[freeside.git] / FS / FS / cust_main.pm

package FS::cust_main;

use strict;
use vars qw( @ISA $conf $Debug $import );
use Safe;
use Carp;
use Time::Local;
use Date::Format;
#use Date::Manip;
use Business::CreditCard;
use FS::UID qw( getotaker dbh );
use FS::Record qw( qsearchs qsearch dbdef );
use FS::cust_pkg;
use FS::cust_bill;
use FS::cust_bill_pkg;
use FS::cust_pay;
use FS::cust_credit;
use FS::part_referral;
use FS::cust_main_county;
use FS::agent;
use FS::cust_main_invoice;
use FS::cust_credit_bill;
use FS::cust_bill_pay;
use FS::prepay_credit;
use FS::queue;
use FS::part_pkg;
use FS::part_bill_event;
use FS::cust_bill_event;
use FS::cust_tax_exempt;
use FS::type_pkgs;
use FS::Msgcat qw(gettext);

@ISA = qw( FS::Record );

$Debug = 0;
#$Debug = 1;

$import = 0;

#ask FS::UID to run this stuff for us later
#$FS::UID::callback{'FS::cust_main'} = sub { 
install_callback FS::UID sub { 
  $conf = new FS::Conf;
  #yes, need it for stuff below (prolly should be cached)
};

sub _cache {
  my $self = shift;
  my ( $hashref, $cache ) = @_;
  if ( exists $hashref->{'pkgnum'} ) {
#    #@{ $self->{'_pkgnum'} } = ();
    my $subcache = $cache->subcache( 'pkgnum', 'cust_pkg', $hashref->{custnum});
    $self->{'_pkgnum'} = $subcache;
    #push @{ $self->{'_pkgnum'} },
    FS::cust_pkg->new_or_cached($hashref, $subcache) if $hashref->{pkgnum};
  }
}

=head1 NAME

FS::cust_main - Object methods for cust_main records

=head1 SYNOPSIS

  use FS::cust_main;

  $record = new FS::cust_main \%hash;
  $record = new FS::cust_main { 'column' => 'value' };

  $error = $record->insert;

  $error = $new_record->replace($old_record);

  $error = $record->delete;

  $error = $record->check;

  @cust_pkg = $record->all_pkgs;

  @cust_pkg = $record->ncancelled_pkgs;

  @cust_pkg = $record->suspended_pkgs;

  $error = $record->bill;
  $error = $record->bill %options;
  $error = $record->bill 'time' => $time;

  $error = $record->collect;
  $error = $record->collect %options;
  $error = $record->collect 'invoice_time'   => $time,
                            'batch_card'     => 'yes',
                            'report_badcard' => 'yes',
                          ;

=head1 DESCRIPTION

An FS::cust_main object represents a customer.  FS::cust_main inherits from 
FS::Record.  The following fields are currently supported:

=over 4

=item custnum - primary key (assigned automatically for new customers)

=item agentnum - agent (see L<FS::agent>)

=item refnum - Advertising source (see L<FS::part_referral>)

=item first - name

=item last - name

=item ss - social security number (optional)

=item company - (optional)

=item address1

=item address2 - (optional)

=item city

=item county - (optional, see L<FS::cust_main_county>)

=item state - (see L<FS::cust_main_county>)

=item zip

=item country - (see L<FS::cust_main_county>)

=item daytime - phone (optional)

=item night - phone (optional)

=item fax - phone (optional)

=item ship_first - name

=item ship_last - name

=item ship_company - (optional)

=item ship_address1

=item ship_address2 - (optional)

=item ship_city

=item ship_county - (optional, see L<FS::cust_main_county>)

=item ship_state - (see L<FS::cust_main_county>)

=item ship_zip

=item ship_country - (see L<FS::cust_main_county>)

=item ship_daytime - phone (optional)

=item ship_night - phone (optional)

=item ship_fax - phone (optional)

=item payby - `CARD' (credit cards), `CHEK' (electronic check), `LECB' (Phone bill billing), `BILL' (billing), `COMP' (free), or `PREPAY' (special billing type: applies a credit - see L<FS::prepay_credit> and sets billing type to BILL)

=item payinfo - card number, P.O., comp issuer (4-8 lowercase alphanumerics; think username) or prepayment identifier (see L<FS::prepay_credit>)

=item paydate - expiration date, mm/yyyy, m/yyyy, mm/yy or m/yy

=item payname - name on card or billing name

=item tax - tax exempt, empty or `Y'

=item otaker - order taker (assigned automatically, see L<FS::UID>)

=item comments - comments (optional)

=item referral_custnum - referring customer number

=back

=head1 METHODS

=over 4

=item new HASHREF

Creates a new customer.  To add the customer to the database, see L<"insert">.

Note that this stores the hash reference, not a distinct copy of the hash it
points to.  You can ask the object for a copy with the I<hash> method.

=cut

sub table { 'cust_main'; }

=item insert [ CUST_PKG_HASHREF [ , INVOICING_LIST_ARYREF ] ]

Adds this customer to the database.  If there is an error, returns the error,
otherwise returns false.

CUST_PKG_HASHREF: If you pass a Tie::RefHash data structure to the insert
method containing FS::cust_pkg and FS::svc_I<tablename> objects, all records
are inserted atomicly, or the transaction is rolled back.  Passing an empty
hash reference is equivalent to not supplying this parameter.  There should be
a better explanation of this, but until then, here's an example:

  use Tie::RefHash;
  tie %hash, 'Tie::RefHash'; #this part is important
  %hash = (
    $cust_pkg => [ $svc_acct ],
    ...
  );
  $cust_main->insert( \%hash );

INVOICING_LIST_ARYREF: If you pass an arrarref to the insert method, it will
be set as the invoicing list (see L<"invoicing_list">).  Errors return as
expected and rollback the entire transaction; it is not necessary to call 
check_invoicing_list first.  The invoicing_list is set after the records in the
CUST_PKG_HASHREF above are inserted, so it is now possible to set an
invoicing_list destination to the newly-created svc_acct.  Here's an example:

  $cust_main->insert( {}, [ $email, 'POST' ] );

=cut

sub insert {
  my $self = shift;
  my $cust_pkgs = @_ ? shift : {};
  my $invoicing_list = @_ ? shift : '';

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  my $amount = 0;
  my $seconds = 0;
  if ( $self->payby eq 'PREPAY' ) {
    $self->payby('BILL');
    my $prepay_credit = qsearchs(
      'prepay_credit',
      { 'identifier' => $self->payinfo },
      '',
      'FOR UPDATE'
    );
    warn "WARNING: can't find pre-found prepay_credit: ". $self->payinfo
      unless $prepay_credit;
    $amount = $prepay_credit->amount;
    $seconds = $prepay_credit->seconds;
    my $error = $prepay_credit->delete;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "removing prepay_credit (transaction rolled back): $error";
    }
  }

  my $error = $self->SUPER::insert;
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    #return "inserting cust_main record (transaction rolled back): $error";
    return $error;
  }

  # invoicing list
  if ( $invoicing_list ) {
    $error = $self->check_invoicing_list( $invoicing_list );
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "checking invoicing_list (transaction rolled back): $error";
    }
    $self->invoicing_list( $invoicing_list );
  }

  # packages
  $error = $self->order_pkgs($cust_pkgs, \$seconds);
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return $error;
  }

  if ( $seconds ) {
    $dbh->rollback if $oldAutoCommit;
    return "No svc_acct record to apply pre-paid time";
  }

  if ( $amount ) {
    my $cust_credit = new FS::cust_credit {
      'custnum' => $self->custnum,
      'amount'  => $amount,
    };
    $error = $cust_credit->insert;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "inserting credit (transaction rolled back): $error";
    }
  }

  #false laziness with sub replace
  my $queue = new FS::queue { 'job' => 'FS::cust_main::append_fuzzyfiles' };
  $error = $queue->insert($self->getfield('last'), $self->company);
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return "queueing job (transaction rolled back): $error";
  }

  if ( defined $self->dbdef_table->column('ship_last') && $self->ship_last ) {
    $queue = new FS::queue { 'job' => 'FS::cust_main::append_fuzzyfiles' };
    $error = $queue->insert($self->getfield('last'), $self->company);
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "queueing job (transaction rolled back): $error";
    }
  }
  #eslaf

