171 lines
7.0 KiB
C#
171 lines
7.0 KiB
C#
namespace Unosquare.Swan.Components
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{
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using Abstractions;
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/// <summary>
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/// Provide Enumerations helpers with internal cache.
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/// </summary>
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public class EnumHelper
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: SingletonBase<CollectionCacheRepository<Tuple<string, object>>>
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{
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/// <summary>
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/// Gets all the names and enumerators from a specific Enum type.
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/// </summary>
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/// <typeparam name="T">The type of the attribute to be retrieved.</typeparam>
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/// <returns>A tuple of enumerator names and their value stored for the specified type.</returns>
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public static IEnumerable<Tuple<string, object>> Retrieve<T>()
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where T : struct, IConvertible
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{
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return Instance.Retrieve(typeof(T), t => Enum.GetValues(t)
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.Cast<object>()
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.Select(item => Tuple.Create(Enum.GetName(t, item), item)));
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}
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/// <summary>
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/// Gets the cached items with the enum item value.
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/// </summary>
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/// <typeparam name="T">The type of enumeration.</typeparam>
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/// <param name="humanize">if set to <c>true</c> [humanize].</param>
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/// <returns>
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/// A collection of Type/Tuple pairs
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/// that represents items with the enum item value.
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/// </returns>
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public static IEnumerable<Tuple<int, string>> GetItemsWithValue<T>(bool humanize = true)
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where T : struct, IConvertible
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{
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return Retrieve<T>()
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.Select(x => Tuple.Create((int) x.Item2, humanize ? x.Item1.Humanize() : x.Item1));
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}
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/// <summary>
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/// Gets the flag values.
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/// </summary>
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/// <typeparam name="TEnum">The type of the enum.</typeparam>
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/// <param name="value">The value.</param>
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/// <param name="ignoreZero">if set to <c>true</c> [ignore zero].</param>
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/// <returns>
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/// A list of values in the flag.
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/// </returns>
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public static IEnumerable<int> GetFlagValues<TEnum>(int value, bool ignoreZero = false)
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where TEnum : struct, IConvertible
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{
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return Retrieve<TEnum>()
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.Select(x => (int) x.Item2)
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.When(() => ignoreZero, q => q.Where(f => f != 0))
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.Where(x => (x & value) == x);
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}
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/// <summary>
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/// Gets the flag values.
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/// </summary>
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/// <typeparam name="TEnum">The type of the enum.</typeparam>
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/// <param name="value">The value.</param>
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/// <param name="ignoreZero">if set to <c>true</c> [ignore zero].</param>
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/// <returns>
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/// A list of values in the flag.
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/// </returns>
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public static IEnumerable<long> GetFlagValues<TEnum>(long value, bool ignoreZero = false)
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where TEnum : struct, IConvertible
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{
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return Retrieve<TEnum>()
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.Select(x => (long) x.Item2)
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.When(() => ignoreZero, q => q.Where(f => f != 0))
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.Where(x => (x & value) == x);
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}
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/// <summary>
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/// Gets the flag values.
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/// </summary>
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/// <typeparam name="TEnum">The type of the enum.</typeparam>
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/// <param name="value">The value.</param>
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/// <param name="ignoreZero">if set to <c>true</c> [ignore zero].</param>
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/// <returns>
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/// A list of values in the flag.
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/// </returns>
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public static IEnumerable<byte> GetFlagValues<TEnum>(byte value, bool ignoreZero = false)
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where TEnum : struct, IConvertible
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{
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return Retrieve<TEnum>()
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.Select(x => (byte) x.Item2)
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.When(() => ignoreZero, q => q.Where(f => f != 0))
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.Where(x => (x & value) == x);
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}
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/// <summary>
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/// Gets the flag names.
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/// </summary>
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/// <typeparam name="TEnum">The type of the enum.</typeparam>
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/// <param name="value">the value.</param>
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/// <param name="ignoreZero">if set to <c>true</c> [ignore zero].</param>
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/// <param name="humanize">if set to <c>true</c> [humanize].</param>
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/// <returns>
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/// A list of flag names.
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/// </returns>
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public static IEnumerable<string> GetFlagNames<TEnum>(int value, bool ignoreZero = false, bool humanize = true)
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where TEnum : struct, IConvertible
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{
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return Retrieve<TEnum>()
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.When(() => ignoreZero, q => q.Where(f => (int) f.Item2 != 0))
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.Where(x => ((int) x.Item2 & value) == (int) x.Item2)
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.Select(x => humanize ? x.Item1.Humanize() : x.Item1);
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}
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/// <summary>
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/// Gets the flag names.
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/// </summary>
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/// <typeparam name="TEnum">The type of the enum.</typeparam>
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/// <param name="value">The value.</param>
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/// <param name="ignoreZero">if set to <c>true</c> [ignore zero].</param>
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/// <param name="humanize">if set to <c>true</c> [humanize].</param>
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/// <returns>
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/// A list of flag names.
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/// </returns>
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public static IEnumerable<string> GetFlagNames<TEnum>(long value, bool ignoreZero = false, bool humanize = true)
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where TEnum : struct, IConvertible
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{
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return Retrieve<TEnum>()
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.When(() => ignoreZero, q => q.Where(f => (long) f.Item2 != 0))
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.Where(x => ((long) x.Item2 & value) == (long) x.Item2)
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.Select(x => humanize ? x.Item1.Humanize() : x.Item1);
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}
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/// <summary>
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/// Gets the flag names.
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/// </summary>
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/// <typeparam name="TEnum">The type of the enum.</typeparam>
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/// <param name="value">The value.</param>
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/// <param name="ignoreZero">if set to <c>true</c> [ignore zero].</param>
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/// <param name="humanize">if set to <c>true</c> [humanize].</param>
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/// <returns>
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/// A list of flag names.
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/// </returns>
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public static IEnumerable<string> GetFlagNames<TEnum>(byte value, bool ignoreZero = false, bool humanize = true)
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where TEnum : struct, IConvertible
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{
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return Retrieve<TEnum>()
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.When(() => ignoreZero, q => q.Where(f => (byte) f.Item2 != 0))
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.Where(x => ((byte) x.Item2 & value) == (byte) x.Item2)
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.Select(x => humanize ? x.Item1.Humanize() : x.Item1);
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}
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/// <summary>
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/// Gets the cached items with the enum item index.
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/// </summary>
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/// <typeparam name="T">The type of enumeration.</typeparam>
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/// <param name="humanize">if set to <c>true</c> [humanize].</param>
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/// <returns>
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/// A collection of Type/Tuple pairs that represents items with the enum item value.
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/// </returns>
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public static IEnumerable<Tuple<int, string>> GetItemsWithIndex<T>(bool humanize = true)
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where T : struct, IConvertible
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{
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var i = 0;
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return Retrieve<T>()
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.Select(x => Tuple.Create(i++, humanize ? x.Item1.Humanize() : x.Item1));
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}
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}
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} |