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);

# set the version for version checking
$VERSION = 3.00;

=head1 NAME

C4::Branch - Koha branch module

=head1 SYNOPSIS

use C4::Branch;

=head1 DESCRIPTION

The functions in this module deal with branches.

=head1 FUNCTIONS

=cut

@ISA    = qw(Exporter);
@EXPORT = qw(
   &GetBranchCategory
   &GetBranchName
   &GetBranch
   &GetBranches
   &GetBranchDetail
   &get_branchinfos_of
   &ModBranch
   &CheckBranchCategorycode
   &GetBranchInfo
   &GetCategoryTypes
   &GetBranchCategories
   &GetBranchesInCategory
   &ModBranchCategoryInfo
   &DelBranch
   &DelBranchCategory
);

=head2 GetBranches

  $branches = &GetBranches();
  returns informations about ALL branches.
  Create a branch selector with the following code
  IndependantBranches Insensitive...
  GetBranchInfo() returns the same information without the problems of this function 
  (namespace collision, mainly).  You should probably use that, and replace GetBranches()
  with GetBranchInfo() where you see it in the code.
  
=head3 in PERL SCRIPT

my $branches = GetBranches;
my @branchloop;
foreach my $thisbranch (keys %$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>

=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 $query="SELECT * from branches";
    if ($onlymine && C4::Context->userenv && C4::Context->userenv->{branch}){
      $query .= " WHERE branchcode =".$dbh->quote(C4::Context->userenv->{branch});
    }
    $query.=" order by branchname";
    $sth = $dbh->prepare($query);
    $sth->execute;
    while ( my $branch = $sth->fetchrow_hashref ) {
        my $nsth =
          $dbh->prepare(
            "select categorycode from branchrelations where branchcode = ?");
        $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 );
}

=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;
    my $sth    = $dbh->prepare("replace branchcategories (categorycode,categoryname,codedescription,categorytype) values (?,?,?,?)");
    $sth->execute(uc( $data->{'categorycode'} ),$data->{'categoryname'}, $data->{'codedescription'},$data->{'categorytype'} );
    $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;
}



=head1 AUTHOR

Koha Developement team <info@koha.org>

=cut