Updated: Improved vehicle and refuel data handling on dashboard

Updated:
- DashboardController now fetches latest refuel record only for the default vehicle
- VehicleController - first created vehicle is now set as default automatically
- Refuel model - latest_one() now accepts vehicle_id instead of user_id
- Dashboard view - improved handling when no vehicles or refuel records exist
- CSS styles - adjusted dashboard layout and global action padding

README.md

@@ -53,5 +53,13 @@ php -S localhost:8000 -t ./public
 4. Track your fuel consumption and spending through the dashboard.
 5. View detailed stats and graphs to analyze your driving habits.
 
+## Use case diagram
+![](.screenshots/usecase.png)
+## Data logical model
+![](.screenshots/dlm.png)
+
+## Class diagram
+![](.screenshots/class.png)
+
 ## License
 This project is licensed under GPL3.0 and later. More information is available in the `LICENSE` file.

TODO.md

@@ -6,13 +6,39 @@
 - [ ] edit user data - change password, mail...
 
 ## Core of the app
-- [ ] header and navbar
-- [ ] dashboard
-  - [x] css
-  - [ ] its just plain
-  - [ ] graphs
-- [x] Habits list
-  - [ ] css
-- [ ] Habits create
-  - [ ] validate cron input
-- [ ] Habits track
+- [ ] intro tutorial when no car exist or just dont show anything
+- [x] change/set default car
+- [ ] specific car view - charts, fuel records
+- [ ] remove/edit fuel record
+
+## Until release
+- [x] Sync offline data from locale storage
+- [x] Include kilometer state of an car
+- [ ] More charts
+  - [x] Average fuel conusption
+  - [ ] Kilometer state
+- [ ] More cards
+  - [ ] Average fuel conusption in last 30 days
+  - [ ] Kilometer state in last 30 days`
+- [ ] Offline navigation between dashboard and offline form
+
+## What has to be done
+- [x] Vehicle delete
+- [ ] intro tutorial when no car exist or just dont show anything
+- [x] change/set default car
+- [x] hide errors
+
+## Nice to have
+- [ ] specific car view - charts, fuel records
+- [ ] remove/edit fuel record
+- [x] Include kilometer state of an car
+- [ ] More charts
+  - [x] Average fuel conusption
+  - [ ] Kilometer state
+- [ ] More cards
+  - [ ] Average fuel conusption in last 30 days
+  - [ ] Kilometer state in last 30 days`
+- [ ] Offline navigation between dashboard and offline form
+- [ ] Fix vehicle deletion - wrong redirect
+- [ ] Update diagrams in README.md
+

app/controllers/DashboardController.php

@@ -3,29 +3,25 @@ class DashboardController extends Controller {
     public function index() {
         $vehicle = new Vehicle();
         $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
-
-        $default_car = $vehicle->getDefaultVehicle($_SESSION['user']['id']);
+        $default_car = $vehicle->getDefaultVehicle($_SESSION['user']['id']) ?? null;
 
         $refuel = new Refuel();
         $data = [
             "date" => [],
             "price" => [],
+            "mileage" => [],
+            "liters" => []
         ];
-        $raw_data = $refuel->latest_data($default_car['id'], 5);
+        $raw_data = $default_car ? $refuel->latest_data($default_car['id'], 5) : [];
         foreach($raw_data as $one) {
             array_push($data['date'], date('d. m.', strtotime($one['created_at'])));
             array_push($data['price'], $one['price_per_liter']);
+            array_push($data['mileage'], $one['mileage']);
+            array_push($data['liters'], $one['liters']);
         }
 
-        $latest_record = [
-            'name',
-            'liters',
-            'price_per_liter',
-            'total_price',
-            'created_at'
-        ];
-
-        $latest_record = $refuel->latest_one($_SESSION['user']['id'])[0];
+        $latest_data = $default_car ? $refuel->latest_one($default_car['id']) : [];
+        $latest_record = !empty($latest_data) ? $latest_data[0] : null;
 
         $this->view('dashboard/index', [
             'title' => 'Dashboard',

app/controllers/RefuelController.php

@@ -18,6 +18,7 @@ class RefuelController extends Controller {
             $liters = $_POST['liters'] ?? '';
             $price_per_liter = $_POST['price_per_liter'] ?? '';
             $total_price = $_POST['total_price'] ?? '';
+            $mileage = $_POST['mileage'] ?? '';
             $note = $_POST['note'] ?? '';
 
             $validator = new Validator();
@@ -29,6 +30,7 @@ class RefuelController extends Controller {
             $validator->number('liters', $liters);
             $validator->number('price_per_liter', $price_per_liter);
             $validator->number('total_price', $total_price);
+            $validator->number('mileage', $mileage);
 
             if (round($liters * $price_per_liter, 2) != $total_price) {
                 $validator->setErrors(["total_price" => "Price calculation is wrong"]);
@@ -57,6 +59,7 @@ class RefuelController extends Controller {
                 'liters' => $liters,
                 'price_per_liter' => $price_per_liter,
                 'total_price' => $total_price,
+                'mileage' => $mileage,
             ]);
 
             if ($result === true) {

app/controllers/VehicleController.php

@@ -30,17 +30,21 @@ class VehicleController extends Controller {
             }
 
             $vehicle = new Vehicle();
+            $default_vehicle = $vehicle->getDefaultVehicle($_SESSION['user']['id']);
+            $is_default = $default_vehicle ? 0 : 1;
+
             $result = $vehicle->create([
                 'name' => $name,
                 'registration_plate' => strtoupper($registration_plate),
                 'fuel_type' => $fuel_type,
                 'note' => $note,
                 'user_id' => $_SESSION['user']['id'],
+                'is_default' => $is_default
             ]);
 
 
             if ($result === true) {
-                $this->redirect('/vehicles');
+                $this->redirect('/');
             } else {
                 $this->view('vehicles/create', ['title' => 'Create vehicle', 'error' => $result, 'validationErrors' => []] );
             }
@@ -52,10 +56,49 @@ class VehicleController extends Controller {
 
 
     public function edit() {
-        // Edit vehicle (to be implemented later)
+        // TODO: Edit vehicle (to be implemented later)
     }
 
     public function delete() {
-        // Delete vehicle (to be implemented later)
+        if(!$_SERVER['REQUEST_METHOD'] === 'POST') {
+            echo "Wrong method";
+            return;
+        }
+
+        // TODO: Validate the request
+        $vehicle_id = $_POST['vehicle_id'];
+
+        $vehicle = new Vehicle();
+        $result = $vehicle->delete($vehicle_id, $_SESSION['user']['id']);
+
+        if($result != true) {
+            echo "Something went wrong";
+            return;
+        }
+
+        header("Location: /vehicles");
+    }
+
+    public function setDefault() {
+        $vehicle = new Vehicle();
+        // TODO: Validate the request
+        $result = $vehicle->setDefaultVehicle($_POST['vehicle_id'], $_SESSION['user']['id']);
+        if($result != true) {
+            echo "Something went wrong";
+            return;
+        }
+
+        header("Location: /");
+    }
+
+    public function api_get() {
+        if(!$_SERVER['REQUEST_METHOD'] === 'GET') {
+            echo "Wrong method, use GET";
+            return;
+        }
+
+        $vehicle = new Vehicle();
+        $result = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
+        echo json_encode($result);
     }
 }

app/models/Refuel.php

@@ -10,12 +10,12 @@ class Refuel {
     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())
+                INSERT INTO refueling_records (user_id, vehicle_id, fuel_type, note, liters, price_per_liter, total_price, mileage, created_at)
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?, NOW())
             ");
 
             $stmt->bind_param(
-                "iissddd",
+                "iissdddi",
                 $data['user_id'],
                 $data['vehicle_id'],
                 $data['fuel_type'],
@@ -23,6 +23,7 @@ class Refuel {
                 $data['liters'],
                 $data['price_per_liter'],
                 $data['total_price'],
+                $data['mileage'],
             );
 
             if ($stmt->execute()) {
@@ -38,7 +39,7 @@ class Refuel {
     public function latest_data($vehicle_id, $record_count) {
         try {
             $stmt = $this->db->prepare("
-                SELECT `liters`, `price_per_liter`, `total_price`, `created_at`
+                SELECT `liters`, `price_per_liter`, `total_price`, `mileage`, `created_at`
                 FROM `refueling_records`
                 WHERE `vehicle_id` = ?
                 ORDER BY created_at DESC
@@ -59,7 +60,7 @@ class Refuel {
         }
     }
 
