eiru_pos/controllers/main.py

# -*- coding: utf-8 -*-

from openerp import http
from openerp.http import request
from werkzeug.wrappers import Response
from werkzeug.datastructures import Headers
from datetime import datetime
from dateutil.relativedelta import relativedelta as rd
from dateutil.parser import parse
from pytz import timezone
from gzip import GzipFile
import simplejson as json
import gzip
import logging

try:
    from cStringIO import StringIO as IO
except ImportError:
    from StringIO import StringIO as IO

LOGGER = logging.getLogger(__name__)
DATE_FORMAT = '%Y-%m-%d'
DATETIME_FORMAT = '%Y-%m-%d %H:%M:%S'
GZIP_COMPRESSION_LEVEL = 9

'''
         ___ ___  __      __   __       ___  __   __             ___  __      ___  __   __      __   __   __  
    |__|  |   |  |__)    /  ` /  \ |\ |  |  |__) /  \ |    |    |__  |__)    |__  /  \ |__)    |__) /  \ /__` 
    |  |  |   |  |       \__, \__/ | \|  |  |  \ \__/ |___ |___ |___ |  \    |    \__/ |  \    |    \__/ .__/

    # Resource paths
        - /init:            return json response gzip compressed contains values for sale operation 
        - /create_product:  create product on the fly POS and return it
        - /create_customer: create customer on the fly and return it
        - /process_sale:    processing sale and return true if completed
                                                                                                              
'''
class PosSales(http.Controller):

    '''
        Get timezone
    '''
    def get_timezone(self):
        return timezone(request.context['tz'])

    '''
        Get server date
    '''
    def get_server_datetime(self):
        return datetime.now(self.get_timezone()).strftime(DATETIME_FORMAT)

    '''
        Check if module is installed
    '''
    def is_module_installed(self, module_name):
        domain = [('name', '=', module_name), ('state', '=', 'installed')]
        module = request.env['ir.module.module'].search(domain)

        return len(module) != 0
    
    '''
        Get current user information
    '''
    def get_user(self):
        user = request.env.user

        return {
            'id': user.id,
            'name': user.display_name,
            'company': {
                'id': user.company_id.id,
                'name': user.company_id.display_name,
                'phone': user.company_id.phone or None,
                'city': user.company_id.city or None
            }
        }

    '''
        Get currencies from configured journals
    '''
    def get_currencies_from_journals(self):
        domain = [('type', 'in', ['bank', 'cash']), ('active', '=', True)]
        currencies = []

        for journal in request.env['account.journal'].search(domain):
            currency = journal.currency or journal.company_id.currency_id

            currencies.append({
                'id': currency.id,
                'name': currency.display_name,
                'base': currency.base,
                'symbol': currency.symbol,
                'position': currency.position,
                'decimalSeparator': currency.decimal_separator,
                'decimalPlaces': currency.decimal_places,
                'thousandsSeparator': currency.thousands_separator
            })
            
        return {c['id']:c for c in currencies}.values()

    '''
        Get all active journals
    '''
    def get_journals(self):
        domain = [('type', 'in', ['bank', 'cash']), ('active', '=', True)]

        return [{
            'id': journal.id,
            'name': journal.display_name,
            'code': journal.code,
            'type': journal.type,
            'currencyId': journal.currency.id or journal.company_id.currency_id.id
        } for journal in request.env['account.journal'].search(domain, order='id')]
    
    '''
        Get banks
    '''
    def get_banks(self):
        banks = []

        if self.is_module_installed('eiru_bank_payments_references'):
            banks = [
                {
                    'id': bank.id,
                    'name': bank.display_name
                } for bank in request.env['res.bank'].search([('active', '=', True)])
            ]

        return banks

    '''
        Get bank payment types
    '''
    def get_bank_payment_types(self):
        bank_types = []

        if self.is_module_installed('eiru_bank_payments_references'):
            bank_types = [
                {
                    'id': type.id,
                    'name': type.display_name,
                    'code': type.code,
                    'defaultState': type.default_state
                } for type in request.env['res.bank.payments.type'].search([('is_receipt', '=', True)])
            ]

        return bank_types

    '''
        Get all active customers
    '''
    def get_customers(self):
        domain = [('customer', '=', True), ('active', '=', True)]

        return [
            {
                'id': customer.id,
                'name': customer.display_name,
                'image': customer.image_small,
                'ruc': customer.ruc or None,
                'phone': customer.phone or None,
                'mobile': customer.mobile or None,
                'email': customer.email or None
            } for customer in request.env['res.partner'].search(domain)
        ]

    '''
        Get all saleable and active products
    '''
    def get_products(self):
        domain = [('sale_ok', '=', True), ('list_price', '>', 0), ('active', '=', True)]

        return [
            {
                'id': product.id,
                'name': product.display_name,
                'ean13': product.ean13,
                'defaultCode': product.default_code,
                'image': product.image_small,
                'listPrice': product.list_price,
                'variantCount': product.product_variant_count,
                'quantity': 1,
                'price': product.list_price,
                'minimumPrice': product.minimum_price,
                'maximumPrice': product.maximum_price,
                'discount': 0,
                'variants': [{
                    'id': variant.id,
                    'name': variant.display_name,
                    'ean13': variant.ean13,
                    'defaultCode': product.default_code,
                    'image': variant.image_medium,
                    'listPrice': variant.list_price,
                    'quantity': 1,
                    'price': variant.list_price,
                    'minimumPrice': product.minimum_price,
                    'maximumPrice': product.maximum_price,
                    'discount': 0,
                } for variant in product.product_variant_ids if variant.active]
            } for product in request.env['product.template'].search(domain)
        ]

    '''
        Get all active payment terms
    '''
    def get_payment_terms(self):
        domain = [('active', '=', True)]

        return [
            {
                'id': payment_term.id,
                'name': payment_term.display_name,
                'lines': [{
                    'id': line.id,
                    'days': line.days,
                    'days2': line.days2,
                    'value': line.value,
                    'valueAmount': line.value_amount
                } for line in payment_term.line_ids]
            } for payment_term in request.env['account.payment.term'].search(domain)
        ]

    '''
        Make JSON response
    '''
    def make_json_response(self, data=None, status=200):
        return Response(json.dumps(data), status=status, content_type='application/json')

    '''
        Make GZIP to JSON response
    '''
    def make_gzip_response(self, data=None, status=200):
        gzip_buffer = IO()

        with GzipFile(mode='wb', compresslevel=GZIP_COMPRESSION_LEVEL, fileobj=gzip_buffer) as gzip_file:
            gzip_file.write(json.dumps(data))
        
        contents = gzip_buffer.getvalue()
        gzip_buffer.close()

        headers = Headers()
        headers.add('Content-Encoding', 'gzip')
        headers.add('Vary', 'Accept-Encoding')
        headers.add('Content-Length', len(contents))

        return Response(contents, status=status, headers=headers, content_type='application/json')
    
    '''
    '''
    def make_info_log(self, log):
        LOGGER.info(log)

    '''
        New purchase resource route
    '''
    @http.route('/eiru_sales/init', auth='user', methods=['GET'], cors='*')
    def init_sale(self, **kw):
        self.make_info_log('Sending JSON response')
    
        return self.make_gzip_response(
            {
                'date': self.get_server_datetime(),
                'user': self.get_user(),
                'currencies': self.get_currencies_from_journals(),
                'journals': self.get_journals(),
                'customers': self.get_customers(),
                'products': self.get_products(),
                'paymentTerms': self.get_payment_terms(),
                'banks': self.get_banks(),
                'bankPaymentTypes': self.get_bank_payment_types()
            }
        )

    
    '''
        Create customer and return data
    '''
    @http.route('/eiru_sales/create_customer', type='json', auth='user', methods=['POST'], cors='*')
    def create_customer(self, **kw):
        self.make_info_log('Creating customer')

        customer = request.env['res.partner'].create({
            'name': kw.get('name'),
            'ruc': kw.get('ruc'),
            'mobile': kw.get('mobile'),
            'customer': True
        })

        return {
            'id': customer.id,
            'name': customer.display_name,
            'image': customer.image_small,
            'ruc': customer.ruc or None,
            'phone': customer.phone or None,
            'mobile': customer.mobile or None,
            'email': customer.email or None
        }
    
