lib/python/Components/Scanner.py

   1 from Plugins.Plugin import PluginDescriptor
   2 from Components.PluginComponent import plugins
   3
   4 from os import path as os_path, walk as os_walk
   5 from string import lower
   6 from mimetypes import guess_type
   7
   8 def getExtension(file):
   9         p = file.rfind('.')
  10         if p == -1:
  11                 ext = ""
  12         else:
  13                 ext = file[p+1:]
  14
  15         return lower(ext)
  16
  17 def getType(file):
  18         (type, _) = guess_type(file)
  19         if type is None:
  20                 # Detect some mimetypes unknown to dm7025
  21                 # TODO: do mimetypes.add_type once should be better
  22                 ext = getExtension(file)
  23                 if ext == "ipk":
  24                         return "application/x-debian-package"
  25                 elif ext == "ogg":
  26                         return "application/ogg"
  27                 elif ext == "flac":
  28                         return "audio/x-flac"
  29                 elif ext == "dmpkg":
  30                         return "application/x-dream-package"
  31                 elif ext == "ts":
  32                         return "video/MP2T"
  33                 elif ext == "iso":
  34                         return "video/x-dvd-iso"
  35                 elif file[-12:].lower() == "video_ts.ifo":
  36                         return "video/x-dvd"
  37                 elif ext == "dat" and file[-11:-6].lower() == "avseq":
  38                         return "video/x-vcd"
  39         return type
  40
  41 class Scanner:
  42         def __init__(self, name, mimetypes= [], paths_to_scan = [], description = "", openfnc = None):
  43                 self.mimetypes = mimetypes
  44                 self.name = name
  45                 self.paths_to_scan = paths_to_scan
  46                 self.description = description
  47                 self.openfnc = openfnc
  48
  49         def checkFile(self, file):
  50                 return True
  51
  52         def handleFile(self, res, file):
  53                 if (self.mimetypes is None or file.mimetype in self.mimetypes) and self.checkFile(file):
  54                         res.setdefault(self, []).append(file)
  55
  56         def __repr__(self):
  57                 return "<Scanner " + self.name + ">"
  58
  59         def open(self, list, *args, **kwargs):
  60                 if self.openfnc is not None:
  61                         self.openfnc(list, *args, **kwargs)
  62
  63 class ScanPath:
  64         def __init__(self, path, with_subdirs = False):
  65                 self.path = path
  66                 self.with_subdirs = with_subdirs
  67
  68         def __repr__(self):
  69                 return self.path + "(" + str(self.with_subdirs) + ")"
  70
  71         # we will use this in a set(), so we need to implement __hash__ and __cmp__
  72         def __hash__(self):
  73                 return self.path.__hash__() ^ self.with_subdirs.__hash__()
  74
  75         def __cmp__(self, other):
  76                 if self.path < other.path:
  77                         return -1
  78                 elif self.path > other.path:
  79                         return +1
  80                 else:
  81                         return self.with_subdirs.__cmp__(other.with_subdirs)
  82
  83 class ScanFile:
  84         def __init__(self, path, mimetype = None, size = None, autodetect = True):
  85                 self.path = path
  86                 if mimetype is None and autodetect:
  87                         self.mimetype = getType(path)
  88                 else:
  89                         self.mimetype = mimetype
  90                 self.size = size
  91
  92         def __repr__(self):
  93                 return "<ScanFile " + self.path + " (" + str(self.mimetype) + ", " + str(self.size) + " MB)>"
  94
  95 def execute(option):
  96         print "execute", option
  97         if option is None:
  98                 return
  99
 100         (_, scanner, files, session) = option
 101         scanner.open(files, session)
 102
 103 def scanDevice(mountpoint):
 104         scanner = [ ]
 105
 106         for p in plugins.getPlugins(PluginDescriptor.WHERE_FILESCAN):
 107                 l = p()
 108                 if not isinstance(l, list):
 109                         l = [l]
 110                 scanner += l
 111
 112         print "scanner:", scanner
 113
 114         res = { }
 115
 116         # merge all to-be-scanned paths, with priority to
 117         # with_subdirs.
 118
 119         paths_to_scan = set()
 120
 121         # first merge them all...
 122         for s in scanner:
 123                 paths_to_scan.update(set(s.paths_to_scan))
 124
 125         # ...then remove with_subdir=False when same path exists
 126         # with with_subdirs=True
 127         for p in set(paths_to_scan):
 128                 if p.with_subdirs == True and ScanPath(path=p.path) in paths_to_scan:
 129                         paths_to_scan.remove(ScanPath(path=p.path))
 130
 131         # convert to list
 132         paths_to_scan = list(paths_to_scan)
 133
 134         from Components.Harddisk import harddiskmanager
 135         blockdev = mountpoint.split('/')[2]
 136         error, blacklisted, removable, is_cdrom, partitions = harddiskmanager.getBlockDevInfo(blockdev)
 137
 138         # now scan the paths
 139         for p in paths_to_scan:
 140                 path = os_path.join(mountpoint, p.path)
 141
 142                 for root, dirs, files in os_walk(path):
 143                         for f in files:
 144                                 path = os_path.join(root, f)
 145                                 if is_cdrom and path.endswith(".wav") and path[-13:-6] == ("/track-"):
 146                                         sfile = ScanFile(path,"audio/x-cda")
 147                                 else:
 148                                         sfile = ScanFile(path)
 149                                 for s in scanner:
 150                                         s.handleFile(res, sfile)
 151
 152                         # if we really don't want to scan subdirs, stop here.
 153                         if not p.with_subdirs:
 154                                 del dirs[:]
 155
 156         # res is a dict with scanner -> [ScanFiles]
 157         return res
 158
 159 def openList(session, files):
 160         if not isinstance(files, list):
 161                 files = [ files ]
 162
 163         scanner = [ ]
 164
 165         for p in plugins.getPlugins(PluginDescriptor.WHERE_FILESCAN):
 166                 l = p()
 167                 if not isinstance(l, list):
 168                         l = [l]
 169                 scanner += l
 170
 171         print "scanner:", scanner
 172
 173         res = { }
 174
 175         for file in files:
 176                 for s in scanner:
 177                         s.handleFile(res, file)
 178
 179         choices = [ (r.description, r, res[r], session) for r in res ]
 180         Len = len(choices)
 181         if Len > 1:
 182                 from Screens.ChoiceBox import ChoiceBox
 183
 184                 session.openWithCallback(
 185                         execute,
 186                         ChoiceBox,
 187                         title = "The following viewers were found...",
 188                         list = choices
 189                 )
 190                 return True
 191         elif Len:
 192                 execute(choices[0])
 193                 return True
 194
 195         return False
 196
 197 def openFile(session, mimetype, file):
 198         return openList(session, [ScanFile(file, mimetype)])