CommandDispatcher::matchDefault() - Code Metrics - CharlotteDunois/Livia - Measure and Improve Code Quality continuously with Scrutinizer

CommandDispatcher::matchDefault() A
last analyzed 2019-10-24 18:53 UTC

↳ Parent: CommandDispatcher

Complexity

Conditions	5
Paths	3

Size

Total Lines	13
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	5
eloc	8
nc	3
nop	3
dl	0
loc	13
rs	9.6111
c	0
b	0
f	0

<?php
/**
 * Livia
 * Copyright 2017-2019 Charlotte Dunois, All Rights Reserved
 *
 * Website: https://charuru.moe
 * License: https://github.com/CharlotteDunois/Livia/blob/master/LICENSE
*/

namespace CharlotteDunois\Livia;

/**
 * Handles parsing messages and running commands from them.
 *
 * @property \CharlotteDunois\Livia\Client  $client  The client which initiated the instance.
 */
class CommandDispatcher implements \Serializable {
    /**
     * The client which initiated the instance.
     * @var \CharlotteDunois\Livia\Client
     */
    protected $client;
    
    /**
     * Functions that can block commands from running.
     * @var callable[]
     */
    protected $inhibitors = array();
    
    /**
     * AuthorID+ChannelID combination waiting for responses
     * @var string[]
     */
    protected $awaiting = array();
    
    /**
     * Patterns of command.
     * @var string[]
     */
    protected $commandPatterns = array();
    
    /**
     * Command results.
     * @var \CharlotteDunois\Collect\Collection
     */
    protected $results;
    
    /**
     * Contains an array of authorID-channelID-command => timestamps, used for throttling throttling or other some sort of "failure" messages.
     * @var array
     */
    protected $negativeResponseThrottling = array();
    
    /**
     * @internal
     */
    function __construct(\CharlotteDunois\Livia\Client $client) {
        $this->client = $client;
        
        $this->results = new \CharlotteDunois\Collect\Collection();
    }
    
    /**
     * @param string  $name
     * @return bool
     * @throws \Exception
     * @internal
     */
    function __isset($name) {
        try {
            return $this->$name !== null;
        } catch (\RuntimeException $e) {
            if($e->getTrace()[0]['function'] === '__get') {
                return false;
            }
            
            throw $e;
        }
    }
    
    /**
     * @param string  $name
     * @return mixed
     * @throws \RuntimeException
     * @internal
     */
    function __get($name) {
        if(\property_exists($this, $name)) {
            return $this->$name;
        }
        
        throw new \RuntimeException('Unknown property '.\get_class($this).'::$'.$name);
    }
    
    /**
     * @return string
     * @internal
     */
    function serialize() {
        $vars = \get_object_vars($this);
        
        unset($vars['client'], $vars['inhibitors']);
        
        return \serialize($vars);
    }
    
    /**
     * @return void
     * @internal
     */
    function unserialize($vars) {
        if(\CharlotteDunois\Yasmin\Models\ClientBase::$serializeClient === null) {
            throw new \Exception('Unable to unserialize a class without ClientBase::$serializeClient being set');
        }
        
        $vars = \unserialize($vars);
        
        foreach($vars as $name => $val) {
            $this->$name = $val;
        }
        
        $this->client = \CharlotteDunois\Yasmin\Models\ClientBase::$serializeClient;
    }
    
    /**
     * Adds an inhibitor.
     *
     * The inhibitor is supposed to return false, if the command should not be blocked. Otherwise it should return a string (as reason) or an array, containing as first element the reason and as second element a Promise (which resolves to a Message), a Message instance or null.
     * The inhibitor can return a Promise (for async computation), but has to resolve with `false` or reject with array or string.
     *
     * Callable specification:
     * ```
     * function (\CharlotteDunois\Livia\Commands\Context $message): array|string|false|ExtendedPromiseInterface
     * ```
     *
     * @param callable  $inhibitor
     * @return $this
     */
    function addInhibitor(callable $inhibitor) {
        if(!\in_array($inhibitor, $this->inhibitors, true)) {
            $this->inhibitors[] = $inhibitor;
        }
        
        return $this;
    }
    
    /**
     * Removes an inhibitor.
     * @param callable  $inhibitor
     * @return $this
     */
    function removeInhibitor(callable $inhibitor) {
        $key = \array_search($inhibitor, $this->inhibitors, true);
        if($key !== false) {
            unset($this->inhibitors[$key]);
        }
        
        return $this;
    }
    
    /**
     * Handles an incoming message.
     * @param \CharlotteDunois\Yasmin\Models\Message       $message
     * @param \CharlotteDunois\Yasmin\Models\Message|null  $oldMessage
     * @return \React\Promise\ExtendedPromiseInterface
     */
    function handleMessage(\CharlotteDunois\Yasmin\Models\Message $message, \CharlotteDunois\Yasmin\Models\Message $oldMessage = null) {
        return (new \React\Promise\Promise(function (callable $resolve) use ($message, $oldMessage) {
            try {
                if(!$this->shouldHandleMessage($message, $oldMessage)) {
                    return $resolve();
                }
                
