initial commit

web/sw.js

@@ -0,0 +1,47 @@
+let ws
+let shouldRetry = false
+
+function start(location) {
+    shouldRetry = true
+    const port = self.location.port ? `:${self.location.port}` : ""
+    const socket = new WebSocket(`ws://${self.location.hostname}${port}/ws?location=${location}`)
+    socket.onopen = () => {
+        ws = socket
+    }
+    socket.onclose = () => {
+        reconnect()
+    }
+    socket.onerror = () => {
+        reconnect()
+    }
+    socket.onmessage = (event) => {
+        self.registration.showNotification("7am weather summary", {
+            body: event.data
+        })
+    }
+}
+
+function cancel() {
+    shouldRetry = false
+    if (ws) {
+        ws.close()
+        ws = null
+    }
+}
+
+async function reconnect() {
+    while (shouldRetry) {
+        await new Promise((resolve) => {
+            setTimeout(resolve, 5 * 60 * 1000)
+        })
+        start(location)
+    }
+}
+
+self.addEventListener("message", (event) => {
+    if (event.data === "cancel") {
+        cancel()
+    } else {
+        start(event.data)
+    }
+})