NAME
    RT::Extension::ConditionalCustomFields - CF conditioned by the value of
    another CF

DESCRIPTION
    This plugin provides the ability to display/edit a custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – called
    the "conditioned by custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>"
    throughout this documentation – conditioned by the value of another
    custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – the
    "condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>" – for the
    same object, which can be anything that can have custom fields (ticket
    <https://docs.bestpractical.com/rt/5.0.4/RT/Ticket.html>, queue
    <https://docs.bestpractical.com/rt/5.0.4/RT/Queue.html>, user
    <https://docs.bestpractical.com/rt/5.0.4/RT/User.html>, group
    <https://docs.bestpractical.com/rt/5.0.4/RT/Group.html>, article
    <https://docs.bestpractical.com/rt/5.0.4/RT/Article.html> or asset
    <https://docs.bestpractical.com/rt/5.0.4/RT/Asset.html>).

    The condition can be setup on the Admin page for editing the conditioned
    by custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>. From
    version 0.99, any custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> can be
    chosen as the condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> (whereas
    for earlier version, only Select custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> were
    eligible), and you can specify which operator is to be applied against
    which value(s) for the condition to be met.

    Available operators are:

    *   is

        The condition is met if and only if the current value of the
        instanciated conditioned by custom field
        <https://docs.bestpractical.com/rt/5.0.4/RT/ObjectCustomField.html>
        is equal to the value (or one of the values, see below for
        multivalued condition) setup for this condition. With isn't operator
        described below, is operator is the only one which is eligible for
        selectable custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – with
        Select, Combobox or Autocomplete type –, since their values are to
        be selected from a set of values. For Date and DateTime custom
        fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, this
        operator is named on.

    *   isn't

        The condition is met if and only if the current value of the
        instanciated conditioned by custom field
        <https://docs.bestpractical.com/rt/5.0.4/RT/Queue.html> is different
        from the value (or none of the values, see below for multivalued
        condition) setup for this condition. With is operator described
        above, isn't operator is the only one which is eligible for
        selectable custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – with
        Select, Combobox or Autocomplete type –, since their values are to
        be selected from a set of values. For Date and DateTime custom
        fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, this
        operator is named not on.

    *   match

        The condition is met if and only if the current value of the
        instanciated conditioned by custom field
        <https://docs.bestpractical.com/rt/5.0.4/RT/ObjectCustomField.html>
        is included in the value setup for this condition, typically if the
        current value is a substring of the condition value. As said above,
        selectable custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – with
        Select, Combobox or Autocomplete type are not eligible for this
        operator. Also, Date and DateTime custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> are
        not eligible for this operator.

    *   doesn't match

        The condition is met if and only if the current value of the
        instanciated conditioned by custom field
        <https://docs.bestpractical.com/rt/5.0.4/RT/ObjectCustomField.html>
        isn't included in the value setup for this condition, typically if
        the current value isn't a substring of the condition value. As said
        above, selectable custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – with
        Select, Combobox or Autocomplete type are not eligible for this
        operator. Also, Date and DateTime custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> are
        not eligible for this operator.

    *   less than

        The condition is met if and only if the current value of the
        instanciated conditioned by custom field
        <https://docs.bestpractical.com/rt/5.0.4/RT/ObjectCustomField.html>
        is less than or equal to the value setup for this condition. The
        comparison is achieved according to some kind of natural sort order
        <https://en.wikipedia.org/wiki/Natural_sort_order>, that is: number
        values are compared as numbers, strings are compared alphabetically,
        insensitive to case and accents (a = á, a = A). Moreover, IP
        Adresses (IPv4 and IPv6) are expanded to be compared as expected. As
        said above, selectable custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – with
        Select, Combobox or Autocomplete type are not eligible for this
        operator.

    *   greater than

        The condition is met if and only if the current value of the
        instanciated conditioned by custom field
        <https://docs.bestpractical.com/rt/5.0.4/RT/ObjectCustomField.html>
        is greater than or equal to the value setup for this condition. The
        comparison is achieved according to some kind of natural sort order
        <https://en.wikipedia.org/wiki/Natural_sort_order>, that is: number
        values are compared as numbers, strings are compared alphabetically,
        insensitive to case and accents (a = á, a = A), and dates with or
        without times are compared chronogically. Moreover, IP Adresses
        (IPv4 and IPv6) are expanded to be compared as expected. As said
        above, selectable custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – with
        Select, Combobox or Autocomplete type are not eligible for this
        operator.

