@kamilkisiela/graphql-tools
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Useful tools to create and manipulate GraphQL schemas.
351 lines • 14 kB
JavaScript
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
Object.defineProperty(exports, "__esModule", { value: true });
var graphql_1 = require("graphql");
var makeExecutableSchema_1 = require("../makeExecutableSchema");
var schemaRecreation_1 = require("./schemaRecreation");
var delegateToSchema_1 = require("./delegateToSchema");
var typeFromAST_1 = require("./typeFromAST");
var transforms_1 = require("../transforms");
var mergeDeep_1 = require("../mergeDeep");
var schemaVisitor_1 = require("../schemaVisitor");
function mergeSchemas(_a) {
var schemas = _a.schemas, onTypeConflict = _a.onTypeConflict, resolvers = _a.resolvers, schemaDirectives = _a.schemaDirectives, inheritResolversFromInterfaces = _a.inheritResolversFromInterfaces, mergeDirectives = _a.mergeDirectives;
return mergeSchemasImplementation({
schemas: schemas,
resolvers: resolvers,
schemaDirectives: schemaDirectives,
inheritResolversFromInterfaces: inheritResolversFromInterfaces,
mergeDirectives: mergeDirectives,
});
}
exports.default = mergeSchemas;
function mergeSchemasImplementation(_a) {
var schemas = _a.schemas, resolvers = _a.resolvers, schemaDirectives = _a.schemaDirectives, inheritResolversFromInterfaces = _a.inheritResolversFromInterfaces, mergeDirectives = _a.mergeDirectives;
var allSchemas = [];
var typeCandidates = {};
var types = {};
var extensions = [];
var directives = [];
var fragments = [];
var resolveType = schemaRecreation_1.createResolveType(function (name) {
if (types[name] === undefined) {
throw new Error("Can't find type " + name + ".");
}
return types[name];
});
schemas.forEach(function (schema) {
if (schema instanceof graphql_1.GraphQLSchema) {
allSchemas.push(schema);
var queryType_1 = schema.getQueryType();
var mutationType_1 = schema.getMutationType();
var subscriptionType_1 = schema.getSubscriptionType();
if (queryType_1) {
addTypeCandidate(typeCandidates, 'Query', {
schema: schema,
type: queryType_1,
});
}
if (mutationType_1) {
addTypeCandidate(typeCandidates, 'Mutation', {
schema: schema,
type: mutationType_1,
});
}
if (subscriptionType_1) {
addTypeCandidate(typeCandidates, 'Subscription', {
schema: schema,
type: subscriptionType_1,
});
}
if (mergeDirectives) {
var directiveInstances = schema.getDirectives();
directiveInstances.forEach(function (directive) {
directives.push(directive);
});
}
var typeMap_1 = schema.getTypeMap();
Object.keys(typeMap_1).forEach(function (typeName) {
var type = typeMap_1[typeName];
if (graphql_1.isNamedType(type) &&
graphql_1.getNamedType(type).name.slice(0, 2) !== '__' &&
type !== queryType_1 &&
type !== mutationType_1 &&
type !== subscriptionType_1) {
addTypeCandidate(typeCandidates, type.name, {
schema: schema,
type: type,
});
}
});
}
else if (typeof schema === 'string' ||
(schema && schema.kind === graphql_1.Kind.DOCUMENT)) {
var parsedSchemaDocument = typeof schema === 'string' ? graphql_1.parse(schema) : schema;
parsedSchemaDocument.definitions.forEach(function (def) {
var type = typeFromAST_1.default(def);
if (type instanceof graphql_1.GraphQLDirective && mergeDirectives) {
directives.push(type);
}
else if (type && !(type instanceof graphql_1.GraphQLDirective)) {
addTypeCandidate(typeCandidates, type.name, {
type: type,
});
}
});
var extensionsDocument = makeExecutableSchema_1.extractExtensionDefinitions(parsedSchemaDocument);
if (extensionsDocument.definitions.length > 0) {
extensions.push(extensionsDocument);
}
}
else if (Array.isArray(schema)) {
schema.forEach(function (type) {
addTypeCandidate(typeCandidates, type.name, {
type: type,
});
});
}
else {
throw new Error("Invalid schema passed");
}
});
var mergeInfo = createMergeInfo(allSchemas, fragments);
if (!resolvers) {
resolvers = {};
}
else if (typeof resolvers === 'function') {
console.warn('Passing functions as resolver parameter is deprecated. Use `info.mergeInfo` instead.');
resolvers = resolvers(mergeInfo);
}
else if (Array.isArray(resolvers)) {
resolvers = resolvers.reduce(function (left, right) {
if (typeof right === 'function') {
console.warn('Passing functions as resolver parameter is deprecated. Use `info.mergeInfo` instead.');
right = right(mergeInfo);
}
return mergeDeep_1.default(left, right);
}, {});
}
var generatedResolvers = {};
Object.keys(typeCandidates).forEach(function (typeName) {
var resultType = defaultVisitType(typeName, typeCandidates[typeName]);
if (resultType === null) {
types[typeName] = null;
}
else {
var type = void 0;
var typeResolvers = void 0;
if (graphql_1.isNamedType(resultType)) {
type = resultType;
}
else if (resultType.type) {
type = resultType.type;
typeResolvers = resultType.resolvers;
}
else {
throw new Error("Invalid visitType result for type " + typeName);
}
types[typeName] = schemaRecreation_1.recreateType(type, resolveType, false);
if (typeResolvers) {
generatedResolvers[typeName] = typeResolvers;
}
}
});
var mergedSchema = new graphql_1.GraphQLSchema({
query: types.Query,
mutation: types.Mutation,
subscription: types.Subscription,
types: Object.keys(types).map(function (key) { return types[key]; }),
directives: directives.map(function (directive) { return schemaRecreation_1.recreateDirective(directive, resolveType); })
