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
|
#region Disclaimer / License
// Copyright (C) 2015, The Duplicati Team
// http://www.duplicati.com, info@duplicati.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
#endregion
using System;
using System.Collections.Generic;
using System.Text;
namespace Duplicati.Library.Utility
{
/// <summary>
/// Utility class to parse date/time offset strings like duplicity does:
/// http://duplicity.nongnu.org/vers8/duplicity.1.html#sect8
/// </summary>
public static class Timeparser
{
public static TimeSpan ParseTimeSpan(string datestring)
{
DateTime dt = new DateTime(0, DateTimeKind.Local);
return ParseTimeInterval(datestring, dt) - dt;
}
public static DateTime ParseTimeInterval(string datestring, DateTime offset)
{
return ParseTimeInterval(datestring, offset, false);
}
public static DateTime ParseTimeInterval(string datestring, DateTime offset, bool negate)
{
if (offset.Kind == DateTimeKind.Unspecified)
offset = new DateTime(offset.Ticks, DateTimeKind.Local);
int multiplier = negate ? -1 : 1;
if (string.IsNullOrEmpty(datestring))
return offset;
if (String.Equals(datestring.Trim(), "now", StringComparison.OrdinalIgnoreCase))
return DateTime.Now;
long l;
if (long.TryParse(datestring, System.Globalization.NumberStyles.Integer, null, out l))
return offset.AddSeconds(l * multiplier);
DateTime t;
if (DateTime.TryParse(datestring, System.Globalization.CultureInfo.CurrentUICulture, System.Globalization.DateTimeStyles.AssumeLocal, out t))
return t;
if (Library.Utility.Utility.TryDeserializeDateTime(datestring, out t))
return t;
char[] separators = new char[] { 's', 'm', 'h', 'D', 'W', 'M', 'Y' };
int index = 0;
int previndex = 0;
while ((index = datestring.IndexOfAny(separators, previndex)) > 0)
{
string partial = datestring.Substring(previndex, index - previndex).Trim();
int factor;
if (!int.TryParse(partial, System.Globalization.NumberStyles.Integer, null, out factor))
throw new Exception(Strings.Timeparser.InvalidIntegerError(partial));
factor *= multiplier;
switch (datestring[index])
{
case 's':
offset = offset.AddSeconds(factor);
break;
case 'm':
offset = offset.AddMinutes(factor);
break;
case 'h':
offset = offset.AddHours(factor);
break;
case 'D':
offset = offset.AddDays(factor);
break;
case 'W':
offset = offset.AddDays(factor * 7);
break;
case 'M':
offset = offset.AddMonths(factor);
break;
case 'Y':
offset = offset.AddYears(factor);
break;
default:
throw new Exception(Strings.Timeparser.InvalidSpecifierError(datestring[index]));
}
previndex = index + 1;
}
if (datestring.Substring(previndex).Trim().Length > 0)
throw new Exception(Strings.Timeparser.UnparsedDataFragmentError(datestring.Substring(previndex)));
return offset;
}
}
}
|
