Merge pull request 'feature/RVRNEXT-7-calculate-balance-for-community-members' (!37) from feature/RVRNEXT-7-calculate-balance-for-community-members into master

Reviewed-on: #37

app.php

@@ -17,9 +17,9 @@ class Container
     static SokoWeb\Interfaces\Database\IConnection $dbConnection;
     static SokoWeb\Interfaces\Database\IAuditLogger $auditLogger;
     static SokoWeb\Interfaces\PersistentData\IPersistentDataManager $persistentDataManager;
-    static SokoWeb\Interfaces\Routing\IRouteCollection $routeCollection;
-    static SokoWeb\Interfaces\Session\ISessionHandler $sessionHandler;
-    static SokoWeb\Interfaces\Request\IRequest $request;
+    static ?SokoWeb\Interfaces\Routing\IRouteCollection $routeCollection = null;
+    static ?SokoWeb\Interfaces\Session\ISessionHandler $sessionHandler = null;
+    static ?SokoWeb\Interfaces\Request\IRequest $request = null;
 }
 
 Container::$dbConnection = new SokoWeb\Database\Mysql\Connection($_ENV['DB_HOST'], $_ENV['DB_USER'], $_ENV['DB_PASSWORD'], $_ENV['DB_NAME']);

composer.json

@@ -10,7 +10,7 @@
     }
   ],
   "require": {
-    "esoko/soko-web": "0.6",
+    "esoko/soko-web": "0.8",
     "firebase/php-jwt": "^6.4"
   },
   "require-dev": {

composer.lock

@@ -4,15 +4,15 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "7b9e3854a5b7ef69d360c1dfbac75c17",
+    "content-hash": "a89a42e04596ab159fc41abbd9390068",
     "packages": [
         {
             "name": "esoko/soko-web",
-            "version": "0.6",
+            "version": "v0.8",
             "source": {
                 "type": "git",
                 "url": "https://git.esoko.eu/esoko/soko-web.git",
-                "reference": "5e0579463cf0f4203c46e0d4f9c09cd283dbf0b8"
+                "reference": "219b42f995b8e34432da4dde77e53e24b75d78dd"
             },
             "require": {
                 "phpmailer/phpmailer": "^6.8",
@@ -33,7 +33,7 @@
                 "GNU GPL 3.0"
             ],
             "description": "Lightweight web framework",
-            "time": "2023-04-19T21:35:03+00:00"
+            "time": "2023-05-01T17:08:22+00:00"
         },
         {
             "name": "firebase/php-jwt",

database/migrations/data/20230428_1826_community_main_currency.php

@@ -0,0 +1,19 @@
+<?php
+
+use RVR\PersistentData\Model\Community;
+use RVR\PersistentData\Model\Currency;
+use SokoWeb\Database\Query\Select;
+
+$select = new Select(Container::$dbConnection);
+$communities = Container::$persistentDataManager->selectMultipleFromDb($select, Community::class);
+
+foreach ($communities as $community) {
+    $mainCurrency = new Currency();
+    $mainCurrency->setCommunity($community);
+    $mainCurrency->setCode($community->getCurrency());
+    $mainCurrency->setRoundDigits(0);
+    Container::$persistentDataManager->saveToDb($mainCurrency);
+
+    $community->setMainCurrency($mainCurrency);
+    Container::$persistentDataManager->saveToDb($community);
+}

database/migrations/structure/20230428_1826_community_main_currency.sql

@@ -0,0 +1,4 @@
+ALTER TABLE `communities`
+ADD `main_currency_id` int(10) unsigned DEFAULT NULL,
+ADD KEY `main_currency_id` (`main_currency_id`),
+ADD CONSTRAINT `communities_main_currency_id` FOREIGN KEY (`main_currency_id`) REFERENCES `currencies` (`id`);

database/migrations/structure/20230428_2150_transactions.sql

@@ -0,0 +1,19 @@
+CREATE TABLE `transactions` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `community_id` int(10) unsigned NOT NULL,
+  `currency_id` int(10) unsigned NOT NULL,
+  `payer_user_id` int(10) unsigned NOT NULL,
+  `payee_user_id` int(10) unsigned NULL,
+  `description` varchar(255) NOT NULL,
+  `sum` decimal(19,9) NOT NULL,
+  `time` timestamp NOT NULL DEFAULT current_timestamp(),
+  PRIMARY KEY (`id`),
+  KEY `community_id` (`community_id`),
+  KEY `currency_id` (`currency_id`),
+  KEY `payer_user_id` (`payer_user_id`),
+  KEY `payee_user_id` (`payee_user_id`),
+  CONSTRAINT `transactions_community_id` FOREIGN KEY (`community_id`) REFERENCES `communities` (`id`),
+  CONSTRAINT `transactions_currency_id` FOREIGN KEY (`currency_id`) REFERENCES `currencies` (`id`),
+  CONSTRAINT `transactions_payer_user_id` FOREIGN KEY (`payer_user_id`) REFERENCES `users` (`id`),
+  CONSTRAINT `transactions_payee_user_id` FOREIGN KEY (`payee_user_id`) REFERENCES `users` (`id`)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;

public/static/css/rvr.css

@@ -31,6 +31,10 @@ main {
     color: #ffffff;
 }
 
+::placeholder, select > option[value=""], .gray {
+    color: #8e8e8e;
+}
+
 p, h1, h2, h3, input, textarea, select, button, a, table, label {
     font-family: 'Oxygen', sans-serif;
 }
@@ -63,7 +67,7 @@ p, h2, h3 {
     line-height: 150%;
 }
 
-p {
+p, th, td {
     font-weight: 400;
     font-size: 16px;
 }
@@ -100,10 +104,23 @@ hr {
     font-weight: 700;
 }
 
-p.small, span.small {
+p.small, span.small, td.small {
     font-size: 14px;
 }
 
+.red {
+    color: #a80908;
+}
+
+.green {
+    color: #008000;
+}
+
+.mono {
+    font-family: 'Oxygen Mono', mono;
+    font-weight: 400;
+}
+
 .justify {
     text-align: justify;
 }
@@ -150,6 +167,12 @@ a:hover, a:focus {
     text-decoration: underline;
 }
 
+a.block {
+    color: initial;
+    font-weight: initial;
+    text-decoration: initial;
+}
+
 button, a.button {
     cursor: pointer;
     font-size: 16px;
@@ -421,7 +444,6 @@ div.buttonContainer>button {
 }
 
 div.box {
-    width: 576px;
     background-color: #eeeef4;
     border-radius: 3px;
     margin: 10px auto;
@@ -429,6 +451,15 @@ div.box {
     box-sizing: border-box;
 }
 
+div.compactBox {
+    width: 576px;
+}
+
+div.transaction {
+    display: grid;
+    grid-template-columns: auto auto;
+}
+
 div.gridContainer {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
@@ -451,7 +482,7 @@ table.fullWidth {
 }
 
 table th {
-    font-weight: bold;
+    font-weight: 700;
 }
 
 table th, table td {
@@ -467,6 +498,34 @@ table th:not(:last-child), table td:not(:last-child) {
     padding-right: 3px;
 }
 
