Merge pull request 'Detect if a single post is paid or free' (#144) from whimsical-c4lic0/OF-DL:detect-free-and-paid-single-posts into master

Reviewed-on: #144

OF DL.Core/Services/DownloadService.cs

@@ -2082,6 +2082,7 @@ public class DownloadService(
         }
 
         int oldCount = 0, newCount = 0;
+        bool hasPaidPostMedia = false;
 
         foreach (KeyValuePair<long, string> postKvp in post.SinglePosts)
         {
@@ -2089,9 +2090,21 @@ public class DownloadService(
             PostEntities.SinglePost? postInfo = mediaInfo == null
                 ? null
                 : post.SinglePostObjects.FirstOrDefault(p => p.Media?.Contains(mediaInfo) == true);
-            string filenameFormat = configService.CurrentConfig.GetCreatorFileNameFormatConfig(username)
+
-                .PostFileNameFormat ?? "";
+            bool isPaidPost = IsPaidSinglePost(postInfo);
-            string postPath = configService.CurrentConfig.FolderPerPost && postInfo != null && postInfo.Id != 0
+            if (isPaidPost)
+            {
+                hasPaidPostMedia = true;
+            }
+
+            string filenameFormat = hasPaidPostMedia
+                ? configService.CurrentConfig.GetCreatorFileNameFormatConfig(username).PaidPostFileNameFormat ?? ""
+                : configService.CurrentConfig.GetCreatorFileNameFormatConfig(username).PostFileNameFormat ?? "";
+            string postPath = hasPaidPostMedia
+                ? configService.CurrentConfig.FolderPerPaidPost && postInfo != null && postInfo.Id != 0
+                    ? $"/Posts/Paid/{postInfo.Id} {postInfo.PostedAt:yyyy-MM-dd HH-mm-ss}"
+                    : "/Posts/Paid"
+                : configService.CurrentConfig.FolderPerPost && postInfo != null && postInfo.Id != 0
                     ? $"/Posts/Free/{postInfo.Id} {postInfo.PostedAt:yyyy-MM-dd HH-mm-ss}"
                     : "/Posts/Free";
 
@@ -2142,11 +2155,34 @@ public class DownloadService(
             TotalCount = post.SinglePosts.Count,
             NewDownloads = newCount,
             ExistingDownloads = oldCount,
-            MediaType = "Posts",
+            MediaType = hasPaidPostMedia ? "Paid Posts" : "Posts",
             Success = true
         };
     }
 
+    private static bool IsPaidSinglePost(PostEntities.SinglePost? postInfo)
+    {
+        if (postInfo == null || !postInfo.IsOpened)
+        {
+            return false;
+        }
+
+        if (string.IsNullOrWhiteSpace(postInfo.Price))
+        {
+            return false;
+        }
+
+        string normalizedPrice = postInfo.Price.Trim();
+        if (decimal.TryParse(normalizedPrice, NumberStyles.Any, CultureInfo.InvariantCulture, out decimal amount))
+        {
+            return amount > 0;
+        }
+
+        return !string.Equals(normalizedPrice, "0", StringComparison.OrdinalIgnoreCase) &&
+               !string.Equals(normalizedPrice, "0.0", StringComparison.OrdinalIgnoreCase) &&
+               !string.Equals(normalizedPrice, "0.00", StringComparison.OrdinalIgnoreCase);
+    }
+
     /// <summary>
     /// Downloads a single paid message collection (including previews).
     /// </summary>