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<?php |
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namespace duxet\Rethinkdb\RQL; |
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use r; |
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class FilterBuilder |
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{ |
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public function __construct($document) |
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{ |
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$this->document = $document; |
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} |
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public function compileWheres($wheres) |
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{ |
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$chain = null; |
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foreach ($wheres as $i => &$where) { |
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$method = 'build'.$where['type'].'filter'; |
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$filter = self::{$method} |
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($where); |
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if (!$chain) { |
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$chain = $filter; |
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} |
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// Wrap the where with an $or operator. |
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if ($where['boolean'] == 'or') { |
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$chain = $chain->rOr($filter); |
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} // If there are more wheres, then wrap existing filters with and |
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elseif ($chain && count($wheres) > 1) { |
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$chain = $chain->rAnd($filter); |
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} |
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} |
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return $chain; |
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} |
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protected function buildBasicFilter($where) |
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{ |
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$operator = isset($where['operator']) ? $where['operator'] : '='; |
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$operator = strtolower($operator); |
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// != is same as <>, so just use <> |
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if ($operator == '!=') { |
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$operator = '<>'; |
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} |
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$value = isset($where['value']) ? $where['value'] : null; |
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$field = $this->getField($where['column']); |
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switch ($operator) { |
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case '>': |
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return $field->gt($value); |
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case '>=': |
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return $field->ge($value); |
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case '<': |
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return $field->lt($value); |
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case '<=': |
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return $field->le($value); |
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case '<>': |
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return $field->ne($value); |
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case 'contains': |
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return $field->contains($value); |
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case 'exists': |
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$field = $field->rDefault(null); |
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return ($value) ? $field : $field->not(); |
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case 'type': |
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return $field->typeOf()->eq(strtoupper($value)); |
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case 'mod': |
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$mod = $field->mod((int) $value[0])->eq((int) $value[1]); |
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return $field->typeOf()->eq('NUMBER')->rAnd($mod); |
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case 'size': |
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$size = $field->count()->eq((int) $value); |
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return $field->typeOf()->eq('ARRAY')->rAnd($size); |
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case 'regexp': |
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$match = $field->match($value); |
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return $field->typeOf()->eq('STRING')->rAnd($match); |
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case 'not regexp': |
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$match = $field->match($value)->not(); |
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return $field->typeOf()->eq('STRING')->rAnd($match); |
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case 'like': |
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$regex = str_replace('%', '', $value); |
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// Convert like to regular expression. |
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if (!starts_with($value, '%')) { |
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$regex = '^'.$regex; |
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} |
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if (!ends_with($value, '%')) { |
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$regex = $regex.'$'; |
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} |
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$match = $field->match('(?i)'.$regex); |
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return $field->typeOf()->eq('STRING')->rAnd($match); |
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default: |
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return $field->eq($value); |
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} |
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} |
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protected function buildBetweenFilter($where) |
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{ |
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$row = $this->getField($where['column']); |
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$values = $where['values']; |
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if ($where['not']) { |
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$or = $row->ge($values[1]); |
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return $row->le($values[0])->rOr($or); |
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} else { |
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$and = $row->le($values[1]); |
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return $row->ge($values[0])->rAnd($and); |
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} |
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} |
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protected function buildNullFilter($where) |
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{ |
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$where['operator'] = '='; |
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$where['value'] = null; |
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return $this->buildBasicFilter($where); |
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} |
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protected function buildNotNullFilter($where) |
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{ |
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return $this->buildNullFilter($where)->not(); |
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} |
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protected function buildInFilter($where) |
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{ |
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$field = $this->getField($where['column']); |
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$values = array_values($where['values']); |
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return r\expr($values)->contains($field); |
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} |
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protected function buildNotInFilter($where) |
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{ |
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return $this->buildInFilter($where)->not(); |
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} |
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protected function buildNestedFilter($where) |
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{ |
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return $where['query']->buildFilter($this->document); |
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} |
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protected function getField($name) |
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{ |
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$document = $this->document; |
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return $document($name); |
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} |
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} |
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duxet /
laravel-rethinkdb
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: