blazehash 0.2.5

Forensic file hasher — hashdeep for the modern era, BLAKE3 by default
Documentation 
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use crate::algorithm::Algorithm;
use crate::hash::FileHashResult;
use anyhow::Result;
use serde_json::{json, Value};
use std::io::Write;

fn result_to_json(result: &FileHashResult, algorithms: &[Algorithm]) -> Value {
    let mut hashes = serde_json::Map::new();
    for algo in algorithms {
        if let Some(hash) = result.hashes.get(algo) {
            hashes.insert(algo.hashdeep_name().to_string(), json!(hash));
        }
    }
    let mut obj = serde_json::Map::new();
    obj.insert(
        "filename".to_string(),
        json!(result.path.display().to_string()),
    );
    obj.insert("size".to_string(), json!(result.size));
    obj.insert("hashes".to_string(), Value::Object(hashes));
    if let Some(entropy) = result.entropy {
        obj.insert("entropy".to_string(), json!(entropy));
    }
    Value::Object(obj)
}

pub fn write_json<W: Write>(
    w: &mut W,
    results: &[FileHashResult],
    algorithms: &[Algorithm],
) -> Result<()> {
    let arr: Vec<Value> = results
        .iter()
        .map(|r| result_to_json(r, algorithms))
        .collect();
    serde_json::to_writer_pretty(&mut *w, &arr)?;
    writeln!(w)?;
    Ok(())
}

pub fn write_jsonl<W: Write>(
    w: &mut W,
    results: &[FileHashResult],
    algorithms: &[Algorithm],
) -> Result<()> {
    for result in results {
        let val = result_to_json(result, algorithms);
        serde_json::to_writer(&mut *w, &val)?;
        writeln!(w)?;
    }
    Ok(())
}