# usage:
#    listpropnames.py -d <directory>
#
#    <directory> is a folder containing .fzp files.  In each fzp file in the directory containing a <property> element:
#    like <property name="whatever" ...>
#	 list the name, if it's not already listed

import getopt
import sys
import os
import re


def usage():
    print("""
usage:
    listpropnames.py -d [directory]
    
    directory is a folder containing .fzp files.  
    In each fzp file in the directory containing a <property> element:
    list each different name attribute. 
    """)


def main():
    try:
        opts, args = getopt.getopt(sys.argv[1:], "hd:", ["help", "directory"])
    except getopt.GetoptError as err:
        # print help information and exit:
        print(str(err))  # will print something like "option -a not recognized"
        usage()
        sys.exit(2)
    outputDir = None

    for o, a in opts:
        # print o
        # print a
        if o in ("-d", "--directory"):
            outputDir = a
        elif o in ("-h", "--help"):
            usage()
            sys.exit(2)
        else:
            assert False, "unhandled option"

    if not outputDir:
        usage()
        sys.exit(2)

    names = []
    for filename in os.listdir(outputDir):
        if filename.endswith(".fzp"):
            infile = open(os.path.join(outputDir, filename), "r")
            fzp = infile.read()
            infile.close()
            match = re.search('<property.+name=\"(.+)\".*>.+</property>', fzp)
            if match:
                if not match.group(1) in names:
                    names.append(match.group(1))
                    print("{0}".format(match.group(1)))


if __name__ == "__main__":
    main()
