Switch JSON serialization to Newtonsoft.Json

Replaced System.Text.Json with Newtonsoft.Json (JsonConvert) for all serialization and deserialization in EF Core entity configs, audit logging, and plugin metadata reading. Added Newtonsoft.Json NuGet package and removed unused System.Text.Json references.

#50

Author: ziagham

src/FlowSynx.PluginRegistry.Infrastructure/Configurations/PluginVersionEntityConfiguration.cs

@@ -3,6 +3,7 @@
 using Microsoft.EntityFrameworkCore.ChangeTracking;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Newtonsoft.Json;
 
 namespace FlowSynx.PluginRegistry.Infrastructure.Configurations;
 
@@ -62,8 +63,8 @@ public void Configure(EntityTypeBuilder<PluginVersionEntity> builder)
 
         // JSON serialization for plugin specifications
         var pluginSpecificationConverter = new ValueConverter<List<PluginSpecification>?, string>(
-            v => System.Text.Json.JsonSerializer.Serialize(v),
-            v => System.Text.Json.JsonSerializer.Deserialize<List<PluginSpecification>?>(v)
+            v => JsonConvert.SerializeObject(v),
+            v => JsonConvert.DeserializeObject<List<PluginSpecification>?>(v)
         );
 
         builder.Property(e => e.Specifications)
@@ -72,8 +73,8 @@ public void Configure(EntityTypeBuilder<PluginVersionEntity> builder)
 
         // JSON serialization for plugin operations
         var pluginOperationConverter = new ValueConverter<List<PluginOperation>?, string>(
-            v => System.Text.Json.JsonSerializer.Serialize(v),
-            v => System.Text.Json.JsonSerializer.Deserialize<List<PluginOperation>?>(v)
+            v => JsonConvert.SerializeObject(v),
+            v => JsonConvert.DeserializeObject<List<PluginOperation>?>(v)
         );
 
         builder.Property(e => e.Operations)

src/FlowSynx.PluginRegistry.Infrastructure/FlowSynx.PluginRegistry.Infrastructure.csproj

@@ -10,6 +10,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.3.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.2" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="9.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
   </ItemGroup>
 

src/FlowSynx.PluginRegistry.Infrastructure/Models/Audit/AuditEntry.cs

@@ -1,6 +1,6 @@
-using System.Text.Json;
-using FlowSynx.PluginRegistry.Domain.Audit;
+using FlowSynx.PluginRegistry.Domain.Audit;
 using Microsoft.EntityFrameworkCore.ChangeTracking;
+using Newtonsoft.Json;
 
 namespace FlowSynx.PluginRegistry.Infrastructure.Models.Audit;
 
@@ -30,10 +30,10 @@ public AuditEntity ToAudit()
             Type = AuditType.ToString(),
             TableName = TableName,
             DateTime = DateTime.UtcNow,
-            PrimaryKey = JsonSerializer.Serialize(KeyValues),
-            OldValues = OldValues.Count == 0 ? null : JsonSerializer.Serialize(OldValues),
-            NewValues = NewValues.Count == 0 ? null : JsonSerializer.Serialize(NewValues),
-            AffectedColumns = ChangedColumns.Count == 0 ? null : JsonSerializer.Serialize(ChangedColumns)
+            PrimaryKey = JsonConvert.SerializeObject(KeyValues),
+            OldValues = OldValues.Count == 0 ? null : JsonConvert.SerializeObject(OldValues),
+            NewValues = NewValues.Count == 0 ? null : JsonConvert.SerializeObject(NewValues),
+            AffectedColumns = ChangedColumns.Count == 0 ? null : JsonConvert.SerializeObject(ChangedColumns)
         };
         return audit;
     }

src/FlowSynx.Pluginregistry/Components/Pages/Manage/Upload.razor

@@ -2,7 +2,6 @@
 @using FlowSynx.PluginRegistry.Domain.Profile
 @using FlowSynx.Pluginregistry.Services
 @using System.ComponentModel.DataAnnotations
-@using System.Text.Json
 @using Microsoft.AspNetCore.Authorization
 @using Microsoft.AspNetCore.Components.Forms
 @using System.Security.Claims

src/FlowSynx.Pluginregistry/Services/PluginMetadataReader.cs

@@ -1,4 +1,5 @@
 using FlowSynx.Pluginregistry.Models;
+using Newtonsoft.Json;
 using System.Text.Json;
 
 namespace FlowSynx.Pluginregistry.Services;
@@ -13,7 +14,7 @@ public async Task<PluginMetadata> ReadAsync(string path)
             throw new FileNotFoundException("metadata.json not found.");
 
         var content = await File.ReadAllTextAsync(metadataPath);
-        var metadata = JsonSerializer.Deserialize<PluginMetadata>(content);
+        var metadata = JsonConvert.DeserializeObject<PluginMetadata>(content);
 
         if (metadata == null || string.IsNullOrWhiteSpace(metadata.Type) || string.IsNullOrWhiteSpace(metadata.Version))
             throw new InvalidDataException("Invalid or incomplete metadata.json.");