Improve Facebook post publishing to support multiple images and stories

Update FacebookService to handle multi-photo carousel posts and refine story publishing logic; modify SchedulerService to pass all media for a post.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/hAPGvGl

server/services/facebook.ts

@@ -21,7 +21,7 @@ interface FacebookError {
 export class FacebookService {
   private baseUrl = 'https://graph.facebook.com/v23.0';
 
-  async publishPost(post: Post, page: SocialPage, postType: string, media?: Media): Promise<string> {
+  async publishPost(post: Post, page: SocialPage, postType: string, mediaList: Media[] = []): Promise<string> {
     if (page.platform !== 'facebook') {
       throw new Error('This service only supports Facebook pages');
     }
@@ -39,15 +39,28 @@ export class FacebookService {
     
     if (postType === 'story') {
       // Publish as story only
-      if (!media) {
+      if (mediaList.length === 0) {
         throw new Error('Stories require media (photo or video)');
       }
-      return await this.publishStory(post, page, media);
+      return await this.publishStory(post, page, mediaList[0]);
     } else {
       // Default to feed
-      if (media) {
-        return await this.publishPhotoPost(post, page, media);
+      // Count images only (videos not supported in multi-photo carousel)
+      const imageMedia = mediaList.filter(m => m.type === 'image');
+      
+      if (imageMedia.length > 1) {
+        // Multi-photo carousel (images only)
+        return await this.publishMultiPhotoPost(post, page, mediaList);
+      } else if (imageMedia.length === 1) {
+        // Single image (even if mixed with videos, prioritize the image)
+        return await this.publishPhotoPost(post, page, imageMedia[0]);
+      } else if (mediaList.length >= 1) {
+        // No images, but has media (likely video) - publish first media
+        // Note: Facebook /photos endpoint doesn't support videos well, this may fail
+        console.warn(`Publishing non-image media to Facebook feed - this may fail`);
+        return await this.publishPhotoPost(post, page, mediaList[0]);
       } else {
+        // Text only
         return await this.publishTextPost(post, page);
       }
     }
@@ -100,6 +113,79 @@ export class FacebookService {
     return data.post_id || data.id;
   }
 
+  private async publishMultiPhotoPost(post: Post, page: SocialPage, mediaList: Media[]): Promise<string> {
+    // Validate that all media are images
+    const imageMedia = mediaList.filter(m => m.type === 'image');
+    if (imageMedia.length === 0) {
+      throw new Error('Multi-photo posts require at least one image');
+    }
+    
+    if (imageMedia.length !== mediaList.length) {
+      console.warn(`Filtered out ${mediaList.length - imageMedia.length} non-image media from multi-photo post`);
+    }
+
+    // Step 1: Upload all photos as unpublished and collect photo IDs
+    const photoIds: string[] = [];
+
+    for (const media of imageMedia) {
+      const photoUrl = media.facebookFeedUrl || media.originalUrl;
+      
+      if (!photoUrl) {
+        console.warn(`Skipping media ${media.id} - no valid URL found`);
+        continue;
+      }
+
+      const uploadParams = new URLSearchParams({
+        access_token: page.accessToken!,
+        url: photoUrl,
+        published: 'false',
+      });
+
+      const uploadUrl = `${this.baseUrl}/${page.pageId}/photos?${uploadParams.toString()}`;
+
+      const uploadResponse = await fetch(uploadUrl, {
+        method: 'POST',
+      });
+
+      if (!uploadResponse.ok) {
+        const error = await uploadResponse.json() as FacebookError;
+        throw new Error(`Facebook API error uploading photo: ${error.error.message} (code: ${error.error.code})`);
+      }
+
+      const uploadData = await uploadResponse.json() as FacebookPhotoResponse;
+      photoIds.push(uploadData.id);
+    }
+    
+    if (photoIds.length === 0) {
+      throw new Error('No photos were successfully uploaded');
+    }
+
+    // Step 2: Create feed post with all attached photos
+    const feedParams = new URLSearchParams({
+      access_token: page.accessToken!,
+      message: post.content,
+    });
+
+    // Add each photo as attached_media
+    photoIds.forEach((photoId, index) => {
+      feedParams.append(`attached_media[${index}]`, JSON.stringify({ media_fbid: photoId }));
+    });
+
+    const feedUrl = `${this.baseUrl}/${page.pageId}/feed?${feedParams.toString()}`;
+
+    const feedResponse = await fetch(feedUrl, {
+      method: 'POST',
+    });
+
+    if (!feedResponse.ok) {
+      const error = await feedResponse.json() as FacebookError;
+      throw new Error(`Facebook API error creating feed post: ${error.error.message} (code: ${error.error.code})`);
+    }
+
+    const feedData = await feedResponse.json() as FacebookFeedResponse;
+    return feedData.id;
+  }
+
   async schedulePost(post: Post, page: SocialPage, scheduledTime: Date, media?: Media): Promise<string> {
     if (page.platform !== 'facebook') {
       throw new Error('This service only supports Facebook pages');

server/services/scheduler.ts

@@ -67,13 +67,19 @@ export class SchedulerService {
 
     console.log(`Publishing post ${post.id} to ${page.platform} page ${page.pageName}`);
 
-    // Get media if post has media
+    // Get all media for the post (for multi-photo carousels)
     const postMediaList = await storage.getPostMedia(post.id);
-    const media = postMediaList.length > 0 ? await storage.getMediaById(postMediaList[0].mediaId) : undefined;
+    const mediaList: any[] = [];
+    for (const pm of postMediaList) {
+      const media = await storage.getMediaById(pm.mediaId);
+      if (media) {
+        mediaList.push(media);
+      }
+    }
 
     // Validate that story posts have media
     // Note: "both" should never reach here since they're split at creation
-    if (scheduledPost.postType === 'story' && !media) {
+    if (scheduledPost.postType === 'story' && mediaList.length === 0) {
       const errorMsg = 'Les stories nécessitent un média. Ce post ne peut pas être publié.';
       console.error(`Deleting invalid story post ${scheduledPost.id} without media: ${errorMsg}`);
       
@@ -91,7 +97,7 @@ export class SchedulerService {
     let externalPostId: string;
     
     if (page.platform === 'facebook') {
-      externalPostId = await facebookService.publishPost(post, page, scheduledPost.postType, media || undefined);
+      externalPostId = await facebookService.publishPost(post, page, scheduledPost.postType, mediaList);
     } else if (page.platform === 'instagram') {
       // Instagram publishing not yet implemented
       console.warn(`Instagram publishing not yet implemented for post ${post.id}`);