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<?php |
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namespace Hoooklife\DynamodbPodm\Query; |
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use Hoooklife\DynamodbPodm\Collection; |
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use Hoooklife\DynamodbPodm\DB; |
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use Hoooklife\DynamodbPodm\Grammars\DynamoDBGrammar; |
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class Builder |
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{ |
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/** |
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* 查询排序 |
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*/ |
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public $limit; |
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public $wheres = []; |
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public $bindings = []; |
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public $columns; |
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public $table; |
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/** |
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* All of the available clause operators. |
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* |
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* @var array |
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*/ |
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public $operators = [ |
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'=', '<', '>', '<=', '>=', '<>', '!=' |
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]; |
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public $reservedKey = [ |
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'key' |
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]; |
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/** @var DynamoDBGrammar */ |
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private $grammar; |
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public function __construct($connection = 'default') |
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{ |
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switch (DB::$config[$connection]['driver']) { |
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case "dynamedb": |
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$this->grammar = new DynamoDBGrammar($this, DB::$config[$connection]); |
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break; |
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default: |
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throw new \Exception("bad driver"); |
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} |
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} |
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/** |
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* 设置要查出的列 |
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* |
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* @param array|mixed $columns |
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* @return $this |
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*/ |
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public function select($columns = ['*']) |
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{ |
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$this->columns = is_array($columns) ? $columns : func_get_args(); |
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return $this; |
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} |
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public function addSelect($columns) |
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{ |
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$columns = is_array($columns) ? $columns : func_get_args(); |
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$this->columns = array_merge((array)$this->columns, $columns); |
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return $this; |
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} |
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/** |
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* Set the table which the query is targeting. |
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* |
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* @param string $table |
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* @return $this |
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*/ |
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public function from($table) |
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{ |
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$this->table = $table; |
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return $this; |
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} |
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/** |
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* Add a basic where clause to the query. |
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* |
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* @param string|array|\Closure $column |
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* @param mixed $operator |
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* @param mixed $value |
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* @param string $boolean |
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* @return $this |
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*/ |
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public function where($column, $operator = null, $value = null, $boolean = 'and') |
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{ |
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if (is_array($column)) { |
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// 递归 |
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foreach ($column as $key => $value) { |
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if (is_numeric($key) && is_array($value)) { |
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$this->where(...array_values($value)); |
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} else { |
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$this->where($key, '=', $value, $boolean); |
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} |
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} |
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return $this; |
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// return $this->addArrayOfWheres($column, $boolean); |
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} |
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if (func_num_args() === 2 || $this->invalidOperator($operator)) { |
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list($value, $operator) = [$operator, '=']; |
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} |
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// where in |
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if (is_array($value)) { |
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return $this->whereIn($column, $boolean); |
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} |
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// is null |
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if (is_null($value)) { |
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return $this->whereNull($column, $boolean, $operator !== '='); |
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} |
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$type = 'Basic'; |
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$this->wheres[] = compact( |
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'type', 'column', 'operator', 'value', 'boolean' |
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); |
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// TODO 参数绑定 |
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// $this->addBinding($value, 'where'); |
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return $this; |
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} |
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/** |
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* Determine if the given operator is supported. |
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* |
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* @param string $operator |
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* @return bool |
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*/ |
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protected function invalidOperator($operator) |
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{ |
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return !in_array(strtolower($operator), $this->operators, true) && |
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!in_array(strtolower($operator), $this->grammar->getOperators(), true); |
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} |
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// /** |
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// * 向查询添加排序语句。 |
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// * |
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// * @param string $column |
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// * @param string $direction |
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// * @return $this |
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// */ |
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// public function orderBy($columns, $direction = 'asc') |
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// { |
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// $orders = is_array($columns) ? $columns : [$columns => $direction]; |
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// $this->orders = array_merge($this->orders, $orders); |
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// return $this; |
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// } |
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// public function offset($value) |
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// { |
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// $this->offset = max(0, $value); |
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// return $this; |
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// } |
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// /** |
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// * Alias to set the "offset" value of the query. |
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// * |
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// * @param int $value |
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// * @return \Illuminate\Database\Query\Builder|static |
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// */ |
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// public function skip($value) |
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// { |
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// return $this->offset($value); |
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// } |
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/** |
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* Alias to set the "limit" value of the query. |
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* |
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* @param int $value |
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* @return \Illuminate\Database\Query\Builder|static |
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*/ |
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public function take($value) |
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{ |
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return $this->limit($value); |
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} |
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/** |
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* Set the "limit" value of the query. |
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* |
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* @param int $value |
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* @return $this |
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*/ |
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public function limit($value) |
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{ |
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// FIXME ??? 为啥等于0 |
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if ($value > 0) { |
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$this->limit = $value; |
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} |
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return $this; |
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} |
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/** |
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* Set the limit and offset for a given page. |
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* |
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* @param int $page |
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* @param int $perPage |
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* @return \Illuminate\Database\Query\Builder|static |
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*/ |
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public function forPage($page, $perPage = 15) |
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{ |
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return $this->skip(($page - 1) * $perPage)->take($perPage); |
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} |
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/** |
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* Get the SQL representation of the query. |
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* |
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* @return string |
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*/ |
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public function toSql() |
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{ |
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return $this->grammar->compileSelect($this); |
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} |
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/** |
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* Get a single column's value from the first result of a query. |
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* |
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* @param string $column |
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* @return mixed |
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*/ |
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public function value($column) |
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{ |
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$result = (array)$this->first([$column]); |
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return count($result) > 0 ? reset($result) : null; |
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} |
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/** |
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* Execute the query and get the first result. |
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* |
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* @param array $columns |
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* @return \Illuminate\Database\Eloquent\Model|object|static|null |
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*/ |
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public function first($columns = ['*']) |
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{ |
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return reset($this->take(1)->all($columns)); |
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} |
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/** |
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* Execute the query as a "select" statement. |
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* |
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* @param array $columns |
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* @return Collection |
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*/ |
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public function all($columns = ['*']): Collection |
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{ |
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return $this->grammar->all($columns); |
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} |
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/** |
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* @param array $data |
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* @return \Aws\Result |
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*/ |
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public function insert(array $data) |
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{ |
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return $this->grammar->insert($data); |
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} |
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} |
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