mirror of https://github.com/deavmi/dlog.git
106 lines
2.5 KiB
D
106 lines
2.5 KiB
D
/**
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* Core module containing types pertaining to the base Logger
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* class and base MessageTransform class (along with a default
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* transform, DefaultTransform)
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*/
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module dlog.core;
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import std.conv : to;
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import std.range : join;
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import dlog.transform : MessageTransform;
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import dlog.defaults;
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/**
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* Logger
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*
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* Represents a logger instance
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*/
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public class Logger
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{
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/* Starting transformation */
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private MessageTransform messageTransform;
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/* The multiple argument joiner */
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private string multiArgJoiner;
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/**
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* Constructs a new Logger with the default
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* MessageTransform, see TODO (ref module)
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*/
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this(string multiArgJoiner = " ")
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{
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this(new DefaultTransform(), multiArgJoiner);
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}
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/**
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* Constructs a new Logger with the given
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* MessageTransform
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*/
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this(MessageTransform messageTransform, string multiArgJoiner = " ")
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{
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this.messageTransform = messageTransform;
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this.multiArgJoiner = multiArgJoiner;
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}
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/**
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* Log a message
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*/
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public final void log(TextType...)(TextType message, string c1 = __FILE_FULL_PATH__,
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string c2 = __FILE__, ulong c3 = __LINE__,
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string c4 = __MODULE__, string c5 = __FUNCTION__,
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string c6 = __PRETTY_FUNCTION__, string[] contextExtras = null)
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{
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/* Construct context array */
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string[] context = [c1, c2, to!(string)(c3), c4, c5, c6]~contextExtras;
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/* Grab at compile-time all arguments and generate runtime code to add them to `components` */
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string[] components;
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static foreach(messageComponent; message)
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{
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components ~= to!(string)(messageComponent);
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}
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/* Join all `components` into a single string */
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string messageOut = join(components, multiArgJoiner);
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/* Apply the transformation on the message */
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string transformedMesage = messageTransform.execute(messageOut, context);
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/* Call the underlying logger implementation */
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logImpl(transformedMesage);
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}
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/**
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* Logging implementation, this is where the fina
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* transformed text will be transferred to and finally
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* logged
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*/
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protected abstract void logImpl(string message);
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}
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/**
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* Tests the DefaultLogger
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*/
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unittest
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{
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Logger logger = new DefaultLogger();
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import std.meta;
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alias testParameters = AliasSeq!("This is a log message", 1.1, true, [1,2,3], 'f', logger);
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// Test various types one-by-one
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static foreach(testParameter; testParameters)
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{
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logger.log(testParameter);
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}
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// Test various parameters (of various types) all at once
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logger.log(testParameters);
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// Same as above but with a custom joiner set
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logger = new DefaultLogger("(-)");
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logger.log(testParameters);
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} |