    *   between

        The condition is met if and only if the current value of the
        instanciated conditioned by custom field
        <https://docs.bestpractical.com/rt/5.0.4/RT/ObjectCustomField.html>
        is greater than or equal to the first value setup for this condition
        and is less than or equal to the second value setup for this
        condition. That means that when this operator is selected, two
        values have to be entered. The comparison is achieved according to
        some kind of natural sort order
        <https://en.wikipedia.org/wiki/Natural_sort_order>, that is: number
        values are compared as numbers, strings are compared alphabetically,
        insensitive to case and accents (a = á, a = A), and dates with or
        without times are compared chronogically. Moreover, IP Adresses
        (IPv4 and IPv6) are expanded to be compared as expected. As said
        above, selectable custom fields
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> – with
        Select, Combobox or Autocomplete type are not eligible for this
        operator.

    As an exception, IPAddressRange custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> are not
    eligible as condition custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, since
    there is not really any sense in comparing two ranges of IP addresses.
    IPAddress custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, combined
    with between operator, should be sufficient for most cases checking
    whether an IP address is included in a range.

    Also, HTML custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> introduced
    in RT 5.0.3 works only on a static way when displaying or editing the
    Object, but not dynamically when changing the text in CKE Editor.

    If the condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> is
    selectable – with Select, Combobox or Autocomplete type – it can be
    multivalued. Then, the condition for an object is met as soon as the
    condition is met by at least one value of the instanciated conditioned
    by custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/ObjectCustomField.html> for
    this object.

    If a custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> is based
    on another (parent) custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> which is
    conditioned by, this (child) custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> will of
    course also be conditioned by (with the same condition as its parent).
    Nevertheless, there is a caveheat in display mode: the order matters!
    That is the parent custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> should
    have a lower sort order than the child custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>.

    From version 0.07, the condition can be multivalued, that is: the
    conditioned custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> can be
    displayed/edited if the condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> has one of
    these values (In other words: there is an OR bewteen the values of the
    condition). The condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> can be a
    select custom field with values defined by CustomFieldValues
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomFieldValues.html> or
    an external custom field
    <https://docs.bestpractical.com/rt/5.0.4/extending/external_custom_field
    s.html>.

    *Note that version 0.07 is a complete redesign: the API described below
    has changed; also, the way that ConditionedBy property is store has
    changed. If you upgrade from a previous version, you have to reconfigure
    the custom fields which are conditionned by.*

    Version 0.99 is also a complete redesign, with API changed, but backward
    compatibility with previously configured custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, assuming
    the default condition operator is is.

RT VERSION
    Works with RT 4.2 or greater

INSTALLATION
    perl Makefile.PL
    make
    make install
        May need root permissions

    Patch your RT
        ConditionalCustomFields requires a small patch to add necessary
        Callbacks on versions of RT superior to 4.2.3. (The patch has been
        submitted to BestPractical in order to be included in future RT
        releases, as of RT 4.4.2, some parts of the patch are already
        included, but some other parts still required to apply this patch.)

        For RT 4.2, apply the included patch:

            cd /opt/rt4 # Your location may be different
            patch -p1 < /download/dir/RT-Extension-ConditionalCustomFields/patches/4.2-add-callbacks-to-extend-customfields-capabilities.patch

        For RT 4.4.1, apply the included patch:

            cd /opt/rt4 # Your location may be different
            patch -p1 < /download/dir/RT-Extension-ConditionalCustomFields/patches/4.4.1-add-callbacks-to-extend-customfields-capabilities.patch

        For RT 4.4.2 or greater, apply the included patch:

            cd /opt/rt4 # Your location may be different
            patch -p1 < /download/dir/RT-Extension-ConditionalCustomFields/patches/4.4.2-add-callbacks-to-extend-customfields-capabilities.patch

        For RT 5.0.0 to 5.0.3, apply the included patch:

            cd /opt/rt5 # Your location may be different
            patch -p1 < /download/dir/RT-Extension-ConditionalCustomFields/patches/5.0-add-callbacks-to-extend-customfields-capabilities.patch

        For RT 5.0.4 or greater, apply the included patch:

            cd /opt/rt5 # Your location may be different
            patch -p1 < /download/dir/RT-Extension-ConditionalCustomFields/patches/5.0.4-add-callbacks-to-extend-customfields-capabilities.patch

    Edit your /opt/rt5/etc/RT_SiteConfig.pm
        If you are using RT 4.2 or greater, add this line:

            Plugin('RT::Extension::ConditionalCustomFields');

        For RT 4.0, add this line:

            Set(@Plugins, qw(RT::Extension::ConditionalCustomFields));

        or add RT::Extension::ConditionalCustomFields to your existing
        @Plugins line.

