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<?php |
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namespace Hurrytimer; |
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|
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class SQL_Builder |
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{ |
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public $table; |
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public $charset_collate; |
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public $sql_fields = []; |
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const DELETE_CASCADE = 1; |
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public function __construct($_table, $_charset_collate) |
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{ |
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$this->table = $_table; |
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$this->charset_collate = $_charset_collate; |
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} |
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|
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public function create() |
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{ |
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$sql = "CREATE TABLE {$this->table} ("; |
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$this->sql_fields[] = $sql; |
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return $this; |
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} |
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private function _field($name, $type, $length, $unsigned = false, $is_nullable = false) |
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{ |
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$sql = $name . ' ' . strtoupper($type) . '(' . $length . ') '; |
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$sql .= ($unsigned ? 'UNSIGNED ' : ''); |
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$sql .= ($is_nullable ? 'NULL' : 'NOT NULL'); |
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return $sql; |
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} |
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public function string($name, $length = 50, $is_nullable = false) |
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{ |
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$sql = $this->_field($name, "VARCHAR", $length, false, $is_nullable); |
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$this->sql_fields[] = $sql; |
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return $this; |
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} |
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public function primary_key($name) |
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{ |
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$sql = "PRIMARY KEY($name)"; |
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$this->sql_fields[] = $sql; |
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return $this; |
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} |
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public function foreign_key($name, $reference, $delete) |
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{ |
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$sql = "FOREIGN KEY($name) REFERENCES $reference ON DELETE "; |
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switch ($delete) { |
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case self::DELETE_CASCADE: |
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$sql .= "CASCADE"; |
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break; |
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} |
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$this->sql_fields[] = $sql; |
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return $this; |
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} |
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|
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public function build() |
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{ |
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$sql = array_shift($this->sql_fields); |
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$sql .= implode(',', $this->sql_fields); |
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$sql .= ')'; |
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if ($this->charset_collate) { |
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$sql .= ' ' . $this->charset_collate . ';'; |
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} |
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return $sql; |
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} |
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|
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public function bigint($name, $length = 20, $unsigned = false, $is_nullable = false, $auto_increment = false) |
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{ |
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$sql = $this->_field($name, 'BIGINT', $length, $unsigned, $is_nullable); |
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$sql .= ($auto_increment ? ' AUTO_INCREMENT' : ''); |
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$this->sql_fields[] = $sql; |
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return $this; |
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} |
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public function timestamp($name, $is_nullable = false) |
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{ |
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$sql = $name . ' ' . 'TIMESTAMP '; |
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$sql .= ($is_nullable ? 'NULL' : 'NOT NULL'); |
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$this->sql_fields[] = $sql; |
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return $this; |
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} |
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|
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} |
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|
