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use crate::common::hash::{self, Hasher};
use rusqlite::types::{FromSql, FromSqlError};
use rusqlite::{
types::{FromSqlResult, ToSqlOutput},
ToSql,
};
use serde::{Deserialize, Serialize};
use std::fmt::Display;
use std::path::PathBuf;
use std::str::FromStr;
#[derive(Debug)]
pub enum Error {
InvalidHash(hash::Error),
}
type Result<T> = std::result::Result<T, Error>;
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Hash, Eq)]
pub struct BlobRef(String);
impl BlobRef {
pub fn from_str(s: &str) -> Result<Self> {
hash::Hash::from_str(s).map_err(Error::InvalidHash)?;
Ok(Self(s.to_string()))
}
pub fn for_bytes(bytes: &[u8]) -> Self {
let mut hasher = Hasher::default();
hasher.update(bytes);
BlobRef(hasher.finish().to_base32())
}
pub(super) fn path(&self) -> PathBuf {
let mut buf = PathBuf::new();
buf.push(&self.0[0..4]);
buf.push(&self.0[4..]);
buf
}
}
impl Display for BlobRef {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "blobref:{}", self.0)
}
}
impl ToSql for BlobRef {
fn to_sql(&self) -> rusqlite::Result<rusqlite::types::ToSqlOutput<'_>> {
Ok(ToSqlOutput::Borrowed(rusqlite::types::ValueRef::Text(
self.0.as_bytes(),
)))
}
}
impl FromSql for BlobRef {
fn column_result(value: rusqlite::types::ValueRef<'_>) -> FromSqlResult<Self> {
let v: String = FromSql::column_result(value)?;
BlobRef::from_str(&v).map_err(|_| FromSqlError::InvalidType)
}
}
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