From bf8f3057eb68d2f973cd5cec03c58675ae9b763b Mon Sep 17 00:00:00 2001
From: Patrick Spek <p.spek@tyil.nl>
Date: Mon, 20 Apr 2020 13:23:11 +0200
Subject: Initial commit

---
 lib/Log/Colored.rakumod | 192 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 192 insertions(+)
 create mode 100644 lib/Log/Colored.rakumod

(limited to 'lib')

diff --git a/lib/Log/Colored.rakumod b/lib/Log/Colored.rakumod
new file mode 100644
index 0000000..b22a098
--- /dev/null
+++ b/lib/Log/Colored.rakumod
@@ -0,0 +1,192 @@
+#! /usr/bin/env false
+
+use v6.d;
+
+use Log::Implementation;
+use Log::Level;
+use Terminal::ANSIColor;
+
+#| An implementation of Log with colors.
+unit class Log::Colored is Log::Implementation;
+
+#| An array of hashes. Each has must have a handle key, with an IO::Handle to
+#| print messages to. A level key with an integer to signify a Log::Level is
+#| also required.
+has @!outputs;
+
+#| A supplier to emit messages to.
+has Supplier $!messages;
+
+#| Send an emergency message.
+multi method emergency (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message($message, 'bold underline red'),
+		level => 0,
+	})
+}
+
+#| Send an alert message.
+multi method alert (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message($message, 'bold red'),
+		level => 1,
+	})
+}
+
+#| Send a critical message.
+multi method critical (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message($message, 'red'),
+		level => 2,
+	})
+}
+
+#| Send an error message.
+multi method error (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message($message, 'bold yellow'),
+		level => 3,
+	})
+}
+
+#| Send a warning message.
+multi method warning (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message($message, 'yellow'),
+		level => 4,
+	})
+}
+
+#| Send a notice message. This is the "normal" level to publish log entries on.
+multi method notice (
+	#| The message to print.
+	Str:D $message
+) {
+	$!messages.emit({
+		message => self!message($message, 'default'),
+		level => 5,
+	})
+}
+
+#| Send an informational message.
+multi method info (
+	#| The message to print.
+	Str:D $message
+) {
+	$!messages.emit({
+		message => self!message($message, 'cyan'),
+		level => 6,
+	})
+}
+
+#| Send a debug message.
+multi method debug (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message($message, 'black'),
+		level => 7,
+	})
+}
+
+#| Add an output to the logger.
+multi method add-output (
+	#| The IO::Handle to write log messages to.
+	IO::Handle:D $handle,
+
+	#| The log level for this particular stream.
+	Int() $level where Log::Level::Emergency ≤ * ≤ Log::Level::Debug,
+
+	#| A filter function to apply to any messages sent to the output.
+	Callable :$filter?,
+) {
+	@!outputs.push({
+		:$handle,
+		:$level,
+		:$filter,
+	});
+}
+
+#| Convenience method to get the callee name. This is the package name if one
+#| exists, or the source file name.
+method !callee (
+	#| The depth of which to get the callframe.
+	Int:D $depth = 4,
+
+	--> Str
+) {
+	my $file = callframe($depth).annotations<file>;
+
+	return $file unless $file.ends-with(')');
+
+	$file.words.tail.substr(1, *-1);
+}
+
+#| Convenience method for formatting the message as desired.
+method !message (
+	#| The original message to be logged.
+	Str:D $message,
+
+	#| A human readable identifier for the level.
+	Str:D $color,
+
+	--> Str
+) {
+	colored("{DateTime.now.utc} {self!callee}: $message", $color);
+}
+
+submethod TWEAK
+{
+	# Set up the Supply for messages.
+	$!messages .= new;
+	$!messages.Supply.tap(sub (%payload) {
+		@!outputs
+			.race
+			.grep(%payload<level> ≤ *<level>)
+			.grep({ $_<filter> ?? $_<filter>(%payload).so !! True })
+			.map(*<handle>.say(%payload<message>))
+			;
+	});
+}
+
+=begin pod
+
+=NAME    Log::Colored
+=VERSION 0.1.1
+=AUTHOR  Patrick Spek <p.spek@tyil.nl>
+
+=begin LICENSE
+Copyright © 2020
+
+This program is free software: you can redistribute it and/or modify it under
+the terms of the GNU Lesser General Public License as published by the Free
+Software Foundation, version 3.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program.  If not, see http://www.gnu.org/licenses/.
+=end LICENSE
+
+=end pod
+
+# vim: ft=raku noet sw=8 ts=8
-- 
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