                $cmdMessage = null;
                $oldCmdMessage = null;
                
                if($oldMessage !== null) {
                    $oldCmdMessage = $this->results->get($oldMessage->id);
                    if($oldCmdMessage === null && !$this->client->getOption('nonCommandEditable')) {
                        return $resolve();
                    }
                    
                    $cmdMessage = $this->parseMessage($message);
                    if($cmdMessage && $oldCmdMessage) {
                        $cmdMessage->setResponses($oldCmdMessage->responses);
                    }
                } else {
                    $cmdMessage = $this->parseMessage($message);
                }
                
                if($cmdMessage) {
                    $this->inhibit($cmdMessage)->done(function () use ($message, $oldMessage, $cmdMessage, $resolve) {
                        if($cmdMessage->command) {
                            if($cmdMessage->command->isEnabledIn($message->guild)) {
                                $cmdMessage->run()->done(function ($responses = null) use ($message, $oldMessage, $cmdMessage, $resolve) {
                                    if($responses !== null && !\is_array($responses)) {
                                        $responses = array($responses);
                                    }
                                    
                                    $cmdMessage->finalize($responses);
                                    $this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
                                    $resolve();
                                });
                            } else {
                                $message->reply('The command `'.$cmdMessage->command->name.'` is disabled.')->done(function ($response) use ($message, $oldMessage, $cmdMessage, $resolve) {
                                    $responses = array($response);
                                    $cmdMessage->finalize($responses);
                                    
                                    $this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
                                    $resolve();
                                });
                            }
                        } else {
                            $this->client->emit('unknownCommand', $cmdMessage);
                            if(((bool) $this->client->getOption('unknownCommandResponse', true))) {
                                $message->reply('Unknown command. Use '.\CharlotteDunois\Livia\Commands\Command::anyUsage('help').'.')->done(function ($response) use ($message, $oldMessage, $cmdMessage, $resolve) {
                                    $responses = array($response);
                                    $cmdMessage->finalize($responses);
                                    
                                    $this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
                                    $resolve();
                                });
                            }
                        }
                    }, function ($inhibited) use ($message, $oldMessage, $cmdMessage, $resolve) {
                        if(!\is_array($inhibited)) {
                            $inhibited = array($inhibited, null);
                        }
                        
                        $this->client->emit('commandBlocked', $cmdMessage, $inhibited[0]);
                        
                        if(!($inhibited[1] instanceof \React\Promise\PromiseInterface)) {
                            $inhibited[1] = \React\Promise\resolve($inhibited[1]);
                        }
                        
                        $inhibited[1]->done(function ($responses) use ($message, $oldMessage, $cmdMessage, $resolve) {
                            if($responses !== null) {
                                $responses = array($responses);
                            }
                            
                            $cmdMessage->finalize($responses);
                            $this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
                            $resolve();
                        });
                    });
                } elseif($oldCmdMessage) {
                    $oldCmdMessage->finalize(null);
                    if(!$this->client->getOption('nonCommandEditable')) {
                        $this->results->delete($message->id);
                    }
                    
                    $this->cacheCommandMessage($message, $oldMessage, $cmdMessage, array());
                    $resolve();
                }
            } catch (\Throwable $error) {
                $this->client->emit('error', $error);
                throw $error;
            }
        }));
    }
    
    /**
     * Check whether a message should be handled.
     * @param \CharlotteDunois\Yasmin\Models\Message       $message
     * @param \CharlotteDunois\Yasmin\Models\Message|null  $oldMessage
     * @return bool
     */
    protected function shouldHandleMessage(\CharlotteDunois\Yasmin\Models\Message $message, \CharlotteDunois\Yasmin\Models\Message $oldMessage = null) {
        if($message->author->bot || $message->author->id === $this->client->user->id) {
            return false;
        }
        
        if($message->guild !== null && !$message->guild->available) {
            return false;
        }
        
        // Ignore messages from users that the bot is already waiting for input from
        if(\array_key_exists($message->author->id.'-'.$message->channel->id, $this->awaiting)) {
            return false;
        }
        
        if($oldMessage !== null && $message->content === $oldMessage->content) {
            return false;
        }
        
