namespace Helpers
{
internal static class SubstringExtensions
{
/// <summary>
/// Get string value between [first] a and [last] b.
/// </summary>
public static string Between(this string value, string a, string b)
{
int posA = value.IndexOf(a);
int posB = value.LastIndexOf(b);
if (posA == -1)
{
return "";
}
if (posB == -1)
{
return "";
}
int adjustedPosA = posA + a.Length;
if (adjustedPosA >= posB)
{
return "";
}
return value.Substring(adjustedPosA, posB - adjustedPosA);
}
/// <summary>
/// Get string value after [first] a.
/// </summary>
public static string Before(this string value, string a)
{
int posA = value.IndexOf(a);
if (posA == -1)
{
return "";
}
return value.Substring(0, posA);
}
/// <summary>
/// Get string value after [last] a.
/// </summary>
public static string After(this string value, string a)
{
int posA = value.LastIndexOf(a);
if (posA == -1)
{
return "";
}
int adjustedPosA = posA + a.Length;
if (adjustedPosA >= value.Length)
{
return "";
}
return value.Substring(adjustedPosA);
}
}
}