From 44f06fa28971a7f7a78e3d9a9a961d4d505b07de Mon Sep 17 00:00:00 2001
From: maqiqian <1363964820@qq.com>
Date: Mon, 19 Sep 2022 19:25:06 +0800
Subject: [PATCH] feat(core): support interpolation expression

---
 packages/vue3-example/src/App.vue             |  4 +-
 .../vue3-schema-form/src/core/SchemaForm.tsx  | 77 +++++++++++--------
 packages/vue3-schema-form/src/types/basic.ts  |  2 +
 packages/vue3-schema-form/src/types/props.ts  |  5 ++
 packages/vue3-schema-form/src/types/schema.ts | 17 ++--
 packages/vue3-schema-form/src/utils/index.ts  |  1 +
 .../vue3-schema-form/src/utils/resolver.ts    | 76 ++++++++++++++++++
 .../vue3-schema-form/src/utils/validate.ts    | 13 ++++
 8 files changed, 151 insertions(+), 44 deletions(-)
 create mode 100644 packages/vue3-schema-form/src/utils/resolver.ts

diff --git a/packages/vue3-example/src/App.vue b/packages/vue3-example/src/App.vue
index 6bdfc5d..b837f42 100644
--- a/packages/vue3-example/src/App.vue
+++ b/packages/vue3-example/src/App.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref } from 'vue';
 import { Button } from 'vant';
-import SchemaForm, { FormRef } from '../../vue3-schema-form/src';
+import SchemaForm, { FormRef, Schema } from '../../vue3-schema-form/src';
 import Test from './widgets/Test.vue';
 
 const formRef = ref<FormRef>();
@@ -79,7 +79,7 @@ const schema = {
       },
     },
   },
-};
+} as unknown as Schema;
 </script>
 
 <template>
diff --git a/packages/vue3-schema-form/src/core/SchemaForm.tsx b/packages/vue3-schema-form/src/core/SchemaForm.tsx
index db033d7..067b464 100644
--- a/packages/vue3-schema-form/src/core/SchemaForm.tsx
+++ b/packages/vue3-schema-form/src/core/SchemaForm.tsx
@@ -1,11 +1,12 @@
-import { defineComponent, computed, provide, watch, unref, ref } from 'vue';
+import { defineComponent, computed, watch, unref, ref } from 'vue';
 import { useChildren } from '../hooks/useRelation';
 import { createNamespace } from '../utils';
 
-import { SFPropsKey, SFDataKey, SFRelationKey } from '../constants';
+import { SFRelationKey } from '../constants';
 import { schemaFormProps, ErrorMessage } from '../types';
 import { validateAll, validateSingle } from './validator';
-import { getFieldConfigs, handleRemoveHiddenData } from './handleField';
+import { handleRemoveHiddenData } from './handleField';
+import { createSchemaCore } from './createCore';
 import FieldItem from './Field';
 import './index.scss';
 
@@ -22,41 +23,51 @@ export default defineComponent({
   emits: ['update:modelValue'],
 
   setup: (props, { emit, expose }) => {
-    const fieldConfigList = computed(() => getFieldConfigs(props));
+    const schemaCore = computed(() => createSchemaCore(props));
+    const schemaRenderer = computed(() =>
+      schemaCore.value?.renderer({
+        validate,
+        validateFields,
+        getFormData,
+        setFormData,
+      })
+    );
     const errorFields = ref({});
     const { children, linkChildren } = useChildren(SFRelationKey);
+    const formData = computed({
+      get: () => unref(props.modelValue),
+      set: (value: unknown) => {
+        emit('update:modelValue', value);
+      },
+    });
 
     linkChildren({
       props: computed(() => props),
-      formData: computed({
-        get: () => unref(props.modelValue),
-        set: (value: unknown) => {
-          emit('update:modelValue', value);
-        },
-      }),
+      formData,
     });
 
-    provide(
-      SFPropsKey,
-      computed(() => props)
-    );
-    provide(
-      SFDataKey,
-      computed({
-        get: () => unref(props.modelValue),
-        set: (value: any) => {
-          emit('update:modelValue', value);
-        },
-      })
-    );
-
     const getFilteredFormData = () =>
-      handleRemoveHiddenData(unref(props.modelValue), fieldConfigList.value);
+      handleRemoveHiddenData(
+        unref(props.modelValue),
+        schemaRenderer.value?.map(({ name }) => name) ?? []
+      );
 
     /** 获取表单值，如果配置removeHiddenData 则过滤掉hidden字段 */
     const getFormData = () =>
       props.removeHiddenData ? getFilteredFormData() : unref(props.modelValue);
 
+    const setValueByName = (name: string, value: unknown) => {
+      if (formData) {
+        formData[name] = value;
+      }
+    };
+
+    const setFormData = (values: Partial<FormData>) => {
+      for (const [key, value] of Object.entries(values)) {
+        setValueByName(key, value);
+      }
+    };
+
     /** 视口滚动到指定字段 */
     const scrollToField = (
       name: string,
@@ -80,7 +91,7 @@ export default defineComponent({
     const validateField = (fieldName: string, scrollToError = true) => {
       const formData = getFilteredFormData();
       const fieldData = formData[fieldName];
-      const fieldSchema = props.schema.properties?.[fieldName];
+      const fieldSchema = schemaCore.value?.schema.properties?.[fieldName];
 
       if (fieldData && fieldSchema) {
         return validateSingle(fieldData, fieldSchema, fieldName).then((errors) => {
@@ -116,7 +127,7 @@ export default defineComponent({
     const validate = (scrollToError = true) =>
       validateAll({
         formData: getFilteredFormData(),
-        descriptor: props.schema.properties!,
+        descriptor: schemaCore.value?.schema.properties,
       }).then((errors) => {
         // scroll to error position
         if (scrollToError && errors.length) {
@@ -179,7 +190,7 @@ export default defineComponent({
       if (props.debug && process.env.NODE_ENV !== 'production') {
         console.group('Action');
         console.log('%cNext:', 'color: #47B04B; font-weight: 700;', value);
-        console.log('%cConfig:', 'color: #1E80FF; font-weight: 700;', fieldConfigList.value);
+        console.log('%cConfig:', 'color: #1E80FF; font-weight: 700;', schemaRenderer.value);
         console.groupEnd();
       }
     });
@@ -192,12 +203,12 @@ export default defineComponent({
 
     return () => (
       <div class={name}>
-        {fieldConfigList.value.map((config) => (
+        {schemaRenderer.value?.map((scoped) => (
           <FieldItem
-            name={config.name}
-            key={config.name}
-            addon={{ ...config, validate, validateFields, getFormData }}
-            errorMessage={errorFields.value[config.name] ?? ''}
+            name={scoped.name}
+            key={scoped.name}
+            addon={scoped}
+            errorMessage={errorFields.value[scoped.name] ?? ''}
           />
         ))}
       </div>
diff --git a/packages/vue3-schema-form/src/types/basic.ts b/packages/vue3-schema-form/src/types/basic.ts
index 73c71f3..65f6eb7 100644
--- a/packages/vue3-schema-form/src/types/basic.ts
+++ b/packages/vue3-schema-form/src/types/basic.ts
@@ -9,3 +9,5 @@ export type ErrorMessage = {
   name: string;
   error: string[];
 };
+
+export type Deps = Record<string, any>;
diff --git a/packages/vue3-schema-form/src/types/props.ts b/packages/vue3-schema-form/src/types/props.ts
index 4109701..ebf83e6 100644
--- a/packages/vue3-schema-form/src/types/props.ts
+++ b/packages/vue3-schema-form/src/types/props.ts
@@ -17,6 +17,11 @@ export const schemaFormProps = {
     type: Object as PropType<Widgets>,
     default: () => ({}),
   },
+  /** 依赖的外部状态，用于插值表达式中的 $deps */
+  deps: {
+    type: Object,
+    default: () => ({}),
+  },
   /** 只读模式 */
   readonly: Boolean,
   /** 禁用模式 */
diff --git a/packages/vue3-schema-form/src/types/schema.ts b/packages/vue3-schema-form/src/types/schema.ts
index e52ec4f..a9bf74e 100644
--- a/packages/vue3-schema-form/src/types/schema.ts
+++ b/packages/vue3-schema-form/src/types/schema.ts
@@ -1,26 +1,21 @@
 import { RuleItem } from 'async-validator';
-import { FormData } from '.';
 
 export type ValueType = 'string' | 'object' | 'array' | 'number' | 'boolean' | 'date' | string;
 
-export type PayloadBoolean = boolean | ((data: FormData) => boolean);
-
-export type PayloadString = string | ((data: FormData) => string);
-
 export interface SchemaBase {
   type: ValueType;
   title: string;
   /** 是否必填，支持函数表达式 (formData)=> boolean */
-  required: PayloadBoolean;
+  required: boolean;
   placeholder: string;
   /** 改变字段绑定值 用户并不希望纯展示的字段也出现在表单中，此时，使用 bind: false 可避免字段在提交时出现 */
   // bind: false | string | string[];
   /** 是否禁用，支持函数表达式 (formData)=> boolean */
-  disabled: PayloadBoolean;
+  disabled: boolean;
   /** 是否只读，支持函数表达式 (formData)=> boolean */
-  readonly: PayloadBoolean;
+  readonly: boolean;
   /** 是否隐藏，隐藏的字段不会在 formData 里透出，支持函数表达式 (formData)=> boolean */
-  hidden: PayloadBoolean;
+  hidden: boolean;
   /** Label 与 Field 的展示关系，row 表示并排展示，column 表示两排展示 */
   displayType: 'row' | 'column' | string;
   /** label宽度 ！暂时不支持，如果有场景需要，可以考虑支持 */
@@ -40,4 +35,8 @@ export interface SchemaBase {
   border: boolean;
 }
 
+export type SchemaSegments<T = SchemaBase> = {
+  [P in keyof T]?: T[P] extends boolean | number ? T[P] | string : T[P];
+};
+
 export type Schema = Partial<SchemaBase>;
diff --git a/packages/vue3-schema-form/src/utils/index.ts b/packages/vue3-schema-form/src/utils/index.ts
index 14eb305..e237f87 100644
--- a/packages/vue3-schema-form/src/utils/index.ts
+++ b/packages/vue3-schema-form/src/utils/index.ts
@@ -3,3 +3,4 @@ export * from './validate';
 export * from './basic';
 export * from './crate';
 export * from './widget';
+export * from './resolver';
diff --git a/packages/vue3-schema-form/src/utils/resolver.ts b/packages/vue3-schema-form/src/utils/resolver.ts
new file mode 100644
index 0000000..d819f95
--- /dev/null
+++ b/packages/vue3-schema-form/src/utils/resolver.ts
@@ -0,0 +1,76 @@
+import { FormData, Deps, Schema } from '../types';
+import { isJsonSchema, isSegment, isObject } from './validate';
+
+/* eslint-disable no-new-func */
+export const safeEval = (code: string) => {
+  return Function(`"use strict"; ${code}`)();
+};
+
+/**
+ * 解析表达式计算结果
+ */
+export const evaluateSegment = (
+  segment: string,
+  selfValue: unknown,
+  formData: FormData,
+  deps: Deps
+) => {
+  try {
+    return safeEval(`
+      const $selfValue =${JSON.stringify(selfValue)};
+      const $values = ${JSON.stringify(formData)};
+      const $deps = ${JSON.stringify(deps)};
+      return (${segment})
+    `);
+  } catch (error) {
+    console.error(error, 'expression:', segment, 'formData:', formData);
+    return null;
+  }
+};
+
+export const resolvePropertiesSegment = (
+  properties: Record<string, any>,
+  formData: FormData,
+  deps: Deps
+): Record<string, any> => {
+  const resolvedProperties = {};
+
+  Object.keys(properties).forEach((key) => {
+    const val = properties[key];
+    if (Array.isArray(val)) {
+      resolvedProperties[key] = val;
+    } else if (isObject(val)) {
+      resolvedProperties[key] = resolvePropertiesSegment(val, formData, deps);
+    } else if (isSegment(val)) {
+      resolvedProperties[key] = evaluateSegment(val.slice(2, -2), formData[key], formData, deps);
+    } else {
+      resolvedProperties[key] = val;
+    }
+  });
+
+  return resolvedProperties;
+};
+
+export const resolveSchemaWithSegments = (
+  schema: Schema,
+  formData: FormData,
+  deps: Deps
+): Schema => {
+  if (!isJsonSchema(schema)) {
+    return schema;
+  }
+
+  const { properties = {}, ...rest } = schema;
+
+  const resolvedProperties = Object.fromEntries(
+    Object.entries(properties).map(([field, property]) => [
+      field,
+      resolvePropertiesSegment(property, formData, deps),
+    ])
+  );
+
+  return {
+    ...rest,
+    properties: resolvedProperties,
+  };
+};
diff --git a/packages/vue3-schema-form/src/utils/validate.ts b/packages/vue3-schema-form/src/utils/validate.ts
index d740ea6..e561a8e 100644
--- a/packages/vue3-schema-form/src/utils/validate.ts
+++ b/packages/vue3-schema-form/src/utils/validate.ts
@@ -1,4 +1,5 @@
 import { Numeric } from './basic';
+import { Schema } from '../types';
 
 export const isDef = <T>(val: T): val is NonNullable<T> => val !== undefined && val !== null;
 
@@ -32,6 +33,18 @@ export const isEmptyValue = (value: unknown) => {
   return !value;
 };
 
+export const isJsonSchema = (schema: Record<string, unknown>): schema is Schema =>
+  schema.properties !== undefined && schema.type === 'object';
+
+export const isSegment = (segment: string): segment is string => {
+  const pattern = /^{{(.+)}}$/;
+  if (typeof segment === 'string' && pattern.test(segment)) {
+    return true;
+  }
+
+  return false;
+};
+
 export const isJSON = (str: string) => {
   try {
     if (typeof JSON.parse(str) === 'object') {