| 1 | {"version":3,"file":"bundle.umd.js","sources":["../src/utils.ts","../src/index.ts"],"sourcesContent":["// importing print is a reasonable thing to do, since Apollo Link Http requires\n// it to be present\nimport { DocumentNode, DirectiveNode, print } from 'graphql';\n\nimport { checkDocument, removeDirectivesFromDocument } from 'apollo-utilities';\n\nconst connectionRemoveConfig = {\n test: (directive: DirectiveNode) => directive.name.value === 'client',\n remove: true,\n};\n\nconst removed = new Map();\nexport function removeClientSetsFromDocument(\n query: DocumentNode,\n): DocumentNode {\n // caching\n const cached = removed.get(query);\n if (cached) return cached;\n\n checkDocument(query);\n\n const docClone = removeDirectivesFromDocument(\n [connectionRemoveConfig],\n query,\n );\n\n // caching\n removed.set(query, docClone);\n return docClone;\n}\n\nexport function normalizeTypeDefs(\n typeDefs: string | string[] | DocumentNode | DocumentNode[],\n) {\n const defs = Array.isArray(typeDefs) ? typeDefs : [typeDefs];\n\n return defs\n .map(typeDef => (typeof typeDef === 'string' ? typeDef : print(typeDef)))\n .map(str => str.trim())\n .join('\\n');\n}\n","import {\n ApolloLink,\n Observable,\n Operation,\n NextLink,\n FetchResult,\n} from 'apollo-link';\nimport { ApolloCache } from 'apollo-cache';\nimport { DocumentNode } from 'graphql';\n\nimport { hasDirectives, getMainDefinition } from 'apollo-utilities';\n\nimport * as Async from 'graphql-anywhere/lib/async';\nconst { graphql } = Async;\n\nimport { FragmentMatcher } from 'graphql-anywhere';\n\nimport { removeClientSetsFromDocument, normalizeTypeDefs } from './utils';\n\nconst capitalizeFirstLetter = str => str.charAt(0).toUpperCase() + str.slice(1);\n\nexport type ClientStateConfig = {\n cache?: ApolloCache<any>;\n resolvers: any | (() => any);\n defaults?: any;\n typeDefs?: string | string[] | DocumentNode | DocumentNode[];\n fragmentMatcher?: FragmentMatcher;\n};\n\nexport const withClientState = (\n clientStateConfig: ClientStateConfig = { resolvers: {}, defaults: {} },\n) => {\n const { defaults, cache, typeDefs, fragmentMatcher } = clientStateConfig;\n if (cache && defaults) {\n cache.writeData({ data: defaults });\n }\n\n return new class StateLink extends ApolloLink {\n public writeDefaults() {\n if (cache && defaults) {\n cache.writeData({ data: defaults });\n }\n }\n\n public request(\n operation: Operation,\n forward: NextLink = () => Observable.of({ data: {} }),\n ): Observable<FetchResult> {\n if (typeDefs) {\n const directives = 'directive @client on FIELD';\n\n const definition = normalizeTypeDefs(typeDefs);\n\n operation.setContext(({ schemas = [] }) => ({\n schemas: schemas.concat([{ definition, directives }]),\n }));\n }\n\n const isClient = hasDirectives(['client'], operation.query);\n\n if (!isClient) return forward(operation);\n\n const resolvers =\n typeof clientStateConfig.resolvers === 'function'\n ? clientStateConfig.resolvers()\n : clientStateConfig.resolvers;\n const server = removeClientSetsFromDocument(operation.query);\n const { query } = operation;\n const type =\n capitalizeFirstLetter(\n (getMainDefinition(query) || ({} as any)).operation,\n ) || 'Query';\n\n const resolver = (fieldName, rootValue = {}, args, context, info) => {\n const { resultKey } = info;\n\n // rootValue[fieldName] is where the data is stored in the \"canonical model\"\n // rootValue[info.resultKey] is where the user wants the data to be.\n // If fieldName != info.resultKey -- then GraphQL Aliases are in play\n // See also:\n // - https://github.com/apollographql/apollo-client/tree/master/packages/graphql-anywhere#resolver-info\n // - https://github.com/apollographql/apollo-link-rest/pull/113\n\n // Support GraphQL Aliases!\n const aliasedNode = rootValue[resultKey];\n const preAliasingNode = rootValue[fieldName];\n const aliasNeeded = resultKey !== fieldName;\n\n // If aliasedValue is defined, some other link or server already returned a value\n if (aliasedNode !== undefined || preAliasingNode !== undefined) {\n return aliasedNode || preAliasingNode;\n }\n\n // Look for the field in the custom resolver map\n const resolverMap = resolvers[(rootValue as any).__typename || type];\n if (resolverMap) {\n const resolve = resolverMap[fieldName];\n if (resolve) return resolve(rootValue, args, context, info);\n }\n\n // TODO: the proper thing to do here is throw an error saying to\n // add `client.onResetStore(link.writeDefaults);`\n // waiting on https://github.com/apollographql/apollo-client/pull/3010\n\n return (\n // Support nested fields\n (aliasNeeded ? aliasedNode : preAliasingNode) ||\n (defaults || {})[fieldName]\n );\n };\n\n if (server) operation.query = server;\n const obs =\n server && forward\n ? forward(operation)\n : Observable.of({\n data: {},\n });\n\n return new Observable(observer => {\n // Works around race condition between completion and graphql execution\n // finishing. If complete is called during the graphql call, we will\n // miss out on the result, since the observer will have completed\n let complete = false;\n let handlingNext = false;\n obs.subscribe({\n next: ({ data, errors }) => {\n const observerErrorHandler = observer.error.bind(observer);\n const context = operation.getContext();\n\n handlingNext = true;\n //data is from the server and provides the root value to this GraphQL resolution\n //when there is no resolver, the data is taken from the context\n graphql(resolver, query, data, context, operation.variables, {\n fragmentMatcher,\n })\n .then(nextData => {\n observer.next({\n data: nextData,\n errors,\n });\n if (complete) {\n observer.complete();\n }\n handlingNext = false;\n })\n .catch(observerErrorHandler);\n },\n error: observer.error.bind(observer),\n complete: () => {\n if (!handlingNext) {\n observer.complete();\n }\n complete = true;\n },\n });\n });\n }\n 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