Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like DocumentGenerateCommand often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use DocumentGenerateCommand, and based on these observations, apply Extract Interface, too.
1 | <?php |
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23 | class DocumentGenerateCommand extends AbstractManagerAwareCommand |
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24 | { |
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25 | /** |
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26 | * @var QuestionHelper |
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27 | */ |
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28 | private $questionHelper; |
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29 | |||
30 | /** |
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31 | * @var string[] |
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32 | */ |
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33 | private $propertyAnnotations; |
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34 | |||
35 | /** |
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36 | * {@inheritdoc} |
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37 | */ |
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38 | protected function configure() |
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39 | { |
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40 | parent::configure(); |
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41 | |||
42 | $this |
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43 | ->setName('ongr:es:document:generate') |
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44 | ->setDescription('Generates a new Elasticsearch document inside a bundle'); |
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45 | } |
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46 | |||
47 | /** |
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48 | * {@inheritdoc} |
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49 | */ |
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50 | protected function execute(InputInterface $input, OutputInterface $output) |
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51 | { |
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52 | if ($input->hasParameterOption(['--no-interaction', '-n'])) { |
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53 | throw $this->getException('No interaction mode is not allowed!'); |
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54 | } |
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55 | } |
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56 | |||
57 | /** |
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58 | * {@inheritdoc} |
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59 | */ |
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60 | protected function interact(InputInterface $input, OutputInterface $output) |
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61 | { |
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62 | /** @var FormatterHelper $formatter */ |
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63 | $formatter = $this->getHelperSet()->get('formatter'); |
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64 | $this->questionHelper = new QuestionHelper(); |
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65 | |||
66 | $output->writeln( |
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67 | [ |
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68 | '', |
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69 | $formatter->formatBlock('Welcome to the Elasticsearch Bundle document generator', 'bg=blue', true), |
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70 | '', |
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71 | 'This command helps you generate ONGRElasticsearchBundle documents.', |
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72 | '', |
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73 | 'First, you need to give the document name you want to generate.', |
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74 | 'You must use the shortcut notation like <comment>AcmeDemoBundle:Post</comment>.', |
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75 | '', |
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76 | ] |
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77 | ); |
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78 | |||
79 | /** @var Kernel $kernel */ |
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80 | $kernel = $this->getContainer()->get('kernel'); |
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81 | $bundleNames = array_keys($kernel->getBundles()); |
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82 | |||
83 | while (true) { |
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84 | $document = $this->questionHelper->ask( |
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85 | $input, |
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86 | $output, |
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87 | $this->getQuestion('The Document shortcut name', null, [$this, 'validateDocumentName'], $bundleNames) |
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88 | ); |
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89 | |||
90 | list($bundle, $document) = $this->parseShortcutNotation($document); |
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91 | |||
92 | if (in_array(strtolower($document), $this->getReservedKeywords())) { |
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93 | $output->writeln($this->getException('"%s" is a reserved word.', [$document])->getMessage()); |
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94 | continue; |
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95 | } |
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96 | |||
97 | try { |
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98 | if (!file_exists( |
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99 | $kernel->getBundle($bundle)->getPath() . '/Document/' . str_replace('\\', '/', $document) . '.php' |
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100 | )) { |
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101 | break; |
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102 | } |
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103 | |||
104 | $output->writeln( |
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105 | $this->getException('Document "%s:%s" already exists.', [$bundle, $document])->getMessage() |
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106 | ); |
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107 | } catch (\Exception $e) { |
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108 | $output->writeln($this->getException('Bundle "%s" does not exist.', [$bundle])->getMessage()); |
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109 | } |
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110 | } |
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111 | |||
112 | $output->writeln($this->getOptionsLabel($this->getDocumentAnnotations(), 'Available types')); |
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113 | $annotation = $this->questionHelper->ask( |
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114 | $input, |
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115 | $output, |
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116 | $this->getQuestion( |
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117 | 'Document type', |
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118 | 'document', |
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119 | [$this, 'validateDocumentAnnotation'], |
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120 | $this->getDocumentAnnotations() |
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121 | ) |
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122 | ); |
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123 | |||
124 | $this->propertyAnnotations = ['embedded', 'property']; |
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125 | $documentType = lcfirst($document); |
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126 | |||
127 | if ($annotation == 'document') { |
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128 | $this->propertyAnnotations = ['embedded', 'id', 'parentDocument', 'property', 'ttl']; |
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129 | $documentType = $this->questionHelper->ask( |
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130 | $input, |
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131 | $output, |
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132 | $this->getQuestion( |
