# --
# Copyright (C) 2001-2019 OTRS AG, https://otrs.com/
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (GPL). If you
# did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
# --

package Kernel::GenericInterface::Operation::Ticket::Common;

use strict;
use warnings;

use MIME::Base64();
use Mail::Address;

use Kernel::System::VariableCheck qw(:all);

our $ObjectManagerDisabled = 1;

=head1 NAME

Kernel::GenericInterface::Operation::Ticket::Common - Base class for all Ticket Operations

=head1 PUBLIC INTERFACE

=head2 Init()

initialize the operation by checking the web service configuration and gather of the dynamic fields

    my $Return = $CommonObject->Init(
        WebserviceID => 1,
    );

    $Return = {
        Success => 1,                       # or 0 in case of failure,
        ErrorMessage => 'Error Message',
    }

=cut

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

    # check needed
    if ( !$Param{WebserviceID} ) {
        return {
            Success      => 0,
            ErrorMessage => "Got no WebserviceID!",
        };
    }

    # get web service configuration
    my $Webservice = $Kernel::OM->Get('Kernel::System::GenericInterface::Webservice')->WebserviceGet(
        ID => $Param{WebserviceID},
    );

    if ( !IsHashRefWithData($Webservice) ) {
        return {
            Success => 0,
            ErrorMessage =>
                'Could not determine Web service configuration'
                . ' in Kernel::GenericInterface::Operation::Ticket::Common::new()',
        };
    }

    # get the dynamic fields
    my $DynamicField = $Kernel::OM->Get('Kernel::System::DynamicField')->DynamicFieldListGet(
        Valid      => 1,
        ObjectType => [ 'Ticket', 'Article' ],
    );

    # create a Dynamic Fields lookup table (by name)
    DYNAMICFIELD:
    for my $DynamicField ( @{$DynamicField} ) {
        next DYNAMICFIELD if !$DynamicField;
        next DYNAMICFIELD if !IsHashRefWithData($DynamicField);
        next DYNAMICFIELD if !$DynamicField->{Name};
        $Self->{DynamicFieldLookup}->{ $DynamicField->{Name} } = $DynamicField;
    }

    return {
        Success => 1,
    };
}

=head2 ValidateQueue()

checks if the given queue or queue ID is valid.

    my $Success = $CommonObject->ValidateQueue(
        QueueID => 123,
    );

    my $Success = $CommonObject->ValidateQueue(
        Queue   => 'some queue',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{QueueID} && !$Param{Queue};

    my %QueueData;

    # check for Queue name sent
    if (
        $Param{Queue}
        && $Param{Queue} ne ''
        && !$Param{QueueID}
        )
    {
        %QueueData = $Kernel::OM->Get('Kernel::System::Queue')->QueueGet(
            Name => $Param{Queue},
        );

    }

    # otherwise use QueueID
    elsif ( $Param{QueueID} ) {
        %QueueData = $Kernel::OM->Get('Kernel::System::Queue')->QueueGet(
            ID => $Param{QueueID},
        );
    }
    else {
        return;
    }

    # return false if queue data is empty
    return if !IsHashRefWithData( \%QueueData );

    # return false if queue is not valid

    if (
        $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $QueueData{ValidID} ) ne
        'valid'
        )
    {
        return;
    }

    return 1;
}

=head2 ValidateLock()

checks if the given lock or lock ID is valid.

    my $Success = $CommonObject->ValidateLock(
        LockID => 123,
    );

    my $Success = $CommonObject->ValidateLock(
        Lock   => 'some lock',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{LockID} && !$Param{Lock};

    # check for Lock name sent
    if (
        $Param{Lock}
        && $Param{Lock} ne ''
        && !$Param{LockID}
        )
    {
        my $LockID = $Kernel::OM->Get('Kernel::System::Lock')->LockLookup(
            Lock => $Param{Lock},
        );
        return if !$LockID;
    }

    # otherwise use LockID
    elsif ( $Param{LockID} ) {
        my $Lock = $Kernel::OM->Get('Kernel::System::Lock')->LockLookup(
            LockID => $Param{LockID},
        );
        return if !$Lock;
    }
    else {
        return;
    }

    return 1;
}

=head2 ValidateType()

checks if the given type or type ID is valid.

