refactor: restructure model to contain an object of rundowns

apps/client/src/common/utils/csv.ts

@@ -1,10 +1,31 @@
 import { stringify } from 'csv-stringify/browser/esm/sync';
+import { OntimeEntry, ProjectRundowns } from 'ontime-types';
 
 /**
- * @description Converts an array of arrays to a CSV file
- * @param {string[][]} arrayOfArrays
- * @return {string}
+ * Converts an array of arrays to a CSV file
  */
 export function makeCSVFromArrayOfArrays(arrayOfArrays: string[][]): string {
   return stringify(arrayOfArrays);
 }
+
+/**
+ * Receives an object of rundowns, and flattens them into a single, linear rundown
+ * Used for CSV export
+ */
+export function aggregateRundowns(rundowns: ProjectRundowns): OntimeEntry[] {
+  const rundownKeys = Object.keys(rundowns);
+  if (rundownKeys.length === 0) return [];
+  const flatRundown: OntimeEntry[] = [];
+
+  for (const key of rundownKeys) {
+    const { order, entries } = rundowns[key];
+
+    for (let i = 0; i < order.length; i++) {
+      const entryId = order[i];
+      const entry = entries[entryId];
+
+      flatRundown.push(entry);
+    }
+  }
+  return flatRundown;
+}