annotate Lib/IMPL/Web/Application/ControllerUnit.pm @ 115:5edc2ac5231c

minor fix to the serialization mechanism
author wizard
date Wed, 26 May 2010 02:32:22 +0400
parents 7b14e0122b79
children c8dfbbdd8005
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1 package IMPL::Web::Application::ControllerUnit;
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2 use strict;
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3 use base qw(IMPL::Object);
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4
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5 use IMPL::Class::Property;
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6 use IMPL::DOM::Transform::PostToDOM;
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7 use IMPL::DOM::Schema;
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8 use Class::Inspector;
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9 use File::Spec;
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10
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11 use constant {
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12 CONTROLLER_METHODS => 'controller_methods',
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13 STATE_CORRECT => 'correct',
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14 STATE_NEW => 'new',
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15 STATE_INVALID => 'invalid'
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16 };
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18 BEGIN {
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19 public property action => prop_get | owner_set;
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20 public property application => prop_get | owner_set;
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21 public property query => prop_get | owner_set;
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22 public property formData => prop_get | owner_set;
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23 public property formSchema => prop_get | owner_set;
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24 public property formErrors => prop_get | owner_set;
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25 }
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26
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27 __PACKAGE__->class_data(CONTROLLER_METHODS,{});
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28
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29 sub CTOR {
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30 my ($this,$action,$args) = @_;
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31
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32 $this->action($action);
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33 $this->application($action->application);
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34 $this->query($action->query);
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35
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36 $this->$_($args->{$_}) foreach qw(formData formSchema formErrors);
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37 }
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38
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39 sub forms {
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40 my ($self,%forms) = @_;
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41
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42 while ( my ($method,$info) = each %forms ) {
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43 die new IMPL::Exception("A method doesn't exists in the controller",$self,$method) unless $self->can($method);
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44 if ( not ref $info ) {
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45 $self->class_data(CONTROLLER_METHODS)->{$method} = {
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46 wrapper => 'FormWrapper',
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47 schema => $info
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48 };
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49 } elsif (ref $info eq 'HASH') {
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50 die new IMPL::Exception("A schema must be specified",$self,$method) unless $info->{schema};
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51
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52 $self->class_data(CONTROLLER_METHODS)->{$method} = {
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53 wrapper => 'FormWrapper',
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54 schema => $info->{schema}
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55 };
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56 } else {
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57 die new IMPL::Exception("Unsupported method information",$self,$method);
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58 }
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59 }
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60 }
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61
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62 sub transactions {
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63 my ($self,@names) = @_;
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64
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65 $self->class_data(CONTROLLER_METHODS)->{$_} = {} foreach @names;
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66 }
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67
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68 sub InvokeAction {
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69 my ($self,$method,$action) = @_;
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70
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71 if (my $methodInfo = $self->class_data(CONTROLLER_METHODS)->{$method}) {
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72 if (my $wrapper = $methodInfo->{wrapper}) {
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73 return $self->$wrapper($method,$action,$methodInfo);
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74 } else {
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75 return $self->TransactionWrapper($method,$action,$methodInfo);
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76 }
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77 } else {
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78 die new IMPL::InvalidOperationException("Invalid method call",$self,$method);
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79 }
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80 }
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81
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82 sub TransactionWrapper {
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83 my ($self,$method,$action,$methodInfo) = @_;
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84
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85 my $unit = $self->new($action);
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86 return $unit->$method();
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87 }
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88
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89 sub FormWrapper {
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90 my ($self,$method,$action,$methodInfo) = @_;
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91
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92 my $schema = $self->loadSchema($methodInfo->{schema});
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93
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94 my $process = $action->query->param('process') || 0;
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95 my $form = $methodInfo->{form}
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96 || $action->query->param('form')
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97 || $schema->selectSingleNode('ComplexNode')->name
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98 or die new IMPL::Exception('No situable form name could be determined',$self,$method);
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99
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100 my %result;
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101
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102 my $transform = IMPL::DOM::Transform::PostToDOM->new(
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103 undef,
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104 $schema,
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105 $form
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106 );
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107
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108 $result{formSchema} = $schema;
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109 $result{formData} = $transform->Transform($self->query);
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110
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111 if ($process) {
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112 $result{formErrors} = $transform->Errors->as_list;
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113 if ($transform->Errors->Count) {
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114 $result{state} = STATE_INVALID;
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115 } else {
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116 $result{state} = STATE_CORRECT;
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117 my $unit = $self->new($action,\%result);
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118 $result{result} = $unit->method();
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119 }
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120 } else {
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121 $result{state} = STATE_NEW;
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122 }
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123
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124 return \%result;
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125 }
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126
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127 sub loadSchema {
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128 my ($self,$name) = @_;
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129
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130 my ($vol,$dir,$file) = File::Spec->splitpath( Class::Inspector->resolved_filename(ref $self || $self) );
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131
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132 return IMPL::DOM::Schema->LoadSchema(File::Spec->catfile($vol,$dir,$name));
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133 }
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134
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135 1;
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136
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137 __END__
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138
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139 =pod
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140
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141 =head1 NAME
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142
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143 C<IMPL::Web::Application::ControllerUnit> - базовый класс для обработчика транзакций в модели контроллера.
