package C4::Branch;

# This file is part of Koha.
#
# Koha 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.
#
# Koha 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
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA


use strict;
require Exporter;
use C4::Context;
use C4::Koha;

use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);

BEGIN {
	# set the version for version checking
	$VERSION = 3.02;
	@ISA    = qw(Exporter);
	@EXPORT = qw(
		&GetBranchCategory
		&GetBranchName
		&GetBranch
		&GetBranches
		&GetBranchesLoop
		&GetBranchDetail
		&get_branchinfos_of
		&ModBranch
		&CheckBranchCategorycode
		&GetBranchInfo
		&GetCategoryTypes
		&GetBranchCategories
		&GetBranchesInCategory
		&ModBranchCategoryInfo
		&DelBranch
		&DelBranchCategory
	);
	@EXPORT_OK = qw( &onlymine );
}

=head1 NAME

C4::Branch - Koha branch module

=head1 SYNOPSIS

use C4::Branch;

=head1 DESCRIPTION

The functions in this module deal with branches.

=head1 FUNCTIONS

=head2 GetBranches

  $branches = &GetBranches();

  Returns informations about ALL branches, IndependantBranches Insensitive.
  GetBranchInfo() returns the same information without the problems of this function 
  (namespace collision, mainly).
  Create a branch selector with the following code.
  
=head3 in PERL SCRIPT

    my $branches = GetBranches;
    my @branchloop;
    foreach my $thisbranch (sort keys %$branches) {
        my $selected = 1 if $thisbranch eq $branch;
        my %row =(value => $thisbranch,
                    selected => $selected,
                    branchname => $branches->{$thisbranch}->{branchname},
                );
        push @branchloop, \%row;
    }

=head3 in TEMPLATE

    <select name="branch">
        <option value="">Default</option>
        <!-- TMPL_LOOP name="branchloop" -->
        <option value="<!-- TMPL_VAR name="value" -->" <!-- TMPL_IF name="selected" -->selected<!-- /TMPL_IF -->><!-- TMPL_VAR name="branchname" --></option>
        <!-- /TMPL_LOOP -->
    </select>

=head4 Note that you often will want to just use GetBranchesLoop, for exactly the example above.

=cut

sub GetBranches {
    my ($onlymine)=@_;
    # returns a reference to a hash of references to ALL branches...
    my %branches;
    my $dbh = C4::Context->dbh;
    my $sth;
    my $query="SELECT * FROM branches";
    my @bind_parameters;
    if ($onlymine && C4::Context->userenv && C4::Context->userenv->{branch}){
      $query .= ' WHERE branchcode = ? ';
      push @bind_parameters, C4::Context->userenv->{branch};
    }
        $query.=" ORDER BY branchname";
    $sth = $dbh->prepare($query);
    $sth->execute( @bind_parameters );

    my $nsth = $dbh->prepare(
        "SELECT categorycode FROM branchrelations WHERE branchcode = ?"
    );  # prepare once, outside while loop

    while ( my $branch = $sth->fetchrow_hashref ) {
        $nsth->execute( $branch->{'branchcode'} );
        while ( my ($cat) = $nsth->fetchrow_array ) {
            # FIXME - This seems wrong. It ought to be
            # $branch->{categorycodes}{$cat} = 1;
            # otherwise, there's a namespace collision if there's a
            # category with the same name as a field in the 'branches'
            # table (i.e., don't create a category called "issuing").
            # In addition, the current structure doesn't really allow
            # you to list the categories that a branch belongs to:
            # you'd have to list keys %$branch, and remove those keys
            # that aren't fields in the "branches" table.
         #   $branch->{$cat} = 1;
            $branch->{category}{$cat} = 1;
        }
        $branches{ $branch->{'branchcode'} } = $branch;
    }
    return ( \%branches );
}

sub onlymine {
    return 
    C4::Context->preference('IndependantBranches') &&
    C4::Context->userenv                           &&
    C4::Context->userenv->{flags}!=1               &&
    C4::Context->userenv->{branch}                 ;
}

sub GetBranchesLoop (;$$) {  # since this is what most pages want anyway
    my $branch   = @_ ? shift : '';     # optional first argument is branchcode of "my branch", if preselection is wanted.
    my $onlymine = @_ ? shift : onlymine();
    my $branches = GetBranches($onlymine);
    my @loop;
    foreach (sort { $branches->{$a}->{branchname} cmp $branches->{$b}->{branchname} } keys %$branches) {
        push @loop, {
            value => $_,
            selected => ($_ eq $branch) ? 1 : 0, 
            branchname => $branches->{$_}->{branchname},
        };
    }
    return \@loop;
}

