Made .showembed always output lowercase field names and no null values

src/NadekoBot/Modules/Searches/Common/LowerCaseNamingPolicy.cs

@@ -0,0 +1,12 @@
+using System.Text.Json;
+
+namespace SystemTextJsonSamples
+{
+    public class LowerCaseNamingPolicy : JsonNamingPolicy
+    {
+        public static LowerCaseNamingPolicy Default = new LowerCaseNamingPolicy();
+        
+        public override string ConvertName(string name) =>
+            name.ToLower();
+    }
+}

src/NadekoBot/Modules/Utility/Utility.cs

@@ -11,11 +11,14 @@ using System.Diagnostics;
 using System.Linq;
 using System.Net.Http;
 using System.Text;
+using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
 using NadekoBot.Common.Replacements;
 using NadekoBot.Services;
 using Serilog;
+using SystemTextJsonSamples;
+using JsonSerializer = Newtonsoft.Json.JsonSerializer;
 
 namespace NadekoBot.Modules.Utility
 {
@@ -368,6 +371,13 @@ namespace NadekoBot.Modules.Utility
         public Task ShowEmbed(ulong messageId)
             => ShowEmbed((ITextChannel)ctx.Channel, messageId);
 
+        private static readonly JsonSerializerOptions _showEmbedSerializerOptions = new JsonSerializerOptions()
+        {
+            WriteIndented = true,
+            IgnoreNullValues = true,
+            PropertyNamingPolicy = LowerCaseNamingPolicy.Default
+        };
+            
         [NadekoCommand, Aliases]
         [RequireContext(ContextType.Guild)]
         public async Task ShowEmbed(ITextChannel ch, ulong messageId)
@@ -394,7 +404,7 @@ namespace NadekoBot.Modules.Utility
                 return;
             }
 
-            var json = SmartEmbedText.FromEmbed(embed, msg.Content).ToJson();
+            var json = SmartEmbedText.FromEmbed(embed, msg.Content).ToJson(_showEmbedSerializerOptions);
             await SendConfirmAsync(Format.Sanitize(json).Replace("](", "]\\("));
         }
 

src/NadekoBot/_Extensions/Extensions.cs

@@ -22,10 +22,12 @@ using System.Linq;
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Text;
+using System.Text.Json;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using NadekoBot.Common.Attributes;
 using Color = Discord.Color;
+using JsonSerializer = System.Text.Json.JsonSerializer;
 
 namespace NadekoBot.Extensions
 {
@@ -286,8 +288,8 @@ namespace NadekoBot.Extensions
         public static async Task<IEnumerable<IGuildUser>> GetMembersAsync(this IRole role) =>
             (await role.Guild.GetUsersAsync(CacheMode.CacheOnly).ConfigureAwait(false)).Where(u => u.RoleIds.Contains(role.Id)) ?? Enumerable.Empty<IGuildUser>();
 
-        public static string ToJson<T>(this T any, Formatting formatting = Formatting.Indented) =>
-            JsonConvert.SerializeObject(any, formatting);
+        public static string ToJson<T>(this T any, JsonSerializerOptions options = null) =>
+            JsonSerializer.Serialize(any, options);
 
         /// <summary>
         /// Adds fallback fonts to <see cref="TextOptions"/>