1 | <?php |
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11 | class MemoizingModel extends Model |
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12 | { |
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13 | /** |
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14 | * List of attributes to be memoized |
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15 | * |
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16 | * @var Array |
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17 | */ |
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18 | protected static $memoized = []; |
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19 | |||
20 | /** |
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21 | * Structure where memoized attributes are stored |
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22 | * |
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23 | * @var Array |
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24 | */ |
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25 | protected $memoized_values = []; |
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26 | |||
27 | /** |
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28 | * Is memoizing enabled? |
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29 | * |
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30 | * @var bool |
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31 | */ |
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32 | protected static $memoizing_enabled = true; |
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33 | |||
34 | /** |
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35 | * See if attribute has been memoized, and if so return it, else do |
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36 | * parent procedure for getting attribute |
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37 | * |
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38 | * @param string $key |
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39 | * @return mixed $value |
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40 | */ |
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41 | public function getAttribute($key) |
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42 | { |
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43 | $value = null; |
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44 | |||
45 | if ($this->shouldBeMemoized($key)) { |
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46 | if (array_key_exists($key, $this->memoized_values)) { |
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47 | $value = $this->memoized_values[$key]; |
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48 | } else { |
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49 | $value = parent::getAttribute($key); |
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50 | $this->memoizeAttribute($key, $value); |
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51 | } |
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52 | } else { |
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53 | $value = parent::getAttribute($key); |
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54 | } |
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55 | |||
56 | return $value; |
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57 | } |
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58 | |||
59 | /** |
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60 | * Set (and clear memoized value for) a given attribute on the model. |
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61 | * |
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62 | * @param string $key |
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63 | * @param mixed $value |
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64 | * @return $this |
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65 | */ |
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66 | 4 | public function setAttribute($key, $value) |
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67 | { |
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68 | // Remove the old value, no one wants it anymore |
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69 | 4 | if (array_key_exists($key, $this->memoized_values)) { |
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70 | unset($this->memoized_values[$key]); |
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71 | } |
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72 | |||
73 | 4 | return parent::setAttribute($key, $value); |
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74 | } |
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75 | |||
76 | /** |
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77 | * Memoize attributes |
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78 | * |
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79 | * @param string $key |
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80 | * @param mixed $value |
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81 | */ |
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82 | public function memoizeAttribute($key, $value) |
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83 | { |
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84 | $this->memoized_values[$key] = $value; |
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85 | } |
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86 | |||
87 | /** |
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88 | * Get the memoized attributes for the model. |
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89 | * |
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90 | * @return array |
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91 | */ |
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92 | 3 | public function getMemoized() |
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93 | { |
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94 | 3 | return static::$memoized; |
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95 | } |
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96 | |||
97 | /** |
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98 | * Set the memoized attributes for the model. |
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99 | * |
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100 | * @param array $memoized |
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101 | * @return $this |
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102 | */ |
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103 | 2 | public static function setMemoized(array $memoized) |
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104 | { |
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105 | 2 | static::$memoized = $memoized; |
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106 | 2 | } |
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107 | |||
108 | /** |
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109 | * Disable all memoization. |
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110 | * |
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111 | * @param bool $state |
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112 | * @return void |
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113 | */ |
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114 | public static function disableMemoization($state = false) |
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118 | |||
119 | /** |
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120 | * Enable memoization. |
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121 | * |
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122 | * @return void |
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123 | */ |
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124 | public static function enableMemoization() |
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128 | |||
129 | /** |
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130 | * Check if attribute should be memoized |
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131 | * |
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132 | * @param string $key |
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133 | * @return bool should_be_memoized |
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134 | */ |
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135 | 2 | public function shouldBeMemoized($key) |
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140 | } |
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141 |
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.