    '''
        Create product and return data
    '''
    @http.route('/eiru_sales/create_product', type='json', auth='user', methods=['POST'], cors='*')
    def create_product(self, **kw):
        self.make_info_log('Creating customer')

        product = request.env['product.template'].create({
            'name': kw.get('name'),
            'list_price': float(kw.get('price')),
            'ean13': kw.get('ean13')
        })

        return {
            'id': product.id,
            'name': product.display_name,
            'ean13': product.ean13,
            'image': product.image_small,
            'listPrice': product.list_price,
            'variantCount': product.product_variant_count,
            'quantity': 1,
            'price': product.list_price,
            'discount': 0,
            'variants': [{
                'id': variant.id,
                'name': variant.display_name,
                'ean13': variant.ean13,
                'image': variant.image_small,
                'listPrice': variant.list_price,
                'quantity': 1,
                'price': variant.list_price,
                'discount': 0,
            } for variant in product.product_variant_ids if variant.active]
        }

    '''
        Get currency from journal
    '''
    def get_currency(self, journal_id):
        journal = request.env['account.journal'].browse(journal_id)
        return journal.default_credit_account_id.currency_id.id or journal.default_credit_account_id.company_currency_id.id

    '''
        Check currency in pricelist and get it
    '''
    def get_pricelist(self, currency_id):
        pricelist = request.env['product.pricelist'].search([('active', '=', True), ('type', '=', 'sale')])

        if not True in pricelist.mapped(lambda p: p.currency_id.id == currency_id):
            pricelist = pricelist[0].copy()
            pricelist.write({
                'currency_id': currency_id
            })
        else:
            pricelist = pricelist.filtered(lambda p: p.currency_id.id == currency_id)
        
        return pricelist

    '''
        Create sale order from cart items values
    '''
    def create_sale_from_cart(self, partner_id, cart_items, date_confirm, currency_id, pricelist_id, payment_term_id=None):
        return request.env['sale.order'].create({
            'partner_id': partner_id,
            'order_line': [[0, False, {
                'product_id': int(line.get('id')),
                'product_uom_qty': float(line.get('quantity')),
                'price_unit': float(line.get('price'))
            }] for line in cart_items],
            'picking_policy': 'direct',
            'date_confirm': date_confirm,
            'currency_id': currency_id,
            'pricelist_id': pricelist_id,
            'payment_term': payment_term_id,
            'state': 'draft',
        })

    '''
        Confirm sale order
    '''
    def confirm_sale_order(self, sale_order_id):
        sale_order = request.env['sale.order'].browse(sale_order_id)
        sale_order.write({
            'state': 'manual'
        })

        return sale_order.action_button_confirm()

    '''
        Create invoice from sale order
    '''
    def create_invoice(self, sale_order_id, currency_id, date_today):
        sale_order = request.env['sale.order'].browse(sale_order_id)
        invoice_id = sale_order.action_invoice_create()
        invoice = request.env['account.invoice'].browse(invoice_id)

        for picking in sale_order.picking_ids:
            picking.force_assign()
            picking.action_done()

        date_due = parse(date_today) + rd(days=max(invoice.payment_term.line_ids.mapped(lambda x: x.days + x.days2)))

        invoice.write({
            'currency_id': currency_id,
            'date_invoice': date_today,
            'date_due': date_due.strftime(DATE_FORMAT),
            'state': 'open'
        })

        return invoice

    '''
        Create move lines
    '''
    def create_invoice_move_lines(self, invoice_id, paid_amount, date_today):
        invoice = request.env['account.invoice'].browse(invoice_id)
        invoice_move_lines = invoice._get_analytic_lines()
        decimal_precision = request.env['decimal.precision'].precision_get('Account')

        compute_taxes = request.env['account.invoice.tax'].compute(invoice)
        invoice.check_tax_lines(compute_taxes)
        invoice._recompute_tax_amount()

        invoice_move_lines += request.env['account.invoice.tax'].move_line_get(invoice.id)

        total, total_currency, invoice_move_lines = invoice.compute_invoice_totals(invoice.company_id.currency_id, invoice.reference, invoice_move_lines)

        paid_percentage = paid_amount / round(total, decimal_precision)
        distributed_percentage = -(paid_percentage / len(invoice.payment_term.line_ids))

        payment_lines = []

        for line in invoice.payment_term.line_ids:
            date_due = (parse(date_today) + rd(days=line.days + line.days2)).strftime(DATE_FORMAT)

            if paid_percentage and paid_percentage < 1.0:
                payment_lines.append([date_today, paid_percentage])
                paid_percentage = paid_amount = 0

