mirror of https://github.com/deavmi/dlog.git
49 lines
983 B
D
49 lines
983 B
D
module dlog.transform;
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import dlog.context : Context;
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/**
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* MessageTransform
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*
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* A message transform takes in text, applies
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* a transformation to it and outputs said text
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*
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* Transforms may be chained
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*/
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public abstract class MessageTransform
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{
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/* Next transformation (if any) */
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private MessageTransform chainedTransform;
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/**
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* The actual textual transformation.
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*
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* This is to be implemented by sub-classes
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*/
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public abstract string transform(string text, Context context);
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/**
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* Chain a transform
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*/
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public final void chain(MessageTransform transform)
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{
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chainedTransform = transform;
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}
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/**
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* Perform the transformation
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*/
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public final string execute(string text, Context context)
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{
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/* Perform the transformation */
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string transformedText = transform(text, context);
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/* If there is a chained transformation */
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if(chainedTransform)
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{
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transformedText = chainedTransform.execute(transformedText, context);
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}
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return transformedText;
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}
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} |