        $editableDuration = (int) $this->client->getOption('commandEditableDuration');
        if($message->editedTimestamp !== null && ($editableDuration <= 0 || ($message->editedTimestamp - $message->createdTimestamp) >= $editableDuration)) {
            return false;
        }
        
        return true;
    }
    
    /**
     * Inhibits a command message. Resolves with false or array (reason, ?response (Promise (-> Message), Message instance or null)).
     * @param \CharlotteDunois\Livia\Commands\Context  $message
     * @return \React\Promise\ExtendedPromiseInterface
     */
    protected function inhibit(\CharlotteDunois\Livia\Commands\Context $message) {
        return (new \React\Promise\Promise(function (callable $resolve, callable $reject) use ($message) {
            $promises = array();
            
            foreach($this->inhibitors as $inhib) {
                $inhibited = $inhib($message);
                if(!($inhibited instanceof \React\Promise\PromiseInterface)) {
                    if($inhibited === false) {
                        $inhibited = \React\Promise\resolve($inhibited);
                    } else {
                        $inhibited = \React\Promise\reject($inhibited);
                    }
                }
                
                $promises[] = $inhibited;
            }
            
            \React\Promise\all($promises)->done(function ($values) use ($resolve, $reject) {
                foreach($values as $value) {
                    if($value !== false) {
                        return $reject($value);
                    }
                }
                
                $resolve();
            }, $reject);
        }));
    }
    
    /**
     * Caches a command message to be editable.
     * @param \CharlotteDunois\Yasmin\Models\Message         $message     Triggering message.
     * @param \CharlotteDunois\Yasmin\Models\Message|null    $oldMessage  Triggering message's old version.
     * @param \CharlotteDunois\Livia\Commands\Context|null   $cmdContext  Command context to cache.
     * @param \CharlotteDunois\Yasmin\Models\Message[]|null  $responses   Responses to the message.
     * @return void
     */
    protected function cacheCommandMessage($message, $oldMessage, $cmdContext, $responses) {
        $duration = (int) $this->client->getOption('commandEditableDuration', 0);
        
        if($duration <= 0 || $cmdContext === null) {
            return;
        }
        
        if($responses !== null) {
            $this->results->set($message->id, $cmdContext);
            if($oldMessage === null) {
                $this->client->addTimer($duration, function () use ($message) {
                    $this->results->delete($message->id);
                });
            }
        } else {
            $this->results->delete($message->id);
        }
    }
    
    /**
     * Parses a message to find details about command usage in it.
     * @param \CharlotteDunois\Yasmin\Models\Message  $message
     * @return \CharlotteDunois\Livia\Commands\Context|null
     */
    protected function parseMessage(\CharlotteDunois\Yasmin\Models\Message $message) {
        // Find the command to run by patterns
        foreach($this->client->registry->commands as $command) {
            if($command->patterns === null) {
                continue;
            }
            
            foreach($command->patterns as $ptrn) {
                \preg_match($ptrn, $message->content, $matches);
                if(!empty($matches)) {
                    return (new \CharlotteDunois\Livia\Commands\Context($this->client, $message, $command, null, $matches));
                }
            }
        }
        
        $prefix = $this->client->getGuildPrefix($message->guild);
        if(empty($this->commandPatterns[$prefix])) {
            $this->buildCommandPattern($prefix);
        }
        
        $cmdMessage = $this->matchDefault($message, $this->commandPatterns[$prefix], 2);
        if(!$cmdMessage && $message->guild === null) {
            $cmdMessage = $this->matchDefault($message, '/^([^\s]+)/i');
        }
        
        return $cmdMessage;
    }
    
    /**
     * Matches a message against a guild command pattern.
     * @param \CharlotteDunois\Yasmin\Models\Message  $message
     * @param string                                  $pattern           The pattern to match against.
     * @param int                                     $commandNameIndex  The index of the command name in the pattern matches.
     * @return \CharlotteDunois\Livia\Commands\Context|null
     */
    protected function matchDefault(\CharlotteDunois\Yasmin\Models\Message $message, string $pattern, int $commandNameIndex = 1) {
        \preg_match($pattern, $message->content, $matches);
        if(!empty($matches)) {
            $commands = $this->client->registry->findCommands($matches[$commandNameIndex], true);
            if(\count($commands) !== 1 || $commands[0]->defaultHandling === false) {
                return (new \CharlotteDunois\Livia\Commands\Context($this->client, $message, null));
            }
            
