diff options
Diffstat (limited to 'BackEnd/Timeline/Services/BookmarkTimelineService.cs')
| -rw-r--r-- | BackEnd/Timeline/Services/BookmarkTimelineService.cs | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/BackEnd/Timeline/Services/BookmarkTimelineService.cs b/BackEnd/Timeline/Services/BookmarkTimelineService.cs deleted file mode 100644 index 4930686e..00000000 --- a/BackEnd/Timeline/Services/BookmarkTimelineService.cs +++ /dev/null @@ -1,204 +0,0 @@ -using Microsoft.EntityFrameworkCore;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Timeline.Entities;
-using Timeline.Services.Exceptions;
-
-namespace Timeline.Services
-{
-
- [Serializable]
- public class InvalidBookmarkException : Exception
- {
- public InvalidBookmarkException() { }
- public InvalidBookmarkException(string message) : base(message) { }
- public InvalidBookmarkException(string message, Exception inner) : base(message, inner) { }
- protected InvalidBookmarkException(
- System.Runtime.Serialization.SerializationInfo info,
- System.Runtime.Serialization.StreamingContext context) : base(info, context) { }
- }
-
- /// <summary>
- /// Service interface that manages timeline bookmarks.
- /// </summary>
- public interface IBookmarkTimelineService
- {
- /// <summary>
- /// Get bookmarks of a user.
- /// </summary>
- /// <param name="userId">User id of bookmark owner.</param>
- /// <returns>Id of Bookmark timelines in order.</returns>
- /// <exception cref="UserNotExistException">Thrown when user does not exist.</exception>
- Task<List<long>> GetBookmarks(long userId);
-
- /// <summary>
- /// Check if a timeline is a bookmark.
- /// </summary>
- /// <param name="userId">The user id.</param>
- /// <param name="timelineId">Timeline id.</param>
- /// <param name="checkUserExistence">If true it will throw when user does not exist.</param>
- /// <param name="checkTimelineExistence">If true it will throw when timeline does not exist.</param>
- /// <returns>True if timeline is a bookmark. Otherwise false.</returns>
- /// <exception cref="UserNotExistException">Throw if user does not exist and <paramref name="checkUserExistence"/> is true.</exception>
- /// <exception cref="TimelineNotExistException">Thrown if timeline does not exist and <paramref name="checkTimelineExistence"/> is true.</exception>
- Task<bool> IsBookmark(long userId, long timelineId, bool checkUserExistence = true, bool checkTimelineExistence = true);
-
- /// <summary>
- /// Add a bookmark to tail to a user.
- /// </summary>
- /// <param name="userId">User id of bookmark owner.</param>
- /// <param name="timelineId">Timeline id.</param>
- /// <returns>True if timeline is added to bookmark. False if it already is.</returns>
- /// <exception cref="UserNotExistException">Thrown when user does not exist.</exception>
- /// <exception cref="TimelineNotExistException">Thrown when timeline does not exist.</exception>
- Task<bool> AddBookmark(long userId, long timelineId);
-
- /// <summary>
- /// Remove a bookmark from a user.
- /// </summary>
- /// <param name="userId">User id of bookmark owner.</param>
- /// <param name="timelineId">Timeline id.</param>
- /// <returns>True if deletion is performed. False if bookmark does not exist.</returns>
- /// <exception cref="UserNotExistException">Thrown when user does not exist.</exception>
- /// <exception cref="TimelineNotExistException">Thrown when timeline does not exist.</exception>
- Task<bool> RemoveBookmark(long userId, long timelineId);
-
- /// <summary>
- /// Move bookmark to a new position.
