Feat/wasm catalogue

Cargo.toml

@@ -6,5 +6,6 @@ members = [
     "qubed_meteo",
     "py_qubed",
     "py_qubed_meteo",
+    "qubed_wasm",
 ]
 

qubed/Cargo.toml

@@ -14,7 +14,8 @@ smallbitvec = "2.6.0"
 tiny-str = "0.10.0"
 tiny-vec = "0.10.0"
 chrono = "0.4"
-rayon = "1.7"
+# rayon is not available on wasm32; gate it behind a feature flag
+rayon = { version = "1.7", optional = true }
 
 [lib]
 path = "src/lib.rs"

qubed/src/qube.rs

@@ -213,6 +213,27 @@ impl Qube {
         map
     }
 
+    /// Returns the dimension name of every leaf node (i.e. the "frontier" keys
+    /// that appear at the deepest traversed level, used by the WASM catalogue to
+    /// determine which key should be shown next when no explicit ordering is known).
+    pub fn leaf_dimensions(&self) -> Vec<String> {
+        let paths = self.leaf_node_ids_paths();
+        let mut seen = HashSet::new();
+        let mut result = Vec::new();
+        for path in &paths {
+            if let Some(&leaf_id) = path.last() {
+                if let Some(node) = self.nodes.get(leaf_id) {
+                    if let Some(dim_str) = self.dimension_str(&node.dim) {
+                        if seen.insert(dim_str.to_string()) {
+                            result.push(dim_str.to_string());
+                        }
+                    }
+                }
+            }
+        }
+        result
+    }
+
     pub fn remove_node(&mut self, id: NodeIdx) -> Result<(), String> {
         let node = self.nodes.remove(id).ok_or_else(|| format!("Node {:?} not found", id))?;
 

qubed_wasm/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "qubed_wasm"
+version = "0.1.0"
+edition = "2024"
+description = "WebAssembly bindings for the qubed catalogue browser"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+qubed = { path = "../qubed" }
+wasm-bindgen = "0.2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+[profile.release]
+opt-level = "s"
+lto = true

qubed_wasm/build.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# Build the WASM catalogue module and copy it to the static folder.
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+OUT_DIR="$REPO_ROOT/stac_server/static/wasm"
+
+echo "Building qubed_wasm for wasm32-unknown-unknown …"
+cd "$SCRIPT_DIR"
+wasm-pack build \
+    --target web \
+    --release \
+    --out-dir "$OUT_DIR"
+
+echo ""
+echo "✓  Built to $OUT_DIR"
+echo "   qubed_wasm_bg.wasm : $(du -sh "$OUT_DIR/qubed_wasm_bg.wasm" | cut -f1)"
+echo ""
+echo "Restart your FastAPI server for changes to take effect."