Initial commit

Cargo.toml

@@ -1,8 +1,23 @@
 [package]
 name = "aozora"
 version = "0.1.0"
+authors = ["ElnuDev <elnu@elnu.com>"]
 edition = "2021"
+description = "A simple CLI for fetching Plume Labs air quality info."
+homepage = "https://github.com/ElnuDev/aozora/"
+repository = "https://github.com/ElnuDev/aozora/"
+license = "GPL-3.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[profile.release]
+strip = true
+lto = true
+codegen-units = 1
+
 [dependencies]
+clap = { version = "3.2.22", features = ["derive"] }
+colored = "2.0.0"
+derive_more = "0.99.17"
+reqwest = { version = "0.11.12", features = ["blocking"] }
+scraper = "0.13.0"

src/main.rs

@@ -1,3 +1,73 @@
-fn main() {
-    println!("Hello, world!");
+use clap::Parser;
+use derive_more::From;
+use scraper::{Html, Selector};
+use colored::Colorize;
+
+#[derive(Default, Parser)]
+#[clap(author, version, about)]
+struct Arguments {
+    #[clap(help = "Plume Labs location ID. For example, https://air.plumelabs.com/air-quality-in-XXX")]
+    location: String,
+    #[clap(short, long, help = "Display raw Air Quality Index")]
+    raw: bool,
+    #[clap(short, long, help = "Display AccuWeather Air Quality Index description")]
+    description: bool,
+}
+
+#[derive(From, Debug)]
+enum Error {
+    ReqwestError(reqwest::Error),
+    HttpError,
+    InvalidResponse,
+}
+
+fn main() -> Result<(), Error> {
+    let arguments = Arguments::parse();
+    let response = reqwest::blocking::get(format!("https://air.plumelabs.com/air-quality-in-{}", arguments.location))?;
+    if !response.status().is_success() {
+        return Err(Error::HttpError);
+    }
+    let content = response.text_with_charset("utf-8")?;
+    let document = Html::parse_document(&content);
+    let selector = Selector::parse("span[data-role=\"current-pi\"]").unwrap();
+    let aqi = match match document.select(&selector).next() {
+        Some(element) => element,
+        None => return Err(Error::InvalidResponse),
+    }.inner_html().trim().parse::<f32>() {
+        Ok(aqi) => aqi,
+        Err(_) => return Err(Error::InvalidResponse),
+    } as u32;
+    if arguments.raw {
+        println!("{}", aqi);
+        return Ok(());
+    }
+    println!("{} {}",
+        match aqi {
+            250.. => "Dangerous".purple(),
+            150.. => "Very Unhealthy".purple(),
+            100.. => "Unhealthy".magenta(),
+            50.. => "Poor".red(),
+            20.. => "Fair".yellow(),
+            0.. => "Excellent".green(),
+        }.bold(),
+        match aqi {
+            // 250.. => (no appropriate terminal color) // Dangerous 250+
+            150.. => aqi.to_string().purple(), // Very Unhealthy 150-249
+            100.. => aqi.to_string().magenta(), // Unhealthy 100-149
+            50.. => aqi.to_string().red(), // Poor 50-99
+            20.. => aqi.to_string().yellow(), // Fair 20-49
+            0.. => aqi.to_string().green(), // Excellent 0-19
+        }.bold()
+    );
+    if arguments.description {
+        println!("{}", match aqi {
+            250.. => "Any exposure to the air, even for a few minutes, can lead to serious health effects on everybody. Avoid outdoor activities.",
+            150.. => "Health effects will be immediately felt by sensitive groups and should avoid outdoor activity. Healthy individuals are likely to experience difficulty breathing and throat irritation; consider staying indoors and rescheduling outdoor activities.",
+            100.. => "Health effects can be immediately felt by sensitive groups. Healthy individuals may experience difficulty breathing and throat irritation with prolonged exposure. Limit outdoor activity.",
+            50.. => "The air has reached a high level of pollution and is unhealthy for sensitive groups. Reduce time spent outside if you are feeling symptoms such as difficulty breathing or throat irritation.",
+            20.. => "The air quality is generally acceptable for most individuals. However, sensitive groups may experience minor to moderate symptoms from long-term exposure.",
+            0.. => "The air quality is ideal for most individuals; enjoy your normal outdoor activities.",
+        });
+    }
+    return Ok(());
 }