Query/src/QueryBuilder.php

1495 lines
32 KiB
PHP

<?php declare(strict_types=1);
/**
* Query
*
* SQL Query Builder / Database Abstraction Layer
*
* PHP version 7.1
*
* @package Query
* @author Timothy J. Warren <tim@timshomepage.net>
* @copyright 2012 - 2018 Timothy J. Warren
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link https://git.timshomepage.net/aviat4ion/Query
*/
namespace Query;
use BadMethodCallException;
use PDOStatement;
use Query\Drivers\{
AbstractUtil,
DriverInterface,
SQLInterface
};
/**
* Convenience class for creating sql queries
* @method query(mixed $sql): PDOStatement;
*/
class QueryBuilder implements QueryBuilderInterface {
// --------------------------------------------------------------------------
// ! Constants
// --------------------------------------------------------------------------
const KEY = 0;
const VALUE = 1;
const BOTH = 2;
// --------------------------------------------------------------------------
// ! SQL Clause Strings
// --------------------------------------------------------------------------
/**
* Compiled 'select' clause
* @var string
*/
protected $selectString = '';
/**
* Compiled 'from' clause
* @var string
*/
protected $fromString = '';
/**
* Compiled arguments for insert / update
* @var string
*/
protected $setString;
/**
* Order by clause
* @var string
*/
protected $orderString;
/**
* Group by clause
* @var string
*/
protected $groupString;
// --------------------------------------------------------------------------
// ! SQL Clause Arrays
// --------------------------------------------------------------------------
/**
* Keys for insert/update statement
* @var array
*/
protected $setArrayKeys = [];
/**
* Key/val pairs for order by clause
* @var array
*/
protected $orderArray = [];
/**
* Key/val pairs for group by clause
* @var array
*/
protected $groupArray = [];
// --------------------------------------------------------------------------
// ! Other Class vars
// --------------------------------------------------------------------------
/**
* Values to apply to prepared statements
* @var array
*/
protected $values = [];
/**
* Values to apply to where clauses in prepared statements
* @var array
*/
protected $whereValues = [];
/**
* Value for limit string
* @var string
*/
protected $limit;
/**
* Value for offset in limit string
* @var integer
*/
protected $offset;
/**
* Query component order mapping
* for complex select queries
*
* Format:
* array(
* 'type' => 'where',
* 'conjunction' => ' AND ',
* 'string' => 'k=?'
* )
*
* @var array
*/
protected $queryMap = [];
/**
* Map for having clause
* @var array
*/
protected $havingMap;
/**
* Convenience property for connection management
* @var string
*/
public $connName = '';
/**
* List of queries executed
* @var array
*/
public $queries;
/**
* Whether to do only an explain on the query
* @var boolean
*/
protected $explain;
/**
* The current database driver
* @var DriverInterface
*/
public $driver;
/**
* Query parser class instance
* @var QueryParser
*/
protected $parser;
/**
* Alias to driver util class
* @var AbstractUtil
*/
protected $util;
/**
* Alias to driver sql class
* @var SQLInterface
*/
protected $sql;
/**
* String class values to be reset
*
* @var array
*/
private $stringVars = [
'selectString',
'fromString',
'setString',
'orderString',
'groupString',
'limit',
'offset',
'explain',
];
/**
* Array class variables to be reset
*
* @var array
*/
private $arrayVars = [
'setArrayKeys',
'orderArray',
'groupArray',
'values',
'whereValues',
'queryMap',
'havingMap'
];
// --------------------------------------------------------------------------
// ! Methods
// --------------------------------------------------------------------------
/**
* Constructor
*
* @param DriverInterface $driver
* @param QueryParser $parser
*/
public function __construct(DriverInterface $driver, QueryParser $parser)
{
// Inject driver and parser
$this->driver = $driver;
$this->parser = $parser;
$this->queries['total_time'] = 0;
// Alias driver sql and util classes
$this->sql = $this->driver->getSql();
$this->util = $this->driver->getUtil();
}
/**
* Destructor
* @codeCoverageIgnore
*/