            $argString = (string) \mb_substr($message->content, (\mb_strlen($matches[1]) + (!empty($matches[2]) ? \mb_strlen($matches[2]) : 0)));
            return (new \CharlotteDunois\Livia\Commands\Context($this->client, $message, $commands[0], $argString));
        }
        
        return null;
    }
    
    /**
     * Creates a regular expression to match the command prefix and name in a message.
     * @param string|null  $prefix
     * @return string
     * @internal
     */
    function buildCommandPattern(string $prefix = null) {
        $pattern = '';
        if($prefix !== null) {
            $escapedPrefix = \preg_quote($prefix, '/');
            $pattern = '/^(<@!?'.$this->client->user->id.'>\s+(?:'.$escapedPrefix.'\s*)?|'.$escapedPrefix.'\s*)([^\s]+)/iu';
        } else {
            $pattern = '/^(<@!?'.$this->client->user->id.'>\s+)([^\s]+)/iu';
        }
        
        $this->commandPatterns[$prefix] = $pattern;
        
        $this->client->emit('debug', 'Built command pattern for prefix "'.$prefix.'": '.$pattern);
        return $pattern;
    }
    
    /**
     * Gets the optional value of an awaiting context for the message.
     * @param \CharlotteDunois\Livia\Commands\Context  $context
     * @return mixed
     * @throws \RuntimeException  Thrown if the context does not exist.
     */
    function getAwaiting(\CharlotteDunois\Livia\Commands\Context $context) {
        if(!\array_key_exists($context->message->author->id.'-'.$context->message->channel->id, $this->awaiting)) {
            throw new \RuntimeException('Context does not exist');
        }
        
        return $this->awaiting[$context->message->author->id.'-'.$context->message->channel->id];
    }
    
    /**
     * Sets the awaiting context for the message with an optional value.
     * @param \CharlotteDunois\Livia\Commands\Context  $context
     * @param mixed                                    $value
     * @return void
     * @throws \RuntimeException  Thrown if the context is already awaiting.
     */
    function setAwaiting(\CharlotteDunois\Livia\Commands\Context $context, $value = null) {
        if(isset($this->awaiting[$context->message->author->id.'-'.$context->message->channel->id])) {
            throw new \RuntimeException('Context is already awaiting');
        }
        
        $this->awaiting[$context->message->author->id.'-'.$context->message->channel->id] = $value;
    }
    
    /**
     * Removes the awaiting context for the message.
     * @param \CharlotteDunois\Livia\Commands\Context  $context
     * @return void
     */
    function unsetAwaiting(\CharlotteDunois\Livia\Commands\Context $context) {
        unset($this->awaiting[$context->message->author->id.'-'.$context->message->channel->id]);
    }
    
    /**
     * Get all awaiting context values by a specific ID.
     * @param string  $id
     * @return mixed[]
     */
    function getAwaitingsByID(string $id) {
        $objs = array();
        
        foreach($this->awaiting as $key => $value) {
            if(\strpos($key, $id) !== false) {
                $objs[$key] = $value;
            }
        }
        
        return $objs;
    }
    
    /**
     * Throttles negative response messages (such as throttling, not a nsfw channel, command blocked, etc.). Used exclusively for and by `Commands\Context`.
     * @param \CharlotteDunois\Livia\Commands\Context  $context
     * @param string                                   $response
     * @param callable                                 $resolve
     * @param callable                                 $reject
     * @return void
     */
    function throttleNegativeResponseMessage(\CharlotteDunois\Livia\Commands\Context $context, string $response, callable $resolve, callable $reject) {
        if($context->command === null) {
            return $resolve(array());
        }
        
        $key = $context->message->author->id.'-'.$context->message->channel->id.'-'.$context->command->name;
        $timestamp = $this->negativeResponseThrottling[$key] ?? 0;
        $timeout = (int) $this->client->getOption('negativeResponseThrottlingDuration');
        
        if($timeout >= (\time() - $timestamp)) {
            return $resolve(array());
        }
        
        $this->negativeResponseThrottling[$key] = \time();
        $context->reply($response)->done($resolve, $reject);
    }
    
    /**
     * Cleans up too hold negative response messages (5 * duration).
     * @return void
     * @internal
     */
    function cleanupNegativeResponseMessages() {
        $current = \time();
        $timeout = 5 * ((int) $this->client->getOption('negativeResponseThrottlingDuration'));
        
        foreach($this->negativeResponseThrottling as $key => $time) {
            if(($current - $time) >= $timeout) {
                unset($this->negativeResponseThrottling[$key]);
            }
        }
    }
}


