healthcare-doctor/lib/patient_dashboard/prescriptions/add_prescriptions.dart

import 'dart:convert';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:doctor/common/settings.dart';
import 'package:doctor/patient_dashboard/prescriptions/prescriptions.dart';
import 'package:image_picker/image_picker.dart';
import 'package:photo_view/photo_view.dart';
import 'package:pinch_zoom/pinch_zoom.dart';

class AddPrescription extends StatefulWidget {
  String? customerId;
  String? patName;
  String? patAge;
  String? patGender;
  AddPrescription({this.customerId,this.patName,this.patAge,this.patGender});


  @override
  State<AddPrescription> createState() => _AddPrescriptionState();
}

class _AddPrescriptionState extends State<AddPrescription> {

  final ImagePicker _picker = ImagePicker();
  String Url = '';
  final _transformationController = TransformationController();
  TapDownDetails _doubleTapDetails=TapDownDetails();
  TextEditingController prescriptionNameController = TextEditingController();
  TextEditingController patientNameController = TextEditingController();
  TextEditingController patientAgeController = TextEditingController();
  String? prescriptionFor;
  String? gender;

  Future pickImageFromGallery() async {
    try {
      final image = await _picker.pickImage(source: ImageSource.gallery);
      if (image == null) return;
      final imageTemp = File(image.path);

      AppSettings.preLoaderDialog(context);
      var res = await AppSettings.uploadImageHTTPForPrescriptions(image,widget.customerId);
      print(jsonDecode(res));
      Navigator.of(context, rootNavigator: true).pop();
      setState(() {
        Url = jsonDecode(res)['pictures'][0];
      });
    } on PlatformException catch (e) {
      print('Failed to pick image: $e');
    }
  }

  Future takeImageFromCamera() async {
    try {
      final image = await _picker.pickImage(source: ImageSource.camera);
      if (image == null) return;
      final imageTemp = File(image.path);
      AppSettings.preLoaderDialog(context);
      var res = await AppSettings.uploadImageHTTPForPrescriptions(image,widget.customerId);
      print(jsonDecode(res));
      Navigator.of(context, rootNavigator: true).pop();
      setState(() {
        Url = jsonDecode(res)['pictures'][0];
      });
    } on PlatformException catch (e) {
      print('Failed to pick image: $e');
    }
  }

  Widget zoomPhoto(var imageUrl){
    return Container(
        width: MediaQuery.of(context).size.width * .18,
        height: MediaQuery.of(context).size.height * .10,
        child: PhotoView(
          imageProvider: NetworkImage(imageUrl) as ImageProvider,
        )
    );
  }


  showPicDialog(var imageUrl){
    return showDialog(
      context: context,
      barrierDismissible: false,
      builder: (BuildContext context) {
        return StatefulBuilder(
            builder: (BuildContext context, StateSetter setState) {
              return AlertDialog(
                title: const Text(''),
                content: SingleChildScrollView(
                  child: ListBody(
                    children: <Widget>[
                      Container(
                          width: MediaQuery.of(context).size.width * .10,
                          height: MediaQuery.of(context).size.height * .50,
                          child: PhotoView(
                            imageProvider: NetworkImage(imageUrl) as ImageProvider,
                            maxScale: PhotoViewComputedScale.contained * 4.0,
                            minScale: PhotoViewComputedScale.contained,
                            initialScale: PhotoViewComputedScale.contained,
                            basePosition: Alignment.center,

                          )
                      )
                    ],
                  ),
                ),
                actions: <Widget>[
                  TextButton(
                    child: Text('Close', style: textButtonStyle()),
                    onPressed: () {
                      Navigator.of(context).pop();
                    },
                  ),
                ],
              );
            });
      },
    );
  }

  void _handleDoubleTap() {
    if (_transformationController.value != Matrix4.identity()) {
      _transformationController.value = Matrix4.identity();
    } else {
      final position = _doubleTapDetails.localPosition;
      // For a 3x zoom
      _transformationController.value = Matrix4.identity()
        ..translate(-position.dx * 2, -position.dy * 2)
        ..scale(3.0);
      // Fox a 2x zoom
      // ..translate(-position.dx, -position.dy)
      // ..scale(2.0);
    }
  }
  