- /// </summary>
- /// <param name="userId">User id of bookmark owner.</param>
- /// <param name="timelineId">Timeline name.</param>
- /// <param name="newPosition">New position. Starts at 1.</param>
- /// <exception cref="UserNotExistException">Thrown when user does not exist.</exception>
- /// <exception cref="TimelineNotExistException">Thrown when timeline does not exist.</exception>
- /// <exception cref="InvalidBookmarkException">Thrown when the timeline is not a bookmark.</exception>
- Task MoveBookmark(long userId, long timelineId, long newPosition);
- }
-
- public class BookmarkTimelineService : IBookmarkTimelineService
- {
- private readonly DatabaseContext _database;
- private readonly IBasicUserService _userService;
- private readonly IBasicTimelineService _timelineService;
-
- public BookmarkTimelineService(DatabaseContext database, IBasicUserService userService, IBasicTimelineService timelineService)
- {
- _database = database;
- _userService = userService;
- _timelineService = timelineService;
- }
-
- public async Task<bool> AddBookmark(long userId, long timelineId)
- {
- if (!await _userService.CheckUserExistence(userId))
- throw new UserNotExistException(userId);
-
- if (!await _timelineService.CheckExistence(timelineId))
- throw new TimelineNotExistException(timelineId);
-
- if (await _database.BookmarkTimelines.AnyAsync(t => t.TimelineId == timelineId && t.UserId == userId))
- return false;
-
- _database.BookmarkTimelines.Add(new BookmarkTimelineEntity
- {
- TimelineId = timelineId,
- UserId = userId,
- Rank = (await _database.BookmarkTimelines.CountAsync(t => t.UserId == userId)) + 1
- });
-
- await _database.SaveChangesAsync();
- return true;
- }
-
- public async Task<List<long>> GetBookmarks(long userId)
- {
- if (!await _userService.CheckUserExistence(userId))
- throw new UserNotExistException(userId);
-
- var entities = await _database.BookmarkTimelines.Where(t => t.UserId == userId).OrderBy(t => t.Rank).Select(t => new { t.TimelineId }).ToListAsync();
-
- return entities.Select(e => e.TimelineId).ToList();
- }
-
- public async Task<bool> IsBookmark(long userId, long timelineId, bool checkUserExistence = true, bool checkTimelineExistence = true)
- {
- if (checkUserExistence && !await _userService.CheckUserExistence(userId))
- throw new UserNotExistException(userId);
-
- if (checkTimelineExistence && !await _timelineService.CheckExistence(timelineId))
- throw new TimelineNotExistException(timelineId);
-
- return await _database.BookmarkTimelines.AnyAsync(b => b.TimelineId == timelineId && b.UserId == userId);
- }
-
- public async Task MoveBookmark(long userId, long timelineId, long newPosition)
- {
- if (!await _userService.CheckUserExistence(userId))
- throw new UserNotExistException(userId);
-
- if (!await _timelineService.CheckExistence(timelineId))
- throw new TimelineNotExistException(timelineId);
-
- var entity = await _database.BookmarkTimelines.SingleOrDefaultAsync(t => t.TimelineId == timelineId && t.UserId == userId);
-
- if (entity == null) throw new InvalidBookmarkException("You can't move a non-bookmark timeline.");
-
- var oldPosition = entity.Rank;
-
- if (newPosition < 1)
- {
- newPosition = 1;
- }
- else
- {
- var totalCount = await _database.BookmarkTimelines.CountAsync(t => t.UserId == userId);
- if (newPosition > totalCount) newPosition = totalCount;
- }
-
- if (oldPosition == newPosition) return;
-
- await using var transaction = await _database.Database.BeginTransactionAsync();
-
- if (newPosition > oldPosition)
- {
- await _database.Database.ExecuteSqlRawAsync("UPDATE `bookmark_timelines` SET `rank` = `rank` - 1 WHERE `rank` BETWEEN {0} AND {1} AND `user` = {2}", oldPosition + 1, newPosition, userId);
- await _database.Database.ExecuteSqlRawAsync("UPDATE `bookmark_timelines` SET `rank` = {0} WHERE `id` = {1}", newPosition, entity.Id);
- }
- else
- {
- await _database.Database.ExecuteSqlRawAsync("UPDATE `bookmark_timelines` SET `rank` = `rank` + 1 WHERE `rank` BETWEEN {0} AND {1} AND `user` = {2}", newPosition, oldPosition - 1, userId);
- await _database.Database.ExecuteSqlRawAsync("UPDATE `bookmark_timelines` SET `rank` = {0} WHERE `id` = {1}", newPosition, entity.Id);
- }
-
- await transaction.CommitAsync();
- }
-
- public async Task<bool> RemoveBookmark(long userId, long timelineId)
- {
- if (!await _userService.CheckUserExistence(userId))
- throw new UserNotExistException(userId);
-
- if (!await _timelineService.CheckExistence(timelineId))
- throw new TimelineNotExistException(timelineId);
-
- var entity = await _database.BookmarkTimelines.SingleOrDefaultAsync(t => t.UserId == userId && t.TimelineId == timelineId);
-
- if (entity == null) return false;
-
- await using var transaction = await _database.Database.BeginTransactionAsync();
-
- var rank = entity.Rank;
-
- _database.BookmarkTimelines.Remove(entity);
- await _database.SaveChangesAsync();
-
- await _database.Database.ExecuteSqlRawAsync("UPDATE `bookmark_timelines` SET `rank` = `rank` - 1 WHERE `rank` > {0}", rank);
-
- await transaction.CommitAsync();
-
- return true;
- }
- }
-}
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