context.rs

use anyhow::{Context};
use std::fs::File;
use std::io::{Read};

fn read_file_contents(path: &str) -> tomercode_error::Result<String> {
    let contents = open_file(path).with_context(|| format!("Failed to open file: {}", path))?;
    let processed_contents = process_contents(&contents).context("could not process file contents")?;
    Ok(processed_contents)
}

fn open_file(path: &str) -> anyhow::Result<String> {
    let mut file = File::open(path).context("could not open file")?;
    let mut contents = String::new();
    file.read_to_string(&mut contents).with_context(|| format!("Failed to read file: {}", path))?;
    Ok(contents)
}

fn process_contents(contents: &str) -> tomercode_error::Result<String> {
    // Simulate processing logic (e.g., parsing, transformation)
    if contents.contains("error") {
        return Err(TomerCodeError::InvalidState(anyhow::anyhow!("Processing error: 'error' found in contents")));
    }
    Ok(contents.to_owned())
}

fn main() {
    let file_path = "file.txt";

    read_file_contents(file_path).context("failed to read file contents").unwrap();
}