Complex classes like Client often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Client, and based on these observations, apply Extract Interface, too.
| 1 | <?php declare(strict_types = 1);  | 
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| 40 | class Client implements Loggable  | 
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| 41 | { | 
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| 42 | /**  | 
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| 43 | * @var string  | 
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| 44 | */  | 
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| 45 | const VERSION = '4.0.0';  | 
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| 46 | |||
| 47 | /**  | 
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| 48 | * @var string  | 
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| 49 | */  | 
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| 50 | protected $token;  | 
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| 51 | |||
| 52 | /**  | 
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| 53 | * @var LoggerInterface  | 
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| 54 | */  | 
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| 55 | protected $logger;  | 
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| 56 | |||
| 57 | /**  | 
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| 58 | * @var LoopInterface  | 
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| 59 | */  | 
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| 60 | protected $loop;  | 
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| 61 | |||
| 62 | /**  | 
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| 63 | * @var array  | 
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| 64 | */  | 
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| 65 | private $storage = [];  | 
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| 66 | |||
| 67 | /**  | 
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| 68 | * Client constructor.  | 
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| 69 | * @param string $token  | 
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| 70 | * @param LoggerInterface $logger  | 
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| 71 | */  | 
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| 72 | public function __construct(string $token, LoggerInterface $logger = null)  | 
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| 81 | |||
| 82 | /**  | 
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| 83 | * @return void  | 
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| 84 | */  | 
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| 85 | public function clear()  | 
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| 90 | |||
| 91 | /**  | 
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| 92 | * @param string $message  | 
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| 93 | * @param int $level  | 
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| 94 | * @return Loggable|$this  | 
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| 95 | */  | 
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| 96 | public function log(string $message, int $level = Logger::INFO): Loggable  | 
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| 102 | |||
| 103 | /**  | 
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| 104 | * @return SyncAdapterInterface|AdapterInterface  | 
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| 105 | */  | 
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| 106 | public function viaHttp(): SyncAdapterInterface  | 
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| 110 | |||
| 111 | /**  | 
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| 112 | * @return StreamAdapterInterface|AdapterInterface  | 
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| 113 | */  | 
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| 114 | public function viaStream(): StreamAdapterInterface  | 
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| 118 | |||
| 119 | /**  | 
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| 120 | * @return void  | 
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| 121 | */  | 
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| 122 | public function connect()  | 
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| 126 | |||
| 127 | /**  | 
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| 128 | * @param string $hookId  | 
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| 129 | * @return WebHook  | 
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| 130 | * @throws \InvalidArgumentException  | 
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| 131 | */  | 
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| 132 | public function notify(string $hookId): WebHook  | 
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| 136 | |||
| 137 | /**  | 
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| 138 | * @param string $resource  | 
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| 139 | * @return Groups|Messages|Rooms|Users|null|LoggerInterface|LoopInterface|string  | 
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| 140 | */  | 
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| 141 | public function __get(string $resource)  | 
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| 173 | |||
| 174 | /**  | 
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| 175 | * @param string $name  | 
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| 176 | * @param $value  | 
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| 177 | * @return void  | 
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| 178 | */  | 
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| 179 | public function __set(string $name, $value)  | 
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| 199 | |||
| 200 | /**  | 
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| 201 | * @return array  | 
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| 202 | * @throws \RuntimeException  | 
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| 203 | * @throws \InvalidArgumentException  | 
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| 204 | */  | 
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| 205 | public function auth(): array  | 
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| 209 | |||
| 210 | /**  | 
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| 211 | * @return string  | 
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| 212 | * @throws \RuntimeException  | 
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| 213 | * @throws \InvalidArgumentException  | 
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| 214 | */  | 
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| 215 | public function authId(): string  | 
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| 219 | |||
| 220 | /**  | 
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| 221 | * @param LoopInterface|null $loop  | 
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| 222 | * @return LoopInterface  | 
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| 223 | */  | 
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| 224 | public function loop(LoopInterface $loop = null): LoopInterface  | 
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| 232 | |||
| 233 | /**  | 
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| 234 | * @param string|null $token  | 
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| 235 | * @return string  | 
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| 236 | */  | 
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| 237 | public function token(string $token = null): string  | 
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| 245 | |||
| 246 | /**  | 
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| 247 | * @param LoggerInterface|null $logger  | 
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| 248 | * @return LoggerInterface  | 
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| 249 | */  | 
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| 250 | public function logger(LoggerInterface $logger = null): LoggerInterface  | 
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| 258 | |||
| 259 | /**  | 
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| 260 | * @param string $name  | 
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| 261 | * @throws \LogicException  | 
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| 262 | */  | 
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| 263 | public function __unset(string $name)  | 
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| 280 | |||
| 281 | /**  | 
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| 282 | * @param string $name  | 
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| 283 | * @return bool  | 
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| 284 | */  | 
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| 285 | public function __isset(string $name): bool  | 
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| 295 | }  | 
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| 296 |