- use logger

src/logger.cr

@@ -0,0 +1,55 @@
+require "./config"
+require "logger"
+require "colorize"
+
+LEVELS = ["debug", "error", "fatal", "info", "warn"]
+COLORS = [:light_cyan, :light_red, :red, :light_yellow, :light_magenta]
+
+class MLogger
+	def initialize(config : Config)
+		@logger = Logger.new STDOUT
+
+		@log_off = false
+		log_level = config.log_level
+		if log_level == "off"
+			@log_off = true
+			return
+		end
+
+		{% begin %}
+			case log_level
+				{% for lvl in LEVELS %}
+				when {{lvl}}
+					@logger.level = Logger::{{lvl.upcase.id}}
+				{% end %}
+			else
+				raise "Unknown log level #{log_level}"
+			end
+		{% end %}
+
+		@logger.formatter = Logger::Formatter.new do \
+			|severity, datetime, progname, message, io|
+
+			color = :default
+			{% begin %}
+				case severity.to_s().downcase
+					{% for lvl, i in LEVELS %}
+					when {{lvl}}
+						color = COLORS[{{i}}]
+					{% end %}
+				end
+			{% end %}
+
+			io << "[#{severity}]".ljust(8).colorize(color)
+			io << datetime.to_s("%Y/%m/%d %H:%M:%S") << " | "
+			io << message
+		end
+	end
+
+	{% for lvl in LEVELS %}
+		def {{lvl.id}}(msg)
+			return if @log_off
+			@logger.{{lvl.id}} msg
+		end
+	{% end %}
+end