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;
  '';

}

=item order_pkgs

document me.  like ->insert(%cust_pkg) on an existing record

=cut

sub order_pkgs {
  my $self = shift;
  my $cust_pkgs = shift;
  my $seconds = shift;

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  foreach my $cust_pkg ( keys %$cust_pkgs ) {
    $cust_pkg->custnum( $self->custnum );
    my $error = $cust_pkg->insert;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "inserting cust_pkg (transaction rolled back): $error";
    }
    foreach my $svc_something ( @{$cust_pkgs->{$cust_pkg}} ) {
      $svc_something->pkgnum( $cust_pkg->pkgnum );
      if ( $seconds && $$seconds && $svc_something->isa('FS::svc_acct') ) {
        $svc_something->seconds( $svc_something->seconds + $$seconds );
        $$seconds = 0;
      }
      $error = $svc_something->insert;
      if ( $error ) {
        $dbh->rollback if $oldAutoCommit;
        #return "inserting svc_ (transaction rolled back): $error";
        return $error;
      }
    }
  }

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;
  ''; #no error
}

=item delete NEW_CUSTNUM

This deletes the customer.  If there is an error, returns the error, otherwise
returns false.

This will completely remove all traces of the customer record.  This is not
what you want when a customer cancels service; for that, cancel all of the
customer's packages (see L<FS::cust_pkg/cancel>).

If the customer has any uncancelled packages, you need to pass a new (valid)
customer number for those packages to be transferred to.  Cancelled packages
will be deleted.  Did I mention that this is NOT what you want when a customer
cancels service and that you really should be looking see L<FS::cust_pkg/cancel>?

You can't delete a customer with invoices (see L<FS::cust_bill>),
or credits (see L<FS::cust_credit>), payments (see L<FS::cust_pay>) or
refunds (see L<FS::cust_refund>).

=cut

sub delete {
  my $self = shift;

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  if ( qsearch( 'cust_bill', { 'custnum' => $self->custnum } ) ) {
    $dbh->rollback if $oldAutoCommit;
    return "Can't delete a customer with invoices";
  }
  if ( qsearch( 'cust_credit', { 'custnum' => $self->custnum } ) ) {
    $dbh->rollback if $oldAutoCommit;
    return "Can't delete a customer with credits";
  }
  if ( qsearch( 'cust_pay', { 'custnum' => $self->custnum } ) ) {
    $dbh->rollback if $oldAutoCommit;
    return "Can't delete a customer with payments";
  }
  if ( qsearch( 'cust_refund', { 'custnum' => $self->custnum } ) ) {
    $dbh->rollback if $oldAutoCommit;
    return "Can't delete a customer with refunds";
  }

  my @cust_pkg = $self->ncancelled_pkgs;
  if ( @cust_pkg ) {
    my $new_custnum = shift;
    unless ( qsearchs( 'cust_main', { 'custnum' => $new_custnum } ) ) {
      $dbh->rollback if $oldAutoCommit;
      return "Invalid new customer number: $new_custnum";
    }
    foreach my $cust_pkg ( @cust_pkg ) {
      my %hash = $cust_pkg->hash;
      $hash{'custnum'} = $new_custnum;
      my $new_cust_pkg = new FS::cust_pkg ( \%hash );
      my $error = $new_cust_pkg->replace($cust_pkg);
      if ( $error ) {
        $dbh->rollback if $oldAutoCommit;
        return $error;
      }
    }
  }
  my @cancelled_cust_pkg = $self->all_pkgs;
  foreach my $cust_pkg ( @cancelled_cust_pkg ) {
    my $error = $cust_pkg->delete;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return $error;
    }
  }

  foreach my $cust_main_invoice ( #(email invoice destinations, not invoices)
    qsearch( 'cust_main_invoice', { 'custnum' => $self->custnum } )
  ) {
    my $error = $cust_main_invoice->delete;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return $error;
    }
  }

  my $error = $self->SUPER::delete;
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return $error;
  }

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;
  '';

}

=item replace OLD_RECORD [ INVOICING_LIST_ARYREF ]

Replaces the OLD_RECORD with this one in the database.  If there is an error,
returns the error, otherwise returns false.

INVOICING_LIST_ARYREF: If you pass an arrarref to the insert method, it will
be set as the invoicing list (see L<"invoicing_list">).  Errors return as
expected and rollback the entire transaction; it is not necessary to call 
check_invoicing_list first.  Here's an example:

  $new_cust_main->replace( $old_cust_main, [ $email, 'POST' ] );

=cut

sub replace {
  my $self = shift;
  my $old = shift;
  my @param = @_;

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  my $error = $self->SUPER::replace($old);

  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return $error;
  }

  if ( @param ) { # INVOICING_LIST_ARYREF
    my $invoicing_list = shift @param;
    $error = $self->check_invoicing_list( $invoicing_list );
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return $error;
    }
    $self->invoicing_list( $invoicing_list );
  }

  if ( $self->payby =~ /^(CARD|CHEK|LECB)$/ &&
       grep { $self->get($_) ne $old->get($_) } qw(payinfo paydate payname) ) {
    # card/check info has changed, want to retry realtime_card invoice events
    #false laziness w/collect
    foreach my $cust_bill_event (
      grep {
             #$_->part_bill_event->plan eq 'realtime-card'
             $_->part_bill_event->eventcode =~
                 /^\$cust_bill\->realtime_(card|ach|lec)\(\);$/
               && $_->status eq 'done'
               && $_->statustext
           }
        map { $_->cust_bill_event }
          grep { $_->cust_bill_event }
            $self->open_cust_bill

    ) {
      my $error = $cust_bill_event->retry;
      if ( $error ) {
        $dbh->rollback if $oldAutoCommit;
        return "error scheduling invoice events for retry: $error";
      }
    }
    #eslaf

  }

  #false laziness with sub insert
  my $queue = new FS::queue { 'job' => 'FS::cust_main::append_fuzzyfiles' };
  $error = $queue->insert($self->getfield('last'), $self->company);
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return "queueing job (transaction rolled back): $error";
  }

  if ( defined $self->dbdef_table->column('ship_last') && $self->ship_last ) {
    $queue = new FS::queue { 'job' => 'FS::cust_main::append_fuzzyfiles' };
    $error = $queue->insert($self->getfield('last'), $self->company);
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "queueing job (transaction rolled back): $error";
    }
  }
  #eslaf

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;
  '';

}

=item check

Checks all fields to make sure this is a valid customer record.  If there is
an error, returns the error, otherwise returns false.  Called by the insert
and repalce methods.

=cut

sub check {
  my $self = shift;

  #warn "BEFORE: \n". $self->_dump;

  my $error =
    $self->ut_numbern('custnum')
    || $self->ut_number('agentnum')
    || $self->ut_number('refnum')
    || $self->ut_name('last')
    || $self->ut_name('first')
    || $self->ut_textn('company')
    || $self->ut_text('address1')
    || $self->ut_textn('address2')
    || $self->ut_text('city')
    || $self->ut_textn('county')
    || $self->ut_textn('state')
    || $self->ut_country('country')
    || $self->ut_anything('comments')
    || $self->ut_numbern('referral_custnum')
  ;
  #barf.  need message catalogs.  i18n.  etc.
  $error .= "Please select a advertising source."
    if $error =~ /^Illegal or empty \(numeric\) refnum: /;
  return $error if $error;

  return "Unknown agent"
    unless qsearchs( 'agent', { 'agentnum' => $self->agentnum } );

  return "Unknown refnum"
    unless qsearchs( 'part_referral', { 'refnum' => $self->refnum } );

  return "Unknown referring custnum ". $self->referral_custnum
    unless ! $self->referral_custnum 
           || qsearchs( 'cust_main', { 'custnum' => $self->referral_custnum } );

  if ( $self->ss eq '' ) {
    $self->ss('');
  } else {
    my $ss = $self->ss;
    $ss =~ s/\D//g;
    $ss =~ /^(\d{3})(\d{2})(\d{4})$/
      or return "Illegal social security number: ". $self->ss;
    $self->ss("$1-$2-$3");
  }


# bad idea to disable, causes billing to fail because of no tax rates later
#  unless ( $import ) {
    unless ( qsearch('cust_main_county', {
      'country' => $self->country,
      'state'   => '',
     } ) ) {
      return "Unknown state/county/country: ".
        $self->state. "/". $self->county. "/". $self->country
        unless qsearch('cust_main_county',{
          'state'   => $self->state,
          'county'  => $self->county,
          'country' => $self->country,
        } );
    }
#  }

  $error =
    $self->ut_phonen('daytime', $self->country)
    || $self->ut_phonen('night', $self->country)
    || $self->ut_phonen('fax', $self->country)
    || $self->ut_zip('zip', $self->country)
  ;
  return $error if $error;

  my @addfields = qw(
    last first company address1 address2 city county state zip
    country daytime night fax
  );

  if ( defined $self->dbdef_table->column('ship_last') ) {
    if ( scalar ( grep { $self->getfield($_) ne $self->getfield("ship_$_") }
                       @addfields )
         && scalar ( grep { $self->getfield("ship_$_") ne '' } @addfields )
       )
    {
      my $error =
        $self->ut_name('ship_last')
        || $self->ut_name('ship_first')
        || $self->ut_textn('ship_company')
        || $self->ut_text('ship_address1')
        || $self->ut_textn('ship_address2')
        || $self->ut_text('ship_city')
        || $self->ut_textn('ship_county')
        || $self->ut_textn('ship_state')
        || $self->ut_country('ship_country')
      ;
      return $error if $error;

      #false laziness with above
      unless ( qsearchs('cust_main_county', {
        'country' => $self->ship_country,
        'state'   => '',
       } ) ) {
        return "Unknown ship_state/ship_county/ship_country: ".
          $self->ship_state. "/". $self->ship_county. "/". $self->ship_country
          unless qsearchs('cust_main_county',{
            'state'   => $self->ship_state,
            'county'  => $self->ship_county,
            'country' => $self->ship_country,
          } );
      }
      #eofalse

      $error =
        $self->ut_phonen('ship_daytime', $self->ship_country)
        || $self->ut_phonen('ship_night', $self->ship_country)
        || $self->ut_phonen('ship_fax', $self->ship_country)
        || $self->ut_zip('ship_zip', $self->ship_country)
      ;
      return $error if $error;

    } else { # ship_ info eq billing info, so don't store dup info in database
      $self->setfield("ship_$_", '')
        foreach qw( last first company address1 address2 city county state zip
                    country daytime night fax );
    }
  }

  $self->payby =~ /^(CARD|CHEK|LECB|BILL|COMP|PREPAY)$/
    or return "Illegal payby: ". $self->payby;
  $self->payby($1);

  if ( $self->payby eq 'CARD' ) {

    my $payinfo = $self->payinfo;
    $payinfo =~ s/\D//g;
    $payinfo =~ /^(\d{13,16})$/
      or return gettext('invalid_card'); # . ": ". $self->payinfo;
    $payinfo = $1;
    $self->payinfo($payinfo);
    validate($payinfo)
      or return gettext('invalid_card'); # . ": ". $self->payinfo;
    return gettext('unknown_card_type')
      if cardtype($self->payinfo) eq "Unknown";

  } elsif ( $self->payby eq 'CHEK' ) {

    my $payinfo = $self->payinfo;
    $payinfo =~ s/[^\d\@]//g;
    $payinfo =~ /^(\d+)\@(\d{9})$/ or return 'invalid echeck account@aba';
    $payinfo = "$1\@$2";
    $self->payinfo($payinfo);

  } elsif ( $self->payby eq 'LECB' ) {

    my $payinfo = $self->payinfo;
    $payinfo =~ s/\D//g;
    $payinfo =~ /^1?(\d{10})$/ or return 'invalid btn billing telephone number';
    $payinfo = $1;
    $self->payinfo($payinfo);

  } elsif ( $self->payby eq 'BILL' ) {

    $error = $self->ut_textn('payinfo');
    return "Illegal P.O. number: ". $self->payinfo if $error;

  } elsif ( $self->payby eq 'COMP' ) {

    $error = $self->ut_textn('payinfo');
    return "Illegal comp account issuer: ". $self->payinfo if $error;

  } elsif ( $self->payby eq 'PREPAY' ) {

    my $payinfo = $self->payinfo;
    $payinfo =~ s/\W//g; #anything else would just confuse things
    $self->payinfo($payinfo);
    $error = $self->ut_alpha('payinfo');
    return "Illegal prepayment identifier: ". $self->payinfo if $error;
    return "Unknown prepayment identifier"
      unless qsearchs('prepay_credit', { 'identifier' => $self->payinfo } );

  }

  if ( $self->paydate eq '' || $self->paydate eq '-' ) {
    return "Expriation date required"
      unless $self->payby =~ /^(BILL|PREPAY|CHEK|LECB)$/;
    $self->paydate('');
  } else {
    $self->paydate =~ /^(\d{1,2})[\/\-](\d{2}(\d{2})?)$/
      or return "Illegal expiration date: ". $self->paydate;
    my $y = length($2) == 4 ? $2 : "20$2";
    $self->paydate("$y-$1-01");
    my($nowm,$nowy)=(localtime(time))[4,5]; $nowm++; $nowy+=1900;
    return gettext('expired_card')
      if !$import && ( $y<$nowy || ( $y==$nowy && $1<$nowm ) );
  }

  if ( $self->payname eq '' && $self->payby ne 'CHEK' &&
       ( ! $conf->exists('require_cardname') || $self->payby ne 'CARD' ) ) {
    $self->payname( $self->first. " ". $self->getfield('last') );
  } else {
    $self->payname =~ /^([\w \,\.\-\']+)$/
      or return gettext('illegal_name'). " payname: ". $self->payname;
    $self->payname($1);
  }

  $self->tax =~ /^(Y?)$/ or return "Illegal tax: ". $self->tax;
  $self->tax($1);

  $self->otaker(getotaker);

  #warn "AFTER: \n". $self->_dump;

  ''; #no error
}

=item all_pkgs

Returns all packages (see L<FS::cust_pkg>) for this customer.

=cut

sub all_pkgs {
  my $self = shift;
  if ( $self->{'_pkgnum'} ) {
    values %{ $self->{'_pkgnum'}->cache };
  } else {
    qsearch( 'cust_pkg', { 'custnum' => $self->custnum });
  }
}

=item ncancelled_pkgs

Returns all non-cancelled packages (see L<FS::cust_pkg>) for this customer.

=cut

sub ncancelled_pkgs {
  my $self = shift;
  if ( $self->{'_pkgnum'} ) {
    grep { ! $_->getfield('cancel') } values %{ $self->{'_pkgnum'}->cache };
  } else {
    @{ [ # force list context
      qsearch( 'cust_pkg', {
        'custnum' => $self->custnum,
        'cancel'  => '',
      }),
      qsearch( 'cust_pkg', {
        'custnum' => $self->custnum,
        'cancel'  => 0,
      }),
    ] };
  }
}

=item suspended_pkgs

Returns all suspended packages (see L<FS::cust_pkg>) for this customer.

=cut

sub suspended_pkgs {
  my $self = shift;
  grep { $_->susp } $self->ncancelled_pkgs;
}

=item unflagged_suspended_pkgs

Returns all unflagged suspended packages (see L<FS::cust_pkg>) for this
customer (thouse packages without the `manual_flag' set).

=cut

sub unflagged_suspended_pkgs {
  my $self = shift;
  return $self->suspended_pkgs
    unless dbdef->table('cust_pkg')->column('manual_flag');
  grep { ! $_->manual_flag } $self->suspended_pkgs;
}

=item unsuspended_pkgs

Returns all unsuspended (and uncancelled) packages (see L<FS::cust_pkg>) for
this customer.

=cut

sub unsuspended_pkgs {
  my $self = shift;
  grep { ! $_->susp } $self->ncancelled_pkgs;
}

=item unsuspend

Unsuspends all unflagged suspended packages (see L</unflagged_suspended_pkgs>
and L<FS::cust_pkg>) for this customer.  Always returns a list: an empty list
on success or a list of errors.

