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1 | <?php |
2 | |
3 | // TODO: |
4 | // Read this: https://sourcemaking.com/design_patterns/strategy |
5 | |
6 | namespace WebPConvert\Convert\Converters; |
7 | |
8 | use WebPConvert\Helpers\InputValidator; |
9 | use WebPConvert\Helpers\MimeType; |
10 | use WebPConvert\Convert\Exceptions\ConversionFailedException; |
11 | use WebPConvert\Convert\Converters\BaseTraits\AutoQualityTrait; |
12 | use WebPConvert\Convert\Converters\BaseTraits\DestinationPreparationTrait; |
13 | use WebPConvert\Convert\Converters\BaseTraits\LoggerTrait; |
14 | use WebPConvert\Convert\Converters\BaseTraits\OptionsTrait; |
15 | use WebPConvert\Convert\Converters\BaseTraits\WarningLoggerTrait; |
16 | use WebPConvert\Exceptions\WebPConvertException; |
17 | use WebPConvert\Loggers\BaseLogger; |
18 | |
19 | /** |
20 | * Base for all converter classes. |
21 | * |
22 | * @package WebPConvert |
23 | * @author Bjørn Rosell <it@rosell.dk> |
24 | * @since Class available since Release 2.0.0 |
25 | */ |
26 | abstract class AbstractConverter |
27 | { |
28 | use AutoQualityTrait; |
29 | use OptionsTrait; |
30 | use WarningLoggerTrait; |
31 | use DestinationPreparationTrait; |
32 | use LoggerTrait; |
33 | |
34 | /** |
35 | * The actual conversion is be done by a concrete converter extending this class. |
36 | * |
37 | * At the stage this method is called, the abstract converter has taken preparational steps. |
38 | * - It has created the destination folder (if neccesary) |
39 | * - It has checked the input (valid mime type) |
40 | * - It has set up an error handler, mostly in order to catch and log warnings during the doConvert fase |
41 | * |
42 | * Note: This method is not meant to be called from the outside. Use the static *convert* method for converting |
43 | * or, if you wish, create an instance with ::createInstance() and then call ::doConvert() |
44 | * |
45 | * @throws ConversionFailedException in case conversion failed in an antipiciated way (or subclass) |
46 | * @throws \Exception in case conversion failed in an unantipiciated way |
47 | */ |
48 | abstract protected function doActualConvert(); |
49 | |
50 | /** |
51 | * Whether or not the converter supports lossless encoding (even for jpegs) |
52 | * |
53 | * PS: Converters that supports lossless encoding all use the EncodingAutoTrait, which |
54 | * overrides this function. |
55 | * |
56 | * @return boolean Whether the converter supports lossless encoding (even for jpegs). |
57 | */ |
58 | public function supportsLossless() |
59 | { |
60 | return false; |
61 | } |
62 | |
63 | /** @var string The filename of the image to convert (complete path) */ |
64 | protected $source; |
65 | |
66 | /** @var string Where to save the webp (complete path) */ |
67 | protected $destination; |
68 | |
69 | /** |
70 | * Check basis operationality |
71 | * |
72 | * Converters may override this method for the purpose of performing basic operationaly checks. It is for |
73 | * running general operation checks for a conversion method. |
74 | * If some requirement is not met, it should throw a ConverterNotOperationalException (or subtype) |
75 | * |
76 | * The method is called internally right before calling doActualConvert() method. |
77 | * - It SHOULD take options into account when relevant. For example, a missing api key for a |
78 | * cloud converter should be detected here |
79 | * - It should NOT take the actual filename into consideration, as the purpose is *general* |
80 | * For that pupose, converters should override checkConvertability |
81 | * Also note that doConvert method is allowed to throw ConverterNotOperationalException too. |
82 | * |
83 | * @return void |
84 | */ |
85 | public function checkOperationality() |
86 | { |
87 | } |
88 | |
89 | /** |
90 | * Converters may override this for the purpose of performing checks on the concrete file. |
91 | * |
92 | * This can for example be used for rejecting big uploads in cloud converters or rejecting unsupported |
93 | * image types. |
94 | * |
95 | * @return void |
96 | */ |
97 | public function checkConvertability() |
98 | { |
99 | } |
100 | |
101 | /** |
102 | * Constructor. |
103 | * |
104 | * @param string $source path to source file |
105 | * @param string $destination path to destination |
106 | * @param array $options (optional) options for conversion |
107 | * @param BaseLogger $logger (optional) |
108 | */ |
109 | final public function __construct($source = '', $destination = '', $options = [], $logger = null) |
110 | { |
111 | if ($source == '') { |
112 | return; |
113 | } |
114 | InputValidator::checkSourceAndDestination($source, $destination); |
115 | |
116 | $this->source = $source; |
117 | $this->destination = $destination; |
118 | |
119 | $this->setLogger($logger); |
120 | $this->setProvidedOptions($options); |
121 | |
122 | if (!isset($this->options['_skip_input_check'])) { |
123 | $this->logLn('WebP Convert 2.9.0 ignited', 'bold'); |
124 | $this->logLn('PHP version: ' . phpversion()); |
125 | if (isset($_SERVER['SERVER_SOFTWARE'])) { |
126 | $this->logLn('Server software: ' . $_SERVER['SERVER_SOFTWARE']); |
127 | } |
128 | $this->logLn(''); |
129 | if (isset($this->options['log-call-arguments']) && $this->options['log-call-arguments']) { |
130 | $this->logLn('source: ' . $this->source); |
131 | $this->logLn('destination: ' . $this->destination); |
132 | $this->logLn(''); |
133 | } |
134 | |
135 | $this->logLn(self::getConverterDisplayName() . ' converter ignited', 'bold'); |
136 | } |
137 | } |
138 | |
139 | /** |
140 | * Get source. |
141 | * |
142 | * @return string The source. |
143 | */ |
144 | public function getSource() |
145 | { |
146 | return $this->source; |
147 | } |
148 | |
149 | /** |
150 | * Get destination. |
151 | * |
152 | * @return string The destination. |
153 | */ |
154 | public function getDestination() |
155 | { |
156 | return $this->destination; |
157 | } |
158 | |
159 | /** |
160 | * Set destination. |
161 | * |
162 | * @param string $destination path to destination |
163 | * @return void |
164 | */ |
165 | public function setDestination($destination) |
166 | { |
167 | $this->destination = $destination; |
168 | } |
169 | |
170 | |
171 | /** |
172 | * Get converter name for display (defaults to the class name (short)). |
173 | * |
174 | * Converters can override this. |
175 | * |
176 | * @return string A display name, ie "Gd" |
177 | */ |
178 | protected static function getConverterDisplayName() |
179 | { |
180 | // https://stackoverflow.com/questions/19901850/how-do-i-get-an-objects-unqualified-short-class-name/25308464 |
181 | return substr(strrchr('\\' . static::class, '\\'), 1); |
182 | } |
183 | |
184 | |
185 | /** |
186 | * Get converter id (defaults to the class name lowercased) |
187 | * |
188 | * Converters can override this. |
189 | * |
190 | * @return string A display name, ie "Gd" |
191 | */ |
192 | protected static function getConverterId() |
193 | { |
194 | return strtolower(self::getConverterDisplayName()); |
195 | } |
196 | |
197 | |
198 | /** |
199 | * Create an instance of this class |
200 | * |
201 | * @param string $source The path to the file to convert |
202 | * @param string $destination The path to save the converted file to |
203 | * @param array $options (optional) |
204 | * @param \WebPConvert\Loggers\BaseLogger $logger (optional) |
205 | * |
206 | * @return static |
207 | */ |
208 | public static function createInstance($source, $destination, $options = [], $logger = null) |
209 | { |
210 | return new static($source, $destination, $options, $logger); |
211 | } |
212 | |
213 | protected function logReduction($source, $destination) |
214 | { |
215 | $sourceSize = filesize($source); |
216 | $destSize = filesize($destination); |
217 | $this->log(round(($sourceSize - $destSize) / $sourceSize * 100) . '% '); |
218 | if ($sourceSize < 10000) { |
219 | $this->logLn('(went from ' . strval($sourceSize) . ' bytes to ' . strval($destSize) . ' bytes)'); |
220 | } else { |
221 | $this->logLn('(went from ' . round($sourceSize / 1024) . ' kb to ' . round($destSize / 1024) . ' kb)'); |
222 | } |
223 | } |
224 | |
225 | /** |
226 | * Run conversion. |
227 | * |
228 | * @return void |
229 | */ |
230 | private function doConvertImplementation() |
231 | { |
232 | $beginTime = microtime(true); |
233 | |
234 | $this->activateWarningLogger(); |
235 | |
236 | $this->checkOptions(); |
237 | |
238 | // Prepare destination folder |
239 | $this->createWritableDestinationFolder(); |
240 | $this->removeExistingDestinationIfExists(); |
241 | |
242 | if (!isset($this->options['_skip_input_check'])) { |
243 | // Check that a file can be written to destination |
244 | $this->checkDestinationWritable(); |
245 | } |
246 | |
247 | $this->checkOperationality(); |
248 | $this->checkConvertability(); |
249 | |
250 | if ($this->options['log-call-arguments']) { |
251 | $this->logOptions(); |
252 | $this->logLn(''); |
253 | } |
254 | |
255 | $this->runActualConvert(); |
256 | |
257 | $source = $this->source; |
258 | $destination = $this->destination; |
259 | |
260 | if (!@file_exists($destination)) { |
261 | throw new ConversionFailedException('Destination file is not there: ' . $destination); |
262 | } elseif (@filesize($destination) === 0) { |
