redux-simple-router - perform action based on URL - javascript

I'm using Redux with redux-simple-router.
Here's what I'm trying to do. A user hits a URL like so:
http://localhost:3000/#/profile/kSzHKGX
Where kSzHKGX is the ID of the profile. This should route to Profile container filled out with the details of the profile with id kSzHKGX.
My routes look like this:
export default (
<Route path="/" component={App}>
...
<Route path="profile" component={Profile} />
...
</Route>
)
So hitting the above link would give me Warning: [react-router] Location "undefined" did not match any routes
My container looks like this:
#connect(
state => state.profile,
dispatch => bindActionCreators(actionCreators, dispatch)
)
export class Profile extends Component {
constructor(props) {
super(props)
}
componentDidMount() {
const { getProfileIfNeeded, dispatch } = this.props
getProfileIfNeeded()
}
render() {
return (
<section>
...
</section>
)
}
}
So normally my container would just be populated from the state as usual in Redux.
Basically I need to have a way of doing some wildcard in the route. Than I need to pass the URL to the action that would pull up the right profile from an API. The question is, is it doable with react-simple-router? Can I do that somehow using UPDATE_PATH? Would it be the proper Redux way? Or should I use something else?

Following Josh David Miller's advice, I made my route look like so:
<Route path="admin/profile/:id" component={Profile} />
Than my container got this method to get the profile from API:
componentWillMount() {
const { getProfile, dispatch } = this.props
getProfile(this.props.params.id)
}
And this to cleanup (without it I would have the previous profile display for split second on component load - before I hit API in componentWillMount)
componentWillUnmount() {
this.props.unmountProfile()
}
Update:
As an alternative to the cleanup, I'm considering using the Container Component Pattern. Basically have the outer component do the data fetching and passing the data to the inner component as a prop.

Related

how to detect previous url path react

I am using React, and I am trying to detect the previous path / url that the user is coming from within my app. so if they are coming from /register and land on /index, then how do I log, on /index, that the user came from /register. Is this possible?
you can save previous path in a componentWillReceiveProps lifecycle method.
<Route component={App}>
{/* ... other routes */}
</Route>
const App = React.createClass({
getInitialState() {
return { prevPath: '' }
},
componentWillReceiveProps(nextProps) {
if (nextProps.location !== this.props.location) {
this.setState({ prevPath: this.props.location })
}
}
})

React Routing to Same Component with Different URL

In my main class I have a nav bar with the options below:
<NavDropdown title="Search" id="collasible-nav-dropdown">
<NavDropdown.Item href="#/searchpage/p" onClick={this.dontEdit}>Find People</NavDropdown.Item>
<NavDropdown.Item href="#/searchpage/s" onClick={this.searchSchool}>Find Schools</NavDropdown.Item>
<NavDropdown.Item href="#/searchpage/w" onClick={this.dontEdit}>Find Work Places</NavDropdown.Item>
</NavDropdown>
These have a route which routes to the same component which then reads the parameter at the end of the URL and runs a different search depending on the value. For example 's' is search schools and 'p' is search people. If I navigate between the different search functions from the nav bar then it doesn't refresh to the new search. For example if I go from 'Find Schools' to 'Find Work' it stays on schools, but if I were to go direct to 'Find Work Places' then it goes there direct. Also if I navigate to the home page and back to another search then it works.
The route looks like:
<Route path="/searchpage/:type" render={props => (<SearchPage {...props} findPerson={this.findPerson} routeReset={this.routeReset} getPersonsByName={this.getPersonsByName} />)}/>
Is anyone able to advise how to get this to route as I want it to? The search component is like:
import Row from 'react-bootstrap/Row';
import Col from 'react-bootstrap/Col';
import Container from 'react-bootstrap/Container';
import Button from 'react-bootstrap/Button';
import Flash from './components/flash';
import Search from "./components/search";
const searchtypes = {"p":"People","w":"Work Places","s":"Schools"};
class SearchPage extends Component {
constructor(props) {
super(props);
this.state = {
type:this.props.match.params.type
}
}
componentDidMount(){
}
render() {
return (
<Container>
<Row>
<Col>
<h4>Search {searchtypes[this.state.type]}</h4>
<br/>
</Col>
</Row>
<Row><Col><Search {...this.props} type={this.state.type}/></Col></Row>
</Container>
);
}
}
export default SearchPage;
The Route's render prop doesn't remount when the matched route doesn't change, i.e. even when the route matches but the route param is different it won't re-render. Instead use the component prop.
react-router-dom component
When you use component (instead of render or children, below) the
router uses React.createElement to create a new React element from the
given component. That means if you provide an inline function to the
component prop, you would create a new component every render. This
results in the existing component unmounting and the new component
mounting instead of just updating the existing component. When using
an inline function for inline rendering, use the render or the
children prop (below).
<Route
path="/searchpage/:type"
component={props => (
<SearchPage
{...props}
findPerson={this.findPerson}
routeReset={this.routeReset}
getPersonsByName={this.getPersonsByName}
/>
)}
/>
An alternative to this is to implement the componentDidUpdate lifecycle function in SearchPage to detect when the route param prop updates and update the type stored in state. This way the component won't continually unmount/mount each time.
componentDidUpdate(prevProps) {
if (prevProps.match.params.type !== this.props.match.params.type) {
setState({
type: this.props.match.params.type,
});
}
}
Try this:
class SearchPage extends Component {
render() {
return (
<Container>
<Row>
<Col>
<h4>Search {searchtypes[this.props.match.params.type]}</h4>
<br/>
</Col>
</Row>
<Row><Col><Search {...this.props} type={this.props.match.params.type}/></Col></Row>
</Container>
);
}
}
The type data comes from props and therefore you should not persist it on the component state.
Note: Make sure you use react-router Link component it seems you use native a tags

