feat: improve logic for getrecipes

apps/api/src/xrpc/blue.recipes.feed.getRecipes.ts

···
-import { db, eq } from '@cookware/database';
+import { db, and, eq } from '@cookware/database';
 import { recipeTable } from '@cookware/database/schema';
 import { BlueRecipesActorDefs, BlueRecipesFeedGetRecipes, BlueRecipesFeedRecipe } from '@cookware/lexicons';
 import { json, XRPCRouter } from '@atcute/xrpc-server';
 import { parseDid } from '../util/api.js';
-import { AtprotoDid, ResourceUri } from '@atcute/lexicons/syntax';
+import { ResourceUri } from '@atcute/lexicons/syntax';
 import { Logger } from 'pino';
 import { isLegacyBlob } from '@atcute/lexicons/interfaces';
 
 export const registerGetRecipes = (router: XRPCRouter, _logger: Logger) => {
   router.addQuery(BlueRecipesFeedGetRecipes.mainSchema, {
-    async handler({ params: { author, limit } }) {
-      let foundDid: AtprotoDid | null = null;
-      if (author) foundDid = await parseDid(author);
+    async handler({ params: { author, limit, cursor } }) {
+      const whereClauses = [];
+      if (author) {
+        const did = await parseDid(author);
+        whereClauses.push(eq(recipeTable.did, did));
+      }
+
+      if (cursor) {
+        const { c } = JSON.parse(atob(cursor)) as { c: string };
+        whereClauses.push(eq(recipeTable.createdAt, new Date(c)));
+      }
 
       const recipes = await db.query.recipeTable.findMany({
         orderBy: recipeTable.createdAt,
         limit: limit,
-        where: foundDid ? eq(recipeTable.did, foundDid) : undefined,
+        where: whereClauses ? and(...whereClauses) : undefined,
       });
 
+      let nextCursor = '';
+      if (recipes.length == limit) {
+        const { createdAt } = recipes[limit - 1]!;
+        nextCursor = atob(JSON.stringify({ c: createdAt }));
+      }
+
       return json({
-        nextCursor: '',
+        nextCursor,
         recipes: recipes.map((recipe) => ({
           author: {
             $type: BlueRecipesActorDefs.profileViewBasicSchema.shape.$type.wrapped.expected,