public function __destruct()
{
$this->driver = NULL;
}
/**
* Calls a function further down the inheritance chain
*
* @param string $name
* @param array $params
* @return mixed
* @throws BadMethodCallException
*/
public function __call(string $name, array $params)
{
// Alias snake_case method calls
$camelName = \to_camel_case($name);
foreach([$this, $this->driver] as $object)
{
foreach([$name, $camelName] as $methodName)
{
if (method_exists($object, $methodName))
{
return \call_user_func_array([$object, $methodName], $params);
}
}
}
throw new BadMethodCallException('Method does not exist');
}
// --------------------------------------------------------------------------
// ! Driver setters
// --------------------------------------------------------------------------
public function setDriver(DriverInterface $driver)
{
}
// --------------------------------------------------------------------------
// ! Select Queries
// --------------------------------------------------------------------------
/**
* Specifies rows to select in a query
*
* @param string $fields
* @return QueryBuilderInterface
*/
public function select(string $fields): QueryBuilderInterface
{
// Split fields by comma
$fieldsArray = explode(',', $fields);
$fieldsArray = array_map('mb_trim', $fieldsArray);
// Split on 'As'
foreach ($fieldsArray as $key => $field)
{
if (stripos($field, 'as') !== FALSE)
{
$fieldsArray[$key] = preg_split('` as `i', $field);
$fieldsArray[$key] = array_map('mb_trim', $fieldsArray[$key]);
}
}
// Quote the identifiers
$safeArray = $this->driver->quoteIdent($fieldsArray);
unset($fieldsArray);
// Join the strings back together
for($i = 0, $c = count($safeArray); $i < $c; $i++)
{
if (\is_array($safeArray[$i]))
{
$safeArray[$i] = implode(' AS ', $safeArray[$i]);
}
}
$this->selectString .= implode(', ', $safeArray);
unset($safeArray);
return $this;
}
/**
* Selects the maximum value of a field from a query
*
* @param string $field
* @param string|bool $as
* @return QueryBuilderInterface
*/
public function selectMax(string $field, $as=FALSE): QueryBuilderInterface
{
// Create the select string
$this->selectString .= ' MAX'.$this->_select($field, $as);
return $this;
}
/**
* Selects the minimum value of a field from a query
*
* @param string $field
* @param string|bool $as
* @return QueryBuilderInterface
*/
public function selectMin(string $field, $as=FALSE): QueryBuilderInterface
{
// Create the select string
$this->selectString .= ' MIN'.$this->_select($field, $as);
return $this;
}
/**
* Selects the average value of a field from a query
*
* @param string $field
* @param string|bool $as
* @return QueryBuilderInterface
*/
public function selectAvg(string $field, $as=FALSE): QueryBuilderInterface
{
// Create the select string
$this->selectString .= ' AVG'.$this->_select($field, $as);
return $this;
}
/**
* Selects the sum of a field from a query
*
* @param string $field
* @param string|bool $as
* @return QueryBuilderInterface
*/
public function selectSum(string $field, $as=FALSE): QueryBuilderInterface
{
// Create the select string
$this->selectString .= ' SUM'.$this->_select($field, $as);
return $this;
}
/**
* Adds the 'distinct' keyword to a query
*
* @return QueryBuilderInterface
*/
public function distinct(): QueryBuilderInterface
{
// Prepend the keyword to the select string
$this->selectString = ' DISTINCT '.$this->selectString;
return $this;
}
/**
* Tell the database to give you the query plan instead of result set
*
* @return QueryBuilderInterface
*/
public function explain(): QueryBuilderInterface
{
$this->explain = TRUE;
return $this;
}
/**
* Specify the database table to select from
*
* @param string $tblname
* @return QueryBuilderInterface
*/
public function from($tblname): QueryBuilderInterface
{
// Split identifiers on spaces
$identArray = explode(' ', \mb_trim($tblname));
$identArray = array_map('\\mb_trim', $identArray);
// Quote the identifiers
$identArray[0] = $this->driver->quoteTable($identArray[0]);
$identArray = $this->driver->quoteIdent($identArray);
// Paste it back together
$this->fromString = implode(' ', $identArray);
return $this;
}
