Swiftgram/submodules/TelegramStringFormatting/Sources/Geo.swift

import Foundation
import MapKit
import TelegramPresentationData

private var sharedShortDistanceFormatter: MKDistanceFormatter?
public func shortStringForDistance(strings: PresentationStrings, distance: Int32) -> String {
    let distanceFormatter: MKDistanceFormatter
    if let currentDistanceFormatter = sharedShortDistanceFormatter {
        distanceFormatter = currentDistanceFormatter
    } else {
        distanceFormatter = MKDistanceFormatter()
        distanceFormatter.unitStyle = .abbreviated
        sharedShortDistanceFormatter = distanceFormatter
    }
    
    let locale = localeWithStrings(strings)
    if distanceFormatter.locale != locale {
        distanceFormatter.locale = locale
    }
    
    let distance = max(1, distance)
    var result = distanceFormatter.string(fromDistance: Double(distance))
    if result.hasPrefix("0 ") {
        result = result.replacingOccurrences(of: "0 ", with: "1 ")
    }
    return result
}