summaryrefslogtreecommitdiffstats
path: root/kppp/ruleset.cpp
blob: 1775b5c24bb5736cccbc39bc05d66393dab11873 (plain)
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
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
/* -*- C++ -*-
 *            kPPP: A pppd front end for the KDE project
 *
 * $Id$
 *
 *            Copyright (C) 1997 Bernd Johannes Wuebben
 *                   wuebben@math.cornell.edu
 *
 * This file was contributed by Mario Weilguni <mweilguni@sime.com>
 * Thanks Mario !
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "ruleset.h"

#include <qregexp.h>
#include <qfile.h>

#include <klocale.h>
#include <kglobal.h>
#include <kdebug.h>

RuleSet::RuleSet() {
  default_costs = -1;
  default_len = -1;
  _currency_symbol = "$";
  _currency_digits = 2;
  _minimum_costs = 0;
  flat_init_costs = 0.0;
  flat_init_duration = 0;
  have_flat_init_costs = false;

  pcf = 0.0;
}

// this function is shamelessly stolen from pppcosts 0.5 :-)
/* calculates the easter sunday in day_of_year style */
QDate RuleSet::get_easter(int year) {
  /* not optimized, I took the original names */
  signed int a,b,m,q,w,p,n,tt,mm;

  /* calculating easter is really funny */
  /* this is O'Beirne's algorithm, only valid 1900-2099 */
  n = year - 1900;
  a = n % 19;
  b = (int)((7*a+1)/19);
  m = (11*a+4-b) % 29;
  q = (int)(n/4);
  w = (n+q+31-m) % 7;
  p = 25-m-w;
  if (p>0)
    {tt=p;
    mm=4;}
  else
    {tt=p+31;
    mm=3;}

  return QDate(year, mm, tt);
}

int RuleSet::dayNameToInt(const char *s) {
  const char *const name[] = {"monday", "tuesday", "wednesday",
			"thursday", "friday", "saturday",
			"sunday", NULL};

  for(int i = 0; name[i] != NULL; i++)
    if(qstricmp(name[i], s) == 0)
      return i;

  return -1;
}

int RuleSet::load(const QString &filename) {

  flat_init_costs = 0.0;
  flat_init_duration = 0;
  have_flat_init_costs = false;

  QFile f(filename);

  // delete old rules
  rules.resize(0);
  _name = "";

  // ignore "No Accounting"
  if(filename.isEmpty())
    return 0;

  if(!f.exists())
    return -1;

  if(!f.open(IO_ReadOnly))
    return -1;

  char buffer[2048]; // safe
  int lineno=0;

  while(!f.atEnd()) {
    // read continued lines
    QString line;
    bool backslashed;
    do {
      int br = f.readLine(buffer, sizeof(buffer));
      if((br > 0) && (buffer[br-1] == '\n'))
	buffer[br-1] = 0;
      else
	buffer[br] = 0;
      lineno++;
      line.append(QString::fromUtf8(buffer));
      backslashed = (line.right(1) == "\\");
    } while(!f.atEnd() && backslashed);

    // strip whitespace
    line = line.replace(QRegExp("[ \t\r]"), "");
    // skip comment lines
    if((line.left(1) == "#") || line.isEmpty())
      continue;

    // parse line
    if(!parseLine(line)) {
      f.close();
      kdError(5002) << "ERROR IN LINE " << lineno << endl;
      return lineno;
    }
  }

  f.close();

  if(_name.length() > 0)
    return 0;
  else {
    kdError(5002) << "NO NAME DEFINED" << endl;
    return -1;
  }
}

void RuleSet::addRule(RULE r) {
  // check for a default rule
  if((r.type == 2) &&
     (r.weekday.from == 0) && (r.weekday.until == 6) &&
     (r.from == midnight()) &&
     (r.until == beforeMidnight()))
    {
      default_costs = r.costs;
      default_len = r.len;
      return;
    }

