Add invoice on account statement for reconciliation for issue589

statement.py

@@ -1,4 +1,5 @@
-#This file is part of Tryton.  The COPYRIGHT file at the top level of this repository contains the full copyright notices and license terms.
+#This file is part of Tryton.  The COPYRIGHT file at the top level of
+#this repository contains the full copyright notices and license terms.
 "Statement"
 
 from trytond.osv import fields, OSV
@@ -14,13 +15,19 @@ class Statement(OSV):
     _description = __doc__
 
     journal = fields.Many2One('account.statement.journal', 'Journal', required=True,
-            states=_STATES, on_change=['journal'], select=1)
+            states={
+                'readonly': "(state != 'draft') or (bool(lines))",
+            }, on_change=['journal'], select=1)
+    currency_digits = fields.Function('get_currency_digits', type='integer',
+            string='Currency Digits', on_change_with=['journal'])
     date = fields.Date('Date', required=True, states=_STATES, select=1)
     start_balance = fields.Numeric('Start Balance', digits=(16, 2),
             states=_STATES)
     end_balance = fields.Numeric('End Balance', digits=(16, 2), states=_STATES)
     lines = fields.One2Many('account.statement.line', 'statement',
-            'Transactions', states=_STATES)
+            'Transactions', states={
+                'readonly': "(state != 'draft') or (not bool(journal))",
+            }, on_change=['lines', 'journal'])
     state = fields.Selection([
         ('draft', 'Draft'),
         ('validated', 'Validated'),
@@ -37,9 +44,7 @@ class Statement(OSV):
         ]
         self._order[0] = ('id', 'DESC')
         self._error_messages.update({
-            'wrong_end_balance': 'Wrong End balance:\n' \
-                    ' * Expected: %s\n' \
-                    ' * Computed: %s',
+            'wrong_end_balance': 'End Balance must be %s!',
             })
 
     def default_state(self, cursor, user, context=None):
@@ -49,6 +54,16 @@ class Statement(OSV):
         date_obj = self.pool.get('ir.date')
         return date_obj.today(cursor, user, context=context)
 
+    def default_currency_digits(self, cursor, user, context=None):
+        company_obj = self.pool.get('company.company')
+        if context is None:
+            context = {}
+        if context.get('company'):
+            company = company_obj.browse(cursor, user, context['company'],
+                    context=context)
+            return company.currency.digits
+        return 2
+
     def on_change_journal(self, cursor, user, ids, value, context=None):
         res = {}
         if not value.get('journal'):
@@ -66,6 +81,21 @@ class Statement(OSV):
         res['start_balance'] = statement.end_balance
         return res
 
+    def on_change_with_currency_digits(self, cursor, user, ids, vals,
+            context=None):
+        journal_obj = self.pool.get('account.statement.journal')
+        if vals.get('journal'):
+            journal = journal_obj.browse(cursor, user, vals['journal'],
+                    context=context)
+            return journal.currency.digits
+        return 2
+
+    def get_currency_digits(self, cursor, user, ids, name, arg, context=None):
+        res = {}
+        for statement in self.browse(cursor, user, ids, context=context):
+            res[statement.id] = statement.journal.currency.digits
+        return res
+
     def get_move_lines(self, cursor, user, ids, name, args, context=None):
         '''
         Return the move lines that have been generated by the statements.
@@ -89,8 +119,61 @@ class Statement(OSV):
                 res[statement.id] += line.amount
         return res
 
+    def on_change_lines(self, cursor, user, ids, values, context=None):
+        invoice_obj = self.pool.get('account.invoice')
+        journal_obj = self.pool.get('account.statement.journal')
+        currency_obj = self.pool.get('currency.currency')
+        res = {
+            'lines': {},
+        }
+        if values.get('journal') and values.get('lines'):
+            journal = journal_obj.browse(cursor, user, values['journal'],
+                    context=context)
+            invoice_ids = set()
+            for line in values['lines']:
+                if line['invoice']:
+                    invoice_ids.add(line['invoice'])
+            invoice_id2amount_to_pay = {}
+            for invoice in invoice_obj.browse(cursor, user, invoice_ids,
+                    context=context):
+                invoice_id2amount_to_pay[invoice.id] = currency_obj.compute(
+                        cursor, user, invoice.currency, invoice.amount_to_pay,
+                        journal.currency, context=context)
+
+            for line in values['lines']:
+                if line['invoice'] and line['id']:
+                    amount_to_pay = invoice_id2amount_to_pay[line['invoice']]
+                    if abs(line['amount']) > amount_to_pay:
+                        res['lines'].setdefault('update', [])
+                        if currency_obj.is_zero(cursor, user, journal.currency,
+                                amount_to_pay):
+                            res['lines']['update'].append({
+                                'id': line['id'],
+                                'invoice': False,
+                                })
+                        else:
+                            res['lines']['update'].append({
+                                'id': line['id'],
+                                'amount': amount_to_pay,
+                                })
+                            res['lines'].setdefault('add', [])
+                            vals = line.copy()
+                            del vals['id']
+                            vals['amount'] = abs(line['amount']) - amount_to_pay
+                            if line['amount'] < 0:
+                                vals['amount'] = - vals['amount']
+                            vals['invoice'] = False
+                            res['lines']['add'].append(vals)
+                    invoice_id2amount_to_pay[line['invoice']] = \
+                            amount_to_pay - abs(line['amount'])
+        return res
+
     def set_state_validated(self, cursor, user, statement_id, context=None):
         statement_line_obj = self.pool.get('account.statement.line')
+        lang_obj = self.pool.get('ir.lang')
+
+        if context is None:
+            context = {}
 
