dify/web/app/components/base/features/feature-panel/opening-statement/index.tsx

/* eslint-disable multiline-ternary */
'use client'
import type { FC } from 'react'
import React, { useEffect, useRef, useState } from 'react'
import produce from 'immer'
import {
  RiAddLine,
  RiDeleteBinLine,
} from '@remixicon/react'
import { useTranslation } from 'react-i18next'
import { useBoolean } from 'ahooks'
import { ReactSortable } from 'react-sortablejs'
import {
  useFeatures,
  useFeaturesStore,
} from '../../hooks'
import type { OnFeaturesChange } from '../../types'
import cn from '@/utils/classnames'
import Panel from '@/app/components/app/configuration/base/feature-panel'
import Button from '@/app/components/base/button'
import OperationBtn from '@/app/components/app/configuration/base/operation-btn'
import { getInputKeys } from '@/app/components/base/block-input'
import ConfirmAddVar from '@/app/components/app/configuration/config-prompt/confirm-add-var'
import { getNewVar } from '@/utils/var'
import { varHighlightHTML } from '@/app/components/app/configuration/base/var-highlight'
import type { PromptVariable } from '@/models/debug'

const MAX_QUESTION_NUM = 5

export type OpeningStatementProps = {
  onChange?: OnFeaturesChange
  readonly?: boolean
  promptVariables?: PromptVariable[]
  onAutoAddPromptVariable: (variable: PromptVariable[]) => void
}

// regex to match the {{}} and replace it with a span
const regex = /\{\{([^}]+)\}\}/g

const OpeningStatement: FC<OpeningStatementProps> = ({
  onChange,
  readonly,
  promptVariables = [],
  onAutoAddPromptVariable,
}) => {
  const { t } = useTranslation()
  const featureStore = useFeaturesStore()
  const openingStatement = useFeatures(s => s.features.opening)
  const value = openingStatement?.opening_statement || ''
  const suggestedQuestions = openingStatement?.suggested_questions || []
  const [notIncludeKeys, setNotIncludeKeys] = useState<string[]>([])

  const hasValue = !!(value || '').trim()
  const inputRef = useRef<HTMLTextAreaElement>(null)

  const [isFocus, { setTrue: didSetFocus, setFalse: setBlur }] = useBoolean(false)

  const setFocus = () => {
    didSetFocus()
    setTimeout(() => {
      const input = inputRef.current
      if (input) {
        input.focus()
        input.setSelectionRange(input.value.length, input.value.length)
      }
    }, 0)
  }

  const [tempValue, setTempValue] = useState(value)
  useEffect(() => {
    setTempValue(value || '')
  }, [value])

  const [tempSuggestedQuestions, setTempSuggestedQuestions] = useState(suggestedQuestions || [])
  const notEmptyQuestions = tempSuggestedQuestions.filter(question => !!question && question.trim())
  const coloredContent = (tempValue || '')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(regex, varHighlightHTML({ name: '$1' })) // `<span class="${highLightClassName}">{{$1}}</span>`
    .replace(/\n/g, '<br />')

  const handleEdit = () => {
    if (readonly)
      return
    setFocus()
  }

  const [isShowConfirmAddVar, { setTrue: showConfirmAddVar, setFalse: hideConfirmAddVar }] = useBoolean(false)

  const handleCancel = () => {
    setBlur()
    setTempValue(value)
    setTempSuggestedQuestions(suggestedQuestions)
  }

  const handleConfirm = () => {
    const keys = getInputKeys(tempValue)
    const promptKeys = promptVariables.map(item => item.key)
    let notIncludeKeys: string[] = []

    if (promptKeys.length === 0) {
      if (keys.length > 0)
        notIncludeKeys = keys
    }
    else {
      notIncludeKeys = keys.filter(key => !promptKeys.includes(key))
    }

    if (notIncludeKeys.length > 0) {
      setNotIncludeKeys(notIncludeKeys)
      showConfirmAddVar()
      return
    }
    setBlur()
    const { getState } = featureStore!
    const {
      features,
      setFeatures,
    } = getState()

    const newFeatures = produce(features, (draft) => {
      if (draft.opening) {
        draft.opening.opening_statement = tempValue
        draft.opening.suggested_questions = tempSuggestedQuestions
      }
    })
    setFeatures(newFeatures)

    if (onChange)
      onChange(newFeatures)
  }

  const cancelAutoAddVar = () => {
    const { getState } = featureStore!
    const {
      features,
      setFeatures,
    } = getState()

    const newFeatures = produce(features, (draft) => {
      if (draft.opening)
        draft.opening.opening_statement = tempValue
    })
    setFeatures(newFeatures)