+p.paginateContainer {
+    font-size: 0;
+}
+
+p.paginateContainer > * {
+    font-size: initial;
+    background-color: #5e77aa;
+    border: solid #5e77aa 1px;
+    color: #ffffff;
+    font-weight: 700;
+    padding: 3px 6px;
+    text-align: center;
+    display: inline-block;
+    height: 25px;
+    line-height: 25px;
+    width: 25px;
+}
+
+p.paginateContainer > a:hover, p.paginateContainer > .selected {
+    background-color: #3b5998;
+    border: solid #29457f 1px;
+    text-decoration: none;
+}
+
+p.paginateContainer > *:not(:last-child) {
+    border-right: solid #869ab9 1px;
+}
+
 .choices__inner {
     box-sizing: border-box;
 }
@@ -501,7 +560,7 @@ table th:not(:last-child), table td:not(:last-child) {
         padding-left: 15px;
         padding-right: 15px;
     }
-    div.box {
+    div.compactBox {
         width: initial;
     }
 }

src/Controller/CommunityController.php

@@ -1,6 +1,7 @@
 <?php namespace RVR\Controller;
 
 use DateTime;
+use RVR\Finance\BalanceCalculator;
 use RVR\PersistentData\Model\Community;
 use RVR\PersistentData\Model\CommunityMember;
 use RVR\PersistentData\Model\Currency;
@@ -48,11 +49,36 @@ class CommunityController implements IAuthenticationRequired
             return null;
         }
 
+        \Container::$persistentDataManager->loadRelationsFromDb($community, false, ['main_currency']);
+
+        $balanceCalculator = new BalanceCalculator($community);
+        $debts = $balanceCalculator->calculate();
+        $debtUsers = [];
+        $debtBalance = 0.0;
+        $outstandingUsers = [];
+        $outstandingBalance = 0.0;
+        foreach ($debts as $debt) {
+            if ($debt['payer']->getId() === \Container::$request->user()->getUniqueId()) {
+                $debtBalance += $debt['amount'];
+                $debtUsers[] = $debt;
+            }
+            if ($debt['payee']->getId() === \Container::$request->user()->getUniqueId()) {
+                $outstandingBalance += $debt['amount'];
+                $outstandingUsers[] = $debt;
+            }
+        }
+        $balance = $outstandingBalance - $debtBalance;
+
         return new HtmlContent('communities/community', [
             'community' => $community,
             'members' => $this->getMembers($community),
             'currencies' => $this->getCurrencies($community),
             'upcomingEvents' => [],
+            'debtUsers' => $debtUsers,
+            'debtBalance' => $debtBalance,
+            'outstandingUsers' => $outstandingUsers,
+            'outstandingBalance' => $outstandingBalance,
+            'balance' => $balance,
             'editPermission' => $ownCommunityMember->getOwner()
         ]);
     }
@@ -73,6 +99,63 @@ class CommunityController implements IAuthenticationRequired
         ]);
     }
 
+    public function saveCommunity(): ?IContent
+    {
+        $name = \Container::$request->post('name');
+        if (strlen($name) === 0) {
+            return new JsonContent([
+                'error' => ['errorText' => 'Please fill all required fields!']
+            ]);
+        }
+
+        $communityId = \Container::$request->query('communityId');
+        if ($communityId){
+            if (!$this->checkPermission($communityId, true, $community, $ownCommunityMember)) {
+                return null;
+            }
+        } else {
+            $mainCurrencyCode = \Container::$request->post('main_currency_code');
+            $mainCurrencyRoundDigits = \Container::$request->post('main_currency_round_digits');
+            if (strlen($mainCurrencyCode) === 0 || strlen($mainCurrencyCode) > 3 || $mainCurrencyRoundDigits < 0 || $mainCurrencyRoundDigits > 9) {
+                return new JsonContent([
+                    'error' => ['errorText' => 'Please fill all required fields!']
+                ]);
+            }
+
+            $community = new Community();
+            $community->setCreatedDate(new DateTime());
+        }
+
+        $community->setName($name);
+        \Container::$persistentDataManager->saveToDb($community);
+
+        if (!$communityId) {
+            /**
+            * @var User $user
+            */
+            $user = \Container::$request->user();
+
+            $communityMember = new CommunityMember();
+            $communityMember->setCommunity($community);
+            $communityMember->setUser($user);
+            $communityMember->setOwner(true);
+            \Container::$persistentDataManager->saveToDb($communityMember);
+
+            $mainCurrency = new Currency();
+            $mainCurrency->setCommunity($community);
+            $mainCurrency->setCode($mainCurrencyCode);
+            $mainCurrency->setRoundDigits($mainCurrencyRoundDigits);
+            \Container::$persistentDataManager->saveToDb($mainCurrency);
+
+            $community->setMainCurrency($mainCurrency);
+            \Container::$persistentDataManager->saveToDb($community);
+        }
+
+        return new JsonContent([
+            'redirect' => ['target' => \Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()])]
+        ]);
+    }
+
     public function getMembersEdit(): ?IContent
     {
         if (!$this->checkPermission(\Container::$request->query('communityId'), true, $community, $ownCommunityMember)) {
@@ -185,6 +268,10 @@ class CommunityController implements IAuthenticationRequired
         }
 
         $currency = $this->currencyRepository->getById(\Container::$request->query('currency_id'));
+        if ($currency->getId() === $community->getMainCurrencyId()) {
+            return null;
+        }
+
         \Container::$persistentDataManager->deleteFromDb($currency);
 
         return new JsonContent(['success' => true]);
@@ -197,7 +284,7 @@ class CommunityController implements IAuthenticationRequired
         }
 
         $currency = $this->currencyRepository->getByCommunityAndCurrencyCode($community, \Container::$request->query('code'));
-        if ($currency === null) {
+        if ($currency === null || $currency->getId() === $community->getMainCurrencyId()) {
             return null;
         }
 
@@ -261,51 +348,9 @@ class CommunityController implements IAuthenticationRequired
         return new JsonContent(['success' => true]);
     }
 
-    public function saveCommunity(): ?IContent
-    {
-        $name = \Container::$request->post('name');
-        $currency = \Container::$request->post('currency');
-        if (strlen($name) === 0 || strlen($currency) === 0 || strlen($currency) > 3) {
-            return new JsonContent([
-                'error' => ['errorText' => 'Please fill all required fields!']
-            ]);
-        }
-
-        $communityId = \Container::$request->query('communityId');
-        if ($communityId){
-            if (!$this->checkPermission($communityId, true, $community, $ownCommunityMember)) {
-                return null;
-            }
-        } else {
-            $community = new Community();
-            $community->setCreatedDate(new DateTime());
-        }
-
-        $community->setName($name);
-        $community->setCurrency($currency);
-        \Container::$persistentDataManager->saveToDb($community);
-
-        if (!$communityId) {
-            /**
-            * @var User $user
-            */
-            $user = \Container::$request->user();
-
-            $communityMember = new CommunityMember();
-            $communityMember->setCommunity($community);
-            $communityMember->setUser($user);
-            $communityMember->setOwner(true);
-            \Container::$persistentDataManager->saveToDb($communityMember);
-        }
-
-        return new JsonContent([
-            'redirect' => ['target' => \Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()])]
-        ]);
-    }
-
     private function getMembers(Community $community): array
     {
-        $members = iterator_to_array($this->communityMemberRepository->getAllByCommunity($community, true));
+        $members = iterator_to_array($this->communityMemberRepository->getAllByCommunity($community, true, ['user']));
         usort($members, function($a, $b) {
             return strnatcmp($a->getUser()->getDisplayName(), $b->getUser()->getDisplayName());
         });
@@ -318,6 +363,9 @@ class CommunityController implements IAuthenticationRequired
         usort($currencies, function($a, $b) {
             return strnatcmp($a->getCode(), $b->getCode());
         });
+        usort($currencies, function($a, $b) use ($community) {
+            return (int)($b->getId() === $community->getMainCurrencyId()) - (int)($a->getId() === $community->getMainCurrencyId());
+        });
         return $currencies;
     }
 

src/Controller/HomeController.php

@@ -1,5 +1,6 @@
 <?php namespace RVR\Controller;
 
+use RVR\PersistentData\Model\Community;
 use RVR\PersistentData\Model\User;
 use RVR\Repository\CommunityMemberRepository;
 use SokoWeb\Interfaces\Authentication\IAuthenticationRequired;
@@ -27,7 +28,7 @@ class HomeController implements IAuthenticationRequired
         */
         $user = \Container::$request->user();
 
-        $ownCommunityMembers = $this->communityMemberRepository->getAllByUser($user, true);
+        $ownCommunityMembers = $this->communityMemberRepository->getAllByUser($user, true, ['community']);
         $communities = [];
         foreach ($ownCommunityMembers as $ownCommunityMember) {
             $communities[] = $ownCommunityMember->getCommunity();

src/Controller/TransactionController.php

@@ -0,0 +1,162 @@
+<?php namespace RVR\Controller;
+
+use Container;
+use DateTime;
+use RVR\Finance\ExchangeRateCalculator;
+use RVR\PersistentData\Model\Community;
+use RVR\PersistentData\Model\CommunityMember;
+use RVR\PersistentData\Model\Transaction;
+use RVR\PersistentData\Model\User;
+use RVR\Repository\CommunityMemberRepository;
+use RVR\Repository\CommunityRepository;
+use RVR\Repository\CurrencyRepository;
+use RVR\Repository\TransactionRepository;
+use SokoWeb\Interfaces\Authentication\IAuthenticationRequired;
+use SokoWeb\Interfaces\Authorization\ISecured;
+use SokoWeb\Interfaces\Response\IContent;
+use SokoWeb\Response\HtmlContent;
+use SokoWeb\Response\JsonContent;
+
+class TransactionController implements IAuthenticationRequired, ISecured
+{
+    private CommunityRepository $communityRepository;
+
+    private CommunityMemberRepository $communityMemberRepository;
+
+    private CurrencyRepository $currencyRepository;
+
+    private TransactionRepository $transactionRepository;
+
+    private Community $community;
+
+    private CommunityMember $ownCommunityMember;
+
+    public function __construct()
+    {
+        $this->communityRepository = new CommunityRepository();
+        $this->communityMemberRepository = new CommunityMemberRepository();
+        $this->currencyRepository = new CurrencyRepository();
+        $this->transactionRepository = new TransactionRepository();
+    }
+
+    public function isAuthenticationRequired(): bool
+    {
+        return true;
+    }
+
+    public function authorize(): bool
+    {
+        $communityId = \Container::$request->query('communityId');
+        $this->community = $this->communityRepository->getById($communityId);
+        if ($this->community === null) {
+            return false;
+        }
+
+        /**
+        * @var User $user
+        */
+        $user = \Container::$request->user();
+        $this->ownCommunityMember = $this->communityMemberRepository->getByCommunityAndUser($this->community, $user);
+        if ($this->ownCommunityMember === null) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function getTransactions(): IContent
+    {
+        Container::$persistentDataManager->loadRelationsFromDb($this->community, true, ['main_currency']);
+        $exchangeRateCalculator = new ExchangeRateCalculator($this->community->getMainCurrency());
+
+        $itemsPerPage = 50;
+        $numberOfTransactions = $this->transactionRepository->countAllByCommunity($this->community);
+        $pages = ceil($numberOfTransactions / $itemsPerPage);
+        $currentPage = Container::$request->query('page') ?: 0;
+        $transactions = $this->transactionRepository->getPagedByCommunity(
+            $this->community,
+            $currentPage * $itemsPerPage,
+            $itemsPerPage,
+            true,
+            ['currency', 'payer_user', 'payee_user']
+        );
+
+        return new HtmlContent('communities/transactions', [
+            'community' => $this->community,
+            'exchangeRateCalculator' => $exchangeRateCalculator,
+            'pages' => $pages,
+            'currentPage' => $currentPage,
+            'transactions' => $transactions
+        ]);
+    }
+
+    public function getTransactionEdit(): ?IContent
+    {
+        $transactionId = Container::$request->query('transactionId');
+        if ($transactionId) {
+            $transaction = $this->transactionRepository->getById($transactionId);
+            if ($transaction === null) {
+                return null;
+            }
+        } else {
+            $transaction = null;
+        }
+
+        return new HtmlContent('communities/transaction_edit', [
+            'community' => $this->community,
+            'transaction' => $transaction,
+            'members' => $this->getMembers($this->community),
+            'currencies' => $this->getCurrencies($this->community)
+        ]);
+    }
+
+    public function saveTransaction(): ?IContent
+    {
+        $transactionId = Container::$request->query('transactionId');
+        if ($transactionId) {
+            $transaction = $this->transactionRepository->getById($transactionId);
+        } else {
+            $transaction = new Transaction();
+            $transaction->setCommunity($this->community);
+        }
+
+        $transaction->setCurrencyId(Container::$request->post('currency_id'));
+        $transaction->setPayerUserId(Container::$request->post('payer_user_id'));
+        $transaction->setPayeeUserId(Container::$request->post('payee_user_id') ?: null);
+        $transaction->setDescription(Container::$request->post('description'));
+        $transaction->setSum(Container::$request->post('sum'));
+        $transaction->setTimeDate(new DateTime(Container::$request->post('time')));
+        Container::$persistentDataManager->saveToDb($transaction);
+
+        return new JsonContent(['success' => true]);
+    }
+
+    public function deleteTransaction(): IContent
+    {
+        $transaction = $this->transactionRepository->getById(Container::$request->query('transactionId'));
+        Container::$persistentDataManager->deleteFromDb($transaction);
+
+        return new JsonContent(['success' => true]);
+    }
+
+    private function getMembers(Community $community): array
+    {
+        $members = iterator_to_array($this->communityMemberRepository->getAllByCommunity($community, true, ['user']));
+        usort($members, function($a, $b) {
+            return strnatcmp($a->getUser()->getDisplayName(), $b->getUser()->getDisplayName());
+        });
+        return $members;
+    }
+
+    private function getCurrencies(Community $community): array
+    {
+        $currencies = iterator_to_array($this->currencyRepository->getAllByCommunity($community));
+        usort($currencies, function($a, $b) {
+            return strnatcmp($a->getCode(), $b->getCode());
+        });
+        usort($currencies, function($a, $b) use ($community) {
+            return (int)($b->getId() === $community->getMainCurrencyId()) - (int)($a->getId() === $community->getMainCurrencyId());
+        });
+        return $currencies;
+    }
+}