-    public function latest_one($user_id, $record_count = 1) {
+    public function latest_one($vehicle_id, $record_count = 1) {
         try {
             $stmt = $this->db->prepare("
                 SELECT 
@@ -68,15 +69,17 @@ class Refuel {
                     `r`.`liters`, 
                     `r`.`price_per_liter`, 
                     `r`.`total_price`, 
+                    `r`.`mileage`, 
+                    `r`.`note`, 
                     `r`.`created_at`
                 FROM `refueling_records` AS `r`
                 JOIN `vehicles` AS `v` ON `r`.`vehicle_id` = `v`.`id`
-                WHERE `r`.`user_id` = ?
+                WHERE `r`.`vehicle_id` = ?
                 ORDER BY `r`.`created_at` DESC
                 LIMIT ?;
             ");
 
-            $stmt->bind_param("ii", $user_id, $record_count);
+            $stmt->bind_param("ii", $vehicle_id, $record_count);
             if ($stmt->execute()) {
                 $result = $stmt->get_result();
                 $data = $result->fetch_all(MYSQLI_ASSOC);

app/models/User.php

@@ -29,7 +29,7 @@ class User {
 
         $hashedPassword = password_hash($password, PASSWORD_BCRYPT);
 
-        $stmt = $this->db->prepare("INSERT INTO users (username, email, password, points, created_at) VALUES (?, ?, ?, 0, NOW())");
+        $stmt = $this->db->prepare("INSERT INTO users (username, email, password, created_at) VALUES (?, ?, ?, NOW())");
         $stmt->bind_param("sss", $username, $email, $hashedPassword);
 
         if ($stmt->execute()) {

app/models/Vehicle.php

@@ -10,17 +10,18 @@ class Vehicle {
     public function create($data) {
         try{
             $stmt = $this->db->prepare("
-                INSERT INTO vehicles (user_id, name, registration_plate, fuel_type, note, created_at)
-                VALUES (?, ?, ?, ?, ?, NOW())
+                INSERT INTO vehicles (user_id, name, registration_plate, fuel_type, note, is_default, created_at)
+                VALUES (?, ?, ?, ?, ?, ?, NOW())
             ");
 
             $stmt->bind_param(
-                "issss",
+                "issssi",
                 $data['user_id'],
                 $data['name'],
                 $data['registration_plate'],
                 $data['fuel_type'],
                 $data['note'],
+                $data['is_default'],
             );
 
             if ($stmt->execute()) {
@@ -60,4 +61,61 @@ class Vehicle {
 
         return $result->fetch_assoc();
     }
+
+    public function setDefaultVehicle($vehicle_id, $user_id) {
+        try {
+            $this->db->begin_transaction();
+
+            $stmt = $this->db->prepare("
+                UPDATE `vehicles` 
+                SET `is_default` = 0 
+                WHERE `user_id` = ? AND `is_default` = 1
+            ");
+            $stmt->bind_param("i", $user_id);
+            $stmt->execute();
+            $stmt->close();
+
+            $stmt = $this->db->prepare("
+                UPDATE `vehicles` 
+                SET `is_default` = 1 
+                WHERE `id` = ? AND `user_id` = ?
+            ");
+            $stmt->bind_param("ii", $vehicle_id, $user_id);
+
+            if ($stmt->execute()) {
+                $this->db->commit();
+                return true;
+            } else {
+                $this->db->rollback();
+                return "Error: " . $stmt->error;
+            }
+        } catch (mysqli_sql_exception $e) {
+            $this->db->rollback();
+            return $e->getMessage();
+        }
+    }
+
+    public function delete($vehicle_id, $user_id) {
+        try {
+            $stmt = $this->db->prepare("SELECT id FROM vehicles WHERE id = ? AND user_id = ?");
+            $stmt->bind_param("ii", $vehicle_id, $user_id);
+            $stmt->execute();
+            $result = $stmt->get_result();
+
+            if ($result->num_rows === 0) {
+                return "Error: Unauthorized action or vehicle not found.";
+            }
+
+            $stmt = $this->db->prepare("DELETE FROM vehicles WHERE id = ?");
+            $stmt->bind_param("i", $vehicle_id);
+
+            if ($stmt->execute()) {
+                return true;
+            } else {
+                return "Error: " . $stmt->error;
+            }
+        } catch (mysqli_sql_exception $e) {
+            return $e->getMessage();
+        }
+    }
 }

app/views/dashboard/index.php

@@ -1,10 +1,21 @@
 <link rel="stylesheet" href="/css/dashboard.css">
 
+<link rel="stylesheet" href="/css/form.css">
+<link rel="stylesheet" href="/css/vehicle_create.css">
+
 <section class="dashboard">
     <h1>Welcome, <?= htmlspecialchars($_SESSION['user']['username']) ?>!</h1>
-    <div>
-        <a href="/refuel/create" class="btn-green">Add new refuel record!</a>
+    <?php if(!isset($data['default_car'])): ?>
+    
+    <div id="intro">
+        <a href="/vehicles/create">Create your first vehicle</a>
+    </div>
+    <?php elseif (isset($data['latest_record'])): ?>
+
+    <div id="actions">
+        <a href="/refuel/create" class="btn-green">Add new refuel record</a>
         <a href="/vehicles" class="btn-primary">List all vehicles</a>
+        <a class="btn-warning" id="btn-offline-add">Add new offline refuel record</a>
     </div>
     <div class="card-wrapper">
         <section class="card latest">
@@ -19,6 +30,12 @@
                 <p><?= $data['latest_record']['price_per_liter'] ?>,-/liter</p>
                 <b>Total price:</b>
                 <p><?= $data['latest_record']['total_price'] ?>,-</p>
+                <b>Mileage:</b>
+                <p><?= $data['latest_record']['mileage'] ?> km</p>
+                <?php if (isset($data['latest_record']['note'])): ?>
+                <b>Note:</b>
+                <p><?= $data['latest_record']['note'] ?></p>
+                <?php endif; ?>
             </div>
         </section>
 
@@ -41,10 +58,28 @@
             <p><?= $data['default_car']['name'] . " | " . $data['default_car']['registration_plate']?></p>
             <canvas id="chart-gas-price"></canvas>
         </section>
+
+        <section class="card history-graph">
+            <h2>Average fuel consumption</h2>
+            <hr>
+            <p><?= $data['default_car']['name'] . " | " . $data['default_car']['registration_plate']?></p>
+            <b id="avg-fl-cnsmp"></b>
+        </section>
     </div>
+    <?php else: ?>
+    <div id="actions">
+        <a href="/refuel/create" class="btn-green">Add new refuel record</a>
+        <a href="/vehicles" class="btn-primary">List all vehicles</a>
+        <a class="btn-warning" id="btn-offline-add">Add new offline refuel record</a>
+    </div>
+    <div class="alert-warning">
+        <p>Default vehicle <b><i><?= $data['default_car']['name'] ?></i></b> doesn't have any refuel record yet.</p>
+        <p>Select another vehicle or create first refuel record.</p>
+    </div>
+    <?php endif; ?>
 </section>
-    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
-    <script>
+<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+<script>
     const ctx = document.getElementById('chart-gas-price');
     const data = <?= json_encode($data['date_price_data']); ?>;
 
@@ -60,3 +95,28 @@
         },
     });
 </script>
+
+<script>
+    const data2 = <?= json_encode($data['date_price_data']); ?>;
+    let cnt_ltr = 0
+    let cnt_km = 0
+    let first_km = 0
+
+    console.log(data2)
+
+    for(let i = 0; i < data2['liters'].length; i++) {
+        if(i == 0) {
+            first_km = data2['mileage'][i]
+        }
+        cnt_ltr += data2['liters'][i]
+        cnt_km =+ data2['mileage'][i]
+    }
+
+    console.log("Liters", cnt_ltr, cnt_km, first_km)
+    console.log("Avg", (cnt_km - first_km) / cnt_ltr)
+
+    document.querySelector("#avg-fl-cnsmp").textContent = Math.floor((cnt_km - first_km) / cnt_ltr) + " l/100km"
+</script>
+
+
+<script defer src="/js/offline-records.js"></script>

app/views/refuel/create.php

@@ -52,6 +52,12 @@
             <small class="error"><?= $this->get('validationErrors')['total_price'] ?></small>
         <?php endif; ?>
 
