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<?php |
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namespace LaravelFreelancerNL\Aranguent\Query\Concerns; |
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use LaravelFreelancerNL\Aranguent\Query\Builder; |
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trait CompilesColumns |
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{ |
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/** |
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* Compile the "RETURN" portion of the query. |
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* |
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* @param Builder $builder |
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* @param array $columns |
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* |
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* @return Builder |
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*/ |
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protected function compileColumns(Builder $builder, array $columns): Builder |
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{ |
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$returnDocs = []; |
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$returnAttributes = []; |
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$values = []; |
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// Prepare columns |
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foreach ($columns as $column) { |
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// Extract rows |
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if (substr($column, strlen($column) - 2) === '.*') { |
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$table = substr($column, 0, strlen($column) - 2); |
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$returnDocs[] = $this->getTableAlias($table); |
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continue; |
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} |
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if ($column != null && $column != '*') { |
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[$column, $alias] = $this->extractAlias($column); |
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$returnAttributes[$alias] = $this->normalizeColumn($builder, $column); |
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} |
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} |
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$values = $this->determineReturnValues($builder, $returnAttributes, $returnDocs); |
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$builder->aqb = $builder->aqb->return($values, (bool) $builder->distinct); |
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return $builder; |
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} |
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protected function determineReturnValues($builder, $returnAttributes = [], $returnDocs = []) |
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{ |
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$values = $this->mergeReturnAttributes($returnAttributes, $returnDocs); |
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$values = $this->mergeReturnDocs($values, $builder, $returnAttributes, $returnDocs); |
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if ($builder->aggregate !== null) { |
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$values = ['aggregate' => 'aggregateResult']; |
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} |
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if (empty($values)) { |
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$values = $this->getTableAlias($builder->from); |
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if (is_array($builder->joins) && !empty($builder->joins)) { |
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$values = $this->mergeJoinResults($builder, $values); |
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} |
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} |
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return $values; |
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} |
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protected function mergeReturnAttributes($returnAttributes, $returnDocs) |
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{ |
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$values = []; |
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if (! empty($returnAttributes)) { |
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$values = $returnAttributes; |
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} |
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// If there is just one attribute/column given we assume that you want a list of values |
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// instead of a list of objects |
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if (count($returnAttributes) == 1 && empty($returnDocs)) { |
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$values = reset($returnAttributes); |
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} |
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return $values; |
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} |
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protected function mergeReturnDocs($values, $builder, $returnAttributes, $returnDocs) |
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{ |
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if (! empty($returnAttributes) && ! empty($returnDocs)) { |
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$returnDocs[] = $returnAttributes; |
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} |
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if (! empty($returnDocs)) { |
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$values = $builder->aqb->merge(...$returnDocs); |
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} |
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return $values; |
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} |
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protected function mergeJoinResults($builder, $baseTable) |
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{ |
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$tablesToJoin = []; |
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foreach ($builder->joins as $join) { |
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$tablesToJoin[] = $this->getTableAlias($join->table); |
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} |
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$tablesToJoin = array_reverse($tablesToJoin); |
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$tablesToJoin[] = $baseTable; |
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return $builder->aqb->merge(...$tablesToJoin); |
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} |
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} |
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