@theguild/federation-composition
Version:
Open Source Composition library for Apollo Federation
38 lines (37 loc) • 1.47 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.FEDERATION_V1 = void 0;
exports.extractLinkImplementations = extractLinkImplementations;
const link_js_1 = require("./link.js");
exports.FEDERATION_V1 = Symbol('Federation_V1');
function extractLinkImplementations(typeDefs) {
const links = link_js_1.FederatedLink.fromTypedefs(typeDefs);
const linkByIdentity = Object.fromEntries(links.map(l => [l.identity, l]));
const supportsFederationV2 = Object.keys(linkByIdentity).length > 0;
return {
links,
resolveImportName: (identity, name) => {
const matchingLink = linkByIdentity[identity];
if (!matchingLink) {
return name.startsWith('@') ? name.substring(1) : name;
}
return matchingLink.resolveImportName(name);
},
matchesImplementation: (identity, version) => {
if (version === exports.FEDERATION_V1) {
return !supportsFederationV2;
}
const matchingLink = linkByIdentity[identity];
if (!matchingLink) {
return false;
}
if (typeof version === 'string') {
return matchingLink.supports(version);
}
if (version === null) {
return matchingLink.supports(version);
}
return matchingLink.supports(version.major, version.minor);
},
};
}