Add AI-powered description generation for video content

Integrates OpenAI API to generate video descriptions using AI, with new API endpoints for single and bulk generation, and a UI button in the admin panel to trigger the process. Includes OpenAI dependency and a new `aiService.ts` file.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 170e18f0-0f13-4eca-8643-546bba1dd8cc
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/170e18f0-0f13-4eca-8643-546bba1dd8cc/td5Y4HG

server/aiService.ts

@@ -0,0 +1,101 @@
+import OpenAI from "openai";
+
+// the newest OpenAI model is "gpt-5" which was released August 7, 2025. do not change this unless explicitly requested by the user
+const openai = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });
+
+export interface DescriptionGenerationOptions {
+  maxCharacters?: number;
+  language?: string;
+  includeArtistInfo?: boolean;
+  includeLabelInfo?: boolean;
+}
+
+export async function generateVideoDescription(
+  title: string, 
+  options: DescriptionGenerationOptions = {}
+): Promise<string> {
+  const {
+    maxCharacters = 500,
+    language = "slovenian",
+    includeArtistInfo = true,
+    includeLabelInfo = true
+  } = options;
+
+  try {
+    const prompt = `Analiziraj naslov videoisranja: "${title}"
+
+Nalogo izvršit v slovenskem jeziku.
+
+Iz naslova izvleci:
+- Ime izvajalca/umetnika
+- Naslov skladbe/komada 
+- Tip vsebine (pesem, instrumental, live nastop, itd.)
+
+Ustvari informativen opis, ki vključuje:
+${includeArtistInfo ? '- Informacije o izvajalcu (stil glasbe, kratka zgodovina, znani komadi)' : ''}
+${includeLabelInfo ? '- Informacije o založbi ali labelu, če je znan' : ''}
+- Opis stila glasbe in žanra
+- Kratko ozadje o komadu, če je znan
+- Čemu je namenjen (ples, poslušanje, koncert, itd.)
+
+Opis naj bo dolg maksimalno ${maxCharacters} znakov.
+Opis naj bo napisan v prijaznem, informativnem tonu.
+Ne uporabljaj besed "video" ali "posnetek" - piši o glasbi sami.
+
+Odgovori samo z opisom, brez dodatnih pojasnil.`;
+
+    const response = await openai.chat.completions.create({
+      model: "gpt-5", // the newest OpenAI model is "gpt-5" which was released August 7, 2025
+      messages: [
+        {
+          role: "system",
+          content: "Si strokovnjak za glasbo in pomagaš ustvarjati kakovostne opise za glasbene vsebine. Odgovarjaš vedno v slovenskem jeziku."
+        },
+        {
+          role: "user", 
+          content: prompt
+        }
+      ],
+      max_tokens: Math.ceil(maxCharacters / 2), // Rough estimate: 2 characters per token
+      temperature: 0.7,
+    });
+
+    const description = response.choices[0].message.content?.trim() || "";
+    
+    // Ensure we don't exceed character limit
+    if (description.length > maxCharacters) {
+      return description.substring(0, maxCharacters - 3) + "...";
+    }
+    
+    return description;
+    
+  } catch (error) {
+    console.error("Error generating video description:", error);
+    throw new Error("Napaka pri generiranju opisa s strani AI");
+  }
+}
+
+export async function generateBulkDescriptions(
+  videos: Array<{ id: string; title: string }>,
+  options: DescriptionGenerationOptions = {}
+): Promise<Array<{ id: string; description: string; error?: string }>> {
+  const results = [];
+  
+  for (const video of videos) {
+    try {
+      const description = await generateVideoDescription(video.title, options);
+      results.push({ id: video.id, description });
+      
+      // Add small delay to respect API rate limits
+      await new Promise(resolve => setTimeout(resolve, 100));
+    } catch (error) {
+      results.push({ 
+        id: video.id, 
+        description: "", 
+        error: error instanceof Error ? error.message : "Unknown error"
+      });
+    }
+  }
+  
+  return results;
+}

server/routes.ts

@@ -18,6 +18,7 @@ import sharp from "sharp";
 import fetch from "node-fetch";
 import { setupAuth, isAuthenticated, isAdmin } from "./replitAuth";
 import { ObjectStorageService, ObjectNotFoundError } from "./objectStorage";
+import { generateVideoDescription, generateBulkDescriptions } from "./aiService";
 
 // Extend express session
 declare module "express-session" {
@@ -1080,6 +1081,88 @@ export async function registerRoutes(app: Express): Promise<Server> {
     }
   });
 
+  // ===== AI DESCRIPTION ROUTES =====
+
+  // Generate AI description for single video (admin only)
+  app.post('/api/admin/videos/:id/generate-description', isAdmin, async (req, res) => {
+    try {
+      const videoId = req.params.id;
+      const { maxCharacters = 500, includeArtistInfo = true, includeLabelInfo = true } = req.body;
+      
+      // Get video details
+      const video = await storage.getVideo(videoId);
+      if (!video) {
+        return res.status(404).json({ message: "Video not found" });
+      }
+      
+      // Generate description using AI
+      const description = await generateVideoDescription(video.title, {
+        maxCharacters,
+        language: "slovenian",
+        includeArtistInfo,
+        includeLabelInfo
+      });
+      
+      res.json({ 
+        description,
+        title: video.title,
+        characterCount: description.length,
+        maxCharacters
+      });
+      
+    } catch (error) {
+      console.error("Error generating AI description:", error);
+      res.status(500).json({ 
+        message: error instanceof Error ? error.message : "Failed to generate description" 
+      });
+    }
+  });
+
+  // Generate AI descriptions for multiple videos (admin only)
+  app.post('/api/admin/videos/generate-descriptions-bulk', isAdmin, async (req, res) => {
+    try {
+      const { videoIds, maxCharacters = 500, includeArtistInfo = true, includeLabelInfo = true } = req.body;
+      
+      if (!Array.isArray(videoIds) || videoIds.length === 0) {
+        return res.status(400).json({ message: "Video IDs array is required" });
+      }
+      
+      if (videoIds.length > 50) {
+        return res.status(400).json({ message: "Maximum 50 videos can be processed at once" });
+      }
+      
+      // Get video details for all requested videos
+      const videos = [];
+      for (const id of videoIds) {
+        const video = await storage.getVideo(id);
+        if (video) {
+          videos.push({ id: video.id, title: video.title });
+        }
+      }
+      
+      // Generate descriptions using AI
+      const results = await generateBulkDescriptions(videos, {
+        maxCharacters,
+        language: "slovenian", 
+        includeArtistInfo,
+        includeLabelInfo
+      });
+      
+      res.json({
+        results,
+        processed: results.length,
+        successful: results.filter(r => !r.error).length,
+        failed: results.filter(r => r.error).length
+      });
+      
+    } catch (error) {
+      console.error("Error generating bulk AI descriptions:", error);
+      res.status(500).json({ 
+        message: error instanceof Error ? error.message : "Failed to generate descriptions" 
+      });
+    }
+  });
+
   const httpServer = createServer(app);
   return httpServer;
 }