|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types = 1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Kauri\Loan; |
|
6
|
|
|
|
|
7
|
|
|
/** |
|
8
|
|
|
* Class PaymentPeriods |
|
9
|
|
|
* @package Kauri\Loan |
|
10
|
|
|
*/ |
|
11
|
|
|
class PaymentPeriods implements PaymentPeriodsInterface |
|
12
|
|
|
{ |
|
13
|
|
|
/** |
|
14
|
|
|
* @var array |
|
15
|
|
|
*/ |
|
16
|
|
|
private $periods = array(); |
|
17
|
|
|
/** |
|
18
|
|
|
* @var int |
|
19
|
|
|
*/ |
|
20
|
|
|
private $averagePeriod; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* PaymentPeriods constructor. |
|
24
|
|
|
* @param int $averagePeriod |
|
25
|
|
|
*/ |
|
26
|
21 |
|
public function __construct(int $averagePeriod) |
|
27
|
|
|
{ |
|
28
|
21 |
|
$this->averagePeriod = $averagePeriod; |
|
29
|
21 |
|
} |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* @param PeriodInterface $period |
|
33
|
|
|
* @param int|null $sequenceNo |
|
34
|
|
|
*/ |
|
35
|
19 |
|
public function add(PeriodInterface $period, int $sequenceNo = null): void |
|
36
|
|
|
{ |
|
37
|
19 |
|
if (is_null($sequenceNo)) { |
|
38
|
16 |
|
$sequenceNo = $this->getNoOfPeriods() + 1; |
|
39
|
|
|
} |
|
40
|
|
|
|
|
41
|
19 |
|
$period->setSequenceNo($sequenceNo); |
|
42
|
19 |
|
$this->periods[$sequenceNo] = $period; |
|
43
|
19 |
|
} |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* @param PeriodInterface $period |
|
47
|
|
|
* @param float $yearlyInterestRate |
|
48
|
|
|
* @param int $calculationType |
|
49
|
|
|
* @param int $calculateFor |
|
50
|
|
|
* @return float |
|
51
|
|
|
* @throws \Exception |
|
52
|
|
|
*/ |
|
53
|
9 |
|
public function getRatePerPeriod( |
|
54
|
|
|
PeriodInterface $period, |
|
55
|
|
|
float $yearlyInterestRate, |
|
56
|
|
|
int $calculationType = self::CALCULATION_MODE_AVERAGE, |
|
57
|
|
|
int $calculateFor = self::CALCULATE_FOR_INTEREST |
|
58
|
|
|
): float { |
|
59
|
|
|
switch ($calculationType) { |
|
60
|
9 |
|
case self::CALCULATION_MODE_EXACT: |
|
61
|
4 |
|
$currentPeriod = $period->getLength(); |
|
62
|
4 |
|
break; |
|
63
|
7 |
|
case self::CALCULATION_MODE_EXACT_INTEREST: |
|
64
|
4 |
|
if ($calculateFor == self::CALCULATE_FOR_INTEREST) { |
|
65
|
3 |
|
$currentPeriod = $period->getLength(); |
|
66
|
|
|
} else { |
|
67
|
1 |
|
$currentPeriod = $this->averagePeriod; |
|
68
|
|
|
} |
|
69
|
4 |
|
break; |
|
70
|
5 |
|
case self::CALCULATION_MODE_AVERAGE: |
|
71
|
4 |
|
$currentPeriod = $this->averagePeriod; |
|
72
|
4 |
|
break; |
|
73
|
|
|
default: |
|
74
|
1 |
|
throw new \Exception('Calculation type not implemented'); |
|
75
|
|
|
} |
|
76
|
|
|
|
|
77
|
8 |
|
$ratePerPeriod = $yearlyInterestRate / 360 * $currentPeriod; |
|
78
|
|
|
|
|
79
|
8 |
|
return $ratePerPeriod; |
|
80
|
|
|
} |
|
81
|
|
|
|
|
82
|
|
|
/** |
|
83
|
|
|
* @param PeriodInterface $period |
|
84
|
|
|
* @param int $calculationType |
|
85
|
|
|
