# --
# Kernel/System/DynamicField/Backend/Dropdown.pm - Delegate for DynamicField Dropdown backend
# Copyright (C) 2001-2012 OTRS AG, http://otrs.org/
# --
# $Id: Dropdown.pm,v 1.60 2012/03/20 16:27:56 mg Exp $
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (AGPL). If you
# did not receive this file, see http://www.gnu.org/licenses/agpl.txt.
# --

package Kernel::System::DynamicField::Backend::Dropdown;

use strict;
use warnings;

use Kernel::System::VariableCheck qw(:all);
use Kernel::System::DynamicFieldValue;
use Kernel::System::DynamicField::Backend::BackendCommon;

use vars qw($VERSION);
$VERSION = qw($Revision: 1.60 $) [1];

=head1 NAME

Kernel::System::DynamicField::Backend::Dropdown

=head1 SYNOPSIS

DynamicFields Dropdown backend delegate

=head1 PUBLIC INTERFACE

This module implements the public interface of L<Kernel::System::DynamicField::Backend>.
Please look there for a detailed reference of the functions.

=over 4

=item new()

usually, you want to create an instance of this
by using Kernel::System::DynamicField::Backend->new();

=cut

sub new {
    my ( $Type, %Param ) = @_;

    # allocate new hash for object
    my $Self = {};
    bless( $Self, $Type );

    # get needed objects
    for my $Needed (qw(ConfigObject EncodeObject LogObject MainObject DBObject)) {
        die "Got no $Needed!" if !$Param{$Needed};

        $Self->{$Needed} = $Param{$Needed};
    }

    # create additional objects
    $Self->{DynamicFieldValueObject} = Kernel::System::DynamicFieldValue->new( %{$Self} );
    $Self->{BackendCommonObject}
        = Kernel::System::DynamicField::Backend::BackendCommon->new( %{$Self} );

    return $Self;
}

sub ValueGet {
    my ( $Self, %Param ) = @_;

    my $DFValue = $Self->{DynamicFieldValueObject}->ValueGet(
        FieldID  => $Param{DynamicFieldConfig}->{ID},
        ObjectID => $Param{ObjectID},
    );

    return if !$DFValue;
    return if !IsArrayRefWithData($DFValue);
    return if !IsHashRefWithData( $DFValue->[0] );

    return $DFValue->[0]->{ValueText};
}

sub ValueSet {
    my ( $Self, %Param ) = @_;

    # check for valid possible values list
    if ( !$Param{DynamicFieldConfig}->{Config}->{PossibleValues} ) {
        $Self->{LogObject}->Log(
            Priority => 'error',
            Message  => "Need PossibleValues in DynamicFieldConfig!",
        );
        return;
    }

    my $Success = $Self->{DynamicFieldValueObject}->ValueSet(
        FieldID  => $Param{DynamicFieldConfig}->{ID},
        ObjectID => $Param{ObjectID},
        Value    => [
            {
                ValueText => $Param{Value},
            },
        ],
        UserID => $Param{UserID},
    );

    return $Success;
}

sub ValueDelete {
    my ( $Self, %Param ) = @_;

    my $Success = $Self->{DynamicFieldValueObject}->ValueDelete(
        FieldID  => $Param{DynamicFieldConfig}->{ID},
        ObjectID => $Param{ObjectID},
        UserID   => $Param{UserID},
    );

    return $Success;
}

sub AllValuesDelete {
    my ( $Self, %Param ) = @_;

    my $Success = $Self->{DynamicFieldValueObject}->AllValuesDelete(
        FieldID => $Param{DynamicFieldConfig}->{ID},
        UserID  => $Param{UserID},
    );

    return $Success;
}

sub ValueValidate {
    my ( $Self, %Param ) = @_;

    my $Success = $Self->{DynamicFieldValueObject}->ValueValidate(
        Value => {
            ValueText => $Param{Value},
        },
        UserID => $Param{UserID}
    );

