songjiachao commented on code in PR #323:
URL: https://github.com/apache/dubbo-js/pull/323#discussion_r1035842850
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packages/dubbo-serialization/src/proto.ts:
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@@ -0,0 +1,64 @@
+import fs from 'fs'
+import path from 'path'
+import _ from 'lodash'
+import { loadSync, Root, Type } from 'protobufjs'
+
+let _proto: Root | undefined = undefined
+
+/**
+ * 加载所有的proto文件
+ * @param dir 文件路径
+ * @returns Root namespace
+ */
+function loadProto(dir: string) {
+ const files = fs.readdirSync(dir)
+ // todo 优化成flatMap
+ const protoFiles = files
+ .filter((fileName) => fileName.endsWith('.proto'))
+ .map((fileName) => path.join(dir, fileName))
+ _proto = loadSync(protoFiles)
+ return _proto
+}
+
+/**
+ * 根据typeName寻找proto
+ * @param typeName
+ * @returns Reflected message type
+ */
+function lookup(typeName: string): Type {
+ if (!_.isString(typeName)) {
+ throw new TypeError('typeName must be a string')
+ }
+ if (!_proto) {
Review Comment:
OK
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