2 nextjs scaffold with store mode shop and admin session experiment wiring event emission v1 (#17)

* chore: cleaning gitignore * formating and env documentation * feat: context switching of hotel/airline depndent on env var via middleware * fixed alignment and building * wrong file * prods * fixed applying style * better session cookie management * tentative session storage with maybe using airtable * migrated api of ingestion * events and products apge * fixing build * 13 create outline for research paper draft (#18) * updated outline for paper from issue * extra paper sections and some formalization of series data * algorithms and acknowledgements * updated outline for paper from issue * upadted text formating * event unification * refactor tracking to ues callbacks instead of refs * implement a pricing display api with session passing * moved middleware to proxy according to new changes in Nextjs * refactoed kafka ingestion to go via backend not web-db * Refactor docker-compose services to use individual Dockerfiles (#20) * Initial plan * Refactor services into individual Dockerfiles Co-authored-by: velocitatem <60182044+velocitatem@users.noreply.github.com> * Add EXPOSE directives to all Dockerfiles with port documentation Co-authored-by: velocitatem <60182044+velocitatem@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: velocitatem <60182044+velocitatem@users.noreply.github.com> * fixing small bugs and adding exepriments to tracking * added some doc
2026-06-01 00:53:36 +00:00 · 2025-11-13 18:07:27 +01:00
parent 7ece6e82cb
commit 37b2099ee0
50 changed files with 2865 additions and 446 deletions
--- a/web/src/components/feats/airline/AirlineCard.tsx
+++ b/web/src/components/feats/airline/AirlineCard.tsx
@@ -0,0 +1,87 @@
+'use client';
+
+import type { EventName } from '@/lib/events';
+import { useHoverTracking } from '@/hooks/useHoverTracking';
+import PriceDisplay from '@/components/ui/PriceDisplay';
+
+const dispatchInteraction = (eventName: EventName, productId?: string, metadata?: Record<string, unknown>) => {
+    const e = new CustomEvent('definedInteraction', {
+        detail: { eventName, productId, metadata },
+    });
+    document.dispatchEvent(e);
+};
+
+type CabinClass = 'economy' | 'premium' | 'business' | 'first';
+type FareRule = 'flexible' | 'standard' | 'basic';
+
+interface Flight {
+    id: string;
+    departure: { time: string; airport: string };
+    arrival: { time: string; airport: string };
+    duration: string;
+    stops: number;
+    cabinClass: CabinClass;
+    fareRule: FareRule;
+    refundable: boolean;
+    basePrice: number;
+}
+
+export default function AirlineCard({ flight }: { flight: Flight }) {
+    const durationRef = useHoverTracking({
+        eventName: 'hover_over_title',
+        productId: flight.id,
+        metadata: { elementText: flight.duration },
+    });
+
+    const priceRef = useHoverTracking({
+        eventName: 'hover_over_paragraph',
+        productId: flight.id,
+        metadata: { elementText: 'price' },
+    });
+
+    const handleCardClick = () => {
+        dispatchInteraction('view_item_page', flight.id, {
+            cabinClass: flight.cabinClass,
+            fareRule: flight.fareRule,
+            price: flight.basePrice,
+        });
+    };
+
+    return (
+        <div
+            className="flight-card cursor-pointer"
+            onClick={handleCardClick}
+        >
+            <div className="flight-timing">
+                <div className="flight-time">{flight.departure.time}</div>
+                <div className="flight-airport">{flight.departure.airport}</div>
+            </div>
+
+            <div className="flight-route">
+                <div ref={durationRef} className="flight-duration">{flight.duration}</div>
+                <div className="flight-stops">
+                    {flight.stops === 0 ? 'Direct' : `${flight.stops} stop${flight.stops > 1 ? 's' : ''}`}
+                </div>
+            </div>
+
+            <div className="flight-timing">
+                <div className="flight-time">{flight.arrival.time}</div>
+                <div className="flight-airport">{flight.arrival.airport}</div>
+            </div>
+
+            <div className="flight-pricing">
+                <div className="fare-class capitalize mb-2">{flight.cabinClass}</div>