    if (onChange)
      onChange(newFeatures)
    hideConfirmAddVar()
    setBlur()
  }

  const autoAddVar = () => {
    const { getState } = featureStore!
    const {
      features,
      setFeatures,
    } = getState()

    const newFeatures = produce(features, (draft) => {
      if (draft.opening)
        draft.opening.opening_statement = tempValue
    })
    setFeatures(newFeatures)
    if (onChange)
      onChange(newFeatures)
    onAutoAddPromptVariable([...notIncludeKeys.map(key => getNewVar(key, 'string'))])
    hideConfirmAddVar()
    setBlur()
  }

  const headerRight = !readonly ? (
    isFocus ? (
      <div className='flex items-center space-x-1'>
        <Button
          variant='ghost'
          size='small'
          onClick={handleCancel}
        >
          {t('common.operation.cancel')}
        </Button>
        <Button size='small' onClick={handleConfirm} variant="primary">{t('common.operation.save')}</Button>
      </div>
    ) : (
      <OperationBtn type='edit' actionName={hasValue ? '' : t('appDebug.openingStatement.writeOpener') as string} onClick={handleEdit} />
    )
  ) : null

  const renderQuestions = () => {
    return isFocus ? (
      <div>
        <div className='flex items-center py-2'>
          <div className='shrink-0 flex space-x-0.5 leading-[18px] text-xs font-medium text-gray-500'>
            <div className='uppercase'>{t('appDebug.openingStatement.openingQuestion')}</div>
            <div>·</div>
            <div>{tempSuggestedQuestions.length}/{MAX_QUESTION_NUM}</div>
          </div>
          <div className='ml-3 grow w-0 h-px bg-[#243, 244, 246]'></div>
        </div>
        <ReactSortable
          className="space-y-1"
          list={tempSuggestedQuestions.map((name, index) => {
            return {
              id: index,
              name,
            }
          })}
          setList={list => setTempSuggestedQuestions(list.map(item => item.name))}
          handle='.handle'
          ghostClass="opacity-50"
          animation={150}
        >
          {tempSuggestedQuestions.map((question, index) => {
            return (
              <div className='group relative rounded-lg border border-gray-200 flex items-center pl-2.5 hover:border-gray-300 hover:bg-white' key={index}>
                <div className='handle flex items-center justify-center w-4 h-4 cursor-grab'>
                  <svg width="6" height="10" viewBox="0 0 6 10" fill="none" xmlns="http://www.w3.org/2000/svg">
                    <path fillRule="evenodd" clipRule="evenodd" d="M1 2C1.55228 2 2 1.55228 2 1C2 0.447715 1.55228 0 1 0C0.447715 0 0 0.447715 0 1C0 1.55228 0.447715 2 1 2ZM1 6C1.55228 6 2 5.55228 2 5C2 4.44772 1.55228 4 1 4C0.447715 4 0 4.44772 0 5C0 5.55228 0.447715 6 1 6ZM6 1C6 1.55228 5.55228 2 5 2C4.44772 2 4 1.55228 4 1C4 0.447715 4.44772 0 5 0C5.55228 0 6 0.447715 6 1ZM5 6C5.55228 6 6 5.55228 6 5C6 4.44772 5.55228 4 5 4C4.44772 4 4 4.44772 4 5C4 5.55228 4.44772 6 5 6ZM2 9C2 9.55229 1.55228 10 1 10C0.447715 10 0 9.55229 0 9C0 8.44771 0.447715 8 1 8C1.55228 8 2 8.44771 2 9ZM5 10C5.55228 10 6 9.55229 6 9C6 8.44771 5.55228 8 5 8C4.44772 8 4 8.44771 4 9C4 9.55229 4.44772 10 5 10Z" fill="#98A2B3" />
                  </svg>
                </div>
                <input
                  type="input"
                  value={question || ''}
                  onChange={(e) => {
                    const value = e.target.value
                    setTempSuggestedQuestions(tempSuggestedQuestions.map((item, i) => {
                      if (index === i)
                        return value

                      return item
                    }))
                  }}
                  className={'w-full overflow-x-auto pl-1.5 pr-8 text-sm leading-9 text-gray-900 border-0 grow h-9 bg-transparent focus:outline-none cursor-pointer rounded-lg'}
                />

