refactor(api): create story query helper

this is for retrieving + populating stories from a database with a specified query

lib/server/listQuerier.ts

@@ -0,0 +1,23 @@
+import { Band } from "~/models/band"
+import { Challenge } from "~/models/challenges/gen"
+import { Story } from "~/models/stories"
+
+export default async function(query, context, limit?, sort?) {
+	query["chapters.hidden"] = false
+		if(context.currentUser) {
+			if(!query.author) query.author = {}
+			if(!query["chapters.bands"]) query["chapters.bands"] = {}
+			query["chapters.bands"]["$nin"] = context.currentUser.hidden_bands
+			query["author"]["$nin"] = context.currentUser.hidden_authors
+		}
+		query["ficmas"] = {
+			"$nin": context.ficmasarray_raw.map(a => a._id)
+		};
+		console.log(query)
+		let stories = await Story.find(query, null).collation({locale: "en"}).sort(sort ? sort : {"chapters.posted": -1})
+			.populate({path: 'ficmas', populate: {path: 'wisher', model: 'User', select: 'username _id'}}).populate("chapters.bands")
+			.populate({path: "challenge", model: Challenge}).populate('author', 'username _id')
+			.limit(limit || Infinity)
+			.exec();
+		return stories
+}