degmods.com/src/components/Zap.tsx

import { QRCodeSVG } from 'qrcode.react'
import React, {
  Dispatch,
  ReactNode,
  SetStateAction,
  useCallback,
  useMemo,
  useState
} from 'react'
import Countdown, { CountdownRenderProps } from 'react-countdown'
import { toast } from 'react-toastify'
import { MetadataController, ZapController } from '../controllers'
import { useAppSelector, useDidMount } from '../hooks'
import '../styles/popup.css'
import { PaymentRequest } from '../types'
import {
  copyTextToClipboard,
  formatNumber,
  getZapAmount,
  unformatNumber
} from '../utils'
import { LoadingSpinner } from './LoadingSpinner'

type PresetAmountProps = {
  label: string
  value: number
  setAmount: Dispatch<SetStateAction<number>>
}

export const PresetAmount = React.memo(
  ({ label, value, setAmount }: PresetAmountProps) => {
    return (
      <button
        className='btn btnMain pUMCB_ZapsInsideAmountOptionsBtn'
        type='button'
        onClick={() => setAmount(value)}
      >
        <svg
          xmlns='http://www.w3.org/2000/svg'
          viewBox='-64 0 512 512'
          width='1em'
          height='1em'
          fill='currentColor'
        >
          <path d='M240.5 224H352C365.3 224 377.3 232.3 381.1 244.7C386.6 257.2 383.1 271.3 373.1 280.1L117.1 504.1C105.8 513.9 89.27 514.7 77.19 505.9C65.1 497.1 60.7 481.1 66.59 467.4L143.5 288H31.1C18.67 288 6.733 279.7 2.044 267.3C-2.645 254.8 .8944 240.7 10.93 231.9L266.9 7.918C278.2-1.92 294.7-2.669 306.8 6.114C318.9 14.9 323.3 30.87 317.4 44.61L240.5 224z' />
        </svg>
        {label}
      </button>
    )
  }
)

type ZapPresetsProps = {
  setAmount: Dispatch<SetStateAction<number>>
}

export const ZapPresets = React.memo(({ setAmount }: ZapPresetsProps) => {
  return (
    <>
      <PresetAmount label='1K' value={1000} setAmount={setAmount} />
      <PresetAmount label='5K' value={5000} setAmount={setAmount} />
      <PresetAmount label='10K' value={10000} setAmount={setAmount} />
      <PresetAmount label='25K' value={25000} setAmount={setAmount} />
    </>
  )
})

type ZapButtonsProps = {
  disabled: boolean
  handleGenerateQRCode: () => void
  handleSend: () => void
}

export const ZapButtons = ({
  disabled,
  handleGenerateQRCode,
  handleSend
}: ZapButtonsProps) => {
  return (
    <div className='pUMCB_ZapsInsideBtns'>
      <button
        className='btn btnMain pUMCB_ZapsInsideElementBtn'
        type='button'
        onClick={handleGenerateQRCode}
        disabled={disabled}
      >
        <svg
          xmlns='http://www.w3.org/2000/svg'
          viewBox='-32 0 512 512'
          width='1em'
          height='1em'
          fill='currentColor'
        >
          <path d='M144 32C170.5 32 192 53.49 192 80V176C192 202.5 170.5 224 144 224H48C21.49 224 0 202.5 0 176V80C0 53.49 21.49 32 48 32H144zM128 96H64V160H128V96zM144 288C170.5 288 192 309.5 192 336V432C192 458.5 170.5 480 144 480H48C21.49 480 0 458.5 0 432V336C0 309.5 21.49 288 48 288H144zM128 352H64V416H128V352zM256 80C256 53.49 277.5 32 304 32H400C426.5 32 448 53.49 448 80V176C448 202.5 426.5 224 400 224H304C277.5 224 256 202.5 256 176V80zM320 160H384V96H320V160zM352 448H384V480H352V448zM448 480H416V448H448V480zM416 288H448V416H352V384H320V480H256V288H352V320H416V288z'></path>
        </svg>
      </button>
      <button
        className='btn btnMain pUMCB_ZapsInsideElementBtn'
        type='button'
        onClick={handleSend}
        disabled={disabled}
      >
        <svg
          xmlns='http://www.w3.org/2000/svg'
          viewBox='-64 0 512 512'
          width='1em'
          height='1em'
          fill='currentColor'
        >
          <path d='M240.5 224H352C365.3 224 377.3 232.3 381.1 244.7C386.6 257.2 383.1 271.3 373.1 280.1L117.1 504.1C105.8 513.9 89.27 514.7 77.19 505.9C65.1 497.1 60.7 481.1 66.59 467.4L143.5 288H31.1C18.67 288 6.733 279.7 2.044 267.3C-2.645 254.8 .8944 240.7 10.93 231.9L266.9 7.918C278.2-1.92 294.7-2.669 306.8 6.114C318.9 14.9 323.3 30.87 317.4 44.61L240.5 224z' />
        </svg>
        Send
      </button>
    </div>
  )
}

