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<?php
declare
(strict_types=
1
);
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
* @link https://cakephp.org CakePHP(tm) Project
* @since 3.0.0
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
namespace
Cake
\
Database
\
Expression
;
use
Cake
\
Database
\
ExpressionInterface
;
use
Cake
\
Database
\
ValueBinder
;
use
Closure
;
use
InvalidArgumentException
;
/**
* This expression represents SQL fragments that are used for comparing one tuple
* to another, one tuple to a set of other tuples or one tuple to an expression
*/
class
TupleComparison
extends
ComparisonExpression
{
/**
* The type to be used for casting the value to a database representation
*
* @var array<string|null>
*/
protected
array
$
types
;
/**
* Constructor
*
* @param \Cake\Database\ExpressionInterface|array|string $fields the fields to use to form a tuple
* @param \Cake\Database\ExpressionInterface|array $values the values to use to form a tuple
* @param array<string|null> $types the types names to use for casting each of the values, only
* one type per position in the value array in needed
* @param string $conjunction the operator used for comparing field and value
*/
public
function
__construct
(
ExpressionInterface
|
array
|
string
$
fields
,
ExpressionInterface
|
array
$
values
,
array
$
types
= [],
string
$
conjunction
=
'
=
'
,
) {
$
this
->
types
=
$
types
;
$
this
->
setField
(
$
fields
);
$
this
->
_operator
=
$
conjunction
;
$
this
->
setValue
(
$
values
);
}
/**
* Returns the type to be used for casting the value to a database representation
*
* @return array<string|null>
*/
public
function
getType
():
array
{
return
$
this
->
types
;
}
/**
* Sets the value
*
* @param mixed $value The value to compare
* @return void
*/
public
function
setValue
(
mixed
$
value
):
void
{
if
(
$
this
->
isMulti
()) {
if
(
is_array
(
$
value
) && !
is_array
(
current
(
$
value
))) {
throw
new
InvalidArgumentException
(
'
Multi-tuple comparisons require a multi-tuple value, single-tuple given.
'
,
);
}
}
elseif
(
is_array
(
$
value
) &&
is_array
(
current
(
$
value
))) {
throw
new
InvalidArgumentException
(
'
Single-tuple comparisons require a single-tuple value, multi-tuple given.
'
,
);
}
$
this
->
_value
=
$
value
;
}
/**
* @inheritDoc
*/
public
function
sql
(
ValueBinder
$
binder
):
string
{
$
template
=
'
(%s) %s (%s)
'
;
$
fields
= [];
$
originalFields
=
$
this
->
getField
();
if
(!
is_array
(
$
originalFields
)) {
$
originalFields
= [
$
originalFields
];
}
foreach
(
$
originalFields
as
$
field
) {
$
fields
[] =
$
field
instanceof
ExpressionInterface ?
$
field
->
sql
(
$
binder
) :
$
field
;
}
$
values
=
$
this
->
_stringifyValues
(
$
binder
);
$
field
=
implode
(
'
,
'
,
$
fields
);
return
sprintf
(
$
template
,
$
field
,
$
this
->
_operator
,
$
values
);
}
/**
* Returns a string with the values as placeholders in a string to be used
* for the SQL version of this expression
*
* @param \Cake\Database\ValueBinder $binder The value binder to convert expressions with.
* @return string
*/
protected
function
_stringifyValues
(
ValueBinder
$
binder
):
string
{
$
values
= [];
$
parts
=
$
this
->
getValue
();
if
(
$
parts
instanceof
ExpressionInterface) {
return
$
parts
->
sql
(
$
binder
);
}
foreach
(
$
parts
as
$
i
=>
$
value
) {
if
(
$
value
instanceof
ExpressionInterface) {
$
values
[] =
$
value
->
sql
(
$
binder
);
continue
;
}
$
type
=
$
this
->
types
;
$
isMultiOperation
=
$
this
->
isMulti
();
if
(!
$
type
) {
$
type
=
null
;
}
if
(
$
isMultiOperation
) {
$
bound
= [];
foreach
(
$
value
as
$
k
=>
$
val
) {
$
valType
=
$
type
&&
isset
(
$
type
[
$
k
]) ?
$
type
[
$
k
] :
$
type
;
assert
(
$
valType
===
null
||
is_scalar
(
$
valType
));
$
bound
[] =
$
this
->
_bindValue
(
$
val
,
$
binder
,
$
valType
);
}
$
values
[] =
sprintf
(
'
(%s)
'
,
implode
(
'
,
'
,
$
bound
));
continue
;
}
$
valType
=
$
type
&&
isset
(
$
type
[
$
i
]) ?
$
type
[
$
i
] :
$
type
;
assert
(
$
valType
===
null
||
is_scalar
(
$
valType
));
$
values
[] =
$
this
->
_bindValue
(
$
value
,
$
binder
,
$
valType
);
}
return
implode
(
'
,
'
,
$
values
);
}
/**
* @inheritDoc
*/
protected
function
_bindValue
(
mixed
$
value
,
ValueBinder
$
binder
, ?
string
$
type
=
null
):
string
{
$
placeholder
=
$
binder
->
placeholder
(
'
tuple
'
);
$
binder
->
bind
(
$
placeholder
,
$
value
,
$
type
);
return
$
placeholder
;
}
/**
* @inheritDoc
*/
public
function
traverse
(
Closure
$
callback
)
{
$
fields
= (
array
)
$
this
->
getField
();
foreach
(
$
fields
as
$
field
) {
$
this
->
_traverseValue
(
$
field
,
$
callback
);
}
$
value
=
$
this
->
getValue
();
if
(
$
value
instanceof
ExpressionInterface) {
$
callback
(
$
value
);
$
value
->
traverse
(
$
callback
);
return
$
this
;
}
foreach
(
$
value
as
$
val
) {
if
(
$
this
->
isMulti
()) {
foreach
(
$
val
as
$
v
) {
$
this
->
_traverseValue
(
$
v
,
$
callback
);
}
}
else
{
$
this
->
_traverseValue
(
$
val
,
$
callback
);
}
}
return
$
this
;
}
/**
* Conditionally executes the callback for the passed value if
* it is an ExpressionInterface
*
* @param mixed $value The value to traverse
* @param \Closure $callback The callback to use when traversing
* @return void
*/
protected
function
_traverseValue
(
mixed
$
value
,
Closure
$
callback
):
void
{
if
(
$
value
instanceof
ExpressionInterface) {
$
callback
(
$
value
);
$
value
->
traverse
(
$
callback
);
}
}
/**
* Determines if each of the values in this expressions is a tuple in
* itself
*
* @return bool
*/
public
function
isMulti
():
bool
{
return
in_array
(
strtolower
(
$
this
->
_operator
), [
'
in
'
,
'
not in
'
],
true
);
}
}
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