HistoryViewItem.swift

class HistoryPreviewItem: NSObject, QLPreviewItem {
    var share: Share!
    var source: NSRect!
    
    init(_ share: Share, source: NSRect = NSRect.zero) {
        super.init()
        self.share = share
        self.source = source
    }
    
    public var previewItemURL: URL! {
        get {
            return URL(string: share!.imageUrl!)!
        }
    }

    public var previewItemTitle: String! {
        get {
            return share.publishUrl
        }
    }
}