first commit

src/modules/feed/feed.repository.ts

@@ -0,0 +1,58 @@
+import { Injectable } from '@nestjs/common';
+import { InjectModel } from '@nestjs/mongoose';
+import { FilterQuery, Model, Types } from 'mongoose';
+import { Follow, FollowDocument } from '../follows/schemas/follow.schema';
+import { Post, PostDocument } from '../posts/schemas/post.schema';
+
+@Injectable()
+export class FeedRepository {
+  constructor(
+    @InjectModel(Post.name) private readonly postModel: Model<PostDocument>,
+    @InjectModel(Follow.name) private readonly followModel: Model<FollowDocument>,
+  ) {}
+
+  async findFollowingIds(userId: string): Promise<string[]> {
+    const rows = await this.followModel
+      .find({ followerId: new Types.ObjectId(userId) })
+      .select({ followingId: 1 })
+      .lean()
+      .exec();
+
+    return rows.map((row) => row.followingId.toString());
+  }
+
+  async findCandidatePosts(
+    filter: FilterQuery<PostDocument>,
+    limit: number,
+  ): Promise<PostDocument[]> {
+    const activeFilter: FilterQuery<PostDocument> = {
+      ...filter,
+      isDeleted: { $ne: true },
+    };
+
+    return this.postModel
+      .find(activeFilter)
+      .populate({
+        path: 'authorId',
+        select:
+          'name username stageName avatar isVerified isDisabled location latitude longitude musicGenres musicRoles favoriteInstruments favoriteMaqamat',
+      })
+      .sort({ createdAt: -1 })
+      .limit(limit)
+      .exec();
+  }
+
+  async findTrendingPublicPosts(skip: number, limit: number): Promise<PostDocument[]> {
+    return this.postModel
+      .find({ visibility: 'public', isDeleted: { $ne: true } })
+      .populate({ path: 'authorId', select: 'name username stageName avatar isVerified isDisabled' })
+      .sort({ likesCount: -1, commentsCount: -1, savesCount: -1, createdAt: -1 })
+      .skip(skip)
+      .limit(limit)
+      .exec();
+  }
+
+  async count(filter: FilterQuery<PostDocument>): Promise<number> {
+    return this.postModel.countDocuments({ ...filter, isDeleted: { $ne: true } }).exec();
+  }
+}