<s> from itertools import groupby <EOL> from operator import attrgetter <EOL> from corehq . apps . commtrack . processing import compute_ledger_values <EOL> from corehq . form_processor . backends . sql . dbaccessors import LedgerAccessorSQL <EOL> from corehq . form_processor . exceptions import LedgerValueNotFound <EOL> from corehq . form_processor . interfaces . ledger_processor import LedgerProcessorInterface , StockModelUpdateResult , LedgerDBInterface <EOL> from corehq . form_processor . models import LedgerValue , LedgerTransaction <EOL> class LedgerDBSQL ( LedgerDBInterface ) : <EOL> def get_ledgers_for_case ( self , case_id ) : <EOL> return LedgerAccessorSQL . get_ledger_values_for_case ( case_id ) <EOL> def _get_ledger ( self , unique_ledger_reference ) : <EOL> try : <EOL> return LedgerAccessorSQL . get_ledger_value ( ** unique_ledger_reference . _asdict ( ) ) <EOL> except LedgerValueNotFound : <EOL> return None <EOL> def get_current_ledger_value ( self , unique_ledger_reference ) : <EOL> ledger = self . get_ledger ( unique_ledger_reference ) <EOL> return ledger . balance if ledger else <NUM_LIT:0> <EOL> class LedgerProcessorSQL ( LedgerProcessorInterface ) : <EOL> """<STR_LIT>""" <EOL> def get_models_to_update ( self , form_id , stock_report_helpers , deprecated_helpers , ledger_db = None ) : <EOL> ledger_db = ledger_db or LedgerDBSQL ( ) <EOL> result = StockModelUpdateResult ( ) <EOL> ledgers_needing_rebuild = { <EOL> deprecated_transaction . ledger_reference <EOL> for deprecated_helper in deprecated_helpers <EOL> for deprecated_transaction in deprecated_helper . transactions <EOL> } <EOL> updated_ledgers = [ ] <EOL> for helper in stock_report_helpers : <EOL> for stock_trans in helper . transactions : <EOL> ledger_value = self . _process_transaction ( helper , stock_trans , ledger_db ) <EOL> updated_ledgers . append ( ledger_value ) <EOL> for ledger_value in updated_ledgers : <EOL> if ledger_value . ledger_reference in ledgers_needing_rebuild : <EOL> rebuilt_ledger_value = self . _rebuild_ledger ( form_id , ledger_value ) <EOL> result . to_save . append ( rebuilt_ledger_value ) <EOL> else : <EOL> result . to_save . append ( ledger_value ) <EOL> return result <EOL> @ staticmethod <EOL> def _process_transaction ( stock_report_helper , stock_trans , ledger_db ) : <EOL> def _lazy_original_balance ( ) : <EOL> reference = stock_trans . ledger_reference <EOL> return ledger_db . get_current_ledger_value ( reference ) <EOL> new_ledger_values = compute_ledger_values ( <EOL> _lazy_original_balance , stock_report_helper . report_type , stock_trans . relative_quantity <EOL> ) <EOL> ledger_value = ledger_db . get_ledger ( stock_trans . ledger_reference ) <EOL> if not ledger_value : <EOL> ledger_value = LedgerValue ( ** stock_trans . ledger_reference . _asdict ( ) ) <EOL> transaction = _get_ledger_transaction ( <EOL> _lazy_original_balance , <EOL> stock_report_helper , <EOL> stock_trans , <EOL> new_ledger_values . balance <EOL> ) <EOL> ledger_value . track_create ( transaction ) <EOL> ledger_value . balance = new_ledger_values . balance <EOL> return ledger_value <EOL> def _rebuild_ledger ( self , form_id , ledger_value ) : <EOL> """<STR_LIT>""" <EOL> transactions = LedgerAccessorSQL . get_ledger_transactions_for_case ( <EOL> ** ledger_value . ledger_reference . _asdict ( ) <EOL> ) <EOL> transaction_excluding_deprecated_form = [ tx for tx in transactions if tx . form_id != form_id ] <EOL> new_transactions = ledger_value . get_tracked_models_to_create ( LedgerTransaction ) <EOL> all_transactions = transaction_excluding_deprecated_form + new_transactions <EOL> sorted_transactions = sorted ( all_transactions , key = lambda t : t . report_date ) <EOL> ledger_value . clear_tracked_models ( LedgerTransaction ) <EOL> ledger_value = self . _rebuild_ledger_value_from_transactions ( ledger_value , sorted_transactions ) <EOL> return ledger_value <EOL> def rebuild_ledger_state ( self , case_id , section_id , entry_id ) : <EOL> LedgerProcessorSQL . hard_rebuild_ledgers ( case_id , section_id , entry_id ) <EOL> @ staticmethod <EOL> def hard_rebuild_ledgers ( case_id , section_id = None , entry_id = None ) : <EOL> transactions = LedgerAccessorSQL . get_ledger_transactions_for_case ( case_id , section_id , entry_id ) <EOL> ledger_value = LedgerAccessorSQL . get_ledger_value ( case_id , section_id , entry_id ) <EOL> ledger_value = LedgerProcessorSQL . _rebuild_ledger_value_from_transactions ( ledger_value , transactions ) <EOL> LedgerAccessorSQL . save_ledger_values ( [ ledger_value ] ) <EOL> @ staticmethod <EOL> def _rebuild_ledger_value_from_transactions ( ledger_value , transactions ) : <EOL> balance = <NUM_LIT:0> <EOL> for transaction in transactions : <EOL> updated_values = _compute_ledger_values ( balance , transaction ) <EOL> new_balance = updated_values . balance <EOL> new_delta = updated_values . balance - balance <EOL> if new_balance != transaction . updated_balance or new_delta != transaction . delta : <EOL> transaction . delta = new_delta <EOL> transaction . updated_balance = new_balance <EOL> ledger_value . track_update ( transaction ) <EOL> elif not transaction . is_saved ( ) : <EOL> ledger_value . track_create ( transaction ) <EOL> balance = new_balance <EOL> if balance != ledger_value . balance or ledger_value . has_tracked_models ( ) : <EOL> ledger_value . balance = balance <EOL> return ledger_value <EOL> def _compute_ledger_values ( original_balance , transaction ) : <EOL> if transaction . type == LedgerTransaction . TYPE_BALANCE : <EOL> quantity = transaction . updated_balance <EOL> elif transaction . type == LedgerTransaction . TYPE_TRANSFER : <EOL> quantity = transaction . delta <EOL> else : <EOL> raise ValueError ( ) <EOL> ledger_values = compute_ledger_values ( <EOL> lambda : original_balance , transaction . readable_type , quantity <EOL> ) <EOL> return ledger_values <EOL> def _get_ledger_transaction ( lazy_original_balance , stock_report_helper , stock_trans , new_balance ) : <EOL> return LedgerTransaction ( <EOL> form_id = stock_report_helper . form_id , <EOL> server_date = stock_report_helper . server_date , <EOL> report_date = stock_report_helper . timestamp , <EOL> type = _report_type_to_ledger_type ( stock_report_helper . report_type ) , <EOL> case_id = stock_trans . case_id , <EOL> section_id = stock_trans . section_id , <EOL> entry_id = stock_trans . product_id , <EOL> user_defined_type = stock_trans . subaction , <EOL> delta = new_balance - lazy_original_balance ( ) , <EOL> updated_balance = new_balance <EOL> ) <EOL> def _report_type_to_ledger_type ( report_type ) : <EOL> from casexml . apps . stock . const import REPORT_TYPE_BALANCE , REPORT_TYPE_TRANSFER <EOL> if report_type == REPORT_TYPE_BALANCE : <EOL> return LedgerTransaction . TYPE_BALANCE <EOL> if report_type == REPORT_TYPE_TRANSFER : <EOL> return LedgerTransaction . TYPE_TRANSFER <EOL> raise ValueError ( '<STR_LIT>' . format ( report_type ) ) </s>
