data_analyze_platform/LIB/BACKEND/DBManager.py

'''
暂时采用http方式获取历史数据。

预留：后期若改用通过访问数据库的形式进行数据的获取，则本文件负责数据库的连接，sql指令的执行，数据获取等功能。
'''
__author__ = 'wlm'

from re import S
import time
import datetime
import os
import urllib.request
import time
import pandas as pd
import numpy as np
import json
import requests
import pdb


# import http.client
# http.client.HTTPConnection._http_vsn = 10
# http.client.HTTPConnection._http_vsn_str = 'HTTP/1.1'
class DBManager():

    def __init__(self, host='', port='', auth='', db='', username='', password=''):
        pass

    def __enter__(self):
        self.connect()
        return self

    def __exit__(self):
        self.close()

    def connect(self):
        conn_success_flag = 0
        while not conn_success_flag:
            try:
                pass # 连接数据库
            except Exception as e:
                conn_success_flag = 0
                time.sleep(5)
            else:
                conn_success_flag = 1
                pass # 连接成功， 获取cursor
    def close(self):
        try:
            pass # 断开数据库
        except Exception as e:
            print(e)
        else:
            print('数据库已断开连接')

    # 以下各个函数实现 通过http方式获取数据
    @staticmethod
    def _get_var_name(cellnum,Tempnum,Othernum):
        temp = []
        for i in range(cellnum):
            temp.append('单体电压'+str(i+1))
        for i in range(Tempnum):
            temp.append('单体温度'+str(i+1))
        for i in range(Othernum):
            temp.append('其他温度'+str(i+1))
        return temp

    @staticmethod
    def _download_json_data(url):
        '''
        返回json数据的生成器，一次一行
        '''

        i = 0
        while 1:
            try:
                r = requests.get(url, stream=True, timeout=100,  headers={'Connection':'close'})
                break
            except requests.exceptions.RequestException as e:
                if (i == 0):
                    print()
                print('\r' + 'Server Error, retry {}......'.format(str(i)), end=" ")
                time.sleep(5)
                i+=1
        # print(r.content)
        # pdb.set_trace()    
        for line in r.iter_lines():
            if line:
                yield json.loads(line)

    @staticmethod
    def _convert_to_bms(data, mode=0):
        CellU = []
        CellT = []
        OtherT = []
        CellU_Num = 0
        CellT_Num = 0
        OtherT_Num = 0
        CellU_Num = len(data['ffBatteryStatus']['cellVoltageList'])
        CellT_Num = len(data['ffBatteryStatus']['cellTempList'])
        try:
            OtherT_Num = len(data['ffBatteryStatus']['otherTempList'])
        except:
            OtherT_Num = 0
        for i in range(CellU_Num):
            CellU.append(data['ffBatteryStatus']['cellVoltageList'][i]*1000)
        for i in range(CellT_Num):
            CellU.append(data['ffBatteryStatus']['cellTempList'][i])
        for i in range(OtherT_Num):
            CellU.append(data['ffBatteryStatus']['otherTempList'][i])
        if mode == 0:
            data_len = 15
            
            data_block = np.array([data['info']['obdTime'],data['ffBatteryStatus']['rssi'],data['ffBatteryStatus']['errorLevel'],data['ffBatteryStatus']['errorCode']
                    ,data['ffBatteryStatus']['current'],data['ffBatteryStatus']['voltageInner'],data['ffBatteryStatus']['voltageOutter'],
                    data['ffBatteryStatus']['totalOutputState'],data['ffBatteryStatus']['lockedState'],
                    data['ffBatteryStatus']['chargeState'],data['ffBatteryStatus']['heatState'],data['ffBatteryStatus']['cellVoltageDiff']
                    ,data['ffBatteryStatus']['soc'],data['ffBatteryStatus']['soh'],data['ffBatteryStatus']['cellVolBalance']]).reshape(1,data_len)
        elif mode == 1:
            data_len = 7
            data_block = np.array([data['info']['obdTime'],data['ffBatteryStatus']['rssi']
            ,data['ffBatteryStatus']['current'],data['ffBatteryStatus']['voltageInner'],data['ffBatteryStatus']['chargeState']
            ,data['ffBatteryStatus']['soc'],data['ffBatteryStatus']['soh']]).reshape(1,data_len)
        data_block = np.append(data_block,CellU)
        data_block = np.append(data_block,CellT)
        data_block = np.append(data_block,OtherT)
        data_block = data_block.reshape(1,len(data_block))
        return data_block,CellU_Num,CellT_Num,OtherT_Num

