#!perl -w
# Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
# All rights reserved.
# This component and the accompanying materials are made available
# under the terms of the License "Eclipse Public License v1.0"
# which accompanies this distribution, and is available
# at the URL "http://www.eclipse.org/legal/epl-v10.html".
# 
# Initial Contributors:
# Nokia Corporation - initial contribution.
# 
# Contributors:
# 
# Description:
# 
#

use strict;
use FindBin;
use lib "$FindBin::Bin";
use Getopt::Long;
use IniData;
use EnvDb;
use CommandController;


#
# Globals.
#

my $verbose = 0;
my $iniData = IniData->New();
my $commandController = CommandController->New($iniData, 'LatestVer');
my $envDb; # this is only created when needed, by the EnvDb() function
my $listAll;
my $userComp;
my $everyComponent;
my $versionFilter;


#
# Main.
#

ProcessCommandLine();
PrintLatestVersions();

#
# Subs.
#

sub ProcessCommandLine {
  Getopt::Long::Configure ("bundling");
  my $help;
  GetOptions('h' => \$help, 'a:i' => \$listAll, 'v+' => \$verbose, 'f=s' => \$versionFilter);

  if ($help) {
    Usage(0);
  }

  $userComp = shift @ARGV || undef;

  unless ($#ARGV == -1) {
    print "Error: Invalid arguments\n";
    Usage(1);
  }
}

sub Usage {
  my $exitCode = shift;

  Utils::PrintDeathMessage($exitCode, "\nUsage: latestver [options] [component] 

options:

-h   help
-a   lists all versions in descending date order
-a 6 list the most recent six versions
-v   verbose output (-vv very verbose, -vvv very very verbose)
-f <version wildcard> only show versions whose version numbers match that text\n");
}

sub PrintLatestVersions {
  # Convert the version number filter from glob-style to perl-style RE
  if (defined $versionFilter) {
		require Text::Glob;
		# Surprisingly complicated to convert a glob-style to a perl-style RE
		# Hence we use a module. Not entirely convinced that Text::Glob
		# does a particularly good job (e.g. the pattern t_make*[0] doesn't work)
		# but it's better than my attempts, and should suffice for most cases.
		$versionFilter = Text::Glob::glob_to_regex($versionFilter);
	}

  # First work out what components we need to process
  my @compsToProcess;
  if ($userComp) {
    @compsToProcess = ($userComp);
  } else {
    # Call listcomponents with remote flag set as 0 and continue flag set as 1
    @compsToProcess = sort @{$iniData->PathData->ListComponents(0,1)};
  }

  # Second work out what versions we need to process
  my @compVersions; # contains lots of [ comp_name, reldata ]
  foreach my $compName (@compsToProcess) {
    foreach (@{GetRelevantRelDataObjects($compName, $versionFilter)}) {
      push @compVersions, [ $compName, $_ ];
    }
  }

  die "No versions were found.\n" unless (@compVersions);

  # Third work out how verbose to make the output, and do it!
  if ($verbose) {
    my @tableData;
    InsertTableHeadings(\@tableData);
    AddTableEntry($$_[0], \@tableData, $$_[1]) foreach (@compVersions);
    print "\n";
    $iniData->TableFormatter->PrintTable(\@tableData, 1);
  } else {
    PrintMinimalVerbosity($$_[0], $$_[1]) foreach (@compVersions);
  }
}

sub PrintMinimalVerbosity {
  my $comp = shift;
  my $reldata = shift;

  my $ver = $reldata->Version();
  if ($userComp) {
    print "$ver\n";
  } else {
    print "$comp: $ver\n";
  }
}

sub GetRelevantRelDataObjects {
  my $comp = shift;
  my $ver = shift;

  my $shownum = $listAll;
  $shownum = 1 unless defined $listAll;

  my $relDataObjects = RelData->OpenSet($iniData, $comp, $verbose, $ver);
  $relDataObjects ||= [];
  splice(@$relDataObjects, $shownum) unless (scalar @$relDataObjects == 0) || ($shownum==0) || ($shownum > @$relDataObjects); # if showNum==0, we got just -a so show all
  
