graphql-language-service
Version:
The official, runtime independent Language Service for GraphQL
63 lines • 2.36 kB
JavaScript
;
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 = (0, graphql_1.parse)(operationString);
}
catch (_a) {
return [];
}
return (0, exports.getFragmentDependenciesForAST)(parsedOperation, fragmentDefinitions);
};
exports.getFragmentDependencies = getFragmentDependencies;
const getFragmentDependenciesForAST = (parsedOperation, fragmentDefinitions) => {
if (!fragmentDefinitions) {
return [];
}
const existingFrags = new Map();
const referencedFragNames = new Set();
(0, 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();
for (const name of referencedFragNames) {
if (!existingFrags.has(name) && fragmentDefinitions.has(name)) {
asts.add((0, nullthrows_1.default)(fragmentDefinitions.get(name)));
}
}
const referencedFragments = [];
for (const ast of asts) {
(0, graphql_1.visit)(ast, {
FragmentSpread(node) {
if (!referencedFragNames.has(node.name.value) &&
fragmentDefinitions.get(node.name.value)) {
asts.add((0, 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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