DebtCalculator::getSimpleInterestAmount() - Code Metrics - lagdo/tontine - Measure and Improve Code Quality continuously with Scrutinizer

DebtCalculator::getSimpleInterestAmount() A
last analyzed 2025-11-03 02:04 UTC

↳ Parent: DebtCalculator

Complexity

Conditions	2
Paths	2

Size

Total Lines	27
Code Lines	16

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	2
eloc	16
nc	2
nop	2
dl	0
loc	27
rs	9.7333
c	1
b	0
f	0

<?php

namespace Siak\Tontine\Service\Meeting\Credit;

use Closure;
use Illuminate\Support\Collection;
use Siak\Tontine\Model\Debt;
use Siak\Tontine\Model\PartialRefund;
use Siak\Tontine\Model\Refund;
use Siak\Tontine\Model\Session;

use function pow;

class DebtCalculator
{
    /**
     * Count the sessions.
     *
     * @param Debt $debt
     * @param Session $fromSession The session to start from
     * @param Session $toSession The session to end to
     *
     * @return int
     */
    private function getSessionCount(Debt $debt, Session $fromSession, Session $toSession): int
    {
        return $debt->loan->fund->sessions
            ->filter(fn($session) => $session->day_date <= $toSession->day_date &&
                $session->day_date > $fromSession->day_date)
            ->count();
    }

    /**
     * Get the last session for interest calculation
     *
     * @param Debt $debt
     * @param Session $currentSession
     *
     * @return Session
     */
    private function getLastSession(Debt $debt, Session $currentSession): Session
    {
        return $debt->refund &&
            $debt->refund->session->day_date < $currentSession->day_date ?
            $debt->refund->session : $currentSession;
    }

    /**
     * @param Session $current
     * @param bool $withCurrent Also take the refunds in the current session.
     *
     * @return Closure
     */
    private function getRefundFilter(Session $current, bool $withCurrent): Closure
    {
        return !$withCurrent ?
            fn(PartialRefund|Refund $refund) => $refund->session->day_date < $current->day_date :
            fn(PartialRefund|Refund $refund) => $refund->session->day_date <= $current->day_date;
    }

    /**
     * @param Debt $debt
     * @param Session $current
     * @param bool $withCurrent Also take the refunds in the current session.
     *
     * @return Collection
     */
    private function getPartialRefunds(Debt $debt, Session $current, bool $withCurrent): Collection
    {
        return $debt->partial_refunds->filter($this->getRefundFilter($current, $withCurrent));
    }

    /**
     * @param Debt $debt
     * @param Session $current
     *
     * @return Session
     */
    private function getLastSessionForInterest(Debt $debt, Session $current): Session
    {
        $endSession = $debt->loan->fund->interest;
        return $current->day_date < $endSession->day_date ? $current : $endSession;
    }

    /**
     * Get the simple interest amount.
     *
     * @param Debt $debt
     * @param Session $session
     *
     * @return int
     */
    private function getSimpleInterestAmount(Debt $debt, Session $session): int
    {
        $principalDebt = $debt->loan->principal_debt;
        $loanAmount = $principalDebt->amount;
        // The interest rate is multiplied by 100 in the database.
        $interestRate = $debt->loan->interest_rate / 10000;
        $interestAmount = 0;

        $startSession = $debt->loan->session;
        $endSession = $this->getLastSessionForInterest($debt, $session);

        // Take refunds before the end session and sort by session date.
        $partialRefunds = $this->getPartialRefunds($principalDebt, $endSession, false)
            ->sortBy('session.day_date');
        foreach($partialRefunds as $refund)
        {
            $sessionCount = $this->getSessionCount($debt, $startSession, $refund->session);
            $interestAmount += (int)($loanAmount * $interestRate * $sessionCount);
            // For the next loop
            $loanAmount -= $refund->amount;
            $startSession = $refund->session;
        }

        $lastSession = $this->getLastSession($principalDebt, $endSession);
        $sessionCount = $this->getSessionCount($debt, $startSession, $lastSession);

        return $interestAmount + (int)($loanAmount * $interestRate * $sessionCount);
    }

    /**
     * Get the compound interest amount.
     *
     * @param Debt $debt
     * @param Session $session
     *
     * @return int
     */
    private function getCompoundInterestAmount(Debt $debt, Session $session): int
    {
        $principalDebt = $debt->loan->principal_debt;
        $loanAmount = $principalDebt->amount;
        // The interest rate is multiplied by 100 in the database.
        $interestRate = $debt->loan->interest_rate / 10000;
        $interestAmount = 0;

        $startSession = $debt->loan->session;
        $endSession = $this->getLastSessionForInterest($debt, $session);

        // Take refunds before the current session and sort by session date.
        $partialRefunds = $this->getPartialRefunds($principalDebt, $endSession, false)
            ->sortBy('session.day_date');
        foreach($partialRefunds as $refund)
        {
            $sessionCount = $this->getSessionCount($debt, $startSession, $refund->session);
            $interestAmount += (int)($loanAmount * (pow(1 + $interestRate, $sessionCount) - 1));
            // For the next loop
            $loanAmount -= $refund->amount - $interestAmount;
            $startSession = $refund->session;
        }

        $lastSession = $this->getLastSession($principalDebt, $endSession);
        $sessionCount = $this->getSessionCount($debt, $startSession, $lastSession);

        return $interestAmount + (int)($loanAmount * (pow(1 + $interestRate, $sessionCount) - 1));
    }

    /**
     * @param Debt $debt
     *
     * @return bool
     */
    private function debtAmountIsFixed(Debt $debt): bool
    {
        // The amount in a debt model is fixed if it is a principal debt,
        // or it is an interest debt with fixed amount or unique interest rate.
        return $debt->is_principal || !$debt->loan->recurrent_interest;

    }

    /**
     * Get the amount of a given debt.
     *
     * @param Debt $debt
     * @param Session $session
     *
     * @return int
     */
    public function getDebtAmount(Debt $debt, Session $session): int
    {
        return $this->debtAmountIsFixed($debt) ? $debt->amount :
            ($debt->loan->simple_interest ?
                $this->getSimpleInterestAmount($debt, $session) :
                $this->getCompoundInterestAmount($debt, $session));
    }

    /**
     * Get the paid amount for a given debt at a given session.
     *
     * @param Debt $debt
     * @param Session $session
     * @param bool $withCurrent Take the current session into account.
     *
     * @return int
     */
    public function getDebtPaidAmount(Debt $debt, Session $session, bool $withCurrent): int
    {
        $refundFilter = $this->getRefundFilter($session, $withCurrent);
        return ($debt->refund !== null && $refundFilter($debt->refund)) ? $debt->amount :
            $this->getPartialRefunds($debt, $session, $withCurrent)->sum('amount');
    }

    /**
     * Get the amount due of a given debt before the given session.
     *
     * @param Debt $debt
     * @param Session $session
     * @param bool $withCurrent Take the current session into account.
     *
     * @return int
     */
    public function getDebtDueAmount(Debt $debt, Session $session, bool $withCurrent): int
    {
        $refundFilter = $this->getRefundFilter($session, $withCurrent);
        if($debt->refund !== null && $refundFilter($debt->refund))
        {
            return 0; // The debt was refunded before the current session.
        }

        return $this->getDebtAmount($debt, $session) -
            $this->getPartialRefunds($debt, $session, $withCurrent)->sum('amount');
    }

    /**
     * Get the max amount that can be paid for a given debt at a given session.
     *
     * @param Debt $debt
     * @param Session $session
     *
     * @return int
     */
    public function getDebtPayableAmount(Debt $debt, Session $session): int
    {
        return $this->getDebtDueAmount($debt, $session, false);
    }

    /**
     * Get the total refunded amount.
     *
     * @param Debt $debt
     *
     * @return int
     */
    public function getDebtTotalPaidAmount(Debt $debt): int
    {
        return $debt->refund !== null ? $debt->amount : $debt->partial_refunds->sum('amount');
    }

    /**
     * Get the amount due after the current session
     *
     * @param Debt $debt
     * @param Session $session
     * @param int $dueBefore
     *
     * @return int
     */
    private function getAmountDueAfter(Debt $debt, Session $session, int $dueBefore): int
    {
        $refundFilter = $this->getRefundFilter($session, true);
        if($debt->refund !== null && $refundFilter($debt->refund))
        {
            return 0; // The debt was refunded before the current session.
        }

        return $dueBefore - ($debt->partial_refund?->amount ?? 0);
    }

    /**
     * @param Debt $debt
     * @param Session $session
     *
     * @return array
     */
    public function getAmounts(Debt $debt, Session $session): array
    {
        // The total debt amount.
        $debtAmount = $this->getDebtAmount($debt, $session);
        // The total paid amount.
        $totalPaidAmount = $this->getDebtTotalPaidAmount($debt);
        // The amount paid before the session.
        $paidAmount = $this->getDebtPaidAmount($debt, $session, false);
        // The amount due before the session;
        $amountDueBefore = $debtAmount - $paidAmount;
        // The amount due after the session;
        $amountDueAfter = $this->getAmountDueAfter($debt, $session, $amountDueBefore);

        return [
            'debt' => $debt,
            'session' => $session,
            'debtAmount' => $debtAmount,
            'totalPaidAmount' => $totalPaidAmount,
            'paidAmount' => $paidAmount,
            'amountDueBeforeSession' => $amountDueBefore,
            'amountDueAfterSession' => $amountDueAfter,
            'payableAmount' => $amountDueBefore,
        ];
    }
}


1			<?php
2
3			namespace Siak\Tontine\Service\Meeting\Credit;
4
5			use Closure;
6			use Illuminate\Support\Collection;
7			use Siak\Tontine\Model\Debt;
8			use Siak\Tontine\Model\PartialRefund;
9			use Siak\Tontine\Model\Refund;
10			use Siak\Tontine\Model\Session;
11
12			use function pow;
13
14			class DebtCalculator
15			{
16			/**
17			* Count the sessions.
18			*
19			* @param Debt $debt
20			* @param Session $fromSession The session to start from
21			* @param Session $toSession The session to end to
22			*
23			* @return int
24			*/
25			private function getSessionCount(Debt $debt, Session $fromSession, Session $toSession): int
26			{
27			return $debt->loan->fund->sessions
28			->filter(fn($session) => $session->day_date <= $toSession->day_date &&
29			$session->day_date > $fromSession->day_date)
30			->count();
31			}
32
33			/**
34			* Get the last session for interest calculation
35			*
36			* @param Debt $debt
37			* @param Session $currentSession
38			*
39			* @return Session
40			*/
41			private function getLastSession(Debt $debt, Session $currentSession): Session
42			{
43			return $debt->refund &&
44			$debt->refund->session->day_date < $currentSession->day_date ?
45			$debt->refund->session : $currentSession;
46			}
47
48			/**
49			* @param Session $current
50			* @param bool $withCurrent Also take the refunds in the current session.
51			*
52			* @return Closure
53			*/
54			private function getRefundFilter(Session $current, bool $withCurrent): Closure
55			{
56			return !$withCurrent ?
57			fn(PartialRefund\|Refund $refund) => $refund->session->day_date < $current->day_date :
58			fn(PartialRefund\|Refund $refund) => $refund->session->day_date <= $current->day_date;
59			}
60
61			/**
62			* @param Debt $debt
63			* @param Session $current
64			* @param bool $withCurrent Also take the refunds in the current session.
65			*
66			* @return Collection
67			*/
68			private function getPartialRefunds(Debt $debt, Session $current, bool $withCurrent): Collection
69			{
70			return $debt->partial_refunds->filter($this->getRefundFilter($current, $withCurrent));
71			}
72
73			/**
74			* @param Debt $debt
75			* @param Session $current
76			*
77			* @return Session
78			*/
79			private function getLastSessionForInterest(Debt $debt, Session $current): Session
80			{
81			$endSession = $debt->loan->fund->interest;
82			return $current->day_date < $endSession->day_date ? $current : $endSession;
83			}
84
85			/**
86			* Get the simple interest amount.
87			*
88			* @param Debt $debt
89			* @param Session $session
90			*
91			* @return int
92			*/
93			private function getSimpleInterestAmount(Debt $debt, Session $session): int
94			{
95			$principalDebt = $debt->loan->principal_debt;
96			$loanAmount = $principalDebt->amount;
97			// The interest rate is multiplied by 100 in the database.
98			$interestRate = $debt->loan->interest_rate / 10000;
99			$interestAmount = 0;
100
101			$startSession = $debt->loan->session;
102			$endSession = $this->getLastSessionForInterest($debt, $session);
103
104			// Take refunds before the end session and sort by session date.
105			$partialRefunds = $this->getPartialRefunds($principalDebt, $endSession, false)
106			->sortBy('session.day_date');
107			foreach($partialRefunds as $refund)
108			{
109			$sessionCount = $this->getSessionCount($debt, $startSession, $refund->session);
110			$interestAmount += (int)($loanAmount * $interestRate * $sessionCount);
111			// For the next loop
112			$loanAmount -= $refund->amount;
113			$startSession = $refund->session;
114			}
115
116			$lastSession = $this->getLastSession($principalDebt, $endSession);
117			$sessionCount = $this->getSessionCount($debt, $startSession, $lastSession);
118
119			return $interestAmount + (int)($loanAmount * $interestRate * $sessionCount);
120			}
121
122			/**
123			* Get the compound interest amount.
124			*
125			* @param Debt $debt
126			* @param Session $session
127			*
128			* @return int
129			*/
130			private function getCompoundInterestAmount(Debt $debt, Session $session): int
131			{
132			$principalDebt = $debt->loan->principal_debt;
133			$loanAmount = $principalDebt->amount;
134			// The interest rate is multiplied by 100 in the database.
135			$interestRate = $debt->loan->interest_rate / 10000;
136			$interestAmount = 0;
137
138			$startSession = $debt->loan->session;
139			$endSession = $this->getLastSessionForInterest($debt, $session);
140
141			// Take refunds before the current session and sort by session date.
142			$partialRefunds = $this->getPartialRefunds($principalDebt, $endSession, false)
143			->sortBy('session.day_date');
144			foreach($partialRefunds as $refund)
145			{
146			$sessionCount = $this->getSessionCount($debt, $startSession, $refund->session);
147			$interestAmount += (int)($loanAmount * (pow(1 + $interestRate, $sessionCount) - 1));
148			// For the next loop
149			$loanAmount -= $refund->amount - $interestAmount;
150			$startSession = $refund->session;
151			}
152
153			$lastSession = $this->getLastSession($principalDebt, $endSession);
154			$sessionCount = $this->getSessionCount($debt, $startSession, $lastSession);
155
156			return $interestAmount + (int)($loanAmount * (pow(1 + $interestRate, $sessionCount) - 1));
157			}
158
159			/**
160			* @param Debt $debt
161			*
162			* @return bool
163			*/
164			private function debtAmountIsFixed(Debt $debt): bool
165			{
166			// The amount in a debt model is fixed if it is a principal debt,
167			// or it is an interest debt with fixed amount or unique interest rate.
168			return $debt->is_principal \|\| !$debt->loan->recurrent_interest;
			0 ignored issues – show Bug introduced 2025-03-14 12:03 UTC by Report Bug Copy Issue Report The property `recurrent_interest` does not exist on `Siak\Tontine\Model\Loan`. Did you mean `interest`? Loading history... Bug introduced 2025-03-19 12:47 UTC by Report Bug Copy Issue Report The property `is_principal` does not seem to exist on `Siak\Tontine\Model\Debt`. Are you sure there is no database migration missing? Checks if undeclared accessed properties appear in database migrations and if the creating migration is correct. Loading history...
169			}
170
171			/**
172			* Get the amount of a given debt.
173			*
174			* @param Debt $debt
175			* @param Session $session
176			*
177			* @return int
178			*/
179			public function getDebtAmount(Debt $debt, Session $session): int
180			{
181			return $this->debtAmountIsFixed($debt) ? $debt->amount :
182			($debt->loan->simple_interest ?
183			$this->getSimpleInterestAmount($debt, $session) :
184			$this->getCompoundInterestAmount($debt, $session));
185			}
186
187			/**
188			* Get the paid amount for a given debt at a given session.
189			*
190			* @param Debt $debt
191			* @param Session $session
192			* @param bool $withCurrent Take the current session into account.
193			*
194			* @return int
195			*/
196			public function getDebtPaidAmount(Debt $debt, Session $session, bool $withCurrent): int
197			{
198			$refundFilter = $this->getRefundFilter($session, $withCurrent);
199			return ($debt->refund !== null && $refundFilter($debt->refund)) ? $debt->amount :
200			$this->getPartialRefunds($debt, $session, $withCurrent)->sum('amount');
201			}
202
203			/**
204			* Get the amount due of a given debt before the given session.
205			*
206			* @param Debt $debt
207			* @param Session $session
208			* @param bool $withCurrent Take the current session into account.
209			*
210			* @return int
211			*/
212			public function getDebtDueAmount(Debt $debt, Session $session, bool $withCurrent): int
213			{
214			$refundFilter = $this->getRefundFilter($session, $withCurrent);
215			if($debt->refund !== null && $refundFilter($debt->refund))
216			{
217			return 0; // The debt was refunded before the current session.
218			}
219
220			return $this->getDebtAmount($debt, $session) -
221			$this->getPartialRefunds($debt, $session, $withCurrent)->sum('amount');
222			}
223
224			/**
225			* Get the max amount that can be paid for a given debt at a given session.
226			*
227			* @param Debt $debt
228			* @param Session $session
229			*
230			* @return int
231			*/
232			public function getDebtPayableAmount(Debt $debt, Session $session): int
233			{
234			return $this->getDebtDueAmount($debt, $session, false);
235			}
236
237			/**
238			* Get the total refunded amount.
239			*
240			* @param Debt $debt
241			*
242			* @return int
243			*/
244			public function getDebtTotalPaidAmount(Debt $debt): int
245			{
246			return $debt->refund !== null ? $debt->amount : $debt->partial_refunds->sum('amount');
247			}
248
249			/**
250			* Get the amount due after the current session
251			*
252			* @param Debt $debt
253			* @param Session $session
254			* @param int $dueBefore
255			*
256			* @return int
257			*/
258			private function getAmountDueAfter(Debt $debt, Session $session, int $dueBefore): int
259			{
260			$refundFilter = $this->getRefundFilter($session, true);
261			if($debt->refund !== null && $refundFilter($debt->refund))
262			{
263			return 0; // The debt was refunded before the current session.
264			}
265
266			return $dueBefore - ($debt->partial_refund?->amount ?? 0);
267			}
268
269			/**
270			* @param Debt $debt
271			* @param Session $session
272			*
273			* @return array
274			*/
275			public function getAmounts(Debt $debt, Session $session): array
276			{
277			// The total debt amount.
278			$debtAmount = $this->getDebtAmount($debt, $session);
279			// The total paid amount.
280			$totalPaidAmount = $this->getDebtTotalPaidAmount($debt);
281			// The amount paid before the session.
282			$paidAmount = $this->getDebtPaidAmount($debt, $session, false);
283			// The amount due before the session;
284			$amountDueBefore = $debtAmount - $paidAmount;
285			// The amount due after the session;
286			$amountDueAfter = $this->getAmountDueAfter($debt, $session, $amountDueBefore);
287
288			return [
289			'debt' => $debt,
290			'session' => $session,
291			'debtAmount' => $debtAmount,
292			'totalPaidAmount' => $totalPaidAmount,
293			'paidAmount' => $paidAmount,
294			'amountDueBeforeSession' => $amountDueBefore,
295			'amountDueAfterSession' => $amountDueAfter,
296			'payableAmount' => $amountDueBefore,
297			];
298			}
299			}
300

lagdo / tontine

DebtCalculator::getSimpleInterestAmount() A last analyzed 2025-11-03 02:04 UTC

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DebtCalculator::getSimpleInterestAmount() A
last analyzed 2025-11-03 02:04 UTC