1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Drawing;
using MediaBrowser.Model.Entities;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Photos
{
public abstract class BaseDynamicImageProvider<T> : IHasChangeMonitor, IForcedProvider, IDynamicImageProvider, IHasOrder
where T : IHasMetadata
{
protected IFileSystem FileSystem { get; private set; }
protected IProviderManager ProviderManager { get; private set; }
protected IApplicationPaths ApplicationPaths { get; private set; }
protected BaseDynamicImageProvider(IFileSystem fileSystem, IProviderManager providerManager, IApplicationPaths applicationPaths)
{
ApplicationPaths = applicationPaths;
ProviderManager = providerManager;
FileSystem = fileSystem;
}
public virtual bool Supports(IHasImages item)
{
return item is T;
}
public IEnumerable<ImageType> GetSupportedImages(IHasImages item)
{
return new List<ImageType>
{
ImageType.Primary,
ImageType.Thumb
};
}
public async Task<DynamicImageResponse> GetImage(IHasImages item, ImageType type, CancellationToken cancellationToken)
{
var items = await GetItemsWithImages(item).ConfigureAwait(false);
var cacheKey = GetConfigurationCacheKey(items);
var result = await FetchAsyncInternal(item, items, type, cacheKey, cancellationToken).ConfigureAwait(false);
return new DynamicImageResponse
{
HasImage = result != null,
Stream = result,
InternalCacheKey = cacheKey,
Format = ImageFormat.Png
};
}
protected abstract Task<List<BaseItem>> GetItemsWithImages(IHasImages item);
private const string Version = "3";
protected string GetConfigurationCacheKey(List<BaseItem> items)
{
return (Version + "_" + string.Join(",", items.Select(i => i.Id.ToString("N")).ToArray())).GetMD5().ToString("N");
}
protected Task<Stream> FetchAsyncInternal(IHasImages item,
List<BaseItem> itemsWithImages,
ImageType imageType,
string cacheKey,
CancellationToken cancellationToken)
{
return CreateImageAsync(item, itemsWithImages, imageType, 0);
}
protected Task<Stream> GetThumbCollage(List<BaseItem> items)
{
var files = items
.Select(i => i.GetImagePath(ImageType.Primary) ?? i.GetImagePath(ImageType.Thumb))
.Where(i => !string.IsNullOrWhiteSpace(i))
.ToList();
return DynamicImageHelpers.GetThumbCollage(files,
FileSystem,
1600,
900,
ApplicationPaths);
}
protected Task<Stream> GetSquareCollage(List<BaseItem> items)
{
var files = items
.Select(i => i.GetImagePath(ImageType.Primary) ?? i.GetImagePath(ImageType.Thumb))
.Where(i => !string.IsNullOrWhiteSpace(i))
.ToList();
return DynamicImageHelpers.GetSquareCollage(files,
FileSystem,
800, ApplicationPaths);
}
public string Name
{
get { return "Dynamic Image Provider"; }
}
public async Task<Stream> CreateImageAsync(IHasImages item,
List<BaseItem> itemsWithImages,
ImageType imageType,
int imageIndex)
{
if (itemsWithImages.Count == 0)
{
return null;
}
return imageType == ImageType.Thumb ?
await GetThumbCollage(itemsWithImages).ConfigureAwait(false) :
await GetSquareCollage(itemsWithImages).ConfigureAwait(false);
}
public bool HasChanged(IHasMetadata item, IDirectoryService directoryService, DateTime date)
{
if (!Supports(item))
{
return false;
}
var items = GetItemsWithImages(item).Result;
var cacheKey = GetConfigurationCacheKey(items);
return HasChanged(item, ImageType.Primary, cacheKey) || HasChanged(item, ImageType.Thumb, cacheKey);
}
protected bool HasChanged(IHasImages item, ImageType type, string cacheKey)
{
var image = item.GetImageInfo(type, 0);
if (image != null)
{
if (!FileSystem.ContainsSubPath(item.GetInternalMetadataPath(), image.Path))
{
return false;
}
var currentPathCacheKey = (Path.GetFileNameWithoutExtension(image.Path) ?? string.Empty).Split('_').LastOrDefault();
if (string.Equals(cacheKey, currentPathCacheKey, StringComparison.OrdinalIgnoreCase))
{
return false;
}
}
return true;
}
protected List<BaseItem> GetFinalItems(List<BaseItem> items)
{
// Rotate the images no more than once per week
var random = new Random(GetWeekOfYear()).Next();
return items
.OrderBy(i => random - items.IndexOf(i))
.Take(4)
.OrderBy(i => i.Name)
.ToList();
}
private int GetWeekOfYear()
{
var usCulture = new CultureInfo("en-US");
var weekNo = usCulture.Calendar.GetWeekOfYear(
DateTime.Now,
usCulture.DateTimeFormat.CalendarWeekRule,
usCulture.DateTimeFormat.FirstDayOfWeek);
return weekNo;
}
public int Order
{
get
{
// Run before the default image provider which will download placeholders
return 0;
}
}
}
}
|
