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97 lines
2.1 KiB
Lua
97 lines
2.1 KiB
Lua
--[[--
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Logger module.
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See @{Logger.levels} for list of supported levels.
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Example:
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local logger = require("logger")
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logger.info("Something happened.")
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logger.err("House is on fire!")
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]]
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local dump = require("dump")
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local isAndroid, android = pcall(require, "android")
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local DEFAULT_DUMP_LVL = 10
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--- Supported logging levels
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-- @table Logger.levels
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-- @field dbg debug
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-- @field info informational (default level)
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-- @field warn warning
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-- @field err error
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local LOG_LVL = {
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dbg = 1,
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info = 2,
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warn = 3,
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err = 4,
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}
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local LOG_PREFIX = {
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dbg = 'DEBUG',
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info = 'INFO ',
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warn = 'WARN ',
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err = 'ERROR',
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}
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local noop = function() end
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local Logger = {
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levels = LOG_LVL,
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}
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local function log(log_lvl, dump_lvl, ...)
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local line = ""
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for i,v in ipairs({...}) do
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if type(v) == "table" then
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line = line .. " " .. dump(v, dump_lvl)
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else
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line = line .. " " .. tostring(v)
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end
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end
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if isAndroid then
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if log_lvl == "dbg" then
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android.LOGV(line)
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elseif log_lvl == "info" then
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android.LOGI(line)
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elseif log_lvl == "warn" then
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android.LOGW(line)
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elseif log_lvl == "err" then
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android.LOGE(line)
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end
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else
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io.stdout:write(os.date("%x-%X"), " ", LOG_PREFIX[log_lvl], line, "\n")
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io.stdout:flush()
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end
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end
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local LVL_FUNCTIONS = {
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dbg = function(...) log('dbg', DEFAULT_DUMP_LVL, ...) end,
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info = function(...) log('info', DEFAULT_DUMP_LVL, ...) end,
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warn = function(...) log('warn', DEFAULT_DUMP_LVL, ...) end,
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err = function(...) log('err', DEFAULT_DUMP_LVL, ...) end,
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}
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--[[--
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Set logging level. By default, level is set to info.
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@int new_lvl new logging level, must be one of the levels from @{Logger.levels}
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@usage
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Logger:setLevel(Logger.levels.warn)
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]]
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function Logger:setLevel(new_lvl)
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for lvl_name, lvl_value in pairs(LOG_LVL) do
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if new_lvl <= lvl_value then
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self[lvl_name] = LVL_FUNCTIONS[lvl_name]
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else
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self[lvl_name] = noop
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end
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end
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end
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Logger:setLevel(LOG_LVL.info)
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return Logger
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