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#!/usr/bin/env python
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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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# 
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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# 
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#   1. Redistributions of source code must retain the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer.
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# 
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#   2. Redistributions in binary form must reproduce the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer in the documentation and/or other materials
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#      provided with the distribution.
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# 
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# 
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from sqlalchemy import Table
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from sqlalchemy.sql import select
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from pithos.im.models import User
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from migrate import Migration
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import base64
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class UserMigration(Migration):
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    def __init__(self, db):
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        Migration.__init__(self, db)
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        self.gss_users = Table('gss_user', self.metadata, autoload=True)
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    def execute(self):
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        for u in self.retrieve_users():
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            user = User()
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            user.pk = u['id']
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            user.uniq = u['username']
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            user.realname = u['name']
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            user.affiliation = u['homeorganization'] if u['homeorganization'] else ''
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            user.auth_token = base64.b64encode(u['authtoken'])
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            user.auth_token_created = u['creationdate']
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            user.auth_token_expires = u['authtokenexpirydate']
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            user.created = u['creationdate']
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            user.updated = u['modificationdate']
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            user.email = u['email']
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            user.active = 'ACTIVE' if u['active'] else 'SUSPENDED'
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            print '#', user
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            user.save(update_timestamps=False)
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            #create user groups
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            for (owner, group, members) in self.retrieve_groups(u['username']):
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                self.backend.permissions.group_addmany(owner, group, members)
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    def retrieve_users(self):
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        s = self.gss_users.select()
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        rp = self.conn.execute(s)
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        user = rp.fetchone()
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        while user:
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            yield user
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            user = rp.fetchone()
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        rp.close()
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    def retrieve_groups(self, owner):
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        gss_group = Table('gss_group', self.metadata, autoload=True)
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        gss_user = Table('gss_user', self.metadata, autoload=True)
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        group_user = Table('gss_group_gss_user', self.metadata, autoload=True)
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        j1 = gss_group.join(gss_user, gss_group.c.owner_id == gss_user.c.id)
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        j2 = group_user.join(gss_user, group_user.c.members_id == gss_user.c.id)
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        s = select([gss_group.c.id, gss_group.c.name, gss_user.c.username], from_obj=j1)
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        s = s.where(gss_user.c.username == owner)
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        rp = self.conn.execute(s)
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        gr = rp.fetchone()
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        while gr:
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            id, group, owner = gr
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            s = select([gss_user.c.username], from_obj=j2)
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            s = s.where(group_user.c.groupsmember_id == id)
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            rp2 = self.conn.execute(s)
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            members = rp2.fetchall()
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            rp2.close()
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            yield owner, group, (m[0] for m in members)
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            gr = rp.fetchone()
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        rp.close()
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if __name__ == "__main__":
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    db = ''
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    m = UserMigration(db)
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    m.execute()