From 35f54779f0b82f657d728e81c20eaad9d3e208ef Mon Sep 17 00:00:00 2001
From: Michael Bucari-Tovo <mbucari1@gmail.com>
Date: Mon, 9 Aug 2021 01:08:00 -0600
Subject: [PATCH] Add library command to get books removed from library.

---
 ApplicationServices/LibraryCommands.cs | 53 +++++++++++++++++++++++++-
 InternalUtilities/AudibleApiActions.cs |  8 ++--
 2 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/ApplicationServices/LibraryCommands.cs b/ApplicationServices/LibraryCommands.cs
index 97bdae3e..4672b942 100644
--- a/ApplicationServices/LibraryCommands.cs
+++ b/ApplicationServices/LibraryCommands.cs
@@ -20,6 +20,57 @@ namespace ApplicationServices
 
 	public static class LibraryCommands
 	{
+		private static LibraryOptions.ResponseGroupOptions LibraryResponseGroups = LibraryOptions.ResponseGroupOptions.ALL_OPTIONS;
+
+		public static async Task<List<LibraryBook>> FindInactiveBooks(Func<Account, ILoginCallback> loginCallbackFactoryFunc, List<LibraryBook> existingLibrary, params Account[] accounts)
+        {
+			//These are the minimum response groups required for the
+			//library scanner to pass all validation and filtering.
+			LibraryResponseGroups = 
+				LibraryOptions.ResponseGroupOptions.ProductAttrs |
+				LibraryOptions.ResponseGroupOptions.ProductDesc | 
+				LibraryOptions.ResponseGroupOptions.Relationships;
+
+			if (accounts is null || accounts.Length == 0)
+				return new List<LibraryBook>();
+
+			try
+			{
+				var libraryItems = await scanAccountsAsync(loginCallbackFactoryFunc, accounts);
+				Log.Logger.Information($"GetAllLibraryItems: Total count {libraryItems.Count}");
+
+				var missingBookList = existingLibrary.Where(b => libraryItems.Count(i => i.DtoItem.Asin == b.Book.AudibleProductId) == 0).ToList();
+
+				return missingBookList;
+			}
+			catch (AudibleApi.Authentication.LoginFailedException lfEx)
+			{
+				lfEx.SaveFiles(FileManager.Configuration.Instance.LibationFiles);
+
+				// nuget Serilog.Exceptions would automatically log custom properties
+				//   However, it comes with a scary warning when used with EntityFrameworkCore which I'm not yet ready to implement:
+				//   https://github.com/RehanSaeed/Serilog.Exceptions
+				// work-around: use 3rd param. don't just put exception object in 3rd param -- info overload: stack trace, etc
+				Log.Logger.Error(lfEx, "Error scanning library. Login failed. {@DebugInfo}", new
+				{
+					lfEx.RequestUrl,
+					ResponseStatusCodeNumber = (int)lfEx.ResponseStatusCode,
+					ResponseStatusCodeDesc = lfEx.ResponseStatusCode,
+					lfEx.ResponseInputFields,
+					lfEx.ResponseBodyFilePaths
+				});
+				throw;
+			}
+			catch (Exception ex)
+			{
+				Log.Logger.Error(ex, "Error importing library");
+				throw;
+			}
+            finally
+            {
+				LibraryResponseGroups = LibraryOptions.ResponseGroupOptions.ALL_OPTIONS;
+            }
+		}
 		#region FULL LIBRARY scan and import
 		public static async Task<(int totalCount, int newCount)> ImportAccountAsync(Func<Account, ILoginCallback> loginCallbackFactoryFunc, params Account[] accounts)
 		{
@@ -95,7 +146,7 @@ namespace ApplicationServices
 				Account = account?.MaskedLogEntry ?? "[null]"
 			});
 
-			var dtoItems = await AudibleApiActions.GetLibraryValidatedAsync(api);
+			var dtoItems = await AudibleApiActions.GetLibraryValidatedAsync(api, LibraryResponseGroups);
 			return dtoItems.Select(d => new ImportItem { DtoItem = d, AccountId = account.AccountId, LocaleName = account.Locale?.Name }).ToList();
 		}
 
diff --git a/InternalUtilities/AudibleApiActions.cs b/InternalUtilities/AudibleApiActions.cs
index 9cbe58ee..0d1e2edd 100644
--- a/InternalUtilities/AudibleApiActions.cs
+++ b/InternalUtilities/AudibleApiActions.cs
@@ -47,18 +47,18 @@ namespace InternalUtilities
 			// 2 retries == 3 total
 			.RetryAsync(2);
 
-		public static Task<List<Item>> GetLibraryValidatedAsync(Api api)
+		public static Task<List<Item>> GetLibraryValidatedAsync(Api api, LibraryOptions.ResponseGroupOptions responseGroups = LibraryOptions.ResponseGroupOptions.ALL_OPTIONS)
 		{
 			// bug on audible's side. the 1st time after a long absence, a query to get library will return without titles or authors. a subsequent identical query will be successful. this is true whether or tokens are refreshed
 			// worse, this 1st dummy call doesn't seem to help:
 			//    var page = await api.GetLibraryAsync(new AudibleApi.LibraryOptions { NumberOfResultPerPage = 1, PageNumber = 1, PurchasedAfter = DateTime.Now.AddYears(-20), ResponseGroups = AudibleApi.LibraryOptions.ResponseGroupOptions.ALL_OPTIONS });
 			// i don't want to incur the cost of making a full dummy call every time because it fails sometimes
-			return policy.ExecuteAsync(() => getItemsAsync(api));
+			return policy.ExecuteAsync(() => getItemsAsync(api, responseGroups));
 		}
 
-		private static async Task<List<Item>> getItemsAsync(Api api)
+		private static async Task<List<Item>> getItemsAsync(Api api, LibraryOptions.ResponseGroupOptions responseGroups)
 		{
-			var items = await api.GetAllLibraryItemsAsync();
+			var items = await api.GetAllLibraryItemsAsync(responseGroups);
 
 			// remove episode parents
 			items.RemoveAll(i => i.IsEpisodes);