flotilla/src/app/components/GoalSummary.svelte

<script lang="ts">
  import {now, DAY, uniq, sum} from "@welshman/lib"
  import type {Zap, TrustedEvent} from "@welshman/util"
  import {getTagValue, fromMsats, ZAP_RESPONSE} from "@welshman/util"
  import {deriveItemsByKey, deriveArray} from "@welshman/store"
  import {repository, getValidZap} from "@welshman/app"
  import Bolt from "@assets/icons/bolt.svg?dataurl"
  import Icon from "@lib/components/Icon.svelte"
  import ZapButton from "@app/components/ZapButton.svelte"

  type Props = {
    url?: string
    event: TrustedEvent
    class?: string
  }

  const {url, event, ...props}: Props = $props()

  const zaps = deriveArray(
    deriveItemsByKey<Zap>({
      repository,
      getKey: zap => zap.response.id,
      filters: [{kinds: [ZAP_RESPONSE], "#e": [event.id]}],
      eventToItem: (response: TrustedEvent) => getValidZap(response, event),
    }),
  )

  const goalAmount = parseInt(getTagValue("amount", event.tags) || "0")
  const zapAmount = $derived(fromMsats(sum($zaps.map(zap => zap.invoiceAmount))))
  const contributorsCount = $derived(uniq($zaps.map(zap => zap.request.pubkey)).length)
  const daysOld = Math.ceil((now() - event.created_at) / DAY)
</script>

<div class="flex flex-col gap-8 {props.class}">
  <div class="flex gap-8">
    <div>
      <p class="text-xl text-primary">{zapAmount} sats</p>
      <p class="text-sm opacity-75">funded of {goalAmount} sats</p>
    </div>
    <div>
      <p class="text-xl">{contributorsCount}</p>
      <p class="text-sm opacity-75">{contributorsCount === 1 ? "contributor" : "contributors"}</p>
    </div>
    <div>
      <p class="text-xl">{daysOld}</p>
      <p class="text-sm opacity-75">{daysOld === 1 ? "day" : "days"} old</p>
    </div>
  </div>
  <progress class="progress" value={zapAmount} max={goalAmount}></progress>
  <ZapButton {url} {event} class="button button-primary lg:m-auto lg:px-20">
    <Icon icon={Bolt} />
    Contribute to this goal
  </ZapButton>
</div>