=head2 GetBranchName

=cut

sub GetBranchName {
    my ($branchcode) = @_;
    my $dbh = C4::Context->dbh;
    my $sth;
    $sth = $dbh->prepare("Select branchname from branches where branchcode=?");
    $sth->execute($branchcode);
    my $branchname = $sth->fetchrow_array;
    $sth->finish;
    return ($branchname);
}

=head2 ModBranch

&ModBranch($newvalue);

This function modify an existing branches.

C<$newvalue> is a ref to an array wich is containt all the column from branches table.

=cut

sub ModBranch {
    my ($data) = @_;
    
    my $dbh    = C4::Context->dbh;
    if ($data->{add}) {
        my $query  = "
            INSERT INTO branches
            (branchcode,branchname,branchaddress1,
            branchaddress2,branchaddress3,branchphone,
            branchfax,branchemail,branchip,branchprinter)
            VALUES (?,?,?,?,?,?,?,?,?,?)
        ";
        my $sth    = $dbh->prepare($query);
        $sth->execute(
            $data->{'branchcode'},       $data->{'branchname'},
            $data->{'branchaddress1'},   $data->{'branchaddress2'},
            $data->{'branchaddress3'},   $data->{'branchphone'},
            $data->{'branchfax'},        $data->{'branchemail'},
            $data->{'branchip'},         $data->{'branchprinter'},
        );
    } else {
        my $query  = "
            UPDATE branches
            SET branchname=?,branchaddress1=?,
                branchaddress2=?,branchaddress3=?,branchphone=?,
                branchfax=?,branchemail=?,branchip=?,branchprinter=?
            WHERE branchcode=?
        ";
        my $sth    = $dbh->prepare($query);
        $sth->execute(
            $data->{'branchname'},
            $data->{'branchaddress1'},   $data->{'branchaddress2'},
            $data->{'branchaddress3'},   $data->{'branchphone'},
            $data->{'branchfax'},        $data->{'branchemail'},
            $data->{'branchip'},         $data->{'branchprinter'},
            $data->{'branchcode'},
        );
    }
    # sort out the categories....
    my @checkedcats;
    my $cats = GetBranchCategory();
    foreach my $cat (@$cats) {
        my $code = $cat->{'categorycode'};
        if ( $data->{$code} ) {
            push( @checkedcats, $code );
        }
    }
    my $branchcode = uc( $data->{'branchcode'} );
    my $branch     = GetBranchInfo($branchcode);
    $branch = $branch->[0];
    my $branchcats = $branch->{'categories'};
    my @addcats;
    my @removecats;
    foreach my $bcat (@$branchcats) {

        unless ( grep { /^$bcat$/ } @checkedcats ) {
            push( @removecats, $bcat );
        }
    }
    foreach my $ccat (@checkedcats) {
        unless ( grep { /^$ccat$/ } @$branchcats ) {
            push( @addcats, $ccat );
        }
    }
    foreach my $cat (@addcats) {
        my $sth =
          $dbh->prepare(
"insert into branchrelations (branchcode, categorycode) values(?, ?)"
          );
        $sth->execute( $branchcode, $cat );
        $sth->finish;
    }
    foreach my $cat (@removecats) {
        my $sth =
          $dbh->prepare(
            "delete from branchrelations where branchcode=? and categorycode=?"
          );
        $sth->execute( $branchcode, $cat );
        $sth->finish;
    }
}

=head2 GetBranchCategory

$results = GetBranchCategory($categorycode);

C<$results> is an ref to an array.

