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fetcher-fetch.ts
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fetcher-fetch.ts
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import {
generateInfiniteQueryKey,
generateMutationKey,
generateQueryKey,
generateQueryVariablesSignature,
} from './variables-generator.js';
import { FetcherRenderer } from './fetcher.js';
import { OperationDefinitionNode } from 'graphql';
import { ReactQueryVisitor } from './visitor.js';
export class FetchFetcher implements FetcherRenderer {
constructor(private visitor: ReactQueryVisitor) {}
generateFetcherImplementaion(): string {
return `
function fetcher<TData, TVariables>(endpoint: string, requestInit: RequestInit, query: string, variables?: TVariables) {
return async (): Promise<TData> => {
const res = await fetch(endpoint, {
method: 'POST',
...requestInit,
body: JSON.stringify({ query, variables }),
});
const json = await res.json();
if (json.errors) {
const { message } = json.errors[0];
throw new Error(message);
}
return json.data;
}
}`;
}
generateInfiniteQueryHook(
node: OperationDefinitionNode,
documentVariableName: string,
operationName: string,
operationResultType: string,
operationVariablesTypes: string,
hasRequiredVariables: boolean
): string {
const variables = generateQueryVariablesSignature(hasRequiredVariables, operationVariablesTypes);
const hookConfig = this.visitor.queryMethodMap;
this.visitor.reactQueryHookIdentifiersInUse.add(hookConfig.infiniteQuery.hook);
this.visitor.reactQueryOptionsIdentifiersInUse.add(hookConfig.infiniteQuery.options);
const options = `options?: ${hookConfig.infiniteQuery.options}<${operationResultType}, TError, TData>`;
return `export const useInfinite${operationName} = <
TData = ${operationResultType},
TError = ${this.visitor.config.errorType}
>(
dataSource: { endpoint: string, fetchParams?: RequestInit },
pageParamKey: keyof ${operationVariablesTypes},
${variables},
${options}
) =>
${hookConfig.infiniteQuery.hook}<${operationResultType}, TError, TData>(
${generateInfiniteQueryKey(node, hasRequiredVariables)},
(metaData) => fetcher<${operationResultType}, ${operationVariablesTypes}>(dataSource.endpoint, dataSource.fetchParams || {}, ${documentVariableName}, {...variables, ...(metaData.pageParam ? {[pageParamKey]: metaData.pageParam} : {})})(),
options
);`;
}
generateQueryHook(
node: OperationDefinitionNode,
documentVariableName: string,
operationName: string,
operationResultType: string,
operationVariablesTypes: string,
hasRequiredVariables: boolean
): string {
const variables = generateQueryVariablesSignature(hasRequiredVariables, operationVariablesTypes);
const hookConfig = this.visitor.queryMethodMap;
this.visitor.reactQueryHookIdentifiersInUse.add(hookConfig.query.hook);
this.visitor.reactQueryOptionsIdentifiersInUse.add(hookConfig.query.options);
const options = `options?: ${hookConfig.query.options}<${operationResultType}, TError, TData>`;
return `export const use${operationName} = <
TData = ${operationResultType},
TError = ${this.visitor.config.errorType}
>(
dataSource: { endpoint: string, fetchParams?: RequestInit },
${variables},
${options}
) =>
${hookConfig.query.hook}<${operationResultType}, TError, TData>(
${generateQueryKey(node, hasRequiredVariables)},
fetcher<${operationResultType}, ${operationVariablesTypes}>(dataSource.endpoint, dataSource.fetchParams || {}, ${documentVariableName}, variables),
options
);`;
}
generateMutationHook(
node: OperationDefinitionNode,
documentVariableName: string,
operationName: string,
operationResultType: string,
operationVariablesTypes: string,
hasRequiredVariables: boolean
): string {
const variables = `variables?: ${operationVariablesTypes}`;
const hookConfig = this.visitor.queryMethodMap;
this.visitor.reactQueryHookIdentifiersInUse.add(hookConfig.mutation.hook);
this.visitor.reactQueryOptionsIdentifiersInUse.add(hookConfig.mutation.options);
const options = `options?: ${hookConfig.mutation.options}<${operationResultType}, TError, ${operationVariablesTypes}, TContext>`;
return `export const use${operationName} = <
TError = ${this.visitor.config.errorType},
TContext = unknown
>(
dataSource: { endpoint: string, fetchParams?: RequestInit },
${options}
) =>
${hookConfig.mutation.hook}<${operationResultType}, TError, ${operationVariablesTypes}, TContext>(
${generateMutationKey(node)},
(${variables}) => fetcher<${operationResultType}, ${operationVariablesTypes}>(dataSource.endpoint, dataSource.fetchParams || {}, ${documentVariableName}, variables)(),
options
);`;
}
generateFetcherFetch(
node: OperationDefinitionNode,
documentVariableName: string,
operationName: string,
operationResultType: string,
operationVariablesTypes: string,
hasRequiredVariables: boolean
): string {
const variables = generateQueryVariablesSignature(hasRequiredVariables, operationVariablesTypes);
return `\nuse${operationName}.fetcher = (dataSource: { endpoint: string, fetchParams?: RequestInit }, ${variables}) => fetcher<${operationResultType}, ${operationVariablesTypes}>(dataSource.endpoint, dataSource.fetchParams || {}, ${documentVariableName}, variables);`;
}
}