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407
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1 package IMPL::Resources::StringMap;
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2 use strict;
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3
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4 use IMPL::Const qw(:prop);
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5 use IMPL::declare {
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6 require => {
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7 Exception => 'IMPL::Exception',
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8 IOException => '-IMPL::IOException',
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9 ArgException => '-IMPL::InvalidArgumentException'
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10 },
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11 base => [
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12 'IMPL::Object' => '@_'
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13 ],
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14 props => [
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15 _data => PROP_RW,
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16 _parent => PROP_RW
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17 ]
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18 };
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19
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20 sub CTOR {
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21 my ($this,$data,$parent) = @_;
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22
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23 die ArgException->new( data => 'A hash reference is required' )
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24 unless ref($data) eq 'HASH';
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25
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26 die ArgException->new( data => 'A hash must contain either scalars or subs')
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27 if grep ref($_) && ref($_) ne 'CODE', values %$data;
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28
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29 $this->_data($data);
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30 $this->_parent($parent);
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31 }
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32
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33 sub GetString {
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34 my ($this,$id,$args) = @_;
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35
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36 if(my $format = $this->_data->{$id}) {
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37 return ref($format) eq 'CODE' ? &$format($this,$args || {}) : $this->FormatString($format,$args);
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38 } else {
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39 return $this->_parent? $this->_parent->GetString($id,$args) : "[ $id ]";
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40 }
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41
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42 }
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43
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44 sub AddFormat {
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45 my ($this,$id,$format) = @_;
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46
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47 die ArgException->new( id => 'A format id is required' )
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48 unless $id;
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49
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50 die ArgException->new( format => 'A format must be a scalar or a sub' )
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51 if ref($format) and ref($format) ne 'CODE';
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52
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53 $this->_data->{$id} = $format;
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54 }
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55
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56 sub FormatString {
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57 my ($self,$text,$args) = @_;
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58
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59 $args ||= {};
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60 $text ||= '';
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61
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62 $text =~ s/%(\w+(?:\.\w+)*)%/$self->GetValue($args,$1,"\[$1\]")/ge;
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63
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64 return $text;
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65
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66 }
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67
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68 sub GetValue {
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69 my ($self,$obj,$path,$default) = @_;
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70
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71 foreach my $chunk (split /\./,$path) {
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72 return $default unless $obj;
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73 if (ref $obj eq 'HASH') {
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74 $obj = $obj->{$chunk};
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75 } else {
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76 $obj = $self->Resolve($obj,$chunk);
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77 }
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78 }
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79 return $obj||'<undef>';
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80 }
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81
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82 sub Resolve {
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83 my ($self,$obj,$prop) = @_;
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84
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85 return eval { $obj->$prop() };
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86 }
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87
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88 1;
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89
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90 __END__
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91
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92 =pod
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93
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94 =head1 NAME
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95
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96 C<IMPL::Web::Resources::StringMap>
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97
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98 =head1 SYNOPSIS
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99
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100 =begin code
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101
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102 use IMPL::require {
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103 StringMap => 'IMPL::Resources::StringMap'
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104 };
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105
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106 my $data = {
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107 TitleLabel => 'Search results',
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108 ViewLabel => 'View %name%', # same as sub { $_[0]->Format('View %name%',$_[1]) }
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109 ResultsCountLabel => sub {
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110 my ($self,$args) = @_;
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111
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112 $args ||= {};
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113
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114 if (not $args->{count}) {
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115 return "No items found";
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116 } elsif($args->{count} == 1) {
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117 return "Found one item";
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118 } else {
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119 return $self->Format('Found %count% items', $args);
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120 }
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121 }
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122 }
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123
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124 my $def = StringMap->new({
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125 ResultsCountLabel => 'Found %count% items'
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126 });
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127
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128 my $map = StringMap->new($data, $def);
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129
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130 print $map->GetString('TitleLabel');
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131 print $map->GetString(ResultsCountLabel => { count => 0 }); # will print "No items found"
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132
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133
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134 =end code
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135
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136 =head1 DESCRIPTION
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137
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138 =head1 MEMBERS
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139
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140 =cut |
