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base structure. fixing lengths
[librarian.git] / librarian / __init__.py
diff --git a/librarian/__init__.py b/librarian/__init__.py
index 52234fe..c46d5d1 100644 (file)
--- a/librarian/__init__.py
+++ b/librarian/__init__.py
@@ -8,24 +8,34 @@ from __future__ import with_statement
 import os
 import re
 import shutil
 import os
 import re
 import shutil
+import urllib
 
 
-class ParseError(Exception):
+
+class UnicodeException(Exception):
     def __str__(self):
         """ Dirty workaround for Python Unicode handling problems. """
     def __str__(self):
         """ Dirty workaround for Python Unicode handling problems. """
-        return self.message
+        return unicode(self).encode('utf-8')
 
     def __unicode__(self):
         """ Dirty workaround for Python Unicode handling problems. """
 
     def __unicode__(self):
         """ Dirty workaround for Python Unicode handling problems. """
-        return self.message
+        args = self.args[0] if len(self.args) == 1 else self.args
+        try:
+            message = unicode(args)
+        except UnicodeDecodeError:
+            message = unicode(args, encoding='utf-8', errors='ignore')
+        return message
+
+class ParseError(UnicodeException):
+    pass
 
 
-class ValidationError(Exception):
+class ValidationError(UnicodeException):
     pass
 
 class NoDublinCore(ValidationError):
     """There's no DublinCore section, and it's required."""
     pass
 
     pass
 
 class NoDublinCore(ValidationError):
     """There's no DublinCore section, and it's required."""
     pass
 
-class NoProvider(Exception):
+class NoProvider(UnicodeException):
     """There's no DocProvider specified, and it's needed."""
     pass
 
     """There's no DocProvider specified, and it's needed."""
     pass
 
@@ -66,60 +76,45 @@ WLNS = EmptyNamespace()
 
 
 class WLURI(object):
 
 
 class WLURI(object):
-    """Represents a WL URI. Extracts slug and language from it."""
-    DEFAULT_LANGUAGE = u'pol'
-
+    """Represents a WL URI. Extracts slug from it."""
     slug = None
     slug = None
-    language = None
 
     example = 'http://wolnelektury.pl/katalog/lektura/template/'
 
     example = 'http://wolnelektury.pl/katalog/lektura/template/'
-    _re_wl_uri = re.compile('http://wolnelektury.pl/katalog/lektura/'
-            '(?P<slug>[-a-z]+)(/(?P<lang>[a-z]{3})/?)?')
+    _re_wl_uri = re.compile(r'http://(www\.)?wolnelektury.pl/katalog/lektura/'
+            '(?P<slug>[-a-z0-9]+)/?$')
 
 
-    def __init__(self, uri=None):
-        if uri is not None:
-            self.uri = uri
-            match = self._re_wl_uri.match(uri)
-            assert match
-            self.slug = match.group('slug')
-            self.language = match.group('lang') or self.DEFAULT_LANGUAGE
+    def __init__(self, uri):
+        uri = unicode(uri)
+        self.uri = uri
+        self.slug = uri.rstrip('/').rsplit('/', 1)[-1]
 
     @classmethod
 
     @classmethod
-    def from_slug_and_lang(cls, slug, lang):
-        """Contructs an URI from slug and language code.
+    def strict(cls, uri):
+        match = cls._re_wl_uri.match(uri)
+        if not match:
+            raise ValidationError(u'Invalid URI (%s). Should match: %s' % (
+                        uri, cls._re_wl_uri.pattern))
+        return cls(uri)
 
 
-        >>> WLURI.from_slug_and_lang('a-slug', WLURI.DEFAULT_LANGUAGE).uri
-        'http://wolnelektury.pl/katalog/lektura/a-slug/'
-        >>> WLURI.from_slug_and_lang('a-slug', 'deu').uri
-        'http://wolnelektury.pl/katalog/lektura/a-slug/deu/'
+    @classmethod
+    def from_slug(cls, slug):
+        """Contructs an URI from slug.
+
+        >>> WLURI.from_slug('a-slug').uri
+        u'http://wolnelektury.pl/katalog/lektura/a-slug/'
 
         """
 
