restructure retribution calculations table
This commit is contained in:
arifal hidayat
243
app/Services/RetributionCalculatorService.php
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243
app/Services/RetributionCalculatorService.php
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<?php
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namespace App\Services;
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use App\Models\BuildingType;
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use App\Models\HeightIndex;
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use App\Models\RetributionConfig;
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use App\Models\RetributionCalculation;
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class RetributionCalculatorService
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{
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/**
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* Calculate retribution for given parameters
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*/
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public function calculate(
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int $buildingTypeId,
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int $floorNumber,
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float $buildingArea,
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bool $saveResult = true
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): array {
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// Get building type with indices
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$buildingType = BuildingType::with('indices')->findOrFail($buildingTypeId);
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// Check if building type is free
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if ($buildingType->isFree()) {
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return $this->createFreeResult($buildingType, $floorNumber, $buildingArea, $saveResult);
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}
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// Get height index
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$heightIndex = HeightIndex::getHeightIndexByFloor($floorNumber);
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// Get configuration values
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$baseValue = RetributionConfig::getValue('BASE_VALUE', 70350);
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$infrastructureMultiplier = RetributionConfig::getValue('INFRASTRUCTURE_MULTIPLIER', 0.5);
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$heightMultiplier = RetributionConfig::getValue('HEIGHT_MULTIPLIER', 0.5);
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// Get indices
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$indices = $buildingType->indices;
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if (!$indices) {
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throw new \Exception("Indices not found for building type: {$buildingType->name}");
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}
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// Calculate using Excel formula
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$result = $this->executeCalculation(
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$buildingType,
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$indices,
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$heightIndex,
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$baseValue,
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$infrastructureMultiplier,
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$heightMultiplier,
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$floorNumber,
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$buildingArea
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);
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// Save result if requested
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if ($saveResult) {
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$calculation = RetributionCalculation::createCalculation(
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$buildingTypeId,
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$floorNumber,
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$buildingArea,
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$result['total_retribution'],
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$result['calculation_detail']
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);
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$result['calculation_id'] = $calculation->calculation_id;
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}
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return $result;
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}
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/**
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* Execute the main calculation logic
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*/
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protected function executeCalculation(
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BuildingType $buildingType,
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$indices,
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float $heightIndex,
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float $baseValue,
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float $infrastructureMultiplier,
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float $heightMultiplier,
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int $floorNumber,
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float $buildingArea
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): array {
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// Step 1: Calculate H5 coefficient (Excel formula: RUNDOWN(($E5*($F5+$G5+(0.5*H$3))),4))
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// H5 = coefficient * (ip_permanent + ip_complexity + (height_multiplier * height_index))
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$h5Raw = $indices->coefficient * (
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$indices->ip_permanent +
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$indices->ip_complexity +
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($heightMultiplier * $heightIndex)
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);
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// Apply RUNDOWN (floor to 4 decimal places)
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$h5 = floor($h5Raw * 10000) / 10000;
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// Step 2: Main calculation (Excel: 1*D5*(N5*base_value*H5*1))
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// Main = building_area * locality_index * base_value * h5
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$mainCalculation = $buildingArea * $indices->locality_index * $baseValue * $h5;
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// Step 3: Infrastructure calculation (Excel: O3*(1*D5*(N5*base_value*H5*1)))
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// Additional = infrastructure_multiplier * main_calculation
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$infrastructureCalculation = $infrastructureMultiplier * $mainCalculation;
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// Step 4: Total retribution (Main + Infrastructure)
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$totalRetribution = $mainCalculation + $infrastructureCalculation;
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return [
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'building_type' => [
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'id' => $buildingType->id,
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'code' => $buildingType->code,
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'name' => $buildingType->name,
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'is_free' => $buildingType->is_free
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],
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'input_parameters' => [
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'building_area' => $buildingArea,
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'floor_number' => $floorNumber,
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'height_index' => $heightIndex,
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'base_value' => $baseValue,
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'infrastructure_multiplier' => $infrastructureMultiplier,
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'height_multiplier' => $heightMultiplier
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],
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'indices' => [
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'coefficient' => $indices->coefficient,
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'ip_permanent' => $indices->ip_permanent,
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'ip_complexity' => $indices->ip_complexity,
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'locality_index' => $indices->locality_index,
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'infrastructure_factor' => $indices->infrastructure_factor
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],
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'calculation_steps' => [
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'h5_coefficient' => [
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'formula' => 'RUNDOWN((coefficient * (ip_permanent + ip_complexity + (height_multiplier * height_index))), 4)',
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'calculation' => "RUNDOWN(({$indices->coefficient} * ({$indices->ip_permanent} + {$indices->ip_complexity} + ({$heightMultiplier} * {$heightIndex}))), 4)",
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'raw_result' => $h5Raw,
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'result' => $h5
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],
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'main_calculation' => [
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'formula' => 'building_area * locality_index * base_value * h5',
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'calculation' => "{$buildingArea} * {$indices->locality_index} * {$baseValue} * {$h5}",
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'result' => $mainCalculation
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],
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'infrastructure_calculation' => [
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'formula' => 'infrastructure_multiplier * main_calculation',
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'calculation' => "{$infrastructureMultiplier} * {$mainCalculation}",
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'result' => $infrastructureCalculation
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],
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'total_calculation' => [
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'formula' => 'main_calculation + infrastructure_calculation',
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'calculation' => "{$mainCalculation} + {$infrastructureCalculation}",
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'result' => $totalRetribution
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]
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],
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'total_retribution' => $totalRetribution,
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'formatted_amount' => 'Rp ' . number_format($totalRetribution, 2, ',', '.'),
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'calculation_detail' => [
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'h5_raw' => $h5Raw,
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'h5' => $h5,
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'main' => $mainCalculation,
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'infrastructure' => $infrastructureCalculation,
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'total' => $totalRetribution
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]
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];
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}
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/**
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* Create result for free building types
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*/
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protected function createFreeResult(
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BuildingType $buildingType,
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int $floorNumber,
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float $buildingArea,
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bool $saveResult
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): array {
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$result = [
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'building_type' => [
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'id' => $buildingType->id,
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'code' => $buildingType->code,
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'name' => $buildingType->name,
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'is_free' => true
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],
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'input_parameters' => [
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'building_area' => $buildingArea,
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'floor_number' => $floorNumber
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],
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'total_retribution' => 0.0,
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'formatted_amount' => 'Rp 0 (Gratis)',
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'calculation_detail' => [
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'reason' => 'Building type is free of charge',
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'total' => 0.0
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]
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];
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if ($saveResult) {
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$calculation = RetributionCalculation::createCalculation(
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$buildingType->id,
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$floorNumber,
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$buildingArea,
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0.0,
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$result['calculation_detail']
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);
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$result['calculation_id'] = $calculation->calculation_id;
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}
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return $result;
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}
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/**
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* Get calculation by ID
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*/
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public function getCalculationById(string $calculationId): ?RetributionCalculation
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{
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return RetributionCalculation::with('buildingType')
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->where('calculation_id', $calculationId)
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->first();
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}
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/**
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* Get all available building types for calculation
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*/
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public function getAvailableBuildingTypes(): array
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{
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return BuildingType::with('indices')
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->active()
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->children() // Only child types can be used for calculation
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->get()
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->map(function ($type) {
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return [
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'id' => $type->id,
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'code' => $type->code,
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'name' => $type->name,
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'is_free' => $type->is_free,
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'has_indices' => $type->indices !== null,
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'coefficient' => $type->indices ? $type->indices->coefficient : null
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];
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})
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->toArray();
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}
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/**
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* Get all available floor numbers
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*/
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public function getAvailableFloors(): array
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{
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return HeightIndex::getAvailableFloors();
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}
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}
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