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1 | <?php |
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2 | |||
3 | namespace Ddeboer\DataImport\Reader; |
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4 | |||
5 | use Ddeboer\DataImport\Reader; |
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6 | use Ddeboer\DataImport\Exception\ReaderException; |
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7 | |||
8 | /** |
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9 | * Takes multiple readers for processing in the same workflow |
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10 | * |
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11 | * @author Adam Paterson <[email protected]> |
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12 | * @author Aydin Hassan <[email protected]> |
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13 | */ |
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14 | class OneToManyReader implements CountableReader |
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15 | { |
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16 | /** |
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17 | * @var Reader |
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18 | */ |
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19 | protected $leftReader; |
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20 | |||
21 | /** |
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22 | * @var Reader |
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23 | */ |
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24 | protected $rightReader; |
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25 | |||
26 | /** |
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27 | * @var string |
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28 | */ |
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29 | protected $leftJoinField; |
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30 | |||
31 | /** |
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32 | * @var string |
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33 | */ |
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34 | protected $rightJoinField; |
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35 | |||
36 | /** |
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37 | * Key to nest the rightRows under |
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38 | * |
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39 | * @var string |
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40 | */ |
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41 | protected $nestKey; |
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42 | |||
43 | /** |
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44 | * @param Reader $leftReader |
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45 | * @param Reader $rightReader |
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46 | * @param string $nestKey |
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47 | * @param string $leftJoinField |
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48 | * @param string $rightJoinField |
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49 | */ |
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50 | 9 | public function __construct( |
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51 | Reader $leftReader, |
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52 | Reader $rightReader, |
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53 | $nestKey, |
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54 | $leftJoinField, |
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55 | $rightJoinField = null |
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56 | ) { |
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57 | 9 | if (is_null($rightJoinField)) { |
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58 | 8 | $rightJoinField = $leftJoinField; |
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59 | 8 | } |
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60 | |||
61 | 9 | $this->leftJoinField = $leftJoinField; |
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62 | 9 | $this->rightJoinField = $rightJoinField; |
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63 | 9 | $this->leftReader = $leftReader; |
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64 | 9 | $this->rightReader = $rightReader; |
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65 | 9 | $this->nestKey = $nestKey; |
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66 | 9 | } |
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67 | |||
68 | /** |
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69 | * Create an array of children in the leftRow, |
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70 | * with the data returned from the right reader |
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71 | * Where the ID fields Match |
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72 | * |
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73 | * @return array |
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74 | * |
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75 | * @throws ReaderException |
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76 | */ |
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77 | 7 | public function current() |
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78 | { |
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79 | 7 | $leftRow = $this->leftReader->current(); |
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80 | |||
81 | 7 | if (array_key_exists($this->nestKey, $leftRow)) { |
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82 | 1 | throw new ReaderException( |
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83 | 1 | sprintf( |
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84 | 1 | 'Left Row: "%s" Reader already contains a field named "%s". Please choose a different nest key field', |
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85 | 1 | $this->key(), |
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86 | 1 | $this->nestKey |
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87 | 1 | ) |
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88 | 1 | ); |
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89 | } |
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90 | 6 | $leftRow[$this->nestKey] = []; |
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91 | |||
92 | 6 | $leftId = $this->getRowId($leftRow, $this->leftJoinField); |
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93 | 5 | $rightRow = $this->rightReader->current(); |
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94 | 5 | $rightId = $this->getRowId($rightRow, $this->rightJoinField); |
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95 | |||
96 | 4 | while ($leftId == $rightId && $this->rightReader->valid()) { |
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97 | |||
98 | 3 | $leftRow[$this->nestKey][] = $rightRow; |
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99 | 3 | $this->rightReader->next(); |
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100 | |||
101 | 3 | $rightRow = $this->rightReader->current(); |
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102 | |||
103 | 3 | if($this->rightReader->valid()) { |
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104 | 3 | $rightId = $this->getRowId($rightRow, $this->rightJoinField); |
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105 | 3 | } |
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106 | 3 | } |
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107 | |||
108 | 4 | return $leftRow; |
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109 | } |
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110 | |||
111 | /** |
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112 | * @param array $row |
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113 | * @param string $idField |
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114 | * |
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115 | * @return mixed |
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116 | * |
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117 | * @throws ReaderException |
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118 | */ |
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119 | 6 | protected function getRowId(array $row, $idField) |
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120 | { |
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121 | 6 | if (!array_key_exists($idField, $row)) { |
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122 | 2 | throw new ReaderException( |
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123 | 2 | sprintf( |
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124 | 2 | 'Row: "%s" has no field named "%s"', |
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125 | 2 | $this->key(), |
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126 | $idField |
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127 | 2 | ) |
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128 | 2 | ); |
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129 | } |
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130 | |||
131 | 5 | return $row[$idField]; |
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132 | } |
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133 | |||
134 | /** |
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135 | * {@inheritdoc} |
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136 | */ |
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137 | 4 | public function next() |
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138 | { |
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139 | 4 | $this->leftReader->next(); |
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140 | //right reader is iterated in current() method. |
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141 | 4 | } |
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142 | |||
143 | /** |
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144 | * {@inheritdoc} |
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145 | */ |
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146 | 3 | public function key() |
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147 | { |
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148 | 3 | return $this->leftReader->key(); |
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149 | } |
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150 | |||
151 | /** |
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152 | * {@inheritdoc} |
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153 | */ |
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154 | 4 | public function valid() |
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155 | { |
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156 | 4 | return $this->leftReader->valid() && $this->rightReader->valid(); |
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157 | } |
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158 | |||
159 | /** |
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160 | * {@inheritdoc} |
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161 | */ |
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162 | 7 | public function rewind() |
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163 | { |
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164 | 7 | $this->leftReader->rewind(); |
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165 | 7 | $this->rightReader->rewind(); |
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166 | 7 | } |
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167 | |||
168 | /** |
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169 | * {@inheritdoc} |
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170 | */ |
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171 | 1 | public function getFields() |
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172 | { |
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173 | 1 | return array_merge($this->leftReader->getFields(), [$this->nestKey]); |
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174 | } |
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175 | |||
176 | /** |
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177 | * {@inheritdoc} |
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178 | */ |
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179 | 1 | public function count() |
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180 | { |
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181 | 1 | return $this->leftReader->count(); |
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0 ignored issues
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182 | } |
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183 | } |
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184 |
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: