eiru_purchases/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
from StringIO import StringIO as IO
import simplejson as json
import gzip
import logging

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

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

    '''
        Get server date to send
    '''
    def get_server_date(self):
        return datetime.now(self.get_timezone()).strftime(DATE_FORMAT)

    '''
        Get current user information
    '''
    def get_user(self):
        user = request.env.user

        return {
            'id': user.id,
            'name': user.name,
            'displayName': user.display_name,
            'currency': {
                'id': user.company_id.currency_id.id,
                'name': user.company_id.currency_id.name,
                'displayName': user.company_id.currency_id.display_name,
                'symbol': user.company_id.currency_id.symbol
            },
            'company': {
                'id': user.company_id.id,
                'name': user.company_id.name,
                'displayName': user.company_id.display_name
            }
        }

    '''
        Get currencies
    '''
    def get_currencies(self):
        return [{
            'id': currency.id,
            'name': currency.name,
            'displayName': currency.display_name,
            'base': currency.base,
            'accuracy': currency.accuracy,
            'rateSilent': currency.rate_silent,
            'rounding': currency.rounding,
            'symbol': currency.symbol,
            'position': currency.position,
            'decimalSeparator': currency.decimal_separator,
            'decimalPlaces': currency.decimal_places,
            'thousandsSeparator': currency.thousands_separator
        } for currency in request.env['res.currency'].search([('active', '=', True)])]

    '''
        Get all active journals
    '''
    def get_journals(self):
        return [{
            'id': journal.id,
            'name': journal.name,
            'displayName': journal.display_name,
            'code': journal.code,
            'cashControl': journal.cash_control,
            'type': journal.type,
            'currency': {
                'id': journal.currency.id,
                'name': journal.currency.name,
                'displayName': journal.currency.display_name
            },
            'defaultDebitAccount': {
                'id': journal.default_debit_account_id.id,
                'name': journal.default_debit_account_id.name,
                'displayName': journal.default_debit_account_id.display_name,
                'code': journal.default_debit_account_id.code,
                'exchange_rate': journal.default_credit_account_id.exchange_rate,
                'foreignBalance': journal.default_credit_account_id.foreign_balance,
                'reconcile': journal.default_credit_account_id.reconcile,
                'debit': journal.default_credit_account_id.debit,
                'credit': journal.default_credit_account_id.credit,
                'currencyMode': journal.default_credit_account_id.currency_mode,
                'companyCurrency': {
                    'id': journal.default_credit_account_id.company_currency_id.id,
                    'name': journal.default_credit_account_id.company_currency_id.name,
                    'displayName': journal.default_credit_account_id.company_currency_id.display_name,
                },
                'currency': {
                    'id': journal.default_credit_account_id.currency_id.id,
                    'name': journal.default_credit_account_id.currency_id.name,
                    'displayName': journal.default_credit_account_id.currency_id.display_name
                }

            }
        } for journal in request.env['account.journal'].search([('type', 'in', ['bank', 'cash']), ('default_debit_account_id.currency_id', '=', False), ('active', '=', True)], order='id')]

    '''
        Get all active suppliers
    '''
    def get_suppliers(self):
        return [{
            'id': supplier.id,
            'name': supplier.name,
            'displayName': supplier.display_name,
            'imageMedium': supplier.image_medium,
            'ruc': supplier.ruc,
            'phone': supplier.phone,
            'mobile': supplier.mobile,
            'email': supplier.email
        } for supplier in request.env['res.partner'].search([('supplier', '=', True), ('active', '=', True)])]

    '''
        Get all purchasable and active products
    '''
    def get_products(self, type=None):
        product_obj = request.env['product.template']
        domain = [('standard_price', '>=', 0), ('active', '=', True)]

        if type == 'purchase':
            domain.append(('purchase_ok', '=', True))
        else:
            if product_obj.fields_get('hr_expense_ok'):
                domain.append(('hr_expense_ok', '=', True))
            else:
                return []

        return [{
            'id': product.id,
            'name': product.name,
            'displayName': product.display_name,
            'ean13': product.ean13,
            'imageMedium': product.image_medium,
            'standardPrice': product.standard_price,
            'variantCount': product.product_variant_count,
            'quantity': 1,
            'price': product.standard_price,
            'minimumPrice': product.minimum_price,
            'maximumPrice': product.maximum_price,
            'variants': [{
                'id': variant.id,
                'name': variant.name,
                'displayName': variant.display_name,
                'ean13': variant.ean13,
                'imageMedium': variant.image_medium,
                'standardPrice': variant.standard_price,
                'quantity': 1,
                'price': variant.standard_price,
                'minimumPrice': product.minimum_price,
                'maximumPrice': product.maximum_price
            } for variant in product.product_variant_ids if variant.active]
        } for product in product_obj.search(domain)]
        
