add deleting, promoting/demoting, guesting (soft banning) users

util.lua

@@ -14,6 +14,9 @@ util.TransientUser = {
   is_admin = function (self)
     return false
   end,
+  is_mod = function (self)
+    return false
+  end,
   is_guest = function (self)
     return true
   end,
@@ -116,7 +119,6 @@ function util.create_post(thread_id, user_id, content)
   
   local revision = PostHistory:create({
     post_id = post.id,
-    user_id = user_id,
     content = bb_content,
     is_initial_revision = true,
   })
@@ -127,4 +129,16 @@ function util.create_post(thread_id, user_id, content)
   return post
 end
 
-return util
+function util.transfer_and_delete_user(user)
+  local deleted_user = Users:find({
+    username = "DeletedUser",
+  })
+  -- this needs to be atomic
+  db.query("BEGIN")
+  db.query('UPDATE "threads" SET "user_id" = ? WHERE "user_id" = ?', deleted_user.id, user.id)
+  db.query('UPDATE "posts" SET "user_id" = ? WHERE "user_id" = ?', deleted_user.id, user.id)
+  user:delete() -- uncomment later
+  db.query("COMMIT")
+end
+
+return util