=cut

sub unsuspend {
  my $self = shift;
  grep { $_->unsuspend } $self->suspended_pkgs;
}

=item suspend

Suspends all unsuspended packages (see L<FS::cust_pkg>) for this customer.
Always returns a list: an empty list on success or a list of errors.

=cut

sub suspend {
  my $self = shift;
  grep { $_->suspend } $self->unsuspended_pkgs;
}

=item cancel

Cancels all uncancelled packages (see L<FS::cust_pkg>) for this customer.
Always returns a list: an empty list on success or a list of errors.

=cut

sub cancel {
  my $self = shift;
  grep { $_->cancel } $self->ncancelled_pkgs;
}

=item agent

Returns the agent (see L<FS::agent>) for this customer.

=cut

sub agent {
  my $self = shift;
  qsearchs( 'agent', { 'agentnum' => $self->agentnum } );
}

=item bill OPTIONS

Generates invoices (see L<FS::cust_bill>) for this customer.  Usually used in
conjunction with the collect method.

Options are passed as name-value pairs.

The only currently available option is `time', which bills the customer as if
it were that time.  It is specified as a UNIX timestamp; see
L<perlfunc/"time">).  Also see L<Time::Local> and L<Date::Parse> for conversion
functions.  For example:

 use Date::Parse;
 ...
 $cust_main->bill( 'time' => str2time('April 20th, 2001') );

If there is an error, returns the error, otherwise returns false.

=cut

sub bill {
  my( $self, %options ) = @_;
  my $time = $options{'time'} || time;

  my $error;

  #put below somehow?
  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  # find the packages which are due for billing, find out how much they are
  # & generate invoice database.
 
  my( $total_setup, $total_recur ) = ( 0, 0 );
  #my( $taxable_setup, $taxable_recur ) = ( 0, 0 );
  my @cust_bill_pkg = ();
  #my $tax = 0;##
  #my $taxable_charged = 0;##
  #my $charged = 0;##

  my %tax;

  foreach my $cust_pkg (
    qsearch('cust_pkg', { 'custnum' => $self->custnum } )
  ) {

    #NO!! next if $cust_pkg->cancel;  
    next if $cust_pkg->getfield('cancel');  

    #? to avoid use of uninitialized value errors... ?
    $cust_pkg->setfield('bill', '')
      unless defined($cust_pkg->bill);
 
    my $part_pkg = $cust_pkg->part_pkg;

    #so we don't modify cust_pkg record unnecessarily
    my $cust_pkg_mod_flag = 0;
    my %hash = $cust_pkg->hash;
    my $old_cust_pkg = new FS::cust_pkg \%hash;

    my @details = ();

    # bill setup
    my $setup = 0;
    unless ( $cust_pkg->setup ) {
      my $setup_prog = $part_pkg->getfield('setup');
      $setup_prog =~ /^(.*)$/ or do {
        $dbh->rollback if $oldAutoCommit;
        return "Illegal setup for pkgpart ". $part_pkg->pkgpart.
               ": $setup_prog";
      };
      $setup_prog = $1;

        #my $cpt = new Safe;
        ##$cpt->permit(); #what is necessary?
        #$cpt->share(qw( $cust_pkg )); #can $cpt now use $cust_pkg methods?
        #$setup = $cpt->reval($setup_prog);
      $setup = eval $setup_prog;
      unless ( defined($setup) ) {
        $dbh->rollback if $oldAutoCommit;
        return "Error eval-ing part_pkg->setup pkgpart ". $part_pkg->pkgpart.
               "(expression $setup_prog): $@";
      }
      $cust_pkg->setfield('setup',$time);
      $cust_pkg_mod_flag=1; 
    }

    #bill recurring fee
    my $recur = 0;
    my $sdate;
    if ( $part_pkg->getfield('freq') > 0 &&
         ! $cust_pkg->getfield('susp') &&
         ( $cust_pkg->getfield('bill') || 0 ) <= $time
    ) {
      my $recur_prog = $part_pkg->getfield('recur');
      $recur_prog =~ /^(.*)$/ or do {
        $dbh->rollback if $oldAutoCommit;
        return "Illegal recur for pkgpart ". $part_pkg->pkgpart.
               ": $recur_prog";
      };
      $recur_prog = $1;

      # shared with $recur_prog
      $sdate = $cust_pkg->bill || $cust_pkg->setup || $time;

        #my $cpt = new Safe;
        ##$cpt->permit(); #what is necessary?
        #$cpt->share(qw( $cust_pkg )); #can $cpt now use $cust_pkg methods?
        #$recur = $cpt->reval($recur_prog);
      $recur = eval $recur_prog;
      unless ( defined($recur) ) {
        $dbh->rollback if $oldAutoCommit;
        return "Error eval-ing part_pkg->recur pkgpart ".  $part_pkg->pkgpart.
               "(expression $recur_prog): $@";
      }
      #change this bit to use Date::Manip? CAREFUL with timezones (see
      # mailing list archive)
      my ($sec,$min,$hour,$mday,$mon,$year) =
        (localtime($sdate) )[0,1,2,3,4,5];

      #pro-rating magic - if $recur_prog fiddles $sdate, want to use that
      # only for figuring next bill date, nothing else, so, reset $sdate again
      # here
      $sdate = $cust_pkg->bill || $cust_pkg->setup || $time;
      $cust_pkg->last_bill($sdate)
        if $cust_pkg->dbdef_table->column('last_bill');

      $mon += $part_pkg->freq;
      until ( $mon < 12 ) { $mon -= 12; $year++; }
      $cust_pkg->setfield('bill',
        timelocal($sec,$min,$hour,$mday,$mon,$year));
      $cust_pkg_mod_flag = 1; 
    }

    warn "\$setup is undefined" unless defined($setup);
    warn "\$recur is undefined" unless defined($recur);
    warn "\$cust_pkg->bill is undefined" unless defined($cust_pkg->bill);

    my $taxable_charged = 0;
    if ( $cust_pkg_mod_flag ) {
      $error=$cust_pkg->replace($old_cust_pkg);
      if ( $error ) { #just in case
        $dbh->rollback if $oldAutoCommit;
        return "Error modifying pkgnum ". $cust_pkg->pkgnum. ": $error";
      }
      $setup = sprintf( "%.2f", $setup );
      $recur = sprintf( "%.2f", $recur );
      if ( $setup < 0 ) {
        $dbh->rollback if $oldAutoCommit;
        return "negative setup $setup for pkgnum ". $cust_pkg->pkgnum;
      }
      if ( $recur < 0 ) {
        $dbh->rollback if $oldAutoCommit;
        return "negative recur $recur for pkgnum ". $cust_pkg->pkgnum;
      }
      if ( $setup > 0 || $recur > 0 ) {
        my $cust_bill_pkg = new FS::cust_bill_pkg ({
          'pkgnum'  => $cust_pkg->pkgnum,
          'setup'   => $setup,
          'recur'   => $recur,
          'sdate'   => $sdate,
          'edate'   => $cust_pkg->bill,
          'details' => \@details,
        });
        push @cust_bill_pkg, $cust_bill_pkg;
        $total_setup += $setup;
        $total_recur += $recur;
        $taxable_charged += $setup
          unless $part_pkg->setuptax =~ /^Y$/i;
        $taxable_charged += $recur
          unless $part_pkg->recurtax =~ /^Y$/i;
          
        unless ( $self->tax =~ /Y/i
                 || $self->payby eq 'COMP'
                 || $taxable_charged == 0 ) {

          my $cust_main_county = qsearchs('cust_main_county',{
              'state'    => $self->state,
              'county'   => $self->county,
              'country'  => $self->country,
              'taxclass' => $part_pkg->taxclass,
          } );
          $cust_main_county ||= qsearchs('cust_main_county',{
              'state'    => $self->state,
              'county'   => $self->county,
              'country'  => $self->country,
              'taxclass' => '',
          } );
          unless ( $cust_main_county ) {
            $dbh->rollback if $oldAutoCommit;
            return
              "fatal: can't find tax rate for state/county/country/taxclass ".
              join('/', ( map $self->$_(), qw(state county country) ),
                        $part_pkg->taxclass ).  "\n";
          }

