1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* database.cc
*
* Thu Sep 6 10:59:07 CEST 2007
* Copyright 2007 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of Pracro.
*
* Pracro is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Pracro is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pracro; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "database.h"
Database::Database(std::string hostname, std::string user, std::string password)
: c("host=" + hostname + " user=" + user + " password=" + password + " dbname=pracro")
{
}
Database::~Database()
{
}
void Database::commit(std::string user,
std::string cpr,
Macro &_macro,
Fields &fields,
time_t now)
{
// / Create transaction ID (transaction OID?)
// {
// \ Commit transaction data
// Commit all field values using transaction ID.
// INSERT INTO transactions VALUES('cpr', 'macro', 'version', 'timestamp', 'user')
// Returns INSERT oid count
// count == 1, oid is oid of newly inserted transaction.
// INSERT INTO fields VALUES('oid', 'field', 'value')
std::string version = _macro.attributes["version"];
std::string macro = _macro.attributes["name"];
std::stringstream timestamp; timestamp << now;
pqxx::work W(c);
std::string ts =
"INSERT INTO transactions"
" VALUES('"+cpr+"', '"+macro+"', '"+version+"', '"+timestamp.str()+"', '"+user+"')";
pqxx::result R = W.exec(ts);
std::stringstream oid; oid << R.inserted_oid();
std::map< std::string, std::string >::iterator i = fields.begin();
while(i != fields.end()) {
std::string fs =
"INSERT INTO fields"
" VALUES('"+oid.str()+"', '"+i->first+"', '"+i->second+"')";
W.exec(fs);
i++;
}
W.commit();
#if 0
try {
pqxx::work W(c);
// ...
W.commit();
} catch(const std::exception &e) {
// throw PostgreSQLException(e.what());
}
#endif/*0*/
}
Values Database::getValues(std::string cpr,
Fieldnames &fields,
time_t oldest)
{
Values values;
pqxx::work W(c);
std::stringstream query;
query << "SELECT fields.name, fields.value, transactions.timestamp";
query << " FROM fields, transactions";
query << " WHERE transactions.cpr = '" << cpr << "'";
query << " AND transactions.oid = fields.transaction";
query << " AND transactions.timestamp >= " << oldest;
std::vector< std::string >::iterator i = fields.begin();
bool first = true;
while(i != fields.end()) {
if(first) query << " AND ( fields.name = '" << (*i) << "'";
else query << " OR fields.name = '" << (*i) << "'";
first = false;
i++;
}
query << ")";
query << " ORDER BY transactions.timestamp";
pqxx::result R = W.exec(query.str());
pqxx::result::const_iterator ri = R.begin();
while(ri != R.end()) {
pqxx::result::tuple t = *ri;
Value v;
v.value = t[1].c_str();
v.timestamp = atol(t[2].c_str());
if(values.find(t[0].c_str()) == values.end() ||
(values.find(t[0].c_str()) != values.end() &&
values[t[0].c_str()].timestamp <= v.timestamp) ) {
values[t[0].c_str()] = v;
}
ri++;
}
return values;
}
bool Database::checkMacro(std::string cpr,
std::string macro,
time_t oldest)
{
pqxx::work W(c);
std::stringstream query;
query << "SELECT oid";
query << " FROM transactions";
query << " WHERE cpr = '" << cpr << "'";
query << " AND macro = '" << macro << "'";
query << " AND timestamp >= " << oldest;
query << " ORDER BY timestamp";
try {
pqxx::result R = W.exec(query.str());
return R.size() != 0;
} catch( ... ) {
return false;
}
}
/*
-- As root:
-- #createuser -P -h localhost -U postgres
-- #createdb -U postgres -h localhost pracro
DROP DATABASE pracro;
CREATE DATABASE pracro
WITH OWNER = pracro
ENCODING = 'UNICODE'
TABLESPACE = pg_default;
DROP TABLE transactions;
CREATE TABLE transactions
(
"cpr" varchar(11),
"macro" text,
"version" text,
"timestamp" bigint,
"user" text
)
WITH OIDS;
ALTER TABLE transactions OWNER TO pracro;
DROP TABLE fields;
CREATE TABLE fields
(
"transaction" oid,
"name" text,
"value" text
)
WITH OIDS;
ALTER TABLE fields OWNER TO pracro;
-- primary key(oid) ??
*/
#ifdef TEST_DATABASE
int main()
{
Database db;
time_t now = time(NULL);
Macro macro;
macro.attributes["name"] = "testmacro";
macro.attributes["version"] = "1.0";
Fields fields;
fields["themeaning"] = "42";
fields["microsoft"] = "waste of money";
db.commit("testuser", "1505050505", macro, fields, now);
std::vector< std::string > fieldnames;
fieldnames.push_back("microsoft");
fieldnames.push_back("themeaning");
Values results = db.getValues("1505050505", fieldnames, now);
Values::iterator i = results.begin();
while(i != results.end()) {
Value v = i->second;
printf("%s -> %s (%u)\n", i->first.c_str(), v.value.c_str(), (unsigned int)v.timestamp);
i++;
}
}
#endif/*TEST_DATABASE*/
|