    Clear your mason cache
            rm -rf /opt/rt5/var/mason_data/obj

    Restart your webserver

CONFIGURATION
    Usually, groupings of custom fields, as defined in $CustomFieldGroupings
    configuration variable, is *not* enabled in SelfService. This is the
    case if you use RT Core. Anyway, some RT instances could have overridden
    this restriction to enable groupings of custom fields in SelfService.

    In this case, you should add to your configuration file
    (/opt/rt5/etc/RT_SiteConfig.pm) the following line, setting
    $SelfServiceCustomFieldGroupings configuration variable to a true value:

        Set($SelfServiceCustomFieldGroupings, 1);

METHODS
    ConditionalCustomFields adds a ConditionedBy property, that is a
    condition CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, an
    operator and one or more values, along with the following methods, to
    conditioned by CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> objects:

  SetConditionedBy CF, OP, VALUE
    Set the ConditionedBy property for this CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> object to
    CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> CF with
    operator set to OP and value set to VALUE. CF should be an existing
    CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> object or
    the id of an existing CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> object, or
    the name of an unambiguous existing CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> object. OP
    should be is, isn't, match, doesn't match, less than, greater than or
    between. VALUE should be a string or an anonymous array of strings (for
    selectable custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> or between
    operator). Current user should have SeeCustomField and ModifyCustomField
    rights for this conditioned by CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> and
    SeeCustomField right for the condition CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>. Returns
    (1, 'Status message') on success and (0, 'Error Message') on failure.

  ConditionedBy
    Returns the current ConditionedBy property for this conditioned by
    CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> object as
    a hash with keys CF containing the id of the condition CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, op and
    vals containing the condition operator as string, and the condition
    value as an array of strings (so we can store several values for
    selectable custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> or between
    operator, but generally the vals array includes only one string). If
    neither this conditioned by CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> nor one of
    its ancestor is conditioned by the CF condition CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, that is:
    if their ConditionedBy property is not (recursively) defined, returns
    undef. Current user should have SeeCustomField right for both this
    conditioned by CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> and the
    condition CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> which this
    CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> is
    conditioned recursively by. *"Recursively"* means that this method will
    search for a ConditionedBy property for this CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> object,
    then for the CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> this one
    is BasedOn, and so on until it finds an ancestor Category with a
    ConditionedBy property or, the CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> which is
    being looked up, is not based on any ancestor Category.

INITIALDATA
    Also, ConditionalCustomFields allows to set the ConditionedBy property
    when creating CustomFields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomFields.html> from an
    initialdata file, with one of the following syntaxes:

        @CustomFields = (
            {
                Name => 'Condition',
                Type => 'SelectSingle',
                RenderType => 'Dropdown',
                Queue => [ 'General' ],
                LookupType => 'RT::Queue-RT::Ticket',
                Values => [
                    { Name => 'Passed', SortOrder => 0 },
                    { Name => 'Failed', SortOrder => 1 },
                    { Name => 'Schrödingerized', SortOrder => 2 },
                ],
                Pattern => '(?#Mandatory).',
                DefaultValues => [ 'Failed' ],
            },
            {
                Name => 'Conditioned with cf name and value',
                Type => 'FreeformSingle',
                Queue => [ 'General' ],
                LookupType => 'RT::Queue-RT::Ticket',
                ConditionedByCF => 'Condition',
                ConditionedBy => 'Passed',
            },
            {
                Name => 'Conditioned with cf id and value',
                Type => 'FreeformSingle',
                Queue => [ 'General' ],
                LookupType => 'RT::Queue-RT::Ticket',
                ConditionedByCF => 66,
                ConditionOp => "isn't",
                ConditionedBy => 'Failed',
            },
            {
                Name => 'Conditioned with multiple values',
                Type => 'Freeform',
                MaxValues => 1,
                Queue => [ 'General' ],
                LookupType => 'RT::Queue-RT::Ticket',
                ConditionedByCF => 'Condition',
                ConditionedBy => ['Passed', 'Schrödingerized'],
            },
        );

    This examples creates a Select condition CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, named
    Condition and three conditioned by CustomFields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>.
    CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> Condition
    should have the value Passed, for CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>
    Conditioned with cf name and value to be displayed or edited.
    CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> Condition
    should not have the value Failed for CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>
    Conditioned with cf id and value to be displayed or edited. CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> Condition
    should have one of the values Passed or Schrödingerized for CustomField
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>
    Conditioned with multiple values to be displayed or edited.

