wasSharpNET – Blame information for rev 29
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8 | office | 1 | /////////////////////////////////////////////////////////////////////////// |
2 | // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // |
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3 | // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // |
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4 | // rights of fair usage, the disclaimer and warranty conditions. // |
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5 | /////////////////////////////////////////////////////////////////////////// |
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6 | |||
7 | using System; |
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8 | using System.Collections; |
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9 | using System.Collections.Generic; |
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10 | using System.Collections.Specialized; |
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11 | using System.Linq; |
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12 | using System.ServiceModel.Syndication; |
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13 | using System.Xml; |
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14 | using wasSharp.Collections.Specialized; |
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15 | using wasSharp.Timers; |
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16 | |||
17 | namespace wasSharpNET.Syndication |
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18 | { |
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19 | /////////////////////////////////////////////////////////////////////////// |
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20 | // Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 // |
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21 | /////////////////////////////////////////////////////////////////////////// |
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22 | /// <summary> |
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23 | /// A Syndication implementation as an Observable collection. |
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24 | /// </summary> |
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25 | public class ObservableSyndication : ICollection<SyndicationItem>, INotifyCollectionChanged |
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26 | { |
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27 | private readonly ObservableDictionary<string, SyndicationItem> syndicationItems = |
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28 | new ObservableDictionary<string, SyndicationItem>(); |
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29 | |||
30 | private readonly Timer syndicationPoll; |
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31 | private TimeSpan _defaultUpdateTime; |
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32 | |||
33 | public ObservableSyndication(string URL, TimeSpan defaultUpdateTime) |
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34 | { |
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35 | // Assign update variables. |
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36 | _defaultUpdateTime = defaultUpdateTime; |
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37 | |||
38 | // Forward the collection change event. |
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39 | syndicationItems.CollectionChanged += (o, p) => { CollectionChanged?.Invoke(this, p); }; |
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40 | |||
41 | // Poll the feed. |
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42 | syndicationPoll = new Timer(() => |
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43 | { |
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44 | using (var reader = XmlReader.Create(URL)) |
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45 | { |
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46 | SyndicationFeed.Load(reader)? |
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47 | .Items |
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48 | .AsParallel() |
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49 | .Where(o => o.PublishDate.CompareTo( |
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27 | office | 50 | DateTimeOffset.UtcNow.Subtract(TimeSpan.FromDays(30)) |
51 | .Subtract(defaultUpdateTime)) > 0) |
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8 | office | 52 | .ForAll(o => |
53 | { |
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54 | if (!syndicationItems.ContainsKey(o.Id)) |
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55 | syndicationItems.Add(o.Id, o); |
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56 | }); |
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57 | } |
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58 | }, defaultUpdateTime, defaultUpdateTime); |
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59 | } |
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60 | |||
61 | public ObservableSyndication(string URL, uint milliseconds) : this(URL, TimeSpan.FromMilliseconds(milliseconds)) |
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62 | { |
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63 | } |
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64 | |||
65 | public TimeSpan Refresh |
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66 | { |
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67 | get { return _defaultUpdateTime; } |
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68 | set |
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69 | { |
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70 | _defaultUpdateTime = value; |
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71 | syndicationPoll.Change(_defaultUpdateTime, _defaultUpdateTime); |
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72 | } |
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73 | } |
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74 | |||
29 | office | 75 | public int Count => syndicationItems.Count(); |
8 | office | 76 | |
77 | public bool IsReadOnly => false; |
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78 | |||
79 | public void Add(SyndicationItem item) |
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80 | { |
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81 | syndicationItems.Add(item.Id, item); |
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82 | } |
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83 | |||
84 | public void Clear() |
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85 | { |
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86 | syndicationItems.Clear(); |
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87 | } |
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88 | |||
89 | public bool Contains(SyndicationItem item) |
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90 | { |
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91 | return syndicationItems.ContainsKey(item.Id) && syndicationItems[item.Id].Equals(item); |
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92 | } |
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93 | |||
94 | public void CopyTo(SyndicationItem[] array, int arrayIndex) |
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95 | { |
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96 | syndicationItems.Values.CopyTo(array, arrayIndex); |
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97 | } |
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98 | |||
99 | public bool Remove(SyndicationItem item) |
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100 | { |
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101 | return syndicationItems.Remove(item.Id); |
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102 | } |
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103 | |||
104 | public IEnumerator<SyndicationItem> GetEnumerator() |
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105 | { |
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106 | return syndicationItems.Values.GetEnumerator(); |
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107 | } |
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108 | |||
109 | IEnumerator IEnumerable.GetEnumerator() |
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110 | { |
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111 | return syndicationItems.GetEnumerator(); |
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112 | } |
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113 | |||
114 | public event NotifyCollectionChangedEventHandler CollectionChanged; |
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115 | } |
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27 | office | 116 | } |