# Copyright (c) 2009 Symbian Foundation Ltd

# This component and the accompanying materials are made available

# under the terms of the License "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Symbian Foundation Ltd - initial contribution.

#

# Contributors:

# mattd <mattd@symbian.org>

#

# Description:

# DBRbaseline - module for handling vanilla baselines

#

import re

import os

import string

from os.path import join, isfile, stat

from stat import *

import dbrutils

def readdb(dbfile):

    db = dict()

    if(isfile(dbfile)):

        file = open(dbfile,'r')

#        regex = re.compile('(\S+)\s+(\S+)\s+(\S+)\s+(.+)\n')

        for line in file:

            #file structure 'timestamp size hash filename' avoids the problems of spaces in names, etc...

            results = re.split(':|\n',line)

            if(len(results) > 3):

              entry = dict()

              entry['time'] = results[0]

              entry['size'] = results[1]

              entry['md5'] = results[2]

              if(results[4]):

                entry['archive'] = results[4] 

                print entry['archive'] 

              db[results[3]] = entry

#            db[results[3]] = [results[0],results[1],results[2]]

#            bits = regex.match(line)

#            if(bits):

#                db[bits.group(3)] = [bits.group(0), bits.group(1), bits.group(2)]

        file.close()

    return db

def writedb(db, dbfile):

#    print 'Writing db to', dbfile

    file = open(dbfile,'w')

    for filename in sorted(db):

        if (len(db[filename]) < 3):

            db[filename].append('')

        str = "%s:%s:%s:%s" %( db[filename]['time'],db[filename]['size'],db[filename]['md5'], filename)

        if('archive' in db[filename]):

          str = "%s:%s" %(str,db[filename]['archive'])          

#        if(db[filename]['md5'] == 'xxx'):

#            print 'Warning: no MD5 for %s' % filename

#        str = "%s:%s:%s:%s\n" %( db[filename][0],db[filename][1],db[filename][2], filename)

        file.write('%s\n' % str)

    file.close()

def md5test(db, md5testset):

    changed = set()

    md5s = dbrutils.generateMD5s(md5testset)

    for file in md5testset:

        if(db[file]['md5'] != md5s[file]['md5']):

            changed.add(file)

    return changed

def updatedb(db1, db2):

  compareupdatedb(db1, db2, 1)

def comparedb(db1, db2):

  compareupdatedb(db1, db2, 0)

def compareupdatedb(db1, db2, update):

    print "compareupdatedb() is deprecated"

    db1files = set(db1.keys())

    db2files = set(db2.keys())

    removed = db1files - db2files

    added = db2files - db1files

    common = db1files & db2files

    touched = set()

    for file in common:

        if(db1[file]['time'] != db2[file]['time']):

            touched.add(file)

    sizechanged = set()

    for file in common:

        if(db1[file]['size'] != db2[file]['size']):

            sizechanged.add(file)

    #pobably won't bother with size changed... we know they're different...

#    md5testset = touched - sizechanged

    md5testset = touched

    changed = md5test(db1,md5testset)

    #remove the ones we know are changed

    touched = touched - changed

    print 'Comparing dbs/n'

    for file in sorted(added):

        print 'added:', file

    for file in sorted(removed):

        print 'removed:', file

    for file in sorted(touched):

        print 'touched:', file

    for file in sorted(changed):

        print 'changed:', file

    #update the touched...

    if(update):

      for file in sorted(touched):

          print 'Updating timestamp for: ',file

          db1[file]['time'] = db2[file]['time']