From 3db59345749db3edc45097962a3ade98211aa937 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@cryptonomic.net>
Date: Tue, 18 Apr 2023 10:46:12 -0400
Subject: add "test" subcommand

---
 go.sh | 47 ++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 40 insertions(+), 7 deletions(-)

diff --git a/go.sh b/go.sh
index e23404a..676718e 100755
--- a/go.sh
+++ b/go.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
-capacity_threshold=50
+default_capacity_threshold=50
+capacity_threshold_file=$HOME/.config/powerloss-handler/capacity_threshold
 
 battery_dir=/sys/class/power_supply/BAT0
 status_file=$battery_dir/status
@@ -8,6 +9,8 @@ capacity_file=$battery_dir/capacity
 UNIT=powerloss-handler
 CMD=$0
 
+FORCE_SUSPEND=
+
 self_install()
 {
     if systemctl --user is-active "$UNIT" >/dev/null
@@ -21,27 +24,51 @@ self_install()
                 -- "$CMD"
 }
 
-go()
+self_test()
+{
+    FORCE_SUSPEND=y
+    go
+    echo
+}
+
+do_suspend()
 {
+    systemctl suspend
+}
 
+go()
+{
     read capacity < "$capacity_file" || return
     case "$capacity" in
         '' | *[^0-9]*)
             echo "Error: unexpected value for battery capacity: $capacity" >&2
             return 1 ;;
     esac
-
     read status < "$status_file" || return
 
+    if [ "$FORCE_SUSPEND" ]
+    then
+        status=Discharging
+        capacity=0
+        echo 'Warning: test: pretending battery is discharging at 0% capacity' >&2
+    fi
+
     if [ -t 2 ]
     then
         printf '\r  %20s   %.2d%%\r' "$status" "$capacity" >&2
     fi
 
+    if [ -f "$capacity_threshold_file" ]
+    then
+        read capacity_threshold < "$capacity_threshold_file"
+    else
+        capacity_threshold=$default_capacity_threshold
+    fi
+
     [ "$status" = Discharging ] || return 0
     if [ "$capacity" -lt "$capacity_threshold" ]
     then
-        systemctl suspend
+        do_suspend
     fi
 }
 
@@ -61,9 +88,15 @@ main()
     done
 }
 
-if [ "$1" = install ]
+if [ $# = 0 ]
 then
-    self_install
-else
     main
+else
+    case "$1" in
+        install) self_install ;;
+        test) self_test ;;
+        *) echo "Error: unknown command: $*" >&2
+           exit 1
+           ;;
+    esac
 fi
-- 
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