// --------------------------------------------------------------------------
// ! 'Like' methods
// --------------------------------------------------------------------------
/**
* Creates a Like clause in the sql statement
*
* @param string $field
* @param mixed $val
* @param string $pos
* @return QueryBuilderInterface
*/
public function like($field, $val, $pos='both'): QueryBuilderInterface
{
return $this->_like($field, $val, $pos, 'LIKE', 'AND');
}
/**
* Generates an OR Like clause
*
* @param string $field
* @param mixed $val
* @param string $pos
* @return QueryBuilderInterface
*/
public function orLike($field, $val, $pos='both'): QueryBuilderInterface
{
return $this->_like($field, $val, $pos, 'LIKE', 'OR');
}
/**
* Generates a NOT LIKE clause
*
* @param string $field
* @param mixed $val
* @param string $pos
* @return QueryBuilderInterface
*/
public function notLike($field, $val, $pos='both'): QueryBuilderInterface
{
return $this->_like($field, $val, $pos, 'NOT LIKE', 'AND');
}
/**
* Generates a OR NOT LIKE clause
*
* @param string $field
* @param mixed $val
* @param string $pos
* @return QueryBuilderInterface
*/
public function orNotLike($field, $val, $pos='both'): QueryBuilderInterface
{
return $this->_like($field, $val, $pos, 'NOT LIKE', 'OR');
}
// --------------------------------------------------------------------------
// ! Having methods
// --------------------------------------------------------------------------
/**
* Generates a 'Having' clause
*
* @param mixed $key
* @param mixed $val
* @return QueryBuilderInterface
*/
public function having($key, $val=[]): QueryBuilderInterface
{
return $this->_having($key, $val, 'AND');
}
/**
* Generates a 'Having' clause prefixed with 'OR'
*
* @param mixed $key
* @param mixed $val
* @return QueryBuilderInterface
*/
public function orHaving($key, $val=[]): QueryBuilderInterface
{
return $this->_having($key, $val, 'OR');
}
// --------------------------------------------------------------------------
// ! 'Where' methods
// --------------------------------------------------------------------------
/**
* Specify condition(s) in the where clause of a query
* Note: this function works with key / value, or a
* passed array with key / value pairs
*
* @param mixed $key
* @param mixed $val
* @param mixed $escape
* @return QueryBuilderInterface
*/
public function where($key, $val=[], $escape=NULL): QueryBuilderInterface
{
return $this->_whereString($key, $val, 'AND');
}
/**
* Where clause prefixed with "OR"
*
* @param string $key
* @param mixed $val
* @return QueryBuilderInterface
*/
public function orWhere($key, $val=[]): QueryBuilderInterface
{
return $this->_whereString($key, $val, 'OR');
}
/**
* Where clause with 'IN' statement
*
* @param mixed $field
* @param mixed $val
* @return QueryBuilderInterface
*/
public function whereIn($field, $val=[]): QueryBuilderInterface
{
return $this->_whereIn($field, $val);
}
/**
* Where in statement prefixed with "or"
*
* @param string $field
* @param mixed $val
* @return QueryBuilderInterface
*/
public function orWhereIn($field, $val=[]): QueryBuilderInterface
{
return $this->_whereIn($field, $val, 'IN', 'OR');
}
/**
* WHERE NOT IN (FOO) clause
*
* @param string $field
* @param mixed $val
* @return QueryBuilderInterface
*/
public function whereNotIn($field, $val=[]): QueryBuilderInterface
{
return $this->_whereIn($field, $val, 'NOT IN', 'AND');
}
/**
* OR WHERE NOT IN (FOO) clause
*
* @param string $field
* @param mixed $val
* @return QueryBuilderInterface
*/
public function orWhereNotIn($field, $val=[]): QueryBuilderInterface
{
return $this->_whereIn($field, $val, 'NOT IN', 'OR');
}
// --------------------------------------------------------------------------
// ! Other Query Modifier methods
// --------------------------------------------------------------------------
/**
* Sets values for inserts / updates / deletes
*
* @param mixed $key
* @param mixed $val
* @return QueryBuilderInterface
*/
public function set($key, $val = NULL): QueryBuilderInterface
{
$this->_mixedSet($this->setArrayKeys, $key, $val, self::KEY);
$this->_mixedSet($this->values, $key, $val, self::VALUE);
// Use the keys of the array to make the insert/update string
