#!/usr/bin/perl -w

###########################################################################
#
# full-import.pl -- runs import.pl with -incremental option on
# A component of the Greenstone digital library software
# from the New Zealand Digital Library Project at the 
# University of Waikato, New Zealand.
#
# Copyright (C) 2009 New Zealand Digital Library Project
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
###########################################################################


# This program is designed to support incremental building of Greenstone
# Runs:        import.pl -incremental ...



BEGIN {
    die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
    die "GSDLOS not set\n" unless defined $ENV{'GSDLOS'};
    unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
}


use strict;

use Config; # for getting the perlpath in the recommended way
use dbutil;
use util;
use colcfg;

sub main
{
    my ($argc,@argv) = @_;

    if (($argc==0)  || (($argc==1) && ($argv[0] =~ m/^--?h(elp)?$/))) {
	my ($progname) = ($0 =~ m/^.*[\/|\\](.*?)$/);


	print STDERR "\n";
	print STDERR "Usage: $progname [import.pl options] collection\n";
	print STDERR "\n";

	exit(-1);
    }


    my $collection = pop @argv;

    my @filtered_argv = ();

    my $collect_dir = undef;
    my $archive_dir  = undef;
    my $site = undef;
    my $manifest = undef;

    while (my $arg = shift @argv) {
	# No actual filtering happens at the moment (@filterd_argv == @argv)
	# Useful to do it this way if we want incremental-import.pl
	# to start accepting its own arguments that are different to import.pl
	
	if ($arg eq "-collectdir") {
	    $collect_dir = shift @argv;
	    push(@filtered_argv,$arg,$collect_dir);
	}
	elsif ($arg eq "-archivedir") {
	    $archive_dir = shift @argv;
	    push(@filtered_argv,$arg,$archive_dir);
	}
	elsif ($arg eq "-site") {
	    $site = shift @argv;
	    push(@filtered_argv,$arg,$site);
	}
	elsif ($arg eq "-manifest") {
	    $manifest = shift @argv;
	    push(@filtered_argv,$arg,$manifest);
	}
	else {
	    push(@filtered_argv,$arg);
	}
    }
	
    # get and check the collection name
    if ((&colcfg::use_collection($site, $collection, $collect_dir)) eq "") {
	print STDERR "Unable to use collection \"$collection\" within \"$collect_dir\"\n";
	exit -1;
    }
    my $gs_mode = "gs2";
    if ((defined $site) && ($site ne "")) {
	$gs_mode = "gs3";
    }
    
    if (!defined $archive_dir) {
	$archive_dir = &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, "archives");
    }
    my $etcdir = &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, "etc");
    # BACKWARDS COMPATIBILITY: Just in case there are old .ldb/.bdb files (won't do anything for other infodbtypes)
    &util::rename_ldb_or_bdb_file(&util::filename_cat($archive_dir, "archiveinf-doc"));
    
    my $col_cfg_file;
    if ($gs_mode eq "gs3") {
	$col_cfg_file = &util::filename_cat($etcdir, "collectionConfig.xml");
    } else {
	$col_cfg_file = &util::filename_cat($etcdir, "collect.cfg");
    }

    my $collect_cfg = &colcfg::read_collection_cfg ($col_cfg_file, $gs_mode);
    # get the database type for this collection from its configuration file (may be undefined)
    my $infodbtype = $collect_cfg->{'infodbtype'} || &dbutil::get_default_infodb_type();
    $infodbtype = "gdbm" if $infodbtype eq "gdbm-txtgz";
    my $archiveinf_doc_file_path = &dbutil::get_infodb_file_path($infodbtype, "archiveinf-doc", $archive_dir);

    my $quoted_argv = join(" ", map { "\"$_\"" } @filtered_argv);
    

    my $import_cmd = "import.pl";
    if($ENV{'PERLPATH'}) {
	# need to ensure that the path to perl is quoted (in case there's spaces in it)
	if($ENV{'GSDLOS'} =~ m/windows/) {
	    $import_cmd = "\"$ENV{'PERLPATH'}\\Perl.exe\" -S $import_cmd";
	} else {
	    $import_cmd = "\"$ENV{'PERLPATH'}/perl\" -S $import_cmd";
	}
    } else {
	#Config{perlpath}, like $^X, is a special variable containing the full path to the current perl executable we are in
	$import_cmd = "\"$Config{perlpath}\" -S $import_cmd";
    }

    if (defined $manifest) {
	# manifest files need -keepold not -incremental
	$import_cmd .= " -keepold";
    } else {
	if (-e $archiveinf_doc_file_path) {
	    $import_cmd .= " -incremental";
	    
	}
	else {
	    print STDERR "*****\n";
	    print STDERR "First time import. Switching to full import.pl.\n";
	    print STDERR "*****\n";
	    $import_cmd .= " -removeold";
	}
    }
    $import_cmd .= " $quoted_argv \"$collection\"";

    
    my $import_status = system($import_cmd)/256;
    
    if ($import_status != 0) {
	print STDERR "Error: Failed to run: $import_cmd\n";
	print STDERR "       $!\n" if ($! ne "");
	exit(-1);
    }
}

&main(scalar(@ARGV),@ARGV);