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 == "dmpkg":
  28                         return "application/x-dream-package"
  29                 elif ext == "ts":
  30                         return "video/MP2T"
  31                 elif ext == "iso":
  32                         return "video/x-dvd-iso"
  33                 elif file[-12:].lower() == "video_ts.ifo":
  34                         return "video/x-dvd"
  35                 elif ext == "dat" and file[-11:-6].lower() == "avseq":
  36                         return "video/x-vcd"
  37         return type
  38
  39 class Scanner:
  40         def __init__(self, name, mimetypes= [], paths_to_scan = [], description = "", openfnc = None):
  41                 self.mimetypes = mimetypes
  42                 self.name = name
  43                 self.paths_to_scan = paths_to_scan
  44                 self.description = description
  45                 self.openfnc = openfnc
  46
  47         def checkFile(self, file):
  48                 return True
  49
  50         def handleFile(self, res, file):
  51                 if (self.mimetypes is None or file.mimetype in self.mimetypes) and self.checkFile(file):
  52                         res.setdefault(self, []).append(file)
  53
  54         def __repr__(self):
  55                 return "<Scanner " + self.name + ">"
  56
  57         def open(self, list, *args, **kwargs):
  58                 if self.openfnc is not None:
  59                         self.openfnc(list, *args, **kwargs)
  60
  61 class ScanPath:
  62         def __init__(self, path, with_subdirs = False):
  63                 self.path = path
  64                 self.with_subdirs = with_subdirs
  65
  66         def __repr__(self):
  67                 return self.path + "(" + str(self.with_subdirs) + ")"
  68
  69         # we will use this in a set(), so we need to implement __hash__ and __cmp__
  70         def __hash__(self):
  71                 return self.path.__hash__() ^ self.with_subdirs.__hash__()
  72
  73         def __cmp__(self, other):
  74                 if self.path < other.path:
  75                         return -1
  76                 elif self.path > other.path:
  77                         return +1
  78                 else:
  79                         return self.with_subdirs.__cmp__(other.with_subdirs)
  80
  81 class ScanFile:
  82         def __init__(self, path, mimetype = None, size = None, autodetect = True):
  83                 self.path = path
  84                 if mimetype is None and autodetect:
  85                         self.mimetype = getType(path)
  86                 else:
  87                         self.mimetype = mimetype
  88                 self.size = size
  89
  90         def __repr__(self):
  91                 return "<ScanFile " + self.path + " (" + str(self.mimetype) + ", " + str(self.size) + " MB)>"
  92
  93 def execute(option):
  94         print "execute", option
  95         if option is None:
  96                 return
  97
  98         (_, scanner, files, session) = option
  99         scanner.open(files, session)
 100
 101 def scanDevice(mountpoint):
 102         scanner = [ ]
 103
 104         for p in plugins.getPlugins(PluginDescriptor.WHERE_FILESCAN):
 105                 l = p()
 106                 if not isinstance(l, list):
 107                         l = [l]
 108                 scanner += l
 109
 110         print "scanner:", scanner
 111
 112         res = { }
 113
 114         # merge all to-be-scanned paths, with priority to
 115         # with_subdirs.
 116
 117         paths_to_scan = set()
 118
 119         # first merge them all...
 120         for s in scanner:
 121                 paths_to_scan.update(set(s.paths_to_scan))
 122
 123         # ...then remove with_subdir=False when same path exists
 124         # with with_subdirs=True
 125         for p in set(paths_to_scan):
 126                 if p.with_subdirs == True and ScanPath(path=p.path) in paths_to_scan:
 127                         paths_to_scan.remove(ScanPath(path=p.path))
 128
 129         # convert to list
 130         paths_to_scan = list(paths_to_scan)
 131
 132         from Components.Harddisk import HarddiskManager
 133         class CdromManager(HarddiskManager):
 134                 def __init__(self):
 135                         pass
 136         cdaman = CdromManager()
 137         blockdev = mountpoint.split('/')[2]
 138         error, blacklisted, removable, is_cdrom, partitions = cdaman.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)])