src/Database/AuditLogger.php

@@ -6,6 +6,9 @@ class AuditLogger extends AuditLoggerBase
 {
     protected function getModifierId()
     {
+        if (\Container::$request === null) {
+            return null;
+        }
         $user = \Container::$request->user();
         if ($user === null) {
             return null;

src/Finance/BalanceCalculator.php

@@ -0,0 +1,90 @@
+<?php namespace RVR\Finance;
+
+use RVR\PersistentData\Model\Community;
+use RVR\Repository\CommunityMemberRepository;
+use RVR\Repository\TransactionRepository;
+
+class BalanceCalculator
+{
+    private Community $community;
+
+    private TransactionRepository $transactionRepository;
+
+    private CommunityMemberRepository $communityMemberRepository;
+
+    private ExchangeRateCalculator $exchangeRateCalculator;
+
+    private array $members;
+
+    private array $payments;
+
+    public function __construct(Community $community)
+    {
+        $this->community = $community;
+        $this->transactionRepository = new TransactionRepository();
+        $this->communityMemberRepository = new CommunityMemberRepository();
+        $this->exchangeRateCalculator = new ExchangeRateCalculator($this->community->getMainCurrency());
+    }
+
+    public function calculate(): array
+    {
+        $this->collectMembers();
+        $this->createPaymentsMatrix();
+        $this->sumTransactions();
+        return $this->calculateActualDebts();
+    }
+
+    private function collectMembers(): void
+    {
+        $this->members = [];
+        foreach ($this->communityMemberRepository->getAllByCommunity($this->community, true, ['user']) as $member) {
+            $this->members[$member->getUserId()] = $member;
+        }
+    }
+
+    private function createPaymentsMatrix(): void
+    {
+        $this->payments = [];
+        foreach ($this->members as $payerUserId => $member) {
+            $this->payments[$payerUserId] = [];
+            foreach ($this->members as $payeeUserId => $member) {
+                $this->payments[$payerUserId][$payeeUserId] = 0;
+            }
+        }
+    }
+
+    private function sumTransactions(): void
+    {
+        $membersCount = count($this->members);
+        $transactions = $this->transactionRepository->getAllByCommunity($this->community, true, ['currency']);
+
+        foreach ($transactions as $transaction) {
+            $sum = $this->exchangeRateCalculator->calculate($transaction->getSum(), $transaction->getCurrency(), $transaction->getTimeDate());
+
+            if ($transaction->getPayeeUserId()) {
+                $this->payments[$transaction->getPayerUserId()][$transaction->getPayeeUserId()] += $sum;
+            } else {
+                foreach ($this->members as $payeeUserId => $member) {
+                    $this->payments[$transaction->getPayerUserId()][$payeeUserId] += $sum / $membersCount;
+                }
+            }
+        }
+    }
+
+    private function calculateActualDebts(): array
+    {
+        $actualDebts = [];
+
+        foreach ($this->payments as $payerUserId => $paymentsOfPayer) {
+            foreach ($paymentsOfPayer as $payeeUserId => $sum) {
+                $actualDebt = $this->payments[$payeeUserId][$payerUserId] - $sum;
+
+                if (round($actualDebt, $this->community->getMainCurrency()->getRoundDigits()) > 0.0) {
+                    $actualDebts[] = ['payer' => $this->members[$payerUserId], 'payee' => $this->members[$payeeUserId], 'amount' => $actualDebt];
+                }
+            }
+        }
+
+        return $actualDebts;
+    }
+}

src/Finance/ExchangeRateCalculator.php

@@ -0,0 +1,52 @@
+<?php namespace RVR\Finance;
+
+use DateTime;
+use RVR\PersistentData\Model\Currency;
+use RVR\PersistentData\Model\CurrencyExchangeRate;
+use RVR\Repository\CurrencyExchangeRateRepository;
+
+class ExchangeRateCalculator
+{
+    private Currency $mainCurrency;
+
+    private CurrencyExchangeRateRepository $currencyExchangeRateRepository;
+
+    private array $exchangeRates = [];
+
+    public function __construct(Currency $mainCurrency)
+    {
+        $this->mainCurrency = $mainCurrency;
+        $this->currencyExchangeRateRepository = new CurrencyExchangeRateRepository();
+    }
+
+    public function calculate(float $sumInCurrency, Currency $currency, DateTime $time): float
+    {
+        if ($currency->getId() === $this->mainCurrency->getId()) {
+            return $sumInCurrency;
+        }
+
+        $currentExchangeRate = $this->getCurrentExchangeRate($currency, $time);
+        if ($currentExchangeRate === null) {
+            return 0.0;
+        }
+
+        return $sumInCurrency * $currentExchangeRate->getExchangeRate();
+    }
+
+    private function getCurrentExchangeRate(Currency $currency, DateTime $time): ?CurrencyExchangeRate
+    {
+        if (!isset($this->exchangeRates[$currency->getId()])) {
+            $this->exchangeRates[$currency->getId()] = iterator_to_array($this->currencyExchangeRateRepository->getAllByCurrency($currency));
+        }
+
+        $currentExchangeRate = null;
+        foreach ($this->exchangeRates[$currency->getId()] as $exchangeRate) {
+            if ($exchangeRate->getValidFrom() > $time) {
+                break;
+            }
+            $currentExchangeRate = $exchangeRate;
+        }
+
+        return $currentExchangeRate;
+    }
+}

src/PersistentData/Model/Community.php

@@ -7,12 +7,18 @@ class Community extends Model
 {
     protected static string $table = 'communities';
 
-    protected static array $fields = ['name', 'currency', 'created'];
+    protected static array $fields = ['name', 'currency', 'main_currency_id', 'created'];
+
+    protected static array $relations = ['main_currency' => Currency::class];
 
     private string $name = '';
 
     private string $currency = '';
 
+    private ?Currency $mainCurrency = null;
+
+    private ?int $mainCurrencyId = null;
+
     private DateTime $created;
 
     public function setName(string $name): void
@@ -25,6 +31,16 @@ class Community extends Model
         $this->currency = $currency;
     }
 
+    public function setMainCurrency(Currency $mainCurrency): void
+    {
+        $this->mainCurrency = $mainCurrency;
+    }
+
+    public function setMainCurrencyId(int $mainCurrencyId): void
+    {
+        $this->mainCurrencyId = $mainCurrencyId;
+    }
+
     public function setCreatedDate(DateTime $created): void
     {
         $this->created = $created;
@@ -45,6 +61,16 @@ class Community extends Model
         return $this->currency;
     }
 
