1 files changed, 61 insertions, 0 deletions
diff --git a/adenosine-pds/src/car.rs b/adenosine-pds/src/car.rs
new file mode 100644
index 0000000..5731848
--- /dev/null
+++ b/adenosine-pds/src/car.rs
@@ -0,0 +1,61 @@
+use anyhow::Result;
+
+use futures::TryStreamExt;
+use ipfs_sqlite_block_store::BlockStore;
+use iroh_car::CarReader;
+use libipld::block::Block;
+use std::path::PathBuf;
+use tokio::fs::File;
+use tokio::io::BufReader;
+
+pub fn load_car_to_sqlite(db_path: &PathBuf, car_path: &PathBuf) -> Result<()> {
+    let mut db: BlockStore<libipld::DefaultParams> =
+        { BlockStore::open(db_path, Default::default())? };
+
+    load_car_to_blockstore(&mut db, car_path)
+}
+
+pub fn load_car_to_blockstore(
+    db: &mut BlockStore<libipld::DefaultParams>,
+    car_path: &PathBuf,
+) -> Result<()> {
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .enable_all()
+        .build()?;
+    rt.block_on(inner_car_loader(db, car_path))
+}
+
+// this async function is wrapped in the sync version above
+async fn inner_car_loader(
+    db: &mut BlockStore<libipld::DefaultParams>,
+    car_path: &PathBuf,
+) -> Result<()> {
+    println!(
+        "{} - {}",
+        std::env::current_dir()?.display(),
+        car_path.display()
+    );
+    let car_reader = {
+        let file = File::open(car_path).await?;
+        let buf_reader = BufReader::new(file);
+        CarReader::new(buf_reader).await?
+    };
+    let car_header = car_reader.header().clone();
+
+    car_reader
+        .stream()
+        .try_for_each(|(cid, raw)| {
+            // TODO: error handling here instead of unwrap (?)
+            let block = Block::new(cid, raw).unwrap();
+            db.put_block(block, None).unwrap();
+            futures::future::ready(Ok(()))
+        })
+        .await?;
+
+    // pin the header
+    if car_header.roots().len() >= 1 {
+        db.alias(b"import".to_vec(), Some(&car_header.roots()[0]))?;
+    }
+
+    Ok(())
+}