Synnefo

#!/usr/bin/env python

# Copyright 2011 GRNET S.A. All rights reserved.

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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 pithos.backends.lib.sqlalchemy.dbwrapper import DBWrapper

from lib.transfer import upload

from lib.hashmap import HashMap, file_read_iterator

from lib.client import Fault

from lib.migrate import Migration

import json

import os

import sys

import hashlib

import mimetypes

class ObjectMigration(Migration):

    def __init__(self, old_db):

        Migration.__init__(self, old_db)

        self.wrapper = ClientWrapper(self.backend)

        params = {'wrapper': DBWrapper(self.backend.db)}

        self.node = Node(**params)

    def create_default_containers(self):

        users = PithosUser.objects.all()

        for u in users:

            print '#', u.uniq

            try:

                self.wrapper.create_container('pithos', u.uniq)

                self.wrapper.create_container('trash', u.uniq)

            except NameError, e:

                pass

    def get_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.get_path(parent_id), foldername)

    def create_object(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:

                self.wrapper.create_directory_marker('pithos', obj, username)

            except NameError, e:

                pass

        self.wrapper.set_account(username)

        prefix = '%s/' %path if path else ''

        print '#', filepath, container, prefix, name, mimetype

        return upload(self.wrapper, filepath, container, prefix, name, mimetype)

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

        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], from_obj=j)

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

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

        rp = self.conn.execute(s)

        versions = rp.fetchall()

        print '#', len(versions)

        rp.close()

        i = 0

        for size, modyfied_by  in versions:

            cluster = CLUSTER_HISTORY if i < len(versions) - 1 else CLUSTER_NORMAL

            cluster = cluster if not deleted else CLUSTER_DELETED

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

            self.node.version_create(*args)

            i += 1

    def create_objects(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)

        rp = self.conn.execute(s)

        objects = rp.fetchall()

        for username, headerid, folderid, filename, deleted, filepath, mimetype in objects:

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

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

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

            #filepath = '/Users/butters/Downloads/torvalds-linux-0f86267'

            vserial = self.create_object(username, container, object, filepath, mimetype)

            nodeid = self.node.version_get_properties(vserial, keys=('node',))[0]

            self.create_history(username, headerid, nodeid, deleted)

            self.node.version_remove(vserial)

            #self.set_metadata()

            #self.set_public()

            #self.statistics()

            #self.set_permissions()

    def handle_deleted(self):

        pass

    def upload_dir(self, dir, prefix, user, container):

        for f in os.listdir(dir):

            fullpath = '%s/%s' %(dir, f)

            if os.path.isfile(fullpath):

                type = mimetypes.guess_type(fullpath)[0]

                name = '/'.join(fullpath.split(prefix)[1:])

                print '@', user, container, name, fullpath, type

                self.create_object(user, container, name, fullpath, type)

            else: self.upload_dir(fullpath, prefix, user, container)

class ClientWrapper(object):

    """Wraps client methods used by transfer.upload()

    to ModularBackend methods"""

    def __init__(self, backend):

        self.backend = backend

        self.block_size = self.backend.block_size

        self.block_hash = self.backend.hash_algorithm

    def set_account(self, account):

        self.account = account

    def create_container(self, container, account=None, **meta):

        self.backend.put_container(account, account, container, meta)

    def create_directory_marker(self, container, object, account=None):

        md5 = hashlib.md5()

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

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

        self.backend.update_object_hashmap(account, account, container, object, 0, [], meta)   

    def create_object_by_hashmap(self, container, object, map, mimetype=None):

        hashmap = HashMap(self.block_size, self.block_hash)

        for h in map['hashes']:

            hashmap.append(h)

        meta = {'hash':hexlify(hashmap.hash())}

        if mimetype:

            meta['content-type'] = mimetype

        size = map['bytes']

        try:

            args = [self.account, self.account, container, object, size,  map['hashes'], meta]

            return self.backend.update_object_hashmap(*args)

        except IndexError, ie:

            fault = Fault(ie.data, 409)

            raise fault

    def update_container_data(self, container, f):

        #just put the blocks

        for block in file_read_iterator(f, self.block_size):

            self.backend.put_block(block)

    def retrieve_container_metadata(self, container):

        return {'x-container-block-size':self.block_size,

                'x-container-block-hash':self.block_hash}

if __name__ == "__main__":

    old_db = ''

    ot = ObjectMigration(old_db)

    #ot.create_default_containers()

    #ot.create_objects()

    p = ''

    ot.upload_dir(p, p, 'chstath', 'linux')