From 8b98f9dd6ab621460ac4d9fbdcb409fa1e65453b Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Wed, 24 Jul 2019 13:16:59 +0100
Subject: [PATCH] [Rework] Remove rspamd.classifiers.lua

---
 rules/rspamd.classifiers.lua | 130 -----------------------------------
 rules/rspamd.lua             |   4 --
 2 files changed, 134 deletions(-)
 delete mode 100644 rules/rspamd.classifiers.lua

diff --git a/rules/rspamd.classifiers.lua b/rules/rspamd.classifiers.lua
deleted file mode 100644
index c65ffbb77..000000000
--- a/rules/rspamd.classifiers.lua
+++ /dev/null
@@ -1,130 +0,0 @@
---[[
-Copyright (c) 2011-2015, Vsevolod Stakhov <vsevolod@highsecure.ru>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-]]--
-
--- Detect language of message and selects appropriate statfiles for it
-
-local fun = require "fun"
-
--- Common labels for specific statfiles
-local many_recipients_label = 'many recipients'
-local undisclosed_recipients_label = 'undisclosed recipients'
-local list_label = 'maillist'
-local long_subject_label = 'long subject'
-
--- Get specific statfiles set based on message rules
-local function get_specific_statfiles(classifier, task)
-	local spec_st = {}
-	-- More 5 recipients
-	local st_many = classifier:get_statfile_by_label(many_recipients_label)
-	if st_many then
-		local rcpt = task:get_recipients(2)
-		if rcpt and #rcpt > 5 then
-			fun.each(function(v) table.insert(spec_st,v) end, st_many)
-		end
-	end
-	-- Undisclosed
-	local st_undisc = classifier:get_statfile_by_label(undisclosed_recipients_label)
-	if st_undisc then
-		local rcpt = task:get_recipients(2)
-		if rcpt and #rcpt == 0 then
-			fun.each(function(v) table.insert(spec_st,v) end, st_undisc)
-		end
-	end
-	-- Maillist
-	local st_maillist = classifier:get_statfile_by_label(list_label)
-	if st_maillist then
-		local unsub_header = task:get_header_raw('List-Unsubscribe')
-		if unsub_header then
-			fun.each(function(v) table.insert(spec_st,v) end, st_maillist)
-		end
-	end
-	-- Long subject
-	local st_longsubj = classifier:get_statfile_by_label(long_subject_label)
-	if st_longsubj then
-		local subj = task:get_header_raw('Subject')
-		if subj and string.len(subj) > 150 then
-			fun.each(function(v) table.insert(spec_st,v) end, st_longsubj)
-		end
-	end
-
-	if #spec_st > 1 then
-		return spec_st
-	else
-		return nil
-	end
-end
-
-classifiers['bayes'] = function(classifier, task, is_learn)
-	-- Subfunction for detection of message's language
-	local detect_language = function()
-		local parts = task:get_text_parts()
-		for _,p in ipairs(parts) do
-			local l = p:get_language()
-			if l then
-				return l
-			end
-		end
-		return nil
-	end
-
-	-- Main procedure
-	local selected = {}
-	local spec_st = get_specific_statfiles(classifier, task)
-	if spec_st then
-		if is_learn then
-			return spec_st
-		else
-			-- Merge tables
-			fun.each(function(v) table.insert(selected,v) end, spec_st)
-		end
-	end
-	-- Detect statfile by language
-	local language = detect_language()
-	if language then
-		-- Find statfiles with specified language
-		for _,st in ipairs(classifier:get_statfiles()) do
-			-- Skip labeled statfiles
-			if not st:get_label() then
-				local st_l = st:get_param('language')
-				if st_l and st_l == language then
-					-- Insert statfile with specified language
-					table.insert(selected, st)
-				end
-			end
-		end
-		if #selected > 1 then
-			return selected
-		end
-	end
-
-	-- Language not detected or specific language statfiles have not been found
-	for _,st in ipairs(classifier:get_statfiles()) do
-		-- Skip labeled statfiles
-		if not st:get_label() then
-			local st_l = st:get_param('language')
-			-- Insert only statfiles without language
-			if not st_l then
-				table.insert(selected, st)
-			end
-		end
-	end
-	if #selected > 1 then
-		return selected
-	end
-
-	return nil
-end
-
diff --git a/rules/rspamd.lua b/rules/rspamd.lua
index ccfee71b2..e82eee4fa 100644
--- a/rules/rspamd.lua
+++ b/rules/rspamd.lua
@@ -51,10 +51,6 @@ if rspamd_util.file_exists(local_conf .. '/local.d/rspamd.lua') then
   dofile(local_conf .. '/local.d/rspamd.lua')
 end
 
-if rspamd_util.file_exists(local_rules .. '/rspamd.classifiers.lua') then
-  dofile(local_rules .. '/rspamd.classifiers.lua')
-end
-
 local rmaps =  rspamd_config:get_all_opt("lua_maps")
 if rmaps and type(rmaps) == 'table' then
   local rspamd_logger = require "rspamd_logger"
-- 
2.39.5