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#![deny(missing_docs)]
#![deny(warnings)]
pub use crate::codec::{PbLink, PbNode};
use core::convert::{TryFrom, TryInto};
use libipld_core::codec::{Codec, Decode, Encode};
use libipld_core::error::{Result, UnsupportedCodec};
use libipld_core::ipld::Ipld;
use std::io::{Read, Write};
mod codec;
#[derive(Clone, Copy, Debug)]
pub struct DagPbCodec;
impl Codec for DagPbCodec {}
impl From<DagPbCodec> for u64 {
fn from(_: DagPbCodec) -> Self {
libipld_core::cid::DAG_PROTOBUF
}
}
impl TryFrom<u64> for DagPbCodec {
type Error = UnsupportedCodec;
fn try_from(_: u64) -> core::result::Result<Self, Self::Error> {
Ok(Self)
}
}
impl Encode<DagPbCodec> for Ipld {
fn encode<W: Write>(&self, _: DagPbCodec, w: &mut W) -> Result<()> {
let pb_node: PbNode = self.try_into()?;
let bytes = pb_node.into_bytes();
w.write_all(&bytes)?;
Ok(())
}
}
impl Decode<DagPbCodec> for Ipld {
fn decode<R: Read>(_: DagPbCodec, r: &mut R) -> Result<Self> {
let mut bytes = Vec::new();
r.read_to_end(&mut bytes)?;
Ok(PbNode::from_bytes(&bytes)?.into())
}
}
#[cfg(test)]
mod tests {
use super::*;
use libipld_core::cid::{Cid, RAW};
use libipld_core::multihash::{Multihash, MultihashDigest, SHA2_256};
use std::collections::BTreeMap;
#[test]
fn test_encode_decode() {
let digest = Multihash::new(SHA2_256, &b"cid"[..]).unwrap();
let cid = Cid::new_v1(RAW, digest.to_raw().unwrap());
let mut pb_link = BTreeMap::<String, Ipld>::new();
pb_link.insert("Hash".to_string(), cid.into());
pb_link.insert("Name".to_string(), "block".to_string().into());
pb_link.insert("Tsize".to_string(), 13.into());
let links: Vec<Ipld> = vec![pb_link.into()];
let mut pb_node = BTreeMap::<String, Ipld>::new();
pb_node.insert("Data".to_string(), b"Here is some data\n".to_vec().into());
pb_node.insert("Links".to_string(), links.into());
let data: Ipld = pb_node.into();
let bytes = DagPbCodec.encode(&data).unwrap();
let data2 = DagPbCodec.decode(&bytes).unwrap();
assert_eq!(data, data2);
}
}