113 lines
3.3 KiB
JavaScript
113 lines
3.3 KiB
JavaScript
import { ApolloClient, InMemoryCache, from, HttpLink } from '@apollo/client'
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import { decodeCursor, LIMIT } from './cursor'
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import { RetryLink } from '@apollo/client/link/retry'
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const additiveLink = from([
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new RetryLink(),
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new HttpLink({ uri: '/api/graphql' })
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])
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function isFirstPage (cursor, existingThings) {
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if (cursor) {
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const decursor = decodeCursor(cursor)
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return decursor.offset === LIMIT
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} else {
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// we don't have anything cached, or our existing items are less than
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// or equal to a full page
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return existingThings?.length < LIMIT
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}
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}
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export default function getApolloClient () {
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global.apolloClient ||= new ApolloClient({
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link: additiveLink,
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cache: new InMemoryCache({
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typePolicies: {
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Query: {
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fields: {
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topUsers: {
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keyArgs: ['within'],
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merge (existing, incoming) {
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if (isFirstPage(incoming.cursor, existing?.users)) {
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return incoming
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}
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return {
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cursor: incoming.cursor,
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users: [...(existing?.users || []), ...incoming.users]
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}
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}
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},
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moreItems: {
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keyArgs: ['sort', 'name', 'within'],
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merge (existing, incoming) {
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if (isFirstPage(incoming.cursor, existing?.items)) {
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return incoming
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}
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return {
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cursor: incoming.cursor,
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items: [...(existing?.items || []), ...incoming.items]
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}
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}
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},
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moreFlatComments: {
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keyArgs: ['name', 'sort', 'within'],
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merge (existing, incoming) {
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if (isFirstPage(incoming.cursor, existing?.comments)) {
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return incoming
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}
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return {
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cursor: incoming.cursor,
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comments: [...(existing?.comments || []), ...incoming.comments]
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}
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}
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},
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notifications: {
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keyArgs: false,
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merge (existing, incoming) {
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if (isFirstPage(incoming.cursor, existing?.notifications)) {
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return incoming
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}
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return {
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cursor: incoming.cursor,
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notifications: [...(existing?.notifications || []), ...incoming.notifications],
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lastChecked: incoming.lastChecked
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}
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}
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},
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walletHistory: {
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keyArgs: ['inc'],
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merge (existing, incoming) {
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if (isFirstPage(incoming.cursor, existing?.facts)) {
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return incoming
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}
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return {
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cursor: incoming.cursor,
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facts: [...(existing?.facts || []), ...incoming.facts]
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}
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}
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}
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}
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}
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}
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}),
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defaultOptions: {
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// cache-and-network allows us to refresh pages on navigation
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watchQuery: {
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fetchPolicy: 'cache-only',
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nextFetchPolicy: 'cache-first'
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},
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query: {
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fetchPolicy: 'cache-only',
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nextFetchPolicy: 'cache-first'
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}
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}
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})
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return global.apolloClient
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}
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