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1 | package Reaction::UI::ViewPort::Field::Role::Mutable; |
2 | |
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3 | use Reaction::Role; |
4 | |
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5 | use aliased 'Reaction::InterfaceModel::Action'; |
6 | use aliased 'Reaction::Meta::InterfaceModel::Action::ParameterAttribute'; |
7 | |
8 | role Mutable, which { |
9 | has model => (is => 'ro', isa => Action, required => 1); |
10 | has attribute => (is => 'ro', isa => ParameterAttribute, required => 1); |
11 | |
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12 | has value => ( |
13 | is => 'rw', lazy_build => 1, trigger_adopt('value'), |
14 | clearer => 'clear_value', |
15 | ); |
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16 | has needs_sync => (is => 'rw', isa => 'Int', default => 0); |
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17 | has message => (is => 'rw', isa => 'Str'); |
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18 | |
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19 | after clear_value => sub { |
20 | shift->needs_sync(1); |
21 | }; |
22 | |
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23 | implements adopt_value => as { |
24 | my ($self) = @_; |
25 | $self->needs_sync(1); # if $self->has_attribute; |
26 | }; |
27 | |
28 | implements sync_to_action => as { |
29 | my ($self) = @_; |
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30 | return unless $self->needs_sync; |
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31 | my $attr = $self->attribute; |
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32 | |
33 | if ($self->has_value) { |
34 | my $value = $self->value; |
35 | if (my $tc = $attr->type_constraint) { |
36 | $value = $tc->coercion->coerce($value) if ($tc->has_coercion); |
37 | #my $error = $tc->validate($self->value); # should we be checking against $value? |
38 | my $error = $tc->validate($value); |
39 | if (defined $error) { |
40 | $self->message($error); |
41 | return; |
42 | } |
43 | } |
44 | my $writer = $attr->get_write_method; |
45 | confess "No writer for attribute" unless defined($writer); |
46 | $self->model->$writer($value); |
47 | } else { |
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48 | my $predicate = $attr->predicate; |
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49 | confess "No predicate for attribute" unless defined($predicate); |
50 | if ($self->model->$predicate) { |
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51 | my $clearer = $attr->clearer; |
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52 | confess "${predicate} returned true but no clearer for attribute" |
53 | unless defined($clearer); |
54 | $self->model->$clearer; |
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55 | } |
56 | } |
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57 | $self->needs_sync(0); |
58 | }; |
59 | |
60 | implements sync_from_action => as { |
61 | my ($self) = @_; |
62 | return unless !$self->needs_sync; # && $self->has_attribute; |
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63 | $self->message($self->model->error_for($self->attribute) || ''); |
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64 | }; |
65 | |
66 | around accept_events => sub { ('value', shift->(@_)) }; |
67 | |
68 | }; |
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69 | |
70 | 1; |
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71 | |
72 | =head1 NAME |
73 | |
74 | Reaction::UI::ViewPort::Role::Actions |
75 | |
76 | =head1 DESCRIPTION |
77 | |
78 | A role to ease attaching actions to L<Reaction::InterfaceModel::Object>s |
79 | |
80 | =head1 ATTRIBUTES |
81 | |
82 | =head2 needs_sync |
83 | |
84 | =head2 message |
85 | |
86 | =head2 model |
87 | |
88 | =head2 attribute |
89 | |
90 | =head2 value |
91 | |
92 | =head1 METHODS |
93 | |
94 | =head2 accept_events |
95 | |
96 | =head2 sync_from_action |
97 | |
98 | =head2 sync_to_action |
99 | |
100 | =head2 adopt_value |
101 | |
102 | =head1 AUTHORS |
103 | |
104 | See L<Reaction::Class> for authors. |
105 | |
106 | =head1 LICENSE |
107 | |
108 | See L<Reaction::Class> for the license. |
109 | |
110 | =cut |