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133 | "\n" . 'Elasticsearch Document name', |
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134 | lcfirst($document), |
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135 | [$this, 'validateFieldName'] |
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136 | ) |
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137 | ); |
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138 | } |
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139 | |||
140 | $properties = []; |
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141 | $output->writeln(['', $formatter->formatBlock('New Document Property?', 'bg=blue;fg=white', true)]); |
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142 | |||
143 | while (true) { |
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144 | $property = []; |
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145 | $question = $this->getQuestion( |
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146 | 'Property name [<comment>press <info><return></info> to stop</comment>]', |
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147 | false |
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148 | ); |
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149 | |||
150 | if (!$field = $this->questionHelper->ask($input, $output, $question)) { |
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151 | break; |
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152 | } |
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153 | |||
154 | foreach ($properties as $previousProperty) { |
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155 | if ($previousProperty['field_name'] == $field) { |
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156 | $output->writeln($this->getException('Duplicate field name "%s"', [$field])->getMessage()); |
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157 | continue(2); |
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158 | } |
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159 | } |
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160 | |||
161 | try { |
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162 | $this->validateFieldName($field); |
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163 | } catch (\InvalidArgumentException $e) { |
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164 | $output->writeln($e->getMessage()); |
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165 | continue; |
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166 | } |
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167 | |||
168 | $output->writeln($this->getOptionsLabel($this->propertyAnnotations, 'Available annotations')); |
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169 | $property['annotation'] = $this->questionHelper->ask( |
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170 | $input, |
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171 | $output, |
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172 | $this->getQuestion( |
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173 | 'Property meta field', |
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174 | 'property', |
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175 | [$this, 'validatePropertyAnnotation'], |
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176 | $this->propertyAnnotations |
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177 | ) |
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178 | ); |
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179 | |||
180 | $property['field_name'] = $property['property_name'] = $field; |
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181 | |||
182 | switch ($property['annotation']) { |
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183 | case 'embedded': |
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184 | $property['property_name'] = $this->askForPropertyName($input, $output, $property['field_name']); |
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185 | $property['property_class'] = $this->askForPropertyClass($input, $output); |
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186 | |||
187 | $question = new ConfirmationQuestion("\n<info>Multiple</info> [<comment>no</comment>]: ", false); |
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188 | $question->setAutocompleterValues(['yes', 'no']); |
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189 | $property['property_multiple'] = $this->questionHelper->ask($input, $output, $question); |
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190 | |||
191 | $property['property_options'] = $this->askForPropertyOptions($input, $output); |
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192 | break; |
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193 | View Code Duplication | case 'parentDocument': |
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194 | if (!$this->isUniqueAnnotation($properties, $property['annotation'])) { |
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195 | $output->writeln( |
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196 | $this |
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197 | ->getException('Only one "%s" field can be added', [$property['annotation']]) |
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198 | ->getMessage() |
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199 | ); |
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200 | continue(2); |
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201 | } |
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202 | $property['property_class'] = $this->askForPropertyClass($input, $output); |
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203 | break; |
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204 | case 'property': |
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205 | $property['property_name'] = $this->askForPropertyName($input, $output, $property['field_name']); |
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206 | |||
207 | $output->writeln($this->getOptionsLabel($this->getPropertyTypes(), 'Available types')); |
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208 | $property['property_type'] = $this->questionHelper->ask( |
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209 | $input, |
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210 | $output, |
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211 | $this->getQuestion( |
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212 | 'Property type', |
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213 | 'string', |
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214 | [$this, 'validatePropertyType'], |
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215 | $this->getPropertyTypes() |
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216 | ) |
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217 | ); |
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218 | |||
219 | $property['property_options'] = $this->askForPropertyOptions($input, $output); |
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220 | break; |
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221 | View Code Duplication | case 'ttl': |
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222 | if (!$this->isUniqueAnnotation($properties, $property['annotation'])) { |
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223 | $output->writeln( |
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224 | $this |
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225 | ->getException('Only one "%s" field can be added', [$property['annotation']]) |
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226 | ->getMessage() |
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227 | ); |
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228 | continue(2); |
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229 | } |
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230 | $property['property_default'] = $this->questionHelper->ask( |
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231 | $input, |
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232 | $output, |
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233 | $this->getQuestion("\n" . 'Default time to live') |
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234 | ); |
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235 | break; |
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236 | case 'id': |
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237 | if (!$this->isUniqueAnnotation($properties, $property['annotation'])) { |
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238 | $output->writeln( |
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239 | $this |