1			<?php
2			/**
3			* Livia
4			* Copyright 2017-2019 Charlotte Dunois, All Rights Reserved
5			*
6			* Website: https://charuru.moe
7			* License: https://github.com/CharlotteDunois/Livia/blob/master/LICENSE
8			*/
9
10			namespace CharlotteDunois\Livia;
11
12			/**
13			* Handles parsing messages and running commands from them.
14			*
15			* @property \CharlotteDunois\Livia\Client $client The client which initiated the instance.
16			*/
17			class CommandDispatcher implements \Serializable {
18			/**
19			* The client which initiated the instance.
20			* @var \CharlotteDunois\Livia\Client
21			*/
22			protected $client;
23
24			/**
25			* Functions that can block commands from running.
26			* @var callable[]
27			*/
28			protected $inhibitors = array();
29
30			/**
31			* AuthorID+ChannelID combination waiting for responses
32			* @var string[]
33			*/
34			protected $awaiting = array();
35
36			/**
37			* Patterns of command.
38			* @var string[]
39			*/
40			protected $commandPatterns = array();
41
42			/**
43			* Command results.
44			* @var \CharlotteDunois\Collect\Collection
45			*/
46			protected $results;
47
48			/**
49			* Contains an array of authorID-channelID-command => timestamps, used for throttling throttling or other some sort of "failure" messages.
50			* @var array
51			*/
52			protected $negativeResponseThrottling = array();
53
54			/**
55			* @internal
56			*/
57			function __construct(\CharlotteDunois\Livia\Client $client) {
58			$this->client = $client;
59
60			$this->results = new \CharlotteDunois\Collect\Collection();
61			}
62
63			/**
64			* @param string $name
65			* @return bool
66			* @throws \Exception
67			* @internal
68			*/
69			function __isset($name) {
70			try {
71			return $this->$name !== null;
72			} catch (\RuntimeException $e) {
73			if($e->getTrace()[0]['function'] === '__get') {
74			return false;
75			}
76
77			throw $e;
78			}
79			}
80
81			/**
82			* @param string $name
83			* @return mixed
84			* @throws \RuntimeException
85			* @internal
86			*/
87			function __get($name) {
88			if(\property_exists($this, $name)) {
89			return $this->$name;
90			}
91
92			throw new \RuntimeException('Unknown property '.\get_class($this).'::$'.$name);
93			}
94
95			/**
96			* @return string
97			* @internal
98			*/
99			function serialize() {
100			$vars = \get_object_vars($this);
101
102			unset($vars['client'], $vars['inhibitors']);
103
104			return \serialize($vars);
105			}
106
107			/**
108			* @return void
109			* @internal
110			*/
111			function unserialize($vars) {
112			if(\CharlotteDunois\Yasmin\Models\ClientBase::$serializeClient === null) {
113			throw new \Exception('Unable to unserialize a class without ClientBase::$serializeClient being set');
114			}
115
116			$vars = \unserialize($vars);
117
118			foreach($vars as $name => $val) {
119			$this->$name = $val;
120			}
121
122			$this->client = \CharlotteDunois\Yasmin\Models\ClientBase::$serializeClient;
123			}
124
125			/**
126			* Adds an inhibitor.
127			*
128			* The inhibitor is supposed to return false, if the command should not be blocked. Otherwise it should return a string (as reason) or an array, containing as first element the reason and as second element a Promise (which resolves to a Message), a Message instance or null.
129			* The inhibitor can return a Promise (for async computation), but has to resolve with `false` or reject with array or string.
130			*
131			* Callable specification:
132			* ```
133			* function (\CharlotteDunois\Livia\Commands\Context $message): array\|string\|false\|ExtendedPromiseInterface
134			* ```
135			*
136			* @param callable $inhibitor
137			* @return $this
138			*/
139			function addInhibitor(callable $inhibitor) {
140			if(!\in_array($inhibitor, $this->inhibitors, true)) {
141			$this->inhibitors[] = $inhibitor;
142			}
143
144			return $this;
145			}
146
147			/**
148			* Removes an inhibitor.
149			* @param callable $inhibitor
150			* @return $this
151			*/
152			function removeInhibitor(callable $inhibitor) {
153			$key = \array_search($inhibitor, $this->inhibitors, true);
154			if($key !== false) {
155			unset($this->inhibitors[$key]);
156			}
157
158			return $this;
159			}
160
161			/**
162			* Handles an incoming message.
163			* @param \CharlotteDunois\Yasmin\Models\Message $message
164			* @param \CharlotteDunois\Yasmin\Models\Message\|null $oldMessage
165			* @return \React\Promise\ExtendedPromiseInterface
166			*/
167			function handleMessage(\CharlotteDunois\Yasmin\Models\Message $message, \CharlotteDunois\Yasmin\Models\Message $oldMessage = null) {
