examples: add typescript example

Author: RGBCube

examples/bookstore.ts

@@ -0,0 +1,72 @@
+import hx from "helix";
+
+const schema = hx.schema();
+
+const Chapter = schema.defineNode({
+  index: I64,
+});
+
+schema.index(Chapter.index, { unique: true });
+
+const SubChapter = schema.defineNode({
+  title: hx.String,
+  content: hx.String,
+
+  embedding: SubChapterEmbedding,
+});
+
+const SubChapterEmbedding = schema.defineVector({
+  dimensions: 1536,
+  hnsw: hx.cosine,
+});
+
+const Contains = schema.defineEdge({ from: Chapter, to: SubChapter });
+
+const ArgChapter = hx.Struct({
+  id: hx.I64,
+  subchapters: hx.List(ArgSubchapter),
+});
+
+const ArgSubChapter = hx.Struct({
+  title: hx.String,
+  content: hx.String,
+  chunk: hx.Vector,
+});
+
+const loadDocsRag = schema.query({
+  name: "loaddocs_rag",
+  arguments: [hx.List(ArgChapter)],
+  returns: hx.String,
+}, (db, [chapters]) => {
+  chapters.forEach((c) => {
+    const cNode = db.addNode(Chapter({ index: c.id }));
+
+    c.subchapters.forEach((sc) => {
+      const scNode = db.addNode(SubChapter({
+        title: sc.title,
+        content: sc.content,
+        embedding: SubChapterEmbedding(sc.chunk),
+      }));
+
+      db.addEdge(Contains({ from: cNode, to: scNode }));
+    });
+  });
+
+  return "Success";
+});
+
+const edgeNode = schema.query({
+  name: "edge_node",
+  arguments: [],
+  returns: hx.Iterator(Contains),
+}, (db, []) => {
+  return db.nodes[Chapter].outgoingEdges[Contains];
+});
+
+const edgeNodeId = schema.query({
+  name: "edge_node_id",
+  arguments: [hx.Id(Chapter)],
+  returns: hx.Iterator(Contains),
+}, (db, [id]) => {
+  return db.nodes[Chapter]({ id }).outgoingEdges[Contains];
+});