Localization - First Pass (#2174)

* Started designing the backend localization service

* Worked in Transloco for initial PoC

* Worked in Transloco for initial PoC

* Translated the login screen

* translated dashboard screen

* Started work on the backend

* Fixed a logic bug

* translated edit-user screen

* Hooked up the backend for having a locale property.

* Hooked up the ability to view the available locales and switch to them.

* Made the localization service languages be derived from what's in langs/ directory.

* Fixed up localization switching

* Switched when we check for a license on UI bootstrap

* Tweaked some code

* Fixed the bug where dashboard wasn't loading and made it so language switching is working.

* Fixed a bug on dashboard with languagePath

* Converted user-scrobble-history.component.html

* Converted spoiler.component.html

* Converted review-series-modal.component.html

* Converted review-card-modal.component.html

* Updated the readme

* Translated using Weblate (English)

Currently translated at 100.0% (54 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/en/

* Converted review-card.component.html

* Deleted dead component

* Converted want-to-read.component.html

* Added translation using Weblate (Korean)

* Translated using Weblate (Spanish)

Currently translated at 40.7% (22 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/es/

* Translated using Weblate (Korean)

Currently translated at 62.9% (34 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/ko/

* Converted user-preferences.component.html

* Translated using Weblate (Korean)

Currently translated at 92.5% (50 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/ko/

* Converted user-holds.component.html

* Converted theme-manager.component.html

* Converted restriction-selector.component.html

* Converted manage-devices.component.html

* Converted edit-device.component.html

* Converted change-password.component.html

* Converted change-email.component.html

* Converted change-age-restriction.component.html

* Converted api-key.component.html

* Converted anilist-key.component.html

* Converted typeahead.component.html

* Converted user-stats-info-cards.component.html

* Converted user-stats.component.html

* Converted top-readers.component.html

* Converted some pipes and ensure translation is loaded before the app.

* Finished all but one pipe for localization

* Converted directory-picker.component.html

* Converted library-access-modal.component.html

* Converted a few components

* Converted a few components

* Converted a few components

* Converted a few components

* Converted a few components

* Merged weblate in

* ... -> … update

* Updated the readme

* Updateded all fonts to be woff2

* Cleaned up some strings to increase re-use

* Removed an old flow (that doesn't exist in backend any longer) from when we introduced emails on Kavita.

* Converted Series detail

* Lots more converted

* Lots more converted & hooked up the ability to flatten during prod build the language files.

* Lots more converted

* Lots more converted & fixed a bunch of broken pipes due to inject()

* Lots more converted

* Lots more converted

* Lots more converted & fixed some bad keys

* Lots more converted

* Fixed some bugs with admin dasbhoard nested tabs not rendering on first load due to not using onpush change detection

* Fixed up some localization errors and fixed forgot password error when the user doesn't have change password permission

* Fixed a stupid build issue again

* Started adding errors for interceptor and backend.

* Finished off manga-reader

* More translations

* Few fixes

* Fixed a bug where character tag badges weren't showing the name on chapter info

* All components are translated

* All toasts are translated

* All confirm/alerts are translated

* Trying something new for the backend

* Migrated the localization strings for the backend into a new file.

* Updated the localization service to be able to do backend localization with fallback to english.

* Cleaned up some external reviews code to reduce looping

* Localized AccountController.cs

* 60% done with controllers

* All controllers are done

* All KavitaExceptions are covered

* Some shakeout fixes

* Prep for initial merge

* Everything is done except options and basic shakeout proves response times are good. Unit tests are broken.

* Fixed up the unit tests

* All unit tests are now working

* Removed some quantifier

* I'm not sure I can support localization for some Volume/Chapter/Book strings within the codebase.

---------

Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>
Co-authored-by: majora2007 <kavitareader@gmail.com>
Co-authored-by: expertjun <jtrobin@naver.com>
Co-authored-by: ThePromidius <thepromidiusyt@gmail.com>

API/Data/DataContext.cs

@@ -100,6 +100,10 @@ public sealed class DataContext : IdentityDbContext<AppUser, AppRole, int,
         builder.Entity<AppUserPreferences>()
             .Property(b => b.BookReaderWritingStyle)
             .HasDefaultValue(WritingStyle.Horizontal);
+        builder.Entity<AppUserPreferences>()
+            .Property(b => b.Locale)
+            .IsRequired(true)
+            .HasDefaultValue("en");
 
         builder.Entity<Library>()
             .Property(b => b.AllowScrobbling)

API/Data/Migrations/20230727175518_AddLocaleOnPrefs.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace API.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddLocaleOnPrefs : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "Locale",
+                table: "AppUserPreferences",
+                type: "TEXT",
+                nullable: false,
+                defaultValue: "en");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Locale",
+                table: "AppUserPreferences");
+        }
+    }
+}

API/Data/Migrations/DataContextModelSnapshot.cs

@@ -272,6 +272,12 @@ namespace API.Data.Migrations
                     b.Property<int>("LayoutMode")
                         .HasColumnType("INTEGER");
 
+                    b.Property<string>("Locale")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT")
+                        .HasDefaultValue("en");
+
                     b.Property<bool>("NoTransitions")
                         .HasColumnType("INTEGER");
 

API/Data/Repositories/AppUserProgressRepository.cs

@@ -28,7 +28,7 @@ public interface IAppUserProgressRepository
     Task<IEnumerable<AppUserProgress>> GetUserProgressForSeriesAsync(int seriesId, int userId);
     Task<IEnumerable<AppUserProgress>> GetAllProgress();
     Task<DateTime> GetLatestProgress();
-    Task<ProgressDto> GetUserProgressDtoAsync(int chapterId, int userId);
+    Task<ProgressDto?> GetUserProgressDtoAsync(int chapterId, int userId);
     Task<bool> AnyUserProgressForSeriesAsync(int seriesId, int userId);
     Task<int> GetHighestFullyReadChapterForSeries(int seriesId, int userId);
     Task<int> GetHighestFullyReadVolumeForSeries(int seriesId, int userId);
@@ -143,7 +143,7 @@ public class AppUserProgressRepository : IAppUserProgressRepository
             .FirstOrDefaultAsync();
     }
 
-    public async Task<ProgressDto> GetUserProgressDtoAsync(int chapterId, int userId)
+    public async Task<ProgressDto?> GetUserProgressDtoAsync(int chapterId, int userId)
     {
         return await _context.AppUserProgresses
             .Where(p => p.AppUserId == userId && p.ChapterId == chapterId)

API/Data/Repositories/UserRepository.cs

@@ -73,7 +73,7 @@ public interface IUserRepository
     Task<IEnumerable<AppUserRating>> GetSeriesWithReviews(int userId);
     Task<bool> HasHoldOnSeries(int userId, int seriesId);
     Task<IList<ScrobbleHoldDto>> GetHolds(int userId);
-
+    Task<string> GetLocale(int userId);
 }
 
 public class UserRepository : IUserRepository
@@ -291,6 +291,13 @@ public class UserRepository : IUserRepository
             .ToListAsync();
     }
 
+    public async Task<string> GetLocale(int userId)
+    {
+        return await _context.AppUserPreferences.Where(p => p.AppUserId == userId)
+            .Select(p => p.Locale)
+            .SingleAsync();
+    }
+
     public async Task<IEnumerable<AppUser>> GetAdminUsersAsync()
     {
         return await _userManager.GetUsersInRoleAsync(PolicyConstants.AdminRole);