Changed accessibility of TextTable.columns to public private(set)

[EricRabil]

I'm writing an extension that allows JSON output for interaction with other scripts – it required me to open up access to the columns property. I thought I'd send it upstream for those in a similar boat.

I don't think write access is appropriate, as that is what the addRow/addRows functions are for.

[EricRabil]

Probably not perfect, but here's the extension I whipped up:

private extension Array where Element == TextTableColumn {
    var serializedView: NSMutableArray {
        let rows = map {
            $0.values.count
        }.sorted().last ?? 0
        
        print(rows)
        
        let array = NSMutableArray.init(capacity: rows)
        
        for _ in 1 ... rows {
            array.add(NSMutableDictionary())
        }
        
        forEach { column in
            column.values.indices.forEach { index in
                let value = column.values[index]
                
                let dict = array[index] as! NSMutableDictionary
                
                dict.setValue(value, forKey: column.header)
                
                array[index] = dict
            }
        }
        
        return array
    }
}

extension TextTable {
    var json: String {
        let dict = NSMutableDictionary()
        
        let items = columns.serializedView
        
        dict.setValue(items, forKey: "items")
        
        return String(data: try! JSONSerialization.data(withJSONObject: dict, options: .prettyPrinted), encoding: .utf8)!
    }
}