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144
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145 =head1 DESCRIPTION
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146
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147 Классы, наследуемые от данного класса называется пакетом транзакций. Часть методов в таком классе
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148 объявляются как транзакции при помощи методов C<transaction>, C<form>.
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149
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150 Перед выполнением транзакции создается экземпляр объекта, в рамках которого будет выполнена транзакция.
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151 Для этого вызывается метод C<InvokeAction($method,$action)>, который создает/восстанавливает контекст
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152 транзакции.
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153
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154 Транзакции на данный момент делятся на простые и формы.
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155
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156 =head2 Простые транзакции
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157
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158 Простые транзакции получаю только запрос, без предварительной обработки, и возвращенный результат напрямую
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159 передается пользователю.
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160
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161 =head2 Формы
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162
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163 При использовании форм запрос предварительно обрабатывается, для получения DOM документа с данными формы.
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164 Для постороенния DOM документа используется схема. При этом становятся доступны дополнительные свойства
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165 C<formData>, C<formSchema>, C<formErrors>.
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166
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167 Результат выполнения транзакции не возвращается напрямую пользователю, а включается в общий ответ, который
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168 выглядит следующим образом
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169
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170 =begin code
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171
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172 {
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173 state => '{ new | correct | invalid }',
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174 result => $transactionResult,
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175 formData => $formDOM,
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176 formSchema => $formSchema,
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177 formErrors => @errors
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178 }
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179
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180 =end code
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181
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182 =over
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183
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184 =item C<state>
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185
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186 Состояние верификации формы.
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187
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188 =over
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189
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190 =item C<new>
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191
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192 Первоначальное содержимое формы, оно может быть некорректным, но это нормально.
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193 В данном состоянии транзакция обычно не выполняется.
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194
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195 =item C<correct>
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196
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197 Данные формы корректны, транзакция выполнена, и ее результат доступен через поле C<result>
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198
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199 =item C<invalid>
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200
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201 Содержимое формы не прошло верификацию, ошибки доступны через поле C<formErrors>. Транзакция
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202 не выполнялась.
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203
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204 =back
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205
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206 =item C<result>
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207
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208 Результат выполнения транзакции, если конечно таковая выполнялась.
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209
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210 =item C<formData>
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211
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212 ДОМ документ с данными формами. Документ существует всегда, не зависимо от его корректности,
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213 может быть использован для построения формы, уже заполненную параметрами.
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214
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215 =item C<formSchema>
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216
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217 Схема данных формы, может использоваться для построения динамических форм.
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218
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219 =item C<formErrors>
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220
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221 Ошибки верификации данных, если таковые были
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222
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223 =back
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224
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225 =head1 MEMBERS
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226
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227 =over
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228
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229 =item C<[get] application>
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230
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231 =item C<[get] query>
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232
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233 =item C<[get] response>
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234
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235 =item C<[get] formData>
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236
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237 =item C<[get] formSchema>
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238
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239 =item C<[get] formErrors>
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240
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241 =item C<InvokeAction($method,$action)>
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242
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243 Конструирует контекст выполнения транзакции, может быть переопределен для конструирования контекста по
112
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244 своим правилам.
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245
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246 =item C<TransactionWrapper($method,$action,$methodInfo)>
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247
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248 Обертка для конструирования простых транзакций, может быть переопределен для конструирования контекста по
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249 своим правилам.
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250
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251 =item C<FormWrapper($method,$action,$methodInfo)>
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252
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253 Обертка для конструирования форм, может быть переопределен для конструирования контекста по
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254 своим правилам.
111
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255
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256 =back
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257
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258 =head1 EXAMPLE
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259
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260 =begin code
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261
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262 package MyBooksUnit;
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263 use strict;
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264 use base qw(IMPL::Web::Application::ControllerUnit);
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265
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266 __PACKAGE__->PassThroughArgs;
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267
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268 __PACKAGE__->transactions(qw(
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269 find
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270 info
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271 ));
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272 __PACKAGE__->forms(
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273 create => 'books.create.xml'
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274 );
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275
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276 sub find {
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277 my ($this) = @_;
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278
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279 return $this->application->dataSource->resultset('Books')->find({author => $this->query->param('author')});
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280 }
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281
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282 sub info {
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283 my ($this) = @_;
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284
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285 return $this->application->dataSource->resultset('Books')->find({id => $this->query->param('id')});
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286 }
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287
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288 sub create {
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289 my ($this) = @_;
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290
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291 my %book = map {
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292 $_ => $this->formData->selectSingleNode($_)->nodeValue
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293 } qw(author_id title year ISBN);
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294
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295 return $this->application->datasource->resultset('Books')->create(\%book);
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296 }
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297
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298 =end code
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299
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300 =cut