Fix reply consistency and source validation

src/lib/bots/contentSourceValidation.ts

@@ -0,0 +1,83 @@
+import type { ContentSourceConfig } from './contentSource';
+import { ContentSourceValidationError, validateContentSourceConfig } from './contentSource';
+import { fetchRSSFeed, fetchRedditPosts, fetchNewsApi, fetchBraveNews, NetworkError, ParseError } from './contentFetcher';
+import type { FeedItem } from './rssParser';
+
+const VALIDATION_TIMEOUT_MS = 10000;
+
+export async function validateSourceReachability(config: ContentSourceConfig): Promise<void> {
+  const validation = validateContentSourceConfig(config);
+  if (!validation.valid) {
+    throw new ContentSourceValidationError(
+      `Invalid content source configuration: ${validation.errors.join(', ')}`,
+      validation.errors
+    );
+  }
+
+  try {
+    let items: FeedItem[] = [];
+
+    switch (config.type) {
+      case 'rss':
+      case 'youtube':
+        items = await fetchRSSFeed(config.url, { maxItems: 1, timeout: VALIDATION_TIMEOUT_MS });
+        break;
+
+      case 'reddit':
+        items = await fetchRedditPosts(
+          config.subreddit || '',
+          { maxItems: 1, timeout: VALIDATION_TIMEOUT_MS }
+        );
+        break;
+
+      case 'news_api':
+        items = await fetchNewsApi(
+          config.url,
+          config.apiKey || '',
+          { maxItems: 1, timeout: VALIDATION_TIMEOUT_MS }
+        );
+        break;
+
+      case 'brave_news':
+        items = await fetchBraveNews(
+          config.braveNewsConfig || { query: '' },
+          config.apiKey || '',
+          { maxItems: 1, timeout: VALIDATION_TIMEOUT_MS }
+        );
+        break;
+
+      default:
+        items = [];
+    }
+
+    if (!items || items.length === 0) {
+      throw new ContentSourceValidationError(
+        'Source is reachable but returned no items',
+        ['Source is reachable but returned no items']
+      );
+    }
+  } catch (error) {
+    if (error instanceof ContentSourceValidationError) {
+      throw error;
+    }
+
+    if (error instanceof NetworkError || error instanceof ParseError) {
+      throw new ContentSourceValidationError(
+        `Could not validate source: ${error.message}`,
+        [error.message]
+      );
+    }
+
+    if (error instanceof Error) {
+      throw new ContentSourceValidationError(
+        `Could not validate source: ${error.message}`,
+        [error.message]
+      );
+    }
+
+    throw new ContentSourceValidationError(
+      'Could not validate source',
+      ['Could not validate source']
+    );
+  }
+}