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240 | ->getException('Only one "%s" field can be added', [$property['annotation']]) |
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241 | ->getMessage() |
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242 | ); |
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243 | continue(2); |
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244 | } |
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245 | break; |
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246 | } |
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247 | |||
248 | $properties[] = $property; |
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249 | $output->writeln(['', $formatter->formatBlock('New Document Property', 'bg=blue;fg=white', true)]); |
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250 | } |
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251 | |||
252 | $this->getContainer()->get('es.generate')->generate( |
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253 | $this->getContainer()->get('kernel')->getBundle($bundle), |
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254 | $document, |
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255 | $annotation, |
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256 | $documentType, |
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257 | $properties |
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258 | ); |
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259 | } |
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260 | |||
261 | /** |
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262 | * @param array $properties |
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263 | * @param string $annotation |
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264 | * |
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265 | * @return string |
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266 | */ |
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267 | private function isUniqueAnnotation($properties, $annotation) |
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277 | |||
278 | /** |
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279 | * Asks for property name |
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280 | * |
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281 | * @param InputInterface $input |
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282 | * @param OutputInterface $output |
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283 | * @param string $default |
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284 | * |
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285 | * @return string |
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286 | */ |
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287 | private function askForPropertyName(InputInterface $input, OutputInterface $output, $default = null) |
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288 | { |
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289 | return $this->questionHelper->ask( |
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290 | $input, |
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291 | $output, |
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292 | $this->getQuestion("\n" . 'Property name in Elasticsearch', $default, [$this, 'validateFieldName']) |
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293 | ); |
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294 | } |
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295 | |||
296 | /** |
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297 | * Asks for property options |
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298 | * |
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299 | * @param InputInterface $input |
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300 | * @param OutputInterface $output |
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301 | * |
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302 | * @return string |
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303 | */ |
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304 | private function askForPropertyOptions(InputInterface $input, OutputInterface $output) |
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305 | { |
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306 | $output->writeln( |
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307 | "\n" |
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308 | . '<info>Enter property options, for example <comment>"index"="not_analyzed"</comment>' |
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309 | . ' allows mapper to index this field, so it is searchable, but value will be not analyzed.</info>' |
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310 | ); |
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311 | |||
312 | return $this->questionHelper->ask( |
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313 | $input, |
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314 | $output, |
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315 | $this->getQuestion( |
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316 | 'Property options [<comment>press <info><return></info> to stop</comment>]', |
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317 | false, |
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318 | null, |
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319 | ['"index"="not_analyzed"', '"analyzer"="standard"'] |
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320 | ) |
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321 | ); |
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322 | } |
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323 | |||
324 | /** |
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325 | * Asks for property class |
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326 | * |
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327 | * @param InputInterface $input |
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328 | * @param OutputInterface $output |
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329 | * |
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330 | * @return string |
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331 | */ |
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332 | private function askForPropertyClass(InputInterface $input, OutputInterface $output) |
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333 | { |
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334 | return $this->questionHelper->ask( |
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335 | $input, |
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336 | $output, |
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337 | $this->getQuestion( |
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338 | "\n" . 'Property class', |
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339 | null, |
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340 | [$this, 'validatePropertyClass'], |
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341 | array_merge($this->getDocumentClasses(), array_keys($this->getContainer()->get('kernel')->getBundles())) |
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342 | ) |
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343 | ); |
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344 | } |
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345 | |||
346 | /** |
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347 | * Returns available document classes |
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348 | * |
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349 | * @return array |
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350 | */ |
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351 | private function getDocumentClasses() |
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352 | { |
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353 | /** @var MetadataCollector $metadataCollector */ |
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354 | $metadataCollector = $this->getContainer()->get('es.metadata_collector'); |
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355 | $classes = []; |
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356 | |||
357 | foreach ($this->getContainer()->getParameter('es.managers') as $manager) { |
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358 | $documents = $metadataCollector->getMappings($manager['mappings']); |
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359 | foreach ($documents as $document) { |
