Add phased knowledge layer: comments and semantic linking pipeline

backend/src/search/meilisearch.service.ts

@@ -158,6 +158,58 @@ export class MeilisearchService {
     }
   }
 
+  buildSemanticChunkIndexName(tenantId: string): string {
+    const config = this.getConfig();
+    const prefix = config?.indexPrefix || 'tenant_';
+    return `${prefix}${tenantId}_semantic_chunks`.toLowerCase();
+  }
+
+  async upsertDocuments(indexName: string, documents: Record<string, any>[]): Promise<void> {
+    const config = this.getConfig();
+    if (!config || !Array.isArray(documents) || documents.length === 0) return;
+
+    const url = `${config.host}/indexes/${encodeURIComponent(indexName)}/documents?primaryKey=id`;
+    try {
+      const response = await this.requestJson('POST', url, documents, this.buildHeaders(config));
+      if (!this.isSuccessStatus(response.status)) {
+        this.logger.warn(`Meilisearch document upsert failed for index ${indexName}: ${response.status}`);
+      }
+    } catch (error) {
+      this.logger.warn(`Meilisearch document upsert failed: ${error.message}`);
+    }
+  }
+
+  async searchIndex(
+    indexName: string,
+    query: string,
+    limit = 20,
+  ): Promise<{ hits: any[]; total: number }> {
+    const config = this.getConfig();
+    if (!config) return { hits: [], total: 0 };
+
+    const url = `${config.host}/indexes/${encodeURIComponent(indexName)}/search`;
+    try {
+      const response = await this.requestJson(
+        'POST',
+        url,
+        { q: query, limit },
+        this.buildHeaders(config),
+      );
+
+      if (!this.isSuccessStatus(response.status)) {
+        this.logger.warn(`Meilisearch search failed for index ${indexName}: ${response.status}`);
+        return { hits: [], total: 0 };
+      }
+
+      const hits = Array.isArray(response.body?.hits) ? response.body.hits : [];
+      const total = response.body?.estimatedTotalHits ?? response.body?.nbHits ?? hits.length;
+      return { hits, total };
+    } catch (error) {
+      this.logger.warn(`Meilisearch search failed: ${error.message}`);
+      return { hits: [], total: 0 };
+    }
+  }
+
   private getConfig(): MeiliConfig | null {
     const host = process.env.MEILI_HOST || process.env.MEILISEARCH_HOST;
     if (!host) return null;