Put /history[-range] logic in a dedicate file.
This commit is contained in:
Marcello Stanisci
parent
9fc380f7c8
commit
e13a8902f0
1
.gitignore
vendored
1
.gitignore
vendored
@ -115,3 +115,4 @@ src/bank-lib/test_bank_api_twisted
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src/lib/test_exchange_api_new
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src/lib/test_auditor_api
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src/lib/test_exchange_api_overlapping_keys_bug
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src/lib/test_exchange_api_home/.local/share/taler/exchange/revocations/
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@ -57,6 +57,7 @@ libtalerfakebank_la_LDFLAGS = \
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-no-undefined
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libtalerfakebank_la_SOURCES = \
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fakebank_history.c \
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fakebank.c
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libtalerfakebank_la_LIBADD = \
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File diff suppressed because it is too large
Load Diff
322
src/bank-lib/fakebank.h
Normal file
322
src/bank-lib/fakebank.h
Normal file
@ -0,0 +1,322 @@
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/*
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This file is part of TALER
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(C) 2016, 2017, 2018 Inria and GNUnet e.V.
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TALER is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 3,
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or (at your option) any later version.
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TALER is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public
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License along with TALER; see the file COPYING. If not,
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see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file bank-lib/fakebank.h
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* @brief definitions for the "/history[-range]" layer.
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* @author Marcello Stanisci <stanisci.m@gmail.com>
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*/
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#ifndef FAKEBANK_H
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#define FAKEBANK_H
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#include "platform.h"
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#include <gnunet/gnunet_util_lib.h>
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#include "taler_bank_service.h"
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/**
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* Details about a transcation we (as the simulated bank) received.
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*/
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struct Transaction
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{
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/**
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* We store transactions in a DLL.
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*/
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struct Transaction *next;
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/**
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* We store transactions in a DLL.
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*/
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struct Transaction *prev;
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/**
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* Amount to be transferred.
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*/
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struct TALER_Amount amount;
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/**
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* Account to debit.
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*/
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uint64_t debit_account;
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/**
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* Account to credit.
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*/
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uint64_t credit_account;
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/**
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* Subject of the transfer.
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*/
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char *subject;
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/**
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* Base URL of the exchange.
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*/
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char *exchange_base_url;
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/**
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* When did the transaction happen?
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*/
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struct GNUNET_TIME_Absolute date;
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/**
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* Number of this transaction.
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*/
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uint64_t row_id;
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/**
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* Flag set if the transfer was rejected.
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*/
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int rejected;
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/**
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* Has this transaction been subjected to #TALER_FAKEBANK_check()
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* and should thus no longer be counted in
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* #TALER_FAKEBANK_check_empty()?
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*/
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int checked;
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};
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/******************************************
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* Definitions for "/history" start here. *
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******************************************/
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/**
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* Needed to implement ascending/descending ordering
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* of /history results.
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*/
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struct HistoryElement
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{
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/**
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* History JSON element.
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*/
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json_t *element;
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/**
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* Previous element.
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*/
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struct HistoryElement *prev;
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/**
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* Next element.
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*/
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struct HistoryElement *next;
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};
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/**
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* Values to implement the "/history-range" range.
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*/
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struct HistoryRangeDates
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{
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/**
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* Oldest row in the results.
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*/
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struct GNUNET_TIME_Absolute start;
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/**
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* Youngest row in the results.
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*/
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struct GNUNET_TIME_Absolute end;
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};
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/**
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* Values to implement the "/history" range.
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*/
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struct HistoryRangeIds
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{
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/**
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* (Exclusive) row ID for the result set.
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*/
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unsigned long long start;
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/**
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* How many transactions we want in the result set. If
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* negative/positive, @a start will be strictly younger/older
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* of any element in the result set.
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*/
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long long count;
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};
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/**
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* This is the "base" structure for both the /history and the
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* /history-range API calls.
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*/
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struct HistoryArgs
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{
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/**
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* Direction asked by the client: CREDIT / DEBIT / BOTH / CANCEL.
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*/
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enum TALER_BANK_Direction direction;
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/**
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* Bank account number of the requesting client.
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*/
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unsigned long long account_number;
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/**
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* Ordering of the results.