263 | unlink($destination); |
264 | throw new ConversionFailedException('Destination file was completely empty'); |
265 | } else { |
266 | if (!isset($this->options['_suppress_success_message'])) { |
267 | $this->ln(); |
268 | $this->log('Converted image in ' . round((microtime(true) - $beginTime) * 1000) . ' ms'); |
269 | |
270 | $sourceSize = @filesize($source); |
271 | if ($sourceSize !== false) { |
272 | $this->log(', reducing file size with '); |
273 | $this->logReduction($source, $destination); |
274 | } |
275 | } |
276 | } |
277 | |
278 | $this->deactivateWarningLogger(); |
279 | } |
280 | |
281 | //private function logEx |
282 | /** |
283 | * Start conversion. |
284 | * |
285 | * Usually it would be more convenience to call the static convert method, but alternatively you can call |
286 | * call ::createInstance to get an instance and then ::doConvert(). |
287 | * |
288 | * @return void |
289 | */ |
290 | public function doConvert() |
291 | { |
292 | try { |
293 | //trigger_error('hello', E_USER_ERROR); |
294 | $this->doConvertImplementation(); |
295 | } catch (WebPConvertException $e) { |
296 | $this->logLn(''); |
297 | /* |
298 | if (isset($e->description) && ($e->description != '')) { |
299 | $this->log('Error: ' . $e->description . '. ', 'bold'); |
300 | } else { |
301 | $this->log('Error: ', 'bold'); |
302 | } |
303 | */ |
304 | $this->log('Error: ', 'bold'); |
305 | $this->logLn($e->getMessage(), 'bold'); |
306 | throw $e; |
307 | } catch (\Exception $e) { |
308 | $className = get_class($e); |
309 | $classNameParts = explode("\\", $className); |
310 | $shortClassName = array_pop($classNameParts); |
311 | |
312 | $this->logLn(''); |
313 | $this->logLn($shortClassName . ' thrown in ' . $e->getFile() . ':' . $e->getLine(), 'bold'); |
314 | $this->logLn('Message: "' . $e->getMessage() . '"', 'bold'); |
315 | |
316 | $this->logLn('Trace:'); |
317 | foreach ($e->getTrace() as $trace) { |
318 | //$this->logLn(print_r($trace, true)); |
319 | if (isset($trace['file']) && isset($trace['line'])) { |
320 | $this->logLn( |
321 | $trace['file'] . ':' . $trace['line'] |
322 | ); |
323 | } |
324 | } |
325 | throw $e; |
326 | } catch (\Throwable $e) { |
327 | $className = get_class($e); |
328 | $classNameParts = explode("\\", $className); |
329 | $shortClassName = array_pop($classNameParts); |
330 | |
331 | $this->logLn(''); |
332 | $this->logLn($shortClassName . ' thrown in ' . $e->getFile() . ':' . $e->getLine(), 'bold'); |
333 | $this->logLn('Message: "' . $e->getMessage() . '"', 'bold'); |
334 | throw $e; |
335 | } |
336 | } |
337 | |
338 | /** |
339 | * Runs the actual conversion (after setup and checks) |
340 | * Simply calls the doActualConvert() of the actual converter. |
341 | * However, in the EncodingAutoTrait, this method is overridden to make two conversions |
342 | * and select the smallest. |
343 | * |
344 | * @return void |
345 | */ |
346 | protected function runActualConvert() |
347 | { |
348 | $this->doActualConvert(); |
349 | } |
350 | |
351 | /** |
352 | * Convert an image to webp. |
353 | * |
354 | * @param string $source path to source file |
355 | * @param string $destination path to destination |
356 | * @param array $options (optional) options for conversion |
357 | * @param BaseLogger $logger (optional) |
358 | * |
359 | * @throws ConversionFailedException in case conversion fails in an antipiciated way |
360 | * @throws \Exception in case conversion fails in an unantipiciated way |
361 | * @return void |
362 | */ |
363 | public static function convert($source, $destination, $options = [], $logger = null) |
364 | { |
365 | $c = self::createInstance($source, $destination, $options, $logger); |
366 | $c->doConvert(); |
367 | //echo $instance->id; |
368 | } |
369 | |
370 | /** |
371 | * Get mime type for image (best guess). |
372 | * |
373 | * It falls back to using file extension. If that fails too, false is returned |
374 | * |
375 | * PS: Is it a security risk to fall back on file extension? |
376 | * - By setting file extension to "jpg", one can lure our library into trying to convert a file, which isn't a jpg. |
377 | * hmm, seems very unlikely, though not unthinkable that one of the converters could be exploited |
378 | * |
379 | * @return string|false|null mimetype (if it is an image, and type could be determined / guessed), |
380 | * false (if it is not an image type that the server knowns about) |
381 | * or null (if nothing can be determined) |
382 | */ |
383 | public function getMimeTypeOfSource() |
384 | { |
385 | return MimeType::getMimeTypeDetectionResult($this->source); |
386 | } |
387 | } |