Add swappable CSS for HTML previews.

[librarian.git] / librarian / __init__.py

diff --git a/librarian/__init__.py b/librarian/__init__.py
index 32a3af0..119b6b1 100644 (file)
--- a/librarian/__init__.py
+++ b/librarian/__init__.py
@@ -3,29 +3,41 @@
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #

-from __future__ import with_statement
+from __future__ import print_function, unicode_literals

 
 import os
 import re
 import shutil
 
 import os
 import re
 import shutil

+from tempfile import NamedTemporaryFile
+import urllib
+from lxml import etree
+import six
+from six.moves.urllib.request import FancyURLopener
+from .util import makedirs

 
 

-class ParseError(Exception):
-    def __str__(self):
-        """ Dirty workaround for Python Unicode handling problems. """
-        return self.message

 
 

-    def __unicode__(self):
+@six.python_2_unicode_compatible
+class UnicodeException(Exception):
+    def __str__(self):

         """ Dirty workaround for Python Unicode handling problems. """
         """ Dirty workaround for Python Unicode handling problems. """

-        return self.message
+        args = self.args[0] if len(self.args) == 1 else self.args
+        try:
+            message = six.text_type(args)
+        except UnicodeDecodeError:
+            message = six.text_type(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
 


@@ -55,73 +67,56 @@ class EmptyNamespace(XMLNamespace):
         return tag
 
 # some common namespaces we use
         return tag
 
 # some common namespaces we use

+XMLNS = XMLNamespace('http://www.w3.org/XML/1998/namespace')

 RDFNS = XMLNamespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')
 DCNS = XMLNamespace('http://purl.org/dc/elements/1.1/')
 XINS = XMLNamespace("http://www.w3.org/2001/XInclude")
 XHTMLNS = XMLNamespace("http://www.w3.org/1999/xhtml")
 NCXNS = XMLNamespace("http://www.daisy.org/z3986/2005/ncx/")
 OPFNS = XMLNamespace("http://www.idpf.org/2007/opf")
 RDFNS = XMLNamespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')
 DCNS = XMLNamespace('http://purl.org/dc/elements/1.1/')
 XINS = XMLNamespace("http://www.w3.org/2001/XInclude")
 XHTMLNS = XMLNamespace("http://www.w3.org/1999/xhtml")
 NCXNS = XMLNamespace("http://www.daisy.org/z3986/2005/ncx/")
 OPFNS = XMLNamespace("http://www.idpf.org/2007/opf")

+PLMETNS = XMLNamespace("http://dl.psnc.pl/schemas/plmet/")

 
 WLNS = EmptyNamespace()
 
 
 
 WLNS = EmptyNamespace()
 
 

+@six.python_2_unicode_compatible

 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-z0-9]+)(/(?P<lang>[a-z]{3}))?/?$')
-
-    def __init__(self, uri=None):
-        if uri is not None:
-            uri = unicode(uri)
-            self.uri = uri
-            match = self._re_wl_uri.match(uri)
-            if not match:
-                raise ValueError('Supplied URI (%s) does not match '
-                        'the WL document URI template.' % uri)
-            self.slug = match.group('slug')
-            self.language = match.group('lang') or self.DEFAULT_LANGUAGE
+    _re_wl_uri = re.compile(r'http://(www\.)?wolnelektury.pl/katalog/lektur[ay]/'
+            '(?P<slug>[-a-z0-9]+)/?$')
+
+    def __init__(self, uri):
+        uri = six.text_type(uri)
+        self.uri = uri
+        self.slug = uri.rstrip('/').rsplit('/', 1)[-1]
+
+    @classmethod
+    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)

 
     @classmethod
 
     @classmethod

-    def from_slug_and_lang(cls, slug, lang):
-        """Contructs an URI from slug and language code.
+    def from_slug(cls, slug):
+        """Contructs an URI from slug.

 
 

-        >>> WLURI.from_slug_and_lang('a-slug', WLURI.DEFAULT_LANGUAGE).uri
-        u'http://wolnelektury.pl/katalog/lektura/a-slug/'
-        >>> WLURI.from_slug_and_lang('a-slug', 'deu').uri
-        u'http://wolnelektury.pl/katalog/lektura/a-slug/deu/'
+        >>> print(WLURI.from_slug('a-slug').uri)
+        http://wolnelektury.pl/katalog/lektura/a-slug/

 
         """
 
         """

-        if lang is None:
-            lang = cls.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 + '/'

         return cls(uri)
 
         return cls(uri)
 

-    def __unicode__(self):
-        return self.uri
-

     def __str__(self):
         return self.uri
 
     def __eq__(self, other):
     def __str__(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 validate_language(self, language):
-        if language != self.language:
-            raise ValidationError("Incorrect language definition in URI")
+        return self.slug == other.slug

 
 
 class DocProvider(object):
 
 
 class DocProvider(object):


@@ -130,18 +125,14 @@ 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):


@@ -150,15 +141,13 @@ 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'
-        return open(os.path.join(self.dir, fname))
+    def by_slug(self, slug):
+        fname = slug + '.xml'
+        return open(os.path.join(self.dir, fname), 'rb')

 
 
 
 

-import lxml.etree as etree
-import dcparser
+from . import dcparser

 
 DEFAULT_BOOKINFO = dcparser.BookInfo(
         { RDFNS('about'): u'http://wiki.wolnepodreczniki.pl/Lektury:Template'},
 
