Added: Create new refuel record

app/controllers/RefuelController.php

@@ -2,8 +2,84 @@
 
 class RefuelController extends Controller {
     public function create() {
+        if($_SERVER['REQUEST_METHOD'] === 'GET'){
             $vehicle = new Vehicle();
             $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
-        $this->view('refuel/create', ['title' => "New refuel record", 'vehicles' => $vehicles]);
+            $this->view('refuel/create', [
+                'title' => "New refuel record",
+                'vehicles' => $vehicles,
+            ]);
+            return;
+        }
+
+        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+            $vehicle_id = $_POST['vehicle'] ?? '';
+            $fuel_type = $_POST['fuel_type'] ?? '';
+            $liters = $_POST['liters'] ?? '';
+            $price_per_liter = $_POST['price_per_liter'] ?? '';
+            $total_price = $_POST['total_price'] ?? '';
+            $note = $_POST['note'] ?? '';
+
+            $validator = new Validator();
+            $validator->required('vehicle', $vehicle_id);
+            $validator->required('fuel_type', $fuel_type);
+            $validator->required('liters', $liters);
+            $validator->required('price_per_liter', $price_per_liter);
+            $validator->required('total_price', $total_price);
+            $validator->number('liters', $liters);
+            $validator->number('price_per_liter', $price_per_liter);
+            $validator->number('total_price', $total_price);
+
+            if (round($liters * $price_per_liter, 2) != $total_price) {
+                $validator->setErrors(["total_price" => "Price calculation is wrong"]);
+            }
+ 
+            if($note == "") $note = NULL;
+
+            if (!$validator->passes()) {
+                $vehicle = new Vehicle();
+                $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
+                $this->view('refuel/create', [
+                    'error' => 'Please correct the errors below.',
+                    'validationErrors' => $validator->errors() ?: [],
+                    'vehicles' => $vehicles,
+                    'title' => 'New refuel record',
+                ]);
+                return;
+            }
+
+            $record = new Refuel();
+            $result = $record->create([
+                'user_id' => $_SESSION['user']['id'],
+                'vehicle_id' => $vehicle_id,
+                'fuel_type' => $fuel_type,
+                'note' => $note,
+                'liters' => $liters,
+                'price_per_liter' => $price_per_liter,
+                'total_price' => $total_price,
+            ]);
+
+            if ($result === true) {
+                $this->redirect('/');
+            } else {
+                $vehicle = new Vehicle();
+                $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
+                $this->view('refuel/create', [
+                    'title' => 'New refuel record',
+                    'error' => $result,
+                    'validationErrors' => [],
+                    'vehicles' => $vehicles,
+                ]);
+            }
+            return;
+        }
+    }
+
+    public function edit() {
+        // Edit refuel record (to be implemented later)
+    }
+
+    public function delete() {
+        // Delete refuel record (to be implemented later)
     }
 }

app/controllers/VehicleController.php

@@ -22,7 +22,7 @@ class VehicleController extends Controller {
             if($note == "") $note = NULL;
 
             if (!$validator->passes()) {
-                $this->view('vehicle/create', [
+                $this->view('vehicles/create', [
                     'error' => 'Please correct the errors below.',
                     'validationErrors' => $validator->errors() ?: [],
                 ]);

app/models/Refuel.php

@@ -1,5 +1,37 @@
 <?php
 
 class Refuel {
+    private $db;
 
+    public function __construct() {
+        $this->db = Database::getInstance()->getConnection();
+    }
+
+    public function create($data) {
+        try{
+            $stmt = $this->db->prepare("
+                INSERT INTO refueling_records (user_id, vehicle_id, fuel_type, note, liters, price_per_liter, total_price, created_at)
+                VALUES (?, ?, ?, ?, ?, ?, ?, NOW())
+            ");
+
+            $stmt->bind_param(
+                "iissddd",
+                $data['user_id'],
+                $data['vehicle_id'],
+                $data['fuel_type'],
+                $data['note'],
+                $data['liters'],
+                $data['price_per_liter'],
+                $data['total_price'],
+            );
+
+            if ($stmt->execute()) {
+                return true;
+            } else {
+                return "Error: " . $stmt->error;
+            }
+        } catch(mysqli_sql_exception $e) {
+            return $e->getMessage();
+        }
+    }
 }