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*/
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unsigned int ascending;
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/**
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* Overloaded type that indicates the "range" to be returned
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* in the results; this can be either a date range, or a
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* starting row id + the count.
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*/
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void *range;
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};
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/**
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* Type for a function that decides whether or not
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* the history-building loop should iterate once again.
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* Typically called from inside the 'while' condition.
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*
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* @param ha history argument.
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* @param pos current position.
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* @return GNUNET_YES if the iteration shuold go on.
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*/
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typedef int (*CheckAdvance)
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(const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/**
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* Type for a function that steps over the next element
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* in the list of all transactions, after the current @a pos
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* _got_ included in the result.
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*/
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typedef struct Transaction * (*Step)
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(const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/*
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* Type for a function that steps over the next element
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* in the list of all transactions, after the current @a pos
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* did _not_ get included in the result.
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*/
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typedef struct Transaction * (*Skip)
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(const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/**
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* Actual history response builder.
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*
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* @param pos first (included) element in the result set.
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* @param ha history arguments.
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* @param caller_name which function is building the history.
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* @return MHD_YES / MHD_NO, after having enqueued the response
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* object into MHD.
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*/
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int
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TFH_build_history_response (struct MHD_Connection *connection,
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struct Transaction *pos,
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struct HistoryArgs *ha,
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Skip skip,
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Step step,
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CheckAdvance advance);
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/**
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* Parse URL history arguments, of _both_ APIs:
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* /history and /history-range.
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*
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* @param connection MHD connection.
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* @param function_name name of the caller.
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* @param ha[out] will contain the parsed values.
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* @return GNUNET_OK only if the parsing succeedes.
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*/
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int
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TFH_parse_history_common_args (struct MHD_Connection *connection,
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struct HistoryArgs *ha);
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/**
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* Decides whether the history builder will advance or not
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* to the next element.
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*
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* @param ha history args
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* @return GNUNET_YES/NO to advance/not-advance.
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*/
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int
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TFH_handle_history_advance (const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/**
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* Iterates on the "next" element to be processed. To
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* be used when the current element does not get inserted in
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* the result.
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*
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* @param ha history arguments.
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* @param pos current element being processed.
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* @return the next element to be processed.
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*/
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struct Transaction *
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TFH_handle_history_skip (const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/**
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* Iterates on the "next" element to be processed. To
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* be used when the current element _gets_ inserted in the result.
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*
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* @param ha history arguments.
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* @param pos current element being processed.
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* @return the next element to be processed.
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*/
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struct Transaction *
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TFH_handle_history_step (const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/**
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* Decides whether the history builder will advance or not
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* to the next element.
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*
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* @param ha history args
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* @return GNUNET_YES/NO to advance/not-advance.
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*/
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int
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TFH_handle_history_range_advance (const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/**
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* Iterates towards the "next" element to be processed. To
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* be used when the current element does not get inserted in
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* the result.
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*
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* @param ha history arguments.
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* @param pos current element being processed.
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* @return the next element to be processed.
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*/
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struct Transaction *
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TFH_handle_history_range_skip (const struct HistoryArgs *ha,
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const struct Transaction *pos);
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/**
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* Iterates on the "next" element to be processed. To
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* be used when the current element _gets_ inserted in the result.
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* Same implementation of the "skip" counterpart, as /history-range
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* does not have the notion of count/delta.
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*/
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Step TFH_handle_history_range_step;
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#endif
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427
src/bank-lib/fakebank_history.c
Normal file
427
src/bank-lib/fakebank_history.c
Normal file
@ -0,0 +1,427 @@
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/*
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This file is part of TALER
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(C) 2016, 2017, 2018 Inria and GNUnet e.V.
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TALER is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 3,
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or (at your option) any later version.
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TALER is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public
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License along with TALER; see the file COPYING. If not,
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see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file bank-lib/fakebank_history.c
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* @brief definitions for the "/history[-range]" layer.
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* @author Marcello Stanisci <stanisci.m@gmail.com>
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*/
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#include "platform.h"
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#include <gnunet/gnunet_util_lib.h>
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#include "taler_json_lib.h"
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#include "fakebank.h"
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/**
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* Decides whether the history builder will advance or not
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* to the next element.
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*
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* @param ha history args
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* @return GNUNET_YES/NO to advance/not-advance.
