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<?php |
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namespace ConfigToken; |
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use ConfigToken\TokenResolver\Exception\UnknownTokenSourceException; |
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/** |
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* Provides a method to inject the resolved token values collection back into the original string. |
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*/ |
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class TokenInjector |
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{ |
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/** |
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* Inject the resolved token values in the given string. |
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* |
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* @param string $string The string where to inject the resolved token values. |
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* @param TokenCollection $tokens The tokens. |
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* @param boolean $checkHash If true, the hash of the string must match the source hash of the tokens. |
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* @throws UnknownTokenSourceException |
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* @return string |
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*/ |
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public static function injectString($string, TokenCollection $tokens, $checkHash = False) { |
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if ($checkHash) { |
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$hash = md5($string); |
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1 |
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if ($tokens->hasSourceHash() && ($tokens->getSourceHash() !== $hash)) { |
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throw new UnknownTokenSourceException('Unable to inject tokens.'); |
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} |
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} |
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$offsets = array(); |
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$allTokens = $tokens->getArray(); |
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foreach ($allTokens as $tokenString => $token) { |
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$tokenOffsets = $token->getOffsets(); |
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foreach ($tokenOffsets as $offset) { |
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$offsets[$offset] = $tokenString; |
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} |
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} |
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ksort($offsets); |
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$blocks = array(); |
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$lastOffset = 0; |
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$offsetDelta = 0; |
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/** @var Token[] $injected */ |
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$injected = array(); |
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foreach ($offsets as $offset => $tokenString) { |
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/** @var Token $token */ |
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$token = $allTokens[$tokenString]; |
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if (!$token->getIsInjected()) { |
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$token->adjustOffset($offset, $offsetDelta); |
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if ($token->getIsResolved()) { |
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$tokenValue = $token->getTokenValue(); |
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$blocks[] = substr($string, $lastOffset, $offset - $lastOffset); |
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$blocks[] = $tokenValue; |
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$lastOffset = $offset + strlen($tokenString); |
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$offsetDelta += strlen($tokenValue) - strlen($tokenString); |
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$injected[$tokenString] = $token; |
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} |
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} |
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} |
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if ($lastOffset > 0) { |
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$blocks[] = substr($string, $lastOffset); |
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} |
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foreach ($injected as $token) { |
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$token->setIsInjected(true); |
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} |
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if (empty($blocks)) { |
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$newString = $string; |
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} else { |
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$newString = implode('', $blocks); |
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} |
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unset($string); |
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unset($blocks); |
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if ($checkHash) { |
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$tokens->setSourceHash(md5($newString)); |
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} |
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return $newString; |
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} |
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} |
liutec /
cfgtokenlib