    return $Success;
}

sub SearchSQLGet {
    my ( $Self, %Param ) = @_;

    my %Operators = (
        Equals            => '=',
        GreaterThan       => '>',
        GreaterThanEquals => '>=',
        SmallerThan       => '<',
        SmallerThanEquals => '<=',
    );

    if ( $Operators{ $Param{Operator} } ) {
        my $SQL = " $Param{TableAlias}.value_text $Operators{$Param{Operator}} '";
        $SQL .= $Self->{DBObject}->Quote( $Param{SearchTerm} ) . "' ";
        return $SQL;
    }

    if ( $Param{Operator} eq 'Like' ) {

        my $SQL = $Self->{DBObject}->QueryCondition(
            Key   => "$Param{TableAlias}.value_text",
            Value => $Param{SearchTerm},
        );

        return $SQL;
    }

    $Self->{'LogObject'}->Log(
        'Priority' => 'error',
        'Message'  => "Unsupported Operator $Param{Operator}",
    );

    return;
}

sub SearchSQLOrderFieldGet {
    my ( $Self, %Param ) = @_;

    return "$Param{TableAlias}.value_text";
}

sub EditFieldRender {
    my ( $Self, %Param ) = @_;

    # take config from field config
    my $FieldConfig = $Param{DynamicFieldConfig}->{Config};
    my $FieldName   = 'DynamicField_' . $Param{DynamicFieldConfig}->{Name};
    my $FieldLabel  = $Param{DynamicFieldConfig}->{Label};

    my $Value = '';

    # set the field value or default
    if ( $Param{UseDefaultValue} ) {
        $Value = ( defined $FieldConfig->{DefaultValue} ? $FieldConfig->{DefaultValue} : '' );
    }
    $Value = $Param{Value} if defined $Param{Value};

    # extract the dynamic field value form the web request
    my $FieldValue = $Self->EditFieldValueGet(
        %Param,
    );

    # set values from ParamObject if present
    if ( defined $FieldValue ) {
        $Value = $FieldValue;
    }

    # check and set class if necessary
    my $FieldClass = 'DynamicFieldText';
    if ( defined $Param{Class} && $Param{Class} ne '' ) {
        $FieldClass .= ' ' . $Param{Class};
    }

    # set field as mandatory
    $FieldClass .= ' Validate_Required' if $Param{Mandatory};

    # set error css class
    $FieldClass .= ' ServerError' if $Param{ServerError};

    # set PossibleValues
    my $SelectionData = $FieldConfig->{PossibleValues};

    # use PossibleValuesFilter if defined
    $SelectionData = $Param{PossibleValuesFilter}
        if defined $Param{PossibleValuesFilter};

    # set PossibleNone attribute
    my $FieldPossibleNone;
    if ( defined $Param{OverridePossibleNone} ) {
        $FieldPossibleNone = $Param{OverridePossibleNone};
    }
    else {
        $FieldPossibleNone = $FieldConfig->{PossibleNone} || 0;
    }

    my $HTMLString = $Param{LayoutObject}->BuildSelection(
        Data => $SelectionData || {},
        Name => $FieldName,
        SelectedID   => $Value,
        Translation  => $FieldConfig->{TranslatableValues} || 0,
        PossibleNone => $FieldPossibleNone,
        Class        => $FieldClass,
        HTMLQuote    => 1,
    );

    if ( $Param{Mandatory} ) {
        my $DivID = $FieldName . 'Error';

        # for client side validation
        $HTMLString .= <<"EOF";

    <div id="$DivID" class="TooltipErrorMessage">
        <p>
            \$Text{"This field is required."}
        </p>
    </div>
EOF
    }

    if ( $Param{ServerError} ) {

        my $ErrorMessage = $Param{ErrorMessage} || 'This field is required.';
        my $DivID = $FieldName . 'ServerError';