          if ( $cust_main_county->exempt_amount ) {
            my ($mon,$year) = (localtime($sdate) )[4,5];
            $mon++;
            my $freq = $part_pkg->freq || 1;
            my $taxable_per_month = sprintf("%.2f", $taxable_charged / $freq );
            foreach my $which_month ( 1 .. $freq ) {
              my %hash = (
                'custnum' => $self->custnum,
                'taxnum'  => $cust_main_county->taxnum,
                'year'    => 1900+$year,
                'month'   => $mon++,
              );
              #until ( $mon < 12 ) { $mon -= 12; $year++; }
              until ( $mon < 13 ) { $mon -= 12; $year++; }
              my $cust_tax_exempt =
                qsearchs('cust_tax_exempt', \%hash)
                || new FS::cust_tax_exempt( { %hash, 'amount' => 0 } );
              my $remaining_exemption = sprintf("%.2f",
                $cust_main_county->exempt_amount - $cust_tax_exempt->amount );
              if ( $remaining_exemption > 0 ) {
                my $addl = $remaining_exemption > $taxable_per_month
                  ? $taxable_per_month
                  : $remaining_exemption;
                $taxable_charged -= $addl;
                my $new_cust_tax_exempt = new FS::cust_tax_exempt ( {
                  $cust_tax_exempt->hash,
                  'amount' => sprintf("%.2f", $cust_tax_exempt->amount + $addl),
                } );
                $error = $new_cust_tax_exempt->exemptnum
                  ? $new_cust_tax_exempt->replace($cust_tax_exempt)
                  : $new_cust_tax_exempt->insert;
                if ( $error ) {
                  $dbh->rollback if $oldAutoCommit;
                  return "fatal: can't update cust_tax_exempt: $error";
                }

              } # if $remaining_exemption > 0

            } #foreach $which_month

          } #if $cust_main_county->exempt_amount

          $taxable_charged = sprintf( "%.2f", $taxable_charged);

          #$tax += $taxable_charged * $cust_main_county->tax / 100
          $tax{ $cust_main_county->taxname || 'Tax' } +=
            $taxable_charged * $cust_main_county->tax / 100

        } #unless $self->tax =~ /Y/i
          #       || $self->payby eq 'COMP'
          #       || $taxable_charged == 0

      } #if $setup > 0 || $recur > 0
      
    } #if $cust_pkg_mod_flag

  } #foreach my $cust_pkg

  my $charged = sprintf( "%.2f", $total_setup + $total_recur );
#  my $taxable_charged = sprintf( "%.2f", $taxable_setup + $taxable_recur );

  unless ( @cust_bill_pkg ) { #don't create invoices with no line items
    $dbh->commit or die $dbh->errstr if $oldAutoCommit;
    return '';
  } 

#  unless ( $self->tax =~ /Y/i
#           || $self->payby eq 'COMP'
#           || $taxable_charged == 0 ) {
#    my $cust_main_county = qsearchs('cust_main_county',{
#        'state'   => $self->state,
#        'county'  => $self->county,
#        'country' => $self->country,
#    } ) or die "fatal: can't find tax rate for state/county/country ".
#               $self->state. "/". $self->county. "/". $self->country. "\n";
#    my $tax = sprintf( "%.2f",
#      $taxable_charged * ( $cust_main_county->getfield('tax') / 100 )
#    );

  foreach my $taxname ( grep { $tax{$_} > 0 } keys %tax ) {
    my $tax = sprintf("%.2f", $tax{$taxname} );
    $charged = sprintf( "%.2f", $charged+$tax );

    my $cust_bill_pkg = new FS::cust_bill_pkg ({
      'pkgnum'   => 0,
      'setup'    => $tax,
      'recur'    => 0,
      'sdate'    => '',
      'edate'    => '',
      'itemdesc' => $taxname,
    });
    push @cust_bill_pkg, $cust_bill_pkg;
  }
#  }

  my $cust_bill = new FS::cust_bill ( {
    'custnum' => $self->custnum,
    '_date'   => $time,
    'charged' => $charged,
  } );
  $error = $cust_bill->insert;
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return "can't create invoice for customer #". $self->custnum. ": $error";
  }

  my $invnum = $cust_bill->invnum;
  my $cust_bill_pkg;
  foreach $cust_bill_pkg ( @cust_bill_pkg ) {
    #warn $invnum;
    $cust_bill_pkg->invnum($invnum);
    $error = $cust_bill_pkg->insert;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "can't create invoice line item for customer #". $self->custnum.
             ": $error";
    }
  }
  
  $dbh->commit or die $dbh->errstr if $oldAutoCommit;
  ''; #no error
}

=item collect OPTIONS

(Attempt to) collect money for this customer's outstanding invoices (see
L<FS::cust_bill>).  Usually used after the bill method.

Depending on the value of `payby', this may print an invoice (`BILL'), charge
a credit card (`CARD'), or just add any necessary (pseudo-)payment (`COMP').

Most actions are now triggered by invoice events; see L<FS::part_bill_event>
and the invoice events web interface.

If there is an error, returns the error, otherwise returns false.

Options are passed as name-value pairs.

Currently available options are:

invoice_time - Use this time when deciding when to print invoices and
late notices on those invoices.  The default is now.  It is specified as a UNIX timestamp; see L<perlfunc/"time">).  Also see L<Time::Local> and L<Date::Parse>
for conversion functions.

retry_card - Retry cards even when not scheduled by invoice events.

batch_card - This option is deprecated.  See the invoice events web interface
to control whether cards are batched or run against a realtime gateway.

report_badcard - This option is deprecated.

force_print - This option is deprecated; see the invoice events web interface.

=cut

sub collect {
  my( $self, %options ) = @_;
  my $invoice_time = $options{'invoice_time'} || time;

  #put below somehow?
  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  my $balance = $self->balance;
  warn "collect customer". $self->custnum. ": balance $balance" if $Debug;
  unless ( $balance > 0 ) { #redundant?????
    $dbh->rollback if $oldAutoCommit; #hmm
    return '';
  }

  if ( exists($options{'retry_card'}) && $options{'retry_card'} ) {
    #false laziness w/replace
    foreach my $cust_bill_event (
      grep {
             #$_->part_bill_event->plan eq 'realtime-card'
             $_->part_bill_event->eventcode eq '$cust_bill->realtime_card();'
               && $_->status eq 'done'
               && $_->statustext
           }
        map { $_->cust_bill_event }
          grep { $_->cust_bill_event }
            $self->open_cust_bill
    ) {
      my $error = $cust_bill_event->retry;
      if ( $error ) {
        $dbh->rollback if $oldAutoCommit;
        return "error scheduling invoice events for retry: $error";
      }
    }
    #eslaf
  }

  foreach my $cust_bill ( $self->cust_bill ) {

    #this has to be before next's
    my $amount = sprintf( "%.2f", $balance < $cust_bill->owed
                                  ? $balance
                                  : $cust_bill->owed
    );
    $balance = sprintf( "%.2f", $balance - $amount );

    next unless $cust_bill->owed > 0;

    # don't try to charge for the same invoice if it's already in a batch
    #next if qsearchs( 'cust_pay_batch', { 'invnum' => $cust_bill->invnum } );

    warn "invnum ". $cust_bill->invnum. " (owed ". $cust_bill->owed. ", amount $amount, balance $balance)" if $Debug;

    next unless $amount > 0;


    foreach my $part_bill_event (
      sort {    $a->seconds   <=> $b->seconds
             || $a->weight    <=> $b->weight
             || $a->eventpart <=> $b->eventpart }
        grep { $_->seconds <= ( $invoice_time - $cust_bill->_date )
               && ! qsearchs( 'cust_bill_event', {
                                'invnum'    => $cust_bill->invnum,
                                'eventpart' => $_->eventpart,
                                'status'    => 'done',
                                                                   } )
             }
          qsearch('part_bill_event', { 'payby'    => $self->payby,
                                       'disabled' => '',           } )
    ) {

      last unless $cust_bill->owed > 0; #don't run subsequent events if owed=0

      warn "calling invoice event (". $part_bill_event->eventcode. ")\n"
        if $Debug;
      my $cust_main = $self; #for callback
      my $error = eval $part_bill_event->eventcode;

      my $status = '';
      my $statustext = '';
      if ( $@ ) {
        $status = 'failed';
        $statustext = $@;
      } elsif ( $error ) {
        $status = 'done';
        $statustext = $error;
      } else {
        $status = 'done'
      }