type ZapQRProps = {
  paymentRequest: PaymentRequest
  handleClose: () => void
  handleQRExpiry: () => void
  setTotalZapAmount?: Dispatch<SetStateAction<number>>
}

export const ZapQR = React.memo(
  ({
    paymentRequest,
    handleClose,
    handleQRExpiry,
    setTotalZapAmount
  }: ZapQRProps) => {
    useDidMount(() => {
      ZapController.getInstance()
        .pollZapReceipt(paymentRequest)
        .then((zapReceipt) => {
          toast.success(`Successfully sent sats!`)
          if (setTotalZapAmount) {
            const amount = getZapAmount(zapReceipt)
            setTotalZapAmount((prev) => prev + amount)
          }
        })
        .catch((err) => {
          toast.error(err.message || err)
        })
        .finally(() => {
          handleClose()
        })
    })

    const onQrCodeClicked = async () => {
      if (!paymentRequest) return

      const zapController = ZapController.getInstance()

      if (await zapController.isWeblnProviderExists()) {
        zapController.sendPayment(paymentRequest.pr)
      } else {
        console.warn('Webln provider not present')

        const href = `lightning:${paymentRequest.pr}`
        const a = document.createElement('a')
        a.href = href
        a.click()
      }
    }

    return (
      <div className='inputLabelWrapperMain' style={{ alignItems: 'center' }}>
        <QRCodeSVG
          className='popUpMainCardBottomQR'
          onClick={onQrCodeClicked}
          value={paymentRequest.pr}
          height={235}
          width={235}
        />
        <label
          className='popUpMainCardBottomLnurl'
          onClick={() => {
            copyTextToClipboard(paymentRequest.pr).then((isCopied) => {
              if (isCopied) toast.success('Lnurl copied to clipboard!')
            })
          }}
        >
          {paymentRequest.pr}
        </label>
        <Timer onTimerExpired={handleQRExpiry} />
      </div>
    )
  }
)

const MAX_POLLING_TIME = 2 * 60 * 1000 // 2 minutes in milliseconds

const renderer = ({ minutes, seconds }: CountdownRenderProps) => (
  <span>
    {minutes}:{seconds}
  </span>
)

type TimerProps = {
  onTimerExpired: () => void
}

const Timer = React.memo(({ onTimerExpired }: TimerProps) => {
  const expiryTime = useMemo(() => {
    return Date.now() + MAX_POLLING_TIME
  }, [])

  return (
    <div>
      <i className='fas fa-clock'></i>
      <Countdown
        date={expiryTime}
        renderer={renderer}
        onComplete={onTimerExpired}
      />
    </div>
  )
})

type ZapPopUpProps = {
  title: string
  labelDescriptionMain?: ReactNode
  receiver: string
  eventId?: string
  aTag?: string
  notCloseAfterZap?: boolean
  lastNode?: ReactNode
  setTotalZapAmount?: Dispatch<SetStateAction<number>>
  handleClose: () => void
}

export const ZapPopUp = ({
  title,
  labelDescriptionMain,
  receiver,
  eventId,
  aTag,
  lastNode,
  notCloseAfterZap,
  setTotalZapAmount,
  handleClose
}: ZapPopUpProps) => {
  const [isLoading, setIsLoading] = useState(false)
  const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
  const [amount, setAmount] = useState<number>(0)
  const [message, setMessage] = useState('')
  const [paymentRequest, setPaymentRequest] = useState<PaymentRequest>()

  const userState = useAppSelector((state) => state.user)

  const handleAmountChange = (event: React.ChangeEvent<HTMLInputElement>) => {
    const unformattedValue = unformatNumber(event.target.value)
    setAmount(unformattedValue)
  }

  const generatePaymentRequest =
    useCallback(async (): Promise<PaymentRequest | null> => {
      let userHexKey: string

      setIsLoading(true)
      setLoadingSpinnerDesc('Getting user pubkey')

      if (userState.auth && userState.user?.pubkey) {
        userHexKey = userState.user.pubkey as string
      } else {
        userHexKey = (await window.nostr?.getPublicKey()) as string
      }

      if (!userHexKey) {
        setIsLoading(false)
        toast.error('Could not get pubkey')
        return null
      }

      setLoadingSpinnerDesc('finding receiver metadata')
      const metadataController = await MetadataController.getInstance()

      const receiverMetadata = await metadataController.findMetadata(receiver)

      if (!receiverMetadata?.lud16) {
        setIsLoading(false)
        toast.error('Lighting address (lud16) is missing in receiver metadata!')
        return null
      }

      if (!receiverMetadata?.pubkey) {
        setIsLoading(false)
        toast.error('pubkey is missing in receiver metadata!')
        return null
      }

