Subliminal update

libs/guessit/transfo/__init__.py

@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# GuessIt - A library for guessing information from filenames
+# Copyright (c) 2012 Nicolas Wack <wackou@gmail.com>
+#
+# GuessIt is free software; you can redistribute it and/or modify it under
+# the terms of the Lesser GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# GuessIt is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# Lesser GNU General Public License for more details.
+#
+# You should have received a copy of the Lesser GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+from guessit import Guess
+from guessit.patterns import canonical_form
+from guessit.textutils import clean_string
+import logging
+
+log = logging.getLogger('guessit.transfo')
+
+
+def found_property(node, name, confidence):
+    node.guess = Guess({name: node.clean_value}, confidence=confidence)
+    log.debug('Found with confidence %.2f: %s' % (confidence, node.guess))
+
+
+def format_guess(guess):
+    """Format all the found values to their natural type.
+    For instance, a year would be stored as an int value, etc...
+
+    Note that this modifies the dictionary given as input.
+    """
+    for prop, value in guess.items():
+        if prop in ('season', 'episodeNumber', 'year', 'cdNumber',
+                    'cdNumberTotal', 'bonusNumber', 'filmNumber'):
+            guess[prop] = int(guess[prop])
+        elif isinstance(value, basestring):
+            if prop in ('edition',):
+                value = clean_string(value)
+            guess[prop] = canonical_form(value)
+
+    return guess
+
+
+def find_and_split_node(node, strategy, logger):
+    string = ' %s ' % node.value # add sentinels
+    for matcher, confidence in strategy:
+        if getattr(matcher, 'use_node', False):
+            result, span = matcher(string, node)
+        else:
+            result, span = matcher(string)
+
+        if result:
+            # readjust span to compensate for sentinels
+            span = (span[0] - 1, span[1] - 1)
+
+            if isinstance(result, Guess):
+                if confidence is None:
+                    confidence = result.confidence(result.keys()[0])
+            else:
+                if confidence is None:
+                    confidence = 1.0
+
+            guess = format_guess(Guess(result, confidence=confidence))
+            msg = 'Found with confidence %.2f: %s' % (confidence, guess)
+            (logger or log).debug(msg)
+
+            node.partition(span)
+            absolute_span = (span[0] + node.offset, span[1] + node.offset)
+            for child in node.children:
+                if child.span == absolute_span:
+                    child.guess = guess
+                else:
+                    find_and_split_node(child, strategy, logger)
+            return
+
+
+class SingleNodeGuesser(object):
+    def __init__(self, guess_func, confidence, logger=None):
+        self.guess_func = guess_func
+        self.confidence = confidence
+        self.logger = logger
+
+    def process(self, mtree):
+        # strategy is a list of pairs (guesser, confidence)
+        # - if the guesser returns a guessit.Guess and confidence is specified,
+        #   it will override it, otherwise it will leave the guess confidence
+        # - if the guesser returns a simple dict as a guess and confidence is
+        #   specified, it will use it, or 1.0 otherwise
+        strategy = [ (self.guess_func, self.confidence) ]
+
+        for node in mtree.unidentified_leaves():
+            find_and_split_node(node, strategy, self.logger)