168			return (new \React\Promise\Promise(function (callable $resolve) use ($message, $oldMessage) {
169			try {
170			if(!$this->shouldHandleMessage($message, $oldMessage)) {
171			return $resolve();
172			}
173
174			$cmdMessage = null;
175			$oldCmdMessage = null;
176
177			if($oldMessage !== null) {
178			$oldCmdMessage = $this->results->get($oldMessage->id);
179			if($oldCmdMessage === null && !$this->client->getOption('nonCommandEditable')) {
180			return $resolve();
181			}
182
183			$cmdMessage = $this->parseMessage($message);
184			if($cmdMessage && $oldCmdMessage) {
185			$cmdMessage->setResponses($oldCmdMessage->responses);
186			}
187			} else {
188			$cmdMessage = $this->parseMessage($message);
189			}
190
191			if($cmdMessage) {
192			$this->inhibit($cmdMessage)->done(function () use ($message, $oldMessage, $cmdMessage, $resolve) {
193			if($cmdMessage->command) {
194			if($cmdMessage->command->isEnabledIn($message->guild)) {
195			$cmdMessage->run()->done(function ($responses = null) use ($message, $oldMessage, $cmdMessage, $resolve) {
196			if($responses !== null && !\is_array($responses)) {
197			$responses = array($responses);
198			}
199
200			$cmdMessage->finalize($responses);
201			$this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
202			$resolve();
203			});
204			} else {
205			$message->reply('The command `'.$cmdMessage->command->name.'` is disabled.')->done(function ($response) use ($message, $oldMessage, $cmdMessage, $resolve) {
206			$responses = array($response);
207			$cmdMessage->finalize($responses);
208
209			$this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
210			$resolve();
211			});
212			}
213			} else {
214			$this->client->emit('unknownCommand', $cmdMessage);
215			if(((bool) $this->client->getOption('unknownCommandResponse', true))) {
216			$message->reply('Unknown command. Use '.\CharlotteDunois\Livia\Commands\Command::anyUsage('help').'.')->done(function ($response) use ($message, $oldMessage, $cmdMessage, $resolve) {
217			$responses = array($response);
218			$cmdMessage->finalize($responses);
219
220			$this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
221			$resolve();
222			});
223			}
224			}
225			}, function ($inhibited) use ($message, $oldMessage, $cmdMessage, $resolve) {
226			if(!\is_array($inhibited)) {
227			$inhibited = array($inhibited, null);
228			}
229
230			$this->client->emit('commandBlocked', $cmdMessage, $inhibited[0]);
231
232			if(!($inhibited[1] instanceof \React\Promise\PromiseInterface)) {
233			$inhibited[1] = \React\Promise\resolve($inhibited[1]);
234			}
235
236			$inhibited[1]->done(function ($responses) use ($message, $oldMessage, $cmdMessage, $resolve) {
237			if($responses !== null) {
238			$responses = array($responses);
239			}
240
241			$cmdMessage->finalize($responses);
242			$this->cacheCommandMessage($message, $oldMessage, $cmdMessage, $responses);
243			$resolve();
244			});
245			});
246			} elseif($oldCmdMessage) {
247			$oldCmdMessage->finalize(null);
248			if(!$this->client->getOption('nonCommandEditable')) {
249			$this->results->delete($message->id);
250			}
251
252			$this->cacheCommandMessage($message, $oldMessage, $cmdMessage, array());
253			$resolve();
254			}
255			} catch (\Throwable $error) {
256			$this->client->emit('error', $error);
257			throw $error;
258			}
259			}));
260			}
261
262			/**
263			* Check whether a message should be handled.
264			* @param \CharlotteDunois\Yasmin\Models\Message $message
265			* @param \CharlotteDunois\Yasmin\Models\Message\|null $oldMessage
266			* @return bool
267			*/
268			protected function shouldHandleMessage(\CharlotteDunois\Yasmin\Models\Message $message, \CharlotteDunois\Yasmin\Models\Message $oldMessage = null) {
269			if($message->author->bot \|\| $message->author->id === $this->client->user->id) {
270			return false;
271			}
272
273			if($message->guild !== null && !$message->guild->available) {
274			return false;
275			}
276
277			// Ignore messages from users that the bot is already waiting for input from
278			if(\array_key_exists($message->author->id.'-'.$message->channel->id, $this->awaiting)) {
279			return false;
280			}
281
282			if($oldMessage !== null && $message->content === $oldMessage->content) {
283			return false;
284			}
285
286			$editableDuration = (int) $this->client->getOption('commandEditableDuration');
287			if($message->editedTimestamp !== null && ($editableDuration <= 0 \|\| ($message->editedTimestamp - $message->createdTimestamp) >= $editableDuration)) {
288			return false;
289			}
290
