Synnefo

#!/usr/bin/env python

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from sqlalchemy import Table

from sqlalchemy.sql import select

from binascii import hexlify

from pithos.backends.lib.hashfiler import Blocker

from pithos.backends.lib.sqlalchemy import Node

from pithos.aai.models import PithosUser

from django.conf import settings

from pithos.backends.modular import CLUSTER_NORMAL, CLUSTER_HISTORY, CLUSTER_DELETED

from pithos.backends.lib.sqlalchemy.node import Node

from lib.transfer import upload

from lib.hashmap import HashMap, file_read_iterator

from lib.client import Fault

from lib.migrate import Migration, Cache

from calendar import timegm

import json

import os

import sys

import hashlib

import mimetypes

class ObjectMigration(Migration):

    def __init__(self, old_db, db, f):

        Migration.__init__(self, old_db)

        self.cache = Cache(db)

    def create_node(self, username, container, object, filepath, mimetype):

        obj = ''

        path = '/'.join(object.split('/')[:-1])

        name =  object.split('/')[-1]

        #create directory markers

        for f in path.split('/'):

            obj = '%s/%s' %(obj, f) if obj else f

            try:

                md5 = hashlib.md5()

                meta = {'Content-Type':'application/directory',

                        'hash':  md5.hexdigest().lower()}

                self.backend.update_object_hashmap(username, username, container, obj, 0, [], meta) 

            except NameError, e:

                pass

        parent_path = '%s/%s' %(username, container)

        parent_node = self.backend.node.node_lookup(parent_path)

        path = '%s/%s' %(parent_path, object)

        nodeid = self.backend.node.node_create(parent_node, path)

        return nodeid

    def create_history(self, header_id, node_id, deleted=False):

        i = 0

        map = HashMap(self.backend.block_size, self.backend.hash_algorithm)

        for t, rowcount  in self.retrieve_node_versions(header_id):

            size, modyfied_by, filepath, mimetype, modificationdate = t

            cluster = CLUSTER_HISTORY if i < rowcount - 1 else CLUSTER_NORMAL

            cluster = cluster if not deleted else CLUSTER_DELETED

            hash = self.cache.get(filepath)

            if hash == None:

                raise Exception("Missing hash") 

            args = (node_id, hash, size, None, modyfied_by, cluster)

            serial = self.backend.node.version_create(*args)[0]

            meta = {'hash':hash,

                    'content-type':mimetype}

            self.backend.node.attribute_set(serial, ((k, v) for k, v in meta.iteritems()))

            timestamp = timegm(modificationdate.timetuple())

            microseconds = modificationdate.time().microsecond

            f.write('update versions set mtime=\'%10d.%6d\' where serial=%s;' %(timestamp, microseconds, serial))

            i += 1

    def create_metadata(self, header_id, node_id):

        for t in self.retrieve_metadata(header_id):

            pass

    def create_objects(self):

        for username, headerid, folderid, filename, deleted, filepath, mimetype in self.retrieve_current_nodes():

            path = self.retrieve_path(folderid)[1:]

            container = 'pithos' if not deleted else 'trash'

            #create container if it does not exist

            try:

                self.backend._lookup_container(username, container)

            except NameError:

                self.backend.put_container(username, username, container) 

            #create node

            object = '%s/%s' %(path, filename)

            nodeid = self.create_node(username, container, object, filepath, mimetype)

            #create node history

            self.create_history(headerid, nodeid, deleted)

            self.create_metadata(headerid, nodeid)

            #self.set_public()

            #self.statistics()

            #self.set_permissions()

    def retrieve_path(self, child_id):

        folderTable = Table('folder', self.metadata, autoload=True)

        s = select([folderTable.c.parent_id, folderTable.c.name])

        s = s.where(folderTable.c.id == child_id)

        rp = self.conn.execute(s)

        parent_id, foldername = rp.fetchone()

        if not parent_id:

            return ''

        else:

            return '%s/%s' %(self.retrieve_path(parent_id), foldername)

    def retrieve_current_nodes(self):

        fileheader = Table('fileheader', self.metadata, autoload=True)

        filebody = Table('filebody', self.metadata, autoload=True)

        folder = Table('folder', self.metadata, autoload=True)

        gss_user = Table('gss_user', self.metadata, autoload=True)

        j = filebody.join(fileheader, filebody.c.id == fileheader.c.currentbody_id)

        j = j.join(folder, fileheader.c.folder_id == folder.c.id)

        j = j.join(gss_user, fileheader.c.owner_id == gss_user.c.id)

        s = select([gss_user.c.username,  fileheader.c.id, fileheader.c.folder_id,

                    fileheader.c.name,  fileheader.c.deleted, filebody.c.storedfilepath,

                    filebody.c.mimetype], from_obj=j)

        s = s.limit(1)

        rp = self.conn.execute(s)

        object = rp.fetchone()

        while object:

            yield object

            object = rp.fetchone()

        rp.close()

    def retrieve_node_versions(self, header_id):

        filebody = Table('filebody', self.metadata, autoload=True)

        gss_user = Table('gss_user', self.metadata, autoload=True)

        j = filebody.join(gss_user, filebody.c.modifiedby_id == gss_user.c.id)

        s = select([filebody.c.filesize, gss_user.c.username,

                    filebody.c.storedfilepath, filebody.c.mimetype,

                    filebody.c.modificationdate], from_obj=j)

        s = s.where(filebody.c.header_id == header_id)

        s = s.order_by(filebody.c.version)

        rp = self.conn.execute(s)

        version = rp.fetchone()

        while version:

            yield version, rp.rowcount

            version = rp.fetchone()

        rp.close()

    def retrieve_metadata(self, header_id):

        filetag = Table('filetag', self.metadata, autoload=True)

        s = filetag.select(filetag.c.fileid == header_id)

        rp = self.conn.execute(s)

        tag = rp.fetchone()

        while tag:

            yield tag

            tag = tp.fetchone()

        rp.close()

    def handle_deleted(self):

        pass

if __name__ == "__main__":

    old_db = ''

    db = ''

    f = open('fixdates.sql', 'w')

    ot = ObjectMigration(old_db, db, f)

    ot.create_objects()

    f.close()