mirror of https://github.com/nocturn9x/nimd.git
126 lines
5.7 KiB
Nim
126 lines
5.7 KiB
Nim
# Copyright 2021 Mattia Giambirtone & All Contributors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# A simple logging module inspired by python's own logging facility
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import terminal
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import strformat
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import times
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type
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LogLevel* = enum
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Trace = 0,
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Debug = 10,
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Info = 20,
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Warning = 30,
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Error = 40,
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Critical = 50,
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Fatal = 60
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LogHandler* = ref object of RootObj
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code: proc (self: LogHandler, logger: Logger, message: string)
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level: LogLevel
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StreamHandler* = ref object of LogHandler
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filename*: string
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file*: File
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Logger* = ref object
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level*: LogLevel
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handlers*: seq[LogHandler]
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const defaultLevel = LogLevel.Info
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proc log(self: Logger, level: LogLevel = defaultLevel, message: string) # Forward declaration
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# Simple one-line procedures
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proc trace*(self: Logger, message: string) = self.log(LogLevel.Trace, message)
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proc debug*(self: Logger, message: string) = self.log(LogLevel.Debug, message)
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proc info*(self: Logger, message: string) = self.log(LogLevel.Info, message)
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proc warning*(self: Logger, message: string) = self.log(LogLevel.Warning, message)
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proc error*(self: Logger, message: string) = self.log(LogLevel.Error, message)
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proc critical*(self: Logger, message: string) = self.log(LogLevel.Critical, message)
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proc fatal*(self: Logger, message: string) = self.log(LogLevel.Fatal, message)
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proc newLogger*(level: LogLevel = defaultLevel, handlers: seq[LogHandler] = @[]): Logger = Logger(level: level, handlers: handlers)
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proc setLevel*(self: Logger, level: LogLevel) = self.level = level
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proc getLevel*(self: Logger): LogLevel = self.level
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proc createHandler*(procedure: proc (self: LogHandler, logger: Logger, message: string), level: LogLevel): LogHandler = LogHandler(code: procedure, level: level)
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proc createStreamHandler*(procedure: proc (self: LogHandler, logger: Logger, message: string), level: LogLevel, filename: string): StreamHandler = StreamHandler(code: procedure, level: level, filename: filename, file: open(filename, fmWrite))
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proc addHandler*(self: Logger, handler: LogHandler) = self.handlers.add(handler)
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proc removeHandler*(self: Logger, handler: LogHandler) = self.handlers.delete(self.handlers.find(handler))
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proc log(self: Logger, level: LogLevel = defaultLevel, message: string) =
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## Generic utility for logging on any level
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for handler in self.handlers:
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if handler.level == level and self.level <= level:
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handler.code(handler, self, message)
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proc getDefaultLogger*(): Logger =
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## Gets a simple logger with level set
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## to LogLevel.Info and one handler per
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## level that writes the given message to the
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## standard error with some basic info like the
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## current date and time and the log level
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setStdIoUnbuffered() # Just in case
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proc logTrace(self: LogHandler, logger: Logger, message: string) =
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setForegroundColor(fgMagenta)
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stderr.writeLine(&"""[{fromUnix(getTime().toUnixFloat().int).format("d/M/yyyy HH:mm:ss")} - TRACE] {message}""")
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setForegroundColor(fgDefault)
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proc logDebug(self: LogHandler, logger: Logger, message: string) =
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setForegroundColor(fgCyan)
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stderr.writeLine(&"""[{fromUnix(getTime().toUnixFloat().int).format("d/M/yyyy HH:mm:ss")} - DEBUG] {message}""")
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setForegroundColor(fgDefault)
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proc logInfo(self: LogHandler, logger: Logger, message: string) =
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setForegroundColor(fgGreen)
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stderr.writeLine(&"""[{fromUnix(getTime().toUnixFloat().int).format("d/M/yyyy HH:mm:ss")} - INFO] {message}""")
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setForegroundColor(fgDefault)
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proc logWarning(self: LogHandler, logger: Logger, message: string) =
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setForegroundColor(fgYellow)
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stderr.writeLine(&"""[{fromUnix(getTime().toUnixFloat().int).format("d/M/yyyy HH:mm:ss")} - WARNING] {message}""")
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setForegroundColor(fgDefault)
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proc logError(self: LogHandler, logger: Logger, message: string) =
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setForegroundColor(fgRed)
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stderr.writeLine(&"""[{fromUnix(getTime().toUnixFloat().int).format("d/M/yyyy HH:mm:ss")} - ERROR] {message}""")
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setForegroundColor(fgDefault)
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proc logCritical(self: LogHandler, logger: Logger, message: string) =
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setForegroundColor(fgRed)
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stderr.writeLine(&"""[{fromUnix(getTime().toUnixFloat().int).format("d/M/yyyy HH:mm:ss")} - CRITICAL] {message}""")
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setForegroundColor(fgDefault)
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proc logFatal(self: LogHandler, logger: Logger, message: string) =
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setForegroundColor(fgBlack)
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setBackgroundColor(bgRed)
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stderr.write(&"""[{fromUnix(getTime().toUnixFloat().int).format("d/M/yyyy HH:mm:ss")} - FATAL]""")
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setForegroundColor(fgRed)
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setBackgroundColor(bgDefault)
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stderr.writeline(&" {message}")
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setForegroundColor(fgDefault)
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result = newLogger()
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result.addHandler(createHandler(logTrace, LogLevel.Trace))
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result.addHandler(createHandler(logDebug, LogLevel.Debug))
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result.addHandler(createHandler(logInfo, LogLevel.Info))
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result.addHandler(createHandler(logWarning, LogLevel.Warning))
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result.addHandler(createHandler(logError, LogLevel.Error))
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result.addHandler(createHandler(logCritical, LogLevel.Critical))
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result.addHandler(createHandler(logFatal, LogLevel.Fatal))
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