app/views/layouts/base.php

@@ -6,7 +6,7 @@
     <meta name="author" content="Filip Rojek | http://filiprojek.cz">
     <meta name="email" content="webmaster(@)fofrweb.com">
     <meta name="copyright" content="(c) filiprojek.cz">
-    <title>Fuel Stats | <?= $data['title'] ?></title>
+    <title>Fuel Stats<?= isset($data['title']) ? " | " . $data['title'] : "" ?></title>
     <link rel="stylesheet" href="/css/main.css">
     <link rel="stylesheet" href="/css/global.css">
     <link rel="stylesheet" href="/css/vars.css">
@@ -17,7 +17,7 @@
     <header>
       <div id="hd-left">
         <a href="/"><img src="/img/logo.jpg" alt="home"></a>
-        <label><?= $data['title'] ?></label>
+        <label><?= isset($data['title']) ? $data['title'] : "" ?></label>
       </div>
       <div id="hd-right">
         <?php if (!isset($_SESSION['user'])): ?>

app/views/layouts/noheader.php

@@ -6,7 +6,7 @@
     <meta name="author" content="Filip Rojek | http://filiprojek.cz">
     <meta name="email" content="webmaster(@)fofrweb.com">
     <meta name="copyright" content="(c) filiprojek.cz">
-    <title>Fuel Stats | <?= $data['title'] ?></title>
+    <title>Fuel Stats<?= isset($data['title']) ? " | " . $data['title'] : "" ?></title>
     <link rel="stylesheet" href="/css/main.css">
     <link rel="stylesheet" href="/css/global.css">
     <link rel="stylesheet" href="/css/vars.css">

app/views/refuel/create.php

@@ -16,6 +16,9 @@
             <option value="<?= $vehicle['id'] ?>"><?= $vehicle['name'] . " | " . $vehicle['registration_plate'] ?></option>
         <?php endforeach; ?>
         </select>
+        <?php if (isset($this->get('validationErrors')['vehicle'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['vehicle'] ?></small>
+        <?php endif; ?>
 
         <label for="fuel_type">Fuel type</label>
         <select name="fuel_type" id="fuel_type">
@@ -27,26 +30,73 @@
             <option value="Premium Gasoline 98">Premium Gasoline 98</option>
             <option value="Other">Other</option>
         </select>
+        <?php if (isset($this->get('validationErrors')['fuel_type'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['fuel_type'] ?></small>
+        <?php endif; ?>
 
         <label for="liters">Liters</label>
-        <input type="number" name="liters" id="liters" value="<?= htmlspecialchars($_POST['liters'] ?? '') ?>">
+        <input type="number" name="liters" id="liters" min="0" step=".01" value="<?= htmlspecialchars($_POST['liters'] ?? '0.0') ?>">
+        <?php if (isset($this->get('validationErrors')['liters'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['liters'] ?></small>
+        <?php endif; ?>
 
-        <!-- TODO: name and id -->
+        <label for="price_per_liter">Price per liter</label>
+        <input type="number" name="price_per_liter" id="price_per_liter" min="0" step=".01" value="<?= htmlspecialchars($_POST['price_per_liter'] ?? '0.0') ?>">
+        <?php if (isset($this->get('validationErrors')['price_per_liter'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['price_per_liter'] ?></small>
+        <?php endif; ?>
 
-        <label for="liters">Price per liter</label>
-        <input type="number" name="price_per_liter" id="price_per_liter" value="<?= htmlspecialchars($_POST['liters'] ?? '') ?>">
-
-        <label for="liters">Total price</label>
-        <input type="number" name="liters" id="liters" value="<?= htmlspecialchars($_POST['liters'] ?? '') ?>">
+        <label for="total_price">Total price</label>
+        <input type="number" name="total_price" id="total_price" min="0" step=".01" value="<?= htmlspecialchars($_POST['total_price'] ?? '0.0') ?>">
+        <?php if (isset($this->get('validationErrors')['total_price'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['total_price'] ?></small>
+        <?php endif; ?>
 