Passing callback to children, to update a different child

I am trying to create a Navbar (component), which changes slightly when a user logs in in a SignIn component. So, my app looks like this:
I have a state in App, with authenticated set to false as default. I then have a function, updatedAuthenticationEvent, which sets the value of the app state.
Ihave a NavBar component, which I pass in the value of Authenticated. The idea is that I change something on the navbar, if authenticated. That would be, dont show "Signin" and rather show "Sign Out". So when I sign in on my sign in component, the navbar changes.
I then have a few routes in my app, one of which is my Signin, which I attempt to pass my function to, as a callback.
export default class App extends React.Component {
constructor(props)
{
super(props);
this.state = {
authenticated: false
}
}
updatedAuthenticationEvent(isAthenticated)
{
console.log('Called!');
this.setState({authenticated: isAthenticated});
}
render() {
return (
<div>
<Router>
<div>
<Navbar authenticated={this.state.authenticated} />
<Route exact path='/' component={Home} />
<Route path="/login" component={Login} changeState={this.updatedAuthenticationEvent} />
</div>
</Router>
<Footer />
</div>
)
}
}
My SignIn component, actually wraps my sign in content.
But for now, I'm just trying to make something work.
So for now, all I am doing is that when the sign in component loads, set the Authenticated to true.
My goal though is to pass that prop to my LoginBox, which has all the logic, and my actual sign in method. But for now, I want this to work.
export default class SignIn extends Component {
constructor(props)
{
super(props);
}
componentWillMount()
{
this.props.changeState(true);
}
render() {
return (
<div className="row justify-content-md-center">
<div className="col-lg-4">
<LoginBox changeState={this.props.changeState} />
</div>
</div>
)
}
}
I get the error:
TypeError: this.props.changeState is not a function
What do I need to change to achieve this? Signin box event, should effect the Navbar.
well, I will not recommend this, but here it is,
use the render prop from Router, so you can pass the callback for changeState directly
<Route path="/login" render={(props) => <Login {...props} changeState={this.updatedAuthenticationEvent} />
then I would recommend change componentWillMount for componentDidMount in your Login Component
and finally
Use an arrow function for your updatedAuthenticationEvent callback like
updatedAuthenticationEvent = (isAthenticated) => {
....
}
So you do not have context problems when executing changeState
working demo

React Router v4: Sending requests when navigation changes

I'm coding an authentication with react-router v4 and I'm using the PrivateRoute with render props, like the documentation: Redirects (Auth)
What I'm trying to do is: Whenever the user navigates to a route, I want to dispatch an action to make a request to the backend to verify if he's logged in.
Like this:
// App.js
class App extends Component {
checkAuth = () => {
const { dispatch, } = this.props;
// callback to dispatch
}
render() {
const props = this.props;
return (
<Router>
<div className="App">
<Switch>
<Route exact path="/" component={Login} />
<PrivateRoute
exact
path="/dashboard"
component={Dashboard}
checkIsLoggedIn={this.checkAuth}
/>
{/* ... other private routes here */}
</Switch>
</div>
</Router>
);
}
In PrivateRoute.js I'm listening the route to check if it changes, but when a route changes, this function is called too many times, and that's a problem to dispatch an action to make a request.
// PrivateRoute.js
const PrivateRoute = ({ component: Component, auth, checkIsLoggedIn, ...rest }) => (
<Route
{...rest}
render={props => {
props.history.listen((location, action) => {
if (checkIsLoggedIn) {
// Here I check if the route changed, but it render too many times to make a request
checkIsLoggedIn(); // here is the callback props
}
});
if (auth.login.isLoggedIn) {
return <Component {...props} />;
} else {
return <Redirect to={{ pathname: "/login", state: { from: props.location } }} />
}
}
}
/>
);
I need a help to figure it out a good way to call the backend whenever the route changes.
Creating a Higher Order Component (HOC) is a very clean way to do this. This way, you won't need to create a separate PrivateRoute component, and it would take only one line of change to convert any Component from public to protected, or vice versa.
Something like this should work:
import React from 'react';
import { Redirect } from "react-router-dom";
export function withAuth(WrappedComponent) {
return class extends React.Component {
constructor(props) {
super(props);
this.state = {
isUserLoggedIn: false,
isLoading: true
};
}
componentDidMount() {
// Check for authentication when the component is mounted
this.checkAuthentication();
}
checkAuthentication() {
// Put some logic here to check authentication
// You can make a server call if you wish,
// but it will be faster if you read the logged-in state
// from cookies or something.
// Making a server call before every protected component,
// will be very expensive, and will be a poor user experience.
this.setState({
isUserLoggedIn: true, // Set to true or false depending upon the result of your auth check logic
isLoading: false
});
}
render() {
// Optionally, you can add logic here to show a common loading animation,
// or anything really, while the component checks for auth status.
// You can also return null, if you don't want any special handling here.
if (this.state.isLoading) return (<LoadingAnimation />);
// This part will load your component if user is logged in,
// else it will redirect to the login route
if (this.state.isUserLoggedIn) {
return <WrappedComponent authData={this.state} {...this.props} />;
} else {
return <Redirect to={{ pathname: "/login", state: { from: props.location } }} />;
}
}
}
}
Once you have that component in place, all you need to do is use the HOC in any component that you wish to have protected. For example, in your case, the export line in your Dashboard file would be something like this:
/* Dashboard.js */
class Dashboard extends React.Component { ... }
export default withAuth(Dashboard);
and in your App, you can use a simple Route component:
<Route exact path='/dashboard' component={Dashboard} />
Your App does not need to care about which routes are protected, and which ones aren't. In fact, only the actual components need to know that they are protected.
Hope this helps. Cheers! :)

