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SQLVision.Services/Exporters/JsonExporter.cs

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+using Microsoft.Extensions.Logging;
+using SQLVision.Core.Models;
+using System.Data;
+using System.Text.Json;
+
+namespace SQLVision.Services.Exporters;
+
+public class JsonExporter : IExportHandler
+{
+    private readonly ILogger<JsonExporter> _logger;
+    private readonly JsonSerializerOptions _jsonOptions;
+
+    public string FormatName => "JSON";
+
+    public JsonExporter(ILogger<JsonExporter> logger)
+    {
+        _logger = logger;
+        _jsonOptions = new JsonSerializerOptions
+        {
+            WriteIndented = true,
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
+        };
+    }
+
+    public async Task ExportAsync(DataTable data, string filePath, ExportOptions options)
+    {
+        var records = ConvertDataTableToList(data);
+        var json = JsonSerializer.Serialize(records, _jsonOptions);
+        await File.WriteAllTextAsync(filePath, json);
+
+        _logger.LogInformation("Exported {Rows} rows to JSON: {FilePath}", data.Rows.Count, filePath);
+    }
+
+    public async Task<byte[]> ExportToMemoryAsync(DataTable data, ExportOptions options)
+    {
+        var records = ConvertDataTableToList(data);
+        var json = JsonSerializer.Serialize(records, _jsonOptions);
+        return System.Text.Encoding.UTF8.GetBytes(json);
+    }
+
+    private List<Dictionary<string, object>> ConvertDataTableToList(DataTable data)
+    {
+        var list = new List<Dictionary<string, object>>();
+
+        foreach (DataRow row in data.Rows)
+        {
+            var dict = new Dictionary<string, object>();
+
+            foreach (DataColumn column in data.Columns)
+            {
+                dict[column.ColumnName] = row[column] ?? DBNull.Value;
+            }
+
+            list.Add(dict);
+        }
+
+        return list;
+    }
+}