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// SparkleShare, a collaboration and sharing tool.
// Copyright (C) 2010 Hylke Bons <hylkebons@gmail.com>
//
// This program 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 3 of the
// License, or (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace SparkleLib {
public static class Extensions {
public static string Combine (this string [] parts)
{
string new_path = "";
foreach (string part in parts)
new_path = Path.Combine (new_path, part);
return new_path;
}
public static string SHA1 (this string s)
{
SHA1 sha1 = new SHA1CryptoServiceProvider ();
byte [] bytes = ASCIIEncoding.Default.GetBytes (s);
byte [] sha1_bytes = sha1.ComputeHash (bytes);
return BitConverter.ToString (sha1_bytes).ToLower ().Replace ("-", "");
}
public static string SHA256 (this string s)
{
SHA256 sha256 = new SHA256CryptoServiceProvider ();
byte [] bytes = ASCIIEncoding.Default.GetBytes (s);
byte [] sha256_bytes = sha256.ComputeHash (bytes);
return BitConverter.ToString (sha256_bytes).ToLower ().Replace ("-", "");
}
public static string SHA256 (this string s, string salt)
{
SHA256 sha256 = new SHA256CryptoServiceProvider ();
byte [] bytes = ASCIIEncoding.Default.GetBytes (s + salt);
byte [] sha256_bytes = sha256.ComputeHash (bytes);
return BitConverter.ToString (sha256_bytes).ToLower ().Replace ("-", "");
}
public static string MD5 (this string s)
{
MD5 md5 = new MD5CryptoServiceProvider ();
byte [] bytes = ASCIIEncoding.Default.GetBytes (s);
byte [] md5_bytes = md5.ComputeHash (bytes);
return BitConverter.ToString (md5_bytes).ToLower ().Replace ("-", "");
}
// Format a file size nicely with small caps.
// Example: 1048576 becomes "1 ᴍʙ"
public static string ToSize (this double byte_count)
{
if (byte_count >= 1099511627776)
return String.Format ("{0:##.##} ᴛʙ", Math.Round (byte_count / 1099511627776, 2));
else if (byte_count >= 1073741824)
return String.Format ("{0:##.##} ɢʙ", Math.Round (byte_count / 1073741824, 1));
else if (byte_count >= 1048576)
return String.Format ("{0:##.##} ᴍʙ", Math.Round (byte_count / 1048576, 1));
else if (byte_count >= 1024)
return String.Format ("{0:##.##} ᴋʙ", Math.Round (byte_count / 1024, 0));
else
return byte_count.ToString () + " ʙ";
}
public static bool IsSymlink (this FileSystemInfo file)
{
return ((file.Attributes & FileAttributes.ReparsePoint) == FileAttributes.ReparsePoint);
}
public static string ToPrettyDate (this DateTime timestamp)
{
TimeSpan time_diff = DateTime.Now.Subtract (timestamp);
int day_diff = (int) time_diff.TotalDays;
DateTime yesterday = DateTime.Today.AddDays (-1);
if (timestamp >= yesterday && timestamp < DateTime.Today) {
return "yesterday at " + timestamp.ToString ("HH:mm");
} else if (day_diff == 0) {
return "today at " + timestamp.ToString ("HH:mm");
} else if (day_diff < 7) {
return timestamp.ToString ("dddd");
} else if (day_diff < 31) {
if (day_diff < 14)
return "last week";
else
return string.Format ("{0} weeks ago", Math.Ceiling ((double) day_diff / 7));
} else if (day_diff < 62) {
return "last month";
} else {
return string.Format ("{0} months ago", Math.Ceiling ((double) day_diff / 31));
}
}
public static string ReplaceUnderscoreWithSpace (this string s)
{
int len = s.Length, lead = 0, trail = 0;
for (int i = 0; i < len && s[i] == '_'; i++, lead++)
; // nop
for (int i = len - 1; i >= lead && s[i] == '_'; i--, trail++)
; // nop
if (lead == 0 && trail == 0)
return s.Replace("_", " "); // fast code path
else
return s.Substring (0, lead) +
s.Substring (lead, len - lead - trail).Replace ("_", " ") +
s.Substring (len - trail, trail);
}
}
}
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