                if date_due == date_today and line.value_amount:
                    distributed_percentage = -((payment_lines[0][1] - line.value_amount)  / (len(invoice.payment_term.line_ids) - 1))
                    continue
            
            if line.value != 'balance':
                payment_lines.append([date_due, line.value_amount + distributed_percentage])
                continue

            payment_lines.append([date_due, line.value_amount])

            for payment_line in payment_lines:
                current_price = round(total * payment_line[1], decimal_precision)

                if current_price < 0.0:
                    continue

                paid_amount += current_price

                invoice_move_lines.append({
                    'type': 'dest',
                    'name': '/',
                    'price': current_price if payment_line[1] else round(total - paid_amount, decimal_precision) or total,
                    'account_id': invoice.account_id.id,
                    'date_maturity': payment_line[0],
                    'amount_currency': invoice.company_id.currency_id.compute(payment_line[1], invoice.currency_id) if invoice.currency_id != invoice.company_id.currency_id else False,
                    'currency_id': invoice.currency_id != invoice.company_id.currency_id and invoice.currency_id.id,
                    'ref': invoice.reference
                })
                
            payment_lines = []

        return invoice_move_lines

    '''
        Create account move
    '''
    def create_account_move(self, invoice_id, invoice_move_lines):
        invoice = request.env['account.invoice'].browse(invoice_id)
        accounting_partner = request.env['res.partner']._find_accounting_partner(invoice.partner_id)

        move_line_values = [(0, 0, invoice.line_get_convert(line, accounting_partner.id, invoice.date_invoice)) for line in invoice_move_lines]
        move_line_values = invoice.group_lines(invoice_move_lines, move_line_values)
        move_line_values = invoice.finalize_invoice_move_lines(move_line_values)

        ctx = dict(request.context, lang=invoice.partner_id.lang, company_id=invoice.company_id.id)
        period = invoice.period_id

        if not period:
            period = period.with_context(ctx).find(invoice.date_invoice)[:1]

        if period:
            for line in move_line_values:
                line[2]['period_id'] = period.id

        ctx['invoice'] = invoice
        ctx_nolang = ctx.copy()
        ctx_nolang.pop('lang', None)
 
        account_move = request.env['account.move'].with_context(ctx_nolang).create({
            'ref': invoice.reference or invoice.name,
            'line_id': move_line_values,
            'journal_id': invoice.journal_id.id,
            'date': invoice.date_invoice,
            'narration': invoice.comment,
            'company_id': invoice.company_id.id,
            'period_id': period.id
        })

        invoice.with_context(ctx).write({
            'move_id': account_move.id,
            'period_id': account_move.period_id.id,
            'move_name': account_move.name,
        })

        account_move.post()

        return account_move

    '''
        Number to invoice
    '''
    def number_invoice(self, invoice_id):
        request.env['account.invoice'].browse(invoice_id).action_number()

    '''
        Create voucher
    '''
    def create_account_voucher(self, account_move_id, journal_id, currency_id, paid_amount):
        account_move = request.env['account.move'].browse(account_move_id)
        account_journal = request.env['account.journal'].browse(journal_id)

        account_voucher = request.env['account.voucher'].create({
            'reference': account_move.name,
            'type': 'receipt',
            'journal_id': account_journal.id,
            'company_id': account_move.company_id.id,
            'pre_line': True,
            'amount': paid_amount,
            'period_id': account_move.period_id.id,
            'date': account_move.date,
            'partner_id': account_move.partner_id.id,
            'account_id': account_journal.default_credit_account_id.id,
            'currency_id': currency_id,
            'line_cr_ids': [[0, False, {
                'date_due': l.date_maturity,
                'account_id': l.account_id.id,
                'date_original': l.invoice.date_invoice,
                'move_line_id': l.id,
                'amount_original': abs(l.credit or l.debit or 0.0),
                'amount_unreconciled': abs(l.amount_residual),
                'amount': abs(l.debit) if account_move.date == l.date_maturity else 0.0,
                'reconcile': account_move.date == l.date_maturity,
                'currency_id': currency_id
            }] for l in account_move.line_id]
        })

        account_voucher.action_move_line_create()

        return account_voucher

    '''
        Close a invoice
    '''
    def close_invoice(self, invoice_id):
        invoice = request.env['account.invoice'].browse(invoice_id)

        if invoice.residual == 0:
            invoice.write({
                'state': 'paid'
            })

