Mercurial > pub > Impl
annotate Lib/IMPL/Web/Application/ControllerUnit.pm @ 158:a9f4ba4783eb
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| author | wizard |
|---|---|
| date | Tue, 02 Nov 2010 20:17:22 +0300 |
| parents | e6447ad85cb4 |
| children | 3f09584bf189 |
| rev | line source |
|---|---|
| 133 | 1 use strict; |
| 110 | 2 package IMPL::Web::Application::ControllerUnit; |
| 3 use base qw(IMPL::Object); | |
| 4 | |
| 5 use IMPL::Class::Property; | |
| 112 | 6 use IMPL::DOM::Transform::PostToDOM; |
| 7 use IMPL::DOM::Schema; | |
| 113 | 8 use Class::Inspector; |
| 9 use File::Spec; | |
| 133 | 10 use Sub::Name; |
| 112 | 11 |
| 12 use constant { | |
| 13 CONTROLLER_METHODS => 'controller_methods', | |
| 14 STATE_CORRECT => 'correct', | |
| 15 STATE_NEW => 'new', | |
| 16 STATE_INVALID => 'invalid' | |
| 17 }; | |
| 110 | 18 |
| 19 BEGIN { | |
| 20 public property action => prop_get | owner_set; | |
| 21 public property application => prop_get | owner_set; | |
| 22 public property query => prop_get | owner_set; | |
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23 public property response => prop_get | owner_set; |
| 111 | 24 public property formData => prop_get | owner_set; |
| 25 public property formSchema => prop_get | owner_set; | |
| 26 public property formErrors => prop_get | owner_set; | |
| 110 | 27 } |
| 28 | |
| 133 | 29 my %publicProps = map {$_->Name , 1} __PACKAGE__->get_meta(typeof IMPL::Class::PropertyInfo); |
| 30 | |
| 113 | 31 __PACKAGE__->class_data(CONTROLLER_METHODS,{}); |
| 32 | |
| 110 | 33 sub CTOR { |
| 112 | 34 my ($this,$action,$args) = @_; |
| 110 | 35 |
| 36 $this->action($action); | |
| 37 $this->application($action->application); | |
| 38 $this->query($action->query); | |
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39 $this->response($action->response); |
| 112 | 40 |
| 41 $this->$_($args->{$_}) foreach qw(formData formSchema formErrors); | |
| 42 } | |
| 43 | |
| 134 | 44 sub unitNamespace() { |
| 45 "" | |
| 46 } | |
| 47 | |
| 48 sub transactions { | |
| 49 my ($self,%methods) = @_; | |
| 50 | |
| 51 while (my ($method,$info) = each %methods) { | |
| 52 if ($info and ref $info ne 'HASH') { | |
| 53 warn "Bad transaction $method description"; | |
| 54 $info = {}; | |
| 55 } | |
| 56 | |
| 57 $info->{wrapper} = 'TransactionWrapper'; | |
| 58 $self->class_data(CONTROLLER_METHODS)->{$method} = $info; | |
| 59 } | |
| 60 } | |
| 61 | |
| 112 | 62 sub forms { |
| 63 my ($self,%forms) = @_; | |
| 64 | |
| 65 while ( my ($method,$info) = each %forms ) { | |
| 66 die new IMPL::Exception("A method doesn't exists in the controller",$self,$method) unless $self->can($method); | |
| 67 if ( not ref $info ) { | |
| 68 $self->class_data(CONTROLLER_METHODS)->{$method} = { | |
| 69 wrapper => 'FormWrapper', | |
| 70 schema => $info | |
| 71 }; | |
| 72 } elsif (ref $info eq 'HASH') { | |
| 73 die new IMPL::Exception("A schema must be specified",$self,$method) unless $info->{schema}; | |
| 74 | |
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75 $info->{wrapper} = 'FormWrapper'; |
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76 |
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77 $self->class_data(CONTROLLER_METHODS)->{$method} = $info; |
| 112 | 78 } else { |
| 79 die new IMPL::Exception("Unsupported method information",$self,$method); | |
| 80 } | |
| 81 } | |
| 82 } | |
| 83 | |
| 110 | 84 sub InvokeAction { |
| 85 my ($self,$method,$action) = @_; | |
| 86 | |
| 112 | 87 if (my $methodInfo = $self->class_data(CONTROLLER_METHODS)->{$method}) { |
| 88 if (my $wrapper = $methodInfo->{wrapper}) { | |
| 89 return $self->$wrapper($method,$action,$methodInfo); | |
| 90 } else { | |
| 91 return $self->TransactionWrapper($method,$action,$methodInfo); | |
| 92 } | |
| 110 | 93 } else { |
| 94 die new IMPL::InvalidOperationException("Invalid method call",$self,$method); | |
| 95 } | |
| 111 | 96 } |
| 97 | |
| 133 | 98 sub MakeParams { |
| 99 my ($this,$methodInfo) = @_; | |
| 100 | |
| 101 my $params; | |
| 102 if ($params = $methodInfo->{parameters} and ref $params eq 'ARRAY') { | |
| 146 | 103 return map $this->ResolveParam($_,$methodInfo->{inflate}{$_}), @$params; |
| 133 | 104 } |
| 105 return(); | |
| 106 } | |
| 107 | |
| 108 sub ResolveParam { | |
| 146 | 109 my ($this,$param,$inflate) = @_; |
| 133 | 110 |
| 111 if ( $param =~ /^::(\w+)$/ and $publicProps{$1}) { | |
| 112 return $this->$1(); | |
| 113 } else { | |
| 146 | 114 my $value; |
| 115 if ( my $rx = $inflate->{rx} ) { | |
| 116 $value = $this->action->param($param,$rx); | |
| 117 } else { | |
| 118 $value = $this->query->param($param); | |
| 119 } | |
| 120 | |
| 121 if (my $method = $inflate->{method}) { | |
| 122 $value = $this->$method($value); | |
| 123 } | |
| 124 return $value; | |
| 133 | 125 } |
| 126 } | |
| 127 | |
| 112 | 128 sub TransactionWrapper { |
| 129 my ($self,$method,$action,$methodInfo) = @_; | |
| 130 | |
| 131 my $unit = $self->new($action); | |
| 133 | 132 return $unit->$method($unit->MakeParams($methodInfo)); |
| 112 | 133 } |
| 134 | |
| 135 sub FormWrapper { | |
| 113 | 136 my ($self,$method,$action,$methodInfo) = @_; |
| 137 | |
| 138 my $schema = $self->loadSchema($methodInfo->{schema}); | |
| 139 | |
| 140 my $process = $action->query->param('process') || 0; | |
| 141 my $form = $methodInfo->{form} | |
| 142 || $action->query->param('form') | |
| 143 || $schema->selectSingleNode('ComplexNode')->name | |
| 144 or die new IMPL::Exception('No situable form name could be determined',$self,$method); | |
| 112 | 145 |
| 113 | 146 my %result; |
| 112 | 147 |
| 113 | 148 my $transform = IMPL::DOM::Transform::PostToDOM->new( |
| 149 undef, | |
| 150 $schema, | |
| 151 $form | |
| 152 ); | |
| 153 | |
| 138 | 154 $result{formName} = $form; |
| 113 | 155 $result{formSchema} = $schema; |
| 126 | 156 $result{formData} = $transform->Transform($action->query); |
| 157 | |
| 112 | 158 |
| 113 | 159 if ($process) { |
| 160 $result{formErrors} = $transform->Errors->as_list; | |
| 161 if ($transform->Errors->Count) { | |
| 162 $result{state} = STATE_INVALID; | |
| 163 } else { | |
| 164 $result{state} = STATE_CORRECT; | |
| 165 my $unit = $self->new($action,\%result); | |
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166 |
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167 eval { |
| 133 | 168 $result{result} = $unit->$method($unit->MakeParams($methodInfo)); |
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169 }; |
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170 if (my $err = $@) { |
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171 $result{state} = STATE_INVALID; |
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172 if (eval { $err->isa(typeof IMPL::WrongDataException) } ) { |
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173 $result{formErrors} = $err->Args; |
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174 } else { |
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175 die $err; |
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176 } |
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177 } |
| 113 | 178 } |
| 179 } else { | |
| 180 $result{state} = STATE_NEW; | |
| 181 } | |
| 112 | 182 |
| 113 | 183 return \%result; |
| 184 } | |
| 185 | |
| 186 sub loadSchema { | |
| 187 my ($self,$name) = @_; | |
| 188 | |
| 126 | 189 if (-f $name) { |
| 190 return IMPL::DOM::Schema->LoadSchema($name); | |
| 191 } else { | |
| 192 my ($vol,$dir,$file) = File::Spec->splitpath( Class::Inspector->resolved_filename(ref $self || $self) ); | |
| 193 | |
| 194 return IMPL::DOM::Schema->LoadSchema(File::Spec->catfile($vol,$dir,$name)); | |
| 195 } | |
| 112 | 196 } |
| 197 | |
| 134 | 198 sub discover { |
| 199 my ($this) = @_; | |
| 200 | |
| 201 my $methods = $this->class_data(CONTROLLER_METHODS); | |
| 202 | |
| 203 my $namespace = $this->unitNamespace; | |
| 204 (my $module = typeof $this) =~ s/^$namespace//; | |
| 133 | 205 |
| 134 | 206 my %smd = ( |
