CMVR-BID/src/views/flow/components/params/EndParams.vue

<!-- End node output contract and value references. -->
<template>
  <div class="end-params">
    <div class="section-heading">
      <div>
        <div class="section-title">流程输出</div>
        <div class="section-note">输出值来自开始参数或前面节点的输出。</div>
      </div>
      <el-button type="primary" plain :icon="Plus" @click="addOutput">添加输出</el-button>
    </div>

    <el-empty v-if="!outputs.length" description="当前流程没有输出" :image-size="72" />
    <div v-for="(item, index) in outputs" :key="item.key" class="output-row">
      <el-form-item label="输出名称" required>
        <el-input v-model="item.name" maxlength="40" placeholder="例如：result" />
      </el-form-item>
      <el-form-item label="引用来源" required>
        <el-cascader
          v-model="item.quote"
          :options="quoteOptions"
          :props="{ checkStrictly: true }"
          placeholder="选择开始参数或节点输出"
          style="width: 100%"
          @visible-change="refreshQuoteOptions"
          @change="(value) => changeQuote(item, value)"
        />
      </el-form-item>
      <div class="output-row__meta">
        <el-tag effect="plain" type="info">{{ item.valueType || '自动识别' }}</el-tag>
        <el-input v-model="item.desc" placeholder="输出说明（可选）" />
        <el-button circle :icon="Delete" aria-label="删除输出" @click="outputs.splice(index, 1)" />
      </div>
    </div>
  </div>
</template>

<script setup>
import { onMounted, ref } from 'vue'
import { Delete, Plus } from '@element-plus/icons-vue'
import { ElMessage } from 'element-plus'
import { getUpstreamInput } from '@/utils/flow'

const props = defineProps({ data: Object })
const emit = defineEmits(['save-success', 'save-error'])
const outputs = ref([])
const quoteOptions = ref([])

const clone = (value) => JSON.parse(JSON.stringify(value ?? null))
const key = () => `output_${Date.now()}_${Math.random().toString(16).slice(2)}`

// 结束节点的输出只能来自已经执行过的开始参数或上游节点输出，面板展开时实时刷新引用树。
const refreshQuoteOptions = (visible = true) => {
  if (visible) quoteOptions.value = getUpstreamInput(props.data.id) || []
}

/**
 * 根据级联引用路径找到源字段定义，用于继承类型、子字段和默认说明。
 * 路径格式为 [节点ID, input/output, 字段名, 子字段名...]。
 */
const findDefinition = (quote) => {
  if (!Array.isArray(quote) || quote.length < 3) return null
  const graph = globalThis.lf.getGraphData()
  const source = graph.nodes.find((node) => node.id === quote[0])
  let definitions = quote[1] === 'input'
    ? [...(source?.properties?.inputParams || []), ...(source?.properties?.nodeParams || [])]
    : source?.properties?.outputParams || []
  let definition = null
  quote.slice(2).forEach((name) => {
    definition = definitions.find((item) => item.name === name)
    definitions = definition?.children || []
  })
  return definition
}

/**
 * 用户切换引用来源后同步输出契约的类型和层级结构。
 * 未手动填写名称/说明时，优先继承被引用字段的元信息。
 */
const changeQuote = (item, value) => {
  item.quoteType = value?.[1] || ''
  const definition = findDefinition(value)
  if (!definition) return
  item.valueType = definition.type || 'string'
  item.children = clone(definition.children || [])
  if (!item.name) item.name = definition.name
  if (!item.desc) item.desc = definition.desc || ''
}

const addOutput = () => outputs.value.push({
  key: key(),
  name: '',
  valueType: 'string',
  quote: [],
  quoteType: '',
  desc: '',
  children: [],
})

const init = () => {
  const paramsByName = new Map((props.data.properties?.nodeParams || []).map((item) => [item.name, item]))
  outputs.value = (props.data.properties?.outputParams || []).map((output) => {
    const param = paramsByName.get(output.name) || {}
    return {
      key: key(),
      name: output.name || '',
      valueType: output.type || 'string',
      quote: Array.isArray(param.quote) ? [...param.quote] : [],
      quoteType: param.quoteType || param.quote?.[1] || '',
      desc: output.desc || '',
      children: clone(output.children || []),
    }
  })
  refreshQuoteOptions()
}

/**
 * 校验流程输出契约并写回结束节点。
 * nodeParams 保存运行时取值引用，outputParams 保存对外暴露的输出字段说明。
 */
const validateAndSave = () => {
  const names = outputs.value.map((item) => item.name.trim())
  if (names.some((name) => !name)) {
    ElMessage.warning('请填写流程输出名称')
    emit('save-error')
    return
  }
  if (new Set(names).size !== names.length) {
    ElMessage.warning('流程输出名称不能重复')
    emit('save-error')
    return
  }
  if (outputs.value.some((item) => !Array.isArray(item.quote) || item.quote.length < 3)) {
    ElMessage.warning('每个流程输出都必须选择引用来源')
    emit('save-error')
    return
  }
  const nodeParams = outputs.value.map((item) => ({
    name: item.name.trim(),
    type: 'quote',
    input: '',
    quote: [...item.quote],
    quoteType: item.quoteType || item.quote[1],
    required: true,
  }))
  const outputParams = outputs.value.map((item) => ({
    name: item.name.trim(),
    type: item.valueType || 'string',
    desc: item.desc || '',
    children: clone(item.children || []),
  }))
  globalThis.lf.setProperties(props.data.id, {
    ...props.data.properties,
    nodeParams,
    outputParams,
    outputType: 'json',
  })
  emit('save-success')
}

onMounted(init)
defineExpose({ validateAndSave })
</script>

<style scoped lang="scss">
.end-params { padding-top: 14px; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.section-title { color: #1f2937; font-size: 14px; font-weight: 650; }
.section-note { margin-top: 4px; color: #7a8494; font-size: 12px; }
.output-row { margin-bottom: 12px; padding: 14px; border: 1px solid #e4e8ef; border-radius: 6px; background: #fff; }
.output-row__meta { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 10px; }
</style>