@kamilkisiela/graphql-tools
Version:
Useful tools to create and manipulate GraphQL schemas.
163 lines • 8.97 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var graphql_1 = require("graphql");
var transforms_1 = require("../transforms/transforms");
var AddArgumentsAsVariables_1 = require("../transforms/AddArgumentsAsVariables");
var FilterToSchema_1 = require("../transforms/FilterToSchema");
var AddTypenameToAbstract_1 = require("../transforms/AddTypenameToAbstract");
var CheckResultAndHandleErrors_1 = require("../transforms/CheckResultAndHandleErrors");
var mapAsyncIterator_1 = require("./mapAsyncIterator");
var ExpandAbstractTypes_1 = require("../transforms/ExpandAbstractTypes");
var ReplaceFieldWithFragment_1 = require("../transforms/ReplaceFieldWithFragment");
var ConvertEnumResponse_1 = require("../transforms/ConvertEnumResponse");
function delegateToSchema(options) {
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
if (options instanceof graphql_1.GraphQLSchema) {
throw new Error('Passing positional arguments to delegateToSchema is a deprecated. ' +
'Please pass named parameters instead.');
}
return delegateToSchemaImplementation(options);
}
exports.default = delegateToSchema;
function delegateToSchemaImplementation(options) {
return __awaiter(this, void 0, void 0, function () {
var info, _a, args, operation, rawDocument, rawRequest, transforms, processedRequest, errors, _b, executionResult;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
info = options.info, _a = options.args, args = _a === void 0 ? {} : _a;
operation = options.operation || info.operation.operation;
rawDocument = createDocument(options.fieldName, operation, info.fieldNodes, Object.keys(info.fragments).map(function (fragmentName) { return info.fragments[fragmentName]; }), info.operation.variableDefinitions, info.operation.name);
rawRequest = {
document: rawDocument,
variables: info.variableValues,
};
transforms = (options.transforms || []).concat([
new ExpandAbstractTypes_1.default(info.schema, options.schema),
]);
if (info.mergeInfo && info.mergeInfo.fragments) {
transforms.push(new ReplaceFieldWithFragment_1.default(options.schema, info.mergeInfo.fragments));
}
transforms = transforms.concat([
new AddArgumentsAsVariables_1.default(options.schema, args),
new FilterToSchema_1.default(options.schema),
new AddTypenameToAbstract_1.default(options.schema),
new CheckResultAndHandleErrors_1.default(info, options.fieldName),
]);
if (graphql_1.isEnumType(options.info.returnType)) {
transforms = transforms.concat(new ConvertEnumResponse_1.default(options.info.returnType));
}
processedRequest = transforms_1.applyRequestTransforms(rawRequest, transforms);
if (!options.skipValidation) {
errors = graphql_1.validate(options.schema, processedRequest.document);
if (errors.length > 0) {
throw errors;
}
}
if (!(operation === 'query' || operation === 'mutation')) return [3 /*break*/, 2];
_b = transforms_1.applyResultTransforms;
return [4 /*yield*/, graphql_1.execute(options.schema, processedRequest.document, info.rootValue, options.context, processedRequest.variables)];
case 1: return [2 /*return*/, _b.apply(void 0, [_c.sent(),
transforms])];
case 2:
if (!(operation === 'subscription')) return [3 /*break*/, 4];
return [4 /*yield*/, graphql_1.subscribe(options.schema, processedRequest.document, info.rootValue, options.context, processedRequest.variables)];
case 3:
executionResult = (_c.sent());
// "subscribe" to the subscription result and map the result through the transforms
return [2 /*return*/, mapAsyncIterator_1.default(executionResult, function (result) {
var _a;
var transformedResult = transforms_1.applyResultTransforms(result, transforms);
var subscriptionKey = Object.keys(result.data)[0];
// for some reason the returned transformedResult needs to be nested inside the root subscription field
// does not work otherwise...
return _a = {},
_a[subscriptionKey] = transformedResult,
_a;
})];
case 4: return [2 /*return*/];
}
});
});
}
function createDocument(targetField, targetOperation, originalSelections, fragments, variables, operationName) {
var selections = [];
var args = [];
originalSelections.forEach(function (field) {
var fieldSelections = field.selectionSet
? field.selectionSet.selections
: [];
selections = selections.concat(fieldSelections);
args = args.concat(field.arguments || []);
});
var selectionSet = null;
if (selections.length > 0) {
selectionSet = {
kind: graphql_1.Kind.SELECTION_SET,
selections: selections,
};
}
var rootField = {
kind: graphql_1.Kind.FIELD,
alias: null,
arguments: args,
selectionSet: selectionSet,
name: {
kind: graphql_1.Kind.NAME,
value: targetField,
},
};
var rootSelectionSet = {
kind: graphql_1.Kind.SELECTION_SET,
selections: [rootField],
};
var operationDefinition = {
kind: graphql_1.Kind.OPERATION_DEFINITION,
operation: targetOperation,
variableDefinitions: variables,
selectionSet: rootSelectionSet,
name: operationName,
};
return {
kind: graphql_1.Kind.DOCUMENT,
definitions: [operationDefinition].concat(fragments),
};
}
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