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# DeGAL - A pretty simple web image gallery

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# Copyright (C) 2007 Tero Marttila

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# http://marttila.de/~terom/degal/

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#

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# This program is free software; you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# the Free Software Foundation; either version 2 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the

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# Free Software Foundation, Inc.,

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# 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

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#

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import settings

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def isImage (fname) :

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    """

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        Is the given filename likely to be an image file?

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    """

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    fname = fname.lower()

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    base, ext = os.path.splitext(fname)

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    ext = ext.lstrip('.')

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    return ext in settings.IMAGE_EXTS

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def readFile (path) :

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    fo = open(path, 'r')

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    data = fo.read()

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    fo.close()

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    return data

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def fuzzyDecode (bytes) :

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    try :

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        return bytes.decode('utf8')

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    except UnicodeDecodeError :

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        return bytes.decode('latin1', 'replace')

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def readTitleDescr (path) :

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    """

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        Read a title.txt or <imgname>.txt file

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    """

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    if os.path.exists(path) :

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        content = readFile(path)

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        if '---' in content :

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            title, descr = content.split('---', 1)

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        else :

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            title, descr = content, ''

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        title, descr = fuzzyDecode(title), fuzzyDecode(descr)

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        return title.strip(), descr.strip()

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    return u"", u""

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def url (*parts, **kwargs) :

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    abs = kwargs.pop('abs', False)

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    up = kwargs.pop('up', 0)

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    trailing = kwargs.pop('trailing', False)

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    return '/'.join(([""]*int(abs)) + ([".."]*up) + list(parts) + ([""]*int(trailing)))

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url_join = url

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def path_join (*parts) :

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    return os.path.join(*[part for part in parts if part is not None])

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def strip_path (path) :

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    return path.lstrip('.').lstrip('/')

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