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1 | <?php |
2 | /** |
3 | * Pop PHP Framework (https://www.popphp.org/) |
4 | * |
5 | * @link https://github.com/popphp/popphp-framework |
6 | * @author Nick Sagona, III <dev@noladev.com> |
7 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. |
8 | * @license https://www.popphp.org/license New BSD License |
9 | */ |
10 | |
11 | /** |
12 | * @namespace |
13 | */ |
14 | namespace Pop\Db\Sql; |
15 | |
16 | use Pop\Db\Sql\Parser\Expression; |
17 | use Pop\Db\Sql\Parser\Operator; |
18 | |
19 | /** |
20 | * Join class |
21 | * |
22 | * @category Pop |
23 | * @package Pop\Db |
24 | * @author Nick Sagona, III <dev@noladev.com> |
25 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. |
26 | * @license https://www.popphp.org/license New BSD License |
27 | * @version 6.6.5 |
28 | */ |
29 | class Join |
30 | { |
31 | |
32 | /** |
33 | * Allowed JOIN keywords |
34 | * @var array |
35 | */ |
36 | protected static $allowedJoins = [ |
37 | 'JOIN', 'LEFT JOIN', 'RIGHT JOIN', 'FULL JOIN', |
38 | 'OUTER JOIN', 'LEFT OUTER JOIN', 'RIGHT OUTER JOIN', 'FULL OUTER JOIN', |
39 | 'INNER JOIN', 'LEFT INNER JOIN', 'RIGHT INNER JOIN', 'FULL INNER JOIN' |
40 | ]; |
41 | |
42 | /** |
43 | * SQL object |
44 | * @var ?AbstractSql |
45 | */ |
46 | protected ?AbstractSql $sql = null; |
47 | |
48 | /** |
49 | * Foreign table |
50 | * @var ?string |
51 | */ |
52 | protected ?string $foreignTable = null; |
53 | |
54 | /** |
55 | * Columns |
56 | * @var array |
57 | */ |
58 | protected array $columns = []; |
59 | |
60 | /** |
61 | * Join type |
62 | * @var string |
63 | */ |
64 | protected string $join = 'JOIN'; |
65 | |
66 | /** |
67 | * Constructor |
68 | * |
69 | * Instantiate the JOIN object |
70 | * |
71 | * @param AbstractSql $sql |
72 | * @param mixed $foreignTable |
73 | * @param array $columns |
74 | * @param string $join |
75 | * @throws Exception |
76 | */ |
77 | public function __construct(AbstractSql $sql, mixed $foreignTable, array $columns, string $join = 'JOIN') |
78 | { |
79 | $this->sql = $sql; |
80 | |
81 | // If it's a sub-select |
82 | if (($foreignTable instanceof Select) || ($foreignTable instanceof \Pop\Db\Sql)) { |
83 | $this->foreignTable = (string)$foreignTable; |
84 | } else if (is_array($foreignTable)) { |
85 | if (count($foreignTable) !== 1) { |
86 | throw new Exception('Error: Only one table can be used in JOIN clause.'); |
87 | } |
88 | $alias = array_key_first($foreignTable); |
89 | $table = $foreignTable[$alias]; |
90 | $this->foreignTable = $this->sql->quoteId($table) . ' AS ' . $this->sql->quoteId($alias); |
91 | } else { |
92 | $this->foreignTable = $this->sql->quoteId($foreignTable); |
93 | } |
94 | |
95 | $this->columns = $columns; |
96 | $this->join = (in_array(strtoupper($join), self::$allowedJoins)) ? strtoupper($join) : 'JOIN'; |
97 | } |
98 | |
99 | /** |
100 | * Get foreign table |
101 | * |
102 | * @return string |
103 | */ |
104 | public function getForeignTable(): string |
105 | { |
106 | return $this->foreignTable; |
107 | } |
108 | |
109 | /** |
110 | * Get columns |
111 | * |
112 | * @return array |
113 | */ |
114 | public function getColumns(): array |
115 | { |
116 | return $this->columns; |
117 | } |
118 | |
119 | /** |
120 | * Get JOIN type |
121 | * |
122 | * @return string |
123 | */ |
124 | public function getJoin(): string |
125 | { |
126 | return $this->join; |
127 | } |
128 | |
129 | /** |
130 | * Render JOIN |
131 | * |
132 | * @return string |
133 | */ |
134 | public function render(): string |
135 | { |
136 | $columns = []; |
137 | |
138 | foreach ($this->columns as $column1 => $column2) { |
139 | if (Expression::isShorthand($column1)) { |
140 | ['column' => $column1, 'operator' => $operator] = Operator::parse($column1); |
141 | if (($column2 === null) && ($operator == 'NOT')) { |
142 | $operator = 'IS ' . $operator; |
143 | } |
144 | } else { |
145 | $operator = ($column2 === null) ? 'IS' : '='; |
146 | } |
147 | $operator = ' ' . $operator . ' '; |
148 | |
149 | if (is_array($column2)) { |
150 | foreach ($column2 as $c) { |
151 | if ($c === null) { |
152 | $c = 'NULL'; |
153 | } else if (is_string($c) && str_contains($c, '.')) { |
154 | $c = $this->sql->quoteId($c); |
155 | } |
156 | $columns[] = ((str_contains($column1, '.')) ? $this->sql->quoteId($column1) : $column1) . $operator . $c; |
157 | } |
158 | } else { |
159 | if ($column2 === null) { |
160 | $column2 = 'NULL'; |
161 | } else if (is_string($column2)) { |
162 | $column2 = $this->sql->quoteId($column2); |
163 | } |
164 | $columns[] = $this->sql->quoteId($column1) . $operator . $column2; |
165 | } |
166 | } |
167 | |
168 | return $this->join . ' ' . $this->foreignTable . ' ON (' . implode(' AND ', $columns) . ')'; |
169 | } |
170 | |
171 | /** |
172 | * Return JOIN as string |
173 | * |
174 | * @return string |
175 | */ |
176 | public function __toString(): string |
177 | { |
178 | return $this->render(); |
179 | } |
180 | |
181 | } |