1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
namespace iio\libmergepdf; |
4
|
|
|
|
5
|
|
|
/** |
6
|
|
|
* Parse page numbers from string |
7
|
|
|
*/ |
8
|
|
|
class Pages implements \IteratorAggregate |
9
|
|
|
{ |
10
|
|
|
/** |
11
|
|
|
* @var integer[] Added integer page numbers |
12
|
|
|
*/ |
13
|
|
|
private $pages = []; |
14
|
|
|
|
15
|
|
|
/** |
16
|
|
|
* Constructor |
17
|
|
|
* |
18
|
|
|
* Pages should be formatted as 1,3,6 or 12-16 or combined. Note that pages |
19
|
|
|
* are merged in the order that you provide them. If you put pages 12-14 |
20
|
|
|
* before 1-5 then 12-14 will be placed first. |
21
|
|
|
* |
22
|
|
|
* @param string $expressionString |
23
|
|
|
* @throws Exception If unable to parse page numbers |
24
|
|
|
*/ |
25
|
|
|
public function __construct($expressionString = '') |
26
|
|
|
{ |
27
|
|
|
$expressions = explode( |
28
|
|
|
',', |
29
|
|
|
str_replace(' ', '', $expressionString) |
30
|
|
|
); |
31
|
|
|
|
32
|
|
|
foreach ($expressions as $expr) { |
33
|
|
|
if (empty($expr)) { |
34
|
|
|
continue; |
35
|
|
|
} |
36
|
|
|
if (ctype_digit($expr)) { |
37
|
|
|
$this->addPage($expr); |
38
|
|
|
continue; |
39
|
|
|
} |
40
|
|
|
if (preg_match("/^(\d+)-(\d+)/", $expr, $matches)) { |
41
|
|
|
$this->addRange($matches[1], $matches[2]); |
42
|
|
|
continue; |
43
|
|
|
} |
44
|
|
|
throw new Exception("Invalid page number(s) for expression '$expr'"); |
45
|
|
|
} |
46
|
|
|
} |
47
|
|
|
|
48
|
|
|
/** |
49
|
|
|
* Add page to collection |
50
|
|
|
* |
51
|
|
|
* @param int|string $page |
52
|
|
|
* @return void |
53
|
|
|
*/ |
54
|
|
|
public function addPage($page) |
55
|
|
|
{ |
56
|
|
|
assert('is_numeric($page)'); |
57
|
|
|
$this->pages[] = intval($page); |
58
|
|
|
} |
59
|
|
|
|
60
|
|
|
/** |
61
|
|
|
* Add range of pages |
62
|
|
|
* |
63
|
|
|
* @param int|string $start |
64
|
|
|
* @param int|string $end |
65
|
|
|
* @return void |
66
|
|
|
*/ |
67
|
|
|
public function addRange($start, $end) |
68
|
|
|
{ |
69
|
|
|
assert('is_numeric($start)'); |
70
|
|
|
assert('is_numeric($end)'); |
71
|
|
|
$this->pages = array_merge($this->pages, range($start, $end)); |
|
|
|
|
72
|
|
|
} |
73
|
|
|
|
74
|
|
|
/** |
75
|
|
|
* Get array of integer page numbers |
76
|
|
|
* |
77
|
|
|
* @return integer[] |
78
|
|
|
*/ |
79
|
|
|
public function getPages() |
80
|
|
|
{ |
81
|
|
|
return $this->pages; |
82
|
|
|
} |
83
|
|
|
|
84
|
|
|
/** |
85
|
|
|
* Get iterator of page numbers |
86
|
|
|
*/ |
87
|
|
|
public function getIterator() |
88
|
|
|
{ |
89
|
|
|
return new \ArrayIterator($this->getPages()); |
90
|
|
|
} |
91
|
|
|
|
92
|
|
|
/** |
93
|
|
|
* Check if pages has been sprcified |
94
|
|
|
* |
95
|
|
|
* @return boolean |
96
|
|
|
*/ |
97
|
|
|
public function hasPages() |
98
|
|
|
{ |
99
|
|
|
return !empty($this->getPages()); |
100
|
|
|
} |
101
|
|
|
} |
102
|
|
|
|
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..