+        <label for="mileage">Mileage</label>
+        <input type="number" name="mileage" id="mileage" min="0" step="1" value="<?= htmlspecialchars($_POST['mileage'] ?? '0') ?>">
+        <?php if (isset($this->get('validationErrors')['mileage'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['mileage'] ?></small>
+        <?php endif; ?>
+
         <label for="note">Note</label>
         <input type="text" name="note" id="note" value="<?= htmlspecialchars($_POST['note'] ?? '') ?>">
         <?php if (isset($this->get('validationErrors')['note'])): ?>

app/views/vehicles/index.php

@@ -4,7 +4,7 @@
         <p>No vehicles yet. <a href="/vehicles/create">Add your first vehicle</a>.</p>
     <?php else: ?>
         <div class="btn-wrapper">
-            <a href="/vehicles/create" class="btn-green">Add new vehicle!</a>
+            <a href="/vehicles/create" class="btn-green">Add new vehicle</a>
         </div>
         <div class="vehicle-wrapper">
         <?php foreach ($this->get('vehicles') as $vehicle): ?>
@@ -13,9 +13,19 @@
                 <p><?= htmlspecialchars($vehicle['registration_plate']) ?></p>
                 <p><?= htmlspecialchars($vehicle['fuel_type']) ?></p>
                 <p><?= htmlspecialchars($vehicle['note'] ?? "") ?></p>
+
                 <div class="actions">
-                    <a href="/vehicles/edit?id=<?= $vehicle['id'] ?>">Edit</a>
-                    <a href="/vehicles/delete?id=<?= $vehicle['id'] ?>" onclick="return confirm('Are you sure you want to delete this habit?')">Delete</a>
+                    <br>
+                    <form method="POST" action="/vehicles/delete">
+                        <input type="number" name="vehicle_id" value="<?= $vehicle['id'] ?>" style="display: none">
+                        <input type="submit" value="Delete vehicle" class="btn-danger">
+                    </form>
+
+                    <br>
+                    <form method="POST" action="/vehicles/default">
+                        <input type="number" name="vehicle_id" value="<?= $vehicle['id'] ?>" style="display: none">
+                        <input type="submit" value="Set as default" class="btn-primary">
+                    </form>
                 </div>
             </div>
         <?php endforeach; ?>

core/Database.php

@@ -63,7 +63,6 @@ class Database {
             username VARCHAR(50) NOT NULL,
             email VARCHAR(100) NOT NULL UNIQUE,
             password VARCHAR(255) NOT NULL,
-            points INT DEFAULT 0,
             created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
         ) ENGINE=InnoDB;";
 
@@ -99,6 +98,7 @@ class Database {
                 liters DOUBLE(10, 2) NOT NULL,
                 price_per_liter DOUBLE(10, 2) NOT NULL,
                 total_price DOUBLE(10, 2) NOT NULL,
+                mileage INT UNSIGNED NULL,
                 created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                 FOREIGN KEY (vehicle_id) REFERENCES vehicles(id) ON DELETE CASCADE,
                 FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE

docker-compose.yaml

@@ -6,6 +6,8 @@ services:
       MARIADB_ROOT_PASSWORD: root
     ports:
       - 3306:3306
+    networks:
+      - fuelstats-network
     profiles: ["prod", "dev"]
 
   phpmyadmin:
@@ -15,6 +17,11 @@ services:
       - 8080:80
     environment:
       - PMA_ARBITRARY=1
+      - PMA_HOST=mariadb
+    depends_on:
+      - mariadb
+    networks:
+      - fuelstats-network
     profiles: ["dev"]
 
   fuelstats:
@@ -28,4 +35,10 @@ services:
     depends_on:
       - mariadb
     restart: on-failure:2
+    networks:
+      - fuelstats-network
     profiles: ["prod"]
+
+networks:
+  fuelstats-network:
+    driver: bridge

public/css/dashboard.css

@@ -9,7 +9,6 @@
   flex-wrap: wrap;
   gap: 1rem;
   justify-content: center;
-  margin-top: 2rem;
 }
 
 .card {
@@ -19,3 +18,21 @@
   width: 18rem;
   padding: 1rem;
 }
+
+#btn-offline-add {
+  display: none;
+}
+
+.alert-warning {
+  background-color: var(--clr-warning-muted);
+  border: var(--borderWidth-thin) solid var(--clr-border-danger);
+  padding: 1rem;
+  border-radius: var(--border-radious);
+}
+
+.alert-danger {
+  background-color: var(--clr-danger-muted);
+  border: var(--borderWidth-thin) solid var(--clr-border-danger);
+  padding: 1rem;
+  border-radius: var(--border-radious);
+}

public/css/global.css

@@ -20,13 +20,15 @@ h1 {
 .btn-secondary,
 .btn-tertiary,
 .btn-green,
-.btn-danger {
+.btn-danger,
+.btn-warning {
 	background-color: var(--clr-primary);
 	padding: .5rem;
 	text-decoration: none;
 	cursor: pointer;
 	border-radius: var(--border-radious);
 	border: var(--borderWidth-thin) solid var(--clr-border);
+	color: white;
 }
 
 .btn-secondary {
@@ -45,3 +47,13 @@ h1 {
 	background-color: var(--clr-danger-muted);
 	border: var(--borderWidth-thin) solid var(--clr-border-danger);
 }
+
+.btn-warning {
+	background-color: var(--clr-warning-muted);
+	border: var(--borderWidth-thin) solid var(--clr-border-danger);
+}
+
+#actions {
+	padding-top: 1rem;
+	padding-bottom: 2rem;
+}

public/css/vars.css

@@ -5,6 +5,7 @@
   --clr-tertiary: #151b23;
   --clr-green: #238636;
   --clr-danger-muted: #f851491a;
+  --clr-warning-muted: #e08e455e;
 
   --clr-link-blue: #4493f8;
   --clr-light-blue: #39a2ae;

public/index.php

@@ -46,11 +46,17 @@ $router->group('/vehicles', ['RequireAuth'], function ($router) {
     $router->add('', 'VehicleController@index');
     $router->add('/create', 'VehicleController@create');
     $router->add('/edit/{id}', 'VehicleController@edit');
-    $router->add('/delete/{id}', 'VehicleController@delete');
+    $router->add('/delete', 'VehicleController@delete');
+    $router->add('/default', 'VehicleController@setDefault');
 });
 
 $router->group('/refuel', ['RequireAuth'], function ($router) {
     $router->add('/create', 'RefuelController@create');
 });
 
+// API
+$router->group('/api/v1', ['RequireAuth'], function ($router) {
+    $router->add('/vehicles/get', 'VehicleController@api_get');
+});
+
 $router->dispatch();