                <div
                  className='block absolute top-1/2 translate-y-[-50%] right-1.5 p-1 rounded-md cursor-pointer hover:bg-[#FEE4E2] hover:text-[#D92D20]'
                  onClick={() => {
                    setTempSuggestedQuestions(tempSuggestedQuestions.filter((_, i) => index !== i))
                  }}
                >
                  <RiDeleteBinLine className='w-3.5 h-3.5' />
                </div>
              </div>
            )
          })}</ReactSortable>
        {tempSuggestedQuestions.length < MAX_QUESTION_NUM && (
          <div
            onClick={() => { setTempSuggestedQuestions([...tempSuggestedQuestions, '']) }}
            className='mt-1 flex items-center h-9 px-3 gap-2 rounded-lg cursor-pointer text-gray-400  bg-gray-100 hover:bg-gray-200'>
            <RiAddLine className='w-4 h-4' />
            <div className='text-gray-500 text-[13px]'>{t('appDebug.variableConig.addOption')}</div>
          </div>
        )}
      </div>
    ) : (
      <div className='mt-1.5 flex flex-wrap'>
        {notEmptyQuestions.map((question, index) => {
          return (
            <div key={index} className='mt-1 mr-1 max-w-full truncate last:mr-0 shrink-0 leading-8 items-center px-2.5 rounded-lg border border-gray-200 shadow-xs bg-white text-[13px] font-normal text-gray-900 cursor-pointer'>
              {question}
            </div>
          )
        })}
      </div>
    )
  }

  return (
    <Panel
      className={cn(isShowConfirmAddVar && 'h-[220px]', 'relative !bg-gray-25')}
      title={t('appDebug.openingStatement.title')}
      headerIcon={
        <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
          <path fillRule="evenodd" clipRule="evenodd" d="M8.33353 1.33301C4.83572 1.33301 2.00019 4.16854 2.00019 7.66634C2.00019 8.37301 2.11619 9.05395 2.3307 9.69036C2.36843 9.80229 2.39063 9.86853 2.40507 9.91738L2.40979 9.93383L2.40729 9.93903C2.39015 9.97437 2.36469 10.0218 2.31705 10.11L1.2158 12.1484C1.14755 12.2746 1.07633 12.4064 1.02735 12.5209C0.978668 12.6348 0.899813 12.8437 0.938613 13.0914C0.984094 13.3817 1.15495 13.6373 1.40581 13.7903C1.61981 13.9208 1.843 13.9279 1.96683 13.9264C2.09141 13.925 2.24036 13.9095 2.38314 13.8947L5.81978 13.5395C5.87482 13.5338 5.9036 13.5309 5.92468 13.5292L5.92739 13.529L5.93564 13.532C5.96154 13.5413 5.99666 13.5548 6.0573 13.5781C6.76459 13.8506 7.53244 13.9997 8.33353 13.9997C11.8313 13.9997 14.6669 11.1641 14.6669 7.66634C14.6669 4.16854 11.8313 1.33301 8.33353 1.33301ZM5.9799 5.72116C6.73142 5.08698 7.73164 5.27327 8.33144 5.96584C8.93125 5.27327 9.91854 5.09365 10.683 5.72116C11.4474 6.34867 11.5403 7.41567 10.9501 8.16572C10.5845 8.6304 9.6668 9.47911 9.02142 10.0576C8.78435 10.2702 8.66582 10.3764 8.52357 10.4192C8.40154 10.456 8.26134 10.456 8.13931 10.4192C7.99706 10.3764 7.87853 10.2702 7.64147 10.0576C6.99609 9.47911 6.07839 8.6304 5.71276 8.16572C5.12259 7.41567 5.22839 6.35534 5.9799 5.72116Z" fill="#E74694" />
        </svg>
      }
      headerRight={headerRight}
      hasHeaderBottomBorder={!hasValue}
      isFocus={isFocus}
    >
      <div className='text-gray-700 text-sm'>
        {(hasValue || (!hasValue && isFocus)) ? (
          <>
            {isFocus
              ? (
                <div>
                  <textarea
                    ref={inputRef}
                    value={tempValue}
                    rows={3}
                    onChange={e => setTempValue(e.target.value)}
                    className="w-full px-0 text-sm  border-0 bg-transparent focus:outline-none "
                    placeholder={t('appDebug.openingStatement.placeholder') as string}
                  >
                  </textarea>
                </div>
              )
              : (
                <div dangerouslySetInnerHTML={{
                  __html: coloredContent,
                }}></div>
              )}
            {renderQuestions()}
          </>) : (
          <div className='pt-2 pb-1 text-xs text-gray-500'>{t('appDebug.openingStatement.noDataPlaceHolder')}</div>
        )}

        {isShowConfirmAddVar && (
          <ConfirmAddVar
            varNameArr={notIncludeKeys}
            onConfrim={autoAddVar}
            onCancel={cancelAutoAddVar}
            onHide={hideConfirmAddVar}
          />
        )}

      </div>
    </Panel>
  )
}
export default React.memo(OpeningStatement)