@apollo/query-graphs
Version:
Apollo Federation library to work with 'query graphs'
56 lines • 2.31 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.emptyContext = exports.PathContext = exports.extractOperationConditionals = exports.isPathContext = void 0;
const federation_internals_1 = require("@apollo/federation-internals");
const deep_equal_1 = __importDefault(require("deep-equal"));
function isPathContext(v) {
return v instanceof PathContext;
}
exports.isPathContext = isPathContext;
function extractOperationConditionals(operation) {
const conditionals = [];
addExtractedConditional(operation, 'skip', conditionals);
addExtractedConditional(operation, 'include', conditionals);
return conditionals;
}
exports.extractOperationConditionals = extractOperationConditionals;
function addExtractedConditional(operation, kind, addTo) {
const applied = operation.appliedDirectivesOf(kind);
if (applied.length > 0) {
(0, federation_internals_1.assert)(applied.length === 1, () => `${kind} shouldn't be repeated on ${operation}`);
const value = applied[0].arguments()['if'];
(0, federation_internals_1.assert)(typeof value === 'boolean' || (0, federation_internals_1.isVariable)(value), () => `Invalid value ${value} found as condition of @${kind}`);
addTo.push({ kind, value });
}
}
class PathContext {
constructor(conditionals) {
this.conditionals = conditionals;
}
isEmpty() {
return this.conditionals.length === 0;
}
withContextOf(operation) {
if (operation.appliedDirectives.length === 0) {
return this;
}
const newConditionals = extractOperationConditionals(operation);
return newConditionals.length === 0
? this
: new PathContext(newConditionals.concat(this.conditionals));
}
equals(that) {
return (0, deep_equal_1.default)(this.conditionals, that.conditionals);
}
toString() {
return '['
+ this.conditionals.map(({ kind, value }) => `@${kind}(if: ${value})`).join(', ')
+ ']';
}
}
exports.PathContext = PathContext;
exports.emptyContext = new PathContext([]);
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