      #add cust_bill_event
      my $cust_bill_event = new FS::cust_bill_event {
        'invnum'     => $cust_bill->invnum,
        'eventpart'  => $part_bill_event->eventpart,
        #'_date'      => $invoice_time,
        '_date'      => time,
        'status'     => $status,
        'statustext' => $statustext,
      };
      $error = $cust_bill_event->insert;
      if ( $error ) {
        #$dbh->rollback if $oldAutoCommit;
        #return "error: $error";

        # gah, even with transactions.
        $dbh->commit if $oldAutoCommit; #well.
        my $e = 'WARNING: Event run but database not updated - '.
                'error inserting cust_bill_event, invnum #'. $cust_bill->invnum.
                ', eventpart '. $part_bill_event->eventpart.
                ": $error";
        warn $e;
        return $e;
      }


    }

  }

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;
  '';

}

=item total_owed

Returns the total owed for this customer on all invoices
(see L<FS::cust_bill/owed>).

=cut

sub total_owed {
  my $self = shift;
  $self->total_owed_date(2145859200); #12/31/2037
}

=item total_owed_date TIME

Returns the total owed for this customer on all invoices with date earlier than
TIME.  TIME is specified as a UNIX timestamp; see L<perlfunc/"time">).  Also
see L<Time::Local> and L<Date::Parse> for conversion functions.

=cut

sub total_owed_date {
  my $self = shift;
  my $time = shift;
  my $total_bill = 0;
  foreach my $cust_bill (
    grep { $_->_date <= $time }
      qsearch('cust_bill', { 'custnum' => $self->custnum, } )
  ) {
    $total_bill += $cust_bill->owed;
  }
  sprintf( "%.2f", $total_bill );
}

=item apply_credits

Applies (see L<FS::cust_credit_bill>) unapplied credits (see L<FS::cust_credit>)
to outstanding invoice balances in chronological order and returns the value
of any remaining unapplied credits available for refund
(see L<FS::cust_refund>).

=cut

sub apply_credits {
  my $self = shift;

  return 0 unless $self->total_credited;

  my @credits = sort { $b->_date <=> $a->_date} (grep { $_->credited > 0 }
      qsearch('cust_credit', { 'custnum' => $self->custnum } ) );

  my @invoices = sort { $a->_date <=> $b->_date} (grep { $_->owed > 0 }
      qsearch('cust_bill', { 'custnum' => $self->custnum } ) );

  my $credit;

  foreach my $cust_bill ( @invoices ) {
    my $amount;

    if ( !defined($credit) || $credit->credited == 0) {
      $credit = pop @credits or last;
    }

    if ($cust_bill->owed >= $credit->credited) {
      $amount=$credit->credited;
    }else{
      $amount=$cust_bill->owed;
    }
    
    my $cust_credit_bill = new FS::cust_credit_bill ( {
      'crednum' => $credit->crednum,
      'invnum'  => $cust_bill->invnum,
      'amount'  => $amount,
    } );
    my $error = $cust_credit_bill->insert;
    die $error if $error;
    
    redo if ($cust_bill->owed > 0);

  }

  return $self->total_credited;
}

=item apply_payments

Applies (see L<FS::cust_bill_pay>) unapplied payments (see L<FS::cust_pay>)
to outstanding invoice balances in chronological order.

 #and returns the value of any remaining unapplied payments.

=cut

sub apply_payments {
  my $self = shift;

  #return 0 unless

  my @payments = sort { $b->_date <=> $a->_date } ( grep { $_->unapplied > 0 }
      qsearch('cust_pay', { 'custnum' => $self->custnum } ) );

  my @invoices = sort { $a->_date <=> $b->_date} (grep { $_->owed > 0 }
      qsearch('cust_bill', { 'custnum' => $self->custnum } ) );

  my $payment;

  foreach my $cust_bill ( @invoices ) {
    my $amount;

    if ( !defined($payment) || $payment->unapplied == 0 ) {
      $payment = pop @payments or last;
    }

    if ( $cust_bill->owed >= $payment->unapplied ) {
      $amount = $payment->unapplied;
    } else {
      $amount = $cust_bill->owed;
    }

    my $cust_bill_pay = new FS::cust_bill_pay ( {
      'paynum' => $payment->paynum,
      'invnum' => $cust_bill->invnum,
      'amount' => $amount,
    } );
    my $error = $cust_bill_pay->insert;
    die $error if $error;

    redo if ( $cust_bill->owed > 0);

  }

  return $self->total_unapplied_payments;
}

=item total_credited

Returns the total outstanding credit (see L<FS::cust_credit>) for this
customer.  See L<FS::cust_credit/credited>.

=cut

sub total_credited {
  my $self = shift;
  my $total_credit = 0;
  foreach my $cust_credit ( qsearch('cust_credit', {
    'custnum' => $self->custnum,
  } ) ) {
    $total_credit += $cust_credit->credited;
  }
  sprintf( "%.2f", $total_credit );
}

=item total_unapplied_payments

Returns the total unapplied payments (see L<FS::cust_pay>) for this customer.
See L<FS::cust_pay/unapplied>.

=cut

sub total_unapplied_payments {
  my $self = shift;
  my $total_unapplied = 0;
  foreach my $cust_pay ( qsearch('cust_pay', {
    'custnum' => $self->custnum,
  } ) ) {
    $total_unapplied += $cust_pay->unapplied;
  }
  sprintf( "%.2f", $total_unapplied );
}

=item balance

Returns the balance for this customer (total_owed minus total_credited
minus total_unapplied_payments).

=cut

sub balance {
  my $self = shift;
  sprintf( "%.2f",
    $self->total_owed - $self->total_credited - $self->total_unapplied_payments
  );
}

=item balance_date TIME

Returns the balance for this customer, only considering invoices with date
earlier than TIME (total_owed_date minus total_credited minus
total_unapplied_payments).  TIME is specified as a UNIX timestamp; see
L<perlfunc/"time">).  Also see L<Time::Local> and L<Date::Parse> for conversion
functions.

=cut

sub balance_date {
  my $self = shift;
  my $time = shift;
  sprintf( "%.2f",
    $self->total_owed_date($time)
      - $self->total_credited
      - $self->total_unapplied_payments
  );
}

=item invoicing_list [ ARRAYREF ]

If an arguement is given, sets these email addresses as invoice recipients
(see L<FS::cust_main_invoice>).  Errors are not fatal and are not reported
(except as warnings), so use check_invoicing_list first.

Returns a list of email addresses (with svcnum entries expanded).

Note: You can clear the invoicing list by passing an empty ARRAYREF.  You can
check it without disturbing anything by passing nothing.

This interface may change in the future.

=cut

sub invoicing_list {
  my( $self, $arrayref ) = @_;
  if ( $arrayref ) {
    my @cust_main_invoice;
    if ( $self->custnum ) {
      @cust_main_invoice = 
        qsearch( 'cust_main_invoice', { 'custnum' => $self->custnum } );
    } else {
      @cust_main_invoice = ();
    }
    foreach my $cust_main_invoice ( @cust_main_invoice ) {
      #warn $cust_main_invoice->destnum;
      unless ( grep { $cust_main_invoice->address eq $_ } @{$arrayref} ) {
        #warn $cust_main_invoice->destnum;
        my $error = $cust_main_invoice->delete;
        warn $error if $error;
      }
    }
    if ( $self->custnum ) {
      @cust_main_invoice = 
        qsearch( 'cust_main_invoice', { 'custnum' => $self->custnum } );
    } else {
      @cust_main_invoice = ();
    }
    my %seen = map { $_->address => 1 } @cust_main_invoice;
    foreach my $address ( @{$arrayref} ) {
      next if exists $seen{$address} && $seen{$address};
      $seen{$address} = 1;
      my $cust_main_invoice = new FS::cust_main_invoice ( {
        'custnum' => $self->custnum,
        'dest'    => $address,
      } );
      my $error = $cust_main_invoice->insert;
      warn $error if $error;
    }
  }
  if ( $self->custnum ) {
    map { $_->address }
      qsearch( 'cust_main_invoice', { 'custnum' => $self->custnum } );
  } else {
    ();
  }
}

=item check_invoicing_list ARRAYREF

Checks these arguements as valid input for the invoicing_list method.  If there
is an error, returns the error, otherwise returns false.

