feat(audio-switcher): support input ports (#287)

audio-switcher/tests/input_ports_test.lua

@@ -0,0 +1,36 @@
+local sourceFile = assert(io.open("service.luau", "rb"))
+local source = sourceFile:read("*a")
+sourceFile:close()
+
+local beginMarker = "-- BEGIN INPUT PORT HELPERS"
+local endMarker = "-- END INPUT PORT HELPERS"
+local beginAt = assert(source:find(beginMarker, 1, true), "input port helper start marker missing")
+local bodyAt = assert(source:find("\n", beginAt, true)) + 1
+local endAt = assert(source:find(endMarker, bodyAt, true), "input port helper end marker missing")
+local helperSource = source:sub(bodyAt, endAt - 1)
+local loader = assert(load(helperSource .. "\nreturn parseInputPorts", "input port helpers", "t", _G))
+local parseInputPorts = loader()
+
+local ports, active = parseInputPorts({
+  active_port = "analog-input-internal-mic",
+  ports = {
+    { name = "analog-input-internal-mic", description = "Internal Microphone", availability = "available" },
+    { name = "analog-input-headset-mic", description = "Headset Microphone", availability = "not available" },
+    { name = "analog-input-mic", description = "Microphone", availability = "unknown" },
+  },
+})
+
+assert(active == "analog-input-internal-mic")
+assert(#ports == 3)
+assert(ports[1].active and ports[1].available and ports[1].description == "Internal Microphone")
+assert(not ports[2].active and not ports[2].available and ports[2].description == "Headset Microphone")
+assert(ports[3].available, "unknown availability should remain selectable")
+
+local objectPorts, objectActive = parseInputPorts({
+  active_port = { name = "mic" },
+  ports = { { name = "mic", description = "", availability = "available" } },
+})
+assert(objectActive == "mic" and objectPorts[1].active)
+assert(objectPorts[1].description == "mic", "port name should be the description fallback")
+
+print("audio input port tests: ok")