Resolve Pricing

curl "https://charter.boats/api/boats/3a121be0-c1f8-4432-8e18-4a125b46da65/pricing?start=2026-08-01&end=2026-08-08" \
  -H "X-API-Key: YOUR_API_KEY"

{
  "prices": [
    {
      "date": "2026-08-01",
      "price": 213.31,
      "source": "season",
      "seasonName": "High Season 2026",
      "isPriced": true,
      "originalPrice": 355.5,
      "discountPercentage": 43,
      "discountName": "43% discount"
    },
    {
      "date": "2026-08-02",
      "price": 0,
      "source": "season",
      "isPriced": false
    },
    {
      "date": "2026-08-03",
      "price": 0,
      "source": "season",
      "isPriced": false
    },
    {
      "date": "2026-08-04",
      "price": 0,
      "source": "season",
      "isPriced": false
    },
    {
      "date": "2026-08-05",
      "price": 0,
      "source": "season",
      "isPriced": false
    },
    {
      "date": "2026-08-06",
      "price": 0,
      "source": "season",
      "isPriced": false
    },
    {
      "date": "2026-08-07",
      "price": 0,
      "source": "season",
      "isPriced": false
    }
  ],
  "extras_processing_percent": 5,
  "summary": {
    "totalDays": 7,
    "charter_unit": "night",
    "pricedDays": 1,
    "unpricedDays": 6,
    "subtotal": 213.31,
    "minPrice": 213.31,
    "maxPrice": 213.31,
    "avgPrice": 213.31
  }
}

const API = 'https://charter.boats/api'
const headers = { 'X-API-Key': process.env.CHARTER_BOATS_API_KEY }
const get = (path) => fetch(`${API}${path}`, { headers }).then((r) => r.json())
 
const range = `start=${checkIn}&end=${checkOut}&product=${encodeURIComponent(product)}`
const { summary, extras_processing_percent } = await get(`/boats/${boatId}/pricing?${range}`)
if (summary.unpricedDays > 0) throw new Error('Not sold for these dates')
 
const fees = await get(`/boats/${boatId}/fees?${range}&guests=${guests}`)
const nights = summary.totalDays // the stay's count in summary.charter_unit — 8 days on a day-clock boat
const weeks = Math.ceil(nights / 7)
const charter = summary.subtotal
 
// The bases we cannot put a figure on: the operator sets them and never tells us what they are,
// or they are net of VAT while we only hold the gross price. A percentage of one of these is a
// RATE to state, never an amount to bill — see "Percentage fees" on the Fees endpoint.
const UNPRICEABLE = [
  'DEFINED_IN_CUSTOM', 'AGENCY_PRICE',
  'PRICELIST_PRICE', 'PRICELIST_PRICE_WITHOUT_VAT', 'CLIENT_PRICE_WITHOUT_VAT',
]
 
function feeCost(f) {
  if (f.amount_is_percentage) {
    // A percentage charged per head has no honest reading — it would multiply the whole
    // charter's share by the crew — so it is a rate too, not a number.
    if (UNPRICEABLE.includes(f.percentage_base) || f.period.startsWith('per_person')) return null
    const base = f.percentage_base === 'DAILY_PRICE' ? charter / nights : charter
    return (base * f.amount) / 100
  }
  switch (f.period) {
    case 'per_day': return f.amount * nights
    case 'per_week': return f.amount * weeks
    case 'per_person': return f.amount * guests
    case 'per_person_per_day':
    case 'per_person_per_night': return f.amount * guests * nights
    case 'per_person_per_week': return f.amount * guests * weeks
    default: return f.amount // per_booking, one_way
  }
}
 
const required = fees.filter((f) => f.required && f.calculation_type !== 'included_in_price')
// A fee we cannot put a number on is settled at the base whatever its calculation_type says —
// we can only bill what we can compute — so it is split out FIRST and quoted as a rate.
const priced = required.filter((f) => feeCost(f) !== null)
const rateOnly = required.filter((f) => feeCost(f) === null)
const online = priced.filter((f) => f.calculation_type === 'advance_payment')
const atBase = priced.filter((f) => f.calculation_type !== 'advance_payment')
 
const SERVICE_FEE = 45 // flat €45 per booking
const onlineExtras = online.reduce((t, f) => t + feeCost(f), 0)
// Extras processing: our sale price carries `extras_processing_percent` of the extras we
// collect at checkout. It is part of the charter price we charge, not a line of its own.
const dueOnline = charter
  + (onlineExtras * extras_processing_percent) / 100
  + onlineExtras
  + SERVICE_FEE
const dueAtBase = atBase.reduce((t, f) => t + feeCost(f), 0)
// …plus whatever `rateOnly` states. Quote those as rates beside the total ("€336 + 10% of a base
// the operator sets"), never folded into it: a sum that silently drops them reads as a complete
// price and is not one.

curl "https://charter.boats/api/boats/3a121be0-c1f8-4432-8e18-4a125b46da65/pricing?start=2026-07-01&end=2026-08-01" \
  -H "X-API-Key: YOUR_API_KEY"