doctor_app_flutter/lib/util/helpers.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

import '../config/size_config.dart';
import '../util/dr_app_toast_msg.dart';

import 'package:connectivity/connectivity.dart';

DrAppToastMsg toastMsg = DrAppToastMsg();

/* 
 *@author: Elham Rababah 
 *@Date:12/4/2020  
 *@param: 
 *@return:
 *@desc:   This class will contian some Function will help developer
 */
class Helpers {
  int cupertinoPickerIndex = 0;
/* 
 *@author: Elham Rababah 
 *@Date:12/4/2020  
 *@param: context, items, decKey, onSelectFun
 *@return: Container Widget
 *@desc:   showCupertinoPicker its a general function to show cupertino picker
 */
  showCupertinoPicker(context, items, decKey, onSelectFun) {
    showModalBottomSheet(
        isDismissible: false,
        context: context,
        builder: (BuildContext builder) {
          return Container(
            // height: 500,
            height: SizeConfig.realScreenHeight * 0.4,
            color: Color(0xfff7f7f7),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.end,
              children: <Widget>[
                Container(
                  color: Color(0xfff7f7f7),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      CupertinoButton(
                        child: Text('Cancel'.toUpperCase(), style: textStyle(context)),
                        onPressed: () {
                          Navigator.pop(context);
                        },
                        // padding: const EdgeInsets.symmetric(
                        //   horizontal: 16.0,
                        //   vertical: 5.0,
                        // ),
                      ),
                      CupertinoButton(
                        child: Text(
                          'Done'.toUpperCase(),
                          style: textStyle(context),
                        ),
                        onPressed: () {
                          Navigator.pop(context);
                          onSelectFun(cupertinoPickerIndex);
                        },
                      )
                    ],
                  ),
                ),
                Container(
                    height: SizeConfig.realScreenHeight * 0.3,
                    color: Color(0xfff7f7f7),
                    child:
                        buildPickerItems(context, items, decKey, onSelectFun))
              ],
            ),
          );
        });
  }

  TextStyle textStyle(context) =>
      TextStyle(color: Theme.of(context).primaryColor);

/* 
 *@author: Elham Rababah 
 *@Date:12/4/2020  
 *@param: context, List items, decKey, onSelectFun
 *@return: Container widget
 *@desc:   buildPickerIterm this function will build the items of the cupertino
 */
  buildPickerItems(context, List items, decKey, onSelectFun) {
    return CupertinoPicker(
      magnification: 1.5,
      scrollController: FixedExtentScrollController(initialItem: cupertinoPickerIndex),

      // backgroundColor: Colors.black87,
      children: items.map((item) {
        return Text(
          '${item["$decKey"]}',
          style: TextStyle(fontSize: SizeConfig.textMultiplier * 3),
        );
      }).toList(),

      itemExtent: 25, //height of each item
      looping: true,
      onSelectedItemChanged: (int index) {
        // selectitem =index;
        cupertinoPickerIndex = index;
      },
    );
  }

/* 
 *@author: Elham Rababah 
 *@Date:12/4/2020  
 *@param: msg
 *@return:  
 *@desc:   showErrorToast
*/
  showErrorToast([msg = null]) {
    String localMsg = generateContactAdminMsg();

    if (msg != null) {
      localMsg = msg.toString();
    }

    toastMsg.showErrorToast(localMsg);
  }

/*
 *@author: Mohammad Aljammal
 *@Date:27/4/2020
 *@param:
 *@return: Boolean
 *@desc: Check The Internet Connection
 */
  static Future<bool> checkConnection() async {
    ConnectivityResult connectivityResult =
        await (Connectivity().checkConnectivity());
    if ((connectivityResult == ConnectivityResult.mobile) ||
        (connectivityResult == ConnectivityResult.wifi)) {
      return true;
    } else {
      return false;
    }
  }

/*
 *@author: Elham Rababah
 *@Date:12/5/2020
 *@param:
 *@return: String
 *@desc: generate Contact Admin Msg
 */
  generateContactAdminMsg([err = null]) {
    String localMsg = 'Something wrong happened, please contact the admin';
    if (err != null) {
      localMsg = localMsg + '\n \n' + err.toString();
    }
    return localMsg;
  }
}