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Current File : /usr/share/perl5/Amavis/Lookup/SQLfield.pm
# SPDX-License-Identifier: GPL-2.0-or-later

package Amavis::Lookup::SQLfield;
use strict;
use re 'taint';
use warnings;
use warnings FATAL => qw(utf8 void);
no warnings 'uninitialized';
# use warnings 'extra'; no warnings 'experimental::re_strict'; use re 'strict';

BEGIN {
  require Exporter;
  use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $VERSION);
  $VERSION = '2.412';
  @ISA = qw(Exporter);
}

use Amavis::Conf qw($trim_trailing_space_in_lookup_result_fields);
use Amavis::Util qw(ll do_log);

sub new($$$;$$) {
  my($class, $sql_query, $fieldname, $fieldtype, $implied_args) = @_;
  my $self =
    bless { fieldname => $fieldname, fieldtype => $fieldtype }, $class;
  $self->{sql_query} = $sql_query  if defined $sql_query;
  $self->{args} = ref($implied_args) eq 'ARRAY' ? [@$implied_args]  # copy
                  : [$implied_args]  if defined $implied_args;
  $self;
}

# fieldtype: B=boolean, N=numeric, S=string,
#            N-: numeric, nonexistent field returns undef without complaint
#            S-: string,  nonexistent field returns undef without complaint
#            B-: boolean, nonexistent field returns undef without complaint
#            B0: boolean, nonexistent field treated as false
#            B1: boolean, nonexistent field treated as true

sub lookup_sql_field($$$%) {
  my($self, $addr, $get_all, %options) = @_;
  my(@result, @matchingkey, $sql_query, $field);
  if ($self) { $sql_query = $self->{sql_query}; $field = $self->{fieldname} }
  $sql_query = $Amavis::sql_lookups  if !defined $sql_query;  # global default
  if (!defined $self) {
    do_log(5, 'lookup_sql_field - no field query object, "%s" no match',$addr);
  } elsif (!defined $field || $field eq '') {
    do_log(5, 'lookup_sql_field() - no field name, "%s" no match', $addr);
  } elsif (!defined $sql_query) {
    do_log(5, 'lookup_sql_field(%s) - no sql_lookups object, "%s" no match',
              $field, $addr);
  } else {
    my(@result_attr_names) = !ref $field ? ( $field )
                            : ref $field eq 'ARRAY' ? @$field
                            : ref $field eq 'HASH' ? keys %$field : ();
    my(%attr_name_to_sqlfield_name) =
                              ref $field eq 'HASH' ? %$field
                            : map( ($_,$_), @result_attr_names);
    my $fieldtype = $self->{fieldtype};
    $fieldtype = 'S-'  if !defined $fieldtype;
    my($res_ref,$mk_ref) = $sql_query->lookup_sql($addr,1, %options,
              !exists($self->{args}) ? () : (ExtraArguments => $self->{args}));
    if (!defined $res_ref || !@$res_ref) {
      ll(5) && do_log(5, 'lookup_sql_field(%s), "%s" no matching records',
        join(',', map(lc($_) eq lc($attr_name_to_sqlfield_name{$_}) ? $_
                        : $_ . '/' . $attr_name_to_sqlfield_name{$_},
                      @result_attr_names)),  $addr);
    } else {
      my %nosuchfield;
      for my $ind (0 .. $#$res_ref) {
        my($any_field_matches, @match_values_by_ind);
        my $h_ref = $res_ref->[$ind];  my $mk = $mk_ref->[$ind];
        for my $result_attr_ind (0 .. $#result_attr_names) {
          my $result_attr_name = $result_attr_names[$result_attr_ind];
          next  if !defined $result_attr_name;
          my $fieldname = $attr_name_to_sqlfield_name{$result_attr_name};
          next  if !defined $fieldname || $fieldname eq '';
          my $match;
          if (!exists($h_ref->{$fieldname})) {
            $nosuchfield{$fieldname} = 1;
            # record found, but no field with that name in the table
            # fieldtype: B0: boolean, nonexistent field treated as false,
            #            B1: boolean, nonexistent field treated as true
            if ($fieldtype =~ /^.-/s) {   # allowed to not exist
              # this type is almost universally in use now, continue searching
            } elsif ($fieldtype =~ /^B1/) {  # defaults to true
              # only used for the 'local' field
              $match = 1;  # nonexistent field treated as 1
            } elsif ($fieldtype =~ /^B0/) {  # boolean, defaults to false
              # no longer in use
              $match = 0;  # nonexistent field treated as 0
            } else {
              # treated as 'no match', returns undef
            }
          } else {  # field exists
            # fieldtype: B=boolean, N=numeric, S=string
            $match = $h_ref->{$fieldname};
            if (!defined $match) {
              # NULL field values represented as undef
            } elsif ($fieldtype =~ /^B/) {  # boolean
              # convert values 'N', 'F', '0', ' ' and "\000" to 0
              # to allow value to be used directly as a Perl boolean
              $match = 0  if $match =~ /^([NnFf ]|0+|\000+)\ *\z/;
            } elsif ($fieldtype =~ /^N/) {  # numeric
              $match = $match + 0;  # convert string into a number
            } elsif ($fieldtype =~ /^S/) {  # string
              $match =~ s/ +\z//  # trim trailing spaces
                if $trim_trailing_space_in_lookup_result_fields;
            }
          }
          $match_values_by_ind[$result_attr_ind] = $match;
          $any_field_matches = 1  if defined $match;
        }
        ll(5) && do_log(5, 'lookup_sql_field(%s) rec=%d, "%s" result: %s',
          join(',',  map(lc($_) eq lc($attr_name_to_sqlfield_name{$_}) ? $_
                           : $_ . '/' . $attr_name_to_sqlfield_name{$_},
                         @result_attr_names)),
          $ind, $addr,
          join(', ', map(defined $_ ? '"'.$_.'"' : 'undef',
                         @match_values_by_ind)) );
        if ($any_field_matches) {
          push(@matchingkey, $mk);
          push(@result, !ref $field ? $match_values_by_ind[0] :
                 { map( ($result_attr_names[$_], $match_values_by_ind[$_]),
                        grep(defined $match_values_by_ind[$_],
                             (0 .. $#result_attr_names) )) } );
          last  if !$get_all;
        }
      }
      do_log(5, 'lookup_sql_field, no such fields: %s',
             join(', ', keys %nosuchfield))  if ll(5) && %nosuchfield;
    }
  }
  if (!$get_all) { !wantarray ? $result[0] : ($result[0], $matchingkey[0]) }
  else           { !wantarray ? \@result   : (\@result,   \@matchingkey)   }
}

1;

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