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using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;
using Timeline.Controllers;
using Timeline.Entities;
using Timeline.Models.Http;
using Timeline.Services;
namespace Timeline.Models.Mapper
{
public class TimelineMapper
{
private readonly DatabaseContext _database;
private readonly UserMapper _userMapper;
public TimelineMapper(DatabaseContext database, UserMapper userMapper)
{
_database = database;
_userMapper = userMapper;
}
public async Task<HttpTimeline> MapToHttp(TimelineEntity entity, IUrlHelper urlHelper)
{
await _database.Entry(entity).Reference(e => e.Owner).LoadAsync();
await _database.Entry(entity).Collection(e => e.Members).Query().Include(m => m.User).LoadAsync();
var timelineName = entity.Name is null ? "@" + entity.Owner.Username : entity.Name;
return new HttpTimeline(
uniqueId: entity.UniqueId,
title: string.IsNullOrEmpty(entity.Title) ? timelineName : entity.Title,
name: timelineName,
nameLastModifed: entity.NameLastModified,
description: entity.Description ?? "",
owner: await _userMapper.MapToHttp(entity.Owner, urlHelper),
visibility: entity.Visibility,
members: await _userMapper.MapToHttp(entity.Members.Select(m => m.User).ToList(), urlHelper),
createTime: entity.CreateTime,
lastModified: entity.LastModified,
links: new HttpTimelineLinks(
self: urlHelper.ActionLink(nameof(TimelineController.TimelineGet), nameof(TimelineController)[0..^nameof(Controller).Length], new { timeline = timelineName }),
posts: urlHelper.ActionLink(nameof(TimelineController.PostListGet), nameof(TimelineController)[0..^nameof(Controller).Length], new { timeline = timelineName })
)
);
}
public async Task<List<HttpTimeline>> MapToHttp(List<TimelineEntity> entities, IUrlHelper urlHelper)
{
var result = new List<HttpTimeline>();
foreach (var entity in entities)
{
result.Add(await MapToHttp(entity, urlHelper));
}
return result;
}
public async Task<HttpTimelinePost> MapToHttp(TimelinePostEntity entity, string timelineName, IUrlHelper urlHelper)
{
HttpTimelinePostContent? content = null;
if (entity.Content != null)
{
content = entity.ContentType switch
{
TimelinePostContentTypes.Text => new HttpTimelinePostContent
(
type: TimelinePostContentTypes.Text,
text: entity.Content,
url: null,
eTag: null
),
TimelinePostContentTypes.Image => new HttpTimelinePostContent
(
type: TimelinePostContentTypes.Image,
text: null,
url: urlHelper.ActionLink(nameof(TimelineController.PostDataGet), nameof(TimelineController)[0..^nameof(Controller).Length], new { timeline = timelineName, post = entity.LocalId }),
eTag: $"\"{entity.Content}\""
),
_ => throw new DatabaseCorruptedException(string.Format(CultureInfo.InvariantCulture, "Unknown timeline post type {0}.", entity.ContentType))
};
}
await _database.Entry(entity).Reference(e => e.Author).LoadAsync();
HttpUser? author = null;
if (entity.Author is not null)
{
author = await _userMapper.MapToHttp(entity.Author, urlHelper);
}
return new HttpTimelinePost(
id: entity.LocalId,
content: content,
deleted: content is null,
time: entity.Time,
author: author,
lastUpdated: entity.LastUpdated
);
}
public async Task<List<HttpTimelinePost>> MapToHttp(List<TimelinePostEntity> entities, string timelineName, IUrlHelper urlHelper)
{
var result = new List<HttpTimelinePost>();
foreach (var entity in entities)
{
result.Add(await MapToHttp(entity, timelineName, urlHelper));
}
return result;
}
}
}
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