graphql-language-service-utils/dist/fragmentDependencies.js

Utilities to support the GraphQL Language Service

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getFragmentDependenciesForAST = exports.getFragmentDependencies = void 0;
const graphql_1 = require("graphql");
const nullthrows_1 = __importDefault(require("nullthrows"));
const getFragmentDependencies = (operationString, fragmentDefinitions) => {
    if (!fragmentDefinitions) {
        return [];
    }
    let parsedOperation;
    try {
        parsedOperation = graphql_1.parse(operationString);
    }
    catch (error) {
        return [];
    }
    return exports.getFragmentDependenciesForAST(parsedOperation, fragmentDefinitions);
};
exports.getFragmentDependencies = getFragmentDependencies;
const getFragmentDependenciesForAST = (parsedOperation, fragmentDefinitions) => {
    if (!fragmentDefinitions) {
        return [];
    }
    const existingFrags = new Map();
    const referencedFragNames = new Set();
    graphql_1.visit(parsedOperation, {
        FragmentDefinition(node) {
            existingFrags.set(node.name.value, true);
        },
        FragmentSpread(node) {
            if (!referencedFragNames.has(node.name.value)) {
                referencedFragNames.add(node.name.value);
            }
        },
    });
    const asts = new Set();
    referencedFragNames.forEach(name => {
        if (!existingFrags.has(name) && fragmentDefinitions.has(name)) {
            asts.add(nullthrows_1.default(fragmentDefinitions.get(name)));
        }
    });
    const referencedFragments = [];
    asts.forEach(ast => {
        graphql_1.visit(ast, {
            FragmentSpread(node) {
                if (!referencedFragNames.has(node.name.value) &&
                    fragmentDefinitions.get(node.name.value)) {
                    asts.add(nullthrows_1.default(fragmentDefinitions.get(node.name.value)));
                    referencedFragNames.add(node.name.value);
                }
            },
        });
        if (!existingFrags.has(ast.name.value)) {
            referencedFragments.push(ast);
        }
    });
    return referencedFragments;
};
exports.getFragmentDependenciesForAST = getFragmentDependenciesForAST;
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