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//! This preprocessor converts the given binary into a space-separated hex string under the
//! key 'hex_data'. While this is not a complicated task, the hex preprocessor exists to remove
//! unnnecessary duplicate code and memory use, as searching the hex string is a common
//! function.
use std::collections::HashMap;

use preprocessor::Preprocessor;
use binary_object::BinaryObject;

pub struct HexPreprocessor;

impl Preprocessor for HexPreprocessor {
    fn process(&self, binary_object: &BinaryObject) -> HashMap<String, String> {
        let mut string = String::new();
        for byte in &binary_object.data {
            string.push_str(&format!("{:02X} ", byte));
        }
        hashmap! {
            String::from("hex_data") => string
        }
    }

    fn info(&self) -> (&'static str, &'static str) {
        ("hex", "creates a hexadecimal byte representation")
    }
}

// TODO: tests; see https://github.com/milesmcc/ArmorLib/issues/7