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Discord.Net/src/Discord.Net.Core/Utils/Preconditions.cs

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  1. using System;

  2. 

  3. namespace Discord

  4. {

  5.     internal static class Preconditions

  6.     {

  7.         //Objects

  8.         public static void NotNull<T>(T obj, string name, string msg = null) where T : class { if (obj == null) throw CreateNotNullException(name, msg); }

  9.         public static void NotNull<T>(Optional<T> obj, string name, string msg = null) where T : class { if (obj.IsSpecified && obj.Value == null) throw CreateNotNullException(name, msg); }

  10. 

  11.         private static ArgumentNullException CreateNotNullException(string name, string msg)

  12.         {

  13.             if (msg == null) return new ArgumentNullException(name);

  14.             else return new ArgumentNullException(name, msg);

  15.         }

  16. 

  17.         //Strings

  18.         public static void NotEmpty(string obj, string name, string msg = null) { if (obj.Length == 0) throw CreateNotEmptyException(name, msg); }

  19.         public static void NotEmpty(Optional<string> obj, string name, string msg = null) { if (obj.IsSpecified && obj.Value.Length == 0) throw CreateNotEmptyException(name, msg); }

  20.         public static void NotNullOrEmpty(string obj, string name, string msg = null)

  21.         {

  22.             if (obj == null) throw CreateNotNullException(name, msg);

  23.             if (obj.Length == 0) throw CreateNotEmptyException(name, msg);

  24.         }

  25.         public static void NotNullOrEmpty(Optional<string> obj, string name, string msg = null)

  26.         {

  27.             if (obj.IsSpecified)

  28.             {

  29.                 if (obj.Value == null) throw CreateNotNullException(name, msg);

  30.                 if (obj.Value.Length == 0) throw CreateNotEmptyException(name, msg);

  31.             }

  32.         }

  33.         public static void NotNullOrWhitespace(string obj, string name, string msg = null)

  34.         {

  35.             if (obj == null) throw CreateNotNullException(name, msg);

  36.             if (obj.Trim().Length == 0) throw CreateNotEmptyException(name, msg);

  37.         }

  38.         public static void NotNullOrWhitespace(Optional<string> obj, string name, string msg = null)

  39.         {

  40.             if (obj.IsSpecified)

  41.             {

  42.                 if (obj.Value == null) throw CreateNotNullException(name, msg);

  43.                 if (obj.Value.Trim().Length == 0) throw CreateNotEmptyException(name, msg);

  44.             }

  45.         }        

  46. 

  47.         private static ArgumentException CreateNotEmptyException(string name, string msg)

  48.         {

  49.             if (msg == null) return new ArgumentException("Argument cannot be blank", name);

  50.             else return new ArgumentException(name, msg);

  51.         }

  52. 

  53.         //Numerics

  54.         public static void NotEqual(sbyte obj, sbyte value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  55.         public static void NotEqual(byte obj, byte value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  56.         public static void NotEqual(short obj, short value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  57.         public static void NotEqual(ushort obj, ushort value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  58.         public static void NotEqual(int obj, int value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  59.         public static void NotEqual(uint obj, uint value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  60.         public static void NotEqual(long obj, long value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  61.         public static void NotEqual(ulong obj, ulong value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  62.         public static void NotEqual(Optional<sbyte> obj, sbyte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  63.         public static void NotEqual(Optional<byte> obj, byte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  64.         public static void NotEqual(Optional<short> obj, short value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  65.         public static void NotEqual(Optional<ushort> obj, ushort value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  66.         public static void NotEqual(Optional<int> obj, int value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  67.         public static void NotEqual(Optional<uint> obj, uint value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  68.         public static void NotEqual(Optional<long> obj, long value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  69.         public static void NotEqual(Optional<ulong> obj, ulong value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  70.         public static void NotEqual(sbyte? obj, sbyte value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  71.         public static void NotEqual(byte? obj, byte value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  72.         public static void NotEqual(short? obj, short value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  73.         public static void NotEqual(ushort? obj, ushort value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  74.         public static void NotEqual(int? obj, int value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  75.         public static void NotEqual(uint? obj, uint value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  76.         public static void NotEqual(long? obj, long value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  77.         public static void NotEqual(ulong? obj, ulong value, string name, string msg = null) { if (obj == value) throw CreateNotEqualException(name, msg, value); }

