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<?php |
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declare(strict_types=1); |
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namespace EngineWorks\Templates\Plugins; |
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use EngineWorks\Templates\Plugin; |
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class Transliterate implements Plugin |
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{ |
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/** |
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* @return array{tr: string} |
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*/ |
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public function getCallablesTable(): array |
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{ |
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return [ |
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'tr' => 'transliterate', |
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]; |
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} |
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/** @var callable */ |
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private $defaultEncoder; |
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/** |
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* Transliterate constructor. |
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* |
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* @param callable|null $defaultEncoder If the default encoder is null then a null encoder is used |
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*/ |
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public function __construct(callable $defaultEncoder = null) |
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{ |
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$this->setDefaultEncoder($defaultEncoder ? : [static::class, 'nullEncoder']); |
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} |
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/** |
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* Uses a message and replace its keywords with the provided in $arguments |
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* |
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* The message can be an object, it will be translated to a string using valueToSting |
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* The message should include the keywords to replace in curly braces, like: |
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* Welcome to {city}, enjoy! |
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* |
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* Every argument that is included into the message is evaluated to a string |
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* (using valueToString) and then is passed to the encoder. |
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* |
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* If the encoder is null then uses the default encoder. |
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* |
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* @param string $message String with elements using '{key}' template |
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* @param array<string, mixed> $arguments Key/value array with the replacements |
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* @param callable|null $encoder function to use for encode |
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*/ |
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public function transliterate(string $message, array $arguments = [], callable $encoder = null): string |
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{ |
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// put message as string |
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$message = $this->valueToString($message); |
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// if there are no arguments then exit |
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if ('' === $message || 0 == count($arguments)) { |
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return $message; |
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} |
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// create encoded arguments (only included if they exist in matches) |
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$encodedArguments = []; |
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$encoder = ($encoder) ? : $this->getDefaultEncoder(); |
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foreach ($arguments as $key => $value) { |
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$transKey = '{' . $key . '}'; |
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if (false === strpos($message, $transKey)) { |
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continue; |
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} |
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$encodedArguments[$transKey] = call_user_func($encoder, $this->valueToString($value)); |
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} |
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// if there are any encoded arguments then exit |
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if (! count($encodedArguments)) { |
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return $message; |
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} |
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// translit using strtr php function |
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return strtr($message, $encodedArguments); |
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} |
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/** |
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* Retrieve the keys inside the curly braces |
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* If the keys are duplicated they are removed, therefore, |
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* if you need consecutive keys then use array_values function |
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* |
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* @return string[] |
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*/ |
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public function getCurlyBracesKeys(string $message): array |
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{ |
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if ('' === trim($message)) { |
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return []; |
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} |
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// preg_match_all return 0 if not found, false on error |
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if (! preg_match_all('/({(?<={)[^{}\r\n]+?(?=})})/U', $message, $matches)) { |
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return []; |
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} |
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return array_unique($matches[0]); |
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} |
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/** |
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* Convert a value to string, if the value is: |
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* scalar or object with method __toString() then the string cast |
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* array or traversable then iterates the object converting every member and concat the result |
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* else empty string |
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* |
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* @param mixed $value |
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*/ |
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public function valueToString($value): string |
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{ |
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if (is_null($value) || is_scalar($value) || (is_object($value) && is_callable([$value, '__toString']))) { |
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return (string) $value; |
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} |
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if (is_iterable($value)) { |
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$buffer = []; |
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foreach ($value as $innerValue) { |
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$buffer[] = $this->valueToString($innerValue); |
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} |
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return implode('', $buffer); |
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} |
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return ''; |
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} |
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public function getDefaultEncoder(): callable |
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{ |
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return $this->defaultEncoder; |
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} |
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/** |
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* @param callable(string):string $defaultEncoder |
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*/ |
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public function setDefaultEncoder(callable $defaultEncoder): void |
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{ |
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$this->defaultEncoder = $defaultEncoder; |
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} |
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/** |
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* Function to setup a null encoder |
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*/ |
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public static function nullEncoder(string $string): string |
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{ |
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return $string; |
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} |
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} |
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