events.dart

import 'package:url_launcher/url_launcher.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:campusbuddy/notification.dart';
import 'package:campusbuddy/calendar.dart';
import 'package:flutter_linkify/flutter_linkify.dart';
import 'dart:async';
import 'gmaps.dart';

//Class that fetches and stores all details of added Events and Posts from Firestore.
class Deets {
  String title, venue, desc, imgURL, group;
  double longitude, latitude; //in console use double values, i.e: use 2.0 not 2
  DateTime time;
  Deets(this.title, this.time, this.venue, this.desc, this.imgURL, this.group,
      this.longitude, this.latitude);
}

class Events extends StatefulWidget {
  final Deets eventsDeets;
  Events(this.eventsDeets, {Key key}) : super(key: key);
  static const routeName = "/events";

  @override
  _EventsState createState() => _EventsState(eventsDeets);
}

class _EventsState extends State<Events> {
  static const Color black = const Color(0xff242424);
  static const Color indigo = const Color(0xff303E84);
  Deets deets;
  _EventsState(this.deets);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        slivers: <Widget>[
          SliverAppBar(
            floating: true,
            pinned: true,
            snap: true,
            expandedHeight: 210.0,
            backgroundColor: indigo,
            flexibleSpace: FlexibleSpaceBar(
              centerTitle: true,
              title: Padding(
                padding: const EdgeInsets.fromLTRB(20, 2, 20, 2),
                child: Text(
                  '${deets.group}',
                  style: TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.w500,
                    fontFamily: 'Roboto',
                    color: Colors.white,
                  ),
                  overflow: TextOverflow.ellipsis,
                ),
              ),
              background: Center(
                child: Container(
                  width: 120,
                  height: 120,
                  decoration: (deets.imgURL == null || deets.imgURL == '')
                      ? new BoxDecoration()
                      : new BoxDecoration(
                          shape: BoxShape.circle,
                          image: new DecorationImage(
                            fit: BoxFit.cover,
                            image: NetworkImage(deets.imgURL),
                          )),
                ),
              ),
            ),
          ),
          SliverToBoxAdapter(
            child: Material(
              color: Colors.white,
              child: Container(
                height: 1000,
                child: Column(
                  children: <Widget>[
                    Padding(
                      padding: const EdgeInsets.fromLTRB(10, 20, 0, 10),
                      child: Row(
                        children: <Widget>[
                          Expanded(
                            child: Container(
                              child: Text(deets.title,
                                  textAlign: TextAlign.left,
                                  style: TextStyle(
                                      color: indigo,
                                      fontSize: 30,
                                      fontWeight: FontWeight.w500,
                                      fontFamily: 'Roboto')),
                            ),
                            flex: 4,
                          ),
                          Expanded(
                            child: IconButton(
                              icon: new SvgPicture.asset(
                                  'assets/facebookLogo.svg'),
                              iconSize: 40,
                              onPressed: _launchURL,
                            ),
                            flex: 1,
                          ),
                        ],
                      ),
                    ),
                    Padding(
                      padding: const EdgeInsets.all(10.0),
                      child: Linkify(
                        onOpen: _onOpen,
                        text: "${deets.desc}",
                        style: TextStyle(
                          color: black,
                          fontSize: 19,
                          fontWeight: FontWeight.normal,
                          fontFamily: 'Roboto',
                          height: 1.8,
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton.extended(
        onPressed: () {
          // print(deets.latitude);
          // print(deets.longitude);
          Navigator.push(
              context,
              MaterialPageRoute(
                  builder: (context) => Gmaps(
                      latitude: deets.latitude, longitude: deets.longitude)));
        },
        label: const Text('Map'),
        icon: const Icon(Icons.map),
      ),
      bottomNavigationBar: Row(
        crossAxisAlignment: CrossAxisAlignment.end,
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[
          Expanded(child: ScheduleNotification(deets)),
          Container(
            width: 0.4,
            height: 60,
            color: Colors.white,
          ),
          Expanded(child: Calendar(deets)),
        ],
      ),
    );
  }
}

//for Launching FB Url:
_launchURL() async {
  const url = 'https://www.facebook.com/';
  if (await canLaunch(url)) {
    await launch(url);
  } else {
    throw 'Could not launch $url';
  }
}

//For opening Clickable links from description text:
Future<void> _onOpen(LinkableElement link) async {
  if (await canLaunch(link.url)) {
    await launch(link.url);
  } else {
    throw 'Could not launch $link';
  }
}