~openerp-chinese-team/openobject-addons/V6

# -*- coding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#    Copyright (C) 2004-2010 Tiny SPRL (<http://tiny.be>).
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

from datetime import datetime
from osv import osv, fields
from tools.translate import _
import netsvc
import time
import tools


#----------------------------------------------------------
# Work Centers
#----------------------------------------------------------
# capacity_hour : capacity per hour. default: 1.0.
#          Eg: If 5 concurrent operations at one time: capacity = 5 (because 5 employees)
# unit_per_cycle : how many units are produced for one cycle

class mrp_workcenter(osv.osv):
    _name = 'mrp.workcenter'
    _description = 'Work Center'
    _inherits = {'resource.resource':"resource_id"}
    _columns = {
        'note': fields.text('Description', help="Description of the workcenter. Explain here what's a cycle according to this workcenter."),
        'capacity_per_cycle': fields.float('Capacity per Cycle', help="Number of operations this workcenter can do in parallel. If this workcenter represents a team of 5 workers, the capacity per cycle is 5."),
        'time_cycle': fields.float('Time for 1 cycle (hour)', help="Time in hours for doing one cycle."),
        'time_start': fields.float('Time before prod.', help="Time in hours for the setup."),
        'time_stop': fields.float('Time after prod.', help="Time in hours for the cleaning."),
        'costs_hour': fields.float('Cost per hour', help="Specify Cost of Workcenter per hour."),
        'costs_hour_account_id': fields.many2one('account.analytic.account', 'Hour Account', domain=[('type','<>','view')],
            help="Complete this only if you want automatic analytic accounting entries on production orders."),
        'costs_cycle': fields.float('Cost per cycle', help="Specify Cost of Workcenter per cycle."),
        'costs_cycle_account_id': fields.many2one('account.analytic.account', 'Cycle Account', domain=[('type','<>','view')],
            help="Complete this only if you want automatic analytic accounting entries on production orders."),
        'costs_journal_id': fields.many2one('account.analytic.journal', 'Analytic Journal'),
        'costs_general_account_id': fields.many2one('account.account', 'General Account', domain=[('type','<>','view')]),
        'resource_id': fields.many2one('resource.resource','Resource', ondelete='cascade', required=True),
    }
    _defaults = {
        'capacity_per_cycle': 1.0,
        'resource_type': 'material',
     }
mrp_workcenter()


class mrp_routing(osv.osv):
    """
    For specifying the routings of workcenters.
    """
    _name = 'mrp.routing'
    _description = 'Routing'
    _columns = {
        'name': fields.char('Name', size=64, required=True),
        'active': fields.boolean('Active', help="If the active field is set to False, it will allow you to hide the routing without removing it."),
        'code': fields.char('Code', size=8),

        'note': fields.text('Description'),
        'workcenter_lines': fields.one2many('mrp.routing.workcenter', 'routing_id', 'Work Centers'),

        'location_id': fields.many2one('stock.location', 'Production Location',
            help="Keep empty if you produce at the location where the finished products are needed." \
                "Set a location if you produce at a fixed location. This can be a partner location " \
                "if you subcontract the manufacturing operations."
        ),
        'company_id': fields.many2one('res.company', 'Company'),
    }
    _defaults = {
        'active': lambda *a: 1,
        'company_id': lambda self, cr, uid, context: self.pool.get('res.company')._company_default_get(cr, uid, 'mrp.routing', context=context)
    }
mrp_routing()

class mrp_routing_workcenter(osv.osv):
    """
    Defines working cycles and hours of a workcenter using routings.
    """
    _name = 'mrp.routing.workcenter'
    _description = 'Workcenter Usage'
    _columns = {
        'workcenter_id': fields.many2one('mrp.workcenter', 'Work Center', required=True),
        'name': fields.char('Name', size=64, required=True),
        'sequence': fields.integer('Sequence', help="Gives the sequence order when displaying a list of routing workcenters."),
        'cycle_nbr': fields.float('Number of Cycles', required=True,
            help="Number of operations this workcenter can do."),
        'hour_nbr': fields.float('Number of Hours', required=True, help="Time in hours for doing one cycle."),
        'routing_id': fields.many2one('mrp.routing', 'Parent Routing', select=True, ondelete='cascade',
             help="Routing indicates all the workcenters used, for how long and/or cycles." \
                "If Routing is indicated then,the third tab of a production order (workcenters) will be automatically pre-completed."),
        'note': fields.text('Description'),
        'company_id': fields.related('routing_id', 'company_id', type='many2one', relation='res.company', string='Company'),
    }
    _defaults = {
        'cycle_nbr': lambda *a: 1.0,
        'hour_nbr': lambda *a: 0.0,
    }
mrp_routing_workcenter()

class mrp_bom(osv.osv):
    """
    Defines bills of material for a product.
    """
    _name = 'mrp.bom'
    _description = 'Bill of Material'