+                <div className="text-sm text-[var(--text-secondary)] mb-2 capitalize">{flight.fareRule}</div>
+                {flight.refundable && (
+                    <div className="badge-value text-xs mb-2">Refundable</div>
+                )}
+                <div ref={priceRef}>
+                    <PriceDisplay
+                        productId={flight.id}
+                        className="fare-price"
+                    />
+                </div>
+            </div>
+        </div>
+    );
+}
--- a/web/src/components/feats/airline/AirlineHero.tsx
+++ b/web/src/components/feats/airline/AirlineHero.tsx
@@ -0,0 +1,156 @@
+'use client';
+
+import { useState, FormEvent } from 'react';
+import { Button, Label, Input, DateInput, RadioGroup, Dropdown, DropdownCounter } from '@/components/ui';
+
+type TripType = 'roundtrip' | 'oneway' | 'multicity';
+
+const PlaneIcon = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 19l9 2-9-18-9 18 9-2zm0 0v-8" />
+  </svg>
+);
+
+const LocationIcon = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17.657 16.657L13.414 20.9a1.998 1.998 0 01-2.827 0l-4.244-4.243a8 8 0 1111.314 0z" />
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 11a3 3 0 11-6 0 3 3 0 016 0z" />
+  </svg>
+);
+
+export default function AirlineHero() {
+  const [tripType, setTripType] = useState<TripType>('roundtrip');
+  const [origin, setOrigin] = useState('');
+  const [destination, setDestination] = useState('');
+  const [departDate, setDepartDate] = useState('');
+  const [returnDate, setReturnDate] = useState('');
+  const [passengers, setPassengers] = useState({ adults: 1, children: 0, infants: 0 });
+
+  const handleSearch = (e: FormEvent) => {
+    e.preventDefault();
+    console.log({ tripType, origin, destination, departDate, returnDate, passengers });
+  };
+
+  const totalPax = passengers.adults + passengers.children + passengers.infants;
+
+  return (
+    <div className="hero-section min-h-[70vh] flex items-center justify-center">
+      <div className="w-full max-w-5xl px-4">
+        <div className="text-center mb-8">
+          <h1 className="text-4xl md:text-5xl font-bold mb-4">
+            Book flights at the best prices
+          </h1>
+          <p className="text-lg">
+            Compare hundreds of airlines and find the perfect flight for your journey
+          </p>
+        </div>
+
+        <div className="search-form">
+          <form onSubmit={handleSearch}>
+            <div className="mb-6">
+              <RadioGroup
+                name="tripType"
+                value={tripType}
+                onChange={setTripType}
+                options={[
+                  { value: 'roundtrip', label: 'Round-trip' },
+                  { value: 'oneway', label: 'One-way' },
+                  { value: 'multicity', label: 'Multi-city' },
+                ]}
+              />
+            </div>
+
+            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4">
+              <div>
+                <Label htmlFor="origin">From</Label>
+                <Input
+                  type="text"
+                  id="origin"
+                  value={origin}
+                  onChange={(e) => setOrigin(e.target.value)}
+                  placeholder="Airport or city"
+                  icon={<PlaneIcon />}
+                  required
+                />
+              </div>
+
+              <div>
+                <Label htmlFor="destination">To</Label>
+                <Input
+                  type="text"
+                  id="destination"
+                  value={destination}
+                  onChange={(e) => setDestination(e.target.value)}
+                  placeholder="Airport or city"
+                  icon={<LocationIcon />}
+                  required
+                />
+              </div>
+
+              <div>
+                <Label htmlFor="departDate">Departure</Label>
+                <DateInput
+                  id="departDate"
+                  value={departDate}
+                  onChange={(e) => setDepartDate(e.target.value)}
+                  required
+                />
+              </div>
+
+              <div>
+                <Label htmlFor="returnDate">Return</Label>
+                {tripType === 'roundtrip' ? (
+                  <DateInput
+                    id="returnDate"
+                    value={returnDate}