    my $Success = $CommonObject->ValidateType(
        TypeID => 123,
    );

    my $Success = $CommonObject->ValidateType(
        Type   => 'some type',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{TypeID} && !$Param{Type};

    my %TypeData;

    # check for Type name sent
    if (
        $Param{Type}
        && $Param{Type} ne ''
        && !$Param{TypeID}
        )
    {
        %TypeData = $Kernel::OM->Get('Kernel::System::Type')->TypeGet(
            Name => $Param{Type},
        );
    }

    # otherwise use TypeID
    elsif ( $Param{TypeID} ) {
        %TypeData = $Kernel::OM->Get('Kernel::System::Type')->TypeGet(
            ID => $Param{TypeID},
        );
    }
    else {
        return;
    }

    # return false if type data is empty
    return if !IsHashRefWithData( \%TypeData );

    # return false if type is not valid
    if (
        $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $TypeData{ValidID} ) ne
        'valid'
        )
    {
        return;
    }

    return 1;
}

=head2 ValidateCustomer()

checks if the given customer user or customer ID is valid.

    my $Success = $CommonObject->ValidateCustomer(
        CustomerID => 123,
    );

    my $Success = $CommonObject->ValidateCustomer(
        CustomerUser   => 'some type',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{CustomerUser};

    my %CustomerData;

    # check for customer user sent
    if (
        $Param{CustomerUser}
        && $Param{CustomerUser} ne ''
        )
    {
        %CustomerData = $Kernel::OM->Get('Kernel::System::CustomerUser')->CustomerUserDataGet(
            User => $Param{CustomerUser},
        );
    }
    else {
        return;
    }

    # if customer is not registered in the database, check if email is valid
    if ( !IsHashRefWithData( \%CustomerData ) ) {
        return $Self->ValidateFrom( From => $Param{CustomerUser} );
    }

    # if ValidID is present, check if it is valid!
    if ( defined $CustomerData{ValidID} ) {

        # return false if customer is not valid
        if (
            $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $CustomerData{ValidID} ) ne 'valid'
            )
        {
            return;
        }
    }

    return 1;
}

=head2 ValidateService()

checks if the given service or service ID is valid.

    my $Success = $CommonObject->ValidateService(
        ServiceID    => 123,
        CustomerUser => 'Test',
    );

    my $Success = $CommonObject->ValidateService(
        Service      => 'some service',
        CustomerUser => 'Test',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{ServiceID} && !$Param{Service};
    return if !$Param{CustomerUser};

    my %ServiceData;

    # get service object
    my $ServiceObject = $Kernel::OM->Get('Kernel::System::Service');

    # check for Service name sent
    if (
        $Param{Service}
        && $Param{Service} ne ''
        && !$Param{ServiceID}
        )
    {
        %ServiceData = $ServiceObject->ServiceGet(
            Name   => $Param{Service},
            UserID => 1,
        );
    }

    # otherwise use ServiceID
    elsif ( $Param{ServiceID} ) {
        %ServiceData = $ServiceObject->ServiceGet(
            ServiceID => $Param{ServiceID},
            UserID    => 1,
        );
    }
    else {
        return;
    }

    # return false if service data is empty
    return if !IsHashRefWithData( \%ServiceData );

    # return false if service is not valid
    if (
        $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $ServiceData{ValidID} )
        ne 'valid'
        )
    {
        return;
    }

    # get customer services
    my %CustomerServices = $ServiceObject->CustomerUserServiceMemberList(
        CustomerUserLogin => $Param{CustomerUser},
        Result            => 'HASH',
        DefaultServices   => 1,
    );

    # return if user does not have permission to use the service
    return if !$CustomerServices{ $ServiceData{ServiceID} };

    return 1;
}

=head2 ValidateSLA()

checks if the given service or service ID is valid.

    my $Success = $CommonObject->ValidateSLA(
        SLAID     => 12,
        ServiceID => 123,       # || Service => 'some service'
    );

    my $Success = $CommonObject->ValidateService(
        SLA       => 'some SLA',
        ServiceID => 123,       # || Service => 'some service'
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{SLAID}     && !$Param{SLA};
    return if !$Param{ServiceID} && !$Param{Service};

    my %SLAData;