    def _child_compute(self, cr, uid, ids, name, arg, context={}):
        """ Gets child bom.
        @param self: The object pointer
        @param cr: The current row, from the database cursor,
        @param uid: The current user ID for security checks
        @param ids: List of selected IDs
        @param name: Name of the field
        @param arg: User defined argument
        @param context: A standard dictionary for contextual values
        @return:  Dictionary of values
        """
        result = {}
        bom_obj = self.pool.get('mrp.bom')
        bom_id = context and context.get('active_id', False) or False
        cr.execute('select id from mrp_bom')
        if all(bom_id != r[0] for r in cr.fetchall()):
            ids.sort()
            bom_id = ids[0]
        bom_parent = bom_obj.browse(cr, uid, bom_id)
        for bom in self.browse(cr, uid, ids, context=context):
            if (bom_parent) or (bom.id == bom_id):
                result[bom.id] = map(lambda x: x.id, bom.bom_lines)
            else:
                result[bom.id] = []
            if bom.bom_lines:
                continue
            ok = ((name=='child_complete_ids') and (bom.product_id.supply_method=='produce'))
            if (bom.type=='phantom' or ok):
                sids = bom_obj.search(cr, uid, [('bom_id','=',False),('product_id','=',bom.product_id.id)])
                if sids:
                    bom2 = bom_obj.browse(cr, uid, sids[0], context=context)
                    result[bom.id] += map(lambda x: x.id, bom2.bom_lines)

        return result

    def _compute_type(self, cr, uid, ids, field_name, arg, context):
        """ Sets particular method for the selected bom type.
        @param field_name: Name of the field
        @param arg: User defined argument
        @return:  Dictionary of values
        """
        res = dict(map(lambda x: (x,''), ids))
        for line in self.browse(cr, uid, ids):
            if line.type == 'phantom' and not line.bom_id:
                res[line.id] = 'set'
                continue
            if line.bom_lines or line.type == 'phantom':
                continue
            if line.product_id.supply_method == 'produce':
                if line.product_id.procure_method == 'make_to_stock':
                    res[line.id] = 'stock'
                else:
                    res[line.id] = 'order'
        return res

    _columns = {
        'name': fields.char('Name', size=64, required=True),
        'code': fields.char('Reference', size=16),
        'active': fields.boolean('Active', help="If the active field is set to False, it will allow you to hide the bills of material without removing it."),
        'type': fields.selection([('normal','Normal BoM'),('phantom','Sets / Phantom')], 'BoM Type', required=True,
                                 help= "If a sub-product is used in several products, it can be useful to create its own BoM. "\
                                 "Though if you don't want separated production orders for this sub-product, select Set/Phantom as BoM type. "\
                                 "If a Phantom BoM is used for a root product, it will be sold and shipped as a set of components, instead of being produced."),
        'method': fields.function(_compute_type, string='Method', method=True, type='selection', selection=[('',''),('stock','On Stock'),('order','On Order'),('set','Set / Pack')]),
        'date_start': fields.date('Valid From', help="Validity of this BoM or component. Keep empty if it's always valid."),
        'date_stop': fields.date('Valid Until', help="Validity of this BoM or component. Keep empty if it's always valid."),
        'sequence': fields.integer('Sequence', help="Gives the sequence order when displaying a list of bills of material."),
        'position': fields.char('Internal Reference', size=64, help="Reference to a position in an external plan."),
        'product_id': fields.many2one('product.product', 'Product', required=True),
        'product_uos_qty': fields.float('Product UOS Qty'),
        'product_uos': fields.many2one('product.uom', 'Product UOS', help="Product UOS (Unit of Sale) is the unit of measurement for the invoicing and promotion of stock."),
        'product_qty': fields.float('Product Qty', required=True),
        'product_uom': fields.many2one('product.uom', 'Product UOM', required=True, help="UoM (Unit of Measure) is the unit of measurement for the inventory control"),
        'product_rounding': fields.float('Product Rounding', help="Rounding applied on the product quantity."),
        'product_efficiency': fields.float('Manufacturing Efficiency', required=True, help="A factor of 0.9 means a loss of 10% within the production process."),
        'bom_lines': fields.one2many('mrp.bom', 'bom_id', 'BoM Lines'),
        'bom_id': fields.many2one('mrp.bom', 'Parent BoM', ondelete='cascade', select=True),
        'routing_id': fields.many2one('mrp.routing', 'Routing', help="The list of operations (list of workcenters) to produce the finished product. The routing is mainly used to compute workcenter costs during operations and to plan future loads on workcenters based on production planning."),
        'property_ids': fields.many2many('mrp.property', 'mrp_bom_property_rel', 'bom_id','property_id', 'Properties'),
        'revision_ids': fields.one2many('mrp.bom.revision', 'bom_id', 'BoM Revisions'),
        'child_complete_ids': fields.function(_child_compute, relation='mrp.bom', method=True, string="BoM Hierarchy", type='many2many'),
        'company_id': fields.many2one('res.company','Company',required=True),
    }
    _defaults = {
        'active': lambda *a: 1,
        'product_efficiency': lambda *a: 1.0,
        'product_qty': lambda *a: 1.0,
        'product_rounding': lambda *a: 0.0,
        'type': lambda *a: 'normal',
        'company_id': lambda self,cr,uid,c: self.pool.get('res.company')._company_default_get(cr, uid, 'mrp.bom', context=c),
    }
    _order = "sequence"
    _sql_constraints = [
        ('bom_qty_zero', 'CHECK (product_qty>0)',  'All product quantities must be greater than 0.\n' \
            'You should install the mrp_subproduct module if you want to manage extra products on BoMs !'),
    ]

