1 files changed, 43 insertions, 0 deletions
diff --git a/sys/battery_alert.sh b/sys/battery_alert.sh
new file mode 100755
index 0000000..47fa556
--- /dev/null
+++ b/sys/battery_alert.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+# Send a notification if the laptop battery is either low or is fully charged.
+
+# Battery percentage at which to notify
+WARNING_LEVEL=78
+CRITICAL_LEVEL=5
+BATTERY_DISCHARGING=$(acpi -b | grep "Battery 0" | grep -c "Discharging")
+BATTERY_LEVEL=$(acpi -b | grep "Battery 0" | grep -P -o '[0-9]+(?=%)')
+
+# Use files to store whether we've shown a notification or not (to prevent multiple notifications)
+FULL_FILE=/tmp/batteryfull
+EMPTY_FILE=/tmp/batteryempty
+CRITICAL_FILE=/tmp/batterycritical
+
+# Reset notifications if the computer is charging/discharging
+if [ "$BATTERY_DISCHARGING" -eq 1 ]; then
+    # Battery is discharging
+    if [ -f "$FULL_FILE" ]; then
+        command rm "$FULL_FILE"
+    fi
+    if [ "$BATTERY_LEVEL" -le "$WARNING_LEVEL" ] && [ ! -f "$EMPTY_FILE" ]; then
+        notify-send "Low Battery" "${BATTERY_LEVEL}% of battery remaining." -u critical -i "battery-low-symbolic" -r 9991
+        touch "$EMPTY_FILE"
+    fi
+    if [ "$BATTERY_LEVEL" -le "$CRITICAL_LEVEL" ] && [ ! -f "$CRITICAL_FILE" ]; then
+        notify-send "Battery Critical" "The computer will shut down soon." -u critical -i "battery-caution-symbolic" -r 9991
+        touch "$CRITICAL_FILE"
+    fi
+elif [ "$BATTERY_DISCHARGING" -eq 0 ]; then
+    # Battery is charging
+    if [ "$BATTERY_LEVEL" -gt 99 ] && [ ! -f "$FULL_FILE" ]; then
+        notify-send "Battery Charged" "Battery is fully charged." -i "battery-full-symbolic" -r 9991
+        touch "$FULL_FILE"
+    fi
+    # Reset empty/critical notifications when charging begins
+    if [ -f "$EMPTY_FILE" ]; then
+        command rm "$EMPTY_FILE"
+    fi
+    if [ -f "$CRITICAL_FILE" ]; then
+        command rm "$CRITICAL_FILE"
+    fi
+fi