my WIP dzen / conky status bar

conkyrc.lua

conky.config = {
	out_to_x 						= false,
	out_to_console 					= true,
	update_interval 				= 1.0,
	total_run_times 				= 0,
	use_spacer 						= none,
	use_xft                      	= true,
    override_utf8_locale         	= true,
    font 							= 'Terminus:style = Regular:pixelsize=24:antialias=true'
}

---------------------------------
-- Static Colors
---------------------------------
local lightGrey 	= "\\#bcbcbc"
local darkGrey 		= "\\#262626"
local green 		= "\\#b5bd68"
local red 			= "\\#cc6666"
local yellow 		= "\\#f0c674"

---------------------------------
-- Utils
---------------------------------
-- the powerline left arrow (need to swap FG and BG colors first)
local arrow = "^fn(powerlinesymbols-12)^fn()"
local thinArrow = "^fn(powerlinesymbols-12)^fn()"

-- returns a string which will set the colors for dzen (^fg and ^bg)
function setColor(fg, bg)
	return "^fg(" .. fg .. ")^bg(" .. bg .. ")"
end

-- return a good font color for the given bg color.
function colorCompliment(col) 
	return darkGrey
end

---------------------------------
-- Dynamic Colors
---------------------------------
-- cutoffs must be provided in descending order
function setConditionalColor(field, cutoffs, reverse, alternateColor) 
	local ret = ""
	local first = true
	local endifs = ""
	for p in ipairs(cutoffs) do
		local color = cutoffs[p][1]
		local cutoff = cutoffs[p][2]
		if(alternateColor == nil) then
			alternateColor = colorCompliment(color)
		end
		if(first ~= true) then
			ret = ret .. "${else}"
		end
		ret = ret 
			.. "${if_match ${" .. field .."} >= " .. cutoff .. "}"
			.. setColor(
					reverse and color or alternateColor, 
					reverse and alternateColor or color)
		endifs = endifs .. "${endif}";
		first = false
	end
	ret = ret .. endifs
	return ret
end

---------------------------------
-- Sections
---------------------------------

-- CPU / RAM
local iconCpu = "^i(.dzen/bitmap/cpu.xbm)"
local iconRam = "^i(.dzen/bitmap/mem.xbm)"
local elemCpu = " " .. iconCpu .. " ${cpu}% "
local elemRam = " " .. iconRam .. " ${memperc}% "
local cpuCutoffs = { { red, 75 }, { yellow, 50 }, { green, 0 } }
local memCutoffs = { { red, 75 }, { yellow, 50 }, { green, 0 } }
local sectionCpuRam = 
	setConditionalColor("cpu", cpuCutoffs, true)	
	.. arrow 
	.. setConditionalColor("cpu", cpuCutoffs, false)
	.. elemCpu
	.. setConditionalColor("memperc", memCutoffs, false)
	.. elemRam
	.. arrow 
	.. setConditionalColor("memperc", memCutoffs, true)

-- Networking
local wifiColorCutoffs = { { green, 75 }, { yellow, 50 }, { red, 0 } }
local iconWifiQuality = 
	setConditionalColor("wireless_link_qual_perc wlo1", wifiColorCutoffs, true)
	.. "${if_match ${wireless_link_qual_perc wlo1} >= 75}"
	.. "^i(/home/ken/.dzen/bitmap/wifi_strength_3.xbm)"
	.. "${else}${if_match ${wireless_link_qual_perc wlo1} >= 50}"
	.. "^i(/home/ken/.dzen/bitmap/wifi_strength_2.xbm)"
	.. "${else}${if_match ${wireless_link_qual_perc wlo1} >= 25}"
	.. "^i(/home/ken/.dzen/bitmap/wifi_strength_1.xbm)"
	.. "${else}"
	.. "^i(/home/ken/.dzen/bitmap/wifi_strength_0.xbm)"
	.. "${endif}${endif}${endif}"
	.. setColor(lightGrey, darkGrey)
local iconNetDown = "^i(/home/ken/.dzen/bitmap/net_down_01.xbm)"

local sectionWifi = 
	" ${if_up wlo1}" 
	.. iconWifiQuality .. " "
	.. "${wireless_essid wlo1} "
	.. "${endif}"
local sectionNetworking = 
	setColor(lightGrey,darkGrey)
	.. iconNetDown .. " "
	.. "${downspeedf wlo1} "
	.. thinArrow
	.. " ${addr wlo1}  "
	.. thinArrow
	.. sectionWifi

-- Battery
-- TODO: use the icons for full / low / empty (or make a bar)
local iconFullBat 	= "^i(/home/ken/.dzen/bitmap/bat_full_01.xbm)"
local iconLowBat	= "^i(/home/ken/.dzen/bitmap/bat_low_01.xbm)"
local iconEmptyBat 	= "^i(/home/ken/.dzen/bitmap/bat_empty_01.xbm)"
local iconPlug 		= "^i(/home/ken/.dzen/bitmap/plug.xbm)"

local elemBatteryTime = [[${if_match "${battery_time}" == ""}]]
	..iconPlug.. " ${else} | ${battery_time} ${endif}"

local batteryCutOffs = { {green, 60}, {yellow, 10}, {red, 0} }
local sectionBattery = 
	setConditionalColor("battery_percent", batteryCutOffs, true)	
	.. arrow .. 
	setConditionalColor("battery_percent", batteryCutOffs, false)
	.. " ${battery_percent}% "  .. elemBatteryTime

---------------------------------
-- Output
---------------------------------
conky.text = sectionCpuRam .. sectionNetworking .. sectionBattery