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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Finder\Output; |
| 6 | |
| 7 | use Cosray\Context; |
| 8 | use Cosray\Exception\ParserOutputException; |
| 9 | use Cosray\Finder\Input\Token; |
| 10 | use Cosray\Finder\Input\TokenType; |
| 11 | |
| 12 | final readonly class Comparison extends Expression implements Output |
| 13 | { |
| 14 | public function __construct( |
| 15 | private Token $left, |
| 16 | private Token $operator, |
| 17 | private Token $right, |
| 18 | private Context $context, |
| 19 | private array $builtins, |
| 20 | ) {} |
| 21 | |
| 22 | public function get(): string |
| 23 | { |
| 24 | switch ($this->operator->type) { |
| 25 | case TokenType::Like: |
| 26 | case TokenType::Unlike: |
| 27 | case TokenType::ILike: |
| 28 | case TokenType::IUnlike: |
| 29 | case TokenType::In: |
| 30 | case TokenType::NotIn: |
| 31 | return $this->getSqlExpression(); |
| 32 | } |
| 33 | |
| 34 | if ($this->left->type === TokenType::Field) { |
| 35 | if ($this->right->type === TokenType::Builtin || $this->right->type === TokenType::Field) { |
| 36 | return $this->getSqlExpression(); |
| 37 | } |
| 38 | |
| 39 | return $this->getJsonPathExpression(); |
| 40 | } |
| 41 | |
| 42 | if ($this->left->type === TokenType::Builtin) { |
| 43 | return $this->getSqlExpression(); |
| 44 | } |
| 45 | |
| 46 | throw new ParserOutputException( |
| 47 | $this->left, |
| 48 | 'Only fields or `path` are allowed on the left side of an expression.', |
| 49 | ); |
| 50 | } |
| 51 | |
| 52 | private function getJsonPathExpression(): string |
| 53 | { |
| 54 | [$operator, $jsonOperator, $right, $negate] = match ($this->operator->type) { |
| 55 | TokenType::Equal => ['@@', '==', $this->getRight(), false], |
| 56 | TokenType::Regex => ['@?', '?', $this->getRegex(false), false], |
| 57 | TokenType::IRegex => ['@?', '?', $this->getRegex(true), false], |
| 58 | TokenType::NotRegex => ['@?', '?', $this->getRegex(false), true], |
| 59 | TokenType::INotRegex => ['@?', '?', $this->getRegex(true), true], |
| 60 | TokenType::In => ['@@', 'in', $this->getRight(), false], |
| 61 | TokenType::NotIn => ['@@', 'nin', $this->getRight(), false], |
| 62 | default => ['@@', $this->operator->lexeme, $this->getRight(), false], |
| 63 | }; |
| 64 | |
| 65 | unset($operator); |
| 66 | $left = $this->getJsonFieldExpression(); |
| 67 | $root = str_ends_with($this->left->lexeme, '.*') ? '$[*]' : '$'; |
| 68 | $path = $root . ' ' . $jsonOperator . ' ' . $right; |
| 69 | |
| 70 | return sprintf( |
| 71 | '%sjsonb_path_exists(%s, %s)', |
| 72 | $negate ? 'NOT ' : '', |
| 73 | $left, |
| 74 | $this->context->db->quote($path), |
| 75 | ); |
| 76 | } |
| 77 | |
| 78 | private function getRegex(bool $ignoreCase): string |
| 79 | { |
| 80 | if (!($this->right->type === TokenType::String)) { |
| 81 | throw new ParserOutputException( |
| 82 | $this->right, |
| 83 | 'Only strings are allowed on the right side of a regex expressions.', |
| 84 | ); |
| 85 | } |
| 86 | |
| 87 | $case = $ignoreCase ? ' flag "i"' : ''; |
| 88 | |
| 89 | // TODO: quote double quotes, check also in tests |
| 90 | $pattern = '"' . trim($this->context->db->quote($this->right->lexeme), "'") . '"'; |
| 91 | |
| 92 | return sprintf('(@ like_regex %s%s)', $pattern, $case); |
| 93 | } |
| 94 | |
| 95 | private function getJsonFieldExpression(): string |
| 96 | { |
| 97 | $parts = explode('.', $this->left->lexeme); |
| 98 | |
| 99 | if (count($parts) === 1) { |
| 100 | return $this->compileField( |
| 101 | $this->left->lexeme, |
| 102 | 'n.content', |
| 103 | asIs: true, |
| 104 | localeIds: $this->localeIds(), |
| 105 | ); |
| 106 | } |
| 107 | |
| 108 | if (count($parts) === 2 && $parts[1] === '?') { |
| 109 | return "n.content->'{$parts[0]}'->'value'->'{$this->context->localeId()}'"; |
| 110 | } |
| 111 | |
| 112 | if (count($parts) === 2 && $parts[1] === '*') { |
| 113 | return "jsonb_path_query_array(n.content->'{$parts[0]}'->'value', '$.*')"; |
| 114 | } |
| 115 | |
| 116 | if (count($parts) > 2 && in_array('?', $parts, true)) { |
| 117 | throw new ParserOutputException( |
| 118 | $this->left, |
| 119 | 'The questionmark is allowed after the first dot only.', |
| 120 | ); |
| 121 | } |
| 122 | |
| 123 | return $this->compileField( |
| 124 | $this->left->lexeme, |
| 125 | 'n.content', |
| 126 | asIs: true, |
| 127 | localeIds: $this->localeIds(), |
| 128 | ); |
| 129 | } |
| 130 | |
| 131 | private function localeIds(): array |
| 132 | { |
| 133 | $ids = []; |
| 134 | $locale = $this->context->locale(); |
| 135 | |
| 136 | while ($locale) { |
| 137 | $ids[] = $locale->id; |
| 138 | $locale = $locale->fallback(); |
| 139 | } |
| 140 | |
| 141 | return $ids; |
| 142 | } |
| 143 | |
| 144 | private function getRight(): string |
| 145 | { |
| 146 | return match ($this->right->type) { |
| 147 | TokenType::String => $this->quote($this->right->lexeme), |
| 148 | TokenType::Number, TokenType::Boolean, TokenType::List, TokenType::Null => $this->right->lexeme, |
| 149 | default => throw new ParserOutputException( |
| 150 | $this->right, |
| 151 | 'The right hand side in a field expression must be a literal', |
| 152 | ), |
| 153 | }; |
| 154 | } |
| 155 | |
| 156 | private function getSqlExpression(): string |
| 157 | { |
| 158 | return sprintf( |
| 159 | '%s %s %s', |
| 160 | $this->getOperand($this->left, $this->context->db, $this->builtins, $this->context), |
| 161 | $this->getOperator($this->operator->type), |
| 162 | $this->getOperand($this->right, $this->context->db, $this->builtins, $this->context), |
| 163 | ); |
| 164 | } |
| 165 | |
| 166 | private function quote(string $string): string |
| 167 | { |
| 168 | return sprintf( |
| 169 | '"%s"', |
| 170 | // Escape all unescaped double quotes |
| 171 | // TODO: can prepended backslashes be exploited |
| 172 | preg_replace( |
| 173 | '/(?<!\\\\)(")/', |
| 174 | '\\"', |
| 175 | trim($this->context->db->quote($string), "'"), |
| 176 | ), |
| 177 | ); |
| 178 | } |
| 179 | } |