  // if from < until (i.e on (monday..friday)
  // from (21:00..05:00) use (0.2,16)
  // split it into two rules
  // ... between (21:00..23:59) use ...
  // ... between (00:00..05:00) use ...
  if(r.from > r.until) {
    RULE r1, r2;
    r1 = r;
    r2 = r;
    r1.until = beforeMidnight();
    r2.from = midnight();
    rules.resize(rules.size()+2);
    rules[rules.size()-2] = r1;
    rules[rules.size()-1] = r2;
  } else {
    rules.resize(rules.size()+1);
    rules[rules.size()-1] = r;
  }
}

bool RuleSet::parseEntry(RULE &ret, QString s, int year) {
  if(s.contains(QRegExp("^[0-9]+/[0-9]+$"))) {
    int d, m;
    sscanf(s.ascii(), "%d/%d", &m, &d);
    ret.type = 1;
    ret.date.from = QDate(year, m, d);
    ret.date.until = QDate(year, m, d);
    return TRUE;
  }
  
  if(s.contains(QRegExp("^[0-9]+\\.[0-9]+$"))) {
    int d, m;
    sscanf(s.ascii(), "%d.%d", &d, &m);
    ret.type = 1;
    ret.date.from = QDate(year, m, d);
    ret.date.until = QDate(year, m, d);
    return TRUE;
  }

  if(s.right(3) == "day") {
    int d = dayNameToInt(s.ascii());
    if(d != -1) {
      ret.type = 2;
      ret.weekday.from = d;
      ret.weekday.until = d;
      return TRUE;
    }
  }

  if(s.left(6) == "easter") {
    QDate d = get_easter(year);
    int off;
    bool ok = TRUE;
    QString val = s.mid(6, 1000);
    if(val.isEmpty())
      off = 0;
    else
      off = val.toInt(&ok);

    if(ok) {
      d = d.addDays(off);
      ret.type = 1;
      ret.date.from = d;
      ret.date.until = d;
      return TRUE;
    }
  }

  ret.type = 0;
  return FALSE;
}



bool RuleSet::parseEntries(QString s, int year,
			   QTime t1, QTime t2,
			   double costs, double len, double after)
{
  // special rule: on() is the same as on(monday..sunday)
  if(s.isEmpty())
    s = "monday..sunday";

  while(s.length()) {
    int pos = s.find(',');
    QString token;
    if(pos == -1) {
      token = s;
      s = "";
    } else {
      token = s.left(pos);
      s = s.right(s.length()-pos-1);
    }

    // we've a token, now check if it defines a
    // range
    RULE r;
    if(token.contains("..")) {
      QString left, right;
      left = token.left(token.find(".."));
      right = token.right(token.length()-2-left.length());
      RULE lr, rr;
      if(parseEntry(lr, left, year) && parseEntry(rr, right, year)) {
	if(lr.type == rr.type) {
	  r.type = lr.type;
	  switch(lr.type) {
	  case 1:
	    r.date.from = lr.date.from;
	    r.date.until = rr.date.from;
	    break;
	  case 2:
	    r.weekday.from = lr.weekday.from;
	    r.weekday.until = rr.weekday.from;
	  }
	} else
	  return FALSE;
      }
    } else
      if(!parseEntry(r, token, year))
	return FALSE;

    r.costs = costs;
    r.len = len;
    r.after = after;
    r.from = t1;
    r.until = t2;
    addRule(r);
  }

  return TRUE;
}

bool RuleSet::parseTime(QTime &t1, QTime &t2, QString s) {
  if(s.isEmpty()) {
    t1 = midnight();
    t2 = beforeMidnight();
    return TRUE;
  } else {
    int t1m, t1h, t2m, t2h;
    if(sscanf(s.ascii(), "%d:%d..%d:%d", &t1h, &t1m, &t2h, &t2m) == 4) {
      t1.setHMS(t1h, t1m, 0);
      t2.setHMS(t2h, t2m, 0);
      return TRUE;
    } else
      return FALSE;
  }
}

bool RuleSet::parseRate(double &costs, double &len, double &after, QString s) {
  after = 0;
  int fields = sscanf(s.ascii(), "%lf,%lf,%lf", &costs, &len, &after);
  return (fields == 2) || (fields == 3);
}

bool RuleSet::parseLine(const QString &s) {

  // ### use QRegExp::cap() instead of mid() and find()

  // for our french friends -- Bernd
  if(s.contains(QRegExp("flat_init_costs=\\(.*"))) {
    // parse the time fields
    QString token = s.mid(s.find("flat_init_costs=(") + 17,
			  s.find(")")-s.find("flat_init_costs=(") - 17);
    //    printf("TOKEN=%s\n",token.ascii());

    double after;
    if(!parseRate(flat_init_costs, flat_init_duration, after, token))
      return FALSE;

    //printf("COST %f DURATION %f\n",flat_init_costs,flat_init_duration);

    if(! (flat_init_costs >= 0.0) )
      return FALSE;
    if(! (flat_init_duration >= 0.0))
      return FALSE;

    have_flat_init_costs = true;
    return TRUE;
  }


  if(s.contains(QRegExp("on\\(.*\\)between\\(.*\\)use\\(.*\\)"))) {
    // parse the time fields
    QString token = s.mid(s.find("between(") + 8,
			  s.find(")use")-s.find("between(") - 8);
    QTime t1, t2;
    if(!parseTime(t1, t2, token))
      return FALSE;

    // parse the rate fields
    token = s.mid(s.find("use(") + 4,
			  s.findRev(")")-s.find("use(") - 4);
    double costs;
    double len;
    double after;
    if(!parseRate(costs, len, after, token))
      return FALSE;

    // parse the days
    token = s.mid(s.find("on(") + 3,
		  s.find(")betw")-s.find("on(") - 3);
    if(!parseEntries(token, QDate::currentDate().year(),
		     t1, t2, costs, len, after))
      return FALSE;

    return TRUE;
  }

  // check for the name
  if(s.contains(QRegExp("name=.*"))) {
    _name = s.right(s.length()-5);
    return !_name.isEmpty();
  }


  // check default entry
  if(s.contains(QRegExp("default=\\(.*\\)"))) {
    QString token = s.mid(9, s.length() - 10);
    double after;
    if(parseRate(default_costs, default_len, after, token))
      return TRUE;
  }

  // check for "minimum costs"
  if(s.contains(QRegExp("minimum_costs=.*"))) {
    QString token = s.right(s.length() - strlen("minimum_costs="));
    bool ok;
    _minimum_costs = token.toDouble(&ok);
    return ok;
  }

  // check currency settings
  if(s.startsWith("currency_symbol=")) {
     _currency_symbol = s.mid(16);
     return TRUE;
  }

  if(s.contains(QRegExp("currency_digits=.*"))) {
    QString token = s.mid(16, s.length() - 16);
    bool ok;
    _currency_digits = token.toInt(&ok);
    return ok && (_currency_digits >= 0);
  }

  // "currency_position" is deprecated so we'll simply ignore it
  if(s.contains(QRegExp("currency_position=.*")))
    return TRUE;

  // check per connection fee
  if(s.contains(QRegExp("per_connection="))) {
    QString token = s.mid(15, s.length()-15);
    bool ok;
    pcf = token.toDouble(&ok);
    return ok;
  }

  return FALSE;
}

void RuleSet::setStartTime(QDateTime dt){

  starttime = dt;

}

void RuleSet::getActiveRule(QDateTime dt, double connect_time, double &costs, double &len) {
  // use default costs first
  costs = default_costs;
  len = default_len;

  //printf("In getActiveRule\n");
  if(have_flat_init_costs){

    costs = flat_init_costs;
    len = flat_init_duration;
    have_flat_init_costs = false;
    //printf("getActiveRule FLATINITCOSTS\n");
    return;
  }

