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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\Console\Input;
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13
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14 use Symfony\Component\Console\Exception\InvalidArgumentException;
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15 use Symfony\Component\Console\Exception\LogicException;
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16
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17 /**
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18 * Represents a command line argument.
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19 *
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20 * @author Fabien Potencier <fabien@symfony.com>
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21 */
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22 class InputArgument
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23 {
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24 const REQUIRED = 1;
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25 const OPTIONAL = 2;
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26 const IS_ARRAY = 4;
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27
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28 private $name;
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29 private $mode;
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30 private $default;
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31 private $description;
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32
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33 /**
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34 * @param string $name The argument name
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35 * @param int|null $mode The argument mode: self::REQUIRED or self::OPTIONAL
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36 * @param string $description A description text
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37 * @param string|string[]|null $default The default value (for self::OPTIONAL mode only)
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38 *
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39 * @throws InvalidArgumentException When argument mode is not valid
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40 */
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41 public function __construct($name, $mode = null, $description = '', $default = null)
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42 {
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43 if (null === $mode) {
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44 $mode = self::OPTIONAL;
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45 } elseif (!\is_int($mode) || $mode > 7 || $mode < 1) {
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46 throw new InvalidArgumentException(sprintf('Argument mode "%s" is not valid.', $mode));
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47 }
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48
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49 $this->name = $name;
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50 $this->mode = $mode;
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51 $this->description = $description;
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52
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53 $this->setDefault($default);
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54 }
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55
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56 /**
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57 * Returns the argument name.
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58 *
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59 * @return string The argument name
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60 */
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61 public function getName()
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62 {
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63 return $this->name;
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64 }
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65
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66 /**
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67 * Returns true if the argument is required.
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68 *
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69 * @return bool true if parameter mode is self::REQUIRED, false otherwise
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70 */
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71 public function isRequired()
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72 {
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73 return self::REQUIRED === (self::REQUIRED & $this->mode);
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74 }
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75
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76 /**
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77 * Returns true if the argument can take multiple values.
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78 *
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79 * @return bool true if mode is self::IS_ARRAY, false otherwise
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80 */
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81 public function isArray()
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82 {
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83 return self::IS_ARRAY === (self::IS_ARRAY & $this->mode);
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84 }
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85
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86 /**
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87 * Sets the default value.
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88 *
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89 * @param string|string[]|null $default The default value
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90 *
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91 * @throws LogicException When incorrect default value is given
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92 */
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93 public function setDefault($default = null)
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94 {
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95 if (self::REQUIRED === $this->mode && null !== $default) {
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96 throw new LogicException('Cannot set a default value except for InputArgument::OPTIONAL mode.');
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97 }
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98
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99 if ($this->isArray()) {
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100 if (null === $default) {
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101 $default = [];
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102 } elseif (!\is_array($default)) {
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103 throw new LogicException('A default value for an array argument must be an array.');
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104 }
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105 }
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106
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107 $this->default = $default;
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108 }
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109
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110 /**
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111 * Returns the default value.
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112 *
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113 * @return string|string[]|null The default value
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114 */
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115 public function getDefault()
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116 {
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117 return $this->default;
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118 }
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119
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120 /**
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121 * Returns the description text.
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122 *
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123 * @return string The description text
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124 */
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125 public function getDescription()
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126 {
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127 return $this->description;
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128 }
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129 }
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