# 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:

# DBRpatch - module for handling patched baselines

import re

import os.path #used for 'listpatches' 

import string

import glob

import dbrutils

import dbrbaseline

def newcompare(db1, db2): 

    db1files = set(db1.keys())

    db2files = set(db2.keys())

    removed = db1files - db2files

    added = db2files - db1files

    common = db1files & db2files

    touched = set()

    for file in common:

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

            print 'touched %s %s - %s' % (db1[file]['time'], db2[file]['time'],file)  

            touched.add(file)

    sizechanged = set()

    for file in common:

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

            sizechanged.add(file)

    changed = set()

    genmd5 = 1 #I probably want to try to generate... add this as a third arg???

    if(len(touched)):

      if(genmd5):

        md5testset = set()

        for file in touched:

          if((db1[file]['md5'] != 'xxx' ) and (db2[file]['md5'] == 'xxx')): #no point geenrating an MD5 if we've nothing to compare it to...

#            print 'testing %s' % file

            md5testset.add(file)

        md5s = dbrutils.generateMD5s(md5testset)

        for file in md5testset:

          db2[file]['md5'] = md5s[file]['md5']

      for file in touched:

        if(db1[file]['md5'] != db2[file]['md5']):                    

          changed.add(file)

    touched = touched - changed

    #remove the ones we know are changed

    touched = touched - changed

    results = dict()

    results['added'] = dict()

    results['removed'] = dict()

    results['touched'] = dict()

    results['changed'] = dict()

    results['untestable'] = dict()

    for file in added:

      results['added'][file] = db2[file]  

    for file in removed:

      results['removed'][file] = 0

    for file in touched:

      results['touched'][file] = db2[file]

    for file in changed:

      results['changed'][file] = db2[file]  

#    for file in untestable:

#      results['untestable'][file] = 0  

    return results

def printresults(results):

    for file in sorted (results['added']):

      print 'added:', file

    for file in sorted (results['removed']):

      print 'removed:', file              

#    for file in sorted (results['touched']):   

#      print 'touched:', file              

    for file in sorted (results['changed']):

      print 'changed:', file          

#    for file in sorted (results['untestable']):

#      print 'untestable:', file          

    if(len(results['added']) + len(results['removed']) + len(results['changed']) + len(results['untestable']) == 0):

      print '\nStatus:\tclean'

    else:

      print '\nStatus:\tdirty'

def newupdatedb(baseline,env):

    results = newcompare(baseline, env)

    printresults(results)

    for file in results['touched']:

      baseline[file]['time'] = env[file]['time']

    return results    

def newcreatepatch(name, db1, db2):

    results = newcompare(db1, db2)

    printresults(results)

    for file in results['touched']:

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

    patch = dict();

    patch['name'] = name

    patch['time'] = 'now!!!'   

    patch['removed'] = results['removed']

    added = results['added'].keys()

    md5sAdded = dbrutils.generateMD5s(added)

    for file in added:

      results['added'][file]['md5'] = md5sAdded[file]['md5']

    patch['added'] = results['added']

    print "Need to add in the untestable stuff here also!!!"

    patch['changed'] = results['changed']

    patchname = "%spatch_%s" %(dbrutils.patchpath(), name)

    createpatchzip(patch, patchname)

    #update the ownership 

    for file in patch['changed']:

        db1[file]['name'] = name

    return db1

def newcomparepatcheddbs(drive1, drive2):

    envdbroot = dbrutils.defaultdb()

    print "MattD: should move this function to a better location..."

    print 'Comparing %s with %s' % (drive2,drive1)

    db1 = loadpatcheddb(drive1)

    db2 = loadpatcheddb(drive2)

    results = newcompare(db1, db2)

    printresults(results)

def loadpatcheddb(drive):

    envdbroot = dbrutils.defaultdb()

    print 'Loading %s' % drive 

    baseline = dbrbaseline.readdb('%s%s' %(drive,envdbroot))

    if(len(baseline) > 0):      

      patches = loadpatches('%s/%s' %(drive,dbrutils.patchpath()))

      return createpatchedbaseline(baseline,patches)

    else:

      return dbrbaseline.readzippeddb(drive)

def createpatchzip(patch, patchname):

    patchtext = '%s.txt' % patchname

    patchtext = os.path.join(dbrutils.patchpath(),patchtext)

    writepatch(patch, patchtext)    

    files = set()

    files.update(patch['added'])

    files.update(patch['changed'])

    files.add(re.sub('\\\\','',patchtext)) #remove leading slash - Nasty - need to fix the whole EPOCROOT thing.

