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:
| 1 | <?php |
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| 26 | class PluginCommandHandler |
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| 27 | { |
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| 28 | /** |
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| 29 | * @var RootModuleFileManager |
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| 30 | */ |
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| 31 | private $manager; |
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| 32 | |||
| 33 | /** |
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| 34 | * Creates the handler. |
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| 35 | * |
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| 36 | * @param RootModuleFileManager $manager The root module file manager |
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| 37 | */ |
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| 38 | 6 | public function __construct(RootModuleFileManager $manager) |
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| 39 | { |
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| 40 | 6 | $this->manager = $manager; |
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| 41 | 6 | } |
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| 42 | |||
| 43 | /** |
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| 44 | * Handles the "puli plugin --list" command. |
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| 45 | * |
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| 46 | * @param Args $args The console arguments |
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| 47 | * @param IO $io The I/O |
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| 48 | * |
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| 49 | * @return int The status code |
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| 50 | */ |
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| 51 | 2 | public function handleList(Args $args, IO $io) |
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| 52 | { |
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| 53 | 2 | $pluginClasses = $this->manager->getPluginClasses(); |
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| 54 | |||
| 55 | 2 | if (!$pluginClasses) { |
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| 56 | 1 | $io->writeLine('No plugin classes. Use "puli plugin --install <class>" to install a plugin class.'); |
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| 57 | |||
| 58 | 1 | return 0; |
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| 59 | } |
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| 60 | |||
| 61 | 1 | foreach ($pluginClasses as $pluginClass) { |
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| 62 | 1 | $io->writeLine(sprintf('<c1>%s</c1>', $pluginClass)); |
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| 63 | } |
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| 64 | |||
| 65 | 1 | return 0; |
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| 66 | } |
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| 67 | |||
| 68 | /** |
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| 69 | * Handles the "puli plugin --install" command. |
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| 70 | * |
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| 71 | * @param Args $args The console arguments |
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| 72 | * |
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| 73 | * @return int The status code |
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| 74 | */ |
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| 75 | 2 | View Code Duplication | public function handleInstall(Args $args) |
| 76 | { |
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| 77 | 2 | $pluginClass = $args->getArgument('class'); |
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| 78 | |||
| 79 | 2 | if ($this->manager->hasPluginClass($pluginClass)) { |
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| 80 | 1 | throw new RuntimeException(sprintf( |
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| 81 | 1 | 'The plugin class "%s" is already installed.', |
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| 82 | $pluginClass |
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| 83 | )); |
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| 84 | } |
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| 85 | |||
| 86 | 1 | $this->manager->addPluginClass($pluginClass); |
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| 87 | |||
| 88 | 1 | return 0; |
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| 89 | } |
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| 90 | |||
| 91 | /** |
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| 92 | * Handles the "puli plugin --remove" command. |
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| 93 | * |
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| 94 | * @param Args $args The console arguments |
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| 95 | * |
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| 96 | * @return int The status code |
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| 97 | */ |
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| 98 | 2 | View Code Duplication | public function handleDelete(Args $args) |
| 113 | } |
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| 114 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.