    def _check_recursion(self, cr, uid, ids):
        level = 100
        while len(ids):
            cr.execute('select distinct bom_id from mrp_bom where id IN %s',(tuple(ids),))
            ids = filter(None, map(lambda x:x[0], cr.fetchall()))
            if not level:
                return False
            level -= 1
        return True
    _constraints = [
        (_check_recursion, 'Error ! You can not create recursive BoM.', ['parent_id'])
    ]


    def onchange_product_id(self, cr, uid, ids, product_id, name, context={}):
        """ Changes UoM and name if product_id changes.
        @param name: Name of the field
        @param product_id: Changed product_id
        @return:  Dictionary of changed values
        """
        if product_id:
            prod = self.pool.get('product.product').browse(cr, uid, [product_id])[0]
            v = {'product_uom': prod.uom_id.id}
            if not name:
                v['name'] = prod.name
            return {'value': v}
        return {}

    def _bom_find(self, cr, uid, product_id, product_uom, properties=[]):
        """ Finds BoM for particular product and product uom.
        @param product_id: Selected product.
        @param product_uom: Unit of measure of a product.
        @param properties: List of related properties.
        @return: False or BoM id.
        """
        cr.execute('select id from mrp_bom where product_id=%s and bom_id is null order by sequence', (product_id,))
        ids = map(lambda x: x[0], cr.fetchall())
        max_prop = 0
        result = False
        for bom in self.pool.get('mrp.bom').browse(cr, uid, ids):
            prop = 0
            for prop_id in bom.property_ids:
                if prop_id.id in properties:
                    prop += 1
            if (prop > max_prop) or ((max_prop == 0) and not result):
                result = bom.id
                max_prop = prop
        return result

    def _bom_explode(self, cr, uid, bom, factor, properties=[], addthis=False, level=0):
        """ Finds Products and Workcenters for related BoM for manufacturing order.
        @param bom: BoM of particular product.
        @param factor: Factor of product UoM.
        @param properties: A List of properties Ids.
        @param addthis: If BoM found then True else False.
        @param level: Depth level to find BoM lines starts from 10.
        @return: result: List of dictionaries containing product details.
                 result2: List of dictionaries containing workcenter details.
        """
        factor = factor / (bom.product_efficiency or 1.0)
        factor = rounding(factor, bom.product_rounding)
        if factor < bom.product_rounding:
            factor = bom.product_rounding
        result = []
        result2 = []
        phantom = False
        if bom.type == 'phantom' and not bom.bom_lines:
            newbom = self._bom_find(cr, uid, bom.product_id.id, bom.product_uom.id, properties)
            if newbom:
                res = self._bom_explode(cr, uid, self.browse(cr, uid, [newbom])[0], factor*bom.product_qty, properties, addthis=True, level=level+10)
                result = result + res[0]
                result2 = result2 + res[1]
                phantom = True
            else:
                phantom = False
        if not phantom:
            if addthis and not bom.bom_lines:
                result.append(
                {
                    'name': bom.product_id.name,
                    'product_id': bom.product_id.id,
                    'product_qty': bom.product_qty * factor,
                    'product_uom': bom.product_uom.id,
                    'product_uos_qty': bom.product_uos and bom.product_uos_qty * factor or False,
                    'product_uos': bom.product_uos and bom.product_uos.id or False,
                })
            if bom.routing_id:
                for wc_use in bom.routing_id.workcenter_lines:
                    wc = wc_use.workcenter_id
                    d, m = divmod(factor, wc_use.workcenter_id.capacity_per_cycle)
                    mult = (d + (m and 1.0 or 0.0))
                    cycle = mult * wc_use.cycle_nbr
                    result2.append({
                        'name': tools.ustr(wc_use.name) + ' - '  + tools.ustr(bom.product_id.name),
                        'workcenter_id': wc.id,
                        'sequence': level+(wc_use.sequence or 0),
                        'cycle': cycle,
                        'hour': float(wc_use.hour_nbr*mult + ((wc.time_start or 0.0)+(wc.time_stop or 0.0)+cycle*(wc.time_cycle or 0.0)) * (wc.time_efficiency or 1.0)),
                    })
            for bom2 in bom.bom_lines:
                res = self._bom_explode(cr, uid, bom2, factor, properties, addthis=True, level=level+10)
                result = result + res[0]
                result2 = result2 + res[1]
        return result, result2

mrp_bom()

class mrp_bom_revision(osv.osv):
    _name = 'mrp.bom.revision'
    _description = 'Bill of Material Revision'
    _columns = {
        'name': fields.char('Modification name', size=64, required=True),
        'description': fields.text('Description'),
        'date': fields.date('Modification Date'),
        'indice': fields.char('Revision', size=16),
        'last_indice': fields.char('last indice', size=64),
        'author_id': fields.many2one('res.users', 'Author'),
        'bom_id': fields.many2one('mrp.bom', 'BoM', select=True),
    }

