1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Feed\Reader\Extension\Syndication;
use DateTime;
use Zend\Feed\Reader;
use Zend\Feed\Reader\Extension;
class Feed extends Extension\AbstractFeed
{
/**
* Get update period
*
* @return string
* @throws Reader\Exception\InvalidArgumentException
*/
public function getUpdatePeriod()
{
$name = 'updatePeriod';
$period = $this->getData($name);
if ($period === null) {
$this->data[$name] = 'daily';
return 'daily'; //Default specified by spec
}
switch ($period) {
case 'hourly':
case 'daily':
case 'weekly':
case 'yearly':
return $period;
default:
throw new Reader\Exception\InvalidArgumentException("Feed specified invalid update period: '$period'."
. " Must be one of hourly, daily, weekly or yearly");
}
}
/**
* Get update frequency
*
* @return int
*/
public function getUpdateFrequency()
{
$name = 'updateFrequency';
$freq = $this->getData($name, 'number');
if (! $freq || $freq < 1) {
$this->data[$name] = 1;
return 1;
}
return $freq;
}
/**
* Get update frequency as ticks
*
* @return int
*/
public function getUpdateFrequencyAsTicks()
{
$name = 'updateFrequency';
$freq = $this->getData($name, 'number');
if (! $freq || $freq < 1) {
$this->data[$name] = 1;
$freq = 1;
}
$period = $this->getUpdatePeriod();
$ticks = 1;
switch ($period) {
case 'yearly':
$ticks *= 52; //TODO: fix generalisation, how?
// no break
case 'weekly':
$ticks *= 7;
// no break
case 'daily':
$ticks *= 24;
// no break
case 'hourly':
$ticks *= 3600;
break;
default: //Never arrive here, exception thrown in getPeriod()
break;
}
return $ticks / $freq;
}
/**
* Get update base
*
* @return DateTime|null
*/
public function getUpdateBase()
{
$updateBase = $this->getData('updateBase');
$date = null;
if ($updateBase) {
$date = DateTime::createFromFormat(DateTime::W3C, $updateBase);
}
return $date;
}
/**
* Get the entry data specified by name
*
* @param string $name
* @param string $type
* @return mixed|null
*/
private function getData($name, $type = 'string')
{
if (array_key_exists($name, $this->data)) {
return $this->data[$name];
}
$data = $this->xpath->evaluate($type . '(' . $this->getXpathPrefix() . '/syn10:' . $name . ')');
if (! $data) {
$data = null;
}
$this->data[$name] = $data;
return $data;
}
/**
* Register Syndication namespaces
*
* @return void
*/
protected function registerNamespaces()
{
$this->xpath->registerNamespace('syn10', 'http://purl.org/rss/1.0/modules/syndication/');
}
}