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360 | $classes[] = sprintf('%s:%s', $document['bundle'], $document['class']); |
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361 | } |
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362 | } |
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363 | |||
364 | return $classes; |
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365 | } |
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366 | |||
367 | /** |
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368 | * Parses shortcut notation |
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369 | * |
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370 | * @param string $shortcut |
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371 | * |
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372 | * @return string[] |
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373 | * @throws \InvalidArgumentException |
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374 | */ |
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375 | private function parseShortcutNotation($shortcut) |
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376 | { |
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377 | $shortcut = str_replace('/', '\\', $shortcut); |
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378 | |||
379 | if (false === $pos = strpos($shortcut, ':')) { |
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380 | throw $this->getException( |
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381 | 'The document name isn\'t valid ("%s" given, expecting something like AcmeBundle:Post)', |
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382 | [$shortcut] |
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383 | ); |
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384 | } |
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385 | |||
386 | return [substr($shortcut, 0, $pos), substr($shortcut, $pos + 1)]; |
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387 | } |
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388 | |||
389 | /** |
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390 | * Validates property class |
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391 | * |
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392 | * @param string $input |
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393 | * |
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394 | * @return string |
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395 | * @throws \InvalidArgumentException |
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396 | */ |
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397 | public function validatePropertyClass($input) |
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398 | { |
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399 | list($bundle, $document) = $this->parseShortcutNotation($input); |
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400 | |||
401 | try { |
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402 | $bundlePath = $this->getContainer()->get('kernel')->getBundle($bundle)->getPath(); |
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403 | } catch (\Exception $e) { |
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404 | throw $this->getException('Bundle "%s" does not exist.', [$bundle]); |
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405 | } |
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406 | |||
407 | if (!file_exists($bundlePath . '/Document/' . str_replace('\\', '/', $document) . '.php')) { |
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408 | throw $this->getException('Document "%s:%s" does not exist.', [$bundle, $document]); |
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409 | } |
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410 | |||
411 | return $input; |
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412 | } |
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413 | |||
414 | /** |
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415 | * Performs basic checks in document name |
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416 | * |
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417 | * @param string $document |
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418 | * |
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419 | * @return string |
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420 | * @throws \InvalidArgumentException |
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421 | */ |
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422 | public function validateDocumentName($document) |
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423 | { |
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424 | if (!preg_match('{^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*:[a-zA-Z0-9_\x7f-\xff\\\/]+$}', $document)) { |
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425 | throw $this->getException( |
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426 | 'The document name isn\'t valid ("%s" given, expecting something like AcmeBundle:Post)', |
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427 | [$document] |
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428 | ); |
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429 | } |
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430 | |||
431 | return $document; |
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432 | } |
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433 | |||
434 | /** |
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435 | * Validates field name |
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436 | * |
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437 | * @param string $field |
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438 | * |
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439 | * @return string |
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440 | * @throws \InvalidArgumentException |
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441 | */ |
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442 | public function validateFieldName($field) |
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443 | { |
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444 | if (!$field || $field != lcfirst(preg_replace('/[^a-zA-Z]+/', '', $field))) { |
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445 | throw $this->getException( |
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446 | 'The parameter isn\'t valid ("%s" given, expecting camelcase separated words)', |
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447 | [$field] |
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448 | ); |
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449 | } |
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450 | |||
451 | if (in_array(strtolower($field), $this->getReservedKeywords())) { |
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452 | throw $this->getException('"%s" is a reserved word.', [$field]); |
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453 | } |
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454 | |||
455 | return $field; |
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456 | } |
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457 | |||
458 | /** |
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459 | * Validates property type |
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460 | * |
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461 | * @param string $type |
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462 | * |
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463 | * @return string |
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464 | * @throws \InvalidArgumentException |
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465 | */ |
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466 | View Code Duplication | public function validatePropertyType($type) |
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467 | { |
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468 | if (!in_array($type, $this->getPropertyTypes())) { |
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469 | throw $this->getException( |
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470 | 'The property type isn\'t valid ("%s" given, expecting one of following: %s)', |
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471 | [$type, implode(', ', $this->getPropertyTypes())] |
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472 | ); |
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473 | } |
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474 | |||
475 | return $type; |
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476 | } |
