Created
May 3, 2020 15:54
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User provider
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| module Provider = { | |
| let make = React.Context.provider(UserContext.context); | |
| let makeProps = (~value, ~children, ()) => { | |
| "value": value, | |
| "children": children, | |
| }; | |
| }; | |
| type state = {user: UserTypes.user}; | |
| let reducer = (_, action) => { | |
| switch (action) { | |
| | UserTypes.UserLoggedIn(userDetails) => { | |
| user: Authenticated(userDetails), | |
| } | |
| | UserTypes.UserLoggedOut => {user: Guest} | |
| }; | |
| }; | |
| let initialState = {user: Guest}; | |
| [@react.component] | |
| let make = (~children) => { | |
| let (state, dispatch) = React.useReducer(reducer, initialState); | |
| let listenAuthEvents = () => { | |
| Amplify.Hub.listen("auth", eventData => { | |
| switch (eventData##payload##event) { | |
| | "signIn" => | |
| let userDetails: UserTypes.userDetails = { | |
| id: eventData##payload##data##attributes##sub, | |
| username: eventData##payload##data##username, | |
| }; | |
| dispatch(UserTypes.UserLoggedIn(userDetails)); | |
| | "signOut" => dispatch(UserTypes.UserLoggedOut) | |
| | other => Js.log("Unhandled auth event: " ++ other) | |
| } | |
| }); | |
| }; | |
| let fetchUserData = () => { | |
| Amplify.Auth.currentAuthenticatedUser() | |
| |> Js.Promise.then_(authData => { | |
| let userDetails: UserTypes.userDetails = { | |
| id: authData##attributes##sub, | |
| username: authData##username, | |
| }; | |
| dispatch(UserTypes.UserLoggedIn(userDetails)); | |
| Js.Promise.resolve(); | |
| }); | |
| }; | |
| React.useEffect0(() => { | |
| listenAuthEvents(); | |
| ignore(fetchUserData()); | |
| Some(() => {Amplify.Hub.remove("auth")}); | |
| }); | |
| <Provider value=(state.user, dispatch)> children </Provider>; | |
| }; |
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