+                    onChange={(e) => setReturnDate(e.target.value)}
+                    required
+                  />
+                ) : (
+                  <DateInput id="returnDate" disabled />
+                )}
+              </div>
+            </div>
+
+            <div className="grid grid-cols-4 sm:grid-cols-3 lg:grid-cols-4 gap-4 mt-4">
+              <div className="sm:col-span-1 lg:col-span-1">
+                <Label htmlFor="passengers">Passengers</Label>
+                <Dropdown label={`${totalPax} ${totalPax === 1 ? 'passenger' : 'passengers'}`}>
+                  <DropdownCounter
+                    label="Adults"
+                    sublabel="12+ years"
+                    value={passengers.adults}
+                    min={1}
+                    onChange={(v) => setPassengers({ ...passengers, adults: v })}
+                  />
+                  <DropdownCounter
+                    label="Children"
+                    sublabel="2-11 years"
+                    value={passengers.children}
+                    onChange={(v) => setPassengers({ ...passengers, children: v })}
+                  />
+                  <DropdownCounter
+                    label="Infants"
+                    sublabel="Under 2"
+                    value={passengers.infants}
+                    onChange={(v) => setPassengers({ ...passengers, infants: v })}
+                  />
+                </Dropdown>
+              </div>
+            </div>
+
+            <div className="mt-6">
+              <Button type="submit" fullWidth>
+                Search Flights
+              </Button>
+            </div>
+          </form>
+        </div>
+
+        <div className="mt-6 text-center text-sm">
+          <p>Direct flights available · Flexible booking · Compare 500+ airlines worldwide</p>
+        </div>
+      </div>
+    </div>
+  );
+}
--- a/web/src/components/feats/hotel/HotelCard.tsx
+++ b/web/src/components/feats/hotel/HotelCard.tsx
@@ -0,0 +1,98 @@
+'use client';
+
+import type { EventName } from '@/lib/events';
+import { useHoverTracking } from '@/hooks/useHoverTracking';
+import PriceDisplay from '@/components/ui/PriceDisplay';
+
+const dispatchInteraction = (eventName: EventName, productId?: string, metadata?: Record<string, unknown>) => {
+    const e = new CustomEvent('definedInteraction', {
+        detail: { eventName, productId, metadata },
+    });
+    document.dispatchEvent(e);
+};
+
+interface Hotel {
+    id: string;
+    name: string;
+    roomType: string;
+    checkIn: string;
+    checkOut: string;
+    amenities: string[];
+    refundable: boolean;
+    pricePerNight: number;
+    nights: number;
+}
+
+const AmenityIcon = ({ name }: { name: string }) => {
+    const iconMap: Record<string, string> = {
+        wifi: 'Wi-Fi',
+        pool: 'Pool',
+        gym: 'Gym',
+        parking: 'Parking',
+        breakfast: 'Breakfast',
+        spa: 'Spa',
+    };
+    return <span className="feature-tag">{iconMap[name.toLowerCase()] || name}</span>;
+};
+
+export default function HotelCard({ hotel }: { hotel: Hotel }) {
+    const titleRef = useHoverTracking({
+        eventName: 'hover_over_title',
+        productId: hotel.id,
+        metadata: { elementText: hotel.name },
+    });
+
+    const priceRef = useHoverTracking({
+        eventName: 'hover_over_paragraph',
+        productId: hotel.id,
+        metadata: { elementText: 'price' },
+    });
+
+    const handleCardClick = () => {
+        dispatchInteraction('view_item_page', hotel.id, {
+            roomType: hotel.roomType,
+            price: hotel.pricePerNight,
+            nights: hotel.nights,
+        });
+    };
+
+    return (
+        <div
+            className="hotel-card cursor-pointer"
+            onClick={handleCardClick}
+        >
+            <div className="hotel-image bg-gray-200 flex items-center justify-center">
+                <span className="text-gray-400 text-sm">Image</span>
+            </div>
+
+            <div className="hotel-info">
+                <h3 ref={titleRef} className="hotel-name">{hotel.name}</h3>
+                <div className="hotel-location text-sm mb-2">{hotel.roomType}</div>
+                <div className="text-sm text-[var(--text-secondary)] mb-2">
+                    {hotel.checkIn} - {hotel.checkOut}
+                </div>
+                <div className="hotel-features">
+                    {hotel.amenities.map((a) => (
+                        <AmenityIcon key={a} name={a} />
+                    ))}
+                </div>
+                {hotel.refundable && (
+                    <div className="free-cancellation mt-2">Free cancellation</div>
+                )}
+            </div>
+
+            <div className="hotel-pricing">
+                <div ref={priceRef}>
+                    <PriceDisplay
+                        productId={hotel.id}
+                        className="price-wrapper"
+                        perNight
+                    />
+                </div>
+                <div className="text-xs text-[var(--text-secondary)] mt-1">
+                    Total for {hotel.nights} night{hotel.nights > 1 ? 's' : ''}
+                </div>
+            </div>
+        </div>
+    );
+}
--- a/web/src/components/feats/hotel/HotelHero.tsx
+++ b/web/src/components/feats/hotel/HotelHero.tsx
@@ -0,0 +1,103 @@
+'use client';
+
+import { useState, FormEvent } from 'react';
+import { Button, Label, Input, DateInput, Dropdown, DropdownCounter } from '@/components/ui';
+
+const LocationIcon = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17.657 16.657L13.414 20.9a1.998 1.998 0 01-2.827 0l-4.244-4.243a8 8 0 1111.314 0z" />
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 11a3 3 0 11-6 0 3 3 0 016 0z" />
+  </svg>
+);
+
+export default function HotelHero() {
+  const [destination, setDestination] = useState('');
+  const [checkIn, setCheckIn] = useState('');
+  const [checkOut, setCheckOut] = useState('');
+  const [guests, setGuests] = useState({ adults: 2, rooms: 1 });
+
+  const handleSearch = (e: FormEvent) => {
+    e.preventDefault();
+    console.log({ destination, checkIn, checkOut, guests });
+  };
+
+  return (
+    <div className="hero-section min-h-[70vh] flex items-center justify-center">
+      <div className="w-full max-w-4xl px-4">
+        <div className="text-center mb-8">
+          <h1 className="text-4xl md:text-5xl font-bold mb-4">
+            Find your perfect stay
+          </h1>
+          <p className="text-lg">
+            Search hotels, compare prices, and book with confidence
+          </p>
+        </div>
+
+        <form onSubmit={handleSearch} className="search-form">
+          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4">
+            <div className="sm:col-span-2">
+              <Label htmlFor="destination">Where to?</Label>
+              <Input
+                type="text"
+                id="destination"
+                value={destination}
+                onChange={(e) => setDestination(e.target.value)}
+                placeholder="City, hotel, or landmark"
+                icon={<LocationIcon />}
+                required
+              />
+            </div>
+
+            <div>
+              <Label htmlFor="checkIn">Check-in</Label>
+              <DateInput
+                id="checkIn"
+                value={checkIn}
+                onChange={(e) => setCheckIn(e.target.value)}
+                required
+              />
+            </div>
+
+            <div>
+              <Label htmlFor="checkOut">Check-out</Label>
+              <DateInput
+                id="checkOut"
+                value={checkOut}
+                onChange={(e) => setCheckOut(e.target.value)}
+                required
+              />
+            </div>
+
+            <div className="sm:col-span-2 lg:col-span-4">
+              <Label htmlFor="guests">Guests & Rooms</Label>
+              <Dropdown label={`${guests.adults} ${guests.adults === 1 ? 'adult' : 'adults'}, ${guests.rooms} ${guests.rooms === 1 ? 'room' : 'rooms'}`}>
+                <DropdownCounter
+                  label="Adults"
+                  value={guests.adults}
+                  min={1}
+                  onChange={(v) => setGuests({ ...guests, adults: v })}
+                />
+                <DropdownCounter
+                  label="Rooms"
+                  value={guests.rooms}
+                  min={1}
+                  onChange={(v) => setGuests({ ...guests, rooms: v })}
+                />
+              </Dropdown>
+            </div>
+
+            <div className="sm:col-span-2 lg:col-span-4">
+              <Button type="submit" fullWidth>
+                Search Hotels
+              </Button>
+            </div>