Show progress bar BEFORE go to route

I'm developing a universal react application using redux. I use react-router v3.
I want to show a progress bar "BEFORE" going to next route (next route is fetching data from API).
for example imagine I am in "Home Page" and I want go to "Submit Page". when I click on the Submit Link (react-router Link) first show a progress bar in "Home Page" and wait for Submit page data fetching and then go to "Submit Page".
My React Routes:
<Route component={App}>
<Route path={HomingRoutes.HomePage} component={HomePage}/>
<Route path={HomingRoutes.SubmitPage} component={SubmitPage}/>
<Route path={HomingRoutes.SearchPage} component={SearchPage}/>
<Route path={`${HomingRoutes.DealsPage}`} component={DealsPage}/>
<Route path={`${HomingRoutes.DealPage}/:id(/:title)`} component={DealPage}/>
<Route path={`${HomingRoutes.Detail}/:id(/:title)`} component={DetailPage}/>
<Route path="*" component={NoMatch}/>
</Route>
in Home Page :
<Link to "/Submit" >Submit</Link>
My Submit page Container code is :
class SubmitContainer extends React.Component {
static readyOnActions(dispatch) {
return Promise.all([
dispatch(SubmitActions.fetchSubmitInitialData()),
]);
}
componentDidMount() {
this.props.fetchSubmitInitialData();
}
}
"fetchSubmitInitialData" is an action creator that fetch data from API.
One solution would be to pass a placeholder component as props to your SubmitPage that will render only when data is fetching.
So you can use something like:
class SubmitContainer extends React.Component {
state = {
loading: true
progress: 0,
}
componentDidMount() {
// fetch some data and update the state
// consider updating the progress more often
this.props.fetchSubmitInitialData()
.then(() => {
this.setState({ loading: false, progress: 100 })
})
}
render() {
const Placeholder = this.props.placeholder
// Show the placeholder when loading
if (this.state.loading) {
return <Placeholder loading progress={this.state.progress} />
}
// Otherwise render your component with the data
return <SubmitPage data={/*..*/}>
}
}
And finally pass you could use the component HomePage as placeholder like this:
<Route path={HomingRoutes.HomePage} component={HomePage}/>
<Route path={HomingRoutes.SubmitPage} render={(props) => (
<SubmitContainer {...props} placeholder={HomePage} />
)}/>
Here I use the render props with React router v4. But I'm sure there is an equivalent for the version 3
Now HomePage will render during data fetching and can use the props loading and progress to show a spinner or something
You can add onEnter hook into your router and add onEnter.js inside your SubmitContainer folder and move fetchSubmitInitialData to the onEnter.js then import your store here and dispatch it. the implementation might looks like this:
Your React-Route
import { onEnterSubmitPage } from './your onEnter path/onEnter'
<Route component={App}>
<Route path={HomingRoutes.HomePage} component={HomePage}/>
<Route path={HomingRoutes.SubmitPage} component={SubmitPage} onEnter={onEnterSubmitPage}/>
<Route path={HomingRoutes.SearchPage} component={SearchPage}/>
<Route path={`${HomingRoutes.DealsPage}`} component={DealsPage}/>
<Route path={`${HomingRoutes.DealPage}/:id(/:title)`} component={DealPage}/>
<Route path={`${HomingRoutes.Detail}/:id(/:title)`} component={DetailPage}/>
<Route path="*" component={NoMatch}/>
</Route>
create onEnter.js file in SubmitPage container:
/**
* Import dependencies and action creators
*/
import { store } from '../../index'
import { fetchSubmitInitialData } from './actions'
/**
* Define onEnter function
*/
export function onEnterSubmitPage() {
store.dispatch(fetchSubmitInitialData())
}
then we can integrate state for progress bar into redux too.
actions.js
/** Import all dependencies here **/
import axios from 'axios'
import { FETCH_SUBMIT_INITIAL_DATA, IS_FETCHING_INITIAL_DATA } from './constants'
export function fetchSubmitInitialData() {
/** this dispatch is from middleware **/
return (dispatch) => {
/** this will set progress bar to true **/
dispatch(fetchSubmitInitialData(true))
/** Your fetching action here, this will depend on your configuration **/
axios.get(`url`, {{ headers: `bearer //your token`}})
.then( (response) => {
dispatch(fetchSubmitInitialData(false))
})
}
}
export function isFetchInitialData(status) {
return {
type: IS_FETCHING_INITIAL_DATA,
status
}
}
so there is no need to fetch the data inside SubmitPage container.
One solution would be to pass a placeholder component as props to your SubmitPage that will render only when data is fetching.
So you can use something like:
class SubmitContainer extends React.Component {
render() {
/** this come from your reducer **/
const { isFetching, submitInitialData } = this.props
// Show the placeholder when loading
if (isFetching) {
return <Loader />
}
// Otherwise render your component
return <SubmitPage data={/*..*/}>
}
}
// Map state to props
const mapStatetoProps = ({ app }) => {
isFetching: //,
submitInitialData: //
}
export default connect(mapStatetoProps, null)(SubmitContainer)

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