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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 WhereStatement extends Statement |
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{ |
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/** |
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* @var bool |
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*/ |
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protected $having; |
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/** |
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* @var array |
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*/ |
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protected $conditions = []; |
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/** |
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* @param bool $having when true, statement becomes a having statement |
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*/ |
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public function __construct($having = false) |
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{ |
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$this->having = $having; |
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} |
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/** |
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* Tells whether this statement is a HAVING statement. |
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* |
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* @return bool true: is HAVING, false: is WHERE |
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*/ |
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public function isHaving() |
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{ |
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return $this->having; |
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} |
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/** |
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* Adds a condition to the statement. |
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* |
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* Accepts the following forms: |
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* 1. Equality comparison: |
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* addCondition('username', 'john') |
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* 2. Comparison with custom operator: |
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* addCondition('balance', 100, '>') |
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* 3. SQL fragment: |
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* addCondition('name LIKE "%john%"') |
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* 4. List of conditions to add: |
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* addCondition([['balance', 100, '>'], ['user_id', 5]]) |
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* 5. Map of equality comparisons: |
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* addCondition(['username' => 'john', 'user_id' => 5]) |
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* 6. List of SQL fragments: |
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* addCondition(['first_name LIKE "%john%"', 'last_name LIKE "%doe%"']) |
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* |
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* @param array|string $field |
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* @param string|bool $value condition value (optional) |
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* @param string $operator operator (optional) |
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* |
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* @return self |
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*/ |
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public function addCondition($field, $value = false, $operator = '=') |
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{ |
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if (is_array($field) && !$value) { |
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foreach ($field as $key => $value) { |
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if (is_array($value)) { // handles #4 |
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call_user_func_array([$this, 'addCondition'], $value); |
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} elseif (!is_numeric($key)) { // handles #5 |
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$this->addCondition($key, $value); |
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} else { // handles #6 |
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$this->addCondition($value); |
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} |
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} |
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} else { |
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// handles #3 |
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$condition = [$field]; |
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// handles #1 and #2 |
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if (func_num_args() >= 2) { |
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$condition[] = $operator; |
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$condition[] = $value; |
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} |
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$this->conditions[] = $condition; |
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} |
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return $this; |
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} |
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/** |
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* Gets the conditions for this statement. |
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* |
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* @return array |
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*/ |
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public function getConditions() |
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{ |
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return $this->conditions; |
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} |
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protected function buildClause(array $clause) |
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{ |
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// handle NULL values |
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if (count($clause) === 3 && $clause[1] === '=' && $clause[2] === null) { |
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return $this->escapeIdentifier($clause[0]).' IS NULL'; |
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} |
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return parent::buildClause($clause); |
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} |
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/** |
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* Generates the raw SQL string for the statement. |
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* |
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* @return string |
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*/ |
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public function build() |
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{ |
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$sql = (!$this->having) ? 'WHERE ' : 'HAVING '; |
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$clauses = []; |
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foreach ($this->conditions as $clause) { |
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$clauses[] = $this->buildClause($clause); |
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} |
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// remove empty values |
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$clauses = array_filter($clauses); |
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if (count($clauses) == 0) { |
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return ''; |
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} |
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return $sql.implode(' AND ', $clauses); |
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} |
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} |
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jaredtking /
jaqb
