#! /usr/bin/env python
#
# Display a list of authors and their occurrence in the bibfiles
#
# each output line is of the form:
#
#	Surname,I  N
#
# where I is their initial and N is the number of occurrences.  This can be 
# fed throug sort -n -r +1 to get a list of authors in descending order
# of occurrence.  Figure out who is your favourite co-author!

# Copyright (c) 2007, Peter Corke
#
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * The name of the copyright holder may not be used to endorse or 
#	promote products derived from this software without specific prior 
#	written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGE.


import Bibliography;
import BibEntry;
import BibTeX;
import string;
import sys;
import getopt;
import optparse;

## parse switches
usage = '''usage: %prog [options] [bibfiles]

:: Display a list of authors and their occurrence'''
p = optparse.OptionParser(usage)
#p.add_option('--reverse', dest='reverseSort', action='store_true',
#             help='sort into ascending data order (old at top)');
#p.add_option('--resolve', dest='resolve', action='store_true',
#             help='resolve cross reference entries');
#p.set_defaults(reverseSort=False, resolve=False);
(opts, args) = p.parse_args()
globals().update(opts.__dict__)

if len(args) == 0 and sys.stdin.isatty():
	p.print_help();
	sys.exit(0);


## read the input files	
bib = BibTeX.BibTeX();
if args:
	for f in args:
		bib.parseFile(f);
else:
	bib.parseFile();

# Build a list of unique names: Surname,Initial and update occurrence
nameList = {};
for be in bib:
	surnames = be.getAuthorsSurnameList();
	if surnames:
		for s in surnames:
			s = ','.join(s);
			if s in nameList:
				nameList[s] += 1
			else:
				nameList[s] = 1;

# display names and occurrence.
for s,v in  nameList.iteritems():
	print s, v;