using System;
using System.Collections.Generic;

namespace LibSearchBox.Utilities
{
	public static class StringPlus
	{
		public static string ReplaceMultiple(this string str, char[] find, char[] replace)
		{
			for (int i = 0; i < find.Length; i++) {
				str = str.Replace(
					find[i],
					i < replace.Length ? replace[i] : replace[replace.Length - 1]
				);
			}
			return str;
		}

		// From https://stackoverflow.com/a/2641383/1460422
		public static IEnumerable<int> AllIndexesOf(this string str, string value)
		{
			if (String.IsNullOrEmpty(value))
				throw new ArgumentException("Error: The string to find may not be empty.", nameof(value));
			
			List<int> indexes = new List<int>();
			for (int index = 0; ; index += value.Length) {
				index = str.IndexOf(value, index);
				if (index == -1)
					break;
				yield return index;
			}
		}
	}
}