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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
<?php
namespace Zotlabs\Lib;
/**
* @brief ActivityStreams class.
*
* Parses an ActivityStream JSON string.
*/
class ActivityStreams {
public $data;
public $valid = false;
public $id = '';
public $type = '';
public $actor = null;
public $obj = null;
public $tgt = null;
public $origin = null;
public $owner = null;
public $signer = null;
public $ldsig = null;
public $sigok = false;
public $recips = null;
public $raw_recips = null;
/**
* @brief Constructor for ActivityStreams.
*
* Takes a JSON string as parameter, decodes it and sets up this object.
*
* @param string $string
*/
function __construct($string) {
$this->data = json_decode($string, true);
if($this->data) {
$this->valid = true;
}
if($this->is_valid()) {
$this->id = $this->get_property_obj('id');
$this->type = $this->get_primary_type();
$this->actor = $this->get_compound_property('actor');
$this->obj = $this->get_compound_property('object');
$this->tgt = $this->get_compound_property('target');
$this->origin = $this->get_compound_property('origin');
$this->recips = $this->collect_recips();
$this->ldsig = $this->get_compound_property('signature');
if($this->ldsig) {
$this->signer = $this->get_compound_property('creator',$this->ldsig);
if($this->signer && $this->signer['publicKey'] && $this->signer['publicKey']['publicKeyPem']) {
$this->sigok = \Zotlabs\Lib\LDSignatures::verify($this->data,$this->signer['publicKey']['publicKeyPem']);
}
}
if(($this->type === 'Note') && (! $this->obj)) {
$this->obj = $this->data;
$this->type = 'Create';
}
}
}
/**
* @brief Return if instantiated ActivityStream is valid.
*
* @return boolean Return true if the JSON string could be decoded.
*/
function is_valid() {
return $this->valid;
}
function set_recips($arr) {
$this->saved_recips = $arr;
}
/**
* @brief Collects all recipients.
*
* @param string $base
* @param string $namespace (optional) default empty
* @return array
*/
function collect_recips($base = '', $namespace = '') {
$x = [];
$fields = [ 'to', 'cc', 'bto', 'bcc', 'audience'];
foreach($fields as $f) {
$y = $this->get_compound_property($f, $base, $namespace);
if($y) {
$x = array_merge($x, $y);
if(! is_array($this->raw_recips))
$this->raw_recips = [];
$this->raw_recips[$f] = $x;
}
}
// not yet ready for prime time
// $x = $this->expand($x,$base,$namespace);
return $x;
}
function expand($arr,$base = '',$namespace = '') {
$ret = [];
// right now use a hardwired recursion depth of 5
for($z = 0; $z < 5; $z ++) {
if(is_array($arr) && $arr) {
foreach($arr as $a) {
if(is_array($a)) {
$ret[] = $a;
}
else {
$x = $this->get_compound_property($a,$base,$namespace);
if($x) {
$ret = array_merge($ret,$x);
}
}
}
}
}
/// @fixme de-duplicate
return $ret;
}
/**
* @brief
*
* @param array $base
* @param string $namespace if not set return empty string
* @return string|NULL
*/
function get_namespace($base, $namespace) {
if(! $namespace)
return '';
$key = null;
foreach( [ $this->data, $base ] as $b ) {
if(! $b)
continue;
if(array_key_exists('@context', $b)) {
if(is_array($b['@context'])) {
foreach($b['@context'] as $ns) {
if(is_array($ns)) {
foreach($ns as $k => $v) {
if($namespace === $v)
$key = $k;
}
}
else {
if($namespace === $ns) {
$key = '';
}
}
}
}
else {
if($namespace === $b['@context']) {
$key = '';
}
}
}
}
return $key;
}
/**
* @brief
*
* @param string $property
* @param array $base (optional)
* @param string $namespace (optional) default empty
* @return NULL|mixed
*/
function get_property_obj($property, $base = '', $namespace = '') {
$prefix = $this->get_namespace($base, $namespace);
if($prefix === null)
return null;
$base = (($base) ? $base : $this->data);
$propname = (($prefix) ? $prefix . ':' : '') . $property;
return ((array_key_exists($propname, $base)) ? $base[$propname] : null);
}
/**
* @brief Fetches a property from an URL.
*
* @param string $url
* @return NULL|mixed
*/
function fetch_property($url) {
$redirects = 0;
if(! check_siteallowed($url)) {
logger('blacklisted: ' . $url);
return null;
}
$x = z_fetch_url($url, true, $redirects,
['headers' => [ 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams", application/activity+json' ]]);
if($x['success'])
return json_decode($x['body'], true);
return null;
}
/**
* @brief
*
* @param string $property
* @param array $base
* @param string $namespace (optional) default empty
* @return NULL|mixed
*/
function get_compound_property($property, $base = '', $namespace = '') {
$x = $this->get_property_obj($property, $base, $namespace);
if($this->is_url($x)) {
$x = $this->fetch_property($x);
}
return $x;
}
/**
* @brief Check if string starts with http.
*
* @param string $url
* @return boolean
*/
function is_url($url) {
if(($url) && (! is_array($url)) && (strpos($url, 'http') === 0)) {
return true;
}
return false;
}
/**
* @brief Gets the type property.
*
* @param array $base
* @param string $namespace (optional) default empty
* @return NULL|mixed
*/
function get_primary_type($base = '', $namespace = '') {
if(! $base)
$base = $this->data;
$x = $this->get_property_obj('type', $base, $namespace);
if(is_array($x)) {
foreach($x as $y) {
if(strpos($y, ':') === false) {
return $y;
}
}
}
return $x;
}
function debug() {
$x = var_export($this, true);
return $x;
}
}
|
