@tanstack/vue-table/dist/merge-proxy.js

Headless UI for building powerful tables & datagrids for Vue.

//#region src/merge-proxy.ts
function trueFn() {
	return true;
}
const $PROXY = Symbol("merge-proxy");
const $SOURCES = Symbol("merge-proxy-sources");
const propTraps = {
	get(_, property, receiver) {
		if (property === $PROXY) return receiver;
		if (property === $SOURCES) return _.sources;
		return _.get(property);
	},
	has(_, property) {
		return _.has(property);
	},
	set: trueFn,
	deleteProperty: trueFn,
	getOwnPropertyDescriptor(_, property) {
		return {
			configurable: true,
			enumerable: true,
			get() {
				return _.get(property);
			},
			set: trueFn,
			deleteProperty: trueFn
		};
	},
	ownKeys(_) {
		return _.keys();
	}
};
function resolveSource(s) {
	return s && typeof s === "object" && "value" in s ? s.value : s;
}
function mergeProxy(...sources) {
	const flattenedSources = sources.flatMap((source) => {
		if (typeof source === "object" && source !== null && $SOURCES in source && Array.isArray(source[$SOURCES])) return source[$SOURCES];
		return [source];
	});
	return new Proxy({
		sources: flattenedSources,
		get(property) {
			for (let i = flattenedSources.length - 1; i >= 0; i--) {
				const v = resolveSource(flattenedSources[i])[property];
				if (v !== void 0) return v;
			}
		},
		has(property) {
			for (let i = flattenedSources.length - 1; i >= 0; i--) if (property in resolveSource(flattenedSources[i])) return true;
			return false;
		},
		keys() {
			const keys = [];
			for (const source of flattenedSources) keys.push(...Object.keys(resolveSource(source)));
			return [...Array.from(new Set(keys))];
		}
	}, propTraps);
}
function flatMerge(...sources) {
	const result = {};
	for (let source of sources) {
		source = resolveSource(source);
		if (!source) continue;
		for (const key of Reflect.ownKeys(source)) {
			const value = source[key];
			if (value !== void 0) result[key] = value;
		}
	}
	return result;
}

//#endregion
export { flatMerge, mergeProxy };