yngvi 0.4.3

Read, calculate and write weather data
Documentation 
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use crate::core::WeatherReadingSource;
use std::{
    fs::File,
    io::{stdin, BufRead, BufReader},
};

pub struct FileReader;

impl FileReader {
    pub fn read_from(path: &str) -> impl Iterator<Item = WeatherReadingSource> {
        let f = File::open(path).expect(format!("could not find file at {}", path).as_str());

        BufReader::new(f)
            .lines()
            .filter_map(|line| line.ok())
            .filter_map(|line| {
                if let Ok(reading) = serde_json::from_str::<WeatherReadingSource>(&line) {
                    return Some(reading);
                }

                None
            })
    }
}

pub struct StdinReader;

impl StdinReader {
    pub fn read() -> impl Iterator<Item = WeatherReadingSource> {
        stdin()
            .lines()
            .filter_map(|line| line.ok())
            .filter_map(|line| {
                if let Ok(reading) = serde_json::from_str::<WeatherReadingSource>(&line) {
                    return Some(reading);
                }

                None
            })
    }
}