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using Microsoft.EntityFrameworkCore;
using System;
using System.Linq;
using System.Threading.Tasks;
using Timeline.Entities;
namespace Timeline.Services.Api
{
public class SearchService : ISearchService
{
private readonly DatabaseContext _database;
public SearchService(DatabaseContext database)
{
_database = database;
}
public async Task<SearchResult<TimelineEntity>> SearchTimelineAsync(string query)
{
if (query is null)
throw new ArgumentNullException(nameof(query));
if (query.Length == 0)
throw new ArgumentException("Query string can't be empty.", nameof(query));
var nameLikeTimelines = await _database.Timelines.Include(t => t.Owner).Where(t => t.Name == null ? t.Owner.Username.Contains(query) : t.Name.Contains(query)).ToListAsync();
var titleLikeTimelines = await _database.Timelines.Where(t => t.Title != null && t.Title.Contains(query)).ToListAsync();
var searchResult = new SearchResult<TimelineEntity>();
searchResult.Items.AddRange(nameLikeTimelines.Select(t => new SearchResultItem<TimelineEntity>(t, 2)));
searchResult.Items.AddRange(titleLikeTimelines.Select(t => new SearchResultItem<TimelineEntity>(t, 1)));
return searchResult;
}
public async Task<SearchResult<UserEntity>> SearchUserAsync(string query)
{
if (query is null)
throw new ArgumentNullException(nameof(query));
if (query.Length == 0)
throw new ArgumentException("Query string can't be empty.", nameof(query));
var usernameLikeUsers = await _database.Users.Where(u => u.Username.Contains(query)).ToListAsync();
var nicknameLikeUsers = await _database.Users.Where(u => u.Nickname != null && u.Nickname.Contains(query)).ToListAsync();
var searchResult = new SearchResult<UserEntity>();
searchResult.Items.AddRange(usernameLikeUsers.Select(u => new SearchResultItem<UserEntity>(u, 2)));
searchResult.Items.AddRange(nicknameLikeUsers.Select(u => new SearchResultItem<UserEntity>(u, 1)));
return searchResult;
}
}
}
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