feat(query-generation): made some things parallel

Author: akshatdubeysf

.eslintignore

@@ -6,3 +6,4 @@ mochawesome-report
 commitlint.config.js
 .czferc.js
 /migrations
+/scripts

scripts/visualize-graph.ts

@@ -0,0 +1,30 @@
+/**
+ * Run with: npx ts-node scripts/visualize-graph.ts
+ * Outputs a Mermaid diagram of the DbQuery graph to stdout.
+ * Paste the output into https://mermaid.live to visualize.
+ */
+import {Context} from '@loopback/core';
+import {DbQueryGraph, DbQueryNodes} from '../src/components';
+import {GRAPH_NODE_NAME} from '../src/constant';
+
+async function main() {
+  const context = new Context('visualize');
+  context.bind('DbQueryGraph').toClass(DbQueryGraph);
+
+  // Register dummy nodes for all enum values
+  for (const key of Object.values(DbQueryNodes)) {
+    context
+      .bind(`services.${key}`)
+      .to({execute: async (state: unknown) => state})
+      .tag({[GRAPH_NODE_NAME]: key});
+  }
+
+  const graphBuilder = await context.get<DbQueryGraph>('DbQueryGraph');
+  const compiled = await graphBuilder.build();
+  const graph = compiled.getGraph();
+  const mermaid = graph.drawMermaid();
+
+  console.log(mermaid);
+}
+
+main().catch(console.error);