1.middleware

package com.gxhj.safecommunity.middleware.utils;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.gxhj.commontools.utils.StringUtils;
import com.gxhj.core.exception.BusinessException;
import com.gxhj.safecommunity.device.entity.DeviceInfo;
import com.hjkj.commandentity.base.CommandArgument;
import com.hjkj.commandentity.base.CommandNames;
import com.hjkj.commandentity.base.CommandResult;
import com.hjkj.commandentity.request.RequestCommand;
import com.hjkj.commandentity.response.ResponseCommand;

import java.io.*;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class MiddlewareUtil {

    /**
     * 得到HTTP请求body中的JSON字符串
     * @param inputStream
     * @return
     * @throws IOException
     */
    public static String getRequestBodyJson(InputStream inputStream) throws IOException {
        Reader input = new InputStreamReader(inputStream);
        Writer output = new StringWriter();
        char[] buffer = new char[1024];
        int n = 0;
        while(-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
        }
        return output.toString();
    }

    /**
     * json字符串转换成类
     */
    public static <T extends CommandResult> ResponseCommand<T> jsonFormatResponseCommand(String json, Class<T> clazz) {
        if (StringUtils.isEmpty(json)) {
            throw new BusinessException("json字符串转换成类失败--json字符串为空");
        }
        ObjectMapper objMapper = getSerialObjMapper();
        try {
            JavaType javaTypeOfVehicle = objMapper.getTypeFactory().constructParametricType(ResponseCommand.class, clazz);
            return objMapper.readValue(json, javaTypeOfVehicle);
        } catch (JsonProcessingException e) {
            throw new BusinessException("json转换类失败");
        }
    }

    /**
     * 类转换json字符串
     *
     * @param t
     * @return {}
     * @auther zhangJunPeng
     * @date 2020/7/11 0011 14:40
     */
    public static <T> String objectFormatJson(T t) {
        ObjectMapper objectMapper = new ObjectMapper();
        try {
            return objectMapper.writeValueAsString(t);
        } catch (JsonProcessingException e) {
            throw new BusinessException("类转换json失败");
        }
    }

    /**
     * 获得序列化后的objectMapper
     *
     * @auther zhangJunPeng
     * @date 2020/7/16 0016 16:29
     */
    public static ObjectMapper getSerialObjMapper() {
        // 设置ObjectMapper的反序列化
        ObjectMapper objMapper = new ObjectMapper();
        objMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objMapper.disable(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE);

        objMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        objMapper.setLocale(Locale.forLanguageTag("zh"));
        objMapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        objMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));

        JavaTimeModule javaTimeModule = new JavaTimeModule();
        // LocalDateTime序列化
        javaTimeModule.addSerializer(LocalDateTime.class, new JsonSerializer<LocalDateTime>() {
            @Override
            public void serialize(LocalDateTime dateTime, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
                jsonGenerator.writeString(dateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
            }
        });
        // LocalDate序列化
        javaTimeModule.addSerializer(LocalDate.class, new JsonSerializer<LocalDate>() {
            @Override
            public void serialize(LocalDate date, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
                jsonGenerator.writeString(date.format(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
            }
        });
        // LocalTime序列化
        javaTimeModule.addSerializer(LocalTime.class, new JsonSerializer<LocalTime>() {
            @Override
            public void serialize(LocalTime dateTime, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
                jsonGenerator.writeString(dateTime.format(DateTimeFormatter.ofPattern("HH:mm:ss")));
            }
        });

        // LocalDateTime反序列化
        javaTimeModule.addDeserializer(LocalDateTime.class, new JsonDeserializer<LocalDateTime>() {
            @Override
            public LocalDateTime deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
                return LocalDateTime.parse(jsonParser.getText(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
            }
        });
        // LocalDate反序列化
        javaTimeModule.addDeserializer(LocalDate.class, new JsonDeserializer<LocalDate>() {
            @Override
            public LocalDate deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
                return LocalDate.parse(jsonParser.getText(), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
            }
        });
        // LocalTime反序列化
        javaTimeModule.addDeserializer(LocalTime.class, new JsonDeserializer<LocalTime>() {
            @Override
            public LocalTime deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
                return LocalTime.parse(jsonParser.getText(), DateTimeFormatter.ofPattern("HH:mm:ss"));
            }
        });

        objMapper.registerModule(javaTimeModule);
        return objMapper;
    }

    /***
     * 将参数放入RequestCommand中
     */
    public static <T extends CommandArgument> RequestCommand<T> putParamInRequestCommand(DeviceInfo deviceInfo, CommandNames commandName, T commandArgument) {

        //指令信息
        RequestCommand<T> requestCommand = new RequestCommand<>();
        requestCommand.setCommandName(commandName);
        requestCommand.setCreatetime(new Date());

        //设备信息
        CommandArgument cmdArg = commandArgument;
        cmdArg.setIp(deviceInfo.getIpAddress());
        cmdArg.setSdkport(deviceInfo.getServicePort());
        cmdArg.setUsername(deviceInfo.getAccount());
        cmdArg.setPassword(deviceInfo.getPassword());
        cmdArg.setDeviceFactoryType(deviceInfo.getManufacturerCode().getValue());
//        cmdArg.setDeviceTypes(deviceInfo.getDeviceType());

        requestCommand.setCommandArg(commandArgument);

        return requestCommand;
    }
}