+          </div>
+        </form>
+
+        <div className="mt-6 text-center text-sm">
+          <p>Over 2 million hotels worldwide · Best price guarantee · Free cancellation on most bookings</p>
+        </div>
+      </div>
+    </div>
+  );
+}
--- a/web/src/components/ui/Button.tsx
+++ b/web/src/components/ui/Button.tsx
@@ -0,0 +1,20 @@
+import { ReactNode, ButtonHTMLAttributes } from 'react';
+
+type BtnVariant = 'primary' | 'secondary';
+
+interface BtnProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+  variant?: BtnVariant;
+  children: ReactNode;
+  fullWidth?: boolean;
+}
+
+export default function Button({ variant = 'primary', children, fullWidth, className = '', ...props }: BtnProps) {
+  const baseClass = variant === 'primary' ? 'btn-primary' : 'btn-secondary';
+  const widthClass = fullWidth ? 'w-full' : '';
+
+  return (
+    <button className={`${baseClass} ${widthClass} ${className}`.trim()} {...props}>
+      {children}
+    </button>
+  );
+}
--- a/web/src/components/ui/DateInput.tsx
+++ b/web/src/components/ui/DateInput.tsx
@@ -0,0 +1,7 @@
+import { InputHTMLAttributes } from 'react';
+
+interface DateInpProps extends Omit<InputHTMLAttributes<HTMLInputElement>, 'type'> {}
+
+export default function DateInput({ className = '', ...props }: DateInpProps) {
+  return <input type="date" className={`input-field ${className}`.trim()} {...props} />;
+}
--- a/web/src/components/ui/Dropdown.tsx
+++ b/web/src/components/ui/Dropdown.tsx
@@ -0,0 +1,83 @@
+'use client';
+
+import { ReactNode, useState, useRef, useEffect } from 'react';
+
+interface DropdownProps {
+  label: string;
+  children: ReactNode;
+}
+
+export default function Dropdown({ label, children }: DropdownProps) {
+  const [open, setOpen] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const handleClick = (e: MouseEvent) => {
+      if (ref.current && !ref.current.contains(e.target as Node)) {
+        setOpen(false);
+      }
+    };
+
+    document.addEventListener('mousedown', handleClick);
+    return () => document.removeEventListener('mousedown', handleClick);
+  }, []);
+
+  return (
+    <div className="relative" ref={ref}>
+      <button
+        type="button"
+        onClick={() => setOpen(!open)}
+        className="input-field flex justify-between items-center w-full"
+      >
+        <span>{label}</span>
+        <svg className="w-5 h-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
+        </svg>
+      </button>
+      {open && (
+        <div className="absolute z-10 mt-2 w-full bg-white border border-gray-200 rounded-lg shadow-lg p-4">
+          {children}
+        </div>
+      )}
+    </div>
+  );
+}
+
+interface CounterProps {
+  label: string;
+  sublabel?: string;
+  value: number;
+  min?: number;
+  max?: number;
+  onChange: (val: number) => void;
+}
+
+export function DropdownCounter({ label, sublabel, value, min = 0, max = 99, onChange }: CounterProps) {
+  return (
+    <div className="flex justify-between items-center py-3 border-b border-gray-100 last:border-b-0">
+      <div className="flex flex-col">
+        <span className="text-sm font-medium text-gray-900">{label}</span>
+        {sublabel && <span className="text-xs text-gray-500 mt-0.5">{sublabel}</span>}
+      </div>
+      <div className="flex items-center gap-3">
+        <button
+          type="button"
+          onClick={() => onChange(Math.max(min, value - 1))}
+          disabled={value <= min}
+          className="w-9 h-9 rounded-full border-2 border-gray-300 flex items-center justify-center hover:border-blue-500 hover:bg-blue-50 disabled:opacity-40 disabled:cursor-not-allowed disabled:hover:border-gray-300 disabled:hover:bg-transparent transition-colors text-lg font-medium text-gray-700"
+        >
+          −
+        </button>
+        <span className="w-10 text-center font-semibold text-gray-900">{value}</span>
+        <button
+          type="button"
+          onClick={() => onChange(Math.min(max, value + 1))}
+          disabled={value >= max}
+          className="w-9 h-9 rounded-full border-2 border-gray-300 flex items-center justify-center hover:border-blue-500 hover:bg-blue-50 disabled:opacity-40 disabled:cursor-not-allowed disabled:hover:border-gray-300 disabled:hover:bg-transparent transition-colors text-lg font-medium text-gray-700"
+        >
+          +
+        </button>
+      </div>
