33 lines
671 B
Swift
33 lines
671 B
Swift
|
//
|
||
|
|
// DatabaseObject+Database.swift
|
||
|
|
// Database
|
||
|
|
//
|
||
|
|
// Created by Brent Simmons on 9/13/17.
|
||
|
|
// Copyright © 2017 Ranchero Software. All rights reserved.
|
||
|
|
//
|
||
|
|
|
||
|
|
import Foundation
|
||
|
|
import RSDatabase
|
||
|
|
import Data
|
||
|
|
|
||
|
|
extension Array where Element == DatabaseObject {
|
||
|
|
|
||
|
|
func asTags() -> Set<String>? {
|
||
|
|
|
||
|
|
let tags = Set(self.map { $0 as! String })
|
||
|
|
return tags.isEmpty ? nil : tags
|
||
|
|
}
|
||
|
|
|
||
|
|
func asAuthors() -> Set<Author>? {
|
||
|
|
|
||
|
|
let authors = Set(self.map { $0 as! Author })
|
||
|
|
return authors.isEmpty ? nil : authors
|
||
|
|
}
|
||
|
|
|
||
|
|
func asAttachments() -> Set<Attachment>? {
|
||
|
|
|
||
|
|
let attachments = Set(self.map { $0 as! Attachment })
|
||
|
|
return attachments.isEmpty ? nil : attachments
|
||
|
|
}
|
||
|
|
}
|