    '''
        Create account bank statement lines
    '''
    def create_bank_statement_lines(self, account_voucher_id, reference=None):
        account_voucher = request.env['account.voucher'].browse(account_voucher_id)

        return [[0, False, {
            'name': account_voucher.reference,
            'amount': account_voucher.amount,
            'partner_id': account_voucher.partner_id.id,
            'voucher_id': account_voucher.id,
            'journal_id': account_voucher.journal_id.id,
            'account_id': account_voucher.account_id.id,
            'journal_entry_id': account_voucher.move_id.id,
            'currency_id': account_voucher.currency_id.id,
            'ref': 'POS/' + (reference or '')
        }]]


    '''
        Create account bank statement
    '''
    def create_bank_statement(self, account_voucher_id, account_bank_statement_lines, date_today):
        account_voucher = request.env['account.voucher'].browse(account_voucher_id)
        account_bank_statement = request.env['account.bank.statement'].search([('journal_id', '=', account_voucher.journal_id.id), ('date', '=', date_today)])

        account_bank_statement_values = {
            'date': date_today,
            'user_id': request.env.user.id,
            'journal_id': account_voucher.journal_id.id,
            'period_id': account_voucher.period_id.id,
            'line_ids': account_bank_statement_lines,
            'state': 'open' if account_voucher.journal_id.type == 'cash' else 'draft'
        }

        if account_bank_statement:
            size = len(account_bank_statement)

            if size == 1:
                account_bank_statement.write(account_bank_statement_values)
            else:
                account_bank_statement[size - 1].write(account_bank_statement_values)
        else:
            account_bank_statement.create(account_bank_statement_values)

        return account_bank_statement

    '''
        Process sale
    '''
    @http.route('/eiru_sales/process_sale', type='json', auth='user', methods=['POST'], cors='*')
    def process_sale(self, **kw):
        self.make_info_log('Processing sale...')

        # Get date
        date_now = datetime.now(self.get_timezone()).strftime(DATE_FORMAT)
        self.make_info_log('[OK] Getting date')

        # Get currency
        currency_id = self.get_currency(kw.get('journalId'))
        self.make_info_log('[OK] Getting journal')

        # Get Pricelist
        pricelist = self.get_pricelist(currency_id)
        self.make_info_log('[OK] Getting product pricelist')

        # Create sale order
        sale_order = self.create_sale_from_cart(kw.get('customerId'), kw.get('items'), date_now, currency_id, pricelist.id, kw.get('paymentTermId'))
        self.make_info_log('[OK] Creating sale order')

        # Check if budget
        if kw.get('mode', 'sale') != 'sale':
            return {
                'process': True
            }

        # Confirm sale
        self.confirm_sale_order(sale_order.id)
        self.make_info_log('[OK] Confirm sale order')

        # Create invoice
        invoice = self.create_invoice(sale_order.id, currency_id, date_now)
        self.make_info_log('[OK] Creating invoice')

        # Create invoice move lines
        invoice_move_lines = self.create_invoice_move_lines(invoice.id, float(kw.get('payment')), date_now)
        self.make_info_log('[OK] Creating invoice move lines')

        # Create account move
        account_move = self.create_account_move(invoice.id, invoice_move_lines)
        self.make_info_log('[OK] Creating account move')

        # Number invoice
        self.number_invoice(invoice.id)
        self.make_info_log('[OK] Number invoice')

        # Create account voucher
        account_voucher = self.create_account_voucher(account_move.id, kw.get('journalId'), currency_id, float(kw.get('payment')))
        self.make_info_log('[OK] Creating account voucher')

        # Close invoice
        self.close_invoice(invoice.id)
        self.make_info_log('[OK] Closing invoice')

        # Create account bank statement lines
        account_bank_statement_lines = self.create_bank_statement_lines(account_voucher.id)
        self.make_info_log('[OK] Creating account bank statement lines')

        # Create bank statement
        self.create_bank_statement(account_voucher.id, account_bank_statement_lines, date_now)
        self.make_info_log('[OK] Creating account bank statement')

        return {
            'process': True,
            'name': sale_order.display_name,
            'date': self.get_server_datetime()
        }