public/js/offline-records.js

@@ -0,0 +1,247 @@
+async function checkOnline() {
+	if (!navigator.onLine) {
+		console.log("Offline (no network connection)");
+		return false;
+	}
+
+	try {
+		const response = await fetch(
+			"https://www.google.com/favicon.ico?" + new Date().getTime(),
+			{
+				mode: "no-cors",
+			},
+		);
+		return true;
+	} catch (error) {
+		console.log("Connected to network but no internet access");
+		return false;
+	}
+}
+
+function showDashboard() {
+	const offline = document.querySelector(".offline");
+	offline.remove();
+	document.querySelector(".dashboard").style.display = "flex";
+}
+
+const btnOffline = document.querySelector("#btn-offline-add");
+const divActions = document.querySelector("#actions");
+let visible = true;
+
+setInterval(async () => {
+	const isOnline = await checkOnline();
+	//const isOnline = false; // REMOVE!!!
+	if (!isOnline) {
+		if (visible) {
+			console.log("OFFLINE!!!");
+			Array.from(divActions.children).forEach(
+				(el) => (el.style.display = "none"),
+			);
+			visible = false;
+
+			btnOffline.style.display = "block";
+
+			document.querySelector(".hd-left").addEventListener("click", () => {
+				showDashboard();
+			});
+		}
+
+		if (localStorage.getItem("refuelOfflineData")) {
+			btnOffline.textContent = "Sync data";
+			btnOffline.setAttribute("disabled", "disabled");
+		}
+	}
+
+	if (isOnline && !visible) {
+		console.log("BACK ONLINE!!!");
+		visible = true;
+		btnOffline.removeAttribute("disabled", "disabled");
+		// TODO: show buttons back, add sync button instead of record creation
+		// If user is in a process of adding new offline refuel record, let him finish
+		// Clear the local storage on each login
+	}
+	//}, 5000);
+}, 1000);
+
+window.onload = async () => {
+	const rawData = await fetch("/api/v1/vehicles/get", {
+		method: "GET",
+		credentials: "include",
+	});
+	const data = await rawData.json();
+	console.log("Fetched:", data);
+	localStorage.setItem("vehicles", JSON.stringify(data));
+	console.log(JSON.parse(localStorage.getItem("vehicles")));
+};
+
+btnOffline.addEventListener("click", async (e) => {
+	e.preventDefault();
+
+	if (btnOffline.textContent == "Sync data") {
+		if (!visible) {
+			alert("You're still offline. Try again later");
+			return;
+		}
+
+		try {
+			let data = localStorage.getItem("refuelOfflineData");
+			if (!data) {
+				console.error("No offline data found");
+				alert("No offline data found");
+				return;
+			}
+
+			data = JSON.parse(data);
+			const formData = new FormData();
+
+			for (const key in data) {
+				if (data.hasOwnProperty(key)) {
+					formData.append(key, data[key]);
+				}
+			}
+
+			const res = await fetch("/refuel/create", {
+				method: "POST",
+				body: formData,
+				credentials: "include",
+			});
+
+			if (!res.ok) {
+				throw new Error(`Server error: ${res.statusText}`);
+			}
+
+			localStorage.removeItem("refuelOfflineData");
+			location.reload();
+		} catch (err) {
+			console.error(err);
+			alert("Something went wrong");
+			location.reload();
+		}
+		return;
+	}
+
+	document.querySelector("section.dashboard").style.display = "none";
+
+	try {
+		vehicles = localStorage.getItem("vehicles");
+		if (vehicles === null) throw new Error("No data was saved locally");
+		vehicles = JSON.parse(vehicles);
+	} catch (err) {
+		console.error(err);
+		const offline = document.createElement("div");
+		offline.classList.add("offline");
+		offline.innerHTML = `
+            <div class="alert-danger">
+                <b>You're Offline</b>
+                <p>No data was saved locally, please try again later</p>
+            </div>
+        `;
+		document.querySelector("main").appendChild(offline);
+		// TODO: Add button to navigate back to offline dashboard
+		return;
+	}
+
+	const offline = document.createElement("div");
+	offline.classList.add("offline");
+	offline.innerHTML = `
+    <div class="alert-warning">
+        <b>You're Offline</b>
+        <p>You can create an fuel record locally on your device and sync it later</p>
+    </div>
+    <section class="form">
+        <h1 class="header-form">Create offline record</h1>
+        <!-- <?php if ($this->get('error')): ?> -->
+        <!--     <div class="error" style="color: red; margin-bottom: 1rem;"> -->
+        <!--         <?= htmlspecialchars($this->get('error')) ?> -->
+        <!--     </div> -->
+        <!-- <?php endif; ?> -->
+        <form id="offline_refuel_add">
+            <label for="vehicle">Vehicle</label>
+            <select name="vehicle" id="vehicle">