=cut

sub check_invoicing_list {
  my( $self, $arrayref ) = @_;
  foreach my $address ( @{$arrayref} ) {
    my $cust_main_invoice = new FS::cust_main_invoice ( {
      'custnum' => $self->custnum,
      'dest'    => $address,
    } );
    my $error = $self->custnum
                ? $cust_main_invoice->check
                : $cust_main_invoice->checkdest
    ;
    return $error if $error;
  }
  '';
}

=item set_default_invoicing_list

Sets the invoicing list to all accounts associated with this customer,
overwriting any previous invoicing list.

=cut

sub set_default_invoicing_list {
  my $self = shift;
  $self->invoicing_list($self->all_emails);
}

=item all_emails

Returns the email addresses of all accounts provisioned for this customer.

=cut

sub all_emails {
  my $self = shift;
  my %list;
  foreach my $cust_pkg ( $self->all_pkgs ) {
    my @cust_svc = qsearch('cust_svc', { 'pkgnum' => $cust_pkg->pkgnum } );
    my @svc_acct =
      map { qsearchs('svc_acct', { 'svcnum' => $_->svcnum } ) }
        grep { qsearchs('svc_acct', { 'svcnum' => $_->svcnum } ) }
          @cust_svc;
    $list{$_}=1 foreach map { $_->email } @svc_acct;
  }
  keys %list;
}

=item invoicing_list_addpost

Adds postal invoicing to this customer.  If this customer is already configured
to receive postal invoices, does nothing.

=cut

sub invoicing_list_addpost {
  my $self = shift;
  return if grep { $_ eq 'POST' } $self->invoicing_list;
  my @invoicing_list = $self->invoicing_list;
  push @invoicing_list, 'POST';
  $self->invoicing_list(\@invoicing_list);
}

=item referral_cust_main [ DEPTH [ EXCLUDE_HASHREF ] ]

Returns an array of customers referred by this customer (referral_custnum set
to this custnum).  If DEPTH is given, recurses up to the given depth, returning
customers referred by customers referred by this customer and so on, inclusive.
The default behavior is DEPTH 1 (no recursion).

=cut

sub referral_cust_main {
  my $self = shift;
  my $depth = @_ ? shift : 1;
  my $exclude = @_ ? shift : {};

  my @cust_main =
    map { $exclude->{$_->custnum}++; $_; }
      grep { ! $exclude->{ $_->custnum } }
        qsearch( 'cust_main', { 'referral_custnum' => $self->custnum } );

  if ( $depth > 1 ) {
    push @cust_main,
      map { $_->referral_cust_main($depth-1, $exclude) }
        @cust_main;
  }

  @cust_main;
}

=item referral_cust_main_ncancelled

Same as referral_cust_main, except only returns customers with uncancelled
packages.

=cut

sub referral_cust_main_ncancelled {
  my $self = shift;
  grep { scalar($_->ncancelled_pkgs) } $self->referral_cust_main;
}

=item referral_cust_pkg [ DEPTH ]

Like referral_cust_main, except returns a flat list of all unsuspended (and
uncancelled) packages for each customer.  The number of items in this list may
be useful for comission calculations (perhaps after a C<grep { my $pkgpart = $_->pkgpart; grep { $_ == $pkgpart } @commission_worthy_pkgparts> } $cust_main-> ).

=cut

sub referral_cust_pkg {
  my $self = shift;
  my $depth = @_ ? shift : 1;

  map { $_->unsuspended_pkgs }
    grep { $_->unsuspended_pkgs }
      $self->referral_cust_main($depth);
}

=item credit AMOUNT, REASON

Applies a credit to this customer.  If there is an error, returns the error,
otherwise returns false.

=cut

sub credit {
  my( $self, $amount, $reason ) = @_;
  my $cust_credit = new FS::cust_credit {
    'custnum' => $self->custnum,
    'amount'  => $amount,
    'reason'  => $reason,
  };
  $cust_credit->insert;
}

=item charge AMOUNT [ PKG [ COMMENT [ TAXCLASS ] ] ]

Creates a one-time charge for this customer.  If there is an error, returns
the error, otherwise returns false.

=cut

sub charge {
  my ( $self, $amount ) = ( shift, shift );
  my $pkg      = @_ ? shift : 'One-time charge';
  my $comment  = @_ ? shift : '$'. sprintf("%.2f",$amount);
  my $taxclass = @_ ? shift : '';

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;

  my $part_pkg = new FS::part_pkg ( {
    'pkg'      => $pkg,
    'comment'  => $comment,
    'setup'    => $amount,
    'freq'     => 0,
    'recur'    => '0',
    'disabled' => 'Y',
    'taxclass' => $taxclass,
  } );

  my $error = $part_pkg->insert;
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return $error;
  }

  my $pkgpart = $part_pkg->pkgpart;
  my %type_pkgs = ( 'typenum' => $self->agent->typenum, 'pkgpart' => $pkgpart );
  unless ( qsearchs('type_pkgs', \%type_pkgs ) ) {
    my $type_pkgs = new FS::type_pkgs \%type_pkgs;
    $error = $type_pkgs->insert;
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return $error;
    }
  }

  my $cust_pkg = new FS::cust_pkg ( {
    'custnum' => $self->custnum,
    'pkgpart' => $pkgpart,
  } );

  $error = $cust_pkg->insert;
  if ( $error ) {
    $dbh->rollback if $oldAutoCommit;
    return $error;
  }

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;
  '';

}

=item cust_bill

Returns all the invoices (see L<FS::cust_bill>) for this customer.

=cut

sub cust_bill {
  my $self = shift;
  sort { $a->_date <=> $b->_date }
    qsearch('cust_bill', { 'custnum' => $self->custnum, } )
}

=item open_cust_bill

Returns all the open (owed > 0) invoices (see L<FS::cust_bill>) for this
customer.

=cut

sub open_cust_bill {
  my $self = shift;
  grep { $_->owed > 0 } $self->cust_bill;
}

=back

=head1 SUBROUTINES

=over 4

=item check_and_rebuild_fuzzyfiles

=cut

sub check_and_rebuild_fuzzyfiles {
  my $dir = $FS::UID::conf_dir. "cache.". $FS::UID::datasrc;
  -e "$dir/cust_main.last" && -e "$dir/cust_main.company"
    or &rebuild_fuzzyfiles;
}

=item rebuild_fuzzyfiles

=cut

sub rebuild_fuzzyfiles {

  use Fcntl qw(:flock);

  my $dir = $FS::UID::conf_dir. "cache.". $FS::UID::datasrc;

  #last

  open(LASTLOCK,">>$dir/cust_main.last")
    or die "can't open $dir/cust_main.last: $!";
  flock(LASTLOCK,LOCK_EX)
    or die "can't lock $dir/cust_main.last: $!";

  my @all_last = map $_->getfield('last'), qsearch('cust_main', {});
  push @all_last,
                 grep $_, map $_->getfield('ship_last'), qsearch('cust_main',{})
    if defined dbdef->table('cust_main')->column('ship_last');

  open (LASTCACHE,">$dir/cust_main.last.tmp")
    or die "can't open $dir/cust_main.last.tmp: $!";
  print LASTCACHE join("\n", @all_last), "\n";
  close LASTCACHE or die "can't close $dir/cust_main.last.tmp: $!";

  rename "$dir/cust_main.last.tmp", "$dir/cust_main.last";
  close LASTLOCK;

