Add low battery warning

2 files changed, 32 insertions, 7 deletions

diff --git a/.config/awesome/battery.lua b/.config/awesome/battery.lua
index 9761354..772ed46 100644
--- a/.config/awesome/battery.lua
+++ b/.config/awesome/battery.lua
@@ -31,7 +31,7 @@ local status_text = {
   ["unknown"] = "⌁"
 }
 
-local battery = { mt = {} }
+local battery = { mt = {}, status_callback = nil }
 
 -- {{{ upower backend
 local tonumber = tonumber
@@ -212,6 +212,10 @@ local function update(force)
 
     local battery_status
 
+    if battery.status_callback then
+      battery.status_callback(bat)
+    end
+
     if blinking and inverted then
       battery_status = status .. ' ' .. awful.util.escape(tostring(bat.charge)) .. '%'
     else
diff --git a/.config/awesome/mcrute.lua b/.config/awesome/mcrute.lua
index 62b83ae..f0a9bcd 100644
--- a/.config/awesome/mcrute.lua
+++ b/.config/awesome/mcrute.lua
@@ -60,12 +60,33 @@ function string_split(s, delimiter)
     return result
 end
 
--- TODO: figure out how to notify when below 5%
-function battery_low_warning()
-    naughty.notify({ preset = naughty.config.presets.critical,
-                     title = "Battery Low",
-                     icon = "battery-empty",
-                     icon_size = 256 })
+local battery_warning_delivered = false
+
+require("battery").status_callback = function(bat)
+    local should_warn = bat.charge <= 10 and (bat.status == 'discharging' or bat.status == 'not connected')
+    local be_persistent =  bat.charge <= 5 and (bat.status == 'discharging' or bat.status == 'not connected')
+
+    if battery_warning_delivered and bat.status ~= 'discharging' then
+        battery_warning_delivered = false
+    end
+
+    -- Just one notification below 10% should be enough to get us to an outlet
+    if should_warn and not battery_warning_delivered then
+        naughty.notify({ preset = naughty.config.presets.critical,
+                         title = "Battery Low",
+                         icon = "battery-empty",
+                         icon_size = 256 })
+        battery_warning_delivered = true
+    end
+
+    -- But if we make it to 5% then we're in danger of shutting down or
+    -- suspending imminently so start being annoying
+    if be_persistent then
+        naughty.notify({ preset = naughty.config.presets.critical,
+                         title = "Battery Low",
+                         icon = "battery-empty",
+                         icon_size = 256 })
+    end
 end
 
 -- TODO: