  "$name2") if defined $name2 ;	    

	    my $cmp = compareFiles($name1,$name2) ;
	    if($cmp == 0) {
		if($rev1 == $rev2 and defined $SHOWSAME) {
		    printTableLine($name1Text,
				   $rev1Text,
				   "",
				   $rev2Text) ;
		}
		if($rev1 != $rev2 and defined $SHOWNOTSAME) {		    
		    printTableLine($name1Text,
				   $rev1Text,
				   &P4CGI::ahref(-url=>"fileDiffView.cgi",
						 "FSPC=$name1",
						 "REV=$rev1",
						 "REV2=$rev2",
						 "ACT=edit",	
						 "HELP=Show Diff",
						 "<small>diff</small>"),
				   $rev2Text) ;
		}
		$name1 = undef ;
		$name2 = undef ;
		next ;
	    }
	    if($cmp < 0) {
		if(defined $SHOWDIFF) {
		    printTableLine($name1Text,
				   $rev1Text,
				   "",
				   "<font color=red size=-1>--</font>") ;
		}
		$name1=undef ;
		next ;
	    }
	    else {
		if(defined $SHOWDIFF) {
		    printTableLine($name2Text,
				   "<font color=red size=-1>--</font>",
				   "",
				   $rev2Text) ;
		}
		$name2=undef ;
		next ;
	    }
	}
	print
	    &P4CGI::end_table(),
	    &P4CGI::end_framedTable() ;
    }
}
print
    &P4CGI::end_framedTable(),
    &P4CGI::end_page() ;

#
# That's all folks
#