feat-visualization (#33)

尽管里面有点粪，但还是生成了漂亮的树，就当给树施肥了
剩下一个小问题：未考虑节点的宽度（因为名称不一样长），但目前未发现对图生成的明显影响

Co-authored-by: jackfiled <xcrenchangjun@outlook.com>
Reviewed-on: PostGuard/Canon#33
Co-authored-by: Ichirinko <1621543655@qq.com>
Co-committed-by: Ichirinko <1621543655@qq.com>

Canon.Server/Controllers/CompilerController.cs

@@ -0,0 +1,33 @@
+using Canon.Server.Models;
+using Canon.Server.Services;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+
+namespace Canon.Server.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class CompilerController(CompileDbContext dbContext, CompilerService compilerService) : ControllerBase
+{
+    [HttpGet("{compileId}")]
+    public async Task<ActionResult<CompileResponse>> GetResponse(string compileId)
+    {
+        CompileResult? result = await dbContext.CompileResults
+            .Where(r => r.CompileId == compileId)
+            .FirstOrDefaultAsync();
+
+        if (result is null)
+        {
+            return NotFound();
+        }
+
+        return Ok(result);
+    }
+
+    [HttpPost]
+    public async Task<ActionResult<CompileResponse>> Compile(SourceCode sourceCode)
+    {
+        CompileResponse response = await compilerService.Compile(sourceCode);
+        return Ok(response);
+    }
+}

Canon.Server/Controllers/FileController.cs

@@ -0,0 +1,24 @@
+using Canon.Server.Services;
+using Microsoft.AspNetCore.Mvc;
+using MongoDB.Driver.GridFS;
+
+namespace Canon.Server.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class FileController(GridFsService gridFsService) : ControllerBase
+{
+    [HttpGet("{filename}")]
+    public async Task<ActionResult> DownloadFile(string filename)
+    {
+        GridFSFileInfo? fileInfo = await gridFsService.FindAsync(filename);
+
+        if (fileInfo is null)
+        {
+            return NotFound();
+        }
+
+        Stream fileStream = await gridFsService.OpenReadStream(fileInfo.Id);
+        return File(fileStream, fileInfo.Metadata["content-type"].AsString);
+    }
+}