|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Siak\Tontine\Service\Meeting\Saving; |
|
4
|
|
|
|
|
5
|
|
|
use Illuminate\Support\Collection; |
|
6
|
|
|
use Siak\Tontine\Model\Fund; |
|
7
|
|
|
use Siak\Tontine\Model\Saving; |
|
8
|
|
|
use Siak\Tontine\Model\Session; |
|
9
|
|
|
use Siak\Tontine\Service\Meeting\Saving\FundService; |
|
10
|
|
|
use Siak\Tontine\Service\Payment\BalanceCalculator; |
|
11
|
|
|
use Siak\Tontine\Service\TenantService; |
|
12
|
|
|
|
|
13
|
|
|
use function gmp_gcd; |
|
14
|
|
|
|
|
15
|
|
|
class ProfitService |
|
16
|
|
|
{ |
|
17
|
|
|
/** |
|
18
|
|
|
* @param BalanceCalculator $balanceCalculator |
|
19
|
|
|
* @param TenantService $tenantService |
|
20
|
|
|
* @param FundService $fundService |
|
21
|
|
|
*/ |
|
22
|
|
|
public function __construct(private BalanceCalculator $balanceCalculator, |
|
23
|
|
|
private TenantService $tenantService, private FundService $fundService) |
|
24
|
|
|
{} |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* @param Collection $sessions |
|
28
|
|
|
* @param Saving $saving |
|
29
|
|
|
* |
|
30
|
|
|
* @return int |
|
31
|
|
|
*/ |
|
32
|
|
|
private function getSavingDuration(Collection $sessions, Saving $saving): int |
|
33
|
|
|
{ |
|
34
|
|
|
// Count the number of sessions before the current one. |
|
35
|
|
|
return $sessions |
|
36
|
|
|
->filter(fn($session) => $session->day_date > $saving->session->day_date) |
|
37
|
|
|
->count(); |
|
38
|
|
|
} |
|
39
|
|
|
|
|
40
|
|
|
/** |
|
41
|
|
|
* @param Collection $values |
|
42
|
|
|
* |
|
43
|
|
|
* @return int |
|
44
|
|
|
*/ |
|
45
|
|
|
private function gcd(Collection $values): int |
|
46
|
|
|
{ |
|
47
|
|
|
return (int)$values->reduce( |
|
48
|
|
|
fn($gcd, $value) => $gcd === 0 || $value === 0 ? 0 : gmp_gcd($gcd, $value), |
|
49
|
|
|
$values->first() |
|
50
|
|
|
); |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* Get the amount corresponding to one part for a given distribution |
|
55
|
|
|
* |
|
56
|
|
|
* @param Distribution $distribution |
|
57
|
|
|
* |
|
58
|
|
|
* @return Distribution |
|
59
|
|
|
*/ |
|
60
|
|
|
private function setDistributions(Distribution $distribution): Distribution |
|
61
|
|
|
{ |
|
62
|
|
|
$sessions = $distribution->sessions; |
|
63
|
|
|
$savings = $distribution->savings; |
|
64
|
|
|
// Set savings durations and distributions |
|
65
|
|
|
foreach($savings as $saving) |
|
66
|
|
|
{ |
|
67
|
|
|
$saving->duration = $this->getSavingDuration($sessions, $saving); |
|
68
|
|
|
// The number of parts is determined by the saving amount and duration. |
|
69
|
|
|
$saving->parts = $saving->amount * $saving->duration; |
|
70
|
|
|
$saving->profit = 0; |
|
71
|
|
|
$saving->percent = 0; |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
$distribution->rewarded = $savings->filter(fn($saving) => $saving->duration > 0); |
|
75
|
|
|
// The value of the unit part is the gcd of the saving amounts. |
|
76
|
|
|
// The distribution values is optimized by using the saving parts value instead |
|
77
|
|
|
// of the amount, but the resulting part amount might be confusing when displayed |
|
78
|
|
|
// to the users since it can be greater than some saving amounts in certain cases. |
|
79
|
|
|
$partsGcd = $this->gcd($distribution->rewarded->pluck('parts')); |
|
80
|
|
|
if($partsGcd > 0) |
|
81
|
|
|
{ |
|
82
|
|
|
$amountGcd = $this->gcd($distribution->rewarded->pluck('amount')); |
|
83
|
|
|
$distribution->partAmount = $amountGcd; |
|
84
|
|
|
|
|
85
|
|
|
$savings->each(function($saving) use($partsGcd, $amountGcd) { |
|
86
|
|
|
$saving->profit = $saving->parts / $partsGcd; |
|
87
|
|
|
$saving->parts /= $amountGcd; |
|
88
|
|
|
}); |
|
89
|
|
|
|
|
90
|
|
|
$profitSum = $savings->sum('profit'); |
|
91
|
|
|
$profitAmount = $distribution->profitAmount; |
|
92
|
|
|
|
|
93
|
|
|
$savings->each(function($saving) use($profitSum, $profitAmount) { |
|
94
|
|
|
$percent = $saving->profit / $profitSum; |
|
95
|
|
|
$saving->percent = $percent * 100; |
|
96
|
|
|
$saving->profit = (int)($profitAmount * $percent); |
|
97
|
|
|
}); |
|
98
|
|
|
} |
|
99
|
|
|
return $distribution; |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
/** |
|
103
|
|
|
* Get the profit distribution for savings. |
|
104
|
|
|
* |
|
105
|
|
|
* @param Session $session |
|
106
|
|
|
* @param Fund $fund |
|
107
|
|
|
* @param int $profitAmount |
|
108
|
|
|
* |
|
109
|
|
|
* @return Distribution |
|
110
|
|
|
*/ |
|
111
|
|
|
public function getDistribution(Session $session, Fund $fund, int $profitAmount): Distribution |
|
112
|
|
|
{ |
|
113
|
|
|
$sessions = $this->fundService->getFundSessions($fund, $session); |
|
114
|
|
|
// Get the savings until the given session. |
|
115
|
|
|
$savings = $fund->savings() |
|
116
|
|
|
->select('savings.*') |
|
117
|
|
|
->join('members', 'members.id', '=', 'savings.member_id') |
|
118
|
|
|
->join('member_defs', 'members.def_id', '=', 'member_defs.id') |
|
119
|
|
|
->join('sessions', 'sessions.id', '=', 'savings.session_id') |
|
120
|
|
|
->whereIn('sessions.id', $sessions->pluck('id')) |
|
121
|
|
|
->orderBy('member_defs.name', 'asc') |
|
122
|
|
|
->orderBy('sessions.day_date', 'asc') |
|
123
|
|
|
->with(['session', 'member']) |
|
124
|
|
|
->get(); |
|
125
|
|
|
|
|
126
|
|
|
$distribution = new Distribution($sessions, $savings, $profitAmount); |
|
127
|
|
|
return $savings->count() === 0 ? $distribution: |
|
128
|
|
|
$this->setDistributions($distribution); |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
|
|
/** |
|
132
|
|
|
* Get the total saving and profit amounts. |
|
133
|
|
|
* |
|
134
|
|
|
* @param Session $session |
|
135
|
|
|
* @param Fund $fund |
|
136
|
|
|
* |
|
137
|
|
|
* @return array<int> |
|
138
|
|
|
*/ |
|
139
|
|
|
public function getSavingAmounts(Session $session, Fund $fund): array |
|
140
|
|
|
{ |
|
141
|
|
|
// Get the ids of all the sessions until the current one. |
|
142
|
|
|
$sessionIds = $this->fundService->getFundSessionIds($fund, $session); |
|
143
|
|
|
return [ |
|
144
|
|
|
'saving' => $this->balanceCalculator->getSavingsAmount($sessionIds, $fund), |
|
145
|
|
|
'refund' => $this->balanceCalculator->getRefundsAmount($sessionIds, $fund) + |
|
146
|
|
|
$this->balanceCalculator->getPartialRefundsAmount($sessionIds, $fund), |
|
147
|
|
|
]; |
|
148
|
|
|
} |
|
149
|
|
|
} |
|
150
|
|
|
|
lagdo /
tontine