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*/
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int
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TFH_handle_history_advance (const struct HistoryArgs *ha,
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const struct Transaction *pos)
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{
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const struct HistoryRangeIds *hri = ha->range;
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return (NULL != pos) && (0 != hri->count);
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}
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/**
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* Iterates on the "next" element to be processed. To
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* be used when the current element does not get inserted in
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* the result.
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*
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* @param ha history arguments.
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* @param pos current element being processed.
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* @return the next element to be processed.
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*/
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struct Transaction *
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TFH_handle_history_skip (const struct HistoryArgs *ha,
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const struct Transaction *pos)
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{
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const struct HistoryRangeIds *hri = ha->range;
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if (hri->count > 0)
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return pos->next;
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if (hri->count < 0)
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return pos->prev;
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return NULL;
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}
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/**
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* Iterates on the "next" element to be processed. To
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* be used when the current element _gets_ inserted in the result.
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*
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* @param ha history arguments.
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* @param pos current element being processed.
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* @return the next element to be processed.
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*/
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struct Transaction *
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TFH_handle_history_step (const struct HistoryArgs *ha,
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const struct Transaction *pos)
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{
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struct HistoryRangeIds *hri = ha->range;
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if (hri->count > 0)
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{
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hri->count--;
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return pos->next;
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}
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if (hri->count < 0)
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{
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hri->count++;
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return pos->prev;
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}
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return NULL;
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}
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/**
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* Decides whether the history builder will advance or not
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* to the next element.
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*
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* @param ha history args
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* @return GNUNET_YES/NO to advance/not-advance.
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*/
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int
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TFH_handle_history_range_advance (const struct HistoryArgs *ha,
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const struct Transaction *pos)
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{
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const struct HistoryRangeDates *hrd = ha->range;
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if ( (NULL != pos) &&
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(pos->date.abs_value_us <= hrd->end.abs_value_us) )
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return GNUNET_YES;
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return GNUNET_NO;
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}
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/**
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* Iterates towards the "next" element to be processed. To
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* be used when the current element does not get inserted in
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* the result.
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*
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* @param ha history arguments.
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* @param pos current element being processed.
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* @return the next element to be processed.
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*/
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struct Transaction *
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TFH_handle_history_range_skip (const struct HistoryArgs *ha,
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const struct Transaction *pos)
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{
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/* Transactions
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* are stored from "head"/older to "tail"/younger. */
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return pos->next;
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}
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/**
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* Iterates on the "next" element to be processed. To
|
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* be used when the current element _gets_ inserted in the result.
|
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* Same implementation of the "skip" counterpart, as /history-range
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* does not have the notion of count/delta.
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*/
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Step TFH_handle_history_range_step = &TFH_handle_history_range_skip;
