package org.the_jk.cleversync

object StringUtils {
    fun split(input: String, delimiter: Char, keepEmpty: Boolean = true, limit: Int = 0): List<String> {
        return buildList {
            var offset = 0
            var count = 0
            while (true) {
                val next = input.indexOf(delimiter, offset)
                if (next == -1) {
                    if (keepEmpty || offset < input.length) {
                        if (limit > 0 && count == limit) {
                            add("${removeLast()}${delimiter}${input.substring(offset)}")
                            break
                        }
                        add(input.substring(offset))
                    }
                    break
                }
                if (keepEmpty || offset < next) {
                    if (limit > 0 && count == limit) {
                        add("${removeLast()}${delimiter}${input.substring(offset)}")
                        break
                    }
                    add(input.substring(offset, next))
                    count++
                }
                offset = next + 1
            }
        }
    }
}