Clean up and helper for formatting text

.env.save

···
+NAME="Bailey Townsend"
+DETAILS="Software Dev"

src/badge_display/mod.rs

···
 use uc8151::{asynch::Uc8151, UpdateRegion};
 use {defmt_rtt as _, panic_probe as _};
 
-use crate::Spi0Bus;
+use crate::{env::env_value, helpers::easy_format, Spi0Bus};
 
 //Display state
 pub static CURRENT_IMAGE: AtomicU8 = AtomicU8::new(0);
···
         .unwrap();
 
     // Create the text box and apply styling options.
+    let display_text = easy_format::<29>(format_args!(
+        "{}\n{}",
+        env_value("NAME"),
+        env_value("DETAILS")
+    ));
 
-    let text = "Bailey Townsend\nSoftware Dev";
     // \nWritten in rust\nRunning on a pico w";
-    let name_and_detail_box =
-        TextBox::with_textbox_style(text, name_and_detail_bounds, character_style, textbox_style);
+    let name_and_detail_box = TextBox::with_textbox_style(
+        &display_text,
+        name_and_detail_bounds,
+        character_style,
+        textbox_style,
+    );
 
     // Draw the text box.
     name_and_detail_box.draw(&mut display).unwrap();

src/env.rs

···
+use heapless::Vec;
+
+const ENV_DATA: &str = include_str!("../.env");
+
+pub fn env_value(key: &str) -> &'static str {
+    for line in ENV_DATA.lines() {
+        let parts: Vec<&str, 2> = line.split('=').collect();
+        if parts.len() == 2 {
+            if parts[0].trim() == key {
+                let mut value = parts[1].trim().chars();
+                value.next();
+                value.next_back();
+                return value.as_str();
+            }
+        }
+    }
+    panic!("Key: {:?} not found in .env file. May also need to provide your own .env from a copy of .env.save", key);
+}

src/helpers.rs

···
+use core::fmt::Arguments;
+use heapless::String;
+
+/// Makes it easier to format strings in a single line method
+pub fn easy_format<const N: usize>(args: Arguments<'_>) -> String<N> {
+    let mut formatted_string: String<N> = String::<N>::new();
+    let result = core::fmt::write(&mut formatted_string, args);
+    match result {
+        Ok(_) => formatted_string,
+        Err(_) => {
+            panic!("Error formatting the string")
+        }
+    }
+}

src/main.rs

···
 
 mod badge_display;
 mod cyw43_driver;
+mod env;
+mod helpers;
 
 type Spi0Bus = Mutex<NoopRawMutex, Spi<'static, SPI0, spi::Async>>;