Initial

src/services/monitor.ts

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+import type { RedditApiClient, RedditPost } from '../reddit/api.js';
+import type { PostsRepository } from '../database/repositories.js';
+import type { Config } from '../config/index.js';
+import type { Logger } from '../utils/logger.js';
+
+export class MonitorService {
+  constructor(
+    private redditApi: RedditApiClient,
+    private postsRepo: PostsRepository,
+    private config: Config,
+    private logger: Logger
+  ) {}
+
+  async getUnprocessedPosts(): Promise<RedditPost[]> {
+    const unprocessedPosts: RedditPost[] = [];
+
+    for (const subreddit of this.config.reddit.subreddits) {
+      try {
+        this.logger.debug(`Checking r/${subreddit} for new posts...`);
+        const posts = await this.redditApi.getNewPosts(subreddit);
+
+        let newCount = 0;
+        for (const post of posts) {
+          if (!this.postsRepo.isProcessed(post.id)) {
+            unprocessedPosts.push(post);
+            newCount++;
+          }
+        }
+
+        if (newCount > 0) {
+          this.logger.info(`Found ${newCount} new posts in r/${subreddit}`);
+        }
+      } catch (error) {
+        this.logger.error(`Failed to fetch posts from r/${subreddit}:`, error);
+      }
+
+      // Small delay between subreddit fetches to be nice to Reddit
+      await this.sleep(1000);
+    }
+
+    // Sort by creation time (oldest first, so we process in order)
+    unprocessedPosts.sort((a, b) => a.created_utc - b.created_utc);
+
+    return unprocessedPosts;
+  }
+
+  private sleep(ms: number): Promise<void> {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+  }
+}