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105 lines
3.0 KiB
Python
Executable File
105 lines
3.0 KiB
Python
Executable File
#=======================================================================
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__version__ = '''0.0.01'''
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__sub_version__ = '''20120317005456'''
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__copyright__ = '''(c) Alex A. Naanou 2011'''
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#-----------------------------------------------------------------------
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import os
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import sha
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import md5
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import time
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import pyexiv2 as metadata
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#-----------------------------------------------------------------------
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# XXX need a strategy to check if two files that have the same GID are
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# identical, and if so, need to destinguish them in the GID...
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# might be a good idea to add a file hash
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# XXX not yet sure if this is unique enough to avoid conflicts if one
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# photographer has enough cameras...
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# XXX also might be wise to add a photographer ID into here...
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##!!! add gid info section to identify the options used to greate a gid, e.g. EXIF date vs. ctime, etc.
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##!!! do a general revision and remove leacy...
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def image_gid(path, date=None,
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format='%(artist)s-%(date)s-%(name)s',
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date_format='%Y%m%d-%H%M%S',
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default_artist='Unknown',
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use_ctime=False,
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hash_func=sha.sha):
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'''
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Calgulate image GID.
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Main gid criteria:
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- unique
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- calculable from the item (preferably any sub-item)
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- human-readable
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Default format:
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<artist>-<datetime>-<filename>
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Example:
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Alex_A.Naanou-20110627-195706-DSC_1234
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If hash_func is not None, then the function will be used to henerate
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a hex hash from the above string.
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Supported fields:
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%(artist)s - Exif.Image.Artist field, stripped and spaces replaced
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with underscores.
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%(date)s - Exif.Image.DateTime formated to date_format argument.
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%(name)s - file name.
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NOTE: date and time are the date and time the image was made ('Exif.Image.DateTime')
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NOTE: need EXIF data to generate a GID
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'''
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# get the filename...
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data = {
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'name': os.path.splitext(os.path.split(path)[-1])[0],
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}
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##!!! this might fail...
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i = metadata.ImageMetadata('%s' % path)
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try:
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i.read()
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except IOError:
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# can't read exif...
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i = None
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# check if we need a date in the id...
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if '%(date)s' in format:
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if date is not None:
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data['date'] = time.strftime(date_format, time.gmtime(date))
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elif use_ctime or i is None:
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date = os.path.getctime(path)
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data['date'] = time.strftime(date_format, time.gmtime(date))
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else:
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date = i['Exif.Image.DateTime'].value
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data['date'] = date.strftime(date_format)
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# check if we need an artist...
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if '%(artist)s' in format:
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data['artist'] = default_artist
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if i is not None:
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try:
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data['artist'] = i['Exif.Image.Artist'].value.strip().replace(' ', '_')
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except KeyError:
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pass
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if hash_func is not None:
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return hash_func(format % data).hexdigest()
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return format % data
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#-----------------------------------------------------------------------
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if __name__ == '__main__':
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pass
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#=======================================================================
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# vim:set ts=4 sw=4 nowrap :
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