291			return true;
292			}
293
294			/**
295			* Inhibits a command message. Resolves with false or array (reason, ?response (Promise (-> Message), Message instance or null)).
296			* @param \CharlotteDunois\Livia\Commands\Context $message
297			* @return \React\Promise\ExtendedPromiseInterface
298			*/
299			protected function inhibit(\CharlotteDunois\Livia\Commands\Context $message) {
300			return (new \React\Promise\Promise(function (callable $resolve, callable $reject) use ($message) {
301			$promises = array();
302
303			foreach($this->inhibitors as $inhib) {
304			$inhibited = $inhib($message);
305			if(!($inhibited instanceof \React\Promise\PromiseInterface)) {
306			if($inhibited === false) {
307			$inhibited = \React\Promise\resolve($inhibited);
308			} else {
309			$inhibited = \React\Promise\reject($inhibited);
310			}
311			}
312
313			$promises[] = $inhibited;
314			}
315
316			\React\Promise\all($promises)->done(function ($values) use ($resolve, $reject) {
317			foreach($values as $value) {
318			if($value !== false) {
319			return $reject($value);
320			}
321			}
322
323			$resolve();
324			}, $reject);
325			}));
326			}
327
328			/**
329			* Caches a command message to be editable.
330			* @param \CharlotteDunois\Yasmin\Models\Message $message Triggering message.
331			* @param \CharlotteDunois\Yasmin\Models\Message\|null $oldMessage Triggering message's old version.
332			* @param \CharlotteDunois\Livia\Commands\Context\|null $cmdContext Command context to cache.
333			* @param \CharlotteDunois\Yasmin\Models\Message[]\|null $responses Responses to the message.
334			* @return void
335			*/
336			protected function cacheCommandMessage($message, $oldMessage, $cmdContext, $responses) {
337			$duration = (int) $this->client->getOption('commandEditableDuration', 0);
338
339			if($duration <= 0 \|\| $cmdContext === null) {
340			return;
341			}
342
343			if($responses !== null) {
344			$this->results->set($message->id, $cmdContext);
345			if($oldMessage === null) {
346			$this->client->addTimer($duration, function () use ($message) {
347			$this->results->delete($message->id);
348			});
349			}
350			} else {
351			$this->results->delete($message->id);
352			}
353			}
354
355			/**
356			* Parses a message to find details about command usage in it.
357			* @param \CharlotteDunois\Yasmin\Models\Message $message
358			* @return \CharlotteDunois\Livia\Commands\Context\|null
359			*/
360			protected function parseMessage(\CharlotteDunois\Yasmin\Models\Message $message) {
361			// Find the command to run by patterns
362			foreach($this->client->registry->commands as $command) {
363			if($command->patterns === null) {
364			continue;
365			}
366
367			foreach($command->patterns as $ptrn) {
368			\preg_match($ptrn, $message->content, $matches);
369			if(!empty($matches)) {
370			return (new \CharlotteDunois\Livia\Commands\Context($this->client, $message, $command, null, $matches));
371			}
372			}
373			}
374
375			$prefix = $this->client->getGuildPrefix($message->guild);
376			if(empty($this->commandPatterns[$prefix])) {
377			$this->buildCommandPattern($prefix);
378			}
379
380			$cmdMessage = $this->matchDefault($message, $this->commandPatterns[$prefix], 2);
381			if(!$cmdMessage && $message->guild === null) {
382			$cmdMessage = $this->matchDefault($message, '/^([^\s]+)/i');
383			}
384
385			return $cmdMessage;
386			}
387
388			/**
389			* Matches a message against a guild command pattern.
390			* @param \CharlotteDunois\Yasmin\Models\Message $message
391			* @param string $pattern The pattern to match against.
392			* @param int $commandNameIndex The index of the command name in the pattern matches.
393			* @return \CharlotteDunois\Livia\Commands\Context\|null
394			*/
395			protected function matchDefault(\CharlotteDunois\Yasmin\Models\Message $message, string $pattern, int $commandNameIndex = 1) {
396			\preg_match($pattern, $message->content, $matches);
397			if(!empty($matches)) {
398			$commands = $this->client->registry->findCommands($matches[$commandNameIndex], true);
399			if(\count($commands) !== 1 \|\| $commands[0]->defaultHandling === false) {
400			return (new \CharlotteDunois\Livia\Commands\Context($this->client, $message, null));
401			}
402
403			$argString = (string) \mb_substr($message->content, (\mb_strlen($matches[1]) + (!empty($matches[2]) ? \mb_strlen($matches[2]) : 0)));
404			return (new \CharlotteDunois\Livia\Commands\Context($this->client, $message, $commands[0], $argString));
405			}
406
407			return null;
408			}
409
410			/**