* @param int $calculateFor |
|
86
|
|
|
* @return float |
|
87
|
|
|
* @throws \Exception |
|
88
|
|
|
*/ |
|
89
|
12 |
|
public function getNumberOfPeriods( |
|
90
|
|
|
PeriodInterface $period, |
|
91
|
|
|
int $calculationType = self::CALCULATION_MODE_AVERAGE, |
|
92
|
|
|
int $calculateFor = self::CALCULATE_FOR_PAYMENT |
|
93
|
|
|
): float { |
|
94
|
|
|
switch ($calculationType) { |
|
95
|
12 |
|
case self::CALCULATION_MODE_EXACT: |
|
96
|
7 |
|
$currentPeriod = $period->getLength(); |
|
97
|
7 |
|
$totalPeriods = $this->getExactPeriodsLength(); |
|
98
|
7 |
|
break; |
|
99
|
10 |
|
case self::CALCULATION_MODE_EXACT_INTEREST: |
|
100
|
7 |
|
if ($calculateFor == self::CALCULATE_FOR_PAYMENT) { |
|
101
|
6 |
|
$currentPeriod = $this->averagePeriod; |
|
102
|
6 |
|
$totalPeriods = $this->getAveragePeriodsLength(); |
|
103
|
|
|
} else { |
|
104
|
1 |
|
$currentPeriod = $period->getLength(); |
|
105
|
1 |
|
$totalPeriods = $this->getExactPeriodsLength(); |
|
106
|
|
|
} |
|
107
|
7 |
|
break; |
|
108
|
8 |
|
case self::CALCULATION_MODE_AVERAGE: |
|
109
|
7 |
|
$currentPeriod = $this->averagePeriod; |
|
110
|
7 |
|
$totalPeriods = $this->getAveragePeriodsLength(); |
|
111
|
7 |
|
break; |
|
112
|
|
|
default: |
|
113
|
1 |
|
throw new \Exception('Calculation type not implemented'); |
|
114
|
|
|
} |
|
115
|
|
|
|
|
116
|
11 |
|
$numberOfPeriods = $totalPeriods / $currentPeriod; |
|
117
|
|
|
|
|
118
|
11 |
|
return $numberOfPeriods; |
|
119
|
|
|
} |
|
120
|
|
|
|
|
121
|
|
|
/** |
|
122
|
|
|
* @return int |
|
123
|
|
|
*/ |
|
124
|
10 |
|
public function getExactPeriodsLength() |
|
125
|
|
|
{ |
|
126
|
10 |
|
$followingPeriods = $this->getPeriods(); |
|
127
|
10 |
|
$remainingPeriodsLength = 0; |
|
128
|
|
|
|
|
129
|
|
|
|
|
130
|
10 |
|
foreach ($followingPeriods as $period) { |
|
131
|
10 |
|
$remainingPeriodsLength += $period->getLength(); |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
10 |
|
return $remainingPeriodsLength; |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
/** |
|
138
|
|
|
* @return int |
|
139
|
|
|
*/ |
|
140
|
10 |
|
public function getAveragePeriodsLength() |
|
141
|
|
|
{ |
|
142
|
10 |
|
$followingPeriods = $this->getPeriods(); |
|
143
|
10 |
|
$remainingPeriodsLength = $this->averagePeriod * count($followingPeriods); |
|
144
|
|
|
|
|
145
|
10 |
|
return $remainingPeriodsLength; |
|
146
|
|
|
} |
|
147
|
|
|
|
|
148
|
|
|
/** |
|
149
|
|
|
* @return array |
|
150
|
|
|
*/ |
|
151
|
19 |
|
public function getPeriods(): array |
|
152
|
|
|
{ |
|
153
|
19 |
|
return $this->periods; |
|
154
|
|
|
} |
|
155
|
|
|
|
|
156
|
|
|
/** |
|
157
|
|
|
* @return int |
|
158
|
|
|
*/ |
|
159
|
16 |
|
public function getNoOfPeriods(): int |
|
160
|
|
|
{ |
|
161
|
16 |
|
return count($this->periods); |
|
162
|
|
|
} |
|
163
|
|
|
|
|
164
|
|
|
|
|
165
|
|
|
} |
|
166
|
|
|
|
kaurikk /
loan-payment-period