=cut

sub GetBranchCategory {

    # returns a reference to an array of hashes containing branches,
    my ($catcode) = @_;
    my $dbh = C4::Context->dbh;
    my $sth;

    #    print DEBUG "GetBranchCategory: entry: catcode=".cvs($catcode)."\n";
    if ($catcode) {
        $sth =
          $dbh->prepare(
            "select * from branchcategories where categorycode = ?");
        $sth->execute($catcode);
    }
    else {
        $sth = $dbh->prepare("Select * from branchcategories");
        $sth->execute();
    }
    my @results;
    while ( my $data = $sth->fetchrow_hashref ) {
        push( @results, $data );
    }
    $sth->finish;

    #    print DEBUG "GetBranchCategory: exit: returning ".cvs(\@results)."\n";
    return \@results;
}

=head2 GetBranchCategories

  my $categories = GetBranchCategories($branchcode,$categorytype);

Returns a list ref of anon hashrefs with keys eq columns of branchcategories table,
i.e. categorycode, categorydescription, categorytype, categoryname.
if $branchcode and/or $categorytype are passed, limit set to categories that
$branchcode is a member of , and to $categorytype.

=cut

sub GetBranchCategories {
    my ($branchcode,$categorytype) = @_;
	my $dbh = C4::Context->dbh();
	my $query = "SELECT c.* FROM branchcategories c";
	my (@where, @bind);
	if($branchcode) {
		$query .= ",branchrelations r, branches b ";
		push @where, "c.categorycode=r.categorycode and r.branchcode=? ";  
		push @bind , $branchcode;
	}
	if ($categorytype) {
		push @where, " c.categorytype=? ";
		push @bind, $categorytype;
	}
	$query .= " where " . join(" and ", @where) if(@where);
	$query .= " order by categorytype,c.categorycode";
	my $sth=$dbh->prepare( $query);
	$sth->execute(@bind);
	
	my $branchcats = $sth->fetchall_arrayref({});
	$sth->finish();
	return( $branchcats );
}

=head2 GetCategoryTypes

$categorytypes = GetCategoryTypes;
returns a list of category types.
Currently these types are HARDCODED.
type: 'searchdomain' defines a group of agencies that the calling library may search in.
Other usage of agency categories falls under type: 'properties'.
	to allow for other uses of categories.
The searchdomain bit may be better implemented as a separate module, but
the categories were already here, and minimally used.
=cut

	#TODO  manage category types.  rename possibly to 'agency domains' ? as borrowergroups are called categories.
sub GetCategoryTypes() {
	return ( 'searchdomain','properties');
}

=head2 GetBranch

$branch = GetBranch( $query, $branches );

=cut

sub GetBranch ($$) {
    my ( $query, $branches ) = @_;    # get branch for this query from branches
    my $branch = $query->param('branch');
    my %cookie = $query->cookie('userenv');
    ($branch)                || ($branch = $cookie{'branchname'});
    ( $branches->{$branch} ) || ( $branch = ( keys %$branches )[0] );
    return $branch;
}

=head2 GetBranchDetail

  $branchname = &GetBranchDetail($branchcode);

Given the branch code, the function returns the corresponding
branch name for a comprehensive information display

=cut

sub GetBranchDetail {
    my ($branchcode) = @_;
    my $dbh = C4::Context->dbh;
    my $sth = $dbh->prepare("SELECT * FROM branches WHERE branchcode = ?");
    $sth->execute($branchcode);
    my $branchname = $sth->fetchrow_hashref();
    $sth->finish();
    return $branchname;
}

=head2 get_branchinfos_of

  my $branchinfos_of = get_branchinfos_of(@branchcodes);

Associates a list of branchcodes to the information of the branch, taken in
branches table.

Returns a href where keys are branchcodes and values are href where keys are
branch information key.

  print 'branchname is ', $branchinfos_of->{$code}->{branchname};

=cut

sub get_branchinfos_of {
    my @branchcodes = @_;

    my $query = '
    SELECT branchcode,
       branchname
    FROM branches
    WHERE branchcode IN ('
      . join( ',', map( { "'" . $_ . "'" } @branchcodes ) ) . ')
';
    return C4::Koha::get_infos_of( $query, 'branchcode' );
}


=head2 GetBranchesInCategory

  my $branches = GetBranchesInCategory($categorycode);

Returns a href:  keys %$branches eq (branchcode,branchname) .