  #company

  open(COMPANYLOCK,">>$dir/cust_main.company")
    or die "can't open $dir/cust_main.company: $!";
  flock(COMPANYLOCK,LOCK_EX)
    or die "can't lock $dir/cust_main.company: $!";

  my @all_company = grep $_ ne '', map $_->company, qsearch('cust_main',{});
  push @all_company,
       grep $_ ne '', map $_->ship_company, qsearch('cust_main', {})
    if defined dbdef->table('cust_main')->column('ship_last');

  open (COMPANYCACHE,">$dir/cust_main.company.tmp")
    or die "can't open $dir/cust_main.company.tmp: $!";
  print COMPANYCACHE join("\n", @all_company), "\n";
  close COMPANYCACHE or die "can't close $dir/cust_main.company.tmp: $!";

  rename "$dir/cust_main.company.tmp", "$dir/cust_main.company";
  close COMPANYLOCK;

}

=item all_last

=cut

sub all_last {
  my $dir = $FS::UID::conf_dir. "cache.". $FS::UID::datasrc;
  open(LASTCACHE,"<$dir/cust_main.last")
    or die "can't open $dir/cust_main.last: $!";
  my @array = map { chomp; $_; } <LASTCACHE>;
  close LASTCACHE;
  \@array;
}

=item all_company

=cut

sub all_company {
  my $dir = $FS::UID::conf_dir. "cache.". $FS::UID::datasrc;
  open(COMPANYCACHE,"<$dir/cust_main.company")
    or die "can't open $dir/cust_main.last: $!";
  my @array = map { chomp; $_; } <COMPANYCACHE>;
  close COMPANYCACHE;
  \@array;
}

=item append_fuzzyfiles LASTNAME COMPANY

=cut

sub append_fuzzyfiles {
  my( $last, $company ) = @_;

  &check_and_rebuild_fuzzyfiles;

  use Fcntl qw(:flock);

  my $dir = $FS::UID::conf_dir. "cache.". $FS::UID::datasrc;

  if ( $last ) {

    open(LAST,">>$dir/cust_main.last")
      or die "can't open $dir/cust_main.last: $!";
    flock(LAST,LOCK_EX)
      or die "can't lock $dir/cust_main.last: $!";

    print LAST "$last\n";

    flock(LAST,LOCK_UN)
      or die "can't unlock $dir/cust_main.last: $!";
    close LAST;
  }

  if ( $company ) {

    open(COMPANY,">>$dir/cust_main.company")
      or die "can't open $dir/cust_main.company: $!";
    flock(COMPANY,LOCK_EX)
      or die "can't lock $dir/cust_main.company: $!";

    print COMPANY "$company\n";

    flock(COMPANY,LOCK_UN)
      or die "can't unlock $dir/cust_main.company: $!";

    close COMPANY;
  }

  1;
}

=item batch_import

=cut

sub batch_import {
  my $param = shift;
  #warn join('-',keys %$param);
  my $fh = $param->{filehandle};
  my $agentnum = $param->{agentnum};
  my $refnum = $param->{refnum};
  my $pkgpart = $param->{pkgpart};
  my @fields = @{$param->{fields}};

  eval "use Date::Parse;";
  die $@ if $@;
  eval "use Text::CSV_XS;";
  die $@ if $@;

  my $csv = new Text::CSV_XS;
  #warn $csv;
  #warn $fh;

  my $imported = 0;
  #my $columns;

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;
  
  #while ( $columns = $csv->getline($fh) ) {
  my $line;
  while ( defined($line=<$fh>) ) {

    $csv->parse($line) or do {
      $dbh->rollback if $oldAutoCommit;
      return "can't parse: ". $csv->error_input();
    };

    my @columns = $csv->fields();
    #warn join('-',@columns);

    my %cust_main = (
      agentnum => $agentnum,
      refnum   => $refnum,
      country  => 'US', #default
      payby    => 'BILL', #default
      paydate  => '12/2037', #default
    );
    my $billtime = time;
    my %cust_pkg = ( pkgpart => $pkgpart );
    foreach my $field ( @fields ) {
      if ( $field =~ /^cust_pkg\.(setup|bill|susp|expire|cancel)$/ ) {
        #$cust_pkg{$1} = str2time( shift @$columns );
        if ( $1 eq 'setup' ) {
          $billtime = str2time(shift @columns);
        } else {
          $cust_pkg{$1} = str2time( shift @columns );
        }
      } else {
        #$cust_main{$field} = shift @$columns; 
        $cust_main{$field} = shift @columns; 
      }
    }

    my $cust_pkg = new FS::cust_pkg ( \%cust_pkg ) if $pkgpart;
    my $cust_main = new FS::cust_main ( \%cust_main );
    use Tie::RefHash;
    tie my %hash, 'Tie::RefHash'; #this part is important
    $hash{$cust_pkg} = [] if $pkgpart;
    my $error = $cust_main->insert( \%hash );

    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "can't insert customer for $line: $error";
    }

    #false laziness w/bill.cgi
    $error = $cust_main->bill( 'time' => $billtime );
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "can't bill customer for $line: $error";
    }

    $cust_main->apply_payments;
    $cust_main->apply_credits;

    $error = $cust_main->collect();
    if ( $error ) {
      $dbh->rollback if $oldAutoCommit;
      return "can't collect customer for $line: $error";
    }

    $imported++;
  }

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;

  return "Empty file!" unless $imported;

  ''; #no error

}

=item batch_charge

=cut

sub batch_charge {
  my $param = shift;
  #warn join('-',keys %$param);
  my $fh = $param->{filehandle};
  my @fields = @{$param->{fields}};

  eval "use Date::Parse;";
  die $@ if $@;
  eval "use Text::CSV_XS;";
  die $@ if $@;

  my $csv = new Text::CSV_XS;
  #warn $csv;
  #warn $fh;

  my $imported = 0;
  #my $columns;

  local $SIG{HUP} = 'IGNORE';
  local $SIG{INT} = 'IGNORE';
  local $SIG{QUIT} = 'IGNORE';
  local $SIG{TERM} = 'IGNORE';
  local $SIG{TSTP} = 'IGNORE';
  local $SIG{PIPE} = 'IGNORE';

  my $oldAutoCommit = $FS::UID::AutoCommit;
  local $FS::UID::AutoCommit = 0;
  my $dbh = dbh;
  
  #while ( $columns = $csv->getline($fh) ) {
  my $line;
  while ( defined($line=<$fh>) ) {

    $csv->parse($line) or do {
      $dbh->rollback if $oldAutoCommit;
      return "can't parse: ". $csv->error_input();
    };

    my @columns = $csv->fields();
    #warn join('-',@columns);

    my %row = ();
    foreach my $field ( @fields ) {
      $row{$field} = shift @columns;
    }

    my $cust_main = qsearchs('cust_main', { 'custnum' => $row{'custnum'} } );
    unless ( $cust_main ) {
      $dbh->rollback if $oldAutoCommit;
      return "unknown custnum $row{'custnum'}";
    }

    if ( $row{'amount'} > 0 ) {
      my $error = $cust_main->charge($row{'amount'}, $row{'pkg'});
      if ( $error ) {
        $dbh->rollback if $oldAutoCommit;
        return $error;
      }
      $imported++;
    } elsif ( $row{'amount'} < 0 ) {
      my $error = $cust_main->credit( sprintf( "%.2f", 0-$row{'amount'} ),
                                      $row{'pkg'}                         );
      if ( $error ) {
        $dbh->rollback if $oldAutoCommit;
        return $error;
      }
      $imported++;
    } else {
      #hmm?
    }

  }

  $dbh->commit or die $dbh->errstr if $oldAutoCommit;

  return "Empty file!" unless $imported;

  ''; #no error

}

=back

=head1 BUGS

The delete method.

The delete method should possibly take an FS::cust_main object reference
instead of a scalar customer number.

Bill and collect options should probably be passed as references instead of a
list.

There should probably be a configuration file with a list of allowed credit
card types.

No multiple currency support (probably a larger project than just this module).

=head1 SEE ALSO

L<FS::Record>, L<FS::cust_pkg>, L<FS::cust_bill>, L<FS::cust_credit>
L<FS::agent>, L<FS::part_referral>, L<FS::cust_main_county>,
L<FS::cust_main_invoice>, L<FS::UID>, schema.html from the base documentation.

=cut

1;