+    </div>
+  );
+}
--- a/web/src/components/ui/Input.tsx
+++ b/web/src/components/ui/Input.tsx
@@ -0,0 +1,29 @@
+import { InputHTMLAttributes, ReactNode } from 'react';
+
+interface InpProps extends InputHTMLAttributes<HTMLInputElement> {
+    icon?: ReactNode;
+}
+
+export default function Input({ icon, className = '', style, ...props }: InpProps) {
+    const padClass = icon ? 'pl-10' : '';
+    // Fallback if a custom CSS rule still overrides Tailwind
+    const mergedStyle = icon ? { paddingInlineStart: '2.5rem', ...style } : style;
+
+    return (
+        <div className="relative">
+            {icon && (
+                <div
+                    aria-hidden
+                    className="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3 text-gray-400 z-10"
+                >
+                    {icon}
+                </div>
+            )}
+            <input
+                className={`input-field ${className} ${padClass}`}
+                style={mergedStyle}
+                {...props}
+            />
+        </div>
+    );
+}
--- a/web/src/components/ui/Label.tsx
+++ b/web/src/components/ui/Label.tsx
@@ -0,0 +1,13 @@
+import { ReactNode, LabelHTMLAttributes } from 'react';
+
+interface LblProps extends LabelHTMLAttributes<HTMLLabelElement> {
+  children: ReactNode;
+}
+
+export default function Label({ children, className = '', ...props }: LblProps) {
+  return (
+    <label className={`block text-sm font-medium mb-2 ${className}`.trim()} {...props}>
+      {children}
+    </label>
+  );
+}
--- a/web/src/components/ui/Navigation.tsx
+++ b/web/src/components/ui/Navigation.tsx
@@ -0,0 +1,48 @@
+'use client';
+
+import Link from 'next/link';
+import { usePathname } from 'next/navigation';
+import type { EventName } from '@/lib/events';
+
+const dispatchInteraction = (eventName: EventName, metadata?: Record<string, unknown>) => {
+  const e = new CustomEvent('definedInteraction', {
+    detail: { eventName, metadata },
+  });
+  document.dispatchEvent(e);
+};
+
+const NavLink = ({ href, children }: { href: string; children: React.ReactNode }) => {
+  const path = usePathname();
+  const isActive = path === href;
+
+  return (
+    <Link
+      href={href}
+      className={`px-4 py-2 rounded-md transition-colors ${
+        isActive
+          ? 'bg-[var(--accent-primary)] text-white font-semibold'
+          : 'hover:bg-[var(--accent-primary-light)] text-[var(--text-primary)]'
+      }`}
+    >
+      {children}
+    </Link>
+  );
+};
+
+export default function Navigation() {
+  return (
+    <nav className="bg-[var(--bg-primary)] border-b border-gray-200 shadow-sm">
+      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+        <div className="flex justify-between h-16">
+          <div className="flex items-center space-x-1">
+            <NavLink href="/">Home</NavLink>
+            <NavLink href="/products">Products</NavLink>
+            <NavLink href="/search">Search</NavLink>
+            <NavLink href="/cart">Cart</NavLink>
+            <NavLink href="/checkout">Checkout</NavLink>
+          </div>
+        </div>
+      </div>
+    </nav>
+  );
+}
--- a/web/src/components/ui/PriceDisplay.tsx
+++ b/web/src/components/ui/PriceDisplay.tsx
@@ -0,0 +1,136 @@
+'use client';
+
+import { useEffect, useState, useRef } from 'react';
+
+interface PriceDisplayProps {
+    productId: string;
+    className?: string;
+    perNight?: boolean;
+}
+
+interface PricingData {
+    price: number;
+    currency: string;
+    cachedAt: string;
+}
+
+interface SessionData {
+    sessionId: string;
+    experimentId?: string;
+}
+
+const fetchSession = async (): Promise<SessionData> => {
+    try {
+        const res = await fetch('/api/session');
+        const data = await res.json();
+        return {
+            sessionId: data.sessionId || '',
+            experimentId: data.experimentId || '',
+        };
+    } catch (err) {
+        console.error('failed to fetch session:', err);
+        return { sessionId: '', experimentId: '' };
+    }
+};
+
+const formatPrice = (price: number, currency: string) => {
+    return new Intl.NumberFormat('en-US', { // like an std localization
+        style: 'currency',
+        currency,
+    }).format(price);
+};
+
+const isCacheStale = (cachedAt: string, thresholdMs = 60000) => {
+    const cacheTime = new Date(cachedAt).getTime();
