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1/*
2* Copyright (c) 2022 Shenzhen Kaihong Digital Industry Development Co., Ltd.
3* Licensed under the Apache License, Version 2.0 (the "License");
4* you may not use this file except in compliance with the License.
5* You may obtain a copy of the License at
6*
7* http://www.apache.org/licenses/LICENSE-2.0
8*
9* Unless required by applicable law or agreed to in writing, software
10* distributed under the License is distributed on an "AS IS" BASIS,
11* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12* See the License for the specific language governing permissions and
13* limitations under the License.
14*/
15const re = require("../tools/re");
16const { checkOutBody, print } = require("../tools/tool");
17const { FuncType } = require("../tools/common");
18const { NapiLog } = require("../tools/NapiLog");
19
20/**函数参数解析 */
21function analyzeParams(funcName, values) {
22    let result = []
23    let funcType = FuncType.DIRECT
24    let optionalParamCount = 0; // 可选参数的个数
25    while (values.length > 0) {
26        let v = checkOutBody(values, 0, ["", ","])
27        if (v == null)
28            v = values
29        values = values.substring(v.length, values.length)
30        let matchs = re.match("([a-zA-Z_0-9\\.]+)(\\?*): *([a-zA-Z<,>|_0-9\\[\\]\\(\\):='{}]+)", v)
31        if (matchs == null && (funcName == "on" || funcName == "off")) {
32            // on和off的第一个参数的类型可以是一串字符
33            matchs = re.match("([a-zA-Z_0-9\\.]+)(\\?*): *\"([a-zA-Z|_0-9\\[\\]\\(\\):='{}]+)\"", v)
34        }
35        if (matchs != null) {
36            let type = re.getReg(v, matchs.regs[3])
37            if (type.indexOf("Map") < 0) {
38                type = type.replace(/,/g, "")
39            }
40
41            let optionalFlag = re.getReg(v, matchs.regs[2]) == '?' ? true : false;
42            let checkParamOk = true;
43            if (optionalFlag) {
44                optionalParamCount++;
45            } else if (optionalParamCount > 0) {
46                // 可选参数之后不能再有必选参数，必选都是可选参数。
47                NapiLog.logError("Invalid parameter [%s] of function [%s],".format(v, funcName)
48                        + " the required parameter cannot follow an optional parameter.");
49                checkParamOk = false;
50            }
51            if (checkParamOk) {
52                result.push({ "name": re.getReg(v, matchs.regs[1]), "type": type , "optional": optionalFlag})
53                if (type.indexOf("AsyncCallback") >= 0)
54                    funcType = FuncType.ASYNC
55                if (funcType == FuncType.DIRECT && type.indexOf("Callback") >= 0 && type.indexOf("AsyncCallback") < 0)
56                    funcType = FuncType.SYNC
57            }
58        }
59        else {
60            NapiLog.logError("方法[%s]的参数列表[%s]解析失败。".format(funcName, v));
61            NapiLog.logError("Failed to analyse parameter [%s] of function [%s].".format(v, funcName));
62        }
63    }
64    return [result, funcType]
65}
66
67module.exports = {
68    analyzeParams
69}