         statement = self.browse(cursor, user, statement_id, context=context)
 
@@ -98,9 +181,18 @@ class Statement(OSV):
         for line in statement.lines:
             computed_end_balance += line.amount
         if computed_end_balance != statement.end_balance:
+            for code in [context.get('language', False) or 'en_US', 'en_US']:
+                lang_ids = lang_obj.search(cursor, user, [
+                    ('code', '=', code),
+                    ], context=context)
+                if lang_ids:
+                    break
+            lang = lang_obj.browse(cursor, user, lang_ids[0], context=context)
+
+            amount = lang_obj.currency(lang, computed_end_balance,
+                    statement.journal.currency, symbol=False, grouping=True)
             self.raise_user_error(cursor, 'wrong_end_balance',
-                    (statement.end_balance, computed_end_balance),
-                    context=context)
+                    error_args=(amount,), context=context)
         for line in statement.lines:
             statement_line_obj.create_move(cursor, user, line, context=context)
         self.write(cursor, user, statement_id, {
@@ -148,53 +240,108 @@ class Line(OSV):
     statement = fields.Many2One('account.statement', 'Statement',
             required=True, ondelete='CASCADE')
     date = fields.Date('Date', required=True)
-    amount = fields.Numeric('Amount', digits=(16,2), required=True,
-        on_change=['amount', 'party', 'account'])
+    amount = fields.Numeric('Amount', required=True,
+            digits="(16, _parent_statement.currency_digits)",
+            on_change=['amount', 'party', 'account', 'invoice',
+                '_parent_statement.journal'])
     party = fields.Many2One('party.party', 'Party',
-            on_change=['amount', 'party'])
-    account = fields.Many2One('account.account', 'Account', required=True)
+            on_change=['amount', 'party', 'invoice'])
+    account = fields.Many2One('account.account', 'Account', required=True,
+            on_change=['account', 'invoice'])
     description = fields.Char('Description')
     move = fields.Many2One('account.move', 'Account Move', readonly=True)
+    invoice = fields.Many2One('account.invoice', 'Invoice',
+            domain="[('party', '=', party), ('account', '=', account)] " \
+                    "+ (_parent_statement.state == 'draft' and " \
+                        "[('state', '=', 'open')]) or []",
+            states={
+                'readonly': "not bool(amount)",
+            })
 
     def __init__(self):
         super(Line, self).__init__()
         self._error_messages.update({
             'debit_credit_account_bank_journal': 'Please provide debit and ' \
                     'credit account on bank journal.',
+            'same_debit_credit_account': 'Credit or debit account on ' \
+                    'journal is the same than the statement line account!',
             })
 
     def on_change_party(self, cursor, user, ids, value, context=None):
-        res = {}
-        if not (value.get('party') and value.get('amount')):
-            return res
         party_obj = self.pool.get('party.party')
         account_obj = self.pool.get('account.account')
-        party = party_obj.browse(cursor, user, value['party'], context=context)
-        if value['amount'] > Decimal("0.0"):
-            account = party.account_receivable
-        else:
-            account = party.account_payable
-        res['account'] = account_obj.name_get(cursor, user, account.id,
-                context=context)[0]
+        invoice_obj = self.pool.get('account.invoice')
+        res = {}
+
+        if value.get('party'):
+            party = party_obj.browse(cursor, user, value['party'],
+                    context=context)
+            if value.get('amount'):
+                if value['amount'] > Decimal("0.0"):
+                    account = party.account_receivable
+                else:
+                    account = party.account_payable
+                res['account'] = account_obj.name_get(cursor, user, account.id,
+                        context=context)[0]
+
+        if value.get('invoice'):
+            if value.get('party'):
+                invoice = invoice_obj.browse(cursor, user, value['invoice'],
+                        context=context)
+                if invoice.party != value['party']:
+                    res['invoice'] = False
+            else:
+                res['invoice'] = False
         return res
 