         <label for="note">Note</label>
         <input type="text" name="note" id="note" value="<?= htmlspecialchars($_POST['note'] ?? '') ?>">
+        <?php if (isset($this->get('validationErrors')['note'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['note'] ?></small>
+        <?php endif; ?>
 
         <input type="submit" value="Create fuel record">
     </form>
 </section>
 
 <script>
+    const inp_lit = document.querySelector("input#liters") 
+    const inp_ppl = document.querySelector("input#price_per_liter")
+    const inp_tot = document.querySelector("input#total_price")
+
+    const rnd = (num) => Math.round((num + Number.EPSILON) * 100) / 100
+
+    function calculate(){
+        let liters = Number(inp_lit.value)
+        let price_per_liter = Number(inp_ppl.value)
+        let total_price = Number(inp_tot.value)
+
+        if(price_per_liter > 0 && liters > 0) {
+            total_price = rnd(liters * price_per_liter)
+        }
+
+        if(price_per_liter > 0 && total_price > 0) {
+            liters = rnd(total_price / price_per_liter)
+        }
+
+        if(liters > 0 && total_price > 0) {
+            price_per_liter = rnd(total_price / liters)
+        }
+
+        inp_lit.value = liters
+        inp_ppl.value = price_per_liter
+        inp_tot.value = total_price
+    }
+
+    [inp_lit, inp_ppl, inp_tot].forEach(inp => {
+        inp.addEventListener("change", () => {
+            calculate()
+        })
+    })
+
     const vehicles = <?= json_encode($data['vehicles']); ?>;
     const fuel_sel = document.querySelector("#fuel_type")
     const vehic_sel = document.querySelector("#vehicle")
@@ -66,6 +116,4 @@
     vehic_sel.addEventListener("change", () => {
         selectFuel()
     })
-
-    // TODO: function for auto calculation price/price_per_liter/liters
 </script>

core/Database.php

@@ -91,13 +91,16 @@ class Database {
         $refuelingTableQuery = "
             CREATE TABLE IF NOT EXISTS refueling_records (
                 id INT AUTO_INCREMENT PRIMARY KEY,
+                user_id INT NOT NULL,
                 vehicle_id INT NOT NULL,
                 fuel_type ENUM('Diesel', 'Gasoline 95', 'Gasoline 98', 'Premium Diesel', 'Premium Gasoline 95', 'Premium Gasoline 98', 'Other') NOT NULL,
-                liters DECIMAL(10, 2) NOT NULL,
-                price_per_liter DECIMAL(10, 2) NOT NULL,
-                total_price DECIMAL(10, 2) NOT NULL,
+                note VARCHAR(150) NULL,
+                liters DOUBLE(10, 2) NOT NULL,
+                price_per_liter DOUBLE(10, 2) NOT NULL,
+                total_price DOUBLE(10, 2) NOT NULL,
                 created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
-                FOREIGN KEY (vehicle_id) REFERENCES vehicles(id) ON DELETE CASCADE
+                FOREIGN KEY (vehicle_id) REFERENCES vehicles(id) ON DELETE CASCADE,
+                FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
             ) ENGINE=InnoDB;
         ";
 

core/Validator.php

@@ -12,6 +12,15 @@ class Validator {
         }
     }
 
+    /**
+     * Check if a field contains numbers
+     */
+    public function number($field, $value, $message = null) {
+        if(!is_numeric($value)) {
+            $this->errors[$field] = $message ?? "$field must be an number";
+        }
+    }
+
     /**
      * Check if a field meets minimum length
      */
@@ -46,6 +55,10 @@ class Validator {
         return $this->errors;
     }
 
+    public function setErrors($errors) {
+        $this->errors = $errors;
+    }
+
     /**
      * Check if validation passed
      */