@graphql-mesh/fusion-composition/cjs/transforms/encapsulate.js

Basic composition utility for Fusion spec

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.resolveToDirective = exports.resolveToSourceArgsScalar = void 0;
exports.createEncapsulateTransform = createEncapsulateTransform;
const graphql_1 = require("graphql");
const filter_schema_js_1 = require("./filter-schema.js");
const OPERATION_TYPE_SUFFIX_MAP = {
    query: 'Query',
    mutation: 'Mutation',
    subscription: 'Subscription',
};
const DEFAULT_APPLY_TO = {
    query: true,
    mutation: true,
    subscription: true,
};
function createEncapsulateTransform(opts = {}) {
    return function encapsulateTransform(schema, subgraphConfig) {
        const groupName = opts.name || subgraphConfig.name;
        const applyToMap = {
            ...DEFAULT_APPLY_TO,
            ...(opts.applyTo || {}),
        };
        const newRootTypes = {};
        for (const opTypeString in applyToMap) {
            const operationType = opTypeString;
            const originalType = schema.getRootType(operationType);
            if (originalType && applyToMap[operationType]) {
                const originalTypeConfig = originalType.toConfig();
                const wrappedTypeName = `${groupName}${OPERATION_TYPE_SUFFIX_MAP[operationType]}`;
                const originalFieldMapWithHidden = {};
                const wrappedFieldMap = {};
                for (const fieldName in originalTypeConfig.fields) {
                    const originalFieldConfig = originalTypeConfig.fields[fieldName];
                    wrappedFieldMap[fieldName] = {
                        ...originalFieldConfig,
                        extensions: {
                            directives: {
                                resolveTo: [
                                    {
                                        sourceName: subgraphConfig.name,
                                        sourceTypeName: originalType.name,
                                        sourceFieldName: fieldName,
                                    },
                                ],
                            },
                        },
                    };
                    const newOriginalFieldConfig = {
                        ...originalFieldConfig,
                        astNode: undefined,
                    };
                    (0, filter_schema_js_1.addInaccessibleDirective)(newOriginalFieldConfig);
                    originalFieldMapWithHidden[fieldName] = newOriginalFieldConfig;
                }
                const wrappedType = new graphql_1.GraphQLObjectType({
                    name: wrappedTypeName,
                    fields: wrappedFieldMap,
                });
                newRootTypes[operationType] = new graphql_1.GraphQLObjectType({
                    ...originalTypeConfig,
                    fields: {
                        ...originalFieldMapWithHidden,
                        [groupName]: {
                            type: new graphql_1.GraphQLNonNull(wrappedType),
                            extensions: {
                                directives: {
                                    resolveTo: [
                                        {
                                            sourceName: subgraphConfig.name,
                                            sourceTypeName: originalType.name,
                                            sourceFieldName: '__typename',
                                        },
                                    ],
                                },
                            },
                        },
                    },
                });
            }
            else {
                newRootTypes[operationType] = originalType;
            }
        }
        const schemaConfig = schema.toConfig();
        const newDirectives = [...schemaConfig.directives];
        if (!newDirectives.some(directive => directive.name === 'resolveTo')) {
            newDirectives.push(exports.resolveToDirective);
        }
        return new graphql_1.GraphQLSchema({
            ...schemaConfig,
            types: undefined,
            directives: newDirectives,
            ...newRootTypes,
        });
    };
}
exports.resolveToSourceArgsScalar = new graphql_1.GraphQLScalarType({
    name: 'ResolveToSourceArgs',
});
exports.resolveToDirective = new graphql_1.GraphQLDirective({
    name: 'resolveTo',
    locations: [graphql_1.DirectiveLocation.FIELD_DEFINITION],
    args: {
        additionalArgs: { type: exports.resolveToSourceArgsScalar },
        filterBy: { type: graphql_1.GraphQLString },
        keyField: { type: graphql_1.GraphQLString },
        keysArg: { type: graphql_1.GraphQLString },
        pubsubTopic: { type: graphql_1.GraphQLString },
        requiredSelectionSet: { type: graphql_1.GraphQLString },
        result: { type: graphql_1.GraphQLString },
        resultType: { type: graphql_1.GraphQLString },
        sourceArgs: { type: exports.resolveToSourceArgsScalar },
        sourceFieldName: { type: graphql_1.GraphQLString },
        sourceName: { type: graphql_1.GraphQLString },
        sourceSelectionSet: { type: graphql_1.GraphQLString },
        sourceTypeName: { type: graphql_1.GraphQLString },
    },
});