first upload all files

app/Http/Middleware/CheckForMaintenanceMode.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Closure;
+use Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode as BaseCheckForMaintenanceMode;
+
+class CheckForMaintenanceMode extends BaseCheckForMaintenanceMode
+{
+    /**
+     * The URIs that should be accessible while maintenance mode is enabled.
+     *
+     * @var array
+     */
+    protected $except = [
+        '*/admin*',
+    ];
+
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     *
+     * @throws \Symfony\Component\HttpKernel\Exception\HttpException
+     * @throws \Illuminate\Foundation\Http\Exceptions\MaintenanceModeException
+     */
+    public function handle($request, Closure $next)
+    {
+        if (
+            config('app.installed')
+            && $this->app->isDownForMaintenance()
+            && optional(auth()->user())->hasRoleName('Admin')
+        ) {
+            return $next($request);
+        }
+
+        return parent::handle($request, $next);
+    }
+}

app/Http/Middleware/ConvertStringBooleans.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Illuminate\Foundation\Http\Middleware\TransformsRequest;
+
+class ConvertStringBooleans extends TransformsRequest
+{
+    /**
+     * Transform the given value.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure $next
+     * @return mixed
+     */
+    protected function transform($key, $value)
+    {
+        if ($value === 'true' || $value === 'TRUE') {
+            return true;
+        }
+
+        if ($value === 'false' || $value === 'FALSE') {
+            return false;
+        }
+
+        return $value;
+    }
+}

app/Http/Middleware/EncryptCookies.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Illuminate\Cookie\Middleware\EncryptCookies as Middleware;
+
+class EncryptCookies extends Middleware
+{
+    /**
+     * The names of the cookies that should not be encrypted.
+     *
+     * @var array
+     */
+    protected $except = [
+        'currency',
+    ];
+}

app/Http/Middleware/RedirectIfInstalled.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Closure;
+
+class RedirectIfInstalled
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if (config('app.installed')) {
+            return redirect()->route('home');
+        }
+
+        return $next($request);
+    }
+}

app/Http/Middleware/RedirectIfShouldNotCreateLicense.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Closure;
+use FleetCart\License;
+
+class RedirectIfShouldNotCreateLicense
+{
+    private $license;
+
+    public function __construct(License $license)
+    {
+        $this->license = $license;
+    }
+
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if ($this->license->valid() || ! $this->license->shouldCreateLicense()) {
+            return redirect()->intended('/admin');
+        }
+
+        return $next($request);
+    }
+}

app/Http/Middleware/RedirectToInstallerIfNotInstalled.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Closure;
+
+class RedirectToInstallerIfNotInstalled
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if (! config('app.installed') && ! $request->is('install/*')) {
+            return redirect()->route('install.pre_installation');
+        }
+
+        return $next($request);
+    }
+}

app/Http/Middleware/RunUpdater.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Closure;
+use FleetCart\Updater;
+
+class RunUpdater
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if (config('app.installed') && file_exists(storage_path('app/update'))) {
+            Updater::run();
+        }
+
+        return $next($request);
+    }
+}

app/Http/Middleware/TrimStrings.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Illuminate\Foundation\Http\Middleware\TrimStrings as BaseTrimmer;
+
+class TrimStrings extends BaseTrimmer
+{
+    /**
+     * The names of the attributes that should not be trimmed.
+     *
+     * @var array
+     */
+    protected $except = [
+        'password',
+        'password_confirmation',
+    ];
+}

app/Http/Middleware/TrustProxies.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Middleware\TrustProxies as Middleware;
+
+class TrustProxies extends Middleware
+{
+    /**
+     * The trusted proxies for this application.
+     *
+     * @var array
+     */
+    protected $proxies = '*';
+
+    /**
+     * The current proxy header mappings.
+     *
+     * @var array
+     */
+    protected $headers =
+        Request::HEADER_X_FORWARDED_FOR |
+        Request::HEADER_X_FORWARDED_HOST |
+        Request::HEADER_X_FORWARDED_PORT |
+        Request::HEADER_X_FORWARDED_PROTO |
+        Request::HEADER_X_FORWARDED_AWS_ELB;
+}

app/Http/Middleware/VerifyCsrfToken.php

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+<?php
+
+namespace FleetCart\Http\Middleware;
+
+use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken as BaseVerifier;
+
+class VerifyCsrfToken extends BaseVerifier
+{
+    /**
+     * The URIs that should be excluded from CSRF verification.
+     *
+     * @var array
+     */
+    protected $except = [
+        //
+    ];
+}