Refactored Volume to have Name and Number (int) so that we can properly sort and still handle possible split volumes.

Refactored ScanLibrary into Library controller and updated it so it adds the new library to all admins.

API/Controllers/LibraryController.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
 using API.DTOs;
 using API.Entities;
@@ -35,6 +36,47 @@ namespace API.Controllers
             _taskScheduler = taskScheduler;
             _seriesRepository = seriesRepository;
         }
+        
+        /// <summary>
+        /// Creates a new Library. Upon library creation, adds new library to all Admin accounts.
+        /// </summary>
+        /// <param name="createLibraryDto"></param>
+        /// <returns></returns>
+        [Authorize(Policy = "RequireAdminRole")]
+        [HttpPost("create")]
+        public async Task<ActionResult> AddLibrary(CreateLibraryDto createLibraryDto)
+        {
+            if (await _libraryRepository.LibraryExists(createLibraryDto.Name))
+            {
+                return BadRequest("Library name already exists. Please choose a unique name to the server.");
+            }
+
+            var admins = (await _userRepository.GetAdminUsersAsync()).ToList();
+            
+            var library = new Library
+            {
+                Name = createLibraryDto.Name,
+                Type = createLibraryDto.Type,
+                AppUsers = admins,
+                Folders = createLibraryDto.Folders.Select(x => new FolderPath {Path = x}).ToList()
+            };
+
+            foreach (var admin in admins)
+            {
+                // If user is null, then set it
+                admin.Libraries ??= new List<Library>();
+                admin.Libraries.Add(library);
+            }
+
+
+            if (await _userRepository.SaveAllAsync())
+            {   
+                //TODO: Enqueue scan library task
+                return Ok();
+            }
+            
+            return BadRequest("There was a critical issue. Please try again.");
+        }
 
         /// <summary>
         /// Returns a list of directories for a given path. If path is empty, returns root drives.
@@ -92,6 +134,7 @@ namespace API.Controllers
             
             // We have to send a json encoded Library (aka a DTO) to the Background Job thread. 
             // Because we use EF, we have circular dependencies back to Library and it will crap out
+            // TODO: Refactor this to use libraryId and move Library call in method.
             BackgroundJob.Enqueue(() => _directoryService.ScanLibrary(library));
             return Ok();
         }
@@ -106,7 +149,6 @@ namespace API.Controllers
         public async Task<ActionResult<IEnumerable<Series>>> GetSeriesForLibrary(int libraryId)
         {
             return Ok(await _seriesRepository.GetSeriesForLibraryIdAsync(libraryId));
-
         }
     }
 }