    Additional fields for an element of @CustomFields are:

    ConditonedByCF
        The condition CustomField
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> that
        this new CustomField
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> should
        conditioned by. It can be either the id or the Name of a previously
        created CustomField
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>. This
        implies that the condition CustomField
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> should
        be declared before this one in the initialdata file, or it should
        already exist. When ConditionedByCF attribute is set, ConditionedBy
        field should always also be set.

    ConditonedBy
        The value as a string of the condition CustomField
        <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>
        defined by the ConditionedByCF field (which is mandatory).

    ConditonOp
        The operator as a string to use for comparison, either is, isn't,
        match, doesn't match, less than, greater than or between. This field
        is optional, defaults to is.

TEST SUITE
    ConditionalCustomFields comes with a fairly complete test suite. As for
    every RT extention
    <https://docs.bestpractical.com/rt/5.0.4/writing_extensions.html#Tests>,
    to run it, you will need a installed RT, set up in development mode
    <https://docs.bestpractical.com/rt/5.0.4/hacking.html#Test-suite>. But,
    since ConditionalCustomFields operates dynamically to show or hide
    custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, most of
    its magic happens in Javascript. Therefore, the test suite requires a
    scriptable headless browser with Javascript capabilities. So you also
    need to install PhantomJS <http://phantomjs.org/>, along with
    WWW::Mechanize::PhantomJS and Selenium::Remote::Driver.

    It should be noted that with version 0.99, the number of cases to test
    has exponentially expanded. Not only any object which can have custom
    fields (ticket <https://docs.bestpractical.com/rt/5.0.4/RT/Ticket.html>,
    queue <https://docs.bestpractical.com/rt/5.0.4/RT/Queue.html>, user
    <https://docs.bestpractical.com/rt/5.0.4/RT/User.html>, group
    <https://docs.bestpractical.com/rt/5.0.4/RT/Group.html>, article
    <https://docs.bestpractical.com/rt/5.0.4/RT/Article.html> or asset
    <https://docs.bestpractical.com/rt/5.0.4/RT/Asset.html>) should be
    tested. But also, any type of custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> (Select,
    Freeform, Text, Wikitext, Image, Binary, Combobox, Autocomplete, Date,
    DateTime and IPAddress) should be tested both for condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> and
    conditioned by custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>. And this
    both for Single and Multiple versions (when available) of each type of
    custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>. Select
    custom fields
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> should
    also be tested for each render type (Select box, List, Dropdown and also
    Chosen when the number of values is greater than ten). Adding to these
    required unitary tests, some special cases should also be included, for
    instance when a condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> is in turn
    conditioned by another condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html>, or when a
    condition custom field
    <https://docs.bestpractical.com/rt/5.0.4/RT/CustomField.html> is not
    applied to a queue
    <https://docs.bestpractical.com/rt/5.0.4/RT/Queue.html>, etc.
    Eventually, the test suite includes 1929 unitary tests and 64 test
    files. Nevertheless some special cases may have been left over, so
    you're encourage to fill a bug report, so they can be fixed.

AUTHOR
    Gérald Sédrati <gibus@easter-eggs.com>

REPOSITORY
    <https://github.com/gibus/RT-Extension-ConditionalCustomFields>

BUGS
    All bugs should be reported via email to

    bug-RT-Extension-ConditionalCustomFields@rt.cpan.org
    <mailto:bug-RT-Extension-ConditionalCustomFields@rt.cpan.org>

    or via the web at

    rt.cpan.org
    <http://rt.cpan.org/Public/Dist/Display.html?Name=RT-Extension-Condition
    alCustomFields>.

LICENSE AND COPYRIGHT
    This software is Copyright (c) 2017-2023 by Gérald Sédrati, Easter-Eggs

    This is free software, licensed under:

    The GNU General Public License, Version 3, June 2007