// Escape the field names
$this->setArrayKeys = array_map([$this->driver, '_quote'], $this->setArrayKeys);
// Generate the "set" string
$this->setString = implode('=?,', $this->setArrayKeys);
$this->setString .= '=?';
return $this;
}
/**
* Creates a join phrase in a compiled query
*
* @param string $table
* @param string $condition
* @param string $type
* @return QueryBuilderInterface
*/
public function join($table, $condition, $type=''): QueryBuilderInterface
{
// Prefix and quote table name
$table = explode(' ', mb_trim($table));
$table[0] = $this->driver->quoteTable($table[0]);
$table = $this->driver->quoteIdent($table);
$table = implode(' ', $table);
// Parse out the join condition
$parsedCondition = $this->parser->compileJoin($condition);
$condition = $table . ' ON ' . $parsedCondition;
$this->_appendMap("\n" . strtoupper($type) . ' JOIN ', $condition, 'join');
return $this;
}
/**
* Group the results by the selected field(s)
*
* @param mixed $field
* @return QueryBuilderInterface
*/
public function groupBy($field): QueryBuilderInterface
{
if ( ! is_scalar($field))
{
$newGroupArray = array_map([$this->driver, 'quoteIdent'], $field);
$this->groupArray = array_merge($this->groupArray, $newGroupArray);
}
else
{
$this->groupArray[] = $this->driver->quoteIdent($field);
}
$this->groupString = ' GROUP BY ' . implode(',', $this->groupArray);
return $this;
}
/**
* Order the results by the selected field(s)
*
* @param string $field
* @param string $type
* @return QueryBuilderInterface
*/
public function orderBy($field, $type=''): QueryBuilderInterface
{
// When ordering by random, do an ascending order if the driver
// doesn't support random ordering
if (stripos($type, 'rand') !== FALSE)
{
$rand = $this->sql->random();
$type = $rand ?? 'ASC';
}
// Set fields for later manipulation
$field = $this->driver->quoteIdent($field);
$this->orderArray[$field] = $type;
$orderClauses = [];
// Flatten key/val pairs into an array of space-separated pairs
foreach($this->orderArray as $k => $v)
{
$orderClauses[] = $k . ' ' . strtoupper($v);
}
// Set the final string
$this->orderString = ( ! isset($rand))
? "\nORDER BY ".implode(', ', $orderClauses)
: "\nORDER BY".$rand;
return $this;
}
/**
* Set a limit on the current sql statement
*
* @param int $limit
* @param int|bool $offset
* @return QueryBuilderInterface
*/
public function limit($limit, $offset=FALSE): QueryBuilderInterface
{
$this->limit = (int) $limit;
$this->offset = $offset;
return $this;
}
// --------------------------------------------------------------------------
// ! Query Grouping Methods
// --------------------------------------------------------------------------
/**
* Adds a paren to the current query for query grouping
*
* @return QueryBuilderInterface
*/
public function groupStart(): QueryBuilderInterface
{
$conj = empty($this->queryMap) ? ' WHERE ' : ' ';
$this->_appendMap($conj, '(', 'group_start');
return $this;
}
/**
* Adds a paren to the current query for query grouping,
* prefixed with 'NOT'
*
* @return QueryBuilderInterface
*/
public function notGroupStart(): QueryBuilderInterface
{
$conj = empty($this->queryMap) ? ' WHERE ' : ' AND ';
$this->_appendMap($conj, ' NOT (', 'group_start');
return $this;
}
/**
* Adds a paren to the current query for query grouping,
* prefixed with 'OR'
*
* @return QueryBuilderInterface
*/
public function orGroupStart(): QueryBuilderInterface
{
$this->_appendMap('', ' OR (', 'group_start');
return $this;
}
/**
* Adds a paren to the current query for query grouping,
* prefixed with 'OR NOT'
*
* @return QueryBuilderInterface
*/
public function orNotGroupStart(): QueryBuilderInterface
{
$this->_appendMap('', ' OR NOT (', 'group_start');
return $this;
}
/**
* Ends a query group
*
* @return QueryBuilderInterface
*/
public function groupEnd(): QueryBuilderInterface
{
$this->_appendMap('', ')', 'group_end');
return $this;
}
// --------------------------------------------------------------------------
// ! Query execution methods
// --------------------------------------------------------------------------
/**
* Select and retrieve all records from the current table, and/or
* execute current compiled query
*
* @param string $table
* @param int|bool $limit
* @param int|bool $offset
* @return PDOStatement
*/
public function get($table='', $limit=FALSE, $offset=FALSE): PDOStatement
{
// Set the table
if ( ! empty($table))
{
$this->from($table);
}
// Set the limit, if it exists
if (\is_int($limit))
{
$this->limit($limit, $offset);
}
return $this->_run('get', $table);
}
/**
* Convenience method for get() with a where clause
*
* @param string $table
* @param array $where
* @param int|bool $limit
* @param int|bool $offset
* @return PDOStatement
*/
public function getWhere($table, $where=[], $limit=FALSE, $offset=FALSE): PDOStatement
{
// Create the where clause
$this->where($where);
// Return the result
return $this->get($table, $limit, $offset);
}
/**
* Retrieve the number of rows in the selected table
*
* @param string $table
* @return int
*/
public function countAll($table): int
{
$sql = 'SELECT * FROM '.$this->driver->quoteTable($table);
$res = $this->driver->query($sql);
return (int) count($res->fetchAll());
}
/**
* Retrieve the number of results for the generated query - used
* in place of the get() method
*
* @param string $table
* @param boolean $reset
* @return int
*/
public function countAllResults(string $table='', bool $reset = TRUE): int
{
// Set the table
if ( ! empty($table))
{
$this->from($table);
}
$result = $this->_run('get', $table, NULL, NULL, $reset);
$rows = $result->fetchAll();
return (int) count($rows);
}
/**
* Creates an insert clause, and executes it
*
* @param string $table
* @param mixed $data
* @return PDOStatement
*/
public function insert($table, $data=[]): PDOStatement
{
if ( ! empty($data))
{
$this->set($data);
}
return $this->_run('insert', $table);
}
/**
* Creates and executes a batch insertion query
*
* @param string $table
* @param array $data
* @return PDOStatement
*/
public function insertBatch($table, $data=[]): PDOStatement
{
// Get the generated values and sql string
list($sql, $data) = $this->driver->insertBatch($table, $data);
return ( ! is_null($sql))
? $this->_run('', $table, $sql, $data)
: NULL;
}
/**
* Creates an update clause, and executes it
*
* @param string $table
* @param mixed $data
* @return PDOStatement
*/
public function update($table, $data=[]): PDOStatement
{
if ( ! empty($data))
{
$this->set($data);
}
return $this->_run('update', $table);
}
/**
* Creates a batch update, and executes it.
* Returns the number of affected rows
*
* @param string $table
* @param array|object $data
* @param string $where
* @return int|null
*/
public function updateBatch($table, $data, $where)
{
// Get the generated values and sql string
list($sql, $data) = $this->driver->updateBatch($table, $data, $where);
return ( ! is_null($sql))
? $this->_run('', $table, $sql, $data)
: NULL;
}
/**
* Insertion with automatic overwrite, rather than attempted duplication
*
* @param string $table
* @param array $data
* @return \PDOStatement|null
*/
public function replace($table, $data=[])
{
if ( ! empty($data))
{
$this->set($data);
}
return $this->_run('replace', $table);
}
/**
* Deletes data from a table
*
* @param string $table
* @param mixed $where
* @return PDOStatement
*/
public function delete($table, $where=''): PDOStatement
{
// Set the where clause
if ( ! empty($where))
{
$this->where($where);
}
return $this->_run('delete', $table);
}
// --------------------------------------------------------------------------
// ! SQL Returning Methods
// --------------------------------------------------------------------------
/**
* Returns the generated 'select' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
public function getCompiledSelect(string $table='', bool $reset=TRUE): string
{
// Set the table
if ( ! empty($table))
{
$this->from($table);
}
return $this->_getCompile('select', $table, $reset);
}
/**
* Returns the generated 'insert' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
public function getCompiledInsert(string $table, bool $reset=TRUE): string
{
return $this->_getCompile('insert', $table, $reset);
}
/**
* Returns the generated 'update' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
public function getCompiledUpdate(string $table='', bool $reset=TRUE): string
{
return $this->_getCompile('update', $table, $reset);
}
/**
* Returns the generated 'delete' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
public function getCompiledDelete(string $table='', bool $reset=TRUE): string
{
return $this->_getCompile('delete', $table, $reset);
}
// --------------------------------------------------------------------------
// ! Miscellaneous Methods
// --------------------------------------------------------------------------
/**
* Clear out the class variables, so the next query can be run
*
* @return void
*/
public function resetQuery(): void
{
// Reset strings and booleans
foreach($this->stringVars as $var)
{
$this->$var = NULL;
}
// Reset arrays
foreach($this->arrayVars as $var)
{
$this->$var = [];
}
}
/**
* Set values in the class, with either an array or key value pair
*
* @param array $var
* @param mixed $key
* @param mixed $val
* @param int $valType
* @return array
*/
protected function _mixedSet(array &$var, $key, $val=NULL, int $valType=self::BOTH): array
{
$arg = (is_scalar($key) && is_scalar($val))
? [$key => $val]
: $key;
foreach($arg as $k => $v)
{
if (\in_array($valType, [self::KEY, self::VALUE], TRUE))
{
$var[] = ($valType === self::KEY)
? $k
: $v;
}
else
{
$var[$k] = $v;
}
}
return $var;
}
/**
* Method to simplify select_ methods
*
* @param string $field
* @param string|bool $as
* @return string
*/
protected function _select(string $field, $as = FALSE): string
{
// Escape the identifiers
$field = $this->driver->quoteIdent($field);
if ( ! \is_string($as))
{
return $field;
}
$as = $this->driver->quoteIdent($as);
return "({$field}) AS {$as} ";
}
/**
* Helper function for returning sql strings
*
* @param string $type
* @param string $table
* @param bool $reset
* @return string
*/
protected function _getCompile(string $type, string $table, bool $reset): string
{
$sql = $this->_compile($type, $table);
// Reset the query builder for the next query
if ($reset)
{
$this->resetQuery();
}
return $sql;
}
/**
* Simplify 'like' methods
*
* @param string $field
* @param mixed $val
* @param string $pos
* @param string $like
* @param string $conj
* @return self
*/
protected function _like(string $field, $val, string $pos, string $like='LIKE', string $conj='AND'): self
{
$field = $this->driver->quoteIdent($field);
// Add the like string into the order map
$like = $field. " {$like} ?";
if ($pos === 'before')
{
$val = "%{$val}";
}
elseif ($pos === 'after')
{
$val = "{$val}%";
}
else
{
$val = "%{$val}%";
}
$conj = empty($this->queryMap) ? ' WHERE ' : " {$conj} ";
$this->_appendMap($conj, $like, 'like');
// Add to the values array
$this->whereValues[] = $val;
return $this;
}
/**
* Simplify building having clauses
*
* @param mixed $key
* @param mixed $values
* @param string $conj
* @return self
*/
protected function _having($key, $values=[], string $conj='AND'): self
{
$where = $this->_where($key, $values);
// Create key/value placeholders
foreach($where as $f => $val)
{
// Split each key by spaces, in case there
// is an operator such as >, <, !=, etc.
$fArray = explode(' ', trim($f));
$item = $this->driver->quoteIdent($fArray[0]);
// Simple key value, or an operator
$item .= (count($fArray) === 1) ? '=?' : " {$fArray[1]} ?";
// Put in the having map
$this->havingMap[] = [
'conjunction' => ( ! empty($this->havingMap)) ? " {$conj} " : ' HAVING ',
'string' => $item
];
}
return $this;
}
/**
* Do all the redundant stuff for where/having type methods
*
* @param mixed $key
* @param mixed $val
* @return array
*/
protected function _where($key, $val=[]): array
{
$where = [];
$this->_mixedSet($where, $key, $val);
$this->_mixedSet($this->whereValues, $key, $val, self::VALUE);
return $where;
}
/**
* Simplify generating where string
*
* @param mixed $key
* @param mixed $values
* @param string $defaultConj
* @return self
*/
protected function _whereString($key, $values=[], string $defaultConj='AND'): self
{
// Create key/value placeholders
foreach($this->_where($key, $values) as $f => $val)
{
// Split each key by spaces, in case there
// is an operator such as >, <, !=, etc.