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppSettings.appBar('Add Prescription'),
      body:SingleChildScrollView(
        child: Container(
            child: Padding(
              padding: EdgeInsets.all(10),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                mainAxisAlignment: MainAxisAlignment.start,
                children: [
                  ElevatedButton(
                    style: ElevatedButton.styleFrom(
                      primary: primaryColor, // background
                      onPrimary: Colors.white, // foreground
                    ),
                    onPressed: () async {
                      showModalBottomSheet<void>(
                          context: context,
                          builder: (BuildContext context) {
                            return SizedBox(
                              height: 200,
                              child: Center(
                                child: Row(
                                  mainAxisAlignment: MainAxisAlignment.center,
                                  children: <Widget>[
                                    GestureDetector(
                                      child: Icon(
                                        Icons.camera_alt_outlined,
                                        size: 100,
                                        color: primaryColor,
                                      ),
                                      onTap: () async {
                                        await takeImageFromCamera();
                                        Navigator.pop(context);
                                      },
                                    ),
                                    SizedBox(
                                      width: MediaQuery.of(context).size.width * .20,
                                    ),
                                    GestureDetector(
                                      child: Icon(
                                        Icons.photo,
                                        size: 100,
                                        color: primaryColor,
                                      ),
                                      onTap: () async {
                                        await pickImageFromGallery();
                                        Navigator.pop(context);
                                      },
                                    ),
                                  ],
                                ),
                              ),
                            );
                          });
                    },
                    child: const Text('Select image'),
                  ),
                  SizedBox(height:MediaQuery.of(context).size.height * .01,),
                  Visibility(
                      visible: Url != '',
                      child: GestureDetector(
                        child:
                        /*,*/
                        /*Container(
                        width: MediaQuery.of(context).size.width * .18,
                        height: MediaQuery.of(context).size.height * .10,
                        child: PhotoView(
                          imageProvider: NetworkImage(Url) as ImageProvider,
                          maxScale: PhotoViewComputedScale.contained * 4.0,
                          minScale: PhotoViewComputedScale.contained,
                          initialScale: PhotoViewComputedScale.contained,
                          basePosition: Alignment.center,

                        )
                    ),*/
                        Container(
                          width: MediaQuery.of(context).size.width * .18,
                          height: MediaQuery.of(context).size.height * .10,
                          decoration: BoxDecoration(
                              shape: BoxShape.rectangle,
                              image: DecorationImage(
                                  image: NetworkImage(Url) as ImageProvider, // picked file
                                  fit: BoxFit.fill)),
                        ),
                        onTap: (){
                          showPicDialog(Url);
                        },
                      )
                  ),
                  SizedBox(height:MediaQuery.of(context).size.height * .02,),
                  Container(
                    child: TextFormField(
                      cursorColor: greyColor,
                      controller: prescriptionNameController,
                      decoration: textFormFieldDecoration(Icons.edit,'Enter Prescription name'),

                    ),
                  ),
                  Row(
                    children: [

                      Expanded(child: RadioListTile(
                        title: Text("For Yourself"),
                        value: "self",
                        groupValue: prescriptionFor,
                        activeColor: primaryColor,
                        onChanged: (value){
                          setState(() {
                            prescriptionFor = value.toString();
                          });
                        },
                      ),),
                      Expanded(child: RadioListTile(
                        title: Text("For Family"),
                        value: "others",
                        groupValue: prescriptionFor,
                        activeColor: primaryColor,
                        onChanged: (value){
                          setState(() {
                            prescriptionFor = value.toString();
                          });
                        },
                      ),),
                    ],
                  ),
                  Visibility(
                    visible:prescriptionFor.toString().toLowerCase()=='others' ,
                    child: Container(
                      child: TextFormField(
                        cursorColor: greyColor,
                        controller: patientNameController,
                        decoration: textFormFieldDecoration(Icons.person,'Enter patient name'),