+    const now = Date.now();
+    return now - cacheTime > thresholdMs;
+};
+
+export default function PriceDisplay({
+    productId,
+    className = '',
+    perNight = false,
+}: PriceDisplayProps) {
+    const sessionRef = useRef<SessionData | null>(null);
+    const [data, setData] = useState<PricingData | null>(null);
+    const [loading, setLoading] = useState(true);
+    const [error, setError] = useState<string | null>(null);
+
+    useEffect(() => {
+        const initAndFetch = async () => {
+            setLoading(true);
+            setError(null);
+
+            try {
+                // fetch session if not already loaded
+                if (!sessionRef.current) {
+                    sessionRef.current = await fetchSession();
+                }
+
+                const { sessionId, experimentId } = sessionRef.current;
+
+                if (!sessionId) {
+                    setError('Invalid session');
+                    setLoading(false);
+                    return;
+                }
+
+                const params = new URLSearchParams({
+                    productId,
+                    sessionId,
+                    experimentId: experimentId || '',
+                });
+
+                const res = await fetch(`/api/pricing?${params.toString()}`);
+
+                if (!res.ok) {
+                    throw new Error(`Failed to fetch price: ${res.status}`);
+                }
+
+                const pricingData: PricingData = await res.json();
+                setData(pricingData);
+            } catch (err) {
+                setError(err instanceof Error ? err.message : 'Unknown error');
+            } finally {
+                setLoading(false);
+            }
+        };
+
+        initAndFetch();
+    }, [productId]);
+
+    if (loading) {
+        return (
+            <div className={`price-loading ${className}`}>
+                <div className="spinner-border animate-spin inline-block w-4 h-4 border-2 rounded-full" role="status">
+                    <span className="sr-only">Loading...</span>
+                </div>
+            </div>
+        );
+    }
+
+    if (error || !data) {
+        return (
+            <div className={`price-error ${className}`}>
+                <span className="text-red-500 text-sm">Price unavailable</span>
+            </div>
+        );
+    }
+
+    const isStale = isCacheStale(data.cachedAt);
+    const formattedPrice = formatPrice(data.price, data.currency);
+
+    return (
+        <div className={`price-display ${className}`}>
+            <div className="price-amount">
+                {formattedPrice}
+                {perNight && <span className="text-xs ml-1">/night</span>}
+            </div>
+            {isStale && (
+                <span className="price-stale text-xs text-yellow-600" title={`Cached at ${data.cachedAt}`}>
+                    prices may be outdated
+                </span>
+            )}
+        </div>
+    );
+}
--- a/web/src/components/ui/RadioGroup.tsx
+++ b/web/src/components/ui/RadioGroup.tsx
@@ -0,0 +1,33 @@
+'use client';
+
+interface RadioOpt<T extends string> {
+  value: T;
+  label: string;
+}
+
+interface RadioGrpProps<T extends string> {
+  name: string;
+  options: RadioOpt<T>[];
+  value: T;
+  onChange: (val: T) => void;
+}
+
+export default function RadioGroup<T extends string>({ name, options, value, onChange }: RadioGrpProps<T>) {
+  return (
+    <div className="flex gap-4">
+      {options.map((opt) => (
+        <label key={opt.value} className="flex items-center cursor-pointer">
+          <input
+            type="radio"
+            name={name}
+            value={opt.value}
+            checked={value === opt.value}
+            onChange={(e) => onChange(e.target.value as T)}
+            className="mr-2"
+          />
+          <span className="text-sm">{opt.label}</span>
+        </label>
+      ))}
+    </div>
+  );
+}
--- a/web/src/components/ui/index.ts
+++ b/web/src/components/ui/index.ts
@@ -0,0 +1,7 @@
+export { default as Button } from './Button';
+export { default as Label } from './Label';
+export { default as Input } from './Input';
+export { default as DateInput } from './DateInput';
+export { default as RadioGroup } from './RadioGroup';
+export { default as Dropdown, DropdownCounter } from './Dropdown';
+export { default as Navigation } from './Navigation';