  78.         public static void NotEqual(Optional<sbyte?> obj, sbyte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  79.         public static void NotEqual(Optional<byte?> obj, byte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  80.         public static void NotEqual(Optional<short?> obj, short value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  81.         public static void NotEqual(Optional<ushort?> obj, ushort value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  82.         public static void NotEqual(Optional<int?> obj, int value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  83.         public static void NotEqual(Optional<uint?> obj, uint value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  84.         public static void NotEqual(Optional<long?> obj, long value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  85.         public static void NotEqual(Optional<ulong?> obj, ulong value, string name, string msg = null) { if (obj.IsSpecified && obj.Value == value) throw CreateNotEqualException(name, msg, value); }

  86. 

  87.         private static ArgumentException CreateNotEqualException<T>(string name, string msg, T value)

  88.         {

  89.             if (msg == null) return new ArgumentException($"Value may not be equal to {value}", name);

  90.             else return new ArgumentException(msg, name);

  91.         }

  92. 

  93.         public static void AtLeast(sbyte obj, sbyte value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  94.         public static void AtLeast(byte obj, byte value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  95.         public static void AtLeast(short obj, short value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  96.         public static void AtLeast(ushort obj, ushort value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  97.         public static void AtLeast(int obj, int value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  98.         public static void AtLeast(uint obj, uint value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  99.         public static void AtLeast(long obj, long value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  100.         public static void AtLeast(ulong obj, ulong value, string name, string msg = null) { if (obj < value) throw CreateAtLeastException(name, msg, value); }

  101.         public static void AtLeast(Optional<sbyte> obj, sbyte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  102.         public static void AtLeast(Optional<byte> obj, byte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  103.         public static void AtLeast(Optional<short> obj, short value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  104.         public static void AtLeast(Optional<ushort> obj, ushort value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  105.         public static void AtLeast(Optional<int> obj, int value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  106.         public static void AtLeast(Optional<uint> obj, uint value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  107.         public static void AtLeast(Optional<long> obj, long value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  108.         public static void AtLeast(Optional<ulong> obj, ulong value, string name, string msg = null) { if (obj.IsSpecified && obj.Value < value) throw CreateAtLeastException(name, msg, value); }

  109. 

  110.         private static ArgumentException CreateAtLeastException<T>(string name, string msg, T value)

  111.         {

  112.             if (msg == null) return new ArgumentException($"Value must be at least {value}", name);

  113.             else return new ArgumentException(msg, name);

  114.         }

  115. 

  116.         public static void GreaterThan(sbyte obj, sbyte value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  117.         public static void GreaterThan(byte obj, byte value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  118.         public static void GreaterThan(short obj, short value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  119.         public static void GreaterThan(ushort obj, ushort value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  120.         public static void GreaterThan(int obj, int value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  121.         public static void GreaterThan(uint obj, uint value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  122.         public static void GreaterThan(long obj, long value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  123.         public static void GreaterThan(ulong obj, ulong value, string name, string msg = null) { if (obj <= value) throw CreateGreaterThanException(name, msg, value); }

  124.         public static void GreaterThan(Optional<sbyte> obj, sbyte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  125.         public static void GreaterThan(Optional<byte> obj, byte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  126.         public static void GreaterThan(Optional<short> obj, short value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  127.         public static void GreaterThan(Optional<ushort> obj, ushort value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  128.         public static void GreaterThan(Optional<int> obj, int value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  129.         public static void GreaterThan(Optional<uint> obj, uint value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  130.         public static void GreaterThan(Optional<long> obj, long value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  131.         public static void GreaterThan(Optional<ulong> obj, ulong value, string name, string msg = null) { if (obj.IsSpecified && obj.Value <= value) throw CreateGreaterThanException(name, msg, value); }

  132. 

