Improve random post picker

internal/services/postService.go

@@ -7,6 +7,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"math/rand"
 	"net/http"
 	"strings"
 
@@ -106,19 +107,33 @@ func (ps *PostService) InsertNewAccounts(newAccounts []domain.Account) int {
 
 func (ps *PostService) GetRandomPost() domain.Post {
 	var post domain.Post
-	orderExpr := "RANDOM()" // sqlite
-	if config.Config.DBEngine != "sqlite" {
-		orderExpr = "RAND()" // mariadb/mysql
+	var postIDs []uint
+
+	// AI Enhanced
+	// Step 1: Fetch eligible post IDs (with at least one approved attachment)
+	ps.db.
+		Model(&domain.Post{}).
+		Where("exists (select 1 from media_attachments where post_id = posts.id and approved = ?)", true).
+		Pluck("id", &postIDs)
+
+	if len(postIDs) == 0 {
+		return domain.Post{} // No eligible posts
 	}
+
+	// Step 2: Pick a random ID in Go
+	randomID := postIDs[rand.Intn(len(postIDs))]
+
+	// Step 3: Load the full post with related data
 	ps.db.
 		Preload("Account").
 		Preload("Attachments", "Approved = ?", true).
-		Where("exists (select 1 from media_attachments where post_id = posts.id and approved = ?)", true).
-		Order(orderExpr).
-		First(&post)
+		First(&post, randomID)
+
+	// Step 4: Keep only the first attachment if any
 	if len(post.Attachments) > 0 {
 		post.Attachments = []domain.MediaAttachment{post.Attachments[0]}
 	}
+
 	return post
 }