        # for server side validation
        $HTMLString .= <<"EOF";
    <div id="$DivID" class="TooltipErrorMessage">
        <p>
            \$Text{"$ErrorMessage"}
        </p>
    </div>
EOF
    }

    if ( $Param{AJAXUpdate} ) {

        my $FieldSelector = '#' . $FieldName;

        my $FieldsToUpdate;
        if ( IsArrayRefWithData( $Param{UpdatableFields} ) ) {
            my $FirstItem = 1;
            FIELD:
            for my $Field ( @{ $Param{UpdatableFields} } ) {
                next FIELD if $Field eq $FieldName;
                if ($FirstItem) {
                    $FirstItem = 0;
                }
                else {
                    $FieldsToUpdate .= ', ';
                }
                $FieldsToUpdate .= "'" . $Field . "'";
            }
        }

        #add js to call FormUpdate()
        $HTMLString .= <<"EOF";
<!--dtl:js_on_document_complete-->
<script type="text/javascript">//<![CDATA[
    \$('$FieldSelector').bind('change', function (Event) {
        Core.AJAX.FormUpdate(\$(this).parents('form'), 'AJAXUpdate', '$FieldName', [ $FieldsToUpdate ]);
    });
//]]></script>
<!--dtl:js_on_document_complete-->
EOF
    }

    if ( $Param{SubmitOnChange} ) {

        my $FieldSelector = '#' . $FieldName;

        #add js to disable validation and do submit()
        $HTMLString .= <<"EOF";
<!--dtl:js_on_document_complete-->
<script type="text/javascript">//<![CDATA[
    \$('$FieldSelector').bind('change', function (Event) {
        // make sure the ticket is not yet created on queue change
        \$('input#Expand').val(1);
        Core.Form.Validate.DisableValidation(\$(this).closest('form'));
        \$(this).closest('form').submit();
    });
//]]></script>
<!--dtl:js_on_document_complete-->
EOF
    }

    # call EditLabelRender on the common backend
    my $LabelString = $Self->{BackendCommonObject}->EditLabelRender(
        DynamicFieldConfig => $Param{DynamicFieldConfig},
        Mandatory          => $Param{Mandatory} || '0',
        FieldName          => $FieldName,
    );

    my $Data = {
        Field => $HTMLString,
        Label => $LabelString,
    };

    return $Data;
}

sub EditFieldValueGet {
    my ( $Self, %Param ) = @_;

    my $FieldName = 'DynamicField_' . $Param{DynamicFieldConfig}->{Name};

    my $Value;

    # check if there is a Template and retreive the dinalic field value from there
    if ( IsHashRefWithData( $Param{Template} ) ) {
        $Value = $Param{Template}->{$FieldName};
    }

    # otherwise get dynamic field value form param
    else {
        $Value = $Param{ParamObject}->GetParam( Param => $FieldName );
    }

    if ( defined $Param{ReturnTemplateStructure} && $Param{ReturnTemplateStructure} eq 1 ) {
        return {
            $FieldName => $Value,
        };
    }

    # for this field the normal return an the ReturnValueStructure are the same
    return $Value;
}

sub EditFieldValueValidate {
    my ( $Self, %Param ) = @_;

    # get the field value from the http request
    my $Value = $Self->EditFieldValueGet(
        DynamicFieldConfig => $Param{DynamicFieldConfig},
        ParamObject        => $Param{ParamObject},

        # not necessary for this backend but place it for consistency reasons
        ReturnValueStructure => 1,
    );

    my $ServerError;
    my $ErrorMessage;

    # perform necessary validations
    if ( $Param{Mandatory} && !$Value ) {
        return {
            ServerError => 1,
        };
    }
    else {

        # get possible values list
        my $PossibleValues = $Param{DynamicFieldConfig}->{Config}->{PossibleValues};

        # overwrite possible values if PossibleValuesFilter
        if ( defined $Param{PossibleValuesFilter} ) {
            $PossibleValues = $Param{PossibleValuesFilter}
        }