    '''
        Get all incoming and active picking types
    '''
    def get_picking_types(self):
        return [{
            'id': picking_type.id,
            'name': picking_type.name,
            'displayName': picking_type.display_name
        } for picking_type in request.env['stock.picking.type'].search([('code', '=', 'incoming'), ('active', '=', True)])]
    
    '''
        Get all active payment terms
    '''
    def get_payment_terms(self):
        return [{
            'id': payment_term.id,
            'name': payment_term.name,
            'displayName': 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([('active', '=', True)])]

    '''
        Make JSON response to send
    '''
    def make_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('\033[1;34m[INFO] --> \033[m{}'.format(log))

    '''
        New purchase resource route
    '''
    @http.route('/eiru_purchases/init', auth='user', methods=['GET'], cors='*')
    def init_purchase(self, **kw):
        self.make_info_log('Preparing data to {}'.format(kw.get('mode')))

        return self.make_gzip_response({
            'date': self.get_server_date(),
            'user': self.get_user(),
            'currencies': self.get_currencies(),
            'journals': self.get_journals(),
            'suppliers': self.get_suppliers(),
            'products': self.get_products(kw.get('mode')),
            'pickingTypes': self.get_picking_types(),
            'paymentTerms': self.get_payment_terms()
        })

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

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

        return {
            'id': supplier.id,
            'name': supplier.name,
            'displayName': supplier.display_name,
            'imageMedium': supplier.image_medium,
            'phone': supplier.phone,
            'mobile': supplier.mobile,
            'email': supplier.email
        }

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

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

        return {
            'id': product.id,
            'name': product.name,
            'displayName': product.display_name,
            'ean13': product.ean13,
            'imageMedium': product.image_medium,
            'standardPrice': product.standard_price,
            'variantCount': product.product_variant_count,
            'price': product.list_price,
            'minimumPrice': product.minimum_price,
            'maximumPrice': product.maximum_price,
            'variants': [{
                'id': variant.id,
                'name': variant.name,
                'displayName': variant.display_name,
                'ean13': variant.ean13,
                'imageMedium': variant.image_medium,
                'standardPrice': product.standard_price,
                'price': variant.standard_price,
                'minimumPrice': product.minimum_price,
                'maximumPrice': product.maximum_price
            } for variant in product.product_variant_ids if variant.active]
        }

    '''
        Get currency id based on journal
    '''
    def get_currency_id(self, journal_id):
        journal = request.env['account.journal'].browse(journal_id)
        return journal.default_debit_account_id.currency_id.id or journal.default_debit_account_id.company_currency_id.id


    '''
        Check currency in pricelist and return it
    '''
    def get_pricelist_id(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.id

    '''
        Get default location
    '''
    def get_stock_location_id(self):
        stock_location = request.env['stock.location'].search([('usage', '=', 'internal')])

        return stock_location.id

    '''
        Create purchase order from cart and return id
    '''
    def create_purchase_order(self, supplier_id, cart_items, date_order, currency_id, pricelist_id, payment_term_id=None):
        return request.env['purchase.order'].create({
            'name': '/',
            'partner_id': supplier_id,
            'order_line': [[0, False, {
                'name': line.get('name'),
                'date_planned': date_order,
                'product_id': int(line.get('id')),
                'product_qty': float(line.get('quantity')),
                'price_unit': float(line.get('price'))
            }] for line in cart_items],
            'date_order': datetime.utcnow().strftime(DATETIME_FORMAT),
            'currency_id': currency_id,
            'pricelist_id': pricelist_id,
            'payment_term_id': payment_term_id,
            'location_id': self.get_stock_location_id(),
            'invoice_method': 'order'
        })

    '''
        Confirm purchase order
    '''
    def confirm_purchase_order(self, purchase_order_id):
        purchase_order = request.env['purchase.order'].browse(purchase_order_id)
        purchase_order.action_purchase_confirm()

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

        purchase_order.write({
            'state': 'done'
        })

    '''
        Create invoice
    '''
    def create_invoice(self, supplier_id, cart_items, currency_id, payment_term_id=None):
        partner = request.env['res.partner'].browse(supplier_id)
        journal = request.env['account.journal'].search([('type', 'in', ['purchase']), ('company_id', '=', partner.company_id.id)])

        return request.env['account.invoice'].create({
            'name': '/',
            'partner_id': partner.id,
            'invoice_line': [[0, False, {
                'name': line.get('name'),
                'product_id': int(line.get('id')),
                'quantity': float(line.get('quantity')),
                'price_unit': float(line.get('price'))
            }] for line in cart_items],
            'account_id': partner.property_account_payable.id,
            'journal_id': journal.id,
            'currency_id': currency_id,
            'payment_term': payment_term_id,
            'type': 'in_invoice'
        })

