Adding initialization work to display conditions.category and build q…

…ueries (#103)

query-connector/src/app/api/customize-query/conditions.ts

@@ -0,0 +1,19 @@
+import { NextResponse } from "next/server";
+import { getConditionsData } from "@/app/database-service";
+
+/**
+ * Handles a GET request to fetch conditions data.
+ * @returns Response with conditions data in JSON format.
+ */
+export async function GET() {
+  try {
+    const conditionsData = await getConditionsData();
+    return NextResponse.json(conditionsData, { status: 200 });
+  } catch (error) {
+    console.error("Error fetching conditions data:", error);
+    return NextResponse.json(
+      { error: "Failed to fetch conditions data" },
+      { status: 500 },
+    );
+  }
+}

query-connector/src/app/database-service.ts

@@ -561,3 +561,17 @@ export async function checkValueSetInsertion(vs: ValueSet) {
 
   return missingData;
 }
+
+/**
+ * Retrieves all records from the conditions table in the database.
+ * This function queries the database to fetch condition data, including
+ * condition name, code, and category.
+ * @returns results.rows A promise that resolves to an array of rows,
+ * each representing a condition with its associated fields (e.g., id, condition name,
+ * condition code, category). If no records are found, an empty array is returned.
+ */
+export async function getConditionsData() {
+  const query = "SELECT * FROM conditions";
+  const result = await dbClient.query(query);
+  return result.rows;
+}