convert raw id, string file to strings file

convert_strings.swift

/*
id.txt example:

stringid1
stringid2
...

eng.txt example:

hello
world
glad
to
see
you
...

usage: 
locate id.txt, eng.txt, convert_strings.swift to same folder
and run command `swift ./convert_strings.swift`
*/

import Foundation

func convertToStrings(idfile: String, stringfile: String) -> String {
    var result = ""
    guard 
        let ids = try? String(contentsOfFile: idfile),
        let strings = try? String(contentsOfFile: stringfile)
    else { return result }

    let idLines = ids.split(separator: "\n")
    let stringLines = strings.split(separator: "\n")

    let maxLine = min(idLines.count, stringLines.count)
    var currentLine = 0

    while currentLine < maxLine {
        result.append("\"\(idLines[currentLine])\" = \"\(stringLines[currentLine])\";\n")
        currentLine += 1
    }
    return result
}

try convertToStrings(idfile: "./id.txt", stringfile: "./eng.txt")
        .write(
            to: URL(fileURLWithPath: "./converted.strings"), 
            atomically: true, 
            encoding: .utf8
        )