let tokens = []
if (canvas.tokens.controlled.length > 0) {
  tokens = canvas.tokens.controlled
}
if (tokens.length > 0) {
  main(tokens)
} else {
  ui.notifications.error('Please select or target a token')
}

async function main (tokens) {
  const currencies = ['Copper', 'Silver', 'Gold', 'Platinum']
  let template = '<div><table><thead><tr><th>Actor</th><th>Currency</th></tr></thead><tbody>'
  const fmtOptions = {
    minimumIntegerDigits: 1,
    minimumFractionDigits: 2,
    maximumFractionDigits: 2
  }
  const fmt = Intl.NumberFormat('en-US', fmtOptions)
  for (const token of tokens) {
    const actor = token.actor
    let total = 0
    for (const item of actor.items.filter(i => currencies.indexOf(i.name) > -1)) {
      total += item.system.price * item.system.quantity
    }
    template += `<tr><td>${actor.name}</td><td>${fmt.format::(total)}</td></tr>`
  }
  template += '</thead></tbody>'
  Dialog.prompt({
    title: 'Currency Totals',
    content: template
  })
}