        # validate if value is in possible values list (but let pass empty values)
        if ( $Value && !$PossibleValues->{$Value} ) {
            $ServerError  = 1;
            $ErrorMessage = 'The field content is invalid';
        }
    }

    # create resulting structure
    my $Result = {
        ServerError  => $ServerError,
        ErrorMessage => $ErrorMessage,
    };

    return $Result;
}

sub DisplayValueRender {
    my ( $Self, %Param ) = @_;

    # set HTMLOuput as default if not specified
    if ( !defined $Param{HTMLOutput} ) {
        $Param{HTMLOutput} = 1;
    }

    # get raw Value strings from field value
    my $Value = defined $Param{Value} ? $Param{Value} : '';

    # get real value
    if ( $Param{DynamicFieldConfig}->{Config}->{PossibleValues}->{$Value} ) {

        # get readeable value
        $Value = $Param{DynamicFieldConfig}->{Config}->{PossibleValues}->{$Value};
    }

    # check is needed to translate values
    if ( $Param{DynamicFieldConfig}->{Config}->{TranslatableValues} ) {

        # translate value
        $Value = $Param{LayoutObject}->{LanguageObject}->Get($Value);
    }

    # set title as value after update and before limit
    my $Title = $Value;

    # HTMLOuput transformations
    if ( $Param{HTMLOutput} ) {
        $Value = $Param{LayoutObject}->Ascii2Html(
            Text => $Value,
            Max => $Param{ValueMaxChars} || '',
        );

        $Title = $Param{LayoutObject}->Ascii2Html(
            Text => $Title,
            Max => $Param{TitleMaxChars} || '',
        );
    }
    else {
        if ( $Param{ValueMaxChars} && length($Value) > $Param{ValueMaxChars} ) {
            $Value = substr( $Value, 0, $Param{ValueMaxChars} ) . '...';
        }
        if ( $Param{TitleMaxChars} && length($Title) > $Param{TitleMaxChars} ) {
            $Title = substr( $Title, 0, $Param{TitleMaxChars} ) . '...';
        }
    }

    # set field link form config
    my $Link = $Param{DynamicFieldConfig}->{Config}->{Link} || '';

    my $Data = {
        Value => $Value,
        Title => $Title,
        Link  => $Link,
    };

    return $Data;
}

sub IsSortable {
    my ( $Self, %Param ) = @_;

    return 1;
}

sub SearchFieldRender {
    my ( $Self, %Param ) = @_;

    # take config from field config
    my $FieldConfig = $Param{DynamicFieldConfig}->{Config};
    my $FieldName   = 'Search_DynamicField_' . $Param{DynamicFieldConfig}->{Name};
    my $FieldLabel  = $Param{DynamicFieldConfig}->{Label};

    my $Value;

    my @DefaultValue;

    if ( defined $Param{DefaultValue} ) {
        my @DefaultValue = split /;/, $Param{DefaultValue};
    }

    # set the field value
    if (@DefaultValue) {
        $Value = \@DefaultValue;
    }

    # get the field value, this fuction is always called after the profile is loaded
    my $FieldValues = $Self->SearchFieldValueGet(
        %Param,
    );

    if ( defined $FieldValues ) {
        $Value = $FieldValues;
    }

    # check and set class if necessary
    my $FieldClass = 'DynamicFieldMultiSelect';

    # set PossibleValues
    my $SelectionData = $FieldConfig->{PossibleValues};

    # get historical values from database
    my $HistoricalValues = $Self->{DynamicFieldValueObject}->HistoricalValueGet(
        FieldID   => $Param{DynamicFieldConfig}->{ID},
        ValueType => 'Text,',
    );

    # add historic values to current values (if they don't exist anymore)
    for my $Key ( keys %{$HistoricalValues} ) {
        if ( !$SelectionData->{$Key} ) {
            $SelectionData->{$Key} = $HistoricalValues->{$Key}
        }
    }