    _defaults = {
        'author_id': lambda x, y, z, c: z,
        'date': lambda *a: time.strftime('%Y-%m-%d'),
    }

mrp_bom_revision()

def rounding(f, r):
    if not r:
        return f
    return round(f / r) * r

class mrp_production(osv.osv):
    """
    Production Orders / Manufacturing Orders
    """
    _name = 'mrp.production'
    _description = 'Manufacturing Order'
    _date_name  = 'date_planned'

    def _production_calc(self, cr, uid, ids, prop, unknow_none, context={}):
        """ Calculates total hours and total no. of cycles for a production order.
        @param prop: Name of field.
        @param unknow_none:
        @return: Dictionary of values.
        """
        result = {}
        for prod in self.browse(cr, uid, ids, context=context):
            result[prod.id] = {
                'hour_total': 0.0,
                'cycle_total': 0.0,
            }
            for wc in prod.workcenter_lines:
                result[prod.id]['hour_total'] += wc.hour
                result[prod.id]['cycle_total'] += wc.cycle
        return result

    def _production_date_end(self, cr, uid, ids, prop, unknow_none, context={}):
        """ Finds production end date.
        @param prop: Name of field.
        @param unknow_none:
        @return: Dictionary of values.
        """
        result = {}
        for prod in self.browse(cr, uid, ids, context=context):
            result[prod.id] = prod.date_planned
        return result

    def _production_date(self, cr, uid, ids, prop, unknow_none, context={}):
        """ Finds production planned date.
        @param prop: Name of field.
        @param unknow_none:
        @return: Dictionary of values.
        """
        result = {}
        for prod in self.browse(cr, uid, ids, context=context):
            result[prod.id] = prod.date_planned[:10]
        return result

    _columns = {
        'name': fields.char('Reference', size=64, required=True),
        'origin': fields.char('Source Document', size=64, help="Reference of the document that generated this production order request."),
        'priority': fields.selection([('0','Not urgent'),('1','Normal'),('2','Urgent'),('3','Very Urgent')], 'Priority'),

        'product_id': fields.many2one('product.product', 'Product', required=True, ),
        'product_qty': fields.float('Product Qty', required=True, states={'draft':[('readonly',False)]}, readonly=True),
        'product_uom': fields.many2one('product.uom', 'Product UOM', required=True, states={'draft':[('readonly',False)]}, readonly=True),
        'product_uos_qty': fields.float('Product UoS Qty', states={'draft':[('readonly',False)]}, readonly=True),
        'product_uos': fields.many2one('product.uom', 'Product UoS', states={'draft':[('readonly',False)]}, readonly=True),

        'location_src_id': fields.many2one('stock.location', 'Raw Materials Location', required=True,
            help="Location where the system will look for components."),
        'location_dest_id': fields.many2one('stock.location', 'Finished Products Location', required=True,
            help="Location where the system will stock the finished products."),

        'date_planned_end': fields.function(_production_date_end, method=True, type='date', string='Scheduled End Date'),
        'date_planned_date': fields.function(_production_date, method=True, type='date', string='Scheduled Date'),
        'date_planned': fields.datetime('Scheduled date', required=True, select=1),
        'date_start': fields.datetime('Start Date'),
        'date_finished': fields.datetime('End Date'),

        'bom_id': fields.many2one('mrp.bom', 'Bill of Material', domain=[('bom_id','=',False)]),
        'routing_id': fields.many2one('mrp.routing', string='Routing', on_delete='set null', help="The list of operations (list of workcenters) to produce the finished product. The routing is mainly used to compute workcenter costs during operations and to plan future loads on workcenters based on production plannification."),

        'picking_id': fields.many2one('stock.picking', 'Picking list', readonly=True,
            help="This is the internal picking list that brings the finished product to the production plan"),
        'move_prod_id': fields.many2one('stock.move', 'Move product', readonly=True),
        'move_lines': fields.many2many('stock.move', 'mrp_production_move_ids', 'production_id', 'move_id', 'Products to Consume', domain=[('state','not in', ('done', 'cancel'))], states={'done':[('readonly',True)]}),
        'move_lines2': fields.many2many('stock.move', 'mrp_production_move_ids', 'production_id', 'move_id', 'Consumed Products', domain=[('state','in', ('done', 'cancel'))]),
        'move_created_ids': fields.one2many('stock.move', 'production_id', 'Moves Created', domain=[('state','not in', ('done', 'cancel'))], states={'done':[('readonly',True)]}),
        'move_created_ids2': fields.one2many('stock.move', 'production_id', 'Moves Created', domain=[('state','in', ('done', 'cancel'))]),
        'product_lines': fields.one2many('mrp.production.product.line', 'production_id', 'Scheduled goods'),
        'workcenter_lines': fields.one2many('mrp.production.workcenter.line', 'production_id', 'Work Centers Utilisation'),
        'state': fields.selection([('draft','Draft'),('picking_except', 'Picking Exception'),('confirmed','Waiting Goods'),('ready','Ready to Produce'),('in_production','In Production'),('cancel','Cancelled'),('done','Done')],'State', readonly=True,
                                    help='When the production order is created the state is set to \'Draft\'.\n If the order is confirmed the state is set to \'Waiting Goods\'.\n If any exceptions are there, the state is set to \'Picking Exception\'.\
                                    \nIf the stock is available then the state is set to \'Ready to Produce\'.\n When the production gets started then the state is set to \'In Production\'.\n When the production is over, the state is set to \'Done\'.'),
        'hour_total': fields.function(_production_calc, method=True, type='float', string='Total Hours', multi='workorder', store=True),
        'cycle_total': fields.function(_production_calc, method=True, type='float', string='Total Cycles', multi='workorder', store=True),
        'company_id': fields.many2one('res.company','Company',required=True),
    }
    _defaults = {
        'priority': lambda *a: '1',
        'state': lambda *a: 'draft',
        'date_planned': lambda *a: time.strftime('%Y-%m-%d %H:%M:%S'),
        'product_qty':  lambda *a: 1.0,
        'name': lambda x, y, z, c: x.pool.get('ir.sequence').get(y, z, 'mrp.production') or '/',
        'company_id': lambda self, cr, uid, c: self.pool.get('res.company')._company_default_get(cr, uid, 'mrp.production', context=c),
    }
    _order = 'priority desc, date_planned asc';

