namespace Sbroenne.ExcelMcp.Core.Commands;
/// <summary>
/// Shared helpers for rename validation and normalization rules.
/// </summary>
public static class RenameNameRules
{
/// <summary>
/// Trim leading/trailing whitespace; returns empty string for null input.
/// </summary>
public static string Normalize(string? name)
{
return name?.Trim() ?? string.Empty;
}
/// <summary>
/// True when the normalized value is empty.
/// </summary>
public static bool IsEmpty(string normalizedName)
{
return string.IsNullOrWhiteSpace(normalizedName);
}
/// <summary>
/// Determines if rename is a no-op (trimmed names identical including casing).
/// </summary>
public static bool IsNoOp(string normalizedOldName, string normalizedNewName)
{
return string.Equals(normalizedOldName, normalizedNewName, StringComparison.Ordinal);
}
/// <summary>
/// Checks for case-insensitive conflicts after trimming, excluding the target being renamed.
/// </summary>
public static bool HasConflict(IEnumerable<string> existingNames, string normalizedNewName, string normalizedTargetName)
{
return existingNames
.Select(Normalize)
.Where(normalizedExisting => !string.Equals(normalizedExisting, normalizedTargetName, StringComparison.OrdinalIgnoreCase))
.Any(normalizedExisting => string.Equals(normalizedExisting, normalizedNewName, StringComparison.OrdinalIgnoreCase));
}
}
