forked from cgrates/cgrates
-
Notifications
You must be signed in to change notification settings - Fork 0
/
userbalance.go
472 lines (439 loc) · 12.2 KB
/
userbalance.go
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
/*
Rating system designed to be used in VoIP Carriers World
Copyright (C) 2013 ITsysCOM
This program 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 3 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>
*/
package engine
import (
"errors"
"github.com/cgrates/cgrates/utils"
"sort"
"strings"
"time"
)
const (
UB_TYPE_POSTPAID = "*postpaid"
UB_TYPE_PREPAID = "*prepaid"
// Direction type
INBOUND = "*in"
OUTBOUND = "*out"
// Balance types
CREDIT = "*monetary"
SMS = "*sms"
TRAFFIC = "*internet"
TRAFFIC_TIME = "*internet_time"
MINUTES = "*minutes"
)
var (
AMOUNT_TOO_BIG = errors.New("Amount excedes balance!")
)
/*
Structure containing information about user's credit (minutes, cents, sms...).'
*/
type UserBalance struct {
Id string
Type string // prepaid-postpaid
BalanceMap map[string]BalanceChain
MinuteBuckets []*MinuteBucket
UnitCounters []*UnitsCounter
ActionTriggers ActionTriggerPriotityList
}
type Balance struct {
Id string
Value float64
ExpirationDate time.Time
Weight float64
}
func (b *Balance) Equal(o *Balance) bool {
return b.ExpirationDate.Equal(o.ExpirationDate) ||
b.Weight == o.Weight
}
func (b *Balance) IsExpired() bool {
return !b.ExpirationDate.IsZero() && b.ExpirationDate.Before(time.Now())
}
func (b *Balance) Clone() *Balance {
return &Balance{
Id: b.Id,
Value: b.Value,
ExpirationDate: b.ExpirationDate,
Weight: b.Weight,
}
}
/*
Structure to store minute buckets according to weight, precision or price.
*/
type BalanceChain []*Balance
func (bc BalanceChain) Len() int {
return len(bc)
}
func (bc BalanceChain) Swap(i, j int) {
bc[i], bc[j] = bc[j], bc[i]
}
func (bc BalanceChain) Less(j, i int) bool {
return bc[i].Weight < bc[j].Weight
}
func (bc BalanceChain) Sort() {
sort.Sort(bc)
}
func (bc BalanceChain) GetTotalValue() (total float64) {
for _, b := range bc {
if !b.IsExpired() {
total += b.Value
}
}
return
}
func (bc BalanceChain) Debit(amount float64) float64 {
bc.Sort()
for i, b := range bc {
if b.IsExpired() {
continue
}
if b.Value >= amount || i == len(bc)-1 { // if last one go negative
b.Value -= amount
break
}
b.Value = 0
amount -= b.Value
}
return bc.GetTotalValue()
}
func (bc BalanceChain) Equal(o BalanceChain) bool {
if len(bc) != len(o) {
return false
}
bc.Sort()
o.Sort()
for i := 0; i < len(bc); i++ {
if !bc[i].Equal(o[i]) {
return false
}
}
return true
}
func (bc BalanceChain) Clone() BalanceChain {
var newChain BalanceChain
for _, b := range bc {
newChain = append(newChain, b.Clone())
}
return newChain
}
/*
Returns user's available minutes for the specified destination
*/
func (ub *UserBalance) getSecondsForPrefix(prefix string) (seconds, credit float64, bucketList bucketsorter) {
credit = ub.BalanceMap[CREDIT+OUTBOUND].GetTotalValue()
if len(ub.MinuteBuckets) == 0 {
// Logger.Debug("There are no minute buckets to check for user: ", ub.Id)
return
}
for _, mb := range ub.MinuteBuckets {
if mb.IsExpired() {
continue
}
d, err := GetDestination(mb.DestinationId)
if err != nil {
continue
}
if precision, ok := d.containsPrefix(prefix); ok {
mb.precision = precision
if mb.Seconds > 0 {
bucketList = append(bucketList, mb)
}
}
}
bucketList.Sort() // sorts the buckets according to priority, precision or price
for _, mb := range bucketList {
s := mb.GetSecondsForCredit(credit)
credit -= s * mb.Price
seconds += s
}
return
}
// Debit seconds from specified minute bucket
func (ub *UserBalance) debitMinuteBucket(newMb *MinuteBucket) error {
if newMb == nil {
return errors.New("Nil minute bucket!")
