beagled/EvolutionMailDriver/MailCrawler.cs

   1
   2 //
   3 // MailCrawler.cs
   4 //
   5 // Copyright (C) 2004 Novell, Inc.
   6 //
   7 //
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining a
  10 // copy of this software and associated documentation files (the "Software"),
  11 // to deal in the Software without restriction, including without limitation
  12 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13 // and/or sell copies of the Software, and to permit persons to whom the
  14 // Software is furnished to do so, subject to the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be included in
  17 // all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25 // DEALINGS IN THE SOFTWARE.
  26 //
  27
  28 using System;
  29 using System.Collections;
  30 using System.IO;
  31
  32 using Beagle.Util;
  33 using Beagle.Daemon;
  34
  35 namespace Beagle.Daemon.EvolutionMailDriver {
  36
  37         class MailCrawler {
  38                 ArrayList roots = new ArrayList ();
  39
  40                 Hashtable last_write_time_cache = new Hashtable ();
  41                 ArrayList summaries = new ArrayList ();
  42                 ArrayList mboxes = new ArrayList ();
  43
  44                 public MailCrawler (params string[] paths)
  45                 {
  46                         foreach (string p in paths) {
  47                                 if (Directory.Exists (p))
  48                                         roots.Add (p);
  49                         }
  50                 }
  51
  52                 private bool FileIsInteresting (FileInfo file)
  53                 {
  54                         DateTime cached_time = new DateTime ();
  55                         if (last_write_time_cache.Contains (file.FullName))
  56                                 cached_time = (DateTime) last_write_time_cache [file.FullName];
  57
  58                         last_write_time_cache [file.FullName] = file.LastWriteTime;
  59
  60                         return cached_time < file.LastWriteTime;
  61                 }
  62
  63                 public void Crawl ()
  64                 {
  65                         summaries.Clear ();
  66                         mboxes.Clear ();
  67
  68                         Queue pending = new Queue ();
  69
  70                         foreach (string root in roots)
  71                                 pending.Enqueue (root);
  72
  73                         while (pending.Count > 0) {
  74
  75                                 string dir = (string) pending.Dequeue ();
  76
  77                                 foreach (string subdir in DirectoryWalker.GetDirectories (dir))
  78                                         pending.Enqueue (subdir);
  79
  80                                 foreach (FileInfo file in DirectoryWalker.GetFileInfos (dir)) {
  81                                         if (file.Name == "summary") {
  82                                                 if (FileIsInteresting (file))
  83                                                         summaries.Add (file);
  84                                         } else if (file.Extension == ".ev-summary") {
  85                                                 string mbox_name = Path.Combine (file.DirectoryName,
  86                                                                                  Path.GetFileNameWithoutExtension (file.Name));
  87                                                 FileInfo mbox_file = new FileInfo (mbox_name);
  88                                                 if (FileIsInteresting (mbox_file))
  89                                                         mboxes.Add (mbox_file);
  90                                         }
  91                                 }
  92                         }
  93                 }
  94
  95                 public ICollection Summaries {
  96                         get { return summaries; }
  97                 }
  98
  99                 public ICollection Mboxes {
 100                         get { return mboxes; }
 101                 }
 102         }
 103 }