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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 | |
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34 | sub can_sync_to_action { |
35 | my $self = shift; |
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36 | |
37 | # if field is already sync'ed, it can be sync'ed again |
38 | # this will make sync_to_action no-op if needs_sync is 0 |
39 | return 1 unless $self->needs_sync; |
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40 | my $attr = $self->attribute; |
41 | |
42 | if ($self->has_value) { |
43 | my $value = $self->value; |
44 | if (my $tc = $attr->type_constraint) { |
45 | $value = $tc->coercion->coerce($value) if ($tc->has_coercion); |
46 | if (defined (my $error = $tc->validate($value))) { |
47 | $self->message($error); |
48 | return; |
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49 | } |
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50 | } |
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51 | } else { |
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52 | if( $self->model->attribute_is_required($attr) ){ |
53 | if(my $error = $self->model->error_for($self->attribute) ){ |
54 | $self->message( $error ); |
55 | } |
56 | return; |
57 | } |
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58 | } |
59 | return 1; |
60 | }; |
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61 | |
62 | |
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63 | sub sync_to_action { |
64 | my ($self) = @_; |
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65 | |
66 | # don't sync if we're already synced |
67 | return unless $self->needs_sync; |
68 | |
69 | # if we got here, needs_sync is 1 |
70 | # can_sync_to_action will do coercion checks, etc. |
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71 | return unless $self->can_sync_to_action; |
72 | |
73 | my $attr = $self->attribute; |
74 | |
75 | if ($self->has_value) { |
76 | my $value = $self->value; |
77 | if (my $tc = $attr->type_constraint) { |
78 | #this will go away when we have moose dbic. until then though... |
79 | $value = $tc->coercion->coerce($value) if ($tc->has_coercion); |
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80 | } |
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81 | my $writer = $attr->get_write_method; |
82 | confess "No writer for attribute" unless defined($writer); |
83 | $self->model->$writer($value); |
84 | } else { |
85 | my $predicate = $attr->get_predicate_method; |
86 | confess "No predicate for attribute" unless defined($predicate); |
87 | if ($self->model->$predicate) { |
88 | my $clearer = $attr->get_clearer_method; |
89 | confess "${predicate} returned true but no clearer for attribute" |
90 | unless defined($clearer); |
91 | $self->model->$clearer; |
92 | } |
93 | } |
94 | $self->needs_sync(0); |
95 | }; |
96 | sub sync_from_action { |
97 | my ($self) = @_; |
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98 | return if $self->needs_sync; |
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99 | if( !$self->has_message ){ |
100 | if(my $error = $self->model->error_for($self->attribute) ){ |
101 | $self->message( $error ); |
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102 | } |
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103 | } |
104 | }; |
105 | |
106 | around accept_events => sub { ('value', shift->(@_)) }; |
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107 | |
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108 | |
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109 | |
110 | 1; |
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111 | |
112 | =head1 NAME |
113 | |
114 | Reaction::UI::ViewPort::Role::Actions |
115 | |
116 | =head1 DESCRIPTION |
117 | |
118 | A role to ease attaching actions to L<Reaction::InterfaceModel::Object>s |
119 | |
120 | =head1 ATTRIBUTES |
121 | |
122 | =head2 needs_sync |
123 | |
124 | =head2 message |
125 | |
126 | =head2 model |
127 | |
128 | =head2 attribute |
129 | |
130 | =head2 value |
131 | |
132 | =head1 METHODS |
133 | |
134 | =head2 accept_events |
135 | |
136 | =head2 sync_from_action |
137 | |
138 | =head2 sync_to_action |
139 | |
140 | =head2 adopt_value |
141 | |
142 | =head1 AUTHORS |
143 | |
144 | See L<Reaction::Class> for authors. |
145 | |
146 | =head1 LICENSE |
147 | |
148 | See L<Reaction::Class> for the license. |
149 | |
150 | =cut |