    @staticmethod
    def _convert_to_dataframe_Gps(data, mode=0):
        if mode == 0:
            if data['info']['subType'] == 1:
                data_block = np.array([data['info']['obdTime'],data['ffGps']['locationType'], data['ffGps']['satellites'],
                                       data['ffGps']['latitude'],data['ffGps']['longitude'],data['ffGps']['speed'], 
                                       data['ffGps']['altitude'], data['ffGps']['direction']]).reshape(1,8)
                df = pd.DataFrame(
                    columns=['时间戳','定位类型', '卫星数','纬度','经度','速度[km/h]','海拔','航向'],data=data_block)
            elif data['info']['subType'] == 2:
                df = pd.DataFrame(
                    columns=['时间戳','定位类型', '卫星数','纬度','经度','速度[km/h]','海拔','航向'])
        if mode == 1:
                data_block = np.array([data['info']['obdTime'],data['ffGps']['latitude'],data['ffGps']['longitude']
                    ,data['ffGps']['speed'], data['ffGps']['isValid']]).reshape(1,5)
                df = pd.DataFrame(
                    columns=['时间戳','纬度','经度','速度[km/h]','有效位'],data=data_block)
        return df
    
    @staticmethod
    def _get_data(urls,type_name,mode=0):
        if type_name == 'bms':
            if mode == 0:
                name_const = ['时间戳','GSM信号','故障等级','故障代码','总电流[A]','总电压[V]', '外电压', '总输出状态', '上锁状态', '充电状态','加热状态',
                              '单体压差', 'SOC[%]','SOH[%]','单体均衡状态']
            elif mode == 1:
                name_const = ['时间戳','GSM信号','总电流[A]','总电压[V]','充电状态','SOC[%]','SOH[%]']
            i=0
            CellUNum = 0
            CellTNum = 0
            OtherTNumm = 0
            st = time.time()
            for line in DBManager._download_json_data(urls):
                et = time.time()
                if i==0:
                    data_blocks,CellUNum,CellTNum,OtherTNumm = DBManager._convert_to_bms(line, mode)
                    i+=1
                    continue
                try:
                    data_block,CellUNum,CellTNum,OtherTNumm = DBManager._convert_to_bms(line, mode)
                except:
                    continue
                data_blocks = np.concatenate((data_blocks,data_block),axis=0)
                # print('\r'+str(i),end=" ")
                # print(data_block)
                # print(urls)
                # print(time.time()-et)
                i+=1
            name_var = DBManager._get_var_name(CellUNum,CellTNum,OtherTNumm)
            name_const.extend(name_var)
            columns_name = name_const
            if i==0:
                data_blocks = []
            df_all = pd.DataFrame(columns=columns_name,data=data_blocks)
            df_all.loc[:,'时间戳'] = df_all.loc[:,'时间戳'].apply(lambda x:time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(int(x)/1000)))
            return df_all
        elif type_name =='gps':
            if mode == 0:
                df_all = pd.DataFrame(columns=['时间戳','定位类型', '卫星数','纬度','经度','速度[km/h]','海拔','航向'])
            elif mode == 1:
                df_all = pd.DataFrame(columns=['时间戳','纬度','经度','速度[km/h]','有效位'])
            for line in DBManager._download_json_data(urls):
                df_add = DBManager._convert_to_dataframe_Gps(line, mode)
                df_all = df_all.append(df_add,ignore_index=True)
            df_all.loc[:,'时间戳'] = df_all.loc[:,'时间戳'].apply(lambda x:time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(int(x)/1000)))
            return df_all

    def get_data(self, url='http://172.16.126.13/store/load?dataType={}&limit=0&sn={}', sn='', start_time='', end_time='', 
                 data_groups=['bms', 'gps']):
        '''
        获取指定 sn 和起止日期的bms和gps数据.
        添加了重试机制。

        --------------输入参数------------
        url：数据获取url， 可采用默认值
        sn: str, 电池sn号
        start_time: str, 开始时间
        end_time: str, 结束时间
        data_groups:  选择需要获取的数据组，可填入多个字符串（默认只获取bms和gps数据）
                    bms: bms数据
                    gps：gps数据
                    system：system数据
                    accum：accum数据
        