     def on_change_amount(self, cursor, user, ids, value, context=None):
-        res = {}
-        if not (value.get('party') and value.get('amount')):
-            return res
         party_obj = self.pool.get('party.party')
         account_obj = self.pool.get('account.account')
-        party = party_obj.browse(cursor, user, value['party'], context=context)
-        if value.get('account') and value['account'] not in (
-            party.account_receivable.id, party.account_payable.id):
-            # The user has entered a non-default value, we keep it.
-            return res
-        if value['amount'] > Decimal("0.0"):
-            account = party.account_receivable
-        else:
-            account = party.account_payable
-        res['account'] = account_obj.name_get(cursor, user, account.id,
-                context=context)[0]
+        invoice_obj = self.pool.get('account.invoice')
+        journal_obj = self.pool.get('account.statement.journal')
+        currency_obj = self.pool.get('currency.currency')
+        res = {}
+
+        if value.get('party'):
+            party = party_obj.browse(cursor, user, value['party'], context=context)
+            if value.get('account') and value['account'] not in (
+                party.account_receivable.id, party.account_payable.id):
+                # The user has entered a non-default value, we keep it.
+                pass
+            elif value.get('amount'):
+                if value['amount'] > Decimal("0.0"):
+                    account = party.account_receivable
+                else:
+                    account = party.account_payable
+                res['account'] = account_obj.name_get(cursor, user, account.id,
+                        context=context)[0]
+        if value.get('invoice'):
+            if value.get('amount') and value.get('_parent_statement.journal'):
+                invoice = invoice_obj.browse(cursor, user, value['invoice'],
+                        context=context)
+                journal = journal_obj.browse(cursor, user,
+                        value['_parent_statement.journal'], context=context)
+                amount_to_pay = currency_obj.compute(cursor, user,
+                        invoice.currency, invoice.amount_to_pay,
+                        journal.currency, context=context)
+                if abs(value['amount']) > amount_to_pay:
+                    res['invoice'] = False
+            else:
+                res['invoice'] = False
+        return res
+
+    def on_change_account(self, cursor, user, ids, value, context=None):
+        invoice_obj = self.pool.get('account.invoice')
+        res = {}
+
+        if value.get('invoice'):
+            if value.get('account'):
+                invoice = invoice_obj.browse(cursor, user, value['invoice'],
+                        context=context)
+                if invoice.account.id != value['account']:
+                    res['invoice'] = False
+            else:
+                res['invoice'] = False
         return res
 
     def create_move(self, cursor, user, line, context=None):
@@ -209,6 +356,10 @@ class Line(OSV):
         '''
         move_obj = self.pool.get('account.move')
         period_obj = self.pool.get('account.period')
+        invoice_obj = self.pool.get('account.invoice')
+        currency_obj = self.pool.get('currency.currency')
+        move_line_obj = self.pool.get('account.move.line')
+
         period_id = period_obj.find(cursor, user,
                 line.statement.journal.company.id, date=line.date,
                 context=context)
@@ -221,9 +372,32 @@ class Line(OSV):
                 'date': line.date,
                 'lines': [('create', x) for x in move_lines],
              }, context=context)
+
         self.write(cursor, user, line.id, {
             'move': move_id,
             }, context=context)
+
+        if line.invoice:
+            amount = currency_obj.compute(cursor, user,
+                    line.statement.journal.currency, line.amount,
+                    line.statement.journal.company.currency,
+                    context=context)
+
+            reconcile_lines = invoice_obj.get_reconcile_lines_for_amount(cursor,
+                    user, line.invoice, abs(amount))
+
+            move = move_obj.browse(cursor, user, move_id, context=context)
+            line_id = None
+            for move_line in move.lines:
+                if move_line.account.id == line.invoice.account.id:
+                    line_id = move_line.id
+                    invoice_obj.write(cursor, user, line.invoice.id, {
+                        'payment_lines': [('add', line_id)],
+                        }, context=context)
+                    break
+            if reconcile_lines[1] == Decimal('0.0'):
+                line_ids = reconcile_lines[0] + [line_id]
+                move_line_obj.reconcile(cursor, user, line_ids, context=context)
         return move_id
 
     def post_move(self, cursor, user, lines, context=None):
@@ -278,6 +452,9 @@ class Line(OSV):
         if not account:
             self.raise_user_error(cursor, 'debit_credit_account_bank_journal',
                     context=context)
+        if statement_line.account.id == account.id:
+            self.raise_user_error(cursor, 'same_debit_credit_account',
+                    context=context)
         vals.append({
             'name': statement_line.date,
             'debit': amount >= zero and amount or zero,