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/**
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* Actual history response builder.
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*
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* @param pos first (included) element in the result set.
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* @param ha history arguments.
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* @param caller_name which function is building the history.
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* @return MHD_YES / MHD_NO, after having enqueued the response
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* object into MHD.
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*/
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int
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TFH_build_history_response (struct MHD_Connection *connection,
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struct Transaction *pos,
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struct HistoryArgs *ha,
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Skip skip,
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Step step,
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CheckAdvance advance)
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{
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struct HistoryElement *history_results_head = NULL;
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struct HistoryElement *history_results_tail = NULL;
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struct HistoryElement *history_element = NULL;
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json_t *history;
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json_t *jresponse;
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int ret;
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while (advance (ha,
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pos))
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{
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json_t *trans;
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char *subject;
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const char *sign;
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GNUNET_log (GNUNET_ERROR_TYPE_INFO,
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"Found transaction over %s from %llu to %llu\n",
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TALER_amount2s (&pos->amount),
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(unsigned long long) pos->debit_account,
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(unsigned long long) pos->credit_account);
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if ( (! ( ( (ha->account_number == pos->debit_account) &&
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(0 != (ha->direction & TALER_BANK_DIRECTION_DEBIT)) ) ||
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( (ha->account_number == pos->credit_account) &&
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(0 != (ha->direction & TALER_BANK_DIRECTION_CREDIT) ) ) ) ) ||
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( (0 == (ha->direction & TALER_BANK_DIRECTION_CANCEL)) &&
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(GNUNET_YES == pos->rejected) ) )
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{
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pos = skip (ha,
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pos);
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continue;
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}
|
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GNUNET_asprintf (&subject,
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"%s %s",
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pos->subject,
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pos->exchange_base_url);
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sign =
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(ha->account_number == pos->debit_account)
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? (pos->rejected ? "cancel-" : "-")
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: (pos->rejected ? "cancel+" : "+");
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trans = json_pack
|
||||
("{s:I, s:o, s:o, s:s, s:I, s:s}",
|
||||
"row_id", (json_int_t) pos->row_id,
|
||||
"date", GNUNET_JSON_from_time_abs (pos->date),
|
||||
"amount", TALER_JSON_from_amount (&pos->amount),
|
||||
"sign", sign,
|
||||
"counterpart", (json_int_t)
|
||||
( (ha->account_number == pos->debit_account)
|
||||
? pos->credit_account
|
||||
: pos->debit_account),
|
||||
"wt_subject", subject);
|
||||
GNUNET_assert (NULL != trans);
|
||||
GNUNET_free (subject);
|
||||
|
||||
history_element = GNUNET_new (struct HistoryElement);
|
||||
history_element->element = trans;
|
||||
|
||||
|
||||
/* XXX: the ordering feature is missing. */
|
||||
|
||||
GNUNET_CONTAINER_DLL_insert_tail (history_results_head,
|
||||
history_results_tail,
|
||||
history_element);
|
||||
pos = step (ha, pos);
|
||||
}
|
||||
|
||||
history = json_array ();
|
||||
if (NULL != history_results_head)
|
||||
history_element = history_results_head;
|
||||
|
||||
while (NULL != history_element)
|
||||
{
|
||||
json_array_append_new (history,
|
||||
history_element->element);
|
||||
history_element = history_element->next;
|
||||
if (NULL != history_element)
|
||||
GNUNET_free_non_null (history_element->prev);
|
||||
}
|
||||
GNUNET_free_non_null (history_results_tail);
|
||||
|
||||
if (0 == json_array_size (history))
|
||||
{
|
||||
struct MHD_Response *resp;
|
||||
|
||||
json_decref (history);
|
||||
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
|
||||
"Returning empty transaction history\n");
|
||||
resp = MHD_create_response_from_buffer
|
||||
(0,
|
||||
"",
|
||||
MHD_RESPMEM_PERSISTENT);
|
||||
ret = MHD_queue_response (connection,
|
||||
MHD_HTTP_NO_CONTENT,
|
||||
resp);
|
||||
MHD_destroy_response (resp);
|
||||
return ret;
|
||||
}
|
||||
|
||||
jresponse = json_pack ("{s:o}",
|
||||
"data",
|
||||
history);
|
||||
if (NULL == jresponse)
|
||||
{
|
||||
GNUNET_break (0);
|
||||
return MHD_NO;
|
||||
}
|
||||
|
||||
/* Finally build response object */
|
||||
{
|
||||
struct MHD_Response *resp;
|
||||
void *json_str;
|
||||
size_t json_len;
|
||||
|
||||
json_str = json_dumps (jresponse,
|
||||
JSON_INDENT(2));
|
||||
json_decref (jresponse);
|
||||
if (NULL == json_str)
|
||||
{
|
||||
GNUNET_break (0);
|
||||
return MHD_NO;
|
||||
}
|
||||
json_len = strlen (json_str);
|
||||
resp = MHD_create_response_from_buffer (json_len,
|
||||
json_str,
|
||||
MHD_RESPMEM_MUST_FREE);
|
||||
if (NULL == resp)
|
||||
{
|
||||
GNUNET_break (0);
|
||||
free (json_str);
|
||||
return MHD_NO;
|
||||
}
|
||||
(void) MHD_add_response_header (resp,
|
||||
MHD_HTTP_HEADER_CONTENT_TYPE,
|
||||
"application/json");
|
||||
ret = MHD_queue_response (connection,
|
||||
MHD_HTTP_OK,
|
||||
resp);
|
||||
MHD_destroy_response (resp);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse URL history arguments, of _both_ APIs:
|
||||
* /history and /history-range.
|
||||
*
|
||||
* @param connection MHD connection.
|
||||
* @param function_name name of the caller.
|
||||
* @param ha[out] will contain the parsed values.
