feat: image deletion endpoint

handles image deletion from disk as well, if a file is sourced locally

Controllers/UserContentController.cs

@@ -37,7 +37,7 @@ public class UserContentController : ControllerBase
     /// Requires authorization with a JWT, has CORS set.
     /// </remarks>
     /// <response code="200">Returned on valid request</response>
-    [HttpGet]
+    [HttpGet("images")]
     [Authorize]
     [EnableCors]
     [ProducesResponseType(typeof(List<Image>), 200)]
@@ -66,7 +66,7 @@ public class UserContentController : ControllerBase
     /// <response code="400">Returned when request does not contain a file or the file is blank</response>
     /// <response code="413">Returned when image size is too large</response>
     /// <response code="415">Returned when file extension/mimetype is unknown</response>
-    [HttpPost]
+    [HttpPost("images")]
     [Authorize]
     [EnableCors]
     [ProducesResponseType(200)]
@@ -149,5 +149,52 @@ public class UserContentController : ControllerBase
         });
     }
 
+    // DELETE /api/v1/uc/images/{id}
+    /// <summary>
+    /// [AUTHED] Delete an image
+    /// </summary>
+    /// <remarks>
+    /// Deletes an image, granted it exists. <br/>
+    /// <b>Note</b>:
+    /// If the image is a file on disk, it's also deleted.
+    /// </remarks>
+    /// <returns>Json with status</returns>
+    /// <param name="id">Image id which will be deleted</param>
+    /// <response code="200">Returned on valid request</response>
+    /// <response code="404">Returned when no such image exists</response>
+    [HttpDelete("images/{id}")]
+    [Authorize]
+    [EnableCors]
+    [ProducesResponseType(200)]
+    [ProducesResponseType(typeof(ErrorDTO), 404)]
+    public async Task<IActionResult> DeleteImage(int id)
+    {
+        // (Attempt to) find the image
+        Image? image = await _db.Images
+                            .FirstOrDefaultAsync(q => q.Id == id);
+        // Failed?
+        if (image == null)
+            return NotFound(new { status = "error", error_msg = "Image not found" });
+
+        // If succeded, remove the image:
+        // - from disk - if saved locally
+        if (!string.IsNullOrEmpty(image.Url)) {
+            if (image.Url.StartsWith("/uploads/images/")) {
+                // delete from disk
+                int fileNameStart = image.Url.LastIndexOf('/');
+                string uniqueFileName = image.Url.Substring(fileNameStart + 1);
+                string absolutePath = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "uploads", "images", uniqueFileName);
+                System.IO.File.Delete(absolutePath);
+            }
+        }
+
+        // - from db
+        _db.Images.Remove(image);
+        await _db.SaveChangesAsync();
+
+        // Return ok
+        return Ok(new { Status = "ok" });
+    }
+
 }