Build rules from config.

internal/mappingrules/types.go

@@ -0,0 +1,27 @@
+package mappingrules
+
+import "github.com/holoplot/go-evdev"
+
+type MappingRule interface {
+	MatchEvent(*evdev.InputDevice, *evdev.InputEvent) *evdev.InputEvent
+}
+
+// A Simple Mapping Rule can map a button to a button or an axis to an axis.
+type SimpleMappingRule struct {
+	Input  RuleTarget
+	Output RuleTarget
+}
+
+// A Combo Mapping Rule can require multiple physical button presses for a single output button
+type ComboMappingRule struct {
+	Inputs []RuleTarget
+	Output RuleTarget
+	State  int
+}
+
+type RuleTarget struct {
+	Device   *evdev.InputDevice
+	Type     evdev.EvType
+	Code     evdev.EvCode
+	Inverted bool
+}