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uni_modules/nutui-uni/components/form/form.vue

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+<script setup lang="ts">
+import type { VNode } from 'vue'
+import { computed, defineComponent, reactive, watch } from 'vue'
+import { PREFIX } from '../_constants'
+import { useProvide } from '../_hooks'
+import { getMainClass, getPropByPath, isObject, isPromise } from '../_utils'
+import NutCellGroup from '../cellgroup/cellgroup.vue'
+import type { FormItemRule } from '../formitem/types'
+import { FORM_KEY, formEmits, formProps } from './form'
+import type { ErrorMessage, FormRule, FormRules } from './types'
+
+const props = defineProps(formProps)
+const emit = defineEmits(formEmits)
+defineExpose({ reset, submit, validate })
+const formErrorTip = computed(() => reactive<any>({}))
+
+const { internalChildren } = useProvide(
+  FORM_KEY,
+  'nut-form-item',
+)({ props, formErrorTip })
+
+const classes = computed(() => {
+  return getMainClass(props, componentName)
+})
+function clearErrorTips() {
+  Object.keys(formErrorTip.value).forEach((item) => {
+    formErrorTip.value[item] = ''
+  })
+}
+
+function reset() {
+  clearErrorTips()
+}
+
+watch(
+  () => props.modelValue,
+  () => {
+    clearErrorTips()
+  },
+  { immediate: true },
+)
+
+function findFormItem(vnodes: VNode[]) {
+  let task: FormRule[] = []
+  vnodes.forEach((vnode: VNode) => {
+    let type = vnode.type
+    type = (type as any).name || type
+    if (type === 'nut-form-item' || type?.toString().endsWith('form-item')) {
+      task.push({
+        prop: vnode.props?.prop,
+        rules: vnode.props?.rules || [],
+      })
+    }
+    else if (Array.isArray(vnode.children) && vnode.children?.length) {
+      task = task.concat(findFormItem(vnode.children as VNode[]))
+    }
+    else if (isObject(vnode.children) && Object.keys(vnode.children)) {
+      // 异步节点获取
+      if ((vnode.children as any)?.default) {
+        vnode.children = (vnode.children as any).default()
+        task = task.concat(findFormItem(vnode.children as VNode[]))
+      }
+    }
+    else if (Array.isArray(vnode)) {
+      task = task.concat(findFormItem(vnode as VNode[]))
+    }
+  })
+
+  return task
+}
+
+function tipMessage(errorMsg: ErrorMessage) {
+  if (errorMsg.message)
+    emit('validate', errorMsg)
+
+  formErrorTip.value[errorMsg.prop] = errorMsg.message
+}
+
+async function checkRule(item: FormRule): Promise<ErrorMessage | boolean> {
+  const { rules, prop } = item
+
+  const _Promise = (errorMsg: ErrorMessage): Promise<ErrorMessage> => {
+    return new Promise((resolve, reject) => {
+      try {
+        tipMessage(errorMsg)
+        resolve(errorMsg)
+      }
+      catch (error) {
+        reject(error)
+      }
+    })
+  }
+
+  if (!prop)
+    console.warn('[NutUI] <FormItem> 使用 rules 校验规则时 , 必须设置 prop 参数')
+
+  const value = getPropByPath(props.modelValue, prop || '')
+
+  // clear tips
+  tipMessage({ prop, message: '' })
+  const formRules: FormRules = props.rules || {}
+  const _rules = [...(formRules?.[prop] || []), ...rules]
+  while (_rules.length) {
+    const rule = _rules.shift() as FormItemRule
+    const { validator, ...ruleWithoutValidator } = rule
+    const { required, regex, message } = ruleWithoutValidator
+    const errorMsg = { prop, message }
+    if (required) {
+      if (Array.isArray(value)) {
+        if (!value.length)
+          return _Promise(errorMsg)
+      }
+      else if (!value && value !== 0) {
+        return _Promise(errorMsg)
+      }
+    }
+    if (regex && !regex.test(String(value)))
+      return _Promise(errorMsg)
+
+    if (validator) {
+      const result = validator(value, ruleWithoutValidator)
+      if (isPromise(result)) {
+        try {
+          const value = await result
+          if (value === false)
+            return _Promise(errorMsg)
+        }
+        catch (error) {
+          const validateErrorMsg = { prop, message: error as string }
+          return _Promise(validateErrorMsg)
+        }
+      }
+      else {
+        if (!result)
+          return _Promise(errorMsg)
+      }
+    }
+  }
+  return Promise.resolve(true)
+}
+
+/**
+ * 校验
+ * @param customProp 指定校验，用于用户自定义场景时触发，例如 blur、change 事件
+ */
+function validate(customProp = ''): Promise<{ valid: boolean, errors: ErrorMessage[] }> {
+  return new Promise((resolve, reject) => {
+    try {
+      const task = findFormItem(internalChildren?.map(child => child.vnode))
+
+      const errors = task.map((item) => {
+        if (customProp && customProp !== item.prop)
+          return Promise.resolve(true)
+
+        return checkRule(item)
+      })
+
+      Promise.all(errors).then((errorRes) => {
+        errorRes = errorRes.filter(item => item !== true)
+        const res = { valid: true, errors: [] }
+        if (errorRes.length) {
+          res.valid = false
+          res.errors = errorRes as any
+        }
+        resolve(res)
+      })
+    }
+    catch (error) {
+      reject(error)
+    }
+  })
+}
+function submit() {
+  validate()
+  return false
+}
+</script>
+
+<script lang="ts">
+const componentName = `${PREFIX}-form`
+
+export default defineComponent({
+  name: componentName,
+  options: {
+    virtualHost: true,
+    addGlobalClass: true,
+    styleIsolation: 'shared',
+  },
+})
+</script>
+
+<template>
+  <form
+    :class="classes"
+    :style="customStyle"
+    action="#"
+    @submit.prevent="() => false"
+  >
+    <NutCellGroup>
+      <slot />
+    </NutCellGroup>
+  </form>
+</template>
+
+<style lang="scss">
+@import './index';
+</style>