/// <summary>
/// Checks if the value given for <paramref name="length"/> isn't bigger than the given <paramref name="stringLength"/>.
/// </summary>
/// <param name="stringLength">The amount of available characters from which the user wishes to select <paramref name="length"/> amount.</param>
/// <param name="length">Amount of characters the user wishes to select from a string with length "<paramref name="stringLength"/>".</param>
internal static void CheckLengthIsWithinBounds(int stringLength, int length)
{
int lengthDiff = stringLength - length;
if (lengthDiff < 0)
{
ExceptionThrower.Throw_Length_ArgumentOutOfRangeException(length, nameof(length), lengthDiff);
}
}
/// <summary>
/// Checks if <paramref name="substring"/> occurs in <paramref name="originalString"/> and if it doesn't, throws an
/// <see cref="ArgumentOutOfRangeException"/> that informs the user that the value "<paramref name="substring"/>" of
/// argument <paramref name="parameterName"/> is not found in said string. If the value of <paramref name="substring"/> is longer
/// than 10 characters the value displayed in the exception message will be truncated to 10.
/// <br/>In all cases the index of the last occurrence of <paramref name="substring"/> in <paramref name="originalString"/> is saved in <paramref name="substringIndex"/>.
/// </summary>
/// <param name="originalString">The instance which to check for <paramref name="substring"/>.</param>
/// <param name="substring">The string to search in <paramref name="originalString"/> for.</param>
/// <param name="parameterName">The name of the parameter in the original method, the argument of which is <paramref name="substring"/>.</param>
/// <param name="substringIndex">
/// Contains the index of <paramref name="substring"/> in <paramref name="originalString"/>. If it is not found the index is "-1".
/// <br/>This parameter is passed uninitialized.
/// </param>
/// <param name="stringComparison">The comparison rules to use when looking for <paramref name="substring"/>.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="substring"/> is not found in <paramref name="originalString"/>.
/// </exception>
internal static void CheckSubstringLastIndex(string originalString, string substring, string parameterName, out int substringIndex, StringComparison stringComparison = StringComparison.CurrentCulture)
{
substringIndex = originalString.LastIndexOf(substring, stringComparison);
if (substringIndex == -1)
{
ExceptionThrower.Throw_Substring_ArgumentOutOfRangeException(substring, parameterName);
}
}
/// <summary>
/// Checks if <paramref name="startString"/> occurs in <paramref name="originalString"/> and if it doesn't, throws an <see cref="ArgumentOutOfRangeException"/>.
/// If it does occur, then checks if <paramref name="endString"/> occurs in the part of <paramref name="originalString"/> that is after <paramref name="startString"/>
/// and if it doesn't, throws an <see cref="ArgumentOutOfRangeException"/> that informs the user the value of <paramref name="endString"/> was
/// not found after <paramref name="startString"/> in said string. If the value of either <paramref name="startString"/> or <paramref name="endString"/>
/// is longer than 10 characters the value displayed in the exception message will be truncated to 10.
/// <br/>In all cases the index of the first occurrence of <paramref name="startString"/> and the index of the last occurrence of <paramref name="endString"/>
/// are saved in <paramref name="startStringIndex"/> and <paramref name="endStringIndex"/>, respectively.
/// </summary>
/// <param name="originalString">The instance which to check <paramref name="startString"/>.</param>
/// <param name="startString">The value used for the start of the substring in the calling method.</param>
/// <param name="endString">The string to search in <paramref name="originalString"/>.</param>
/// <param name="startStringIndex">
/// Contains the index of <paramref name="startString"/> in <paramref name="originalString"/>. If it is not found the index is "-1".
/// <br/>This parameter is passed uninitialized.
/// </param>
/// <param name="endStringIndex">
/// Contains the index of <paramref name="endString"/> in <paramref name="originalString"/>. If it is not found the index is "-1".
/// <br/>This parameter is passed uninitialized.
/// </param>
/// <param name="stringComparison">The comparison rules to use when looking for the strings.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="endString"/> is not found in the part of <paramref name="originalString"/> from <paramref name="startString"/> onward.
/// </exception>
internal static void CheckEndStringLastIndex(string originalString, string startString, string endString, out int startStringIndex, out int endStringIndex, StringComparison stringComparison = StringComparison.CurrentCulture)
{
CheckSubstringIndex(originalString, startString, nameof(startString), out startStringIndex, stringComparison);
string substringStartStringOnwards = originalString.Substring(startStringIndex + startString.Length);
endStringIndex = substringStartStringOnwards.LastIndexOf(endString, stringComparison);
if (endStringIndex == -1)
{
ExceptionThrower.Throw_Endstring_ArgumentOutOfRangeException(startString, endString);
}
}