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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
<?php
class FilterBridge extends FeedExpander
{
const MAINTAINER = 'Frenzie, ORelio';
const NAME = 'Filter';
const CACHE_TIMEOUT = 3600; // 1h
const DESCRIPTION = 'Filters a feed of your choice';
const URI = 'https://github.com/RSS-Bridge/rss-bridge';
const PARAMETERS = [[
'url' => [
'name' => 'Feed URL',
'type' => 'text',
'exampleValue' => 'https://lorem-rss.herokuapp.com/feed?unit=day',
'required' => true,
],
'name' => [
'name' => 'Feed name (optional)',
'type' => 'text',
'exampleValue' => 'My feed',
'required' => false,
],
'filter' => [
'name' => 'Filter (regular expression!!!)',
'required' => false,
],
'filter_type' => [
'name' => 'Filter type',
'type' => 'list',
'required' => false,
'values' => [
'Keep matching items' => 'permit',
'Hide matching items' => 'block',
],
'defaultValue' => 'permit',
],
'case_insensitive' => [
'name' => 'Case-insensitive filter',
'type' => 'checkbox',
'required' => false,
],
'fix_encoding' => [
'name' => 'Attempt Latin1/UTF-8 fixes when evaluating filter',
'type' => 'checkbox',
'required' => false,
],
'target_author' => [
'name' => 'Apply filter on author',
'type' => 'checkbox',
'required' => false,
],
'target_content' => [
'name' => 'Apply filter on content',
'type' => 'checkbox',
'required' => false,
],
'target_title' => [
'name' => 'Apply filter on title',
'type' => 'checkbox',
'required' => false,
'defaultValue' => 'checked'
],
'target_uri' => [
'name' => 'Apply filter on URI/URL',
'type' => 'checkbox',
'required' => false,
],
'title_from_content' => [
'name' => 'Generate title from content (overwrite existing title)',
'type' => 'checkbox',
'required' => false,
],
'length_limit' => [
'name' => 'Max length analyzed by filter (-1: no limit)',
'type' => 'number',
'required' => false,
'defaultValue' => -1,
],
]];
public function collectData()
{
$url = $this->getInput('url');
if (!Url::validate($url)) {
throw new \Exception('The url parameter must either refer to http or https protocol.');
}
$this->collectExpandableDatas($this->getURI());
}
protected function parseItem(array $item)
{
// Generate title from first 50 characters of content?
if ($this->getInput('title_from_content') && array_key_exists('content', $item)) {
$content = str_get_html($item['content']);
$plaintext = $content->plaintext;
if (mb_strlen($plaintext) < 51) {
$item['title'] = $plaintext;
} else {
$pos = strpos($item['content'], ' ', 50);
$item['title'] = substr($plaintext, 0, $pos);
if (strlen($plaintext) >= $pos) {
$item['title'] .= '...';
}
}
}
$filter = $this->getInput('filter');
if (! str_contains($filter, '#')) {
$delimiter = '#';
} elseif (! str_contains($filter, '/')) {
$delimiter = '/';
} else {
throw new \Exception('Cannot use both / and # inside filter');
}
$regex = $delimiter . $filter . $delimiter;
if ($this->getInput('case_insensitive')) {
$regex .= 'i';
}
// Retrieve fields to check
$filter_fields = [];
if ($this->getInput('target_author')) {
$filter_fields[] = $item['author'] ?? null;
}
if ($this->getInput('target_content')) {
$filter_fields[] = $item['content'] ?? null;
}
if ($this->getInput('target_title')) {
$filter_fields[] = $item['title'] ?? null;
}
if ($this->getInput('target_uri')) {
// todo: maybe consider 'http' and 'https' equivalent? Also maybe optionally .www subdomain?
$filter_fields[] = $item['uri'] ?? null;
}
// Apply filter on item
$keep_item = false;
$length_limit = intval($this->getInput('length_limit'));
foreach ($filter_fields as $field) {
if ($length_limit > 0) {
$field = substr($field, 0, $length_limit);
}
$result = preg_match($regex, $field);
if ($result === false) {
// todo: maybe notify user about the error here?
}
$keep_item |= boolval($result);
if ($this->getInput('fix_encoding')) {
$keep_item |= boolval(preg_match($regex, utf8_decode($field)));
$keep_item |= boolval(preg_match($regex, utf8_encode($field)));
}
}
// Reverse result? (keep everything but matching items)
if ($this->getInput('filter_type') === 'block') {
$keep_item = !$keep_item;
}
return $keep_item ? $item : null;
}
public function getURI()
{
$url = $this->getInput('url');
if ($url) {
return $url;
}
return parent::getURI();
}
public function getName()
{
$name = $this->getInput('name');
if ($name) {
return $name;
}
return parent::getName();
}
}
|
