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Neil Brommer 2021-11-12 19:21:59 -08:00
commit 691e049103
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103
Start/Server/Data/Services/BookmarkService.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security;
using Microsoft.EntityFrameworkCore;
using Start.Server.Data.Services.Interfaces;
using Start.Server.Models;
namespace Start.Server.Data.Services {
public class BookmarkService : IBookmarkService {
private readonly ApplicationDbContext db;
public BookmarkService(ApplicationDbContext dbContext) {
this.db = dbContext;
}
public (BookmarkStatus, Bookmark?) GetBookmark(string userId, int bookmarkId) {
if (!IsBookmarkOwner(userId, bookmarkId))
return (BookmarkStatus.OwnerDoesNotMatch, null);
Bookmark? bookmark = this.db.Bookmarks
.SingleOrDefault(b => b.BookmarkId == bookmarkId);
if (bookmark == null)
return (BookmarkStatus.BookmarkDoesNotExist, null);
return (BookmarkStatus.OK, bookmark);
}
public IList<Bookmark> GetUserBookmarks(string userId) {
return this.db.Bookmarks
.Where(b => b.BookmarkGroup!.BookmarkContainer!.ApplicationUserId == userId)
.ToList();
}
public Bookmark CreateBookmark(string userId, string title, string url, string? notes,
int bookmarkGroupId) {
if (!this.IsBookmarkGroupOwner(userId, bookmarkGroupId))
throw new SecurityException(
"The provided user ID doesn't match the bookmark group owner ID");
Bookmark newBookmark = new(title, url, bookmarkGroupId);
db.Bookmarks.Add(newBookmark);
db.SaveChanges();
return newBookmark;
}
public (BookmarkStatus, Bookmark?) UpdateBookmark(string userId, Bookmark bookmark) {
Bookmark? existingBookmark = db.Bookmarks
.SingleOrDefault(b => b.BookmarkId == bookmark.BookmarkId);
if (existingBookmark == null)
return (BookmarkStatus.BookmarkDoesNotExist, null);
if (!IsBookmarkOwner(userId, bookmark.BookmarkId))
return (BookmarkStatus.OwnerDoesNotMatch, null);
if (!IsBookmarkGroupOwner(userId, bookmark.BookmarkGroupId))
return (BookmarkStatus.OwnerDoesNotMatch, null);
db.Entry(bookmark).State = EntityState.Modified;
db.SaveChanges();
return (BookmarkStatus.OK, bookmark);
}
public BookmarkStatus DeleteBookmark(string userId, int bookmarkId) {
Bookmark? bookmark = db.Bookmarks
.SingleOrDefault(b => b.BookmarkId == bookmarkId);
if (bookmark == null)
return BookmarkStatus.BookmarkDoesNotExist;
if (!IsBookmarkOwner(userId, bookmarkId))
return BookmarkStatus.OwnerDoesNotMatch;
db.Bookmarks.Remove(bookmark);
db.SaveChanges();
return BookmarkStatus.OK;
}
private bool IsBookmarkOwner(string userId, int bookmarkId) {
string? bookmarkOwnerId = this.db.Bookmarks
.Where(b => b.BookmarkId == bookmarkId)
.Select(b => b.BookmarkGroup!.BookmarkContainer!.ApplicationUserId)
.SingleOrDefault();
return userId == bookmarkOwnerId;
}
private bool IsBookmarkGroupOwner(string userId, int bookmarkGroupId) {
string? groupOwnerId = this.db.BookmarkGroups
.Where(bg => bg.BookmarkGroupId == bookmarkGroupId)
.Select(bg => bg.BookmarkContainer!.ApplicationUserId)
.SingleOrDefault();
return userId == groupOwnerId;
}
}
}

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Start/Server/Data/Services/Interfaces/IBookmarkService.cs Normal file
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using System;
using System.Collections.Generic;
using Start.Server.Models;
namespace Start.Server.Data.Services.Interfaces {
public interface IBookmarkService {
public (BookmarkStatus, Bookmark?) GetBookmark(string userId, int bookmarkId);
public IList<Bookmark> GetUserBookmarks(string userId);
public Bookmark CreateBookmark(string userId, string title, string url, string? notes,
int bookmarkGroupId);
public (BookmarkStatus, Bookmark?) UpdateBookmark(string userId, Bookmark bookmark);
public BookmarkStatus DeleteBookmark(string userId, int bookmarkId);
}
public enum BookmarkStatus {
OK = 1,
BookmarkDoesNotExist = 2,
OwnerDoesNotMatch = 3,
UserDoesNotExist = 4
}
}