    '''
        Validate invoice
    '''
    def prepare_invoice(self, invoice_ids, currency_id, date_today):
        assert len(invoice_ids) == 1

        invoice = request.env['account.invoice'].browse(invoice_ids)
        
        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'
        })

    '''
        Create move lines
    '''
    def create_invoice_move_lines(self, invoice_ids, paid_amount, date_today):
        assert len(invoice_ids) == 1
        invoice = request.env['account.invoice'].browse(invoice_ids)
        is_purchase = False

        scoped_context = dict(request.context, lang=invoice.partner_id.lang)

        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.with_context(lang=invoice.partner_id.lang))
        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.with_context(scoped_context).compute_invoice_totals(invoice.company_id.currency_id, invoice.reference, invoice_move_lines)

        if total < 0:
            total = total * -1
            is_purchase = True

        paid_percentage = abs(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 = paid_amount + current_price
                price = current_price if payment_line[1] else round(total - paid_amount, decimal_precision) or total

                if is_purchase:
                    price = price * -1

                invoice_move_lines.append({
                    'type': 'dest',
                    'name': '/',
                    'price': price,
                    '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.type in ('in_invoice', 'in_refund') and invoice.reference or invoice.number 
                })
                
            payment_lines = []

        return invoice_move_lines

    '''
        Create account move
    '''
    def create_account_move(self, invoice_ids, invoice_move_lines):
        assert len(invoice_ids) == 1

        invoice = request.env['account.invoice'].browse(invoice_ids)
        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.with_context(request.context, lang=invoice.partner_id.lang).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 validate_invoice(self, invoice_ids, type=None):
        assert len(invoice_ids) == 1

        invoice = request.env['account.invoice'].browse(invoice_ids)

        invoice.action_number()
        invoice.invoice_validate()

        if type != 'purchase':
            name = 'GASTO' + invoice.name[invoice.name.index('/'):]
            invoice.write({
                'number': name,
                'internal_number': name
            })

    '''
        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': 'payment',
            '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_debit_account_id.id,
            'currency_id': currency_id,
            'line_dr_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.credit) 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_ids):
        assert len(invoice_ids) == 1

        invoice = request.env['account.invoice'].browse(invoice_ids)

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

    '''
        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


    '''
        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)

        amount = account_voucher.amount
        
        if account_voucher.type == 'payment':
            amount = amount * -1

        return [[0, False, {
            'name': account_voucher.reference,
            'amount': 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 '')
        }]]

    '''
        Purchase processing resource route
    ''' 
    @http.route('/eiru_purchases/process', type='json', auth='user', methods=['POST'], cors='*')
    def process_purchase(self, **kw):
        mode = kw.get('mode')
        self.make_info_log('Processing {}'.format(mode))

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

        # Get currency
        currency_id = self.get_currency_id(kw.get('journalId'))
        self.make_info_log('Getting currency')

        # Get pricelist
        pricelist_id = self.get_pricelist_id(currency_id)
        self.make_info_log('Product pricelist checked')

        invoice = None

        if mode == 'purchase':
            # Create purchase order 
            purchase_order = self.create_purchase_order(kw.get('supplierId'), kw.get('items'), date_now, currency_id, pricelist_id, kw.get('paymentTermId'))
            self.make_info_log('Purchase order created')

            # Confirm purchase 
            self.confirm_purchase_order(purchase_order.id)
            self.make_info_log('Purchase order confirmed')
            
            invoice = purchase_order.invoice_ids
        else:
            invoice = self.create_invoice(kw.get('supplierId'), kw.get('items'), currency_id, kw.get('paymentTermId'))
            self.make_info_log('Invoice created')

        invoice_ids = invoice.mapped(lambda x: x.id) 
        
        # Validate invoice
        self.prepare_invoice(invoice_ids, currency_id, date_now)
        self.make_info_log('Invoice prepared')

        # Create invoice move lines
        invoice_move_lines = self.create_invoice_move_lines(invoice_ids, float(kw.get('payment')), date_now)
        self.make_info_log('Invoice move lines created')

        # Create account move
        account_move = self.create_account_move(invoice_ids, invoice_move_lines)
        self.make_info_log('Account move created')

        # Validate invoice
        self.validate_invoice(invoice_ids, mode)
        self.make_info_log('Invoice validated')

        # 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('Account voucher created')

        # Close invoice
        self.close_invoice(invoice_ids)
        self.make_info_log('Attempt close invoice')

        # Create account bank statement lines
        account_bank_statement_lines = self.create_bank_statement_lines(account_voucher.id)
        self.make_info_log('Bank statement lines created')

        # Create account bank statement
        self.create_bank_statement(account_voucher.id, account_bank_statement_lines, date_now)
        self.make_info_log('Bank statement created')

        return {
            'status': 'ok'
        }