    # get SLA object
    my $SLAObject = $Kernel::OM->Get('Kernel::System::SLA');

    # check for SLA name sent
    if (
        $Param{SLA}
        && $Param{SLA} ne ''
        && !$Param{SLAID}
        )
    {
        my $SLAID = $SLAObject->SLALookup(
            Name => $Param{SLA},
        );
        %SLAData = $SLAObject->SLAGet(
            SLAID  => $SLAID,
            UserID => 1,
        );
    }

    # otherwise use SLAID
    elsif ( $Param{SLAID} ) {
        %SLAData = $SLAObject->SLAGet(
            SLAID  => $Param{SLAID},
            UserID => 1,
        );
    }
    else {
        return;
    }

    # return false if SLA data is empty
    return if !IsHashRefWithData( \%SLAData );

    # return false if SLA is not valid
    if (
        $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $SLAData{ValidID} )
        ne 'valid'
        )
    {
        return;
    }

    # get service ID
    my $ServiceID;
    if (
        $Param{Service}
        && $Param{Service} ne ''
        && !$Param{ServiceID}
        )
    {
        $ServiceID = $Kernel::OM->Get('Kernel::System::Service')->ServiceLookup( Name => $Param{Service} )
            || 0;
    }
    else {
        $ServiceID = $Param{ServiceID} || 0;
    }

    return if !$ServiceID;

    # check if SLA belongs to service
    my $SLABelongsToService;

    SERVICEID:
    for my $SLAServiceID ( @{ $SLAData{ServiceIDs} } ) {
        next SERVICEID if !$SLAServiceID;
        if ( $SLAServiceID eq $ServiceID ) {
            $SLABelongsToService = 1;
            last SERVICEID;
        }
    }

    # return if SLA does not belong to the service
    return if !$SLABelongsToService;

    return 1;
}

=head2 ValidateState()

checks if the given state or state ID is valid.

    my $Success = $CommonObject->ValidateState(
        StateID => 123,
    );

    my $Success = $CommonObject->ValidateState(
        State   => 'some state',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{StateID} && !$Param{State};

    my %StateData;

    # check for State name sent
    if (
        $Param{State}
        && $Param{State} ne ''
        && !$Param{StateID}
        )
    {
        %StateData = $Kernel::OM->Get('Kernel::System::State')->StateGet(
            Name => $Param{State},
        );

    }

    # otherwise use StateID
    elsif ( $Param{StateID} ) {
        %StateData = $Kernel::OM->Get('Kernel::System::State')->StateGet(
            ID => $Param{StateID},
        );
    }
    else {
        return;
    }

    # return false if state data is empty
    return if !IsHashRefWithData( \%StateData );

    # return false if queue is not valid
    if (
        $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $StateData{ValidID} )
        ne 'valid'
        )
    {
        return;
    }

    return 1;
}

=head2 ValidatePriority()

checks if the given priority or priority ID is valid.

    my $Success = $CommonObject->ValidatePriority(
        PriorityID => 123,
    );

    my $Success = $CommonObject->ValidatePriority(
        Priority   => 'some priority',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{PriorityID} && !$Param{Priority};

    my %PriorityData;

    # get priority object
    my $PriorityObject = $Kernel::OM->Get('Kernel::System::Priority');

    # check for Priority name sent
    if (
        $Param{Priority}
        && $Param{Priority} ne ''
        && !$Param{PriorityID}
        )
    {
        my $PriorityID = $PriorityObject->PriorityLookup(
            Priority => $Param{Priority},
        );
        %PriorityData = $PriorityObject->PriorityGet(
            PriorityID => $PriorityID,
            UserID     => 1,
        );
    }

    # otherwise use PriorityID
    elsif ( $Param{PriorityID} ) {
        %PriorityData = $PriorityObject->PriorityGet(
            PriorityID => $Param{PriorityID},
            UserID     => 1,
        );
    }
    else {
        return;
    }

    # return false if priority data is empty
    return if !IsHashRefWithData( \%PriorityData );

    # return false if priority is not valid
    if (
        $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $PriorityData{ValidID} )
        ne 'valid'
        )
    {
        return;
    }

    return 1;
}

=head2 ValidateOwner()

checks if the given owner or owner ID is valid.

    my $Success = $CommonObject->ValidateOwner(
        OwnerID => 123,
    );

    my $Success = $CommonObject->ValidateOwner(
        Owner   => 'some user',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{OwnerID} && !$Param{Owner};

    return $Self->_ValidateUser(
        UserID => $Param{OwnerID} || '',
        User   => $Param{Owner}   || '',
    );
}