}
found := false
for _, mb := range ub.MinuteBuckets {
if mb.IsExpired() {
continue
}
if mb.Equal(newMb) {
mb.Seconds -= newMb.Seconds
found = true
break
}
}
// if it is not found and the Seconds are negative (topup)
// then we add it to the list
if !found && newMb.Seconds <= 0 {
newMb.Seconds = -newMb.Seconds
ub.MinuteBuckets = append(ub.MinuteBuckets, newMb)
}
return nil
}
/*
Debits the received amount of seconds from user's minute buckets.
All the appropriate buckets will be debited until all amount of minutes is consumed.
If the amount is bigger than the sum of all seconds in the minute buckets than nothing will be
debited and an error will be returned.
*/
func (ub *UserBalance) debitMinutesBalance(amount float64, prefix string, count bool) error {
if count {
ub.countUnits(&Action{BalanceId: MINUTES, Direction: OUTBOUND, MinuteBucket: &MinuteBucket{Seconds: amount, DestinationId: prefix}})
}
avaliableNbSeconds, _, bucketList := ub.getSecondsForPrefix(prefix)
if avaliableNbSeconds < amount {
return AMOUNT_TOO_BIG
}
var credit BalanceChain
if bc, exists := ub.BalanceMap[CREDIT+OUTBOUND]; exists {
credit = bc.Clone()
}
for _, mb := range bucketList {
if mb.Seconds < amount {
if mb.Price > 0 { // debit the money if the bucket has price
credit.Debit(mb.Seconds * mb.Price)
}
} else {
if mb.Price > 0 { // debit the money if the bucket has price
credit.Debit(amount * mb.Price)
}
break
}
if ub.Type == UB_TYPE_PREPAID && credit.GetTotalValue() < 0 {
break
}
}
// need to check again because there are two break above
if ub.Type == UB_TYPE_PREPAID && credit.GetTotalValue() < 0 {
return AMOUNT_TOO_BIG
}
ub.BalanceMap[CREDIT+OUTBOUND] = credit // credit is > 0
for _, mb := range bucketList {
if mb.Seconds < amount {
amount -= mb.Seconds
mb.Seconds = 0
} else {
mb.Seconds -= amount
break
}
}
return nil
}
// Debits some amount of user's specified balance adding the balance if it does not exists.
// Returns the remaining credit in user's balance.
func (ub *UserBalance) debitBalanceAction(a *Action) float64 {
newBalance := &Balance{
Id: utils.GenUUID(),
ExpirationDate: a.ExpirationDate,
Weight: a.Weight,
}
found := false
id := a.BalanceId + a.Direction
for _, b := range ub.BalanceMap[id] {
if b.Equal(newBalance) {
b.Value -= a.Units
found = true
}
}
if !found {
newBalance.Value -= a.Units
ub.BalanceMap[id] = append(ub.BalanceMap[id], newBalance)
}
return ub.BalanceMap[a.BalanceId+OUTBOUND].GetTotalValue()
}
/*
Debits some amount of user's specified balance. Returns the remaining credit in user's balance.
