3 files changed, 28 insertions, 2 deletions
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 13fe29b..066e79c 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -8,6 +8,7 @@ serde = { version = "1.0.217", features = ["derive"] }
 bincode = { version = "2.0.0-rc.3", features = ["derive"] }
 rocket = { workspace = true, optional = true }
 chrono = { version = "0.4.39", features = ["serde"] }
+blake3 = "1.5.5"
 
 [features]
 rocket = ["dep:rocket"]
diff --git a/common/src/impl.rs b/common/src/impl.rs
index a35216b..a98015a 100644
--- a/common/src/impl.rs
+++ b/common/src/impl.rs
@@ -3,7 +3,9 @@
     which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
     Copyright (C) 2025 metamuffin <metamuffin.org>
 */
-use crate::{ObjectIds, PeopleGroup, SourceTrack, SourceTrackKind, TmdbKind, TraktKind};
+use crate::{
+    Node, NodeID, ObjectIds, PeopleGroup, SourceTrack, SourceTrackKind, TmdbKind, TraktKind,
+};
 use std::{fmt::Display, str::FromStr};
 
 impl SourceTrackKind {
@@ -146,3 +148,21 @@ impl FromStr for PeopleGroup {
         })
     }
 }
+
+impl NodeID {
+    pub fn from_slug(slug: &str) -> Self {
+        let mut h = blake3::Hasher::new();
+        h.update(slug.as_bytes());
+        Self(*h.finalize().as_bytes())
+    }
+    #[inline]
+    pub fn from_node(node: &Node) -> Self {
+        Self::from_slug(&node.slug)
+    }
+}
+impl Node {
+    #[inline]
+    pub fn id(&self) -> NodeID {
+        NodeID::from_node(self)
+    }
+}
diff --git a/common/src/lib.rs b/common/src/lib.rs
index a72f345..05d1573 100644
--- a/common/src/lib.rs
+++ b/common/src/lib.rs
@@ -17,10 +17,15 @@ use bincode::{Decode, Encode};
 use serde::{Deserialize, Serialize};
 use std::{collections::BTreeMap, path::PathBuf};
 
+#[derive(
+    Clone, Copy, Debug, Serialize, Deserialize, Encode, Decode, PartialEq, Eq, PartialOrd, Ord,
+)]
+pub struct NodeID(pub [u8; 32]);
+
 #[derive(Debug, Clone, Deserialize, Serialize, Default, Encode, Decode)]
 pub struct Node {
     pub slug: String,
-    pub parents: Vec<String>,
+    pub parents: Vec<NodeID>,
     pub kind: Option<NodeKind>,
     pub poster: Option<Asset>,
     pub backdrop: Option<Asset>,