=head2 ValidateResponsible()

checks if the given responsible or responsible ID is valid.

    my $Success = $CommonObject->ValidateResponsible(
        ResponsibleID => 123,
    );

    my $Success = $CommonObject->ValidateResponsible(
        Responsible   => 'some user',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{ResponsibleID} && !$Param{Responsible};

    return $Self->_ValidateUser(
        UserID => $Param{ResponsibleID} || '',
        User   => $Param{Responsible}   || '',
    );
}

=head2 ValidatePendingTime()

checks if the given pending time is valid.

    my $Success = $CommonObject->ValidatePendingTime(
        PendingTime => {
            Year   => 2011,
            Month  => 12,
            Day    => 23,
            Hour   => 15,
            Minute => 0,
        },
    );

    my $Success = $CommonObject->ValidatePendingTime(
        PendingTime => {
            Diff => 10080,
        },
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{PendingTime};
    return if !IsHashRefWithData( $Param{PendingTime} );

    # if only the Diff attribute is present, check if it's a valid number and return.
    # Nothing else needs to be checked in that case.
    if ( keys %{ $Param{PendingTime} } == 1 && defined $Param{PendingTime}->{Diff} ) {
        return if $Param{PendingTime}->{Diff} !~ m{\A \d+ \z}msx;
        return 1;
    }
    elsif ( defined $Param{PendingTime}->{Diff} ) {

        # the use of Diff along with any other option is forbidden
        return;
    }

    # check that no time attribute is empty or negative
    for my $TimeAttribute ( sort keys %{ $Param{PendingTime} } ) {
        return if $Param{PendingTime}->{$TimeAttribute} eq '';
        return if int $Param{PendingTime}->{$TimeAttribute} < 0;
    }

    # try to convert pending time to a DateTime object
    my $PendingTime = $Kernel::OM->Create(
        'Kernel::System::DateTime',
        ObjectParams => {
            %{ $Param{PendingTime} },
            Second => 0,
        }
    );
    return if !$PendingTime;

    return 1;
}

=head2 ValidateAutoResponseType()

checks if the given AutoResponseType is valid.

    my $Success = $CommonObject->ValidateAutoResponseType(
        AutoResponseType => 'Some AutoRespobse',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{AutoResponseType};

    # get all AutoResponse Types
    my %AutoResponseType = $Kernel::OM->Get('Kernel::System::AutoResponse')->AutoResponseTypeList();

    return if !%AutoResponseType;

    for my $AutoResponseType ( values %AutoResponseType ) {
        return 1 if $AutoResponseType eq $Param{AutoResponseType};
    }
    return;
}

=head2 ValidateFrom()

checks if the given from is valid.

    my $Success = $CommonObject->ValidateFrom(
        From => 'user@domain.com',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{From};

    # check email address
    for my $Email ( Mail::Address->parse( $Param{From} ) ) {
        if (
            !$Kernel::OM->Get('Kernel::System::CheckItem')->CheckEmail( Address => $Email->address() )
            )
        {
            return;
        }
    }

    return 1;
}

=head2 ValidateArticleCommunicationChannel()

checks if provided Communication Channel is valid.

    my $Success = $CommonObject->ValidateArticleCommunicationChannel(
        CommunicationChannel   => 'Internal',   # optional
                                                # or
        CommunicationChannelID => 1,            # optional
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    if ( !$Param{CommunicationChannel} && !$Param{CommunicationChannelID} ) {
        return;
    }

    my %CommunicationChannel = $Kernel::OM->Get('Kernel::System::CommunicationChannel')->ChannelGet(
        ChannelID   => $Param{CommunicationChannelID},
        ChannelName => $Param{CommunicationChannel},
    );

    return if !%CommunicationChannel;

    # TicketCreate and TicketUpdate operations should only work with MIME based communication channels
    return if $CommunicationChannel{ChannelName} !~ m{\AEmail|Internal|Phone\z}msxi;

    return 1;
}

=head2 ValidateSenderType()

checks if the given SenderType or SenderType ID is valid.