  return $relDataObjects;
}

sub InsertTableHeadings {
  my $tableData = shift;

  my @headings;
  @headings = ('Version', 'Internal version', 'Project', 'Releaser', 'Date');
  if ($verbose > 1) {
    @headings = ('', @headings);
  }
  if ($verbose > 2) {
    @headings = (@headings, 'Local path', 'Remote path');
  }
  if (!$userComp) {
    @headings = ('Component', @headings);
  }
  push @$tableData, \@headings;
}

sub AddTableEntry {
  my $comp = shift;
  my $tableData = shift;
  my $relData = shift;

  my @fields;

  my $ver = $relData->Version();
  my $releaser = $relData->NotesSource()->{releaser};
  chomp $releaser;
  my $project = $iniData->PathData->ComponentProject($comp, $ver);
  @fields = ($ver, $relData->InternalVersion(), $project, $releaser, $relData->NotesSource()->{date});

  # We're being very verbose, so add a 'status' field
  if ($verbose > 1) {
    my $status = "";
    # "Installed" flag
    #
    my $installedversion = EnvDb()->Version($comp);
    $status .= "I" if ($installedversion && $installedversion eq $ver);

    # "Exported" flag
    my $remotePath||="";
    eval {
      my $remoteSite = $iniData->RemoteSite(0); # 0 = not verbose
      if ($remoteSite) {
        $remotePath = $iniData->PathData->RemoteArchivePathForExistingComponent
          ($comp, $ver, $remoteSite);
        $status .= "E" if ($remotePath && $remoteSite->FileExists("$remotePath/$comp$ver.zip") );
      }
    };

    unshift @fields, $status;

    if ($verbose > 2) {
      # We're being extravagently verbose, so add two 'location' fields which will 
      # wrap off the end of the line - sigh.
      my $localPath = '"'. $iniData->PathData->LocalArchivePathForExistingComponent
        ($comp, $ver) .'"';
      $remotePath = '"'.$remotePath.'"' if ($remotePath);
      $remotePath ||= '';
      $localPath ||= '';
      @fields = (@fields, $localPath, $remotePath);
    }
  }

  # If we're listing several components, stick a field on the front
  # saying which component we're talking about in this case
  if (!$userComp) {
    unshift @fields, $comp;
  }
  push @$tableData, \@fields;
}

sub EnvDb {
  $envDb ||= EnvDb->Open($iniData, $verbose);
}

__END__

=head1 NAME

LatestVer - Prints the latest version of a particular component.

=head1 SYNOPSIS

  latestver [options] [component]

options:

  -h   help
  -a   lists all versions in descending date order
  -a <n>  lists the most recent 'n' versions in descending date order
  -v   verbose output (-vv very verbose, -vvv very very verbose)
  -f <wildcard> filter the versions displayed

=head1 DESCRIPTION

Prints the latest version of a particular component, or all known components if the component name is omitted. Optionally prints all versions in descending date order.

If verbose output is requested, the internal version number, storage area ("project"), releaser's name and release time is also displayed.

If very verbose output is requested, and the remote site is set in the reltools.ini file, a "flags" column will be shown with two possible letters:

=over 4

=item I

This version is installed on your machine.

=item E

This version is exported.

=back

Using the -vv option may significantly increase the time this tool takes to run.

If very very verbose is requested the local path is also output to screen.

If you specify a -f version string then only versions whose version numbers contain that wildcard will be shown. The wildcard should be a glob-style regular expression (for example "*chinese*"). It is case-insensitive.

If very very verbose output is requested, two more fields will show the location of the release on the local and remote archives.

=head1 KNOWN BUGS

None.

=head1 COPYRIGHT

 Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
 All rights reserved.
 This component and the accompanying materials are made available
 under the terms of the License "Eclipse Public License v1.0"
 which accompanies this distribution, and is available
 at the URL "http://www.eclipse.org/legal/epl-v10.html".
 
 Initial Contributors:
 Nokia Corporation - initial contribution.
 
 Contributors:
 
 Description:
 

=cut