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use std::{
fs::File,
io::{self, Write},
path::Path,
};
use digest::{self, Digest};
use olpc_cjson::CanonicalFormatter;
use serde::Serialize;
use serde_json::error::Result;
pub fn new_serializer<W: Write>(writer: W) -> serde_json::Serializer<W, CanonicalFormatter> {
serde_json::Serializer::with_formatter(writer, CanonicalFormatter::new())
}
pub fn to_writer<W: Write, T: ?Sized + Serialize>(writer: W, value: &T) -> Result<()> {
let mut ser = new_serializer(writer);
value.serialize(&mut ser)
}
pub fn to_file<P: AsRef<Path>, T: ?Sized + Serialize>(path: P, value: &T) -> io::Result<()> {
let file = File::create(path)?;
to_writer(&file, value)?;
file.sync_all()
}
pub fn digest<D: Digest + Write, T: ?Sized + Serialize>(value: &T) -> Result<digest::Output<D>> {
let mut digest = <D as Digest>::new();
to_writer(&mut digest, value)?;
Ok(digest.finalize())
}
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