|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace roxblnfk\SmartStream\Stream; |
|
6
|
|
|
|
|
7
|
|
|
use Generator; |
|
8
|
|
|
use Psr\Http\Message\StreamInterface; |
|
9
|
|
|
|
|
10
|
|
|
final class GeneratorStream implements StreamInterface |
|
11
|
|
|
{ |
|
12
|
|
|
public const READ_MODE_AS_IS = 1; |
|
13
|
|
|
public const READ_MODE_FIRST_YIELD = 2; |
|
14
|
|
|
|
|
15
|
|
|
private int $readMode = self::READ_MODE_AS_IS; |
|
16
|
|
|
|
|
17
|
|
|
private ?Generator $stream; |
|
18
|
|
|
|
|
19
|
|
|
private bool $readable = true; |
|
20
|
|
|
|
|
21
|
|
|
private ?int $size = null; |
|
22
|
|
|
|
|
23
|
|
|
private int $caret = 0; |
|
24
|
|
|
|
|
25
|
|
|
private bool $started = false; |
|
26
|
|
|
|
|
27
|
19 |
|
public function __construct(Generator $body) |
|
28
|
|
|
{ |
|
29
|
19 |
|
$this->stream = $body; |
|
30
|
19 |
|
} |
|
31
|
|
|
|
|
32
|
1 |
|
public function __toString(): string |
|
33
|
|
|
{ |
|
34
|
|
|
try { |
|
35
|
1 |
|
if ($this->isSeekable()) { |
|
36
|
|
|
$this->seek(0); |
|
37
|
|
|
} |
|
38
|
|
|
|
|
39
|
1 |
|
return $this->getContents(); |
|
40
|
|
|
} catch (\Exception $e) { |
|
41
|
|
|
return ''; |
|
42
|
|
|
} |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
1 |
|
public function close(): void |
|
46
|
|
|
{ |
|
47
|
1 |
|
if ($this->stream !== null) { |
|
48
|
1 |
|
$this->detach(); |
|
49
|
|
|
} |
|
50
|
1 |
|
} |
|
51
|
|
|
|
|
52
|
2 |
|
public function detach() |
|
53
|
|
|
{ |
|
54
|
2 |
|
if ($this->stream === null) { |
|
55
|
|
|
return null; |
|
56
|
|
|
} |
|
57
|
2 |
|
$this->stream; |
|
58
|
2 |
|
$this->stream = null; |
|
59
|
2 |
|
$this->size = null; |
|
60
|
2 |
|
$this->caret = 0; |
|
61
|
2 |
|
$this->started = false; |
|
62
|
2 |
|
$this->readable = false; |
|
63
|
2 |
|
return null; |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
4 |
|
public function getSize(): ?int |
|
67
|
|
|
{ |
|
68
|
4 |
|
if (null !== $this->size) { |
|
69
|
1 |
|
return $this->size; |
|
70
|
|
|
} |
|
71
|
|
|
|
|
72
|
3 |
|
if ($this->stream === null) { |
|
73
|
2 |
|
return null; |
|
74
|
|
|
} |
|
75
|
|
|
|
|
76
|
1 |
|
return null; |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
4 |
|
public function tell(): int |
|
80
|
|
|
{ |
|
81
|
4 |
|
return $this->caret; |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
10 |
|
public function eof(): bool |
|
85
|
|
|
{ |
|
86
|
10 |
|
return $this->stream === null || !$this->stream->valid(); |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
2 |
|
public function isSeekable(): bool |
|
90
|
|
|
{ |
|
91
|
2 |
|
return false; |
|
92
|
|
|
} |
|
93
|
|
|
|
|
94
|
1 |
|
public function seek($offset, $whence = \SEEK_SET): void |
|
95
|
|
|
{ |
|
96
|
1 |
|
throw new \RuntimeException('Stream is not seekable'); |
|
97
|
|
|
} |
|
98
|
|
|
|
|
99
|
1 |
|
public function rewind(): void |
|
100
|
|
|
{ |
|
101
|
1 |
|
if ($this->stream !== null) { |
|
102
|
1 |
|
$this->stream->rewind(); |
|
103
|
|
|
} |
|
104
|
1 |
|
$this->caret = 0; |
|
105
|
1 |
|
$this->started = false; |
|
106
|
1 |
|
} |
|
107
|
|
|
|
|
108
|
2 |
|
public function isWritable(): bool |
|
109
|
|
|
{ |
|
110
|
2 |
|
return false; |
|
111
|
|
|
} |
|
112
|
|
|
|
|
113
|
1 |
|
public function write($string): int |
|
114
|
|
|
{ |
|
115
|
1 |
|
if (!$this->isWritable()) { |
|
116
|
1 |
|
throw new \RuntimeException('Cannot write to a non-writable stream'); |
|
117
|
|
|
} |
|
118
|
|
|
return 0; |
|
119
|
|
|
} |
|
120
|
|
|
|
|
121
|
3 |
|
public function isReadable(): bool |
|
122
|
|
|
{ |
|
123
|
3 |
|
return $this->readable; |
|
124
|
|
|
} |
|
125
|
|
|
|
|
126
|
8 |
|
public function read($length): string |
|
127
|
|
|
{ |
|
128
|
8 |
|
if (!$this->readable) { |
|
129
|
|
|
throw new \RuntimeException('Cannot read from non-readable stream'); |
|
130
|
|
|
} |
|
131
|
8 |
|
if ($this->eof()) { |
|
132
|
1 |
|
throw new \RuntimeException('Cannot read from ended stream'); |
|
133
|
|
|
} |
|
134
|
8 |
|
if (!$this->started) { |
|
135
|
8 |
|
$this->started = true; |
|
136
|
8 |
|
$read = (string)$this->stream->current(); |
|
137
|
8 |
|
$this->caret += strlen($read); |
|
138
|
8 |
|
return $read; |
|
139
|
|
|
} |
|
140
|
7 |
|
if ($this->readMode === self::READ_MODE_FIRST_YIELD) { |
|
141
|
|
|
$content = ''; |
|
142
|
|
|
while (!$this->eof()) { |
|
143
|
|
|
$content .= $this->stream->send(null); |
|
144
|
|
|
} |
|
145
|
|
|
return $content; |
|
146
|
|
|
} |
|
147
|
7 |
|
$read = (string)$this->stream->send(null); |
|
148
|
7 |
|
$this->caret += strlen($read); |
|
149
|
7 |
|
if ($this->eof()) { |
|
150
|
6 |
|
$this->size = $this->caret; |
|
151
|
|
|
} |
|
152
|
7 |
|
return $read; |
|
153
|
|
|
} |
|
154
|
|
|
|
|
155
|
6 |
|
public function getContents(): string |
|
156
|
|
|
{ |
|
157
|
6 |
|
if ($this->stream === null) { |
|
158
|
|
|
throw new \RuntimeException('Unable to read stream contents'); |
|
159
|
|
|
} |
|
160
|
6 |
|
$content = ''; |
|
161
|
6 |
|
while (!$this->eof()) { |
|
162
|
6 |
|
$content .= $this->read(PHP_INT_MAX); |
|
163
|
|
|
} |
|
164
|
6 |
|
return $content; |
|
165
|
|
|
} |
|
166
|
|
|
|
|
167
|
|
|
public function getMetadata($key = null) |
|
168
|
|
|
{ |
|
169
|
|
|
if ($this->stream === null) { |
|
170
|
|
|
return $key ? null : []; |
|
171
|
|
|
} |
|
172
|
|
|
|
|
173
|
|
|
$meta = [ |
|
174
|
|
|
'seekable' => $this->isSeekable(), |
|
175
|
|
|
'eof' => $this->eof(), |
|
176
|
|
|
]; |
|
177
|
|
|
|
|
178
|
|
|
if (null === $key) { |
|
179
|
|
|
return $meta; |
|
180
|
|
|
} |
|
181
|
|
|
|
|
182
|
|
|
return $meta[$key] ?? null; |
|
183
|
|
|
} |
|
184
|
|
|
} |
|
185
|
|
|
|
roxblnfk /
smart-stream
