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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 | |
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8 | use namespace::clean -except => [ qw(meta) ]; |
9 | |
10 | has model => (is => 'ro', isa => Action, required => 1); |
11 | has attribute => (is => 'ro', isa => ParameterAttribute, required => 1); |
12 | |
13 | has value => ( |
14 | is => 'rw', lazy_build => 1, trigger_adopt('value'), |
15 | clearer => 'clear_value', |
16 | ); |
17 | has needs_sync => (is => 'rw', isa => 'Int', default => 0); |
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18 | |
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19 | has message => (is => 'rw', isa => 'Str', clearer => 'clear_message'); |
20 | |
21 | after clear_value => sub { |
22 | my $self = shift; |
23 | $self->clear_message if $self->has_message; |
24 | $self->needs_sync(1); |
25 | }; |
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26 | |
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27 | sub adopt_value { |
28 | my ($self) = @_; |
29 | $self->clear_message if $self->has_message; |
30 | $self->needs_sync(1); # if $self->has_attribute; |
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31 | } |
32 | |
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33 | sub can_sync_to_action { |
34 | my $self = shift; |
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35 | return unless $self->needs_sync; |
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36 | my $attr = $self->attribute; |
37 | |
38 | if ($self->has_value) { |
39 | my $value = $self->value; |
40 | if (my $tc = $attr->type_constraint) { |
41 | $value = $tc->coercion->coerce($value) if ($tc->has_coercion); |
42 | if (defined (my $error = $tc->validate($value))) { |
43 | $self->message($error); |
44 | return; |
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45 | } |
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46 | } |
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47 | } else { |
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48 | return if $self->model->attribute_is_required($attr); |
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49 | } |
50 | return 1; |
51 | }; |
52 | sub sync_to_action { |
53 | my ($self) = @_; |
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54 | return unless $self->can_sync_to_action; |
55 | |
56 | my $attr = $self->attribute; |
57 | |
58 | if ($self->has_value) { |
59 | my $value = $self->value; |
60 | if (my $tc = $attr->type_constraint) { |
61 | #this will go away when we have moose dbic. until then though... |
62 | $value = $tc->coercion->coerce($value) if ($tc->has_coercion); |
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63 | } |
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64 | my $writer = $attr->get_write_method; |
65 | confess "No writer for attribute" unless defined($writer); |
66 | $self->model->$writer($value); |
67 | } else { |
68 | my $predicate = $attr->get_predicate_method; |
69 | confess "No predicate for attribute" unless defined($predicate); |
70 | if ($self->model->$predicate) { |
71 | my $clearer = $attr->get_clearer_method; |
72 | confess "${predicate} returned true but no clearer for attribute" |
73 | unless defined($clearer); |
74 | $self->model->$clearer; |
75 | } |
76 | } |
77 | $self->needs_sync(0); |
78 | }; |
79 | sub sync_from_action { |
80 | my ($self) = @_; |
81 | return unless !$self->needs_sync; # && $self->has_attribute; |
82 | if( !$self->has_message ){ |
83 | if(my $error = $self->model->error_for($self->attribute) ){ |
84 | $self->message( $error ); |
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85 | } |
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86 | } |
87 | }; |
88 | |
89 | around accept_events => sub { ('value', shift->(@_)) }; |
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90 | |
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91 | |
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92 | |
93 | 1; |
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94 | |
95 | =head1 NAME |
96 | |
97 | Reaction::UI::ViewPort::Role::Actions |
98 | |
99 | =head1 DESCRIPTION |
100 | |
101 | A role to ease attaching actions to L<Reaction::InterfaceModel::Object>s |
102 | |
103 | =head1 ATTRIBUTES |
104 | |
105 | =head2 needs_sync |
106 | |
107 | =head2 message |
108 | |
109 | =head2 model |
110 | |
111 | =head2 attribute |
112 | |
113 | =head2 value |
114 | |
115 | =head1 METHODS |
116 | |
117 | =head2 accept_events |
118 | |
119 | =head2 sync_from_action |
120 | |
121 | =head2 sync_to_action |
122 | |
123 | =head2 adopt_value |
124 | |
125 | =head1 AUTHORS |
126 | |
127 | See L<Reaction::Class> for authors. |
128 | |
129 | =head1 LICENSE |
130 | |
131 | See L<Reaction::Class> for the license. |
132 | |
133 | =cut |