});
extensions.forEach(function (extension) {
mergedSchema = graphql_1.extendSchema(mergedSchema, extension, {
commentDescriptions: true,
});
});
if (!resolvers) {
resolvers = {};
}
else if (Array.isArray(resolvers)) {
resolvers = resolvers.reduce(mergeDeep_1.default, {});
}
Object.keys(resolvers).forEach(function (typeName) {
var type = resolvers[typeName];
if (type instanceof graphql_1.GraphQLScalarType) {
return;
}
Object.keys(type).forEach(function (fieldName) {
var field = type[fieldName];
if (field.fragment) {
fragments.push({
field: fieldName,
fragment: field.fragment,
});
}
});
});
mergedSchema = makeExecutableSchema_1.addResolveFunctionsToSchema({
schema: mergedSchema,
resolvers: mergeDeep_1.default(generatedResolvers, resolvers),
inheritResolversFromInterfaces: inheritResolversFromInterfaces
});
forEachField(mergedSchema, function (field) {
if (field.resolve) {
var fieldResolver_1 = field.resolve;
field.resolve = function (parent, args, context, info) {
var newInfo = __assign({}, info, { mergeInfo: mergeInfo });
return fieldResolver_1(parent, args, context, newInfo);
};
}
if (field.subscribe) {
var fieldResolver_2 = field.subscribe;
field.subscribe = function (parent, args, context, info) {
var newInfo = __assign({}, info, { mergeInfo: mergeInfo });
return fieldResolver_2(parent, args, context, newInfo);
};
}
});
if (schemaDirectives) {
schemaVisitor_1.SchemaDirectiveVisitor.visitSchemaDirectives(mergedSchema, schemaDirectives);
}
return mergedSchema;
}
function createMergeInfo(allSchemas, fragments) {
return {
delegate: function (operation, fieldName, args, context, info, transforms) {
console.warn('`mergeInfo.delegate` is deprecated. ' +
'Use `mergeInfo.delegateToSchema and pass explicit schema instances.');
var schema = guessSchemaByRootField(allSchemas, operation, fieldName);
var expandTransforms = new transforms_1.ExpandAbstractTypes(info.schema, schema);
var fragmentTransform = new transforms_1.ReplaceFieldWithFragment(schema, fragments);
return delegateToSchema_1.default({
schema: schema,
operation: operation,
fieldName: fieldName,
args: args,
context: context,
info: info,
transforms: (transforms || []).concat([
expandTransforms,
fragmentTransform,
]),
});
},
delegateToSchema: function (options) {
return delegateToSchema_1.default(__assign({}, options, { transforms: options.transforms }));
},
fragments: fragments
};
}
function guessSchemaByRootField(schemas, operation, fieldName) {
for (var _i = 0, schemas_1 = schemas; _i < schemas_1.length; _i++) {
var schema = schemas_1[_i];
var rootObject = void 0;
if (operation === 'subscription') {
rootObject = schema.getSubscriptionType();
}
else if (operation === 'mutation') {
rootObject = schema.getMutationType();
}
else {
rootObject = schema.getQueryType();
}
if (rootObject) {
var fields = rootObject.getFields();
if (fields[fieldName]) {
return schema;
}
}
}
throw new Error("Could not find subschema with field `" + operation + "." + fieldName + "`");
}
function createDelegatingResolver(schema, operation, fieldName) {
return function (root, args, context, info) {
return info.mergeInfo.delegateToSchema({
schema: schema,
operation: operation,
fieldName: fieldName,
args: args,
context: context,
info: info,
});
};
}
function forEachField(schema, fn) {
var typeMap = schema.getTypeMap();
Object.keys(typeMap).forEach(function (typeName) {
var type = typeMap[typeName];
if (!graphql_1.getNamedType(type).name.startsWith('__') &&
type instanceof graphql_1.GraphQLObjectType) {
var fields_1 = type.getFields();
Object.keys(fields_1).forEach(function (fieldName) {
var field = fields_1[fieldName];
fn(field, typeName, fieldName);
});
}
});
}
function addTypeCandidate(typeCandidates, name, typeCandidate) {
if (!typeCandidates[name]) {
typeCandidates[name] = [];
}
typeCandidates[name].push(typeCandidate);
}
function defaultVisitType(name, candidates, candidateSelector) {
if (!candidateSelector) {
candidateSelector = function (cands) { return cands[cands.length - 1]; };
}
var resolveType = schemaRecreation_1.createResolveType(function (_, type) { return type; });
if (name === 'Query' || name === 'Mutation' || name === 'Subscription') {
var fields_2 = {};
var operationName_1;
switch (name) {
case 'Query':
operationName_1 = 'query';
break;
case 'Mutation':
operationName_1 = 'mutation';
break;
case 'Subscription':
operationName_1 = 'subscription';
break;
default:
break;
}
var resolvers_1 = {};
var resolverKey_1 = operationName_1 === 'subscription' ? 'subscribe' : 'resolve';
candidates.forEach(function (_a) {
var candidateType = _a.type, schema = _a.schema;
var candidateFields = candidateType.getFields();
fields_2 = __assign({}, fields_2, candidateFields);
Object.keys(candidateFields).forEach(function (fieldName) {
var _a;
resolvers_1[fieldName] = (_a = {},
_a[resolverKey_1] = createDelegatingResolver(schema, operationName_1, fieldName),
_a);
});
});
var type = new graphql_1.GraphQLObjectType({
name: name,
fields: schemaRecreation_1.fieldMapToFieldConfigMap(fields_2, resolveType, false),
});
return {
type: type,
resolvers: resolvers_1,
};
}
else {
var candidate = candidateSelector(candidates);
return candidate.type;
}
}
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