With this code you can make an object Searchable and define which parameters that should be included in a search. Then you can easily call .fullyFilter(for: someString) on the object:

fuzzyFilter.swift

protocol Searchable {
	var keyPaths: [KeyPath<Self, String>] { get }
}

extension Searchable {
	func matches(_ searchString: String) -> Bool {
		for path in keyPaths {
			let value = self[keyPath: path]
			
			if value.localizedCaseInsensitiveContains(searchString) {
				return true
			}
		}
		
		return false
	}
}

extension Sequence where Element: Searchable {
	func fuzzyFilter(for searchString: String) -> [Element] {
		filter { $0.matches(searchString) }
	}
}