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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 | #predicates are autmagically generated for lazy and non-required attrs |
18 | has message => (is => 'rw', isa => 'Str', clearer => 'clear_message'); |
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19 | |
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20 | after clear_value => sub { |
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21 | my $self = shift; |
22 | $self->clear_message if $self->has_message; |
23 | $self->needs_sync(1); |
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24 | }; |
25 | |
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26 | implements adopt_value => as { |
27 | my ($self) = @_; |
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28 | $self->clear_message if $self->has_message; |
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29 | $self->needs_sync(1); # if $self->has_attribute; |
30 | }; |
31 | |
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32 | implements can_sync_to_action => as { |
33 | my $self = shift; |
34 | return 1 unless $self->needs_sync; |
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35 | my $attr = $self->attribute; |
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36 | |
37 | if ($self->has_value) { |
38 | my $value = $self->value; |
39 | if (my $tc = $attr->type_constraint) { |
40 | $value = $tc->coercion->coerce($value) if ($tc->has_coercion); |
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41 | if (defined (my $error = $tc->validate($value))) { |
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42 | $self->message($error); |
43 | return; |
44 | } |
45 | } |
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46 | } else { |
47 | return if $attr->is_required; |
48 | } |
49 | return 1; |
50 | }; |
51 | |
52 | implements sync_to_action => as { |
53 | my ($self) = @_; |
54 | return unless $self->needs_sync; |
55 | return unless $self->can_sync_to_action; |
56 | |
57 | my $attr = $self->attribute; |
58 | |
59 | if ($self->has_value) { |
60 | my $value = $self->value; |
61 | if (my $tc = $attr->type_constraint) { |
62 | #this will go away when we have moose dbic. until then though... |
63 | $value = $tc->coercion->coerce($value) if ($tc->has_coercion); |
64 | } |
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65 | my $writer = $attr->get_write_method; |
66 | confess "No writer for attribute" unless defined($writer); |
67 | $self->model->$writer($value); |
68 | } else { |
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69 | my $predicate = $attr->get_predicate_method; |
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70 | confess "No predicate for attribute" unless defined($predicate); |
71 | if ($self->model->$predicate) { |
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72 | my $clearer = $attr->get_clearer_method; |
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73 | confess "${predicate} returned true but no clearer for attribute" |
74 | unless defined($clearer); |
75 | $self->model->$clearer; |
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76 | } |
77 | } |
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78 | $self->needs_sync(0); |
79 | }; |
80 | |
81 | implements sync_from_action => as { |
82 | my ($self) = @_; |
83 | return unless !$self->needs_sync; # && $self->has_attribute; |
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84 | if( !$self->has_message ){ |
85 | if(my $error = $self->model->error_for($self->attribute) ){ |
86 | $self->message( $error ); |
87 | } |
88 | } |
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89 | }; |
90 | |
91 | around accept_events => sub { ('value', shift->(@_)) }; |
92 | |
93 | }; |
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94 | |
95 | 1; |
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96 | |
97 | =head1 NAME |
98 | |
99 | Reaction::UI::ViewPort::Role::Actions |
100 | |
101 | =head1 DESCRIPTION |
102 | |
103 | A role to ease attaching actions to L<Reaction::InterfaceModel::Object>s |
104 | |
105 | =head1 ATTRIBUTES |
106 | |
107 | =head2 needs_sync |
108 | |
109 | =head2 message |
110 | |
111 | =head2 model |
112 | |
113 | =head2 attribute |
114 | |
115 | =head2 value |
116 | |
117 | =head1 METHODS |
118 | |
119 | =head2 accept_events |
120 | |
121 | =head2 sync_from_action |
122 | |
123 | =head2 sync_to_action |
124 | |
125 | =head2 adopt_value |
126 | |
127 | =head1 AUTHORS |
128 | |
129 | See L<Reaction::Class> for authors. |
130 | |
131 | =head1 LICENSE |
132 | |
133 | See L<Reaction::Class> for the license. |
134 | |
135 | =cut |