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path: root/src/libjin-lua/scripts/log.lua
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------------------------------------------------------------------------------------------------------------------
-- https://github.com/rxi/log.lua
------------------------------------------------------------------------------------------------------------------

local log = { _version = "0.1.0" }

log.usecolor = false
log.outfile = nil
log.level = "trace"


local modes = {
  { name = "trace", color = "\27[34m", },
  { name = "debug", color = "\27[36m", },
  { name = "info",  color = "\27[32m", },
  { name = "warn",  color = "\27[33m", },
  { name = "error", color = "\27[31m", },
  { name = "fatal", color = "\27[35m", },
}


local levels = {}
for i, v in ipairs(modes) do
  levels[v.name] = i
end


local round = function(x, increment)
  increment = increment or 1
  x = x / increment
  return (x > 0 and math.floor(x + .5) or math.ceil(x - .5)) * increment
end


local _tostring = tostring

local tostring = function(...)
  local t = {}
  for i = 1, select('#', ...) do
	local x = select(i, ...)
	if type(x) == "number" then
	  x = round(x, .01)
	end
	t[#t + 1] = _tostring(x)
  end
  return table.concat(t, " ")
end


for i, x in ipairs(modes) do
  local nameupper = x.name:upper()
  log[x.name] = function(...)
	
	-- Return early if we're below the log level
	if i < levels[log.level] then
	  return
	end

	local msg = tostring(...)
	local info = debug.getinfo(2, "Sl")
	local lineinfo = info.short_src .. ":" .. info.currentline

	-- Output to console
	print(string.format("%s[%-6s%s]%s %s: %s",
						log.usecolor and x.color or "",
						nameupper,
						os.date("%H:%M:%S"),
						log.usecolor and "\27[0m" or "",
						lineinfo,
						msg))

	-- Output to log file
	if log.outfile then
	  local fp = io.open(log.outfile, "a")
	  local str = string.format("[%-6s%s] %s: %s\n",
								nameupper, os.date(), lineinfo, msg)
	  fp:write(str)
	  fp:close()
	end

  end
end

------------------------------------------------------------------------------------------------------------------
-- Export to Jin. 
------------------------------------------------------------------------------------------------------------------

jin.log = log