+            ${vehicles
+							.map(
+								(el) =>
+									`<option value="${el.id}">${el.name} | ${el.registration_plate}</option>`,
+							)
+							.join("")}
+            <!-- <?php foreach ($this->get('vehicles') as $vehicle): ?> -->
+            <!--     <option value="<?= $vehicle['id'] ?>"><?= $vehicle['name'] . " | " . $vehicle['registration_plate'] ?></option> -->
+            <!-- <?php endforeach; ?> -->
+            </select>
+            <!-- <?php if (isset($this->get('validationErrors')['vehicle'])): ?> -->
+            <!--     <small class="error"><?= $this->get('validationErrors')['vehicle'] ?></small> -->
+            <!-- <?php endif; ?> -->
+
+            <label for="fuel_type">Fuel type</label>
+            <select name="fuel_type" id="fuel_type">
+                <option value="Diesel">Diesel</option>
+                <option value="Gasoline 95">Gasoline 95</option>
+                <option value="Gasoline 98">Gasoline 98</option>
+                <option value="Premium Diesel">Premium Diesel</option>
+                <option value="Premium Gasoline 95">Premium Gasoline 95</option>
+                <option value="Premium Gasoline 98">Premium Gasoline 98</option>
+                <option value="Other">Other</option>
+            </select>
+            <!-- <?php if (isset($this->get('validationErrors')['fuel_type'])): ?> -->
+            <!--     <small class="error"><?= $this->get('validationErrors')['fuel_type'] ?></small> -->
+            <!-- <?php endif; ?> -->
+
+            <label for="liters">Liters</label>
+            <input type="number" name="liters" id="liters" min="0" step=".01" value="0.0">
+            <!-- <?php if (isset($this->get('validationErrors')['liters'])): ?> -->
+            <!--     <small class="error"><?= $this->get('validationErrors')['liters'] ?></small> -->
+            <!-- <?php endif; ?> -->
+
+            <label for="price_per_liter">Price per liter</label>
+            <input type="number" name="price_per_liter" id="price_per_liter" min="0" step=".01" value="0.0">
+            <!-- <?php if (isset($this->get('validationErrors')['price_per_liter'])): ?> -->
+            <!--     <small class="error"><?= $this->get('validationErrors')['price_per_liter'] ?></small> -->
+            <!-- <?php endif; ?> -->
+
+            <label for="total_price">Total price</label>
+            <input type="number" name="total_price" id="total_price" min="0" step=".01" value="0.0">
+            <!-- <?php if (isset($this->get('validationErrors')['total_price'])): ?> -->
+            <!--     <small class="error"><?= $this->get('validationErrors')['total_price'] ?></small> -->
+            <!-- <?php endif; ?> -->
+
+        		<label for="mileage">Mileage</label>
+        		<input type="number" name="mileage" id="mileage" min="0" step="1" value="0">
+        		<!-- <?php if (isset($this->get('validationErrors')['mileage'])): ?> -->
+         		<!--    	<small class="error"><?= $this->get('validationErrors')['mileage'] ?></small> -->
+        		<!-- <?php endif; ?> -->
+
+            <label for="note">Note</label>
+            <input type="text" name="note" id="note">
+            <!-- <?php if (isset($this->get('validationErrors')['note'])): ?> -->
+            <!--     <small class="error"><?= $this->get('validationErrors')['note'] ?></small> -->
+            <!-- <?php endif; ?> -->
+
+            <input type="submit" id="btn-offline-submit" value="Create fuel record">
+        </form>
+    </section>
+  `;
+	document.querySelector("main").appendChild(offline);
+	const btnSubmit = document.querySelector("#btn-offline-submit");
+	btnSubmit.addEventListener("click", (e) => {
+		e.preventDefault();
+		const formData = {
+			vehicle: document.querySelector("form#offline_refuel_add #vehicle").value,
+			fuel_type: document.querySelector("form#offline_refuel_add #fuel_type")
+				.value,
+			liters: document.querySelector("form#offline_refuel_add #liters").value,
+			price_per_liter: document.querySelector(
+				"form#offline_refuel_add #price_per_liter",
+			).value,
+			total_price: document.querySelector(
+				"form#offline_refuel_add #total_price",
+			).value,
+			mileage: document.querySelector("form#offline_refuel_add #mileage").value,
+			note: document.querySelector("form#offline_refuel_add #note").value,
+		};
+
+		console.log("formData", formData);
+		localStorage.setItem("refuelOfflineData", JSON.stringify(formData));
+		alert("Data was locally saved. Sync it later!");
+		showDashboard();
+	});
+});