    my $Success = $CommonObject->ValidateSenderType(
        SenderTypeID => 123,
    );

    my $Success = $CommonObject->ValidateenderType(
        SenderType => 'some SenderType',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{SenderTypeID} && !$Param{SenderType};

    my $ArticleObject = $Kernel::OM->Get('Kernel::System::Ticket::Article');

    my %SenderTypeList = $ArticleObject->ArticleSenderTypeList();

    # check for SenderType name sent
    if (
        $Param{SenderType}
        && $Param{SenderType} ne ''
        && !$Param{SenderTypeID}
        )
    {
        my $SenderTypeID = $ArticleObject->ArticleSenderTypeLookup(
            SenderType => $Param{SenderType},
        );

        return if !$SenderTypeID;

        # check if $SenderType is valid
        return if !$SenderTypeList{$SenderTypeID};
    }

    # otherwise use SenderTypeID
    elsif ( $Param{SenderTypeID} ) {
        my $SenderType = $ArticleObject->ArticleSenderTypeLookup(
            SenderTypeID => $Param{SenderTypeID},
        );

        return if !$SenderType;

        # check if $SenderType is valid
        return if !$SenderTypeList{ $Param{SenderTypeID} };
    }
    else {
        return;
    }

    return 1;
}

=head2 ValidateMimeType()

checks if the given MimeType is valid.

    my $Success = $CommonObject->ValidateMimeType(
        MimeTypeID => 'some MimeType',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{MimeType};

    return if $Param{MimeType} !~ m{\A\w+\/\w+\z};

    return 1;
}

=head2 ValidateCharset()

checks if the given Charset is valid.

    my $Success = $CommonObject->ValidateCharset(
        Charset => 'some charset',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{Charset};

    use Encode;
    return if !Encode::resolve_alias( $Param{Charset} );

    return 1;
}

=head2 ValidateHistoryType()

checks if the given HistoryType is valid.

    my $Success = $CommonObject->ValidateHistoryType(
        HistoryType => 'some HostoryType',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{HistoryType};

    # check for HistoryType name sent
    if (
        $Param{HistoryType}
        && $Param{HistoryType} ne ''
        )
    {
        my $HistoryTypeID = $Kernel::OM->Get('Kernel::System::Ticket')->HistoryTypeLookup(
            Type => $Param{HistoryType},
        );

        return if !$HistoryTypeID;
    }
    else {
        return;
    }
    return 1;
}

=head2 ValidateTimeUnit()

checks if the given TimeUnit is valid.

    my $Success = $CommonObject->ValidateTimeUnit(
        TimeUnit => 1,
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{TimeUnit};

    # TimeUnit must be positive
    return if $Param{TimeUnit} !~ m{\A \d+([.,]\d+)? \z}xms;

    return 1;
}

=head2 ValidateUserID()

checks if the given user ID is valid.

    my $Success = $CommonObject->ValidateUserID(
        UserID => 123,
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{UserID};

    return $Self->_ValidateUser(
        UserID => $Param{UserID} || '',
    );
}

=head2 ValidateDynamicFieldName()

checks if the given dynamic field name is valid.

    my $Success = $CommonObject->ValidateDynamicFieldName(
        Name => 'some name',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !IsHashRefWithData( $Self->{DynamicFieldLookup} );
    return if !$Param{Name};

    return if !$Self->{DynamicFieldLookup}->{ $Param{Name} };
    return if !IsHashRefWithData( $Self->{DynamicFieldLookup}->{ $Param{Name} } );

    return 1;
}

=head2 ValidateDynamicFieldValue()

checks if the given dynamic field value is valid.

    my $Success = $CommonObject->ValidateDynamicFieldValue(
        Name  => 'some name',
        Value => 'some value',          # String or Integer or DateTime format
    );

    my $Success = $CommonObject->ValidateDynamicFieldValue(
        Value => [                      # Only for fields that can handle multiple values like
            'some value',               #   Multiselect
            'some other value',
        ],
    );

    returns
    $Success = 1                        # or 0

=cut

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

    # check needed stuff
    return if !IsHashRefWithData( $Self->{DynamicFieldLookup} );

    # possible structures are string and array, no data inside is needed
    if ( !IsString( $Param{Value} ) && ref $Param{Value} ne 'ARRAY' ) {
        return;
    }

    # get dynamic field config
    my $DynamicFieldConfig = $Self->{DynamicFieldLookup}->{ $Param{Name} };

    # Validate value.
    my $ValidateValue = $Kernel::OM->Get('Kernel::System::DynamicField::Backend')->FieldValueValidate(
        DynamicFieldConfig => $DynamicFieldConfig,
        Value              => $Param{Value},
        UserID             => 1,
    );

    return $ValidateValue;
}

=head2 ValidateDynamicFieldObjectType()

checks if the given dynamic field name is valid.

    my $Success = $CommonObject->ValidateDynamicFieldObjectType(
        Name    => 'some name',
        Article => 1,               # if article exists
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !IsHashRefWithData( $Self->{DynamicFieldLookup} );
    return if !$Param{Name};

    return if !$Self->{DynamicFieldLookup}->{ $Param{Name} };
    return if !IsHashRefWithData( $Self->{DynamicFieldLookup}->{ $Param{Name} } );

    my $DynamicFieldConfg = $Self->{DynamicFieldLookup}->{ $Param{Name} };
    return if $DynamicFieldConfg->{ObjectType} eq 'Article' && !$Param{Article};

    return 1;
}

=head2 SetDynamicFieldValue()

sets the value of a dynamic field.

    my $Result = $CommonObject->SetDynamicFieldValue(
        Name      => 'some name',           # the name of the dynamic field
        Value     => 'some value',          # String or Integer or DateTime format
        TicketID  => 123
        ArticleID => 123
        UserID    => 123,
    );

    my $Result = $CommonObject->SetDynamicFieldValue(
        Name   => 'some name',           # the name of the dynamic field
        Value => [
            'some value',
            'some other value',
        ],
        UserID => 123,
    );

    returns
    $Result = {
        Success => 1,                        # if everything is ok
    }

    $Result = {
        Success      => 0,
        ErrorMessage => 'Error description'
    }

=cut

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

    # check needed stuff
    for my $Needed (qw(Name UserID)) {
        if ( !IsString( $Param{$Needed} ) ) {
            return {
                Success      => 0,
                ErrorMessage => "SetDynamicFieldValue() Invalid value for $Needed, just string is allowed!"
            };
        }
    }

    # check value structure
    if ( !IsString( $Param{Value} ) && ref $Param{Value} ne 'ARRAY' ) {
        return {
            Success      => 0,
            ErrorMessage => "SetDynamicFieldValue() Invalid value for Value, just string and array are allowed!"
        };
    }

    return if !IsHashRefWithData( $Self->{DynamicFieldLookup} );

    # get dynamic field config
    my $DynamicFieldConfig = $Self->{DynamicFieldLookup}->{ $Param{Name} };

    my $ObjectID;
    if ( $DynamicFieldConfig->{ObjectType} eq 'Ticket' ) {
        $ObjectID = $Param{TicketID} || '';
    }
    else {
        $ObjectID = $Param{ArticleID} || '';
    }

    if ( !$ObjectID ) {
        return {
            Success      => 0,
            ErrorMessage => "SetDynamicFieldValue() Could not set $ObjectID!",
        };
    }

    my $Success = $Kernel::OM->Get('Kernel::System::DynamicField::Backend')->ValueSet(
        DynamicFieldConfig => $DynamicFieldConfig,
        ObjectID           => $ObjectID,
        Value              => $Param{Value},
        UserID             => $Param{UserID},
    );

    return {
        Success => $Success,
    };
}

=head2 CreateAttachment()

creates a new attachment for the given article.

    my $Result = $CommonObject->CreateAttachment(
        TicketID   => 123,
        Attachment => $Data,                   # file content (Base64 encoded)
        ArticleID  => 456,
        UserID     => 123,
    );

    returns
    $Result = {
        Success => 1,                        # if everything is ok
    }

    $Result = {
        Success      => 0,
        ErrorMessage => 'Error description'
    }

=cut

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

    # check needed stuff
    for my $Needed (qw(TicketID Attachment ArticleID UserID)) {
        if ( !$Param{$Needed} ) {
            return {
                Success      => 0,
                ErrorMessage => "CreateAttachment() Got no $Needed!"
            };
        }
    }

    my $ArticleBackendObject = $Kernel::OM->Get('Kernel::System::Ticket::Article')->BackendForArticle(
        TicketID  => $Param{TicketID},
        ArticleID => $Param{ArticleID},
    );

    # write attachment
    my $Success = $ArticleBackendObject->ArticleWriteAttachment(
        %{ $Param{Attachment} },
        Content   => MIME::Base64::decode_base64( $Param{Attachment}->{Content} ),
        ArticleID => $Param{ArticleID},
        UserID    => $Param{UserID},
    );

    return {
        Success => $Success,
    };
}

=head2 CheckCreatePermissions ()

Tests if the user have the permissions to create a ticket on a determined queue

    my $Result = $CommonObject->CheckCreatePermissions(
        Ticket     => $TicketHashReference,
        UserID     => 123,                      # or 'CustomerLogin'
        UserType   => 'Agent',                  # or 'Customer'
    );

returns:
    $Success = 1                                # if everything is OK

=cut

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

    # check needed stuff
    for my $Needed (qw(Ticket UserID UserType)) {
        if ( !$Param{$Needed} ) {
            return;
        }
    }

    # get create permission groups
    my %UserGroups;

    if ( $Param{UserType} ne 'Customer' ) {
        %UserGroups = $Kernel::OM->Get('Kernel::System::Group')->PermissionUserGet(
            UserID => $Param{UserID},
            Type   => 'create',
        );
    }
    else {
        %UserGroups = $Kernel::OM->Get('Kernel::System::CustomerGroup')->GroupMemberList(
            UserID => $Param{UserID},
            Type   => 'create',
            Result => 'HASH',
        );
    }

    my %QueueData;
    if ( defined $Param{Ticket}->{Queue} && $Param{Ticket}->{Queue} ne '' ) {
        %QueueData = $Kernel::OM->Get('Kernel::System::Queue')->QueueGet( Name => $Param{Ticket}->{Queue} );
    }
    else {
        %QueueData = $Kernel::OM->Get('Kernel::System::Queue')->QueueGet( ID => $Param{Ticket}->{QueueID} );
    }

    # permission check, can we create new tickets in queue
    return if !$UserGroups{ $QueueData{GroupID} };

    return 1;
}

=head2 CheckAccessPermissions()

Tests if the user have access permissions over a ticket

    my $Result = $CommonObject->CheckAccessPermissions(
        TicketID   => 123,
        UserID     => 123,                      # or 'CustomerLogin'
        UserType   => 'Agent',                  # or 'Customer'
    );

returns:
    $Success = 1                                # if everything is OK

=cut

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

    # check needed stuff
    for my $Needed (qw(TicketID UserID UserType)) {
        if ( !$Param{$Needed} ) {
            return;
        }
    }

    my $TicketPermissionFunction = 'TicketPermission';
    if ( $Param{UserType} eq 'Customer' ) {
        $TicketPermissionFunction = 'TicketCustomerPermission';
    }

    my $Access = $Kernel::OM->Get('Kernel::System::Ticket')->$TicketPermissionFunction(
        Type     => 'ro',
        TicketID => $Param{TicketID},
        UserID   => $Param{UserID},
    );

    return $Access;
}

=begin Internal:

=head2 _ValidateUser()

checks if the given user or user ID is valid.

    my $Success = $CommonObject->_ValidateUser(
        UserID => 123,
    );

    my $Success = $CommonObject->_ValidateUser(
        User   => 'some user',
    );

    returns
    $Success = 1            # or 0

=cut

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

    # check needed stuff
    return if !$Param{UserID} && !$Param{User};

    my %UserData;

    # check for User name sent
    if (
        $Param{User}
        && $Param{User} ne ''
        && !$Param{UserID}
        )
    {
        %UserData = $Kernel::OM->Get('Kernel::System::User')->GetUserData(
            User  => $Param{User},
            Valid => 1,
        );
    }

    # otherwise use UserID
    elsif ( $Param{UserID} ) {
        %UserData = $Kernel::OM->Get('Kernel::System::User')->GetUserData(
            UserID => $Param{UserID},
            Valid  => 1,
        );
    }
    else {
        return;
    }

    # return false if priority data is empty
    return if !IsHashRefWithData( \%UserData );

    return 1;
}

1;

=end Internal:

=head1 TERMS AND CONDITIONS

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

This software comes with ABSOLUTELY NO WARRANTY. For details, see
the enclosed file COPYING for license information (GPL). If you
did not receive this file, see L<https://www.gnu.org/licenses/gpl-3.0.txt>.

=cut