    # use PossibleValuesFilter if defined
    $SelectionData = $Param{PossibleValuesFilter}
        if defined $Param{PossibleValuesFilter};

    my $HTMLString = $Param{LayoutObject}->BuildSelection(
        Data         => $SelectionData,
        Name         => $FieldName,
        SelectedID   => $Value,
        Translation  => $FieldConfig->{TranslatableValues} || 0,
        PossibleNone => 0,
        Class        => $FieldClass,
        Multiple     => 1,
        HTMLQuote    => 1,
    );

    # call EditLabelRender on the common backend
    my $LabelString = $Self->{BackendCommonObject}->EditLabelRender(
        DynamicFieldConfig => $Param{DynamicFieldConfig},
        FieldName          => $FieldName,
    );

    my $Data = {
        Field => $HTMLString,
        Label => $LabelString,
    };

    return $Data;
}

sub SearchFieldValueGet {
    my ( $Self, %Param ) = @_;

    my $Value;

    # get dynamic field value form param object
    if ( defined $Param{ParamObject} ) {
        my @FieldValues = $Param{ParamObject}
            ->GetArray( Param => 'Search_DynamicField_' . $Param{DynamicFieldConfig}->{Name} );

        $Value = \@FieldValues;
    }

    # otherwise get the value from the profile
    elsif ( defined $Param{Profile} ) {
        $Value = $Param{Profile}->{ 'Search_DynamicField_' . $Param{DynamicFieldConfig}->{Name} };
    }
    else {
        return;
    }

    if ( defined $Param{ReturnProfileStructure} && $Param{ReturnProfileStructure} eq 1 ) {
        return {
            'Search_DynamicField_' . $Param{DynamicFieldConfig}->{Name} => $Value,
        };
    }

    return $Value;

}

sub SearchFieldParameterBuild {
    my ( $Self, %Param ) = @_;

    # get field value
    my $Value = $Self->SearchFieldValueGet(%Param);

    my $DisplayValue;

    if ($Value) {
        if ( ref $Value eq 'ARRAY' ) {

            my @DisplayItemList;
            for my $Item ( @{$Value} ) {

                # set the display value
                my $DisplayItem = $Param{DynamicFieldConfig}->{Config}->{PossibleValues}->{$Item}
                    || $Item;
                if ( $Param{DynamicFieldConfig}->{Config}->{TranslatableValues} ) {

                    # translate the value
                    $DisplayItem = $Param{LayoutObject}->{LanguageObject}->Get($DisplayValue);
                }

                push @DisplayItemList, $DisplayItem;
            }

            # combine different values into one string
            $DisplayValue = join ' + ', @DisplayItemList;
        }
        else {

            # set the display value
            $DisplayValue = $Param{DynamicFieldConfig}->{PossibleValues}->{$Value};

            if ( $Param{DynamicFieldConfig}->{Config}->{TranslatableValues} ) {

                # translate the value
                $DisplayValue = $Param{LayoutObject}->{LanguageObject}->Get($DisplayValue);
            }
        }
    }

    # return search parameter structure
    return {
        Parameter => {
            Equals => $Value,
        },
        Display => $DisplayValue,
    };
}

sub StatsFieldParameterBuild {
    my ( $Self, %Param ) = @_;

    # set PossibleValues
    my $Values = $Param{DynamicFieldConfig}->{Config}->{PossibleValues};

    # get historical values from database
    my $HistoricalValues = $Self->{DynamicFieldValueObject}->HistoricalValueGet(
        FieldID   => $Param{DynamicFieldConfig}->{ID},
        ValueType => 'Text,',
    );

    # add historic values to current values (if they don't exist anymore)
    for my $Key ( keys %{$HistoricalValues} ) {
        if ( !$Values->{$Key} ) {
            $Values->{$Key} = $HistoricalValues->{$Key}
        }
    }

