better structure

config/eww/Main/scripts/system

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+## Files and Data
+PREV_TOTAL=0
+PREV_IDLE=0
+cpuFile="/tmp/.cpu_usage"
+
+## Get CPU usage
+get_cpu() {
+	if [[ -f "${cpuFile}" ]]; then
+		fileCont=$(cat "${cpuFile}")
+		PREV_TOTAL=$(echo "${fileCont}" | head -n 1)
+		PREV_IDLE=$(echo "${fileCont}" | tail -n 1)
+	fi
+
+	CPU=(`cat /proc/stat | grep '^cpu '`) # Get the total CPU statistics.
+	unset CPU[0]                          # Discard the "cpu" prefix.
+	IDLE=${CPU[4]}                        # Get the idle CPU time.
+
+	# Calculate the total CPU time.
+	TOTAL=0
+
+	for VALUE in "${CPU[@]:0:4}"; do
+		let "TOTAL=$TOTAL+$VALUE"
+	done
+
+	if [[ "${PREV_TOTAL}" != "" ]] && [[ "${PREV_IDLE}" != "" ]]; then
+		# Calculate the CPU usage since we last checked.
+		let "DIFF_IDLE=$IDLE-$PREV_IDLE"
+		let "DIFF_TOTAL=$TOTAL-$PREV_TOTAL"
+		let "DIFF_USAGE=(1000*($DIFF_TOTAL-$DIFF_IDLE)/$DIFF_TOTAL+5)/10"
+		echo "${DIFF_USAGE}"
+	else
+		echo "?"
+	fi
+
+	# Remember the total and idle CPU times for the next check.
+	echo "${TOTAL}" > "${cpuFile}"
+	echo "${IDLE}" >> "${cpuFile}"
+}
+
+## Get Used memory
+get_mem() {
+	printf "%.0f\n" "$(free -m | grep Mem | awk '{print ($3/$2)*100}')"
+}
+
+## Get Volume
+get_vol() {
+    pamixer --get-volume
+}
+
+## Get Brightness
+get_brightness() {
+	if [ -z "$DISPLAY_DEVICE" ]; then
+		brightnessctl i --machine-readable | tr ',' ' ' | awk '{print $4}' | tr -d '%'
+	else
+		brightnessctl i -d $DISPLAY_DEVICE --machine-readable | tr ',' ' ' | awk '{print $4}' | tr -d '%'
+	fi
+}
+
+## Execute accordingly
+if [[ "$1" == "--cpu" ]]; then
+	get_cpu
+elif [[ "$1" == "--mem" ]]; then
+	get_mem
+elif [[ "$1" == "--vol" ]]; then
+	get_vol
+elif [[ "$1" == "--bri" ]]; then
+	get_brightness
+fi