Posthog widget embedding (#767)

* load analytics id from url in embedded mode

Signed-off-by: Timo K <timok@element.io>

* add start call in the widget code path

Signed-off-by: Timo K <timok@element.io>

* send group call id instead of call name

Signed-off-by: Timo K <timok@element.io>

* generate analyticsid based on account analyticsid
This make it impossible to find users from the element web posthog instance
in the element call instance

* move registration type setup PosthogAnalytics.ts

* Order identificaition and tracking.
This fixes an issue that the widget version did not identify the user before sneding
the first track event.
Because start call is called right after app startup.

Signed-off-by: Timo K <timok@element.io>

src/settings/useSetting.ts

@@ -20,12 +20,15 @@ import { useMemo, useState, useEffect, useCallback } from "react";
 // Bus to notify other useSetting consumers when a setting is changed
 export const settingsBus = new EventEmitter();
 
+const getSettingKey = (name: string): string => {
+  return `matrix-setting-${name}`;
+};
 // Like useState, but reads from and persists the value to localStorage
 const useSetting = <T>(
   name: string,
   defaultValue: T
 ): [T, (value: T) => void] => {
-  const key = useMemo(() => `matrix-setting-${name}`, [name]);
+  const key = useMemo(() => getSettingKey(name), [name]);
 
   const [value, setValue] = useState<T>(() => {
     const item = localStorage.getItem(key);
@@ -51,13 +54,17 @@ const useSetting = <T>(
     ),
   ];
 };
-export const getSetting = <T>(name: string, defaultValue: T): T => {
-  const key = `matrix-setting-${name}`;
 
-  const item = localStorage.getItem(key);
+export const getSetting = <T>(name: string, defaultValue: T): T => {
+  const item = localStorage.getItem(getSettingKey(name));
   return item === null ? defaultValue : JSON.parse(item);
 };
 
+export const setSetting = <T>(name: string, newValue: T) => {
+  localStorage.setItem(getSettingKey(name), JSON.stringify(newValue));
+  settingsBus.emit(name, newValue);
+};
+
 export const useSpatialAudio = () => useSetting("spatial-audio", false);
 export const useShowInspector = () => useSetting("show-inspector", false);
 export const useOptInAnalytics = () => useSetting("opt-in-analytics", false);