new (useless) sw

1 files changed, 56 insertions, 0 deletions

diff --git a/client-web/source/sw/client.ts b/client-web/source/sw/client.ts
new file mode 100644
index 0000000..1396826
--- /dev/null
+++ b/client-web/source/sw/client.ts
@@ -0,0 +1,56 @@
+/*
+    This file is part of keks-meet (https://codeberg.org/metamuffin/keks-meet)
+    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
+    Copyright (C) 2022 metamuffin <metamuffin@disroot.org>
+*/
+/// <reference lib="dom" />
+
+import { log } from "../logger.ts"
+import { SWMessage } from "./protocol.ts"
+
+export let SW_ENABLED = false
+
+export async function init_serviceworker() {
+    let reg = await globalThis.navigator.serviceWorker.getRegistration()
+    if (reg) {
+        log("sw", "service worker already installed")
+        SW_ENABLED = true
+    } else {
+        log("sw", "registering service worker")
+        await globalThis.navigator.serviceWorker.register("/sw.js", { scope: "/", type: "module" })
+        log("sw", "worker installed")
+        reg = await globalThis.navigator.serviceWorker.getRegistration();
+        if (!reg) throw new Error("we just registered the sw!?");
+        SW_ENABLED = !!reg
+    }
+    start_handler()
+    log("sw", "checking for updates")
+    send_sw_message({ check_version: true })
+}
+
+export async function send_sw_message(message: SWMessage, transfer?: Transferable[]) {
+    const reg = await globalThis.navigator.serviceWorker.getRegistration();
+    if (!reg) throw new Error("no sw");
+    if (!reg.active) throw new Error("no sw");
+    if (transfer) reg.active.postMessage(message, transfer)
+    else reg.active.postMessage(message, transfer)
+}
+
+export async function update_serviceworker() {
+    const regs = await globalThis.navigator.serviceWorker.getRegistrations()
+    for (const r of regs) await r.unregister()
+    log("sw", "cleared all workers")
+    setTimeout(() => window.location.reload(), 500)
+}
+
+function start_handler() {
+    globalThis.navigator.serviceWorker.addEventListener("message", event => {
+        const message: SWMessage = event.data;
+        if (message.version_info) {
+            log("sw", JSON.stringify(message.version_info))
+        }
+        if (message.updated) {
+            log("*", "updated")
+        }
+    })
+}