biblical-guide.com/payload/collections/Prices.ts

import { CollectionConfig } from 'payload';

export const Prices: CollectionConfig = {
  slug: 'prices',
  admin: {
    useAsTitle: 'displayName',
    defaultColumns: ['displayName', 'stripePriceId', 'unitAmount', 'currency', 'active'],
    group: 'E-Commerce',
  },
  fields: [
    {
      name: 'displayName',
      type: 'text',
      admin: {
        readOnly: true,
      },
      hooks: {
        beforeChange: [
          ({ data, siblingData }) => {
            const amount = ((siblingData.unitAmount || 0) / 100).toFixed(2);
            const currency = (siblingData.currency || 'USD').toUpperCase();
            const interval = siblingData.recurring?.interval;

            if (interval) {
              const intervalCount = siblingData.recurring?.intervalCount || 1;
              const label = intervalCount > 1 ? `${intervalCount} ${interval}s` : interval;
              return `${currency} ${amount}/${label}`;
            }
            return `${currency} ${amount}`;
          },
        ],
      },
    },
    {
      name: 'product',
      type: 'relationship',
      relationTo: 'products',
      required: true,
      index: true,
    },
    {
      name: 'stripePriceId',
      type: 'text',
      unique: true,
      index: true,
      admin: {
        readOnly: true,
      },
    },
    {
      name: 'unitAmount',
      type: 'number',
      required: true,
      min: 0,
      admin: {
        description: 'Amount in cents (e.g., 9999 = $99.99)',
      },
    },
    {
      name: 'currency',
      type: 'select',
      options: [
        { label: 'USD ($)', value: 'usd' },
        { label: 'EUR (€)', value: 'eur' },
        { label: 'GBP (£)', value: 'gbp' },
        { label: 'RON (lei)', value: 'ron' },
      ],
      defaultValue: 'usd',
      required: true,
    },
    {
      name: 'recurring',
      type: 'group',
      admin: {
        description: 'Leave empty for one-time prices',
      },
      fields: [
        {
          name: 'interval',
          type: 'select',
          options: [
            { label: 'Daily', value: 'day' },
            { label: 'Weekly', value: 'week' },
            { label: 'Monthly', value: 'month' },
            { label: 'Yearly', value: 'year' },
          ],
          required: true,
          admin: {
            condition: (_, siblingData) => !!siblingData?.interval !== false,
          },
        },
        {
          name: 'intervalCount',
          type: 'number',
          defaultValue: 1,
          min: 1,
          required: true,
        },
        {
          name: 'trialPeriodDays',
          type: 'number',
          min: 0,
          admin: {
            description: 'Number of trial days (optional)',
          },
        },
      ],
    },
    {
      name: 'active',
      type: 'checkbox',
      defaultValue: true,
      required: true,
    },
  ],
  access: {
    read: () => true, // Prices are public
    create: ({ req }) => req.user?.role === 'admin' || req.user?.role === 'super-admin',
    update: ({ req }) => req.user?.role === 'admin' || req.user?.role === 'super-admin',
    delete: ({ req }) => req.user?.role === 'super-admin',
  },
};