51 lines
1.3 KiB
TypeScript
51 lines
1.3 KiB
TypeScript
import { InMemoryCache } from '@apollo/client';
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interface IRef {
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__ref: string;
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}
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const cache = new InMemoryCache({
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typePolicies: {
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App: {
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keyFields: ['key']
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},
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Mutation: {
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mutationType: true,
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fields: {
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verifyConnection: {
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merge(existing, verifiedConnection, { readField, cache }) {
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const appKey = readField('key', verifiedConnection);
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const appCacheId = cache.identify({
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__typename: 'App',
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key: appKey,
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});
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cache.modify({
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id: appCacheId,
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fields: {
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connections: (existingConnections) => {
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const existingConnectionIndex = existingConnections.findIndex((connection: IRef) => {
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return connection.__ref === verifiedConnection.__ref;
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});
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const connectionExists = existingConnectionIndex !== -1;
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// newly created and verified connection
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if (!connectionExists) {
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return [verifiedConnection, ...existingConnections];
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}
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return existingConnections;
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}
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}
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});
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return verifiedConnection;
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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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export default cache;
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