[flutter]一键将YAPI生成的api.json文件转为需要的Dart Model类的脚本

目的：

根据YAPI接口平台生成的api.json接口文件，将接口数据转化为model类，生成对应的接口值类型文件。

发现：

api.json文件导出：

YAPi是一个接口管理平台，登录账号打开项目后，在点击数据管理菜单，右侧导出按钮可以将接口数据全部导出在一份api.json文件中。

api.json文件分析:

res_body与res_body_other的json解码后格式示例 ：

dart文件模板

生成结果 

脚本源码： 

import 'dart:convert';
import 'dart:io';const SRC = "json_model/api.json"; //来源JSON 文件
const DIST = "lib/models/"; //输出model目录
const TEMPLATE = "json_model/template.txt"; //dart文件模板void run() {var list = json.decode(File(SRC).readAsStringSync());for (var apiClass in (list as List)) {apiClass["list"].forEach((api) {if (api["res_body"] != null) {var map = jsonDecode(api["res_body"]);processData(map, api["path"], "response");}if(api["method"]=="GET"){if (api["req_query"].length!=0) {processGetData(api["req_query"],api["path"]);}}else{if (api["req_body_other"] != null) {var map = jsonDecode(api["req_body_other"]);processData(map, api["path"], "query");}}});}debug("文件生成结束");
}String processData(Map<String, dynamic> map, String path, String form, [String? keyName]) {var template = File(TEMPLATE).readAsStringSync(); /* dart文件模板 */var tempPath = path.split('/');tempPath.removeAt(0);var filename = tempPath.join("_");if (map['type'] == 'array') {var type = processData(map["items"], path, form, keyName);if (type.startsWith('%')) {/* 数组内容为对象 */var className = type.substring(1); /* Person */return '%[]$className';} else {return 'List<$type>';}} else if (map["type"] == 'object') {var setImport = <String>[];StringBuffer setKey = StringBuffer();(map["properties"] as Map<String, dynamic>).forEach((key, v) {/* 注释 */setKey.write("///");setKey.writeln((v["description"] as String).replaceAll("\n", " "));setKey.write("  ");bool ifRequired = map["required"] != null && (map["required"] as List).contains(key);if (ifRequired) {setKey.write("late ");}if (v["type"] == 'array') {var vType = processData(v, path, form, key);if (vType.startsWith('%[]')) {vType = vType.substring(3); /* Peason */var fileName = changeFirstChar(vType, false);setImport.add('import "$fileName.dart"');setKey.write('List<$vType>');} else {setKey.write(vType);}} else if (v["type"] == 'object') {var type = processData(v, path, form, key);var className = type.substring(1);var filename = changeFirstChar(className, false);setImport.add('import "$filename.dart"');setKey.write(className);} else {setKey.write(getType(v["type"]));}if (!ifRequired) {setKey.write("?");}setKey.write(" ");setKey.write(key);setKey.writeln(";"); /* writeln换行 */setKey.write("  ");});if (keyName != null) {filename += "_$keyName";}filename += "_$form";var tempImport = setImport.join(";\r\n");tempImport += tempImport.isEmpty ? "" : ";";String className = filename[0].toUpperCase() + filename.substring(1);var dist = template.replaceAll("%name", filename);dist = dist.replaceAll("%Name", className);dist = dist.replaceFirst("%i", tempImport);dist = dist.replaceFirst("%key", setKey.toString());var newFile = File("$DIST$filename.dart");if (!newFile.existsSync()) {newFile.createSync();}newFile.writeAsStringSync(dist);return '%$className'; /* %Person */}return getType(map["type"]);
}String getType(String type) {// current = current.toLowerCase();switch (type) {case 'boolean':return "bool";case 'integer':return "num";case 'number':return "num";case 'string':return "String";default:return type;}
}processGetData(List list, String path){var template = File(TEMPLATE).readAsStringSync(); /* dart文件模板 */var tempPath = path.split('/');tempPath.removeAt(0);var filename = tempPath.join("_");filename+="_query";StringBuffer setKey = StringBuffer();for (var element in list) { setKey.write("///");setKey.writeln((element["desc"] as String).replaceAll("\n", " "));setKey.write("  ");if (element["required"]=="1") {setKey.write("late ");}setKey.write("String");if (element["required"]=="0") {setKey.write("?");}setKey.write(" ");setKey.write(element["name"]);setKey.writeln(";"); /* writeln换行 */setKey.write("  ");}String className = filename[0].toUpperCase() + filename.substring(1);var dist = template.replaceAll("%name", filename);dist = dist.replaceAll("%Name", className);dist = dist.replaceFirst("%i", "");dist = dist.replaceFirst("%key", setKey.toString());var newFile = File("$DIST$filename.dart");if (!newFile.existsSync()) {newFile.createSync();}newFile.writeAsStringSync(dist);
}String changeFirstChar(String str, [bool upper = true]) {return (upper ? str[0].toUpperCase() : str[0].toLowerCase()) + str.substring(1);
}/// 打印
void debug(String str) {DateTime now = DateTime.now();var value = now.toString();value += ": $str\n";File("json_model/debugLog.txt").writeAsBytesSync(const Utf8Encoder().convert(value), mode: FileMode.writeOnlyAppend);
}void main() {run();
}