    def _check_qty(self, cr, uid, ids):
        orders = self.browse(cr, uid, ids)
        for order in orders:
            if order.product_qty <= 0:
                return False
        return True

    _constraints = [
        (_check_qty, 'Order quantity cannot be negative or zero !', ['product_qty']),
    ]

    def unlink(self, cr, uid, ids, context=None):
        productions = self.read(cr, uid, ids, ['state'])
        unlink_ids = []
        for s in productions:
            if s['state'] in ['draft','cancel']:
                unlink_ids.append(s['id'])
            else:
                raise osv.except_osv(_('Invalid action !'), _('Cannot delete Production Order(s) which are in %s State!') % s['state'])
        return osv.osv.unlink(self, cr, uid, unlink_ids, context=context)

    def copy(self, cr, uid, id, default=None, context=None):
        if default is None:
            default = {}
        default.update({
            'name': self.pool.get('ir.sequence').get(cr, uid, 'mrp.production'),
            'move_lines' : [],
            'move_lines2' : [],
            'move_created_ids' : [],
            'move_created_ids2' : [],
            'product_lines' : [],
            'picking_id': False
        })
        return super(mrp_production, self).copy(cr, uid, id, default, context)

    def location_id_change(self, cr, uid, ids, src, dest, context={}):
        """ Changes destination location if source location is changed.
        @param src: Source location id.
        @param dest: Destination location id.
        @return: Dictionary of values.
        """
        if dest:
            return {}
        if src:
            return {'value': {'location_dest_id': src}}
        return {}

    def product_id_change(self, cr, uid, ids, product_id, context=None):
        """ Finds UoM of changed product.
        @param product_id: Id of changed product.
        @return: Dictionary of values.
        """
        if not product_id:
            return {'value': {
                'product_uom': False,
                'bom_id': False,
                'routing_id': False
            }}
        bom_obj = self.pool.get('mrp.bom')
        product = self.pool.get('product.product').browse(cr, uid, product_id, context=context)
        bom_id = bom_obj._bom_find(cr, uid, product.id, product.uom_id and product.uom_id.id, [])
        routing_id = False
        if bom_id:
            bom_point = bom_obj.browse(cr, uid, bom_id, context=context)
            routing_id = bom_point.routing_id.id or False
        result = {
            'product_uom': product.uom_id and product.uom_id.id or False,
            'bom_id': bom_id,
            'routing_id': routing_id
        }
        return {'value': result}

    def bom_id_change(self, cr, uid, ids, bom_id, context=None):
        """ Finds routing for changed BoM.
        @param product: Id of product.
        @return: Dictionary of values.
        """
        if not bom_id:
            return {'value': {
                'routing_id': False
            }}
        bom_pool = self.pool.get('mrp.bom')
        bom_point = bom_pool.browse(cr, uid, bom_id, context=context)
        routing_id = bom_point.routing_id.id or False
        result = {
            'routing_id': routing_id
        }
        return {'value': result}

    def action_picking_except(self, cr, uid, ids):
        """ Changes the state to Exception.
        @return: True
        """
        self.write(cr, uid, ids, {'state': 'picking_except'})
        return True

    def action_compute(self, cr, uid, ids, properties=[]):
        """ Computes bills of material of a product.
        @param properties: List containing dictionaries of properties.
        @return: No. of products.
        """
        results = []
        bom_obj = self.pool.get('mrp.bom')
        prod_line_obj = self.pool.get('mrp.production.product.line')
        workcenter_line_obj = self.pool.get('mrp.production.workcenter.line')
        for production in self.browse(cr, uid, ids):
            cr.execute('delete from mrp_production_product_line where production_id=%s', (production.id,))
            cr.execute('delete from mrp_production_workcenter_line where production_id=%s', (production.id,))
            bom_point = production.bom_id
            bom_id = production.bom_id.id
            if not bom_point:
                bom_id = bom_obj._bom_find(cr, uid, production.product_id.id, production.product_uom.id, properties)
                if bom_id:
                    bom_point = bom_obj.browse(cr, uid, bom_id)
                    routing_id = bom_point.routing_id.id or False
                    self.write(cr, uid, [production.id], {'bom_id': bom_id, 'routing_id': routing_id})