+    public function getMainCurrency(): ?Currency
+    {
+        return $this->mainCurrency;
+    }
+
+    public function getMainCurrencyId(): ?int
+    {
+        return $this->mainCurrencyId;
+    }
+
     public function getCreatedDate(): DateTime
     {
         return $this->created;

src/PersistentData/Model/Transaction.php

@@ -0,0 +1,160 @@
+<?php namespace RVR\PersistentData\Model;
+
+use DateTime;
+use SokoWeb\PersistentData\Model\Model;
+
+class Transaction extends Model
+{
+    protected static string $table = 'transactions';
+
+    protected static array $fields = ['community_id', 'currency_id', 'payer_user_id', 'payee_user_id', 'description', 'sum', 'time'];
+
+    protected static array $relations = [
+        'community' => Community::class,
+        'currency' => Currency::class,
+        'payer_user' => User::class,
+        'payee_user' => User::class
+    ];
+
+    private ?Community $community = null;
+
+    private int $communityId;
+
+    private ?Currency $currency = null;
+
+    private int $currencyId;
+
+    private ?User $payerUser = null;
+
+    private int $payerUserId;
+
+    private ?User $payeeUser = null;
+
+    private ?int $payeeUserId = null;
+
+    private string $description = '';
+
+    private float $sum = 0.0;
+
+    private DateTime $time;
+
+    public function setCommunity(Community $community): void
+    {
+        $this->community = $community;
+    }
+
+    public function setCommunityId(int $communityId): void
+    {
+        $this->communityId = $communityId;
+    }
+
+    public function setCurrency(Currency $currency): void
+    {
+        $this->currency = $currency;
+    }
+
+    public function setCurrencyId(int $currencyId): void
+    {
+        $this->currencyId = $currencyId;
+    }
+
+    public function setPayerUser(User $payerUser): void
+    {
+        $this->payerUser = $payerUser;
+    }
+
+    public function setPayerUserId(int $payerUserId): void
+    {
+        $this->payerUserId = $payerUserId;
+    }
+
+    public function setPayeeUser(?User $payeeUser): void
+    {
+        $this->payeeUser = $payeeUser;
+    }
+
+    public function setPayeeUserId(?int $payeeUserId): void
+    {
+        $this->payeeUserId = $payeeUserId;
+    }
+
+    public function setDescription(string $description): void
+    {
+        $this->description = $description;
+    }
+
+    public function setSum(float $sum): void
+    {
+        $this->sum = $sum;
+    }
+
+    public function setTimeDate(DateTime $time): void
+    {
+        $this->time = $time;
+    }
+
+    public function setTime(string $time): void
+    {
+        $this->time = new DateTime($time);
+    }
+
+    public function getCommunity(): ?Community
+    {
+        return $this->community;
+    }
+
+    public function getCommunityId(): int
+    {
+        return $this->communityId;
+    }
+
+    public function getCurrency(): ?Currency
+    {
+        return $this->currency;
+    }
+
+    public function getCurrencyId(): int
+    {
+        return $this->currencyId;
+    }
+
+    public function getPayerUser(): ?User
+    {
+        return $this->payerUser;
+    }
+
+    public function getPayerUserId(): int
+    {
+        return $this->payerUserId;
+    }
+
+    public function getPayeeUser(): ?User
+    {
+        return $this->payeeUser;
+    }
+
+    public function getPayeeUserId(): ?int
+    {
+        return $this->payeeUserId;
+    }
+
+    public function getDescription(): string
+    {
+        return $this->description;
+    }
+
+    public function getSum(): float
+    {
+        return $this->sum;
+    }
+
+    public function getTimeDate(): DateTime
+    {
+        return $this->time;
+    }
+
+    public function getTime(): string
+    {
+        return $this->time->format('Y-m-d H:i:s');
+    }
+}

src/Repository/CommunityMemberRepository.php

@@ -13,20 +13,20 @@ class CommunityMemberRepository
         return \Container::$persistentDataManager->selectFromDbById($id, CommunityMember::class);
     }
 
-    public function getAllByCommunity(Community $community, bool $useRelations = false): Generator
+    public function getAllByCommunity(Community $community, bool $useRelations = false, array $withRelations = []): Generator
     {
         $select = new Select(\Container::$dbConnection);
         $select->where('community_id', '=', $community->getId());
 
-        yield from \Container::$persistentDataManager->selectMultipleFromDb($select, CommunityMember::class, $useRelations);
+        yield from \Container::$persistentDataManager->selectMultipleFromDb($select, CommunityMember::class, $useRelations, $withRelations);
     }
 
-    public function getAllByUser(User $user, bool $useRelations = false): Generator
+    public function getAllByUser(User $user, bool $useRelations = false, array $withRelations = []): Generator
     {
         $select = new Select(\Container::$dbConnection);
         $select->where('user_id', '=', $user->getId());
 
-        yield from \Container::$persistentDataManager->selectMultipleFromDb($select, CommunityMember::class, $useRelations);
+        yield from \Container::$persistentDataManager->selectMultipleFromDb($select, CommunityMember::class, $useRelations, $withRelations);
     }
 
     public function getByCommunityAndUser(Community $community, User $user) : ?CommunityMember

src/Repository/TransactionRepository.php

@@ -0,0 +1,44 @@
+<?php namespace RVR\Repository;
+
+use Container;
+use Generator;
+use RVR\PersistentData\Model\Community;
+use RVR\PersistentData\Model\Transaction;
+use SokoWeb\Database\Query\Select;
+
+class TransactionRepository
+{
+    public function getById(int $id): ?Transaction
+    {
+        return Container::$persistentDataManager->selectFromDbById($id, Transaction::class);
+    }
+
+    public function getAllByCommunity(Community $community, bool $useRelations = false, array $withRelations = []): Generator
+    {
+        $select = $this->selectAllByCommunity($community);
+
+        yield from Container::$persistentDataManager->selectMultipleFromDb($select, Transaction::class, $useRelations, $withRelations);
+    }
+
+    public function countAllByCommunity(Community $community): int
+    {
+        return $this->selectAllByCommunity($community)->count();
+    }
+
+    public function getPagedByCommunity(Community $community, int $start, int $limit, bool $useRelations = false, array $withRelations = []): Generator
+    {
+        $select = new Select(Container::$dbConnection);
+        $select->where('community_id', '=', $community->getId());
+        $select->orderBy('time', 'DESC');
+        $select->limit($limit, $start);
+
+        yield from Container::$persistentDataManager->selectMultipleFromDb($select, Transaction::class, $useRelations, $withRelations);
+    }
+
+    private function selectAllByCommunity(Community $community)
+    {
+        $select = new Select(Container::$dbConnection, Transaction::getTable());
+        $select->where('community_id', '=', $community->getId());
+        return $select;
+    }
+}

views/account/account.php

@@ -4,7 +4,7 @@
 
 @section(main)
     <h2>Account</h2>
-    <div class="box">
+    <div class="box compactBox">
         <form id="accountForm" action="<?= Container::$routeCollection->getRoute('account-action')->generateLink() ?>" method="post" data-reload-on-success="true" data-observe-inputs="email,username,password_new,password_new_confirm,nickname,phone,id_number">
             <?php if ($user['password'] !== null && $user['google_sub'] !== null): ?>
                 <p class="justify small">Please confirm your identity with your password or with Google to modify your account.</p>

views/account/google_authenticate.php

@@ -5,7 +5,7 @@
 @section(main)
     <h2>Authenticate with Google</h2>
     <?php if (!$success): ?>
-    <div class="box">
+    <div class="box compactBox">
         <p class="error justify">
             <?php if (isset($errorText)): ?>
                 <?= $errorText ?>

views/communities/community.php

@@ -16,14 +16,15 @@
         </div>
         <div>
             <h3 class="marginBottom">Currencies</h3>
-            <p>Main currency: <b><?= $community->getCurrency() ?></b></p>
-            <?php if (count($currencies) > 0): ?>
-                <p>Further currencies: <b>
-                    <?php foreach ($currencies as $currency): ?>
+            <?php foreach ($currencies as $currency): ?>
+                <p>
+                    <?php if ($currency->getId() === $community->getMainCurrencyId()): ?>
+                        <b><?= $currency->getCode() ?></b>
+                    <?php else: ?>
                         <a href="<?= Container::$routeCollection->getRoute('community-currency-exchange-rates')->generateLink(['communityId' => $community->getId(), 'code' => $currency->getCode()]) ?>"><?= $currency->getCode() ?></a>
-                    <?php endforeach; ?>
-                </b></p>
-            <?php endif; ?>
+                    <?php endif; ?>
+                </p>
+            <?php endforeach; ?>
             <?php if ($editPermission): ?>
                 <hr>
                 <p><a href="<?= Container::$routeCollection->getRoute('community-currencies')->generateLink(['communityId' => $community->getId()]) ?>">Edit currencies</a></p>
@@ -40,19 +41,36 @@
             <?php endif; ?>
         </div>
         <div>
+            <?php
+            $mainCurrencyCode = $community->getMainCurrency()->getCode();
+            $mainCurrencyRoundDigits = $community->getMainCurrency()->getRoundDigits();
+            ?>
             <h3 class="marginBottom">Finances</h3>
-            <table class="fullWidth">
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId()]) ?>">Transactions</a>
+            <table class="fullWidth marginTop">
                 <tr>
-                    <td>You owe</td>
-                    <td style="text-align: right; color: red;">0 <?= $community->getCurrency() ?></td>
+                    <td class="bold">You owe</td>
+                    <td class="mono red" style="text-align: right;"><?= number_format($debtBalance, $mainCurrencyRoundDigits) ?> <?= $mainCurrencyCode ?></td>
                 </tr>
+                <?php foreach ($debtUsers as $owe): ?>
+                    <tr>
+                        <td class="small"><?= $owe['payee']->getUser()->getDisplayName() ?></td>
+                        <td class="small mono red" style="text-align: right;"><?= number_format($owe['amount'], $mainCurrencyRoundDigits) ?> <?= $mainCurrencyCode ?></td>
+                    </tr>
+                <?php endforeach; ?>
                 <tr>
-                    <td>You're owed</td>
-                    <td style="text-align: right; color: green;">0 <?= $community->getCurrency() ?></td>
+                    <td class="bold">You're owed</td>
+                    <td class="mono green" style="text-align: right;"><?= number_format($outstandingBalance, $mainCurrencyRoundDigits) ?> <?= $mainCurrencyCode ?></td>
                 </tr>
+                <?php foreach ($outstandingUsers as $owe): ?>
+                    <tr>
+                        <td class="small"><?= $owe['payer']->getUser()->getDisplayName() ?></td>
+                        <td class="small mono green" style="text-align: right;"><?= number_format($owe['amount'], $mainCurrencyRoundDigits) ?> <?= $mainCurrencyCode ?></td>
+                    </tr>
+                <?php endforeach; ?>
                 <tr>
-                    <td>Your balance</td>
-                    <td style="text-align: right;">0 <?= $community->getCurrency() ?></td>
+                    <td class="bold">Your balance</td>
+                    <td class="mono <?= $balance < 0 ? 'red' : ($balance > 0 ? 'green' : '') ?>" style="text-align: right;;"><?= number_format($balance, $mainCurrencyRoundDigits) ?> <?= $mainCurrencyCode ?></td>
                 </tr>
             </table>
         </div>

views/communities/community_currencies.php

@@ -1,8 +1,11 @@
 @extends(templates/layout_normal)
 
 @section(main)
-    <h2><a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> - Edit currencies</h2>
-    <div class="box">
+    <h2>
+        <a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> »
+        Edit currencies
+    </h2>
+    <div class="box compactBox">
         <table class="fullWidth">
             <thead>
                 <tr>
@@ -21,9 +24,11 @@
                     <td>
                         <input type="number" form="editCurrency_<?= $currency->getId() ?>" class="text fullWidth" name="round_digits" value="<?= $currency->getRoundDigits() ?>" min="0" max="9" required>
                     </td>
-                    <td style="text-align: right;">
-                        <button type="submit" form="editCurrency_<?= $currency->getId() ?>" name="submit" class="small marginRight" disabled>Save</button><!--
-                     --><button type="submit" form="deleteCurrency_<?= $currency->getId() ?>" class="small red">Delete</button>
+                    <td style="text-align: right; font-size: 0;">
+                        <button type="submit" form="editCurrency_<?= $currency->getId() ?>" name="submit" class="small" disabled>Save</button>
+                        <?php if ($currency->getId() !== $community->getMainCurrencyId()): ?>
+                            <button type="submit" form="deleteCurrency_<?= $currency->getId() ?>" class="small red marginLeft">Delete</button>
+                        <?php endif; ?>
                     </td>
                 </tr>
             <?php endforeach; ?>

views/communities/community_edit.php

@@ -3,12 +3,13 @@
 @section(main)
     <h2>
         <?php if (isset($community)): ?>
-            <a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> - Edit
+            <a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> »
+            Edit
         <?php else: ?>
             New community
         <?php endif; ?>
     </h2>
-    <div class="box">
+    <div class="box compactBox">
         <?php
         $formAction = isset($community) ?
             Container::$routeCollection->getRoute('community-edit-action')->generateLink(['communityId' => $community->getId()]) :
@@ -16,7 +17,10 @@
         ?>
         <form id="communityForm" action="<?= $formAction ?>" method="post" data-redirect-on-success="true">
             <input type="text" class="text big fullWidth" name="name" placeholder="Name" value="<?= isset($community) ? $community->getName() : '' ?>" required>
-            <input type="text" class="text big fullWidth marginTop" name="currency" value="<?= isset($community) ? $community->getCurrency() : '' ?>" placeholder="Default currency" maxlength="3" required>
+            <?php if (!isset($community)): ?>
+                <input type="text" class="text big fullWidth marginTop" name="main_currency_code" placeholder="Main currency" maxlength="3" required>
+                <input type="number" class="text big fullWidth marginTop" name="main_currency_round_digits" placeholder="Main currency round digits" min="0" max="9" required>
+            <?php endif; ?>
             <p id="communityFormError" class="formError justify marginTop"></p>
             <div class="right marginTop">
                 <button type="submit" name="submit"><?= isset($community) ? 'Save' : 'Create' ?></button>

views/communities/community_members.php

@@ -5,8 +5,11 @@
 @extends(templates/layout_normal)
 