| 207 module => [grep $_, split /::/, $module ], | |
| 208 ); | |
| 133 | 209 |
| 134 | 210 while (my ($method,$info) = each %$methods) { |
| 211 my %methodInfo = ( | |
| 212 name => $method | |
| 213 ); | |
| 214 $methodInfo{parameters} = $info->{parameters} if $info->{parameters}; | |
| 215 push @{$smd{methods}},\%methodInfo; | |
| 216 } | |
| 217 return \%smd; | |
| 133 | 218 } |
| 219 | |
| 134 | 220 __PACKAGE__->transactions( |
| 221 discover => undef | |
| 222 ); | |
| 133 | 223 |
| 111 | 224 1; |
| 225 | |
| 226 __END__ | |
| 227 | |
| 228 =pod | |
| 229 | |
| 230 =head1 NAME | |
| 231 | |
| 232 C<IMPL::Web::Application::ControllerUnit> - базовый класс для обработчика транзакций в модели контроллера. | |
| 233 | |
| 234 =head1 DESCRIPTION | |
| 235 | |
| 113 | 236 Классы, наследуемые от данного класса называется пакетом транзакций. Часть методов в таком классе |
| 237 объявляются как транзакции при помощи методов C<transaction>, C<form>. | |
| 111 | 238 |
| 239 Перед выполнением транзакции создается экземпляр объекта, в рамках которого будет выполнена транзакция. | |
| 240 Для этого вызывается метод C<InvokeAction($method,$action)>, который создает/восстанавливает контекст | |
| 241 транзакции. | |
| 242 | |
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243 Транзакции на данный момент делятся на простые и формы. Различные типы транзакций выполняются при помощи |
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244 различных оберток (C<TransactionWrapper> и C<FormWrapper>). Каждая обертка отвечает за конструирование |
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245 экземпляра объекта и вызов метода для выполнения транзакции, а также за возврат результата выполнения. |
| 111 | 246 |
| 247 =head2 Простые транзакции | |
| 248 | |
| 249 Простые транзакции получаю только запрос, без предварительной обработки, и возвращенный результат напрямую | |
| 250 передается пользователю. | |
| 251 | |
| 252 =head2 Формы | |
| 253 | |
| 254 При использовании форм запрос предварительно обрабатывается, для получения DOM документа с данными формы. | |
| 255 Для постороенния DOM документа используется схема. При этом становятся доступны дополнительные свойства | |
| 256 C<formData>, C<formSchema>, C<formErrors>. | |
| 257 | |
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258 Результат выполнения транзакции не возвращается наверх напрямую, а включается в структуру, которая |
| 111 | 259 выглядит следующим образом |
| 260 | |
| 261 =begin code | |
| 262 | |
| 263 { | |
| 264 state => '{ new | correct | invalid }', | |
| 265 result => $transactionResult, | |
| 266 formData => $formDOM, | |
| 267 formSchema => $formSchema, | |
| 268 formErrors => @errors | |
| 269 } | |
| 270 | |
| 271 =end code | |
| 272 | |
| 273 =over | |
| 274 | |
| 275 =item C<state> | |
| 276 | |
| 277 Состояние верификации формы. | |
| 278 | |
| 279 =over | |
| 280 | |
| 281 =item C<new> | |
| 282 | |
| 283 Первоначальное содержимое формы, оно может быть некорректным, но это нормально. | |
| 284 В данном состоянии транзакция обычно не выполняется. | |
| 285 | |
| 286 =item C<correct> | |
| 287 | |
| 288 Данные формы корректны, транзакция выполнена, и ее результат доступен через поле C<result> | |
| 289 | |
| 290 =item C<invalid> | |
| 291 | |
| 292 Содержимое формы не прошло верификацию, ошибки доступны через поле C<formErrors>. Транзакция | |
| 293 не выполнялась. | |
| 294 | |
| 295 =back | |
| 296 | |
| 297 =item C<result> | |
| 298 | |
| 299 Результат выполнения транзакции, если конечно таковая выполнялась. | |
| 300 | |
| 301 =item C<formData> | |
| 302 | |
| 303 ДОМ документ с данными формами. Документ существует всегда, не зависимо от его корректности, | |
| 304 может быть использован для построения формы, уже заполненную параметрами. | |
| 305 | |
| 306 =item C<formSchema> | |
| 307 | |
| 308 Схема данных формы, может использоваться для построения динамических форм. | |
| 309 | |
| 310 =item C<formErrors> | |
| 311 | |
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312 Ссылка на массив с ошибками при проверки формы. |
| 111 | 313 |
| 314 =back | |
| 315 | |
| 316 =head1 MEMBERS | |
| 317 | |
| 318 =over | |
| 319 | |
| 320 =item C<[get] application> | |
| 321 | |
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322 Объект приложения, которое обрабатывает запрос. |
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323 |
| 111 | 324 =item C<[get] query> |
| 325 | |
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326 Текущий запрос. |
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327 |
| 111 | 328 =item C<[get] response> |
| 329 | |
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330 Текущий ответ. |
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331 |
| 111 | 332 =item C<[get] formData> |
| 333 | |
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334 C<IMPL::DOM::Document> документ с данныим, если данный запрос является формой. |
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335 |
| 111 | 336 =item C<[get] formSchema> |
| 337 | |
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338 C<IMPL::DOM::Schema> документ со схемой формы данного запроса. |
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339 |
| 111 | 340 =item C<[get] formErrors> |
| 341 | |
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342 Ошибки верификации данных, если таковые были. Обычно при наличии ошибок в форме, транзакция |
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343 не выполняется, а эти ошибки передаются в ответ. |
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344 |
| 111 | 345 =item C<InvokeAction($method,$action)> |
| 346 | |
| 347 Конструирует контекст выполнения транзакции, может быть переопределен для конструирования контекста по | |
| 112 | 348 своим правилам. |
| 349 | |
| 350 =item C<TransactionWrapper($method,$action,$methodInfo)> | |
| 351 | |
| 352 Обертка для конструирования простых транзакций, может быть переопределен для конструирования контекста по | |
| 353 своим правилам. | |
| 354 | |
| 355 =item C<FormWrapper($method,$action,$methodInfo)> | |
| 356 | |
| 357 Обертка для конструирования форм, может быть переопределен для конструирования контекста по | |
| 358 своим правилам. | |
| 111 | 359 |
| 134 | 360 =item C<discover()> |
| 361 | |
| 362 Метод, опубликованный для вызова контроллером, возвращает описание методов в формате C<Simple Module Definition>. | |
| 363 | |
| 364 =begin code | |
| 365 | |
| 366 # SMD structure | |
| 367 { | |
| 368 module => ['Foo','Bar'], | |
| 369 methods => [ | |
| 370 { | |
| 371 name => 'search', | |
| 372 parameters => ['text','limit'] #optional | |
| 373 } | |
| 374 ] | |
| 375 } | |
| 376 | |
| 377 =end code | |
| 378 | |
| 111 | 379 =back |
| 380 | |
| 381 =head1 EXAMPLE | |
| 382 | |
| 383 =begin code | |
| 384 | |
| 385 package MyBooksUnit; | |
| 386 use strict; | |
| 387 use base qw(IMPL::Web::Application::ControllerUnit); | |
| 388 | |
| 389 __PACKAGE__->PassThroughArgs; | |
| 390 | |
| 134 | 391 sub unitDataClass { 'My::Books' } |
| 392 | |
| 393 __PACKAGE__->transactions( | |
| 394 find => { | |
| 395 parameters => [qw(author)] | |
| 396 }, | |
| 397 info => { | |
| 398 parameters => [qw(id)] | |
| 399 } | |
| 400 ); | |
| 111 | 401 __PACKAGE__->forms( |
| 402 create => 'books.create.xml' | |
| 403 ); | |
| 404 | |
| 405 sub find { | |
| 134 | 406 my ($this,$author) = @_; |
| 111 | 407 |
| 134 | 408 return $this->ds->find({author => $author}); |
| 111 | 409 } |
| 410 | |
| 411 sub info { | |
| 134 | 412 my ($this,$id) = @_; |
| 111 | 413 |
| 134 | 414 return $this->ds->find({id => $id}); |
| 111 | 415 } |
| 416 | |
| 417 sub create { | |
| 418 my ($this) = @_; | |
| 419 | |
| 420 my %book = map { | |
| 134 | 421 $_->nodeName, $_->nodeValue |
| 422 } $this->formData->selectNodes([qw(author_id title year ISBN)]); | |
| 111 | 423 |
| 134 | 424 return $this->ds->create(\%book); |
| 111 | 425 } |
| 426 | |
| 427 =end code | |
| 428 | |
| 429 =cut |