amfnengine 0.3.5

Amortization Functions (AmFn) Engine
Documentation
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
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
//! Result definition of the last call to balance the cashflow.
// Copyright (c) 2021 ShiftLeft Software
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use std::cell::Cell;

use rust_decimal::prelude::*;

pub struct ElemBalanceResult {
    /// Total number of TYPE_PRINCIPAL_CHANGEs with statistics set.
    prin_total: usize,
    /// Number of TYPE_PRINCIPAL_CHANGEs following first current value present with statistics set.
    prin_present: usize,
    /// Total compounded interest charged not including any remaining interest.
    interest_total: Decimal,
    /// Compounded interest following first current value present.
    interest_present: Decimal,
    /// Total straight-line interest charged not including any remaining interest.
    sl_interest_total: Decimal,
    /// Straight-line interest following first current value present.
    sl_interest_present: Decimal,
    /// Final accrued interest balance.
    acc_balance: Decimal,
    /// Final balance.
    balance: Decimal,
    /// Final balance date.
    balance_date: usize,
    /// Total value of TYPE_PRINCIPAL_CHANGE decreases without auxiliary set.
    prin_decrease: Decimal,
    /// Total value of TYPE_PRINCIPAL_CHANGE increases without auxiliary set.
    prin_increase: Decimal,
    /// Value of active TYPE_PRINCIPAL_CHANGE decreases with auxiliary set.
    aux_active_decrease: Decimal,
    /// Value of active TYPE_PRINCIPAL_CHANGE increases with auxiliary set.
    aux_active_increase: Decimal,
    /// Value of passive TYPE_PRINCIPAL_CHANGE decreases with auxiliary set.
    aux_passive_decrease: Decimal,
    /// Value of passive TYPE_PRINCIPAL_CHANGE increases with auxiliary set.
    aux_passive_increase: Decimal,
    /// -1 = Negative cashflow, 1 = Positive cashflow.
    polarity: i32,
    /// Accrued interest balance seen.
    acc_balance_seen: bool,
    /// Rule of 78 seen.
    rule_of_78_seen: bool,

    /// First principal change.
    prin_first_index: usize,
    /// First principal change with statistics set.
    prin_first_stat_index: usize,
    /// First principal change after PV.
    prin_first_pv_index: usize,
    /// First principal change with statistics set after PV.
    prin_first_stat_pv_index: usize,
    /// Last principal change.
    prin_last_index: usize,
    /// Last principal change with statistics set.
    prin_last_stat_index: usize,
    /// First current value with PV set.
    cur_first_pv_index: usize,
    /// First interest change.
    int_first_index: usize,
    /// Last interest change.
    int_last_index: usize,

    /// Result yield.
    result_yield: Cell<Decimal>,
    /// Result decimal.
    result_decimal: Cell<Decimal>,
    /// Result integer.
    result_integer: Cell<i32>,
}

/// Balance result definition default implementation.

impl Default for ElemBalanceResult {
    /// Create a new balance result definition.
    ///
    /// # Return
    ///
    /// * See description.

    fn default() -> Self {
        ElemBalanceResult::new()
    }
}

/// Balance result definition implementation.

impl ElemBalanceResult {
    /// Create a new balance result definition.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn new() -> ElemBalanceResult {
        ElemBalanceResult {
            prin_total: 0,
            prin_present: 0,
            interest_total: dec!(0.0),
            interest_present: dec!(0.0),
            sl_interest_total: dec!(0.0),
            sl_interest_present: dec!(0.0),
            acc_balance: dec!(0.0),
            balance: dec!(0.0),
            balance_date: 0,
            prin_decrease: dec!(0.0),
            prin_increase: dec!(0.0),
            aux_active_decrease: dec!(0.0),
            aux_active_increase: dec!(0.0),
            aux_passive_decrease: dec!(0.0),
            aux_passive_increase: dec!(0.0),
            polarity: 1,
            acc_balance_seen: false,
            rule_of_78_seen: false,
            prin_first_index: usize::MAX,
            prin_first_stat_index: usize::MAX,
            prin_first_pv_index: usize::MAX,
            prin_first_stat_pv_index: usize::MAX,
            prin_last_index: usize::MAX,
            prin_last_stat_index: usize::MAX,
            cur_first_pv_index: usize::MAX,
            int_first_index: usize::MAX,
            int_last_index: usize::MAX,
            result_yield: Cell::new(dec!(0.0)),
            result_decimal: Cell::new(dec!(0.0)),
            result_integer: Cell::new(0),
        }
    }