|
||||
* @return GNUNET_OK only if the parsing succeedes.
|
||||
*/
|
||||
int
|
||||
TFH_parse_history_common_args (struct MHD_Connection *connection,
|
||||
struct HistoryArgs *ha)
|
||||
{
|
||||
/**
|
||||
* @variable
|
||||
* Just check if given and == "basic", no need to keep around.
|
||||
*/
|
||||
const char *auth;
|
||||
|
||||
/**
|
||||
* All those will go into the structure, after parsing.
|
||||
*/
|
||||
const char *direction;
|
||||
const char *cancelled;
|
||||
const char *ordering;
|
||||
const char *account_number;
|
||||
|
||||
|
||||
auth = MHD_lookup_connection_value (connection,
|
||||
MHD_GET_ARGUMENT_KIND,
|
||||
"auth");
|
||||
direction = MHD_lookup_connection_value (connection,
|
||||
MHD_GET_ARGUMENT_KIND,
|
||||
"direction");
|
||||
cancelled = MHD_lookup_connection_value (connection,
|
||||
MHD_GET_ARGUMENT_KIND,
|
||||
"cancelled");
|
||||
ordering = MHD_lookup_connection_value (connection,
|
||||
MHD_GET_ARGUMENT_KIND,
|
||||
"ordering");
|
||||
account_number = MHD_lookup_connection_value
|
||||
(connection,
|
||||
MHD_GET_ARGUMENT_KIND,
|
||||
"account_number");
|
||||
|
||||
/* Fail if one of the above failed. */
|
||||
if ( (NULL == direction) ||
|
||||
(NULL == cancelled) ||
|
||||
( (0 != strcasecmp (cancelled,
|
||||
"OMIT")) &&
|
||||
(0 != strcasecmp (cancelled,
|
||||
"SHOW")) ) ||
|
||||
( (0 != strcasecmp (direction,
|
||||
"BOTH")) &&
|
||||
(0 != strcasecmp (direction,
|
||||
"CREDIT")) &&
|
||||
(0 != strcasecmp (direction,
|
||||
"DEBIT")) ) ||
|
||||
(1 != sscanf (account_number,
|
||||
"%llu",
|
||||
&ha->account_number)) ||
|
||||
( (NULL == auth) || (0 != strcasecmp (auth,
|
||||
"basic")) ) )
|
||||
{
|
||||
/* Invalid request, given that this is fakebank we impolitely
|
||||
* just kill the connection instead of returning a nice error.
|
||||
*/
|
||||
GNUNET_break (0);
|
||||
return GNUNET_NO;
|
||||
}
|
||||
|
||||
if (0 == strcasecmp (direction,
|
||||
"CREDIT"))
|
||||
{
|
||||
ha->direction = TALER_BANK_DIRECTION_CREDIT;
|
||||
}
|
||||
else if (0 == strcasecmp (direction,
|
||||
"DEBIT"))
|
||||
{
|
||||
ha->direction = TALER_BANK_DIRECTION_DEBIT;
|
||||
}
|
||||
else if (0 == strcasecmp (direction,
|
||||
"BOTH"))
|
||||
{
|
||||
ha->direction = TALER_BANK_DIRECTION_BOTH;
|
||||
}
|
||||
|
||||
/* Direction is invalid. */
|
||||
else
|
||||
{
|
||||
GNUNET_break (0);
|
||||
return GNUNET_NO;
|
||||
}
|
||||
|
||||
if (0 == strcasecmp (cancelled,
|
||||
"OMIT"))
|
||||
{
|
||||
/* nothing */
|
||||
} else if (0 == strcasecmp (cancelled,
|
||||
"SHOW"))
|
||||
{
|
||||
ha->direction |= TALER_BANK_DIRECTION_CANCEL;
|
||||
}
|
||||
|
||||
/* Cancel-showing policy is invalid. */
|
||||
else
|
||||
{
|
||||
GNUNET_break (0);
|
||||
return GNUNET_NO;
|
||||
}
|
||||
|
||||
if ((NULL != ordering)
|
||||
&& 0 == strcmp ("ascending",
|
||||
ordering))
|
||||
ha->ascending = GNUNET_YES;
|
||||
else
|
||||
ha->ascending = GNUNET_NO;
|
||||
|
||||
return GNUNET_OK;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user