411			* Creates a regular expression to match the command prefix and name in a message.
412			* @param string\|null $prefix
413			* @return string
414			* @internal
415			*/
416			function buildCommandPattern(string $prefix = null) {
417			$pattern = '';
418			if($prefix !== null) {
419			$escapedPrefix = \preg_quote($prefix, '/');
420			$pattern = '/^(<@!?'.$this->client->user->id.'>\s+(?:'.$escapedPrefix.'\s)?\|'.$escapedPrefix.'\s)([^\s]+)/iu';
421			} else {
422			$pattern = '/^(<@!?'.$this->client->user->id.'>\s+)([^\s]+)/iu';
423			}
424
425			$this->commandPatterns[$prefix] = $pattern;
426
427			$this->client->emit('debug', 'Built command pattern for prefix "'.$prefix.'": '.$pattern);
428			return $pattern;
429			}
430
431			/**
432			* Gets the optional value of an awaiting context for the message.
433			* @param \CharlotteDunois\Livia\Commands\Context $context
434			* @return mixed
435			* @throws \RuntimeException Thrown if the context does not exist.
436			*/
437			function getAwaiting(\CharlotteDunois\Livia\Commands\Context $context) {
438			if(!\array_key_exists($context->message->author->id.'-'.$context->message->channel->id, $this->awaiting)) {
439			throw new \RuntimeException('Context does not exist');
440			}
441
442			return $this->awaiting[$context->message->author->id.'-'.$context->message->channel->id];
443			}
444
445			/**
446			* Sets the awaiting context for the message with an optional value.
447			* @param \CharlotteDunois\Livia\Commands\Context $context
448			* @param mixed $value
449			* @return void
450			* @throws \RuntimeException Thrown if the context is already awaiting.
451			*/
452			function setAwaiting(\CharlotteDunois\Livia\Commands\Context $context, $value = null) {
453			if(isset($this->awaiting[$context->message->author->id.'-'.$context->message->channel->id])) {
454			throw new \RuntimeException('Context is already awaiting');
455			}
456
457			$this->awaiting[$context->message->author->id.'-'.$context->message->channel->id] = $value;
458			}
459
460			/**
461			* Removes the awaiting context for the message.
462			* @param \CharlotteDunois\Livia\Commands\Context $context
463			* @return void
464			*/
465			function unsetAwaiting(\CharlotteDunois\Livia\Commands\Context $context) {
466			unset($this->awaiting[$context->message->author->id.'-'.$context->message->channel->id]);
467			}
468
469			/**
470			* Get all awaiting context values by a specific ID.
471			* @param string $id
472			* @return mixed[]
473			*/
474			function getAwaitingsByID(string $id) {
475			$objs = array();
476
477			foreach($this->awaiting as $key => $value) {
478			if(\strpos($key, $id) !== false) {
479			$objs[$key] = $value;
480			}
481			}
482
483			return $objs;
484			}
485
486			/**
487			* Throttles negative response messages (such as throttling, not a nsfw channel, command blocked, etc.). Used exclusively for and by `Commands\Context`.
488			* @param \CharlotteDunois\Livia\Commands\Context $context
489			* @param string $response
490			* @param callable $resolve
491			* @param callable $reject
492			* @return void
493			*/
494			function throttleNegativeResponseMessage(\CharlotteDunois\Livia\Commands\Context $context, string $response, callable $resolve, callable $reject) {
495			if($context->command === null) {
496			return $resolve(array());
497			}
498
499			$key = $context->message->author->id.'-'.$context->message->channel->id.'-'.$context->command->name;
500			$timestamp = $this->negativeResponseThrottling[$key] ?? 0;
501			$timeout = (int) $this->client->getOption('negativeResponseThrottlingDuration');
502
503			if($timeout >= (\time() - $timestamp)) {
504			return $resolve(array());
505			}
506
507			$this->negativeResponseThrottling[$key] = \time();
508			$context->reply($response)->done($resolve, $reject);
509			}
510
511			/**
512			* Cleans up too hold negative response messages (5 * duration).
513			* @return void
514			* @internal
515			*/
516			function cleanupNegativeResponseMessages() {
517			$current = \time();
518			$timeout = 5 * ((int) $this->client->getOption('negativeResponseThrottlingDuration'));
519
520			foreach($this->negativeResponseThrottling as $key => $time) {
521			if(($current - $time) >= $timeout) {
522			unset($this->negativeResponseThrottling[$key]);
523			}
524			}
525			}
526			}
527

CharlotteDunois / Livia

CommandDispatcher::matchDefault() A last analyzed 2019-10-24 18:53 UTC

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Duplication

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CommandDispatcher::matchDefault() A
last analyzed 2019-10-24 18:53 UTC