initial commit

common/state.mjs

@@ -0,0 +1,70 @@
+export const STATE_RESET = 'state-reset'
+export const STREAM_STATUS = 'stream-status'
+export const LOG_MESSAGE = 'log-message'
+export const PING = 'ping'
+export const METER = 'meter'
+export const CONNECTION_STATE = 'connection-state'
+export const CONNECTIVITY = 'connectivity'
+
+export function action (action, data = {}) {
+  return { action, data }
+}
+
+export const INITIAL_STATE = {
+  connected: false,
+  streams: {},
+  log: {},
+  pings: 0,
+  meter: {},
+  connectionState: { connected: false, error: null },
+  connectivity: { internet: false }
+}
+
+export function reducer (state, event) {
+  const { action, data } = event
+  if (action === STATE_RESET) {
+    return { ...INITIAL_STATE, ...data }
+  }
+  if (action === PING) {
+    return {
+      ...state,
+      ping: Date.now()
+    }
+  }
+  if (action === STREAM_STATUS) {
+    const { id, status } = data
+    return {
+      ...state,
+      streams: {
+        ...(state.streams || {}),
+        [id]: {
+          ...state.streams[id],
+          status
+        }
+      }
+    }
+  }
+  if (action === LOG_MESSAGE) {
+    const { id, type, message } = data
+    return {
+      ...state,
+      log: {
+        ...state.log,
+        [id]: [
+          ...(state.log[id] || []),
+          { type, message }
+        ]
+      }
+    }
+  }
+  if (action === METER) {
+    return { ...state, meter: data }
+  }
+  if (action === CONNECTION_STATE) {
+    return { ...state, connectionState: data }
+  }
+  if (action === CONNECTIVITY) {
+    return { ...state, connectivity: data }
+  }
+  return state
+}