      const zapController = ZapController.getInstance()

      setLoadingSpinnerDesc('Creating zap request')
      return await zapController
        .getLightningPaymentRequest(
          receiverMetadata.lud16,
          amount,
          receiverMetadata.pubkey as string,
          userHexKey,
          message,
          eventId,
          aTag
        )
        .catch((err) => {
          toast.error(err.message || err)
          return null
        })
        .finally(() => {
          setIsLoading(false)
        })
    }, [amount, message, userState, receiver, eventId, aTag])

  const handleGenerateQRCode = async () => {
    const pr = await generatePaymentRequest()

    if (!pr) return

    setPaymentRequest(pr)
  }

  const handleSend = useCallback(async () => {
    const pr = await generatePaymentRequest()

    if (!pr) return

    setIsLoading(true)
    setLoadingSpinnerDesc('Sending payment!')

    const zapController = ZapController.getInstance()

    if (await zapController.isWeblnProviderExists()) {
      await zapController
        .sendPayment(pr.pr)
        .then(() => {
          toast.success(`Successfully sent ${amount} sats!`)
          if (setTotalZapAmount) {
            setTotalZapAmount((prev) => prev + amount)
          }

          if (!notCloseAfterZap) {
            handleClose()
          }
        })
        .catch((err) => {
          toast.error(err.message || err)
        })
    } else {
      toast.warn('Webln is not present. Use QR code to send zap.')
      setPaymentRequest(pr)
    }

    setIsLoading(false)
  }, [
    amount,
    notCloseAfterZap,
    handleClose,
    generatePaymentRequest,
    setTotalZapAmount
  ])

  const handleQRExpiry = useCallback(() => {
    setPaymentRequest(undefined)
  }, [])

  const handleQRClose = useCallback(() => {
    setPaymentRequest(undefined)
    setIsLoading(false)
    if (!notCloseAfterZap) {
      handleClose()
    }
  }, [notCloseAfterZap, handleClose])

  return (
    <>
      {isLoading && <LoadingSpinner desc={loadingSpinnerDesc} />}
      <div className='popUpMain'>
        <div className='ContainerMain'>
          <div className='popUpMainCardWrapper'>
            <div className='popUpMainCard popUpMainCardQR'>
              <div className='popUpMainCardTop'>
                <div className='popUpMainCardTopInfo'>
                  <h3>{title}</h3>
                </div>
                <div className='popUpMainCardTopClose' onClick={handleClose}>
                  <svg
                    xmlns='http://www.w3.org/2000/svg'
                    viewBox='-96 0 512 512'
                    width='1em'
                    height='1em'
                    fill='currentColor'
                    style={{ zIndex: 1 }}
                  >
                    <path d='M310.6 361.4c12.5 12.5 12.5 32.75 0 45.25C304.4 412.9 296.2 416 288 416s-16.38-3.125-22.62-9.375L160 301.3L54.63 406.6C48.38 412.9 40.19 416 32 416S15.63 412.9 9.375 406.6c-12.5-12.5-12.5-32.75 0-45.25l105.4-105.4L9.375 150.6c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0L160 210.8l105.4-105.4c12.5-12.5 32.75-12.5 45.25 0s12.5 32.75 0 45.25l-105.4 105.4L310.6 361.4z' />
                  </svg>
                </div>
              </div>
              <div className='pUMCB_Zaps'>
                <div className='pUMCB_ZapsInside'>
                  <div className='pUMCB_ZapsInsideAmount'>
                    <div className='inputLabelWrapperMain'>
                      {labelDescriptionMain}
                      <label className='form-label labelMain'>
                        Amount (Satoshis)
                      </label>
                      <input
                        className='inputMain'
                        type='text'
                        inputMode='numeric'
                        value={amount ? formatNumber(amount) : ''}
                        onChange={handleAmountChange}
                      />
                    </div>
                    <div className='pUMCB_ZapsInsideAmountOptions'>
                      <ZapPresets setAmount={setAmount} />
                    </div>
                  </div>
                  <div className='inputLabelWrapperMain'>
                    <label className='form-label labelMain'>
                      Message (optional)
                    </label>
                    <input
                      type='text'
                      className='inputMain'
                      value={message}
                      onChange={(e) => setMessage(e.target.value)}
                    />
                  </div>
                  <ZapButtons
                    disabled={!amount}
                    handleGenerateQRCode={handleGenerateQRCode}
                    handleSend={handleSend}
                  />
                  {paymentRequest && (
                    <ZapQR
                      paymentRequest={paymentRequest}
                      handleClose={handleQRClose}
                      handleQRExpiry={handleQRExpiry}
                      setTotalZapAmount={setTotalZapAmount}
                    />
                  )}
                  {lastNode}
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </>
  )
}