@graphql-mesh/utils
Version:
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getRootFieldsWithArgs = void 0;
const graphql_1 = require("graphql");
const utils_1 = require("@graphql-tools/utils");
const getOperationsAndFragments_js_1 = require("./getOperationsAndFragments.js");
function getRootFieldsWithArgs(schema, executionRequest) {
const rootTypeMap = (0, utils_1.getRootTypeMap)(schema);
const { document, variables, operationName } = executionRequest;
const { operations, fragments } = (0, getOperationsAndFragments_js_1.getOperationsAndFragments)(document);
const actualOperationName = operationName || Object.keys(operations)[0];
const operation = operations[actualOperationName];
if (!operation) {
throw new graphql_1.GraphQLError(`No operation found with name ${actualOperationName}`);
}
const operationType = operation.operation;
const rootType = rootTypeMap.get(operationType);
if (!rootType) {
throw new graphql_1.GraphQLError(`No root type found for operation type ${operationType}`);
}
const rootFieldMap = rootType.getFields();
const rootFieldsWithArgs = new Map();
const coercedVariables = (0, graphql_1.getVariableValues)(schema, operation.variableDefinitions || [], variables || {});
if (coercedVariables.errors) {
throw new AggregateError(coercedVariables.errors);
}
const selectionHandlerCtx = {
rootFieldMap,
rootFieldsWithArgs,
fragments,
variables: coercedVariables.coerced,
};
for (const selection of operation.selectionSet.selections) {
handleSelection(selection, selectionHandlerCtx);
}
return rootFieldsWithArgs;
}
exports.getRootFieldsWithArgs = getRootFieldsWithArgs;
function handleFieldNode(fieldNode, ctx) {
const originalFieldName = fieldNode.name.value;
const rootField = ctx.rootFieldMap[originalFieldName];
if (!rootField) {
throw new graphql_1.GraphQLError(`No root field found for field ${originalFieldName}`);
}
const args = (0, graphql_1.getArgumentValues)(rootField, fieldNode, ctx.variables);
ctx.rootFieldsWithArgs.set(originalFieldName, args);
}
function handleSelection(selection, ctx) {
switch (selection.kind) {
case graphql_1.Kind.FIELD: {
handleFieldNode(selection, ctx);
break;
}
case graphql_1.Kind.FRAGMENT_SPREAD: {
const fragmentName = selection.name.value;
const fragment = ctx.fragments[fragmentName];
if (!fragment) {
throw new graphql_1.GraphQLError(`Fragment ${fragmentName} not found`);
}
for (const fragmentSelection of fragment.selectionSet.selections) {
handleSelection(fragmentSelection, ctx);
}
break;
}
case graphql_1.Kind.INLINE_FRAGMENT: {
for (const inlineSelection of selection.selectionSet.selections) {
handleSelection(inlineSelection, ctx);
}
break;
}
}
}