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477 | |||
478 | /** |
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479 | * Validates document annotation |
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480 | * |
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481 | * @param string $annotation |
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482 | * |
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483 | * @return string |
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484 | * @throws \InvalidArgumentException |
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485 | */ |
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486 | View Code Duplication | public function validateDocumentAnnotation($annotation) |
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487 | { |
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488 | if (!in_array($annotation, $this->getDocumentAnnotations())) { |
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489 | throw $this->getException( |
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490 | 'The document annotation isn\'t valid ("%s" given, expecting one of following: %s)', |
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491 | [$annotation, implode(', ', $this->getDocumentAnnotations())] |
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492 | ); |
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493 | } |
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494 | |||
495 | return $annotation; |
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496 | } |
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497 | |||
498 | /** |
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499 | * Validates property annotation |
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500 | * |
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501 | * @param string $annotation |
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502 | * |
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503 | * @return string |
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504 | * @throws \InvalidArgumentException |
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505 | */ |
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506 | View Code Duplication | public function validatePropertyAnnotation($annotation) |
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507 | { |
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508 | if (!in_array($annotation, $this->propertyAnnotations)) { |
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509 | throw $this->getException( |
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510 | 'The property annotation isn\'t valid ("%s" given, expecting one of following: %s)', |
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511 | [$annotation, implode(', ', $this->propertyAnnotations)] |
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512 | ); |
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513 | } |
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514 | |||
515 | return $annotation; |
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516 | } |
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517 | |||
518 | /** |
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519 | * Returns formatted question |
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520 | * |
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521 | * @param string $question |
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522 | * @param mixed $default |
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523 | * @param callable|null $validator |
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524 | * @param array|null $values |
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525 | * |
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526 | * @return Question |
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527 | */ |
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528 | private function getQuestion($question, $default = null, callable $validator = null, array $values = null) |
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529 | { |
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530 | $question = new Question( |
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531 | sprintf('<info>%s</info>%s: ', $question, $default ? sprintf(' [<comment>%s</comment>]', $default) : ''), |
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532 | $default |
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533 | ); |
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534 | |||
535 | $question |
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536 | ->setValidator($validator) |
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537 | ->setAutocompleterValues($values); |
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538 | |||
539 | return $question; |
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540 | } |
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541 | |||
542 | /** |
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543 | * Returns options label |
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544 | * |
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545 | * @param array $options |
||
546 | * @param string $suffix |
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547 | * |
||
548 | * @return string[] |
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549 | */ |
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550 | private function getOptionsLabel(array $options, $suffix) |
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551 | { |
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552 | $label = sprintf('<info>%s:</info> ', $suffix); |
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553 | |||
554 | foreach ($options as &$option) { |
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555 | $option = sprintf('<comment>%s</comment>', $option); |
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556 | } |
||
557 | |||
558 | return ['', $label . implode(', ', $options) . '.']; |
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559 | } |
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560 | |||
561 | /** |
||
562 | * Returns formatted exception |
||
563 | * |
||
564 | * @param string $format |
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565 | * @param array $args |
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566 | * |
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567 | * @return \InvalidArgumentException |
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568 | */ |
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569 | private function getException($format, $args = []) |
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570 | { |
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571 | /** @var FormatterHelper $formatter */ |
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572 | $formatter = $this->getHelperSet()->get('formatter'); |
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573 | return new \InvalidArgumentException($formatter->formatBlock(vsprintf($format, $args), 'bg=red', true)); |
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574 | } |
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575 | |||
576 | /** |
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577 | * Returns available property types |
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578 | * |
||
579 | * @return array |
||
580 | */ |
||
581 | private function getPropertyTypes() |
||
582 | { |
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583 | $reflection = new \ReflectionClass('ONGR\ElasticsearchBundle\Annotation\Property'); |
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584 | |||
585 | return $this |
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586 | ->getContainer() |
||
587 | ->get('annotations.cached_reader') |
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588 | ->getPropertyAnnotation($reflection->getProperty('type'), 'Doctrine\Common\Annotations\Annotation\Enum') |
||
589 | ->value; |
||
590 | } |
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591 | |||
592 | /** |
||
593 | * Returns document annotations |
||
594 | * |
||
595 | * @return string[] |
||
596 | */ |
||
597 | private function getDocumentAnnotations() |
||
601 | |||
602 | /** |
||
603 | * Returns reserved keywords |
||
604 | * |
||
605 | * @return string[] |
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606 | */ |
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607 | private function getReservedKeywords() |
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678 | } |
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679 |
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: