added server storage

BetterIServ.Backend/Controllers/StorageController.cs

@@ -0,0 +1,42 @@
+using System.Dynamic;
+using System.Text;
+using BetterIServ.Backend.Entities;
+using Microsoft.AspNetCore.Mvc;
+using Newtonsoft.Json;
+
+namespace BetterIServ.Backend.Controllers; 
+
+[ApiController]
+[Route("storage")]
+public class StorageController : ControllerBase {
+
+    [HttpPost]
+    public async Task<IActionResult> SetItem([FromQuery] string item, [FromQuery] string user) {
+        var data = await new StreamReader(Request.Body).ReadToEndAsync();
+        var file = new FileInfo($"/data/{user}/{item}.json");
+        
+        if (file.Directory?.Exists != true) file.Directory?.Create();
+
+        await using var stream = file.Exists ? file.OpenWrite() : file.Create();
+        await stream.WriteAsync(Encoding.UTF8.GetBytes(data));
+        return Ok();
+    }
+
+    [HttpGet]
+    public async Task<ActionResult<SingleResult<dynamic>>> GetItem([FromQuery] string item, [FromQuery] string user) {
+        var file = new FileInfo($"/data/{user}/{item}.json");
+        if (!file.Exists) return NotFound();
+
+        await using var stream = file.OpenRead();
+        var data = await new StreamReader(stream).ReadToEndAsync();
+        return Ok(new SingleResult<string>{Value = data});
+    }
+
+    [HttpDelete]
+    public IActionResult Clear([FromQuery] string user) {
+        if (!Directory.Exists($"/data/{user}")) return NotFound();
+        Directory.Delete($"/data/{user}", true);
+        return Ok();
+    }
+
+}