  // check every rule
  for(int i = 0; i < (int)rules.size(); i++) {
    RULE r = rules[i];

    switch(r.type) {
    case 1: // a date
      {
	// since rules do not have a year's entry, use the one
	// from dt
	QDate from = r.date.from;
	QDate until = r.date.until;
	from.setYMD(dt.date().year(), from.month(), from.day());
	until.setYMD(dt.date().year(), until.month(), until.day());
	if((from <= dt.date()) && (dt.date() <= until)) {
	  // check time
	  if((r.from <= dt.time()) && (dt.time() <= r.until) && (connect_time >= r.after)) {
	    costs = r.costs;
	    len = r.len;
	  }
	}
      }
    break;

    case 2: // one or more weekdays
      // check if the range overlaps sunday.
      // (i.e. "on(saturday..monday)")
      if(r.weekday.from <= r.weekday.until) {
	if((r.weekday.from <= dt.date().dayOfWeek() - 1) &&
	   (r.weekday.until >= dt.date().dayOfWeek() - 1))
	  {
	    // check time
	    if((r.from <= dt.time()) && (dt.time() <= r.until) && (connect_time >= r.after)) {
	      costs = r.costs;
	      len = r.len;
	    }
	  }
      } else { // yes, they overlap sunday
	if((r.weekday.from >= dt.date().dayOfWeek() - 1) &&
	   (dt.date().dayOfWeek() - 1 <= r.weekday.until))
	  {
	    // check time
	    if((r.from <= dt.time()) && (dt.time() <= r.until) && (connect_time >= r.after)) {
	      costs = r.costs;
	      len = r.len;
	    }
	  }
      }
    }
  }
}


#if 0
static double round(double d, int digits) {
  d *= pow(10, digits);
  d = rint(d);
  d /= pow(10, digits);
  return d;
}
#endif

QString RuleSet::currencySymbol() const {
  return _currency_symbol.copy();
}

QString RuleSet::currencyString(double f) const {
  return KGlobal::locale()->formatMoney(f, _currency_symbol, _currency_digits);
}


double RuleSet::perConnectionCosts() const {
  return pcf;
}


QString RuleSet::name() const {
  return _name;
}


double RuleSet::minimumCosts() const {
  return _minimum_costs;
}

QTime RuleSet::midnight() const {
  return QTime(0, 0, 0, 0);
}

QTime RuleSet::beforeMidnight() const {
  return QTime(23,59,59,999);
}

int RuleSet::checkRuleFile(const QString &rulefile) {
  if(rulefile == NULL) {
    fputs(i18n("kppp: no rulefile specified\n").local8Bit(), stderr);
    return 1;
  }

  QFile fl(rulefile);
  if(!fl.exists()) {
    fprintf(stderr, i18n("kppp: rulefile \"%s\" not found\n").local8Bit(), rulefile.local8Bit().data());
    return 1;
  }

  if(rulefile.right(4) != ".rst") {
    fputs(i18n("kppp: rulefiles must have the extension \".rst\"\n").local8Bit(), stderr);
    return 1;
  }

  RuleSet r;
  int err = r.load(rulefile);
  fl.close();

  if(err == -1) {
    fputs(i18n("kppp: error parsing the ruleset\n").local8Bit(), stderr);
    return 1;
  }

  if(err > 0) {
    fprintf(stderr, i18n("kppp: parse error in line %d\n").local8Bit(), err);
    return 1;
  }

  // check for the existance of a default rule
  if((r.default_costs < 0) || (r.default_len < 0)) {
    fputs(i18n("kppp: rulefile does not contain a default rule\n").local8Bit(), stderr);
    return 1;
  }

  if(r.name().length() == 0) {
    fputs(i18n("kppp: rulefile does not contain a \"name=...\" line\n").local8Bit(), stderr);
    return 1;
  }

  fputs(i18n("kppp: rulefile is ok\n").local8Bit(), stderr);
  return 0;
}