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83 lines
1.9 KiB
Lua
83 lines
1.9 KiB
Lua
3 years ago
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--[=[
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@c Logger
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@t ui
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@mt mem
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@p level number
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@p dateTime string
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@op file string
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@d Used to log formatted messages to stdout (the console) or to a file.
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The `dateTime` argument should be a format string that is accepted by `os.date`.
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The file argument should be a relative or absolute file path or `nil` if no log
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file is desired. See the `logLevel` enumeration for acceptable log level values.
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]=]
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local fs = require('fs')
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local date = os.date
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local format = string.format
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local stdout = _G.process.stdout.handle
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local openSync, writeSync = fs.openSync, fs.writeSync
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-- local BLACK = 30
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local RED = 31
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local GREEN = 32
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local YELLOW = 33
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-- local BLUE = 34
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-- local MAGENTA = 35
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local CYAN = 36
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-- local WHITE = 37
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local config = {
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{'[ERROR] ', RED},
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{'[WARNING]', YELLOW},
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{'[INFO] ', GREEN},
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{'[DEBUG] ', CYAN},
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}
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do -- parse config
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local bold = 1
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for _, v in ipairs(config) do
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v[2] = format('\27[%i;%im%s\27[0m', bold, v[2], v[1])
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end
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end
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local Logger = require('class')('Logger')
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function Logger:__init(level, dateTime, file)
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self._level = level
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self._dateTime = dateTime
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self._file = file and openSync(file, 'a')
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end
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--[=[
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@m log
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@p level number
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@p msg string
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@p ... *
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@r string
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@d If the provided level is less than or equal to the log level set on
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initialization, this logs a message to stdout as defined by Luvit's `process`
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module and to a file if one was provided on initialization. The `msg, ...` pair
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is formatted according to `string.format` and returned if the message is logged.
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]=]
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function Logger:log(level, msg, ...)
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if self._level < level then return end
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local tag = config[level]
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if not tag then return end
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msg = format(msg, ...)
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local d = date(self._dateTime)
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if self._file then
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writeSync(self._file, -1, format('%s | %s | %s\n', d, tag[1], msg))
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end
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stdout:write(format('%s | %s | %s\n', d, tag[2], msg))
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return msg
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end
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return Logger
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