            if not bom_id:
                raise osv.except_osv(_('Error'), _("Couldn't find bill of material for product"))

            factor = production.product_qty * production.product_uom.factor / bom_point.product_uom.factor
            res = bom_obj._bom_explode(cr, uid, bom_point, factor / bom_point.product_qty, properties)
            results = res[0]
            results2 = res[1]
            for line in results:
                line['production_id'] = production.id
                prod_line_obj.create(cr, uid, line)
            for line in results2:
                line['production_id'] = production.id
                workcenter_line_obj.create(cr, uid, line)
        return len(results)

    def action_cancel(self, cr, uid, ids):
        """ Cancels the production order and related stock moves.
        @return: True
        """
        move_obj = self.pool.get('stock.move')
        for production in self.browse(cr, uid, ids):
            if production.move_created_ids:
                move_obj.action_cancel(cr, uid, [x.id for x in production.move_created_ids])
            move_obj.action_cancel(cr, uid, [x.id for x in production.move_lines])
        self.write(cr, uid, ids, {'state': 'cancel'})
        return True

    def action_ready(self, cr, uid, ids):
        """ Changes the production state to Ready and location id of stock move.
        @return: True
        """
        move_obj = self.pool.get('stock.move')
        self.write(cr, uid, ids, {'state': 'ready'})

        for (production_id,name) in self.name_get(cr, uid, ids):
            production = self.browse(cr, uid, production_id)
            if production.move_prod_id:
                move_obj.write(cr, uid, [production.move_prod_id.id],
                        {'location_id': production.location_dest_id.id})

            message = _("Manufacturing order '%s' is ready to produce.") % ( name,)
            self.log(cr, uid, production_id, message)
        return True

    def action_production_end(self, cr, uid, ids):
        """ Changes production state to Finish and writes finished date.
        @return: True
        """
        for production in self.browse(cr, uid, ids):
            self._costs_generate(cr, uid, production)
        return self.write(cr, uid, ids, {'state': 'done', 'date_finished': time.strftime('%Y-%m-%d %H:%M:%S')})

    def test_production_done(self, cr, uid, ids):
        """ Tests whether production is done or not.
        @return: True or False
        """
        res = True
        for production in self.browse(cr, uid, ids):
            if production.move_lines:
               res = False

            if production.move_created_ids:
               res = False
        return res

    def action_produce(self, cr, uid, production_id, production_qty, production_mode, context=None):
        """ To produce final product based on production mode (consume/consume&produce).
        If Production mode is consume, all stock move lines of raw materials will be done/consumed.
        If Production mode is consume & produce, all stock move lines of raw materials will be done/consumed
        and stock move lines of final product will be also done/produced.
        @param production_id: the ID of mrp.production object
        @param production_qty: specify qty to produce
        @param production_mode: specify production mode (consume/consume&produce).
        @return: True
        """

        stock_mov_obj = self.pool.get('stock.move')
        production = self.browse(cr, uid, production_id)

        final_product_todo = []

        produced_qty = 0
        if production_mode == 'consume_produce':
            produced_qty = production_qty

        for produced_product in production.move_created_ids2:
            if (produced_product.scrapped) or (produced_product.product_id.id<>production.product_id.id):
                continue
            produced_qty += produced_product.product_qty

        if production_mode in ['consume','consume_produce']:
            consumed_products = {}
            check = {}
            scrapped = map(lambda x:x.scrapped,production.move_lines2).count(True)

            for consumed_product in production.move_lines2:
                consumed = consumed_product.product_qty
                if consumed_product.scrapped:
                    continue
                if not consumed_products.get(consumed_product.product_id.id, False):
                    consumed_products[consumed_product.product_id.id] = consumed_product.product_qty
                    check[consumed_product.product_id.id] = 0
                for f in production.product_lines:
                    if f.product_id.id == consumed_product.product_id.id:
                        if (len(production.move_lines2) - scrapped) > len(production.product_lines):
                            check[consumed_product.product_id.id] += consumed_product.product_qty
                            consumed = check[consumed_product.product_id.id]
                        rest_consumed = produced_qty * f.product_qty / production.product_qty - consumed
                        consumed_products[consumed_product.product_id.id] = rest_consumed

            for raw_product in production.move_lines:
                for f in production.product_lines:
                    if f.product_id.id == raw_product.product_id.id:
                        consumed_qty = consumed_products.get(raw_product.product_id.id, 0)
                        if consumed_qty == 0:
                            consumed_qty = production_qty * f.product_qty / production.product_qty
                        if consumed_qty > 0:
                            stock_mov_obj.action_consume(cr, uid, [raw_product.id], consumed_qty, production.location_src_id.id, context=context)