    # use PossibleValuesFilter if defined
    $Values = $Param{PossibleValuesFilter}
        if defined $Param{PossibleValuesFilter};

    return {
        Values             => $Values,
        Name               => $Param{DynamicFieldConfig}->{Label},
        Element            => 'DynamicField_' . $Param{DynamicFieldConfig}->{Name},
        TranslatableValues => $Param{DynamicFieldconfig}->{Config}->{TranslatableValues},
    };
}

sub CommonSearchFieldParameterBuild {
    my ( $Self, %Param ) = @_;

    my $Operator = 'Equals';
    my $Value    = $Param{Value};

    return {
        $Operator => $Value,
    };
}

sub ReadableValueRender {
    my ( $Self, %Param ) = @_;

    my $Value = defined $Param{Value} ? $Param{Value} : '';

    # set title as value after update and before limit
    my $Title = $Value;

    # cut strings if needed
    if ( $Param{ValueMaxChars} && length($Value) > $Param{ValueMaxChars} ) {
        $Value = substr( $Value, 0, $Param{ValueMaxChars} ) . '...';
    }
    if ( $Param{TitleMaxChars} && length($Title) > $Param{TitleMaxChars} ) {
        $Title = substr( $Title, 0, $Param{TitleMaxChars} ) . '...';
    }

    my $Data = {
        Value => $Value,
        Title => $Title,
    };

    return $Data;
}

sub TemplateValueTypeGet {
    my ( $Self, %Param ) = @_;

    my $FieldName = 'DynamicField_' . $Param{DynamicFieldConfig}->{Name};

    # set the field types
    my $EditValueType   = 'SCALAR';
    my $SearchValueType = 'ARRAY';

    # return the correct structure
    if ( $Param{FieldType} eq 'Edit' ) {
        return {
            $FieldName => $EditValueType,
            }
    }
    elsif ( $Param{FieldType} eq 'Search' ) {
        return {
            'Search_' . $FieldName => $SearchValueType,
            }
    }
    else {
        return {
            $FieldName             => $EditValueType,
            'Search_' . $FieldName => $SearchValueType,
            }
    }
}

sub IsAJAXUpdateable {
    my ( $Self, %Param ) = @_;

    return 1;
}

sub RandomValueSet {
    my ( $Self, %Param ) = @_;

    my $Value = int( rand(500) );

    my $Success = $Self->ValueSet(
        %Param,
        Value => $Value,
    );

    if ( !$Success ) {
        return {
            Success => 0,
        };
    }
    return {
        Success => 1,
        Value   => $Value,
    };
}

sub IsMatchable {
    my ( $Self, %Param ) = @_;

    return 1;
}

sub ObjectMatch {
    my ( $Self, %Param ) = @_;

    my $FieldName = 'DynamicField_' . $Param{DynamicFieldConfig}->{Name};

    # return false if not match
    if ( $Param{ObjectAttributes}->{$FieldName} ne $Param{Value} ) {
        return 0;
    }

    return 1;
}

sub AJAXPossibleValuesGet {
    my ( $Self, %Param ) = @_;

    # to store the possible values
    my %PossibleValues;

    # set none value if defined on field config
    if ( $Param{DynamicFieldConfig}->{Config}->{PossibleNone} ) {
        %PossibleValues = ( '' => '-' );
    }

    # set all other possible values if defined on field config
    if ( IsHashRefWithData( $Param{DynamicFieldConfig}->{Config}->{PossibleValues} ) ) {
        %PossibleValues = (
            %PossibleValues,
            %{ $Param{DynamicFieldConfig}->{Config}->{PossibleValues} },
        );
    }

    # retrun the possible values hash as a reference
    return \%PossibleValues;
}

1;

=back

=head1 TERMS AND CONDITIONS

This software is part of the OTRS project (L<http://otrs.org/>).

This software comes with ABSOLUTELY NO WARRANTY. For details, see
the enclosed file COPYING for license information (AGPL). If you
did not receive this file, see L<http://www.gnu.org/licenses/agpl.txt>.

=cut

=head1 VERSION

$$

=cut