 @section(main)
-    <h2><a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> - Edit members</h2>
-    <div class="box">
+    <h2>
+        <a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> »
+        Edit members
+    </h2>
+    <div class="box compactBox">
         <table class="fullWidth">
             <thead>
                 <tr>

views/communities/currency_exchange_rates.php

@@ -1,8 +1,11 @@
 @extends(templates/layout_normal)
 
 @section(main)
-    <h2><a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> - Exchange rates for <?= $currency->getCode() ?></h2>
-    <div class="box">
+    <h2>
+        <a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> »
+        Exchange rates for <?= $currency->getCode() ?>
+    </h2>
+    <div class="box compactBox">
         <table class="fullWidth">
             <thead>
                 <tr>

views/communities/transaction_edit.php

@@ -0,0 +1,53 @@
+@extends(templates/layout_normal)
+
+@section(main)
+    <h2>
+        <a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> »
+        <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId()]) ?>">Transactions</a> »
+        <?php if (isset($transaction)): ?>
+            Edit transaction
+        <?php else: ?>
+            New transaction
+        <?php endif; ?>
+    </h2>
+    <div class="box compactBox">
+        <?php
+        $formAction = isset($transaction) ?
+            Container::$routeCollection->getRoute('community.transactions.edit-action')->generateLink(['communityId' => $community->getId(), 'transactionId' => $transaction->getId()]) :
+            Container::$routeCollection->getRoute('community.transactions.new-action')->generateLink(['communityId' => $community->getId()]);
+        ?>
+        <form id="transactionForm" action="<?= $formAction ?>" method="post" data-redirect-on-success="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId()]) ?>">
+            <select class="big fullWidth" name="payer_user_id" required>
+                <option value="" hidden>[Payer]</option>
+                <?php foreach ($members as $member): ?>
+                    <option value="<?= $member->getUser()->getId() ?>" <?= isset($transaction) && $transaction->getPayerUserId() === $member->getUser()->getId() ? 'selected' : '' ?>><?= $member->getUser()->getDisplayName() ?></option>
+                <?php endforeach; ?>
+            </select>
+            <select class="big fullWidth marginTop" name="payee_user_id">
+                <option value="">[Payee]</option>
+                <?php foreach ($members as $member): ?>
+                    <option value="<?= $member->getUser()->getId() ?>" <?= isset($transaction) && $transaction->getPayeeUserId() === $member->getUser()->getId() ? 'selected' : '' ?>><?= $member->getUser()->getDisplayName() ?></option>
+                <?php endforeach; ?>
+            </select>
+            <input type="text" class="text big fullWidth marginTop" name="description" placeholder="Description" value="<?= isset($transaction) ? $transaction->getDescription() : '' ?>" required>
+            <input type="number" class="text big fullWidth marginTop" name="sum" placeholder="Sum" value="<?= isset($transaction) ? $transaction->getSum() : '' ?>" min="0" step="0.000000001" required>
+            <select class="big fullWidth marginTop" name="currency_id" required>
+                <option value="" hidden>[Currency]</option>
+                <?php foreach ($currencies as $currency): ?>
+                    <option value="<?= $currency->getId() ?>" <?= isset($transaction) && $transaction->getCurrencyId() === $currency->getId() ? 'selected' : '' ?>><?= $currency->getCode() ?></option>
+                <?php endforeach; ?>
+            </select>
+            <input type="datetime-local" class="text big fullWidth marginTop" name="time" placeholder="Time" value="<?= isset($transaction) ? $transaction->getTimeDate()->format('Y-m-d\TH:i') : (new DateTime())->format('Y-m-d\TH:i') ?>" required>
+            <p class="formError justify marginTop"></p>
+            <div class="right marginTop" style="font-size: 0;">
+                <?php if (isset($transaction)): ?>
+                    <button type="submit" form="deleteTransaction" class="red marginRight">Delete</button>
+                <?php endif; ?>
+                <button type="submit" name="submit"><?= isset($transaction) ? 'Save' : 'Create' ?></button>
+            </div>
+        </form>
+        <?php if (isset($transaction)): ?>
+            <form id="deleteTransaction" action="<?= Container::$routeCollection->getRoute('community.transactions.delete')->generateLink(['communityId' => $community->getId(), 'transactionId' => $transaction->getId()]) ?>" method="post" data-redirect-on-success="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId()]) ?>"></form>
+        <?php endif; ?>
+    </div>
+@endsection

views/communities/transactions.php

@@ -0,0 +1,62 @@
+@extends(templates/layout_normal)
+
+@section(main)
+    <h2>
+        <a href="<?= Container::$routeCollection->getRoute('community')->generateLink(['communityId' => $community->getId()]) ?>"><?= $community->getName() ?></a> »
+        Transactions
+    </h2>
+
+    <p class="marginTop"><a href="<?= Container::$routeCollection->getRoute('community.transactions.new')->generateLink(['communityId' => $community->getId()]) ?>">New transaction</a></p>
+
+    <?php if ($pages > 1): ?>
+        <p class="paginateContainer marginTop">
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => 0]) ?>">«</a>
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => max(0, $currentPage - 1)]) ?>">‹</a>
+            <?php for ($i = 0; $i < $pages; $i++): ?>
+                <?php if ($currentPage == $i): ?>
+                    <span class="selected"><?= $i + 1 ?></span>
+                <?php else: ?>
+                    <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => $i]) ?>"><?= $i + 1 ?></a>
+                <?php endif; ?>
+            <?php endfor; ?>
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => min($pages - 1, $currentPage + 1)]) ?>">›</a>
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => $pages - 1]) ?>">»</a>
+        </p>
+    <?php endif; ?>
+
+    <?php foreach ($transactions as $transaction): ?>
+        <a class="block" href="<?= Container::$routeCollection->getRoute('community.transactions.edit')->generateLink(['communityId' => $community->getId(), 'transactionId' => $transaction->getId()]) ?>">
+        <div class="box transaction">
+            <div>
+                <p style="font-weight: bold;"><?= $transaction->getDescription() ?></p>
+                <p class="small"><?= $transaction->getPayerUser()->getDisplayName() ?> ► <?= $transaction->getPayeeUser() ? $transaction->getPayeeUser()->getDisplayName() : '[common]' ?></p>
+                <p class="small"><?= $transaction->getTimeDate()->format('Y-m-d H:i') ?></p>
+            </div>
+            <div style="text-align: right;">
+                <h3><?= number_format($exchangeRateCalculator->calculate($transaction->getSum(), $transaction->getCurrency(), $transaction->getTimeDate()), $community->getMainCurrency()->getRoundDigits()) ?> <?= $community->getMainCurrency()->getCode() ?></h3>
+                <?php if ($community->getMainCurrencyId() !== $transaction->getCurrencyId()): ?>
+                    <p style="color: #8e8e8e; font-weight: bold;"><?= number_format($transaction->getSum(), $transaction->getCurrency()->getRoundDigits()) ?> <?= $transaction->getCurrency()->getCode() ?></p>
+                <?php endif; ?>
+            </div>
+        </div>
+        </a>
+    <?php endforeach; ?>
+
+    <?php if ($pages > 1): ?>
+        <p class="paginateContainer marginTop">
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => 0]) ?>">«</a>
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => max(0, $currentPage - 1)]) ?>">‹</a>
+            <?php for ($i = 0; $i < $pages; $i++): ?>
+                <?php if ($currentPage == $i): ?>
+                    <span class="selected"><?= $i + 1 ?></span>
+                <?php else: ?>
+                    <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => $i]) ?>"><?= $i + 1 ?></a>
+                <?php endif; ?>
+            <?php endfor; ?>
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => min($pages - 1, $currentPage + 1)]) ?>">›</a>
+            <a href="<?= Container::$routeCollection->getRoute('community.transactions')->generateLink(['communityId' => $community->getId(), 'page' => $pages - 1]) ?>">»</a>
+        </p>
+    <?php endif; ?>
+
+    <p class="marginTop"><a href="<?= Container::$routeCollection->getRoute('community.transactions.new')->generateLink(['communityId' => $community->getId()]) ?>">New transaction</a></p>
+@endsection

views/login/google_login_error.php

@@ -2,7 +2,7 @@
 
 @section(main)
     <h2>Login up with Google</h2>
-    <div class="box">
+    <div class="box compactBox">
         <p class="error justify"><?= $error ?></p>
     </div>
 @endsection

views/login/login.php

@@ -2,7 +2,7 @@
 
 @section(main)
     <h2>Login</h2>
-    <div class="box">
+    <div class="box compactBox">
         <form id="loginForm" action="<?= Container::$routeCollection->getRoute('login-action')->generateLink() ?>" method="post" data-redirect-on-success="<?= $redirectUrl ?>">
             <input type="text" class="text big fullWidth" name="email" placeholder="Email address / Username" required autofocus>
             <input type="password"  class="text big fullWidth marginTop" name="password" placeholder="Password" required minlength="6">

views/login/password_reset_request.php

@@ -4,7 +4,7 @@
 
 @section(main)
     <h2>Request password reset</h2>
-    <div class="box">
+    <div class="box compactBox">
         <form id="passwordResetForm" action="<?= Container::$routeCollection->getRoute('password-requestReset-action')->generateLink() ?>" method="post" data-redirect-on-success="<?= Container::$routeCollection->getRoute('password-requestReset.success')->generateLink() ?>">
             <input type="email" class="text big fullWidth" name="email" placeholder="Email address" value="<?= isset($email) ? $email : '' ?>" required autofocus>
             <?php if (!empty($_ENV['RECAPTCHA_SITEKEY'])): ?>

views/login/password_reset_request_success.php

@@ -2,7 +2,7 @@
 
 @section(main)
     <h2>Request password reset</h2>
-    <div class="box">
+    <div class="box compactBox">
         <p class="justify">Password reset was successfully requested. Please check your email and click on the link to reset your password!</p>
     </div>
 @endsection

views/login/reset_password.php

@@ -2,7 +2,7 @@
 
 @section(main)
     <h2>Reset password</h2>
-    <div class="box">
+    <div class="box compactBox">
         <?php if ($success) : ?>
             <form id="resetPasswordForm" action="<?= Container::$routeCollection->getRoute('password-reset.action')->generateLink(['token' => $token]) ?>"" method="post" data-redirect-on-success="<?= $redirectUrl ?>">
                 <input type="email" class="text big fullWidth" name="email" placeholder="Email address" value="<?= $email ?>" disabled>

views/oauth/oauth_error.php

@@ -2,7 +2,7 @@
 
 @section(main)
     <h2>OAuth error</h2>
-    <div class="box">
+    <div class="box compactBox">
         <p class="error justify"><?= $error ?></p>
     </div>
 @endsection

views/templates/rvr.php

@@ -9,13 +9,14 @@
     <?php if (preg_match('/^(http(s)?:)?\/\//', $_ENV['STATIC_ROOT']) === 1): ?>
         <link href="<?= $_ENV['STATIC_ROOT'] ?>" rel="preconnect">
     <?php endif; ?>
-    <link href="https://fonts.gstatic.com" rel="preconnect">
+    <link href="https://fonts.googleapis.com" rel="preconnect">
+    <link href="https://fonts.gstatic.com" rel="preconnect" crossorigin>
     <?php if (!empty($_ENV['GOOGLE_ANALITICS_ID'])): ?>
         <link href="https://www.googletagmanager.com" rel="preconnect">
         <link href="https://www.google-analytics.com" rel="preconnect">
     <?php endif; ?>
-    <link href="https://fonts.googleapis.com/css2?family=Oxygen:wght@400;700&amp;display=swap" rel="stylesheet">
-    <link href="https://fonts.googleapis.com/css2?family=Oxygen+Mono:wght@400&amp;display=swap" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css2?family=Oxygen:wght@400;700&amp;display=block" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css2?family=Oxygen+Mono:wght@400&amp;display=block" rel="stylesheet">
     <link href="<?= $_ENV['STATIC_ROOT'] ?>/css/rvr.css?rev=<?= REVISION ?>" rel="stylesheet">
     @yields('externalCss')
     @yields('inlineCss')

web.php

@@ -11,6 +11,7 @@ use RVR\Controller\OAuthController;
 use RVR\Controller\UserController;
 use RVR\Controller\UserSearchController;
 use RVR\Controller\CommunityController;
+use RVR\Controller\TransactionController;
 use RVR\Repository\UserRepository;
 
 require 'app.php';
@@ -76,6 +77,14 @@ Container::$routeCollection->group('communities', function (RouteCollection $rou
             $routeCollection->post('community-currency-exchange-rates-edit', '{code}/edit', [CommunityController::class, 'saveCurrencyExchangeRate']);
             $routeCollection->post('community-currency-exchange-rates-delete', '{code}/delete', [CommunityController::class, 'deleteCurrencyExchangeRate']);
         });
+        $routeCollection->group('transactions', function (RouteCollection $routeCollection) {
+            $routeCollection->get('community.transactions', '', [TransactionController::class, 'getTransactions']);
+            $routeCollection->get('community.transactions.new', 'new', [TransactionController::class, 'getTransactionEdit']);
+            $routeCollection->post('community.transactions.new-action', 'new', [TransactionController::class, 'saveTransaction']);
+            $routeCollection->get('community.transactions.edit', '{transactionId}', [TransactionController::class, 'getTransactionEdit']);
+            $routeCollection->post('community.transactions.edit-action', '{transactionId}', [TransactionController::class, 'saveTransaction']);
+            $routeCollection->post('community.transactions.delete', '{transactionId}/delete', [TransactionController::class, 'deleteTransaction']);
+        });
     });
 });