        if production_mode == 'consume_produce':
            # To produce remaining qty of final product
            vals = {'state':'confirmed'}
            final_product_todo = [x.id for x in production.move_created_ids]
            stock_mov_obj.write(cr, uid, final_product_todo, vals)
            produced_products = {}
            for produced_product in production.move_created_ids2:
                if produced_product.scrapped:
                    continue
                if not produced_products.get(produced_product.product_id.id, False):
                    produced_products[produced_product.product_id.id] = 0
                produced_products[produced_product.product_id.id] += produced_product.product_qty

            for produce_product in production.move_created_ids:
                produced_qty = produced_products.get(produce_product.product_id.id, 0)
                rest_qty = production.product_qty - produced_qty
                if rest_qty <= production_qty:
                   production_qty = rest_qty
                if rest_qty > 0 :
                    stock_mov_obj.action_consume(cr, uid, [produce_product.id], production_qty, context=context)

        for raw_product in production.move_lines2:
            new_parent_ids = []
            parent_move_ids = [x.id for x in raw_product.move_history_ids]
            for final_product in production.move_created_ids2:
                if final_product.id not in parent_move_ids:
                    new_parent_ids.append(final_product.id)
            for new_parent_id in new_parent_ids:
                stock_mov_obj.write(cr, uid, [raw_product.id], {'move_history_ids': [(4,new_parent_id)]})

        wf_service = netsvc.LocalService("workflow")
        wf_service.trg_validate(uid, 'mrp.production', production_id, 'button_produce_done', cr)
        return True

    def _costs_generate(self, cr, uid, production):
        """ Calculates total costs at the end of the production.
        @param production: Id of production order.
        @return: Calculated amount.
        """
        amount = 0.0
        analytic_line_obj = self.pool.get('account.analytic.line')
        for wc_line in production.workcenter_lines:
            wc = wc_line.workcenter_id
            if wc.costs_journal_id and wc.costs_general_account_id:
                value = wc_line.hour * wc.costs_hour
                account = wc.costs_hour_account_id.id
                if value and account:
                    amount += value
                    analytic_line_obj.create(cr, uid, {
                        'name': wc_line.name + ' (H)',
                        'amount': value,
                        'account_id': account,
                        'general_account_id': wc.costs_general_account_id.id,
                        'journal_id': wc.costs_journal_id.id,
                        'code': wc.code
                    } )
            if wc.costs_journal_id and wc.costs_general_account_id:
                value = wc_line.cycle * wc.costs_cycle
                account = wc.costs_cycle_account_id.id
                if value and account:
                    amount += value
                    analytic_line_obj.create(cr, uid, {
                        'name': wc_line.name+' (C)',
                        'amount': value,
                        'account_id': account,
                        'general_account_id': wc.costs_general_account_id.id,
                        'journal_id': wc.costs_journal_id.id,
                        'code': wc.code,
                    } )
        return amount

    def action_in_production(self, cr, uid, ids):
        """ Changes state to In Production and writes starting date.
        @return: True
        """
        self.write(cr, uid, ids, {'state': 'in_production', 'date_start': time.strftime('%Y-%m-%d %H:%M:%S')})
        return True

    def test_if_product(self, cr, uid, ids):
        """
        @return: True or False
        """
        res = True
        for production in self.browse(cr, uid, ids):
            if not production.product_lines:
                if not self.action_compute(cr, uid, [production.id]):
                    res = False
        return res

    def _get_auto_picking(self, cr, uid, production):
        return True

    def action_confirm(self, cr, uid, ids):
        """ Confirms production order.
        @return: Newly generated picking Id.
        """
        picking_id = False
        proc_ids = []
        seq_obj = self.pool.get('ir.sequence')
        pick_obj = self.pool.get('stock.picking')
        move_obj = self.pool.get('stock.move')
        proc_obj = self.pool.get('procurement.order')
        wf_service = netsvc.LocalService("workflow")
        for production in self.browse(cr, uid, ids):
            if not production.product_lines:
                self.action_compute(cr, uid, [production.id])
                production = self.browse(cr, uid, [production.id])[0]
            routing_loc = None
            pick_type = 'internal'
            address_id = False
            if production.bom_id.routing_id and production.bom_id.routing_id.location_id:
                routing_loc = production.bom_id.routing_id.location_id
                if routing_loc.usage <> 'internal':
                    pick_type = 'out'
                address_id = routing_loc.address_id and routing_loc.address_id.id or False
                routing_loc = routing_loc.id
            pick_name = seq_obj.get(cr, uid, 'stock.picking.' + pick_type)
            picking_id = pick_obj.create(cr, uid, {
                'name': pick_name,
                'origin': (production.origin or '').split(':')[0] + ':' + production.name,
                'type': pick_type,
                'move_type': 'one',
                'state': 'auto',
                'address_id': address_id,
                'auto_picking': self._get_auto_picking(cr, uid, production),
                'company_id': production.company_id.id,
            })