    /// Copy this result definition as a new result definition.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn copy(&self) -> ElemBalanceResult {
        ElemBalanceResult {
            prin_total: self.prin_total,
            prin_present: self.prin_present,
            interest_total: self.interest_total,
            interest_present: self.interest_present,
            sl_interest_total: self.sl_interest_total,
            sl_interest_present: self.sl_interest_present,
            acc_balance: self.acc_balance,
            balance: self.balance,
            balance_date: self.balance_date,
            prin_decrease: self.prin_decrease,
            prin_increase: self.prin_increase,
            aux_active_decrease: self.aux_active_decrease,
            aux_active_increase: self.aux_active_increase,
            aux_passive_decrease: self.aux_passive_decrease,
            aux_passive_increase: self.aux_passive_increase,
            polarity: self.polarity,
            acc_balance_seen: self.acc_balance_seen,
            rule_of_78_seen: self.rule_of_78_seen,
            prin_first_index: self.prin_first_index,
            prin_first_stat_index: self.prin_first_stat_index,
            prin_first_pv_index: self.prin_first_pv_index,
            prin_first_stat_pv_index: self.prin_first_stat_pv_index,
            prin_last_index: self.prin_last_index,
            prin_last_stat_index: self.prin_last_stat_index,
            cur_first_pv_index: self.cur_first_pv_index,
            int_first_index: self.int_first_index,
            int_last_index: self.int_last_index,
            result_yield: Cell::new(self.result_yield()),
            result_decimal: Cell::new(self.result_decimal()),
            result_integer: Cell::new(self.result_integer()),
        }
    }

    /// Clear all values.

    pub fn clear(&mut self) {
        self.prin_total = 0;
        self.prin_present = 0;
        self.interest_total = dec!(0.0);
        self.interest_present = dec!(0.0);
        self.sl_interest_total = dec!(0.0);
        self.sl_interest_present = dec!(0.0);
        self.acc_balance = dec!(0.0);
        self.balance = dec!(0.0);
        self.balance_date = 0;
        self.prin_decrease = dec!(0.0);
        self.prin_increase = dec!(0.0);
        self.aux_active_decrease = dec!(0.0);
        self.aux_active_increase = dec!(0.0);
        self.aux_passive_decrease = dec!(0.0);
        self.aux_passive_increase = dec!(0.0);
        self.polarity = 1; // Positive CF
        self.acc_balance_seen = false;
        self.rule_of_78_seen = false;
        self.prin_first_index = usize::MAX;
        self.prin_first_stat_index = usize::MAX;
        self.prin_first_pv_index = usize::MAX;
        self.prin_first_stat_pv_index = usize::MAX;
        self.prin_last_index = usize::MAX;
        self.prin_last_stat_index = usize::MAX;
        self.cur_first_pv_index = usize::MAX;
        self.int_first_index = usize::MAX;
        self.int_last_index = usize::MAX;
    }

    /// Get the total number of TYPE_PRINCIPAL_CHANGEs with statistics set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_total(&self) -> usize {
        self.prin_total
    }

    /// Get the number of TYPE_PRINCIPAL_CHANGEs following first current value
    /// present with statistics set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_present(&self) -> usize {
        self.prin_present
    }

    /// Get the total compounded interest charged not including any remaining interest.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn interest_total(&self) -> Decimal {
        self.interest_total
    }

    /// Get the compounded interest following first current value present.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn interest_present(&self) -> Decimal {
        self.interest_present
    }

    /// Get the total straight-line interest charged not including any remaining interest.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn sl_interest_total(&self) -> Decimal {
        self.sl_interest_total
    }

    /// Get the straight-line interest following first current value present.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn sl_interest_present(&self) -> Decimal {
        self.sl_interest_present
    }

    /// Get the final accrued interest balance.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn acc_balance(&self) -> Decimal {
        self.acc_balance
    }

    /// Get the final balance.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn balance(&self) -> Decimal {
        self.balance
    }

    /// Get the final balance date.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn balance_date(&self) -> usize {
        self.balance_date
    }

    /// Get the total value of TYPE_PRINCIPAL_CHANGE decreases without auxiliary set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_decrease(&self) -> Decimal {
        self.prin_decrease
    }

    /// Get the total value of TYPE_PRINCIPAL_CHANGE increases without auxiliary set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_increase(&self) -> Decimal {
        self.prin_increase
    }

    /// Get the value of active TYPE_PRINCIPAL_CHANGE decreases with auxiliary set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn aux_active_decrease(&self) -> Decimal {
        self.aux_active_decrease
    }

    /// Get the value of active TYPE_PRINCIPAL_CHANGE increases with auxiliary set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn aux_active_increase(&self) -> Decimal {
        self.aux_active_increase
    }

    /// Get the value of passive TYPE_PRINCIPAL_CHANGE decreases with auxiliary set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn aux_passive_decrease(&self) -> Decimal {
        self.aux_passive_decrease
    }

    /// Get the value of passive TYPE_PRINCIPAL_CHANGE increases with auxiliary set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn aux_passive_increase(&self) -> Decimal {
        self.aux_passive_increase
    }

    /// Get the polarity of the cashflow.
    ///
    /// # Return
    ///
    /// * -1=Negative cashflow, 1=Positive cashflow.

    pub fn polarity(&self) -> i32 {
        self.polarity
    }

    /// Get the accrued interest balance seen.
    ///
    /// # Return
    ///
    /// * True if accrued interest balance seen, otherwise false.

    pub fn acc_balance_seen(&self) -> bool {
        self.acc_balance_seen
    }

    /// Get the Rule of 78 seen.
    ///
    /// # Return
    ///
    /// * True if rule of 78 seen, otherwise false.

    pub fn rule_of_78_seen(&self) -> bool {
        self.rule_of_78_seen
    }

    /// Get the first principal change.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_first_index(&self) -> usize {
        self.prin_first_index
    }

    /// Get the first principal change with statistics set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_first_stat_index(&self) -> usize {
        self.prin_first_stat_index
    }

    /// Get the first principal change after PV.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_first_pv_index(&self) -> usize {
        self.prin_first_pv_index
    }

    /// Get the first principal change with statistics set after PV.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_first_stat_pv_index(&self) -> usize {
        self.prin_first_stat_pv_index
    }

    /// Get the last principal change.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_last_index(&self) -> usize {
        self.prin_last_index
    }

    /// Get the last principal change with statistics set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn prin_last_stat_index(&self) -> usize {
        self.prin_last_stat_index
    }

    /// Get the first current value with PV set.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn cur_first_pv_index(&self) -> usize {
        self.cur_first_pv_index
    }

    /// Get the first interest change.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn int_first_index(&self) -> usize {
        self.int_first_index
    }

    /// Get the last interest change.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn int_last_index(&self) -> usize {
        self.int_last_index
    }

    /// Get the result yield.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn result_yield(&self) -> Decimal {
        self.result_yield.get()
    }

    /// Get the result decimal.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn result_decimal(&self) -> Decimal {
        self.result_decimal.get()
    }

    /// Get the result integer.
    ///
    /// # Return
    ///
    /// * See description.

    pub fn result_integer(&self) -> i32 {
        self.result_integer.get()
    }

    /// Increment the total number of TYPE_PRINCIPAL_CHANGEs with statistics set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_prin_total(&mut self, param: usize) {
        self.prin_total += param;
    }

    /// Increment the number of TYPE_PRINCIPAL_CHANGEs following first current
    /// value present with statistics set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_prin_present(&mut self, param: usize) {
        self.prin_present += param;
    }

    /// Increment the total compounded interest charged not including any
    /// remaining interest.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_interest_total(&mut self, param: Decimal) {
        self.interest_total += param;
    }

    /// Increment the compounded interest following first current value
    /// present not including any remaining interest.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_interest_present(&mut self, param: Decimal) {
        self.interest_present += param;
    }

    /// Increment the total straight-line interest charged not including
    /// any remaining interest.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_sl_interest_total(&mut self, param: Decimal) {
        self.sl_interest_total += param;
    }

    /// Increment the straight-line interest following first current
    /// value present not including any remaining interest.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_sl_interest_present(&mut self, param: Decimal) {
        self.sl_interest_present += param;
    }

    /// Increment the total value of TYPE_PRINCIPAL_CHANGE decreases
    /// without auxiliary set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_prin_decrease(&mut self, param: Decimal) {
        self.prin_decrease += param;
    }

    /// Increment the total value of TYPE_PRINCIPAL_CHANGE increases
    /// without auxiliary set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_prin_increase(&mut self, param: Decimal) {
        self.prin_increase += param;
    }

    /// Increment the value of active TYPE_PRINCIPAL_CHANGE decreases
    /// with auxiliary set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_aux_active_decrease(&mut self, param: Decimal) {
        self.aux_active_decrease += param;
    }

    /// Increment the value of active TYPE_PRINCIPAL_CHANGE increases
    /// with auxiliary set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_aux_active_increase(&mut self, param: Decimal) {
        self.aux_active_increase += param;
    }

    /// Increment the value of passive TYPE_PRINCIPAL_CHANGE decreases
    /// with auxiliary set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_aux_passive_decrease(&mut self, param: Decimal) {
        self.aux_passive_decrease += param;
    }

    /// Increment the value of passive TYPE_PRINCIPAL_CHANGE increases
    /// with auxiliary set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn incr_aux_passive_increase(&mut self, param: Decimal) {
        self.aux_passive_increase += param;
    }

    /// Set the final accrued interest balance.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_acc_balance(&mut self, param: Decimal) {
        self.acc_balance = param;
    }

    /// Set the final balance.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_balance(&mut self, param: Decimal) {
        self.balance = param;
    }

    /// Set the final balance date.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_balance_date(&mut self, param: usize) {
        self.balance_date = param;
    }

    /// Set the polarity of the cashflow.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_polarity(&mut self, param: i32) {
        self.polarity = param;
    }

    /// Set the accrued interest balance seen.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_acc_balance_seen(&mut self, param: bool) {
        self.acc_balance_seen = param;
    }

    /// Set the rule of 78 seen.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_rule_of_78_seen(&mut self, param: bool) {
        self.rule_of_78_seen = param;
    }

    /// Set the first principal change.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_prin_first_index(&mut self, param: usize) {
        self.prin_first_index = param;
    }

    /// Set the first principal change with statistics set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_prin_first_stat_index(&mut self, param: usize) {
        self.prin_first_stat_index = param;
    }

    /// Set the first principal change after PV.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_prin_first_pv_index(&mut self, param: usize) {
        self.prin_first_pv_index = param;
    }

    /// Set the first principal change with statistics set after PV.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_prin_first_stat_pv_index(&mut self, param: usize) {
        self.prin_first_stat_pv_index = param;
    }

    /// Set the last principal change.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_prin_last_index(&mut self, param: usize) {
        self.prin_last_index = param;
    }

    /// Set the last principal change with statistics set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_prin_last_stat_index(&mut self, param: usize) {
        self.prin_last_stat_index = param;
    }

    /// Set the first current value with PV set.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_cur_first_pv_index(&mut self, param: usize) {
        self.cur_first_pv_index = param;
    }

    /// Set the first interest change.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_int_first_index(&mut self, param: usize) {
        self.int_first_index = param;
    }

    /// Set the last interest change.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_int_last_index(&mut self, param: usize) {
        self.int_last_index = param;
    }

    /// Set the result yield.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_result_yield(&self, param: Decimal) {
        self.result_yield.set(param);
    }

    /// Set the result decimal.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_result_decimal(&self, param: Decimal) {
        self.result_decimal.set(param);
    }

    /// Set the result integer.
    ///
    /// # Arguments
    ///
    /// * `param` - See description.

    pub fn set_result_integer(&self, param: i32) {
        self.result_integer.set(param);
    }
}