/
Subschema.ts
45 lines (36 loc) · 1.68 KB
/
Subschema.ts
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import { GraphQLSchema } from 'graphql';
import { SubschemaConfig, Transform, MergedTypeConfig, CreateProxyingResolverFn, Subscriber, Executor } from './types';
import { FIELD_SUBSCHEMA_MAP_SYMBOL, OBJECT_SUBSCHEMA_SYMBOL } from './symbols';
import { applySchemaTransforms } from './applySchemaTransforms';
export function getSubschema(result: any, responseKey: string): GraphQLSchema | SubschemaConfig {
const subschema = result[FIELD_SUBSCHEMA_MAP_SYMBOL] && result[FIELD_SUBSCHEMA_MAP_SYMBOL][responseKey];
return subschema || result[OBJECT_SUBSCHEMA_SYMBOL];
}
export function setObjectSubschema(result: any, subschema: GraphQLSchema | SubschemaConfig) {
result[OBJECT_SUBSCHEMA_SYMBOL] = subschema;
}
export function isSubschemaConfig(value: any): value is SubschemaConfig | Subschema {
return Boolean((value as SubschemaConfig).schema);
}
export function isSubschema(value: any): value is Subschema {
return Boolean((value as Subschema).transformedSchema);
}
export class Subschema {
public schema: GraphQLSchema;
public rootValue?: Record<string, any>;
public executor?: Executor;
public subscriber?: Subscriber;
public createProxyingResolver?: CreateProxyingResolverFn;
public transforms: Array<Transform>;
public transformedSchema: GraphQLSchema;
public merge?: Record<string, MergedTypeConfig>;
constructor(config: SubschemaConfig) {
this.schema = config.schema;
this.executor = config.executor;
this.subscriber = config.subscriber;
this.createProxyingResolver = config.createProxyingResolver;
this.transforms = config.transforms ?? [];
this.merge = config.merge;
this.transformedSchema = applySchemaTransforms(this.schema, this.transforms);
}
}