Refactored the setContinuePoint code from the UI to the backend. Now, through an API, we can get the chapter to restart from. (#973)

API/Controllers/ReaderController.cs

@@ -356,6 +356,19 @@ namespace API.Controllers
             return BadRequest("Could not save progress");
         }
 
+        /// <summary>
+        /// Continue point is the chapter which you should start reading again from. If there is no progress on a series, then the first chapter will be returned (non-special unless only specials).
+        /// Otherwise, loop through the chapters and volumes in order to find the next chapter which has progress.
+        /// </summary>
+        /// <returns></returns>
+        [HttpGet("continue-point")]
+        public async Task<ActionResult<ChapterDto>> GetContinuePoint(int seriesId)
+        {
+            var userId = await _unitOfWork.UserRepository.GetUserIdByUsernameAsync(User.GetUsername());
+
+            return Ok(await _readerService.GetContinuePoint(seriesId, userId));
+        }
+
         /// <summary>
         /// Returns a list of bookmarked pages for a given Chapter
         /// </summary>