                      ),
                    ),),
                  SizedBox(height:MediaQuery.of(context).size.height * .02,),
                  Visibility(
                    visible:prescriptionFor.toString().toLowerCase()=='others' ,
                    child: Container(
                      child: TextFormField(
                        cursorColor: greyColor,
                        keyboardType: TextInputType.number,
                        controller: patientAgeController,
                        decoration: textFormFieldDecoration(Icons.person,'Enter patient age'),

                      ),
                    ),),
                  Visibility(
                    visible:prescriptionFor.toString().toLowerCase()=='others' ,
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.start,
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [

                        Expanded(child: RadioListTile(
                          title: Text("Male",style: TextStyle(fontSize: 10)),
                          value: "male",
                          groupValue: gender,
                          activeColor: primaryColor,
                          onChanged: (value){
                            setState(() {
                              gender = value.toString();
                            });
                          },
                        ),),
                        Expanded(child: RadioListTile(
                          title: Text("Female",style: TextStyle(fontSize: 10),),
                          value: "female",
                          groupValue: gender,
                          activeColor: primaryColor,
                          onChanged: (value){
                            setState(() {
                              gender = value.toString();
                            });
                          },
                        ),),
                        Expanded(child: RadioListTile(
                          title: Text("Others",style: TextStyle(fontSize: 10)),
                          value: "other",
                          groupValue: gender,
                          activeColor: primaryColor,
                          onChanged: (value){
                            setState(() {
                              gender = value.toString();
                            });
                          },
                        ),),
                      ],
                    ),),
                  SizedBox(height:MediaQuery.of(context).size.height * .02,),
                  Container(
                      width:double.infinity,
                      height: MediaQuery.of(context).size.height * .06,
                      child: ElevatedButton(
                        style: ElevatedButton.styleFrom(
                          primary: buttonColors, // background
                          onPrimary: Colors.black, // foreground
                        ),
                        onPressed: () async{
                          if(Url!=''&& prescriptionNameController.text!=''&&prescriptionFor!=''){

                            String _name='';
                            String _age='';
                            String? _gender='';

                            if(prescriptionFor.toString().toLowerCase()=='others'){
                              if(patientNameController!=''&& patientAgeController.text!=''&&gender!=''){
                                _name=patientNameController.text;
                                _age=patientAgeController.text;
                                _gender=gender;
                              }
                              else{
                                AppSettings.longFailedToast('Please enter details');
                              }
                            }
                            else{
                              _name=widget.patName!;
                              _age=widget.patAge!;
                              _gender=widget.patGender!;
                            }
                            AppSettings.preLoaderDialog(context);
                            bool isOnline = await AppSettings.internetConnectivity();
                              if(isOnline){
                              var payload = new Map<String, dynamic>();
                              payload["name"] = prescriptionNameController.text.toString();
                              payload["pictureUrl"] = Url.toString();
                              payload["patientType"] = prescriptionFor.toString();
                              payload["others"] ={
                                "name": _name,
                                "age": int.parse(_age),
                                "gender": _gender.toString().toLowerCase()
                              };
                              bool uploadStatus = await AppSettings.addPrescription(payload,widget.customerId);

                              try{
                                if(uploadStatus){
                                  Navigator.of(context,rootNavigator: true).pop();
                                  AppSettings.longSuccessToast('Prescription added successfully');
                                  Navigator.pop(context);
                                 /* await Navigator.push(
                                    context,
                                    MaterialPageRoute(
                                        builder: (context) => Prescriptions()),
                                  );*/
                                }
                                else{
                                  Navigator.of(context,rootNavigator: true).pop();
                                  AppSettings.longFailedToast('Fail to add prescription details');
                                }
                              }
                              catch(e){
                                print(e);
                                Navigator.of(context,rootNavigator: true).pop();
                                AppSettings.longFailedToast('Fail to add prescription details');
                              }


                              }
                              else{
                                AppSettings.longFailedToast('Please check internet');
                              }
                          }
                          else{
                            AppSettings.longFailedToast('Please upload image');
                          }


                        },
                        child: const Text('Upload'),
                      )),


                ],
              ),
            )) ,
      )
    );
  }
}