FLUTTER: how ro format Open weather sunrise and sunshine data? - flutter

Question

I'm trying to format the json data below to get time only. NOT time and date. But I havent been able to do it. How could you do it?
Thanks for the help.
Json Data from open weather:
{
"coord": {
"lon": -0.13,
"lat": 51.51
},
"weather": [
{
"id": 300,
"main": "Drizzle",
"description": "light intensity drizzle",
"icon": "09d"
}
],
"base": "stations",
"main": {
"temp": 280.32,
"pressure": 1012,
"humidity": 81,
"temp_min": 279.15,
"temp_max": 281.15
},
"visibility": 10000,
"wind": {
"speed": 4.1,
"deg": 80
},
"clouds": {
"all": 90
},
"dt": 1485789600,
"sys": {
"type": 1,
"id": 5091,
"message": 0.0103,
"country": "GB",
"sunrise": 1485762037,
"sunset": 1485794875
},
"id": 2643743,
"name": "London",
"cod": 200
}
This is the part I'd like to format:
"sys": {
"message": 0.0025,
"country": "JP",
"sunrise": 1485726240,
"sunset": 1485763863
}

Answer 1

I guess you can do something like this to parse the values for sunrise and sunset and get the hour and minute of each time. Take a look and please tell me if you want any changes:
import 'dart:convert';
void main() {
const jsonString = '''
{
"coord": {
"lon": -0.13,
"lat": 51.51
},
"weather": [
{
"id": 300,
"main": "Drizzle",
"description": "light intensity drizzle",
"icon": "09d"
}
],
"base": "stations",
"main": {
"temp": 280.32,
"pressure": 1012,
"humidity": 81,
"temp_min": 279.15,
"temp_max": 281.15
},
"visibility": 10000,
"wind": {
"speed": 4.1,
"deg": 80
},
"clouds": {
"all": 90
},
"dt": 1485789600,
"sys": {
"type": 1,
"id": 5091,
"message": 0.0103,
"country": "GB",
"sunrise": 1485762037,
"sunset": 1485794875
},
"id": 2643743,
"name": "London",
"cod": 200
}
''';
dynamic jsonObject = jsonDecode(jsonString);
dynamic sys = jsonObject['sys'];
print(sys);
// {type: 1, id: 5091, message: 0.0103, country: GB, sunrise: 1485762037, sunset: 1485794875}
sys['sunrise'] = getClockInUtcPlus3Hours(sys['sunrise'] as int);
sys['sunset'] = getClockInUtcPlus3Hours(sys['sunset'] as int);
print(sys);
// {type: 1, id: 5091, message: 0.0103, country: GB, sunrise: 10:37, sunset: 19:55}
print(json.encode(sys));
// {"type":1,"id":5091,"message":0.0103,"country":"GB","sunrise":"10:37","sunset":"19:55"}
print('sunrise: ${getClockInUtcPlus3Hours(1485762037)}'); // sunrise: 10:37
print('sunset: ${getClockInUtcPlus3Hours(1485794875)}'); // sunset: 19:55
}
String getClockInUtcPlus3Hours(int timeSinceEpochInSec) {
final time = DateTime.fromMillisecondsSinceEpoch(timeSinceEpochInSec * 1000,
isUtc: true)
.add(const Duration(hours: 3));
return '${time.hour}:${time.second}';
}