77 lines
2.3 KiB
Python
77 lines
2.3 KiB
Python
from __future__ import absolute_import, unicode_literals
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import re
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class MpdUriMapper(object):
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"""
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Maintains the mappings between uniquified MPD names and URIs.
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"""
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#: The Mopidy core API. An instance of :class:`mopidy.core.Core`.
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core = None
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_invalid_browse_chars = re.compile(r'[\n\r]')
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_invalid_playlist_chars = re.compile(r'[/]')
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def __init__(self, core=None):
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self.core = core
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self._uri_from_name = {}
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self._name_from_uri = {}
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def _create_unique_name(self, name, uri):
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stripped_name = self._invalid_browse_chars.sub(' ', name)
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name = stripped_name
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i = 2
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while name in self._uri_from_name:
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if self._uri_from_name[name] == uri:
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return name
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name = '%s [%d]' % (stripped_name, i)
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i += 1
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return name
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def insert(self, name, uri):
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"""
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Create a unique and MPD compatible name that maps to the given URI.
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"""
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name = self._create_unique_name(name, uri)
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self._uri_from_name[name] = uri
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self._name_from_uri[uri] = name
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return name
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def uri_from_name(self, name):
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"""
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Return the uri for the given MPD name.
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"""
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if name in self._uri_from_name:
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return self._uri_from_name[name]
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def refresh_playlists_mapping(self):
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"""
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Maintain map between playlists and unique playlist names to be used by
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MPD.
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"""
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if self.core is not None:
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for playlist in self.core.playlists.playlists.get():
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if not playlist.name:
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continue
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# TODO: add scheme to name perhaps 'foo (spotify)' etc.
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name = self._invalid_playlist_chars.sub('|', playlist.name)
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self.insert(name, playlist.uri)
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def playlist_uri_from_name(self, name):
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"""
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Helper function to retrieve a playlist URI from its unique MPD name.
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"""
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if not self._uri_from_name:
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self.refresh_playlists_mapping()
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return self._uri_from_name.get(name)
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def playlist_name_from_uri(self, uri):
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"""
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Helper function to retrieve the unique MPD playlist name from its URI.
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"""
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if uri not in self._name_from_uri:
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self.refresh_playlists_mapping()
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return self._name_from_uri[uri]
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