dify/web/app/components/workflow/nodes/llm/default.ts

import type { Var } from '../../types'
import { BlockEnum, EditionType, VarType } from '../../types'
import { type NodeDefault, type PromptItem, PromptRole } from '../../types'
import { getNotExistVariablesByArray, getNotExistVariablesByText } from '../../utils/workflow'
import type { LLMNodeType } from './types'
import { ALL_CHAT_AVAILABLE_BLOCKS, ALL_COMPLETION_AVAILABLE_BLOCKS } from '@/app/components/workflow/blocks'

const i18nPrefix = 'workflow.errorMsg'

const nodeDefault: NodeDefault<LLMNodeType> = {
  defaultValue: {
    model: {
      provider: '',
      name: '',
      mode: 'chat',
      completion_params: {
        temperature: 0.7,
      },
    },
    prompt_template: [{
      role: PromptRole.system,
      text: '',
    }],
    context: {
      enabled: false,
      variable_selector: [],
    },
    vision: {
      enabled: false,
    },
  },
  getAvailablePrevNodes(isChatMode: boolean) {
    const nodes = isChatMode
      ? ALL_CHAT_AVAILABLE_BLOCKS
      : ALL_COMPLETION_AVAILABLE_BLOCKS.filter(type => type !== BlockEnum.End)
    return nodes
  },
  getAvailableNextNodes(isChatMode: boolean) {
    const nodes = isChatMode ? ALL_CHAT_AVAILABLE_BLOCKS : ALL_COMPLETION_AVAILABLE_BLOCKS
    return nodes
  },
  checkValid(payload: LLMNodeType, t: any) {
    let errorMessages = ''
    if (!errorMessages && !payload.model.provider)
      errorMessages = t(`${i18nPrefix}.fieldRequired`, { field: t(`${i18nPrefix}.fields.model`) })

    if (!errorMessages && !payload.memory) {
      const isChatModel = payload.model.mode === 'chat'
      const isPromptEmpty = isChatModel
        ? !(payload.prompt_template as PromptItem[]).some((t) => {
          if (t.edition_type === EditionType.jinja2)
            return t.jinja2_text !== ''

          return t.text !== ''
        })
        : ((payload.prompt_template as PromptItem).edition_type === EditionType.jinja2 ? (payload.prompt_template as PromptItem).jinja2_text === '' : (payload.prompt_template as PromptItem).text === '')
      if (isPromptEmpty)
        errorMessages = t(`${i18nPrefix}.fieldRequired`, { field: t('workflow.nodes.llm.prompt') })
    }

    if (!errorMessages && !!payload.memory) {
      const isChatModel = payload.model.mode === 'chat'
      // payload.memory.query_prompt_template not pass is default: {{#sys.query#}}
      if (isChatModel && !!payload.memory.query_prompt_template && !payload.memory.query_prompt_template.includes('{{#sys.query#}}'))
        errorMessages = t('workflow.nodes.llm.sysQueryInUser')
    }

    if (!errorMessages) {
      const isChatModel = payload.model.mode === 'chat'
      const isShowVars = (() => {
        if (isChatModel)
          return (payload.prompt_template as PromptItem[]).some(item => item.edition_type === EditionType.jinja2)
        return (payload.prompt_template as PromptItem).edition_type === EditionType.jinja2
      })()
      if (isShowVars && payload.prompt_config?.jinja2_variables) {
        payload.prompt_config?.jinja2_variables.forEach((i) => {
          if (!errorMessages && !i.variable)
            errorMessages = t(`${i18nPrefix}.fieldRequired`, { field: t(`${i18nPrefix}.fields.variable`) })
          if (!errorMessages && !i.value_selector.length)
            errorMessages = t(`${i18nPrefix}.fieldRequired`, { field: t(`${i18nPrefix}.fields.variableValue`) })
        })
      }
    }
    if (!errorMessages && payload.vision?.enabled && !payload.vision.configs?.variable_selector?.length)
      errorMessages = t(`${i18nPrefix}.fieldRequired`, { field: t(`${i18nPrefix}.fields.visionVariable`) })
    return {
      isValid: !errorMessages,
      errorMessage: errorMessages,
    }
  },
  checkVarValid(payload: LLMNodeType, varMap: Record<string, Var>, t: any) {
    const errorMessageArr = []
    const prompt_templates_warnings: string[] = []
    if (payload.context?.enabled && payload.context?.variable_selector?.length) {
      const context_variable_selector_warnings = getNotExistVariablesByArray([payload.context.variable_selector], varMap)
      if (context_variable_selector_warnings.length)
        errorMessageArr.push(`${t('workflow.nodes.llm.context')} ${t('workflow.common.referenceVar')}${context_variable_selector_warnings.join('、')}${t('workflow.common.noExist')}`)
    }
    const prompt_templates = Array.isArray(payload.prompt_template) ? payload.prompt_template : [payload.prompt_template] as PromptItem[]
    prompt_templates.forEach((v) => {
      prompt_templates_warnings.push(...getNotExistVariablesByText(v.text, { context: { variable: 'context', type: VarType.string }, ...varMap }))
    })
    if (prompt_templates_warnings.length)
      errorMessageArr.push(`${t('workflow.nodes.llm.prompt')} ${t('workflow.common.referenceVar')}${prompt_templates_warnings.join('、')}${t('workflow.common.noExist')}`)

    const memory_query_prompt_template_warnings = getNotExistVariablesByText(payload.memory?.query_prompt_template || '', varMap)
    if (memory_query_prompt_template_warnings.length)
      errorMessageArr.push(`${t('workflow.nodes.common.memories.title')}USER ${t('workflow.common.referenceVar')}${memory_query_prompt_template_warnings.join('、')}${t('workflow.common.noExist')}`)

    if (payload.vision?.enabled && payload.vision?.configs?.variable_selector?.length) {
      const vision_variable_selector_warnings = getNotExistVariablesByArray([payload.vision.configs.variable_selector], varMap)
      if (vision_variable_selector_warnings.length)
        errorMessageArr.push(`${t('workflow.nodes.llm.vision')} ${t('workflow.common.referenceVar')}${vision_variable_selector_warnings.join('、')}${t('workflow.common.noExist')}`)
    }

    return {
      isValid: true,
      warning_vars: [...prompt_templates_warnings, ...memory_query_prompt_template_warnings],
      errorMessage: errorMessageArr,
    }
  },
}

export default nodeDefault