         """
-        if lang is None:
-            lang = self.DEFAULT_LANGUAGE
         uri = 'http://wolnelektury.pl/katalog/lektura/%s/' % slug
         uri = 'http://wolnelektury.pl/katalog/lektura/%s/' % slug
-        if lang is not None and lang != cls.DEFAULT_LANGUAGE:
-            uri += lang + '/'
-        instance = cls()
-        instance.slug = slug
-        instance.language = lang
-        instance.uri = uri
-        return instance
+        return cls(uri)
 
     def __unicode__(self):
         return self.uri
 
 
     def __unicode__(self):
         return self.uri
 
-    def __eq__(self, other):
-        return self.slug, self.language == other.slug, other.language
-
-    def filename_stem(self):
-        stem = self.slug
-        if self.language != self.DEFAULT_LANGUAGE:
-            stem += '_' + self.language
-        return stem
+    def __str__(self):
+        return self.uri
 
 
-    def validate_language(self, language):
-        if language != self.language:
-            raise ValidationError("Incorrect language definition in URI")
+    def __eq__(self, other):
+        return self.slug == other.slug
 
 
 class DocProvider(object):
 
 
 class DocProvider(object):
@@ -128,18 +123,14 @@ class DocProvider(object):
     Used for generating joined files, like EPUBs.
     """
 
     Used for generating joined files, like EPUBs.
     """
 
-    def by_slug_and_lang(self, slug, lang=None):
-        """Should return a file-like object with a WL document XML."""
-        raise NotImplementedError
-
     def by_slug(self, slug):
         """Should return a file-like object with a WL document XML."""
     def by_slug(self, slug):
         """Should return a file-like object with a WL document XML."""
-        return self.by_slug_and_lang(slug)
+        raise NotImplementedError
 
 
-    def by_uri(self, uri):
+    def by_uri(self, uri, wluri=WLURI):
         """Should return a file-like object with a WL document XML."""
         """Should return a file-like object with a WL document XML."""
-        wluri = WLURI(uri)
-        return self.by_slug_and_lang(wluri.slug, wluri.language)
+        wluri = wluri(uri)
+        return self.by_slug(wluri.slug)
 
 
 class DirDocProvider(DocProvider):
 
 
 class DirDocProvider(DocProvider):
@@ -148,10 +139,9 @@ class DirDocProvider(DocProvider):
     def __init__(self, dir_):
         self.dir = dir_
         self.files = {}
     def __init__(self, dir_):
         self.dir = dir_
         self.files = {}
-        return super(DirDocProvider, self).__init__()
 
 
-    def by_slug_and_lang(self, slug, lang=None):
-        fname = WLURI.from_slug_and_lang(slug, lang).filename_stem() + '.xml'
+    def by_slug(self, slug):
+        fname = slug + '.xml'
         return open(os.path.join(self.dir, fname))
 
 
         return open(os.path.join(self.dir, fname))
 
 
@@ -166,7 +156,7 @@ DEFAULT_BOOKINFO = dcparser.BookInfo(
           DCNS('subject.type'): [u'Unknown'],
           DCNS('subject.genre'): [u'Unknown'],
           DCNS('date'): ['1970-01-01'],
           DCNS('subject.type'): [u'Unknown'],
           DCNS('subject.genre'): [u'Unknown'],
           DCNS('date'): ['1970-01-01'],
-          DCNS('language'): [WLURI.DEFAULT_LANGUAGE],
+          DCNS('language'): [u'pol'],
           # DCNS('date'): [creation_date],
           DCNS('publisher'): [u"Fundacja Nowoczesna Polska"],
           DCNS('description'):
           # DCNS('date'): [creation_date],
           DCNS('publisher'): [u"Fundacja Nowoczesna Polska"],
           DCNS('description'):
@@ -284,3 +274,8 @@ class OutputFile(object):
         if not os.path.isdir(dirname):
             os.makedirs(dirname)
         shutil.copy(self.get_filename(), path)
         if not os.path.isdir(dirname):
             os.makedirs(dirname)
         shutil.copy(self.get_filename(), path)
+
+
+class URLOpener(urllib.FancyURLopener):
+    version = 'FNP Librarian (http://github.com/fnp/librarian)'
+urllib._urlopener = URLOpener()