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