FIX: don't break import when raw can't be preprocessed (vBulletin importer)

script/import_scripts/vbulletin.rb

@@ -210,6 +210,8 @@ class ImportScripts::VBulletin < ImportScripts::Base
       break if topics.size < 1
 
       create_posts(topics, total: topic_count, offset: offset) do |topic|
+        raw = preprocess_post_raw(topic["raw"]) rescue nil
+        next if raw.blank?
         topic_id = "thread-#{topic["threadid"]}"
         @closed_topic_ids << topic_id if topic["open"] == "0"
         t = {
@@ -217,7 +219,7 @@ class ImportScripts::VBulletin < ImportScripts::Base
           user_id: user_id_from_imported_user_id(topic["postuserid"]) || Discourse::SYSTEM_USER_ID,
           title: @htmlentities.decode(topic["title"]).strip[0...255],
           category: category_from_imported_category_id(topic["forumid"]).try(:name),
-          raw: preprocess_post_raw(topic["raw"]),
+          raw: raw,
           created_at: parse_timestamp(topic["dateline"]),
           visible: topic["visible"].to_i == 1,
           views: topic["views"],
@@ -231,6 +233,9 @@ class ImportScripts::VBulletin < ImportScripts::Base
   def import_posts
     puts "", "importing posts..."
 
+    # make sure `firstpostid` is indexed
+    mysql_query("CREATE INDEX firstpostid_index ON thread (firstpostid)")
+
     post_count = mysql_query("SELECT COUNT(postid) count FROM post WHERE postid NOT IN (SELECT firstpostid FROM thread)").first["count"]
 
     batches(BATCH_SIZE) do |offset|
@@ -246,12 +251,14 @@ class ImportScripts::VBulletin < ImportScripts::Base
       break if posts.size < 1
 
       create_posts(posts, total: post_count, offset: offset) do |post|
+        raw = preprocess_post_raw(post["raw"]) rescue nil
+        next if raw.blank?
         next unless topic = topic_lookup_from_imported_post_id("thread-#{post["threadid"]}")
         p = {
           id: post["postid"],
           user_id: user_id_from_imported_user_id(post["userid"]) || Discourse::SYSTEM_USER_ID,
           topic_id: topic[:topic_id],
-          raw: preprocess_post_raw(post["raw"]),
+          raw: raw,
           created_at: parse_timestamp(post["dateline"]),
           hidden: post["visible"].to_i == 0,
         }