--
--      call_block-FS
--      Version: MPL 1.1
--
--      The contents of this file are subject to the Mozilla Public License Version
--      1.1 (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.mozilla.org/MPL/
--
--      Software distributed under the License is distributed on an "AS IS" basis,
--      WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
--      for the specific language governing rights and limitations under the
--      License.
--
--      The Original Code is call_block-FS
--
--      The Initial Developer of the Original Code is
--      Gerrit Visser <gerrit308@gmail.com>
--      Copyright (C) 2011
--      the Initial Developer. All Rights Reserved.
--
--      Contributor(s):
--      Gerrit Visser <gerrit308@gmail.com>
--      Mark J Crane <markjcrane@fusionpbx.com>
--[[
This module provides for Blacklisting of phone numbers. Essentially these are numbers that you do not want to hear from again!

To call this script and pass it arguments:
1. On the command line, e.g. in a FS incoming dialplan: <action application="lua" data="call_block.lua C"/>
This method causes the script to get its manadatory arguments directly from the Session
]]
--[[ Change Log:
	15 Jun, 2011: initial release > FusionPBX
	15 Jun, 2011: Added loglevel parameter and logger function to simplify control of debug output
	4 May, 2012: tested with FusionPBX V3
	4 May, 2012: added per_tenant capability (domain based)
	12 Jun, 2013: update the database connection, change table name from v_callblock to v_call_block
	14 Jun, 2013: Change Voicemail option to use Transfer, avoids mod_voicemail dependency
	27 Sep, 2013: Changed the name of the fields to conform with the table name
]]

-- Command line parameters
	local	params = {	cmd = "",
						cid_num = string.gsub(tostring(session:getVariable("caller_id_number")), "+", ""),
						cid_name = session:getVariable("caller_id_name"),
						domain = session:getVariable("domain"),
						userid = "", -- session:getVariable("id")
						loglevel = "W" -- Warning, Debug, Info
						}

-- local storage
	local sql = nil

--define the logger function
	local function logger(level, log, data)
		-- output data to console 'log' if debug level is on
		if string.find(params["loglevel"], level) then
			freeswitch.consoleLog(log, "[Call Block]: " .. data .. "\n")
		end
	end

--connect to the database
	dofile(scripts_dir.."/resources/functions/database_handle.lua");
	dbh = database_handle('system');

--log if not connect 
	if dbh:connected() == false then
		logger("W", "NOTICE", "db was not connected")
	end

-- We have a single command letter
-- Use session variables
	logger("D", "NOTICE", "params default from session, count " .. string.format("%d", #argv[1]) .. " \n")
	params["cmd"] = argv[1]

-- ensure that we have a fresh status on exit
	session:setVariable("call_block", "")

--send to the log
	logger("D", "NOTICE", "params are: " .. string.format("'%s', '%s', '%s', '%s'", params["cid_num"], 
			params["cid_name"], params["userid"], params["domain"]));

--Check if number is in call_block list
	--	If it is, then increment the counter and block the call
	if (params["cmd"] == "C") then
		sql = "SELECT * FROM v_call_block as c "
		sql = sql .. "JOIN v_domains as d ON c.domain_uuid=d.domain_uuid "
		sql = sql .. "WHERE c.call_block_number = '" .. params["cid_num"] .. "' AND d.domain_name = '" .. params["domain"] .."'"
		status = dbh:query(sql, function(rows)
			found_cid_num = rows["call_block_number"]
			found_uuid = rows["call_block_uuid"]
			found_enabled = rows["call_block_enabled"]
			found_action = rows["call_block_action"]
			found_count = rows["call_block_count"]
			end)
		-- dbh:affected_rows() doesn't do anything if using core:db so this is the workaround:
		if found_cid_num then	-- caller id exists
			if (found_enabled == "true") then
				details = {}
				k = 0
				for v in string.gmatch(found_action, "[%w%.]+") do
					details[k] = v
					--logger("W", "INFO", "Details: " .. details[k])
					k = k + 1
				end
				dbh:query("UPDATE v_call_block SET call_block_count = " .. found_count + 1 .. " WHERE call_block_uuid = '" .. found_uuid .. "'")
				session:setVariable("call_block", "block")
				logger("W", "NOTICE", "number " .. params["cid_num"] .. " blocked with " .. found_count .. " previous hits, domain: " .. params["domain"])
				if (found_action == "Reject") then
					session:hangup("CALL_REJECTED")
				end
				if (found_action == "Busy") then
					session:hangup("USER_BUSY")
				end
				if (details[0] =="Voicemail") then
					session:setAutoHangup(false)
					session:execute("transfer", "*99" .. details[2] .. " XML  " .. details[1])
				end
			end
		end
	end