annotate lib/IMPL/DOM/Transform/QueryToDOM.pm @ 418:3f38dabaf5cc ref20150831

sync
author cin
date Mon, 28 Dec 2015 15:11:35 +0300
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children
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407
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1 package IMPL::DOM::Transform::QueryToDOM;
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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 OutOfRangeException => '-IMPL::OutOfRangeException'
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8 },
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9 base => [
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10 'IMPL::DOM::Transform::ObjectToDOM' => '@_'
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11 ],
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12 props => [
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13 prefix => PROP_RO,
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14 delimiter => PROP_RO
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15 ]
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16 };
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17
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18 our $MAX_INDEX = 1024;
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19
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20 sub CTOR {
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21 my ($this) = @_;
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22
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23 $this->templates->{'CGI'} = 'TransformCGI';
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24 $this->templates->{'IMPL::Web::Application::Action'} = 'TransformAction';
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25
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26 $this->delimiter('[.]');
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27 $this->prefix('');
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28 }
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29
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30 # inflate simple properties
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31 sub TransformPlain {
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32 my ($this,$data) = @_;
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33
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34 $this->currentNode->nodeProperty( rawValue => $data );
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35 $this->currentNode->nodeValue( $data );
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36 return $this->currentNode;
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37 }
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38
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39 # do not store complex data as node values
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40 sub StoreObject {
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41 my ($this,$node,$data) = @_;
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42
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43 return $node;
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44 }
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45
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46 #TODO: support a.b[0][1].c[1]
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47
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48 sub TransformCGI {
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49 my ($this,$query) = @_;
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50
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51 my $data={};
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52
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53 my $prefix = $this->prefix;
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54 my $delim = $this->delimiter;
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55
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56 foreach my $param (grep index($_,$prefix) >= 0 , $query->param()) {
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57
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58 my @value = grep length($_), $query->param($param) or next;
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59
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60 my @parts = split /$delim/,$param;
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61
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62 my $node = $data;
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63 while ( my $part = shift @parts ) {
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64 if (my ($name,$index) = ($part =~ m/^(\w+)(?:\[(\d+)\])?$/) ) {
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65 if (@parts) {
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66 if(defined $index) {
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67 $this->ValidateIndex($index);
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68 $node = ($node->{$name}[$index] ||= {});
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69 } else {
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70 $node = ($node->{$name} ||= {});
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71 }
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72 } else {
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73 if(defined $index) {
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74 $this->ValidateIndex($index);
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75 $node->{$name}[$index] = (@value == 1 ? $value[0] : \@value);
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76 } else {
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77 $node->{$name} = (@value == 1 ? $value[0] : \@value);
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78 }
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79 }
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80 }
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81 }
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82 }
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83
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84 return $this->Transform($data);
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85 }
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86
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87 sub ValidateIndex {
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88 my ($this,$index) = @_;
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89
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90 die OutOfRangeException->new()
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91 unless $index >= 0 and $index <= $MAX_INDEX;
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92 }
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93
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94 sub TransformAction {
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95 my ($this,$action) = @_;
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96
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97 return $this->Transform($action->isJson ? $action->jsonData : $action->query);
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98 }
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99
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100 1;
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101
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102 __END__
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103
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104 =pod
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105
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106 =head1 NAME
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107
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108 C<IMPL::DOM::Transform::QueryToDOM> - преобразование CGI запроса в DOM документ.
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109
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110 =head1 SYNOPSIS
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111
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112 =begin code
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113
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114 use CGI();
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115 use IMPL::require {
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116 Schema => 'IMPL::DOM::Schema',
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117 Config => 'IMPL::Config',
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118 QueryToDOM => 'IMPL::DOM::Transform::QueryToDOM'
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119 }
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120
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121 my $q = CGI->new();
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122
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123 my $schema = Schema->LoadSchema(Config->AppBase('schemas','person.xml'));
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124 my $transorm = QueryToDOM->new('edit', $schema);
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125
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126 my $form = $transform->Transform($q);
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127
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128 my @errors;
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129
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130 push @errors, $transform->buildErrors;
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131 push @errors, $schema->Validate($doc);
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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 Наследует C<IMPL::DOM::Transform::ObjectToDOM>. Добавляет метод
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139 C<TransformCGI> который применятеся к объектам типа C<CGI> (и производных).
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140
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141 Запрос C<CGI> сначала приводится к хешу, затем полученный хеш преобразуется
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142 в DOM документ при помощи вызова метода C<Transform>.
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143
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144 Для этого выбираются параметры запроса, затем, имя каждого параметра
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145 рассматривается в виде пути к свойству, создается структура из хешей и массивов
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146 в которую по указанному пути кладется значение.
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147
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148 Если параметр имеет несколько значений, значит свойство является массивом.
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149
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150 Также изменено поведение некоторых методов преобразования.
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151
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152 =over
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153
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154 =item * C<TransformPlain($value)>
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155
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156 Преобразование для простого значения свойства. Посокльку в запросе передаются
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157 строковые значения, а схема документа может предполпгать другие типы, при
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158 преобразовании значения параметра из запроса к значению узла используется
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159 метод C<< $this->inflateNodeValue($value) >>, также помимо значения
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160 C<< $this->currentNode->nodeValue >> задается атрибут
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161 C<< $this->currentNode->nodeProperty( rawValue => $value) >>, для того, чтобы
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162 была возможность получить оригинальное значение параметра запроса (например,
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163 в случае когда его формат был не верным и C<nodeValue> будет C<undef>).
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164
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165 =item * C<StoreObject($node,$object)>
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166
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167 Данный метод вызывается если текущий узел (переданный в параметре C<$node>)
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168 предполагает простое значение, однако в запросе для него было передано сложное
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169 содержимое. Данная реализация просто игнорирует переданный объект C<$object>
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170 и возвращает C<$node> без изменений.
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171
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172 =back
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173
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174 =head1 MEMBERS
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175
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176 =head2 C<[get]delimiter>
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177
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178 REGEX. Разделитель свойств в имени параметра, по-умолчанию C<'[.]'>
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179
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180 =head2 C<[get]prefix>
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181
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182 Строка, префикс имен параметров, которые участвуют в формировании документа.
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183 По-умолчанию пусто.
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184
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185 =cut