 DEFAULT_BOOKINFO = dcparser.BookInfo(
         { RDFNS('about'): u'http://wiki.wolnepodreczniki.pl/Lektury:Template'},


@@ -168,7 +157,7 @@ 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'):


@@ -183,14 +172,14 @@ DEFAULT_BOOKINFO = dcparser.BookInfo(
 def xinclude_forURI(uri):
     e = etree.Element(XINS("include"))
     e.set("href", uri)
 def xinclude_forURI(uri):
     e = etree.Element(XINS("include"))
     e.set("href", uri)

-    return etree.tostring(e, encoding=unicode)
+    return etree.tostring(e, encoding='unicode')

 
 def wrap_text(ocrtext, creation_date, bookinfo=DEFAULT_BOOKINFO):
     """Wrap the text within the minimal XML structure with a DC template."""
     bookinfo.created_at = creation_date
 
     dcstring = etree.tostring(bookinfo.to_etree(), \
 
 def wrap_text(ocrtext, creation_date, bookinfo=DEFAULT_BOOKINFO):
     """Wrap the text within the minimal XML structure with a DC template."""
     bookinfo.created_at = creation_date
 
     dcstring = etree.tostring(bookinfo.to_etree(), \

-        method='xml', encoding=unicode, pretty_print=True)
+        method='xml', encoding='unicode', pretty_print=True)

 
     return u'<utwor>\n' + dcstring + u'\n<plain-text>\n' + ocrtext + \
         u'\n</plain-text>\n</utwor>'
 
     return u'<utwor>\n' + dcstring + u'\n<plain-text>\n' + ocrtext + \
         u'\n</plain-text>\n</utwor>'


@@ -200,7 +189,7 @@ def serialize_raw(element):
     b = u'' + (element.text or '')
 
     for child in element.iterchildren():
     b = u'' + (element.text or '')
 
     for child in element.iterchildren():

-        e = etree.tostring(child, method='xml', encoding=unicode,
+        e = etree.tostring(child, method='xml', encoding='unicode',

                 pretty_print=True)
         b += e
 
                 pretty_print=True)
         b += e
 


@@ -220,7 +209,7 @@ def get_resource(path):
 class OutputFile(object):
     """Represents a file returned by one of the converters."""
 
 class OutputFile(object):
     """Represents a file returned by one of the converters."""
 

-    _string = None
+    _bytes = None

     _filename = None
 
     def __del__(self):
     _filename = None
 
     def __del__(self):


@@ -228,14 +217,14 @@ class OutputFile(object):
             os.unlink(self._filename)
 
     def __nonzero__(self):
             os.unlink(self._filename)
 
     def __nonzero__(self):

-        return self._string is not None or self._filename is not None
+        return self._bytes is not None or self._filename is not None

 
     @classmethod
 
     @classmethod

-    def from_string(cls, string):
+    def from_bytes(cls, bytestring):

         """Converter returns contents of a file as a string."""
 
         instance = cls()
         """Converter returns contents of a file as a string."""
 
         instance = cls()

-        instance._string = string
+        instance._bytes = bytestring

         return instance
 
     @classmethod
         return instance
 
     @classmethod


@@ -246,33 +235,31 @@ class OutputFile(object):
         instance._filename = filename
         return instance
 
         instance._filename = filename
         return instance
 

-    def get_string(self):
-        """Get file's contents as a string."""
+    def get_bytes(self):
+        """Get file's contents as a bytestring."""

 
         if self._filename is not None:
 
         if self._filename is not None:

-            with open(self._filename) as f:
+            with open(self._filename, 'rb') as f:

                 return f.read()
         else:
                 return f.read()
         else:

-            return self._string
+            return self._bytes

 
     def get_file(self):
         """Get file as a file-like object."""
 
 
     def get_file(self):
         """Get file as a file-like object."""
 

-        if self._string is not None:
-            from StringIO import StringIO
-            return StringIO(self._string)
+        if self._bytes is not None:
+            return six.BytesIO(self._bytes)

         elif self._filename is not None:
         elif self._filename is not None:

-            return open(self._filename)
+            return open(self._filename, 'rb')

 
     def get_filename(self):
         """Get file as a fs path."""
 
         if self._filename is not None:
             return self._filename
 
     def get_filename(self):
         """Get file as a fs path."""
 
         if self._filename is not None:
             return self._filename

-        elif self._string is not None:
-            from tempfile import NamedTemporaryFile
+        elif self._bytes is not None:

             temp = NamedTemporaryFile(prefix='librarian-', delete=False)
             temp = NamedTemporaryFile(prefix='librarian-', delete=False)

-            temp.write(self._string)
+            temp.write(self._bytes)

             temp.close()
             self._filename = temp.name
             return self._filename
             temp.close()
             self._filename = temp.name
             return self._filename


@@ -283,6 +270,10 @@ class OutputFile(object):
         """Save file to a path. Create directories, if necessary."""
 
         dirname = os.path.dirname(os.path.abspath(path))
         """Save file to a path. Create directories, if necessary."""
 
         dirname = os.path.dirname(os.path.abspath(path))

-        if not os.path.isdir(dirname):
-            os.makedirs(dirname)
+        makedirs(dirname)

         shutil.copy(self.get_filename(), path)
         shutil.copy(self.get_filename(), path)

+
+
+class URLOpener(FancyURLopener):
+    version = 'FNP Librarian (http://github.com/fnp/librarian)'
+urllib._urlopener = URLOpener()