=cut

sub GetBranchesInCategory($) {
    my ($categorycode) = @_;
	my @branches;
	my $dbh = C4::Context->dbh();
	my $sth=$dbh->prepare( "SELECT b.branchcode FROM branchrelations r, branches b 
							where r.branchcode=b.branchcode and r.categorycode=?");
    $sth->execute($categorycode);
	while (my $branch = $sth->fetchrow) {
		push @branches, $branch;
	}
	$sth->finish();
	return( \@branches );
}

=head2 GetBranchInfo

$results = GetBranchInfo($branchcode);

returns C<$results>, a reference to an array of hashes containing branches.
if $branchcode, just this branch, with associated categories.
if ! $branchcode && $categorytype, all branches in the category.
=cut

sub GetBranchInfo {
    my ($branchcode,$categorytype) = @_;
    my $dbh = C4::Context->dbh;
    my $sth;


	if ($branchcode) {
        $sth =
          $dbh->prepare(
            "Select * from branches where branchcode = ? order by branchcode");
        $sth->execute($branchcode);
    }
    else {
        $sth = $dbh->prepare("Select * from branches order by branchcode");
        $sth->execute();
    }
    my @results;
    while ( my $data = $sth->fetchrow_hashref ) {
		my @bind = ($data->{'branchcode'});
        my $query= "select r.categorycode from branchrelations r";
		$query .= ", branchcategories c " if($categorytype);
		$query .= " where  branchcode=? ";
		if($categorytype) { 
			$query .= " and c.categorytype=? and r.categorycode=c.categorycode";
			push @bind, $categorytype;
		}
        my $nsth=$dbh->prepare($query);
		$nsth->execute( @bind );
        my @cats = ();
        while ( my ($cat) = $nsth->fetchrow_array ) {
            push( @cats, $cat );
        }
        $nsth->finish;
        $data->{'categories'} = \@cats;
        push( @results, $data );
    }
    $sth->finish;
    return \@results;
}

=head2 DelBranch

&DelBranch($branchcode);

=cut

sub DelBranch {
    my ($branchcode) = @_;
    my $dbh = C4::Context->dbh;
    my $sth = $dbh->prepare("delete from branches where branchcode = ?");
    $sth->execute($branchcode);
    $sth->finish;
}

=head2 ModBranchCategoryInfo

&ModBranchCategoryInfo($data);
sets the data from the editbranch form, and writes to the database...

=cut

sub ModBranchCategoryInfo {
    my ($data) = @_;
    my $dbh    = C4::Context->dbh;
	if ($data->{'add'}){
		# we are doing an insert
		my $sth   = $dbh->prepare("INSERT INTO branchcategories (categorycode,categoryname,codedescription,categorytype) VALUES (?,?,?,?)");
		$sth->execute(uc( $data->{'categorycode'} ),$data->{'categoryname'}, $data->{'codedescription'},$data->{'categorytype'} );
		$sth->finish();		
	}
	else {
		# modifying
		my $sth = $dbh->prepare("UPDATE branchcategories SET categoryname=?,codedescription=?,categorytype=? WHERE categorycode=?");
		$sth->execute($data->{'categoryname'}, $data->{'codedescription'},$data->{'categorytype'},uc( $data->{'categorycode'} ) );
		$sth->finish();
	}
}

=head2 DeleteBranchCategory

DeleteBranchCategory($categorycode);

=cut

sub DelBranchCategory {
    my ($categorycode) = @_;
    my $dbh = C4::Context->dbh;
    my $sth = $dbh->prepare("delete from branchcategories where categorycode = ?");
    $sth->execute($categorycode);
    $sth->finish;
}

=head2 CheckBranchCategorycode

$number_rows_affected = CheckBranchCategorycode($categorycode);

=cut

sub CheckBranchCategorycode {

    # check to see if the branchcode is being used in the database somewhere....
    my ($categorycode) = @_;
    my $dbh            = C4::Context->dbh;
    my $sth            =
      $dbh->prepare(
        "select count(*) from branchrelations where categorycode=?");
    $sth->execute($categorycode);
    my ($total) = $sth->fetchrow_array;
    return $total;
}

1;
__END__

=head1 AUTHOR

Koha Developement team <info@koha.org>

=cut