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using System;
using System.Collections.Generic;
namespace Jellyfin.Extensions
{
/// <summary>
/// Static extensions for the <see cref="IReadOnlyDictionary{TKey,TValue}"/> interface.
/// </summary>
public static class DictionaryExtensions
{
/// <summary>
/// Gets a string from a string dictionary, checking all keys sequentially,
/// stopping at the first key that returns a result that's neither null nor blank.
/// </summary>
/// <param name="dictionary">The dictionary.</param>
/// <param name="key1">The first checked key.</param>
/// <returns>System.String.</returns>
public static string? GetFirstNotNullNorWhiteSpaceValue(this IReadOnlyDictionary<string, string> dictionary, string key1)
{
return dictionary.GetFirstNotNullNorWhiteSpaceValue(key1, string.Empty, string.Empty);
}
/// <summary>
/// Gets a string from a string dictionary, checking all keys sequentially,
/// stopping at the first key that returns a result that's neither null nor blank.
/// </summary>
/// <param name="dictionary">The dictionary.</param>
/// <param name="key1">The first checked key.</param>
/// <param name="key2">The second checked key.</param>
/// <returns>System.String.</returns>
public static string? GetFirstNotNullNorWhiteSpaceValue(this IReadOnlyDictionary<string, string> dictionary, string key1, string key2)
{
return dictionary.GetFirstNotNullNorWhiteSpaceValue(key1, key2, string.Empty);
}
/// <summary>
/// Gets a string from a string dictionary, checking all keys sequentially,
/// stopping at the first key that returns a result that's neither null nor blank.
/// </summary>
/// <param name="dictionary">The dictionary.</param>
/// <param name="key1">The first checked key.</param>
/// <param name="key2">The second checked key.</param>
/// <param name="key3">The third checked key.</param>
/// <returns>System.String.</returns>
public static string? GetFirstNotNullNorWhiteSpaceValue(this IReadOnlyDictionary<string, string> dictionary, string key1, string key2, string key3)
{
if (dictionary.TryGetValue(key1, out var val) && !string.IsNullOrWhiteSpace(val))
{
return val;
}
if (!string.IsNullOrEmpty(key2) && dictionary.TryGetValue(key2, out val) && !string.IsNullOrWhiteSpace(val))
{
return val;
}
if (!string.IsNullOrEmpty(key3) && dictionary.TryGetValue(key3, out val) && !string.IsNullOrWhiteSpace(val))
{
return val;
}
return null;
}
}
}
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