1 files changed, 63 insertions, 0 deletions
diff --git a/client-web/source/preferences.ts b/client-web/source/preferences.ts
new file mode 100644
index 0000000..e7fc7bb
--- /dev/null
+++ b/client-web/source/preferences.ts
@@ -0,0 +1,63 @@
+
+export interface PrefDecl<T> {
+    name: string,
+    default: T
+    description: string,
+    possible_values?: T[]
+}
+
+type Type = "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "function";
+
+type PrefMap<T extends { [key: string]: { default: unknown } }> = { [Key in keyof T]: T[Key]["default"] }
+export function register_prefs<T extends Record<string, PrefDecl<unknown>>>(ds: T): PrefMap<T> {
+    const p: PrefMap<T> = {} as PrefMap<T>
+    for (const key in ds) {
+        const d = ds[key];
+        let value = get_param(d.default, d.name) ?? d.default;
+        if (d.possible_values) if (!d.possible_values.includes(value)) value = d.default
+        p[key] = value
+    }
+    return p
+}
+
+const raw_params = load_query_params();
+export function load_query_params(): { [key: string]: string } {
+    const q: { [key: string]: string } = {}
+    for (const kv of window.location.hash.substring(1).split("&")) {
+        const [key, value] = kv.split("=")
+        if (key == "prototype") continue
+        q[decodeURIComponent(key)] = decodeURIComponent(value)
+    }
+    return q
+}
+
+export function get_param<T>(example: T, key: string): T | undefined {
+    const v = raw_params[key]
+    if (v == undefined) return undefined
+    const ty = typeof example
+    if (ty == "string") return v as unknown as T
+    else if (ty == "number") {
+        const n = parseInt(v)
+        if (!Number.isNaN(n)) return n as unknown as T
+        console.warn("invalid number parameter");
+    } else if (ty == "boolean") {
+        if (v == "0" || v == "false" || v == "no") return false as unknown as T
+        if (v == "1" || v == "true" || v == "yes") return true as unknown as T
+        console.warn("invalid boolean parameter");
+    } else {
+        throw new Error("invalid param type");
+    }
+    return undefined
+}
+
+
+const PREF_DECLS = {
+    rnnoise: { name: "rnnoise", default: true, description: "Use RNNoise for noise suppression" },
+    native_noise_suppression: { name: "native_noise_suppression", default: false, description: "Suggest the browser to do noise suppression" },
+    username: { name: "username", default: "guest", description: "Username" },
+    microphone_gain: { name: "microphone_gain", default: 1, description: "Amplify microphone volume" },
+    microphone_enabled: { name: "microphone_enabled", default: false, description: "Add one microphone track on startup" },
+    camera_enabled: { name: "camera_enabled", default: false, description: "Add one camera track on startup" },
+    screencast_enabled: { name: "screencast_enabled", default: false, description: "Add one screencast track on startup" },
+}
+export const PREFS = register_prefs(PREF_DECLS)