$fArray = explode(' ', trim($f));
$item = $this->driver->quoteIdent($fArray[0]);
// Simple key value, or an operator
$item .= (count($fArray) === 1) ? '=?' : " {$fArray[1]} ?";
$lastItem = end($this->queryMap);
// Determine the correct conjunction
$conjunctionList = array_column($this->queryMap, 'conjunction');
if (empty($this->queryMap) || ( ! regex_in_array($conjunctionList, "/^ ?\n?WHERE/i")))
{
$conj = "\nWHERE ";
}
elseif ($lastItem['type'] === 'group_start')
{
$conj = '';
}
else
{
$conj = " {$defaultConj} ";
}
$this->_appendMap($conj, $item, 'where');
}
return $this;
}
/**
* Simplify where_in methods
*
* @param mixed $key
* @param mixed $val
* @param string $in - The (not) in fragment
* @param string $conj - The where in conjunction
* @return self
*/
protected function _whereIn($key, $val=[], string $in='IN', string $conj='AND'): self
{
$key = $this->driver->quoteIdent($key);
$params = array_fill(0, count($val), '?');
foreach($val as $v)
{
$this->whereValues[] = $v;
}
$conjunction = ( ! empty($this->queryMap)) ? " {$conj} " : ' WHERE ';
$str = $key . " {$in} (".implode(',', $params).') ';
$this->_appendMap($conjunction, $str, 'where_in');
return $this;
}
/**
* Executes the compiled query
*
* @param string $type
* @param string $table
* @param string $sql
* @param array|null $vals
* @param boolean $reset
* @return PDOStatement
*/
protected function _run(string $type, string $table, $sql=NULL, $vals=NULL, bool $reset=TRUE): PDOStatement
{
if ($sql === NULL)
{
$sql = $this->_compile($type, $table);
}
if ($vals === NULL)
{
$vals = array_merge($this->values, (array) $this->whereValues);
}
$startTime = microtime(TRUE);
$res = empty($vals)
? $this->driver->query($sql)
: $this->driver->prepareExecute($sql, $vals);
$endTime = microtime(TRUE);
$totalTime = number_format($endTime - $startTime, 5);
// Add this query to the list of executed queries
$this->_appendQuery($vals, $sql, (int) $totalTime);
// Reset class state for next query
if ($reset)
{
$this->resetQuery();
}
return $res;
}
/**
* Add an additional set of mapping pairs to a internal map
*
* @param string $conjunction
* @param string $string
* @param string $type
* @return void
*/
protected function _appendMap(string $conjunction = '', string $string = '', string $type = '')
{
$this->queryMap[] = [
'type' => $type,
'conjunction' => $conjunction,
'string' => $string
];
}
/**
* Convert the prepared statement into readable sql
*
* @param array $vals
* @param string $sql
* @param int $totalTime
* @return void
*/
protected function _appendQuery($vals, string $sql, int $totalTime)
{
$evals = \is_array($vals) ? $vals : [];
$esql = str_replace('?', "%s", $sql);
// Quote string values
foreach($evals as &$v)
{
$v = ( ! is_numeric($v))
? htmlentities($this->driver->quote($v), ENT_NOQUOTES, 'utf-8')
: $v;
}
// Add the query onto the array of values to pass
// as arguments to sprintf
array_unshift($evals, $esql);
// Add the interpreted query to the list of executed queries
$this->queries[] = [
'time' => $totalTime,
'sql' => sprintf(...$evals)
];
$this->queries['total_time'] += $totalTime;
// Set the last query to get rowcounts properly
$this->driver->setLastQuery($sql);
}
/**
* Sub-method for generating sql strings
*
* @param string $type
* @param string $table
* @return string
*/
protected function _compileType(string $type='', string $table=''): string
{
switch($type)
{
case 'insert':
$paramCount = count($this->setArrayKeys);
$params = array_fill(0, $paramCount, '?');
$sql = "INSERT INTO {$table} ("
. implode(',', $this->setArrayKeys)
. ")\nVALUES (".implode(',', $params).')';
break;
case 'update':
$sql = "UPDATE {$table}\nSET {$this->setString}";
break;
case 'replace':
// @TODO implement
$sql = '';
break;
case 'delete':
$sql = "DELETE FROM {$table}";
break;
// Get queries
default:
$sql = "SELECT * \nFROM {$this->fromString}";
// Set the select string
if ( ! empty($this->selectString))
{
// Replace the star with the selected fields
$sql = str_replace('*', $this->selectString, $sql);
}
break;
}
return $sql;
}
/**
* String together the sql statements for sending to the db
*
* @param string $type
* @param string $table
* @return string
*/
protected function _compile(string $type='', string $table=''): string
{
// Get the base clause for the query
$sql = $this->_compileType($type, $this->driver->quoteTable($table));
$clauses = [
'queryMap',
'groupString',
'orderString',
'havingMap',
];
// Set each type of subclause
foreach($clauses as $clause)
{
$param = $this->$clause;
if (\is_array($param))
{
foreach($param as $q)
{
$sql .= $q['conjunction'] . $q['string'];
}
}
else
{
$sql .= $param;
}
}
// Set the limit via the class variables
if (is_numeric($this->limit))
{
$sql = $this->sql->limit($sql, $this->limit, $this->offset);
}
// See if the query plan, rather than the
// query data should be returned
if ($this->explain === TRUE)
{
$sql = $this->sql->explain($sql);
}
return $sql;
}
}