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import React from 'react'
import PropTypes from 'prop-types'
import { ApolloProvider, getDataFromTree } from 'react-apollo'
import Head from 'next/head'
import initApollo from './initApollo'
// Gets the display name of a JSX component for dev tools
function getComponentDisplayName (Component) {
return Component.displayName || Component.name || 'Unknown'
}
export default ComposedComponent => {
return class WithData extends React.Component {
static displayName = `WithData(${getComponentDisplayName(ComposedComponent)})`
static propTypes = {
serverState: PropTypes.object.isRequired
}
static async getInitialProps (ctx) {
let serverState = {}
// Evaluate the composed component's getInitialProps()
let composedInitialProps = {}
if (ComposedComponent.getInitialProps) {
composedInitialProps = await ComposedComponent.getInitialProps(ctx)
}
// Run all GraphQL queries in the component tree
// and extract the resulting data
if (!process.browser) {
const apollo = initApollo()
// Provide the `url` prop data in case a GraphQL query uses it
const url = {query: ctx.query, pathname: ctx.pathname}
try {
// Run all GraphQL queries
await getDataFromTree(
<ApolloProvider client={apollo}>
<ComposedComponent url={url} {...composedInitialProps} />
</ApolloProvider>
)
} catch (error) {
// Prevent Apollo Client GraphQL errors from crashing SSR.
// Handle them in components via the data.error prop:
// http://dev.apollodata.com/react/api-queries.html#graphql-query-data-error
}
// getDataFromTree does not call componentWillUnmount
// head side effect therefore need to be cleared manually
Head.rewind()
// Extract query data from the Apollo store
const state = apollo.getInitialState()
serverState = {
apollo: {
// Only include the Apollo data state
data: state.data
}
}
}
return {
serverState,
...composedInitialProps
}
}
constructor (props) {
super(props)
this.apollo = initApollo(this.props.serverState)
}
render () {
return (
<ApolloProvider client={this.apollo}>
<ComposedComponent {...this.props} />
</ApolloProvider>
)
}
}
}
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