    zipname = '%s.zip' % patchname

    dbrutils.createzip(files, zipname)         

def updatebaseline(baseline, db):

  for file in (db.keys()):

    origin = db[file]['name']

    if(origin == 'baseline'):

      if(baseline[file]['time'] != db[file]['time']):

         baseline[file]['time'] = db[file]['time']

         print 'Updating timestamp for %s in baseline' % file

  return baseline

def updatepatches(patches, db):

  for file in (db.keys()):

      origin = db[file]['name']

      for patch in patches.keys():

        if(patches[patch]['name'] == origin):                                        

            mod=0                    

            if(file in patches[patch]['added']):

               mod = 'added'

            if(file in patches[patch]['changed']):

               mod = 'changed'

            if(mod):

                if (patches[patch][mod][file]['time'] != db[file]['time']):

                  patches[patch][mod][file]['time'] = db[file]['time']

                  print 'Updating timestamp in %s for %s' %(patches[patch]['name'],file)

  return patches            

def createpatchedbaseline(baseline,patches):

    files = dict()

    files = addtodb(files,baseline,'baseline')

    for patch in sorted(patches.keys()):

#        print 'adding patch: %s' % patch

        files = addtodb(files,patches[patch]['added'],patches[patch]['name'])

        files = addtodb(files,patches[patch]['changed'],patches[patch]['name'])

        files = removefromdb(files,patches[patch]['removed'],patches[patch]['name'])

    return files    

def removefromdb(db,removed,name):

    for file in removed:

        if(file in db):

#            print '%s removing %s' %(name,file)

            del db[file]

    return db

def addtodb(db,new,name):

    for file in new:

        if(file not in db):

            db[file] = dict()

#        else:

#            print '%s overriding %s' % (name,file)

        db[file]['time'] = new[file]['time']

        db[file]['md5'] = new[file]['md5']

        db[file]['size'] = new[file]['size']

        db[file]['name'] = name

    return db

def listpatches():

    patchfiles = glob.glob(os.path.join(dbrutils.patchpath(),'patch*.txt'))

    print 'Installed patches'

    for file in patchfiles:

      print '\t%s' % re.sub('.txt','',os.path.basename(file))

def removepatch(patch):

    path = dbrutils.patchpath()

    file = os.path.join(path,'%s.txt' % patch)

    files = set()

    files.add(file)

    dbrutils.deletefiles(files)

def loadpatches(path):

    patches = dict()

    patchfiles = glob.glob(os.path.join(path,'patch*.txt'))

    for file in patchfiles:

        print 'Loading patch: %s' % re.sub('.txt','',os.path.basename(file))

#        print 'Reading: %s\n' % file

#        patchname = re.match('\S+patch(\S+)\.txt',file)

#        print 'patchname %s' % patchname.group(1);

        patch = readpatch(file)

#        patches[patchname.group(1)] = patch

#        print 'Read %s from %s' % (patch['name'],file)

        patches[file] = patch

    return patches

def savepatches(patches):

    for patch in sorted(patches.keys()):

 #       print 'writing %s to %s' % (patches[patch]['name'],patch)

        writepatch(patches[patch], patch)

def writepatch(patch, filename):

    file = open(filename,'w')

#    print 'saving patch to %s' %filename

    file.write("name=%s\n" % patch['name']);

    file.write("time=%s\n" % patch['time']);

    removed = patch['removed']

    for filename in sorted(removed):

        str = "removed=%s\n" % filename

        file.write(str)

    added = patch['added']    

    for filename in sorted(added):

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

            added[filename].append('')

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

        file.write(str)

    changed = patch['changed']    

    for filename in sorted(changed):

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

            changed[filename].append('')

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

        file.write(str)

    file.close()

def readpatch(filename):

    file = open(filename,'r')

    #name=blah

    #time=blah

    #removed=file

    #added=time:size:md5:file

    #changed=time:size:md5:file

    patch = dict()

    removed = set()

    added = dict()

    changed = dict()

    for line in file:    

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

        type = results[0]

        if( type == 'name'):

            patch['name'] = results[1]

        elif( type == 'time'):

            patch['time'] = results[1]

        elif( type == 'removed'):            

            removed.add(results[1]) 

        elif(( type == 'added') or (type == 'changed')):

            results2 = re.split(':|\n',results[1])

            entry = dict()

            entry['time'] = results2[0]

            entry['size'] = results2[1]

            entry['md5'] = results2[2]

            if(type == 'added'):

                added[results2[3]] = entry

            else:

                changed[results2[3]] = entry

    file.close()

    patch['removed'] = removed

    patch['added'] = added

    patch['changed'] = changed

    return patch