  133.         private static ArgumentException CreateGreaterThanException<T>(string name, string msg, T value)

  134.         {

  135.             if (msg == null) return new ArgumentException($"Value must be greater than {value}", name);

  136.             else return new ArgumentException(msg, name);

  137.         }

  138. 

  139.         public static void AtMost(sbyte obj, sbyte value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  140.         public static void AtMost(byte obj, byte value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  141.         public static void AtMost(short obj, short value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  142.         public static void AtMost(ushort obj, ushort value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  143.         public static void AtMost(int obj, int value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  144.         public static void AtMost(uint obj, uint value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  145.         public static void AtMost(long obj, long value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  146.         public static void AtMost(ulong obj, ulong value, string name, string msg = null) { if (obj > value) throw CreateAtMostException(name, msg, value); }

  147.         public static void AtMost(Optional<sbyte> obj, sbyte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  148.         public static void AtMost(Optional<byte> obj, byte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  149.         public static void AtMost(Optional<short> obj, short value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  150.         public static void AtMost(Optional<ushort> obj, ushort value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  151.         public static void AtMost(Optional<int> obj, int value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  152.         public static void AtMost(Optional<uint> obj, uint value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  153.         public static void AtMost(Optional<long> obj, long value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  154.         public static void AtMost(Optional<ulong> obj, ulong value, string name, string msg = null) { if (obj.IsSpecified && obj.Value > value) throw CreateAtMostException(name, msg, value); }

  155. 

  156.         private static ArgumentException CreateAtMostException<T>(string name, string msg, T value)

  157.         {

  158.             if (msg == null) return new ArgumentException($"Value must be at most {value}", name);

  159.             else return new ArgumentException(msg, name);

  160.         }

  161. 

  162.         public static void LessThan(sbyte obj, sbyte value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  163.         public static void LessThan(byte obj, byte value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  164.         public static void LessThan(short obj, short value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  165.         public static void LessThan(ushort obj, ushort value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  166.         public static void LessThan(int obj, int value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  167.         public static void LessThan(uint obj, uint value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  168.         public static void LessThan(long obj, long value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  169.         public static void LessThan(ulong obj, ulong value, string name, string msg = null) { if (obj >= value) throw CreateLessThanException(name, msg, value); }

  170.         public static void LessThan(Optional<sbyte> obj, sbyte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  171.         public static void LessThan(Optional<byte> obj, byte value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  172.         public static void LessThan(Optional<short> obj, short value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  173.         public static void LessThan(Optional<ushort> obj, ushort value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  174.         public static void LessThan(Optional<int> obj, int value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  175.         public static void LessThan(Optional<uint> obj, uint value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  176.         public static void LessThan(Optional<long> obj, long value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  177.         public static void LessThan(Optional<ulong> obj, ulong value, string name, string msg = null) { if (obj.IsSpecified && obj.Value >= value) throw CreateLessThanException(name, msg, value); }

  178. 

  179.         private static ArgumentException CreateLessThanException<T>(string name, string msg, T value)

  180.         {

  181.             if (msg == null) return new ArgumentException($"Value must be less than {value}", name);

  182.             else return new ArgumentException(msg, name);

  183.         }

  184. 

  185.         // Bulk Delete

  186.         public static void YoungerThanTwoWeeks(ulong[] collection, string name)

  187.         {

  188.             var minimum = SnowflakeUtils.ToSnowflake(DateTimeOffset.UtcNow.Subtract(TimeSpan.FromDays(14)));

  189.             for (var i = 0; i < collection.Length; i++)

  190.             {

  191.                 if (collection[i] == 0) continue;

  192.                 if (collection[i] <= minimum)

  193.                     throw new ArgumentOutOfRangeException(name, "Messages must be younger than two weeks old.");

  194.             }

  195.         }

  196.         public static void NotEveryoneRole(ulong[] roles, ulong guildId, string name)

  197.         {

  198.             for (var i = 0; i < roles.Length; i++)

  199.             {

  200.                 if (roles[i] == guildId)

  201.                     throw new ArgumentException($"The everyone role cannot be assigned to a user", name);

  202.             }

  203.         }

  204.     }

  205. }
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