1
|
|
|
<?php |
|
|
|
|
2
|
|
|
namespace GV; |
3
|
|
|
|
4
|
|
|
/** If this file is called directly, abort. */ |
5
|
|
|
if ( ! defined( 'GRAVITYVIEW_DIR' ) ) { |
6
|
|
|
die(); |
7
|
|
|
} |
8
|
|
|
|
9
|
|
|
/** |
10
|
|
|
* The \GV\Join class. |
11
|
|
|
* |
12
|
|
|
* Contains a join between two Sources on two Fields. |
13
|
|
|
*/ |
14
|
|
|
class Join { |
15
|
|
|
/** |
16
|
|
|
* Construct a JOIN container. |
17
|
|
|
* |
18
|
|
|
* @param \GV\Source $join The form we're joining to. |
19
|
|
|
* @param \GV\Field $join_column Its column. |
20
|
|
|
* @param \GV\Source $join_on The form we're joining on. |
21
|
|
|
* @param \GV\Field $join_on_column Its column. |
22
|
|
|
* |
23
|
|
|
* @return \GV\Joins $this |
|
|
|
|
24
|
|
|
*/ |
25
|
4 |
|
public function __construct( $join, $join_column, $join_on, $join_on_column ) { |
26
|
4 |
|
if ( $join instanceof \GV\Source ) { |
27
|
4 |
|
$this->join = $join; |
|
|
|
|
28
|
|
|
} |
29
|
|
|
|
30
|
4 |
|
if ( $join_on instanceof \GV\Source ) { |
31
|
4 |
|
$this->join_on = $join_on; |
|
|
|
|
32
|
|
|
} |
33
|
|
|
|
34
|
4 |
|
if ( $join_column instanceof \GV\Field ) { |
35
|
4 |
|
$this->join_column = $join_column; |
|
|
|
|
36
|
|
|
} |
37
|
|
|
|
38
|
4 |
|
if ( $join_on_column instanceof \GV\Field ) { |
39
|
4 |
|
$this->join_on_column = $join_on_column; |
|
|
|
|
40
|
|
|
} |
41
|
4 |
|
} |
42
|
|
|
|
43
|
|
|
/** |
44
|
|
|
* Inject this join into the query. |
45
|
|
|
* |
46
|
|
|
* @param \GF_Query $query The \GF_Query instance. |
47
|
|
|
* |
48
|
|
|
* @return \GF_Query The $query |
49
|
|
|
*/ |
50
|
4 |
|
public function as_query_join( $query ) { |
51
|
4 |
|
|
52
|
|
|
if ( ! gravityview()->plugin->supports( Plugin::FEATURE_JOINS ) ) { |
53
|
|
|
return null; |
54
|
|
|
} |
55
|
4 |
|
|
56
|
4 |
|
if ( ! $query instanceof \GF_Query ) { |
|
|
|
|
57
|
4 |
|
gravityview()->log->error( 'Query not instance of \GF_Query.' ); |
58
|
|
|
return null; |
59
|
|
|
} |
60
|
|
|
|
61
|
|
|
$join_id = intval( $this->join->ID ); |
62
|
|
|
$join_on_id = intval( $this->join_on->ID ); |
63
|
|
|
|
64
|
|
|
if ( empty( $join_id ) || empty( $join_on_id ) ) { |
65
|
|
|
gravityview()->log->error( 'Query join form not an integer.', array( 'data' => $this ) ); |
66
|
|
|
return null; |
67
|
|
|
} |
68
|
|
|
|
69
|
|
|
return $query->join( |
70
|
|
|
new \GF_Query_Column( $this->join_on_column->ID, $join_on_id ), |
|
|
|
|
71
|
|
|
new \GF_Query_Column( $this->join_column->ID, $join_id ) |
72
|
|
|
); |
73
|
|
|
} |
74
|
|
|
} |
75
|
|
|
|
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.