@theguild/federation-composition
Version:
Open Source Composition library for Apollo Federation
38 lines (37 loc) • 995 B
JavaScript
export function isDefined(value) {
return value !== undefined && value !== null;
}
export function ensureValue(value, message) {
if (isDefined(value)) {
return value;
}
throw new Error(message);
}
export function mathMax(firstValue, secondValue) {
if (secondValue === null) {
return firstValue;
}
return Math.max(firstValue, secondValue);
}
export function mathMaxNullable(left, right) {
if (typeof left === 'number') {
return mathMax(left, right ?? null);
}
if (typeof right === 'number') {
return mathMax(right, left ?? null);
}
return null;
}
export function nullableArrayUnion(left, right) {
if (!Array.isArray(left) && !Array.isArray(right)) {
return null;
}
const uniqueSet = new Set();
if (Array.isArray(left)) {
left.forEach(v => uniqueSet.add(v));
}
if (Array.isArray(right)) {
right.forEach(v => uniqueSet.add(v));
}
return Array.from(uniqueSet);
}