1 files changed, 62 insertions, 0 deletions
diff --git a/.config/awesome/quarrel/persistent.lua b/.config/awesome/quarrel/persistent.lua
new file mode 100644
index 0000000..2b15c89
--- /dev/null
+++ b/.config/awesome/quarrel/persistent.lua
@@ -0,0 +1,62 @@
+local gdebug = require "gears.debug"
+local qfs = require "quarrel.fs"
+local qjson = require "quarrel.json"
+
+awesome.register_xproperty("is_restart", "boolean")
+
+---@alias QPersistentValue string|number|table|nil|boolean
+
+---@class QuarrelPersistent
+local qpersistent = {}
+
+---@type table<string, QPersistentValue>
+local inner = {}
+
+--- Store a key-value pair in a persistent store
+---@param key string
+---@param value QPersistentValue
+function qpersistent.store(key, value)
+    inner[key] = value
+end
+
+--- Get a key-value pair in a persistent store
+---@param key string
+---@return QPersistentValue
+function qpersistent.get(key)
+    return inner[key]
+end
+
+--- Check if there was a restart
+---@return boolean
+function qpersistent.is_restart()
+    return awesome.get_xproperty "is_restart" ~= nil
+end
+
+do
+    local ok, content = pcall(qfs.read, "/tmp/qpersistent-store")
+
+    if not ok and not qpersistent.is_restart() then
+        gdebug.print_error "failed to read persistent store"
+        inner = {}
+    else
+        inner = qjson.decode(content)
+    end
+end
+
+awesome.connect_signal("exit", function(restart)
+    if not restart then
+        return
+    end -- we probably errored
+
+    local ok = pcall(qfs.write, qjson.encode(inner), "/tmp/qpersistent-store")
+    if not ok then
+        gdebug.print_error "failed to open persistent store"
+        return
+    end
+
+    if not qpersistent.is_restart() then
+        awesome.set_xproperty("is_restart", true)
+    end
+end)
+
+return qpersistent