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<?php |
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/** |
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* @author Jared King <[email protected]> |
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* |
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* @link http://jaredtking.com |
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* |
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* @copyright 2015 Jared King |
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* @license MIT |
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*/ |
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namespace JAQB\Statement; |
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class FromStatement extends Statement |
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{ |
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const FROM = 0; |
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const INSERT = 1; |
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const UPDATE = 2; |
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const DELETE = 3; |
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/** |
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* @var int |
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*/ |
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protected $type; |
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/** |
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* @var array |
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*/ |
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protected $tables = []; |
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/** |
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* @var array |
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*/ |
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protected $joins = []; |
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/** |
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* @param int $type type of table statement |
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*/ |
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public function __construct($type = self::FROM) |
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{ |
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$this->type = $type; |
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} |
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/** |
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* Adds one or more tables to this statement. |
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* Supported input styles: |
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* - addTable('Table,Table2') |
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* - addTable(['Table','Table2']). |
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* |
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* @param string|array $tables |
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* |
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* @return self |
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*/ |
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View Code Duplication |
public function addTable($tables) |
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{ |
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if (!is_array($tables)) { |
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$tables = array_map(function ($t) { |
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return trim($t); |
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}, explode(',', $tables)); |
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} |
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$this->tables = array_merge($this->tables, $tables); |
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return $this; |
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} |
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/** |
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* Adds a join condition to this statement |
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* Supported input styles: |
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* - addJoin('Table,Table2') |
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* - addJoin(['Table','Table2']). |
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* |
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* @param string|array $tables table names |
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* @param string $on ON condition |
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* @param string $using USING columns |
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* @param string $type join type, i.e. OUTER JOIN, CROSS JOIN |
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* |
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* @return self |
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*/ |
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public function addJoin($tables, $on = null, $using = null, $type = 'JOIN') |
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{ |
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if (!is_array($tables)) { |
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$tables = array_map(function ($t) { |
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return trim($t); |
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}, explode(',', $tables)); |
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} |
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if ($using !== null) { |
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$using = array_map(function ($column) { |
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return trim($column); |
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}, explode(',', $using)); |
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} else { |
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$using = []; |
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} |
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$this->joins[] = [ |
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$type, |
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$tables, |
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$on, |
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$using, |
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]; |
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return $this; |
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} |
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/** |
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* Gets the table(s) associated with this statement. |
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* |
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* @return array |
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*/ |
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public function getTables() |
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{ |
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return $this->tables; |
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} |
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/** |
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* Gets the join(s) associated with this statement. |
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* |
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* @return array |
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*/ |
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public function getJoins() |
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{ |
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return $this->joins; |
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} |
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public function build() |
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{ |
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$sql = []; |
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// prefix |
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if ($this->type === self::FROM) { |
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$sql[] = 'FROM'; |
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} elseif ($this->type === self::UPDATE) { |
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$sql[] = 'UPDATE'; |
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} elseif ($this->type === self::INSERT) { |
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$sql[] = 'INSERT INTO'; |
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} elseif ($this->type === self::DELETE) { |
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$sql[] = 'DELETE FROM'; |
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} |
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// tables |
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$tables = $this->tables; |
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foreach ($tables as &$table) { |
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$table = $this->escapeIdentifier($table); |
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} |
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if (count($tables) == 0) { |
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return ''; |
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} |
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$sql[] = implode(',', array_filter($tables)); |
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// joins |
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$sql[] = $this->buildJoins($this->joins); |
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return implode(' ', array_filter($sql)); |
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} |
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/** |
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* Builds a list of joins. |
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* |
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* @param array $joins |
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* |
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* @return string |
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*/ |
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private function buildJoins(array $joins) |
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{ |
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foreach ($joins as &$join) { |
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// table(s) |
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foreach ($join[1] as &$table) { |
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$table = $this->escapeIdentifier($table); |
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} |
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$join[1] = implode(', ', array_filter($join[1])); |
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// on clause |
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View Code Duplication |
if ($join[2]) { |
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$join[2] = 'ON '.$join[2]; |
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} else { |
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unset($join[2]); |
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} |
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// using clause |
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foreach ($join[3] as &$column) { |
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$column = $this->escapeIdentifier($column); |
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} |
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$join[3] = implode(', ', array_filter($join[3])); |
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View Code Duplication |
if ($join[3]) { |
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$join[3] = 'USING ('.$join[3].')'; |
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} else { |
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unset($join[3]); |
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} |
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$join = implode(' ', $join); |
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} |
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return implode(' ', array_filter($joins)); |
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} |
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} |
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jaredtking /
jaqb
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