        --------------输出参数------------
        df_data: {'bms':dataframe, 'gps':dataframe, 'system':dataframe, ;accum':dataframe}
        '''
        
        if len(set(data_groups) - (set(data_groups) and set(['bms', 'gps', 'system', 'accum']))) > 0:
            raise Exception("data_groups 参数错误")
        
        # mode: 0：正常取数； 1：7255 取数
        if sn[0:2] == 'MG' or sn[0:2] == 'UD':
            mode = 1
        else:
            mode = 0
        bms_all_data = pd.DataFrame()
        gps_all_data = pd.DataFrame()
        system_all_data = pd.DataFrame()
        accum_all_data = pd.DataFrame()
        maxnum = (datetime.datetime.strptime(end_time, "%Y-%m-%d %H:%M:%S") - datetime.datetime.strptime(start_time, "%Y-%m-%d %H:%M:%S")).days +1
        print("### start to get data {} from {} to {}".format(sn, start_time, end_time))
        # 为避免chunkEncodingError错误，数据每天获取一次，然后将每天的数据合并，得到最终的数据
        for j in  range(int(maxnum)):
            timefrom = datetime.datetime.strptime(start_time, "%Y-%m-%d %H:%M:%S")+ datetime.timedelta(days=j)
            timeto = datetime.datetime.strptime(start_time, "%Y-%m-%d %H:%M:%S")+ datetime.timedelta(days=j+1)
            #滴滴的数据sub=0
            if timefrom.strftime('%Y-%m-%d %H:%M:%S') > end_time:
                break
            elif timeto.strftime('%Y-%m-%d %H:%M:%S') > end_time:
                timeto = datetime.datetime.strptime(end_time, '%Y-%m-%d %H:%M:%S')
            #print('{}_{}_----getting data----'.format(sn, timefrom))
            bms_data = pd.DataFrame()
            gps_data = pd.DataFrame()
            system_data = pd.DataFrame()
            accum_data = pd.DataFrame()
            while True:
                try:
                    print('\r' + "# get data from {} to {}.........".format(str(timefrom), str(timeto)), end=" ")
                    for data_group in data_groups:
                        if data_group == 'bms':
                            file_url = url.format(12, sn) + "&from="+timefrom.strftime('%Y-%m-%d %H:%M:%S')+"&to="+timeto.strftime('%Y-%m-%d %H:%M:%S')
                            bms_data = DBManager._get_data(file_url,'bms',mode)
                        if data_group == 'gps':
                            file_url = url.format(16, sn) + "&from="+timefrom.strftime('%Y-%m-%d %H:%M:%S')+"&to="+timeto.strftime('%Y-%m-%d %H:%M:%S')
                            gps_data = DBManager._get_data(file_url,'gps',mode)
                        if data_group == 'system':
                            file_url = url.format(13, sn) + "&from="+timefrom.strftime('%Y-%m-%d %H:%M:%S')+"&to="+timeto.strftime('%Y-%m-%d %H:%M:%S')
                            system_data = DBManager._get_data(file_url,'system',mode)
                        if data_group == 'accum':
                            file_url = url.format(23, sn) + "&from="+timefrom.strftime('%Y-%m-%d %H:%M:%S')+"&to="+timeto.strftime('%Y-%m-%d %H:%M:%S')
                            accum_data = DBManager._get_data(file_url,'accum',mode)
                except Exception as e:
                    if 'Connection broken' in str(e):
                        continue
                    else:
                        raise Exception
                else:
                    bms_all_data = pd.concat([bms_all_data, bms_data], ignore_index=True)
                    gps_all_data = pd.concat([gps_all_data, gps_data], ignore_index=True)
                    system_all_data = pd.concat([system_all_data, system_data], ignore_index=True)
                    accum_all_data = pd.concat([accum_all_data, accum_data], ignore_index=True)

                    break

        bms_all_data = bms_all_data.reset_index(drop=True)
        gps_all_data = gps_all_data.reset_index(drop=True)
        system_all_data = system_all_data.reset_index(drop=True)
        accum_all_data = accum_all_data.reset_index(drop=True)
        print('\nall data-getting done, bms_count is {}, gps_count is {}, system_count is {}, accum_count is {} \n'.format(
            str(len(bms_all_data)), str(len(gps_all_data)), str(len(system_all_data)), str(len(accum_all_data))))
        return {'bms':bms_all_data, 'gps':gps_all_data, 'system':system_all_data, 'accum':accum_all_data}