99 lines
2.7 KiB
Dart
99 lines
2.7 KiB
Dart
// Functions related to parsing JSON strings and objects.
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import '/var/config.dart';
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import 'package:flutter/material.dart';
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import 'dart:math';
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String formatOpenWeatherData(var data) {
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String location = pullOpenWeatherCity(data),
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temp = pullOpenWeatherTemp(data),
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conditions = pullOpenWeatherConditions(data),
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windSpeed = pullOpenWeatherWind(data),
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humidity = pullOpenWeatherHumidity(data);
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String windChill = getWindChill(temp, windSpeed), heatIndex = "";
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String comfort = "";
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String text =
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"$location is $temp$tempUnits and $conditions"
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" with a wind speed of $windSpeed$windUnits"
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" and humidity of $humidity$humidityUnits."
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" $windChill$heatIndex"
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" $comfort";
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final String doubleSpace = " ", singleSpace = " ";
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while (text.contains(doubleSpace)) {
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text = text.replaceAll(doubleSpace, singleSpace);
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}
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return text;
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}
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String pullOpenWeatherCity(var data) {
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String location = "${data['city']['name']} (${data['city']['country']})";
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if (debug) {
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debugPrint("DEBUG: location = '$location'");
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}
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return location;
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}
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String pullOpenWeatherTemp(var data) {
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String temp = data['list'][0]['main']['temp'].toString();
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if (debug) {
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debugPrint("DEBUG: temp = '$temp'");
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}
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return temp;
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}
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String pullOpenWeatherConditions(var data) {
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String conditions = data['list'][0]['weather'][0]['description'].toString();
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if (debug) {
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debugPrint("DEBUG: conditions = '$conditions'");
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}
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return conditions;
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}
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String pullOpenWeatherWind(var data) {
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String wind = data['list'][0]['wind']['speed'].toString();
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if (debug) {
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debugPrint("DEBUG: wind = '$wind'");
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}
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return wind;
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}
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String pullOpenWeatherHumidity(var data) {
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String humidity = data['list'][0]['main']['humidity'].toString();
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if (debug) {
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debugPrint("DEBUG: humidity = '$humidity'");
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}
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return humidity;
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}
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double calcWindChill(double temp, double windSpeed) {
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// ## Wind Chill ##
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// # Wind speed as noted in: https://answers.yahoo.com/question/index?qid=20091020183148AAHm3kB&guccounter=1
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// # More official source: https://www.weather.gov/media/epz/wxcalc/windChill.pdf
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double windChill =
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35.74 +
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(0.6215 * temp) -
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(35.75 * pow(windSpeed, 0.16)) +
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(0.4275 * temp * pow(windSpeed, 0.16));
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if (debug) {
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debugPrint("DEBUG: windChill = '$windChill'");
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}
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return windChill;
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}
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String getWindChill(String temp, String windSpeed) {
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double temperature = double.parse(temp);
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double wind = double.parse(windSpeed);
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if (temperature < 50 && wind > 5) {
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double windChill = calcWindChill((temperature), (wind));
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return "My guess is that's a wind chill of $windChill$tempUnits";
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}
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return "";
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}
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