*/
func (ub *UserBalance) debitBalance(balanceId string, amount float64, count bool) float64 {
if count {
ub.countUnits(&Action{BalanceId: balanceId, Direction: OUTBOUND, Units: amount})
}
ub.BalanceMap[balanceId+OUTBOUND].Debit(amount)
return ub.BalanceMap[balanceId+OUTBOUND].GetTotalValue()
}
// Scans the action trigers and execute the actions for which trigger is met
func (ub *UserBalance) executeActionTriggers(a *Action) {
ub.ActionTriggers.Sort()
for _, at := range ub.ActionTriggers {
if at.Executed {
// trigger is marked as executed, so skipp it until
// the next reset (see RESET_TRIGGERS action type)
continue
}
if a != nil && (at.BalanceId != a.BalanceId ||
at.Direction != a.Direction ||
(a.MinuteBucket != nil &&
(at.ThresholdType != a.MinuteBucket.PriceType ||
at.ThresholdValue != a.MinuteBucket.Price))) {
continue
}
if strings.Contains(at.ThresholdType, "counter") {
for _, uc := range ub.UnitCounters {
if uc.BalanceId == at.BalanceId {
if at.BalanceId == MINUTES && at.DestinationId != "" { // last check adds safety
for _, mb := range uc.MinuteBuckets {
if strings.Contains(at.ThresholdType, "*max") {
if mb.DestinationId == at.DestinationId && mb.Seconds >= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
} else { //MIN
if mb.DestinationId == at.DestinationId && mb.Seconds <= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
}
}
} else {
if strings.Contains(at.ThresholdType, "*max") {
if uc.Units >= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
} else { //MIN
if uc.Units <= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
}
}
}
}
} else { // BALANCE
for _, b := range ub.BalanceMap[at.BalanceId] {
if at.BalanceId == MINUTES && at.DestinationId != "" { // last check adds safety
for _, mb := range ub.MinuteBuckets {
if strings.Contains(at.ThresholdType, "*max") {
if mb.DestinationId == at.DestinationId && mb.Seconds >= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
} else { //MIN
if mb.DestinationId == at.DestinationId && mb.Seconds <= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
}
}
} else {
if strings.Contains(at.ThresholdType, "*max") {
if b.Value >= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
} else { //MIN
if b.Value <= at.ThresholdValue {
// run the actions
at.Execute(ub)
}
}
}
}
}
}
}
// Mark all action trigers as ready for execution
// If the action is not nil it acts like a filter
func (ub *UserBalance) resetActionTriggers(a *Action) {
for _, at := range ub.ActionTriggers {
if a != nil && (at.BalanceId != a.BalanceId ||
at.Direction != a.Direction ||
(a.MinuteBucket != nil &&
(at.ThresholdType != a.MinuteBucket.PriceType ||
at.ThresholdValue != a.MinuteBucket.Price))) {
continue
}
at.Executed = false
}
ub.executeActionTriggers(a)
}
// Returns the unit counter that matches the specified action type
func (ub *UserBalance) getUnitCounter(a *Action) *UnitsCounter {
for _, uc := range ub.UnitCounters {
direction := a.Direction
if direction == "" {
direction = OUTBOUND
}
if uc.BalanceId == a.BalanceId && uc.Direction == direction {
return uc
}
}
return nil
}
// Increments the counter for the type specified in the received Action
// with the actions values
func (ub *UserBalance) countUnits(a *Action) {
unitsCounter := ub.getUnitCounter(a)
// if not found add the counter
if unitsCounter == nil {
direction := a.Direction
if direction == "" {
direction = OUTBOUND
}
unitsCounter = &UnitsCounter{BalanceId: a.BalanceId, Direction: direction}
ub.UnitCounters = append(ub.UnitCounters, unitsCounter)
}
if a.BalanceId == MINUTES && a.MinuteBucket != nil {
unitsCounter.addMinutes(a.MinuteBucket.Seconds, a.MinuteBucket.DestinationId)
} else {
unitsCounter.Units += a.Units
}
ub.executeActionTriggers(nil)
}
// Create minute counters for all triggered actions that have actions operating on minute buckets
func (ub *UserBalance) initMinuteCounters() {
ucTempMap := make(map[string]*UnitsCounter, 2)
for _, at := range ub.ActionTriggers {
acs, err := storageGetter.GetActions(at.ActionsId)
if err != nil {
continue
}
for _, a := range acs {
if a.MinuteBucket != nil {
direction := at.Direction
if direction == "" {
direction = OUTBOUND
}
uc, exists := ucTempMap[direction]
if !exists {
uc = &UnitsCounter{BalanceId: MINUTES, Direction: direction}
ucTempMap[direction] = uc
uc.MinuteBuckets = bucketsorter{}
ub.UnitCounters = append(ub.UnitCounters, uc)
}
uc.MinuteBuckets = append(uc.MinuteBuckets, a.MinuteBucket.Clone())
uc.MinuteBuckets.Sort()
}
}
}
}
func (ub *UserBalance) CleanExpiredBalancesAndBuckets() {
for key, _ := range ub.BalanceMap {
bm := ub.BalanceMap[key]
for i := 0; i < len(bm); i++ {
if bm[i].IsExpired() {
// delete it
bm = append(bm[:i], bm[i+1:]...)
}
}
ub.BalanceMap[key] = bm
}
for i := 0; i < len(ub.MinuteBuckets); i++ {
if ub.MinuteBuckets[i].IsExpired() {
ub.MinuteBuckets = append(ub.MinuteBuckets[:i], ub.MinuteBuckets[i+1:]...)
}
}
}