            source = production.product_id.product_tmpl_id.property_stock_production.id
            data = {
                'name':'PROD:' + production.name,
                'date': production.date_planned,
                'product_id': production.product_id.id,
                'product_qty': production.product_qty,
                'product_uom': production.product_uom.id,
                'product_uos_qty': production.product_uos and production.product_uos_qty or False,
                'product_uos': production.product_uos and production.product_uos.id or False,
                'location_id': source,
                'location_dest_id': production.location_dest_id.id,
                'move_dest_id': production.move_prod_id.id,
                'state': 'waiting',
                'company_id': production.company_id.id,
            }
            res_final_id = move_obj.create(cr, uid, data)

            self.write(cr, uid, [production.id], {'move_created_ids': [(6, 0, [res_final_id])]})
            moves = []
            for line in production.product_lines:
                move_id = False
                newdate = production.date_planned
                if line.product_id.type in ('product', 'consu'):
                    res_dest_id = move_obj.create(cr, uid, {
                        'name':'PROD:' + production.name,
                        'date': production.date_planned,
                        'product_id': line.product_id.id,
                        'product_qty': line.product_qty,
                        'product_uom': line.product_uom.id,
                        'product_uos_qty': line.product_uos and line.product_uos_qty or False,
                        'product_uos': line.product_uos and line.product_uos.id or False,
                        'location_id': routing_loc or production.location_src_id.id,
                        'location_dest_id': source,
                        'move_dest_id': res_final_id,
                        'state': 'waiting',
                        'company_id': production.company_id.id,
                    })
                    moves.append(res_dest_id)
                    move_id = move_obj.create(cr, uid, {
                        'name':'PROD:' + production.name,
                        'picking_id':picking_id,
                        'product_id': line.product_id.id,
                        'product_qty': line.product_qty,
                        'product_uom': line.product_uom.id,
                        'product_uos_qty': line.product_uos and line.product_uos_qty or False,
                        'product_uos': line.product_uos and line.product_uos.id or False,
                        'date': newdate,
                        'move_dest_id': res_dest_id,
                        'location_id': production.location_src_id.id,
                        'location_dest_id': routing_loc or production.location_src_id.id,
                        'state': 'waiting',
                        'company_id': production.company_id.id,
                    })
                proc_id = proc_obj.create(cr, uid, {
                    'name': (production.origin or '').split(':')[0] + ':' + production.name,
                    'origin': (production.origin or '').split(':')[0] + ':' + production.name,
                    'date_planned': newdate,
                    'product_id': line.product_id.id,
                    'product_qty': line.product_qty,
                    'product_uom': line.product_uom.id,
                    'product_uos_qty': line.product_uos and line.product_qty or False,
                    'product_uos': line.product_uos and line.product_uos.id or False,
                    'location_id': production.location_src_id.id,
                    'procure_method': line.product_id.procure_method,
                    'move_id': move_id,
                    'company_id': production.company_id.id,
                })
                wf_service.trg_validate(uid, 'procurement.order', proc_id, 'button_confirm', cr)
                proc_ids.append(proc_id)
            wf_service.trg_validate(uid, 'stock.picking', picking_id, 'button_confirm', cr)
            self.write(cr, uid, [production.id], {'picking_id': picking_id, 'move_lines': [(6,0,moves)], 'state':'confirmed'})
            message = _("Manufacturing order '%s' is scheduled for the %s.") % (
                production.name,
                datetime.strptime(production.date_planned,'%Y-%m-%d %H:%M:%S').strftime('%m/%d/%Y'),
            )
            self.log(cr, uid, production.id, message)
        return picking_id

    def force_production(self, cr, uid, ids, *args):
        """ Assigns products.
        @param *args: Arguments
        @return: True
        """
        pick_obj = self.pool.get('stock.picking')
        pick_obj.force_assign(cr, uid, [prod.picking_id.id for prod in self.browse(cr, uid, ids)])
        return True

mrp_production()

class mrp_production_workcenter_line(osv.osv):
    _name = 'mrp.production.workcenter.line'
    _description = 'Work Order'
    _order = 'sequence'

    _columns = {
        'name': fields.char('Work Order', size=64, required=True),
        'workcenter_id': fields.many2one('mrp.workcenter', 'Work Center', required=True),
        'cycle': fields.float('Nbr of cycles', digits=(16,2)),
        'hour': fields.float('Nbr of hours', digits=(16,2)),
        'sequence': fields.integer('Sequence', required=True, help="Gives the sequence order when displaying a list of work orders."),
        'production_id': fields.many2one('mrp.production', 'Production Order', select=True, ondelete='cascade', required=True),
    }
    _defaults = {
        'sequence': lambda *a: 1,
        'hour': lambda *a: 0,
        'cycle': lambda *a: 0,
    }
mrp_production_workcenter_line()

class mrp_production_product_line(osv.osv):
    _name = 'mrp.production.product.line'
    _description = 'Production Scheduled Product'
    _columns = {
        'name': fields.char('Name', size=64, required=True),
        'product_id': fields.many2one('product.product', 'Product', required=True),
        'product_qty': fields.float('Product Qty', required=True),
        'product_uom': fields.many2one('product.uom', 'Product UOM', required=True),
        'product_uos_qty': fields.float('Product UOS Qty'),
        'product_uos': fields.many2one('product.uom', 'Product UOS'),
        'production_id': fields.many2one('mrp.production', 'Production Order', select=True),
    }
mrp_production_product_line()

# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: