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			297 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			297 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
<?php
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/*
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 * BudgetController.php
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 * Copyright (c) 2023 james@firefly-iii.org
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 *
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 * This file is part of Firefly III (https://github.com/firefly-iii).
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU Affero General Public License as
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 * published by the Free Software Foundation, either version 3 of the
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 * License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU Affero General Public License for more details.
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 *
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 * You should have received a copy of the GNU Affero General Public License
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 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
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 */
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declare(strict_types=1);
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namespace FireflyIII\Api\V2\Controllers\Chart;
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use Carbon\Carbon;
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use FireflyIII\Api\V2\Controllers\Controller;
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use FireflyIII\Api\V2\Request\Generic\DateRequest;
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use FireflyIII\Exceptions\FireflyException;
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use FireflyIII\Models\Budget;
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use FireflyIII\Models\BudgetLimit;
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use FireflyIII\Models\TransactionCurrency;
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use FireflyIII\Repositories\Budget\BudgetLimitRepositoryInterface;
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use FireflyIII\Repositories\UserGroups\Budget\BudgetRepositoryInterface;
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use FireflyIII\Repositories\UserGroups\Budget\OperationsRepositoryInterface;
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use FireflyIII\Support\Http\Api\CleansChartData;
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use FireflyIII\Support\Http\Api\ExchangeRateConverter;
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use FireflyIII\Support\Http\Api\ValidatesUserGroupTrait;
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use Illuminate\Http\JsonResponse;
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use Illuminate\Support\Collection;
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use Illuminate\Support\Facades\Log;
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/**
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 * Class BudgetController
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 */
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class BudgetController extends Controller
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{
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    use CleansChartData;
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    use ValidatesUserGroupTrait;
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    protected OperationsRepositoryInterface $opsRepository;
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    private BudgetLimitRepositoryInterface  $blRepository;
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    private array                           $currencies = [];
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    private TransactionCurrency             $currency;
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    private BudgetRepositoryInterface       $repository;
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    public function __construct()
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    {
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        parent::__construct();
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        $this->middleware(
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            function ($request, $next) {
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                $this->repository    = app(BudgetRepositoryInterface::class);
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                $this->blRepository  = app(BudgetLimitRepositoryInterface::class);
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                $this->opsRepository = app(OperationsRepositoryInterface::class);
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                $this->currency      = app('amount')->getDefaultCurrency();
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                $userGroup           = $this->validateUserGroup($request);
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                if (null !== $userGroup) {
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                    $this->repository->setUserGroup($userGroup);
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                    $this->opsRepository->setUserGroup($userGroup);
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                }
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                return $next($request);
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            }
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        );
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    }
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    /**
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     * TODO see autocomplete/accountcontroller
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     */
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    public function dashboard(DateRequest $request): JsonResponse
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    {
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        $params  = $request->getAll();
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        /** @var Carbon $start */
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        $start   = $params['start'];
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        /** @var Carbon $end */
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        $end     = $params['end'];
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        // code from FrontpageChartGenerator, but not in separate class
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        $budgets = $this->repository->getActiveBudgets();
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        $data    = [];
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        /** @var Budget $budget */
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        foreach ($budgets as $budget) {
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            // could return multiple arrays, so merge.
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            $data = array_merge($data, $this->processBudget($budget, $start, $end));
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        }
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        return response()->json($this->clean($data));
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    }
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    /**
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     * @throws FireflyException
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     */
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    private function processBudget(Budget $budget, Carbon $start, Carbon $end): array
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    {
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        // get all limits:
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        $limits = $this->blRepository->getBudgetLimits($budget, $start, $end);
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        $rows   = [];
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        // if no limits
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        if (0 === $limits->count()) {
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            // return as a single item in an array
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            $rows = $this->noBudgetLimits($budget, $start, $end);
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        }
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        if ($limits->count() > 0) {
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            $rows = $this->budgetLimits($budget, $limits);
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        }
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        // is always an array
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        $return = [];
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        foreach ($rows as $row) {
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            $current  = [
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                'label'                          => $budget->name,
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                'currency_id'                    => (string) $row['currency_id'],
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                'currency_code'                  => $row['currency_code'],
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                'currency_name'                  => $row['currency_name'],
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                'currency_decimal_places'        => $row['currency_decimal_places'],
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                'native_currency_id'             => (string) $row['native_currency_id'],
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                'native_currency_code'           => $row['native_currency_code'],
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                'native_currency_name'           => $row['native_currency_name'],
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                'native_currency_decimal_places' => $row['native_currency_decimal_places'],
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                'period'                         => null,
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                'start'                          => $row['start'],
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                'end'                            => $row['end'],
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                'entries'                        => [
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                    'spent'     => $row['spent'],
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                    'left'      => $row['left'],
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                    'overspent' => $row['overspent'],
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                ],
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                'native_entries'                 => [
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                    'spent'     => $row['native_spent'],
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                    'left'      => $row['native_left'],
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                    'overspent' => $row['native_overspent'],
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                ],
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            ];
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            $return[] = $current;
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        }
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        return $return;
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    }
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    /**
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     * When no budget limits are present, the expenses of the whole period are collected and grouped.
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     * This is grouped per currency. Because there is no limit set, "left to spend" and "overspent" are empty.
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     *
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     * @throws FireflyException
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     */
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    private function noBudgetLimits(Budget $budget, Carbon $start, Carbon $end): array
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    {
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        $spent = $this->opsRepository->listExpenses($start, $end, null, new Collection([$budget]));
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        return $this->processExpenses($budget->id, $spent, $start, $end);
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    }
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    /**
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     * Shared between the "noBudgetLimits" function and "processLimit". Will take a single set of expenses and return
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     * its info.
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     *
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     * @param array<int, array<int, string>> $array
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     *
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     * @throws FireflyException
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     */
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    private function processExpenses(int $budgetId, array $array, Carbon $start, Carbon $end): array
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    {
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        Log::debug(sprintf('Created new ExchangeRateConverter in %s', __METHOD__));
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        $converter = new ExchangeRateConverter();
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        $return    = [];
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        /**
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         * This array contains the expenses in this budget. Grouped per currency.
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         * The grouping is on the main currency only.
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         *
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         * @var int   $currencyId
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         * @var array $block
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         */
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        foreach ($array as $currencyId => $block) {
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            $this->currencies[$currencyId] ??= TransactionCurrency::find($currencyId);
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            $return[$currencyId]           ??= [
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                'currency_id'                    => (string) $currencyId,
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                'currency_code'                  => $block['currency_code'],
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                'currency_name'                  => $block['currency_name'],
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                'currency_symbol'                => $block['currency_symbol'],
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                'currency_decimal_places'        => (int) $block['currency_decimal_places'],
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                'native_currency_id'             => (string) $this->currency->id,
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                'native_currency_code'           => $this->currency->code,
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                'native_currency_name'           => $this->currency->name,
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                'native_currency_symbol'         => $this->currency->symbol,
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                'native_currency_decimal_places' => $this->currency->decimal_places,
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                'start'                          => $start->toAtomString(),
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                'end'                            => $end->toAtomString(),
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                'spent'                          => '0',
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                'native_spent'                   => '0',
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                'left'                           => '0',
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                'native_left'                    => '0',
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                'overspent'                      => '0',
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                'native_overspent'               => '0',
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            ];
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            $currentBudgetArray = $block['budgets'][$budgetId];
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            // var_dump($return);
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            /** @var array $journal */
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            foreach ($currentBudgetArray['transaction_journals'] as $journal) {
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                // convert the amount to the native currency.
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                $rate                                = $converter->getCurrencyRate($this->currencies[$currencyId], $this->currency, $journal['date']);
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                $convertedAmount                     = bcmul($journal['amount'], $rate);
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                if ($journal['foreign_currency_id'] === $this->currency->id) {
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                    $convertedAmount = $journal['foreign_amount'];
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                }
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                $return[$currencyId]['spent']        = bcadd($return[$currencyId]['spent'], $journal['amount']);
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                $return[$currencyId]['native_spent'] = bcadd($return[$currencyId]['native_spent'], $convertedAmount);
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            }
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        }
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        $converter->summarize();
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        return $return;
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    }
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    /**
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     * Function that processes each budget limit (per budget).
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     *
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     * If you have a budget limit in EUR, only transactions in EUR will be considered.
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     * If you have a budget limit in GBP, only transactions in GBP will be considered.
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     *
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     * If you have a budget limit in EUR, and a transaction in GBP, it will not be considered for the EUR budget limit.
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     *
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     * @throws FireflyException
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     */
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    private function budgetLimits(Budget $budget, Collection $limits): array
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    {
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        app('log')->debug(sprintf('Now in budgetLimits(#%d)', $budget->id));
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        $data = [];
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        /** @var BudgetLimit $limit */
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        foreach ($limits as $limit) {
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            $data = array_merge($data, $this->processLimit($budget, $limit));
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        }
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        return $data;
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    }
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    /**
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     * @throws FireflyException
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     */
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    private function processLimit(Budget $budget, BudgetLimit $limit): array
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    {
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        Log::debug(sprintf('Created new ExchangeRateConverter in %s', __METHOD__));
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        $end                  = clone $limit->end_date;
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        $end->endOfDay();
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        $spent                = $this->opsRepository->listExpenses($limit->start_date, $end, null, new Collection([$budget]));
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        $limitCurrencyId      = $limit->transaction_currency_id;
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        $limitCurrency        = $limit->transactionCurrency;
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        $converter            = new ExchangeRateConverter();
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        $filtered             = [];
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        $rate                 = $converter->getCurrencyRate($limitCurrency, $this->currency, $limit->start_date);
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        $convertedLimitAmount = bcmul($limit->amount, $rate);
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        /** @var array $entry */
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        foreach ($spent as $currencyId => $entry) {
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            // only spent the entry where the entry's currency matches the budget limit's currency
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            // so $filtered will only have 1 or 0 entries
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            if ($entry['currency_id'] === $limitCurrencyId) {
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                $filtered[$currencyId] = $entry;
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            }
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        }
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        $result               = $this->processExpenses($budget->id, $filtered, $limit->start_date, $end);
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        if (1 === count($result)) {
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            $compare = bccomp($limit->amount, app('steam')->positive($result[$limitCurrencyId]['spent']));
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            if (1 === $compare) {
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                // convert this amount into the native currency:
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                $result[$limitCurrencyId]['left']        = bcadd($limit->amount, $result[$limitCurrencyId]['spent']);
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                $result[$limitCurrencyId]['native_left'] = bcadd($convertedLimitAmount, $result[$limitCurrencyId]['native_spent']);
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            }
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            if ($compare <= 0) {
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                $result[$limitCurrencyId]['overspent']        = app('steam')->positive(bcadd($limit->amount, $result[$limitCurrencyId]['spent']));
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                $result[$limitCurrencyId]['native_overspent'] = app('steam')->positive(bcadd($convertedLimitAmount, $result[$limitCurrencyId]['native_spent']));
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            }
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        }
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        $converter->summarize();
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        return $result;
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    }
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}
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