--
--	FusionPBX
--	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 FusionPBX
--
--	The Initial Developer of the Original Code is
--	Mark J Crane <markjcrane@fusionpbx.com>
--	Copyright (C) 2010 - 2019
--	the Initial Developer. All Rights Reserved.
--
--	Contributor(s):
--	Mark J Crane <markjcrane@fusionpbx.com>

--set default variables
	max_tries = "3";
	digit_timeout = "5000";
	api = freeswitch.API();

--set the debug level
	debug["sql"] = false;
	debug["var"] = false;
	db_dial_string = "";
	db_extension_uuid = "";

--include config.lua
	require "resources.functions.config";

--connect to the database
	local Database = require "resources.functions.database";
	dbh = Database.new('system');

--include json library
	local json
	if (debug["sql"]) then
		json = require "resources.functions.lunajson"
	end

if ( session:ready() ) then
	session:answer();
	domain_uuid = session:getVariable("domain_uuid");
	pin_number = session:getVariable("pin_number");
	sounds_dir = session:getVariable("sounds_dir");
	sip_from_user = session:getVariable("sip_from_user");
	sip_from_host = session:getVariable("sip_from_host");
	direction = session:getVariable("direction"); --in, out, both
	extension = tostring(session:getVariable("extension")); --true, false
	user_name = tostring(session:getVariable("user_name"));
	context = session:getVariable("context");
	dial_string = tostring(session:getVariable("dial_string"));
	if (dial_string == "nil") then dial_string = ""; end

	--set the sounds path for the language, dialect and voice
		default_language = session:getVariable("default_language");
		default_dialect = session:getVariable("default_dialect");
		default_voice = session:getVariable("default_voice");
		if (not default_language) then default_language = 'en'; end
		if (not default_dialect) then default_dialect = 'us'; end
		if (not default_voice) then default_voice = 'callie'; end

	--get the unique_id
		min_digits = 1;
		max_digits = 15;
		unique_id = session:playAndGetDigits(min_digits, max_digits, max_tries, digit_timeout, "#", "phrase:voicemail_enter_id:#", "", "\\d+");

	--add the unique_id value to the dial_string
		if (string.len(dial_string) > 0) then
			dial_string = string.gsub(dial_string, '{v_unique_id}', unique_id);
		end

	--authenticate the user
		if (pin_number) then
			min_digits = string.len(pin_number);
			max_digits = string.len(pin_number)+1;
		else
			min_digits = 1;
			max_digits = 12;
		end
		caller_pin_number = session:playAndGetDigits(min_digits, max_digits, max_tries, digit_timeout, "#", "phrase:voicemail_enter_pass:#", "", "\\d+");

	--get the dial_string, and extension_uuid
		if (string.len(unique_id) > 0) then
			sql = "SELECT * FROM v_extensions as e, v_domains as d ";
			sql = sql .. "WHERE e.domain_uuid = d.domain_uuid ";
			local params = {unique_id = unique_id}
			if (extension == "true") then
				sql = sql .. "AND e.extension = :unique_id ";
				sql = sql .. "AND e.domain_uuid = :domain_uuid ";
				params.domain_uuid = domain_uuid
			else
				sql = sql .. "AND e.unique_id = :unique_id ";
			end
			if (debug["sql"]) then
				freeswitch.consoleLog("NOTICE", "[dial_string] SQL: ".. sql .. "; params: " .. json.encode(params) .. "\n");
			end
			dbh:query(sql, params, function(row)
				db_domain_uuid = row.domain_uuid;
				db_extension_uuid = row.extension_uuid;
				db_extension = row.extension;
				db_number_alias = row.number_alias;
				db_dial_string = row.dial_string;
				db_dial_user = row.dial_user;
				db_dial_domain = row.dial_domain;
			end);
		end

	--check to see if the pin number is correct
		if (pin_number) then
			if (pin_number ~= caller_pin_number) then
				--access denied
				db_extension_uuid = "";
			end
		else
			if (db_domain_uuid ~= nil) then
				sql = "SELECT * FROM v_voicemails ";
				sql = sql .. "WHERE domain_uuid = :domain_uuid ";
				sql = sql .. "AND voicemail_id = :voicemail_id ";
				local params = {domain_uuid = db_domain_uuid};
				if (tonumber(db_extension) == nil) then
					params.voicemail_id = db_number_alias;
				else
					params.voicemail_id = db_extension;
				end
				if (debug["sql"]) then
					freeswitch.consoleLog("NOTICE", "[dial_string] SQL: ".. sql .. "; params: " .. json.encode(params) .. "\n");
				end
				dbh:query(sql, params, function(row)
					voicemail_password = row.voicemail_password;
				end);
				if (voicemail_password ~= caller_pin_number) then
					--access denied
					db_extension_uuid = "";
				end
			end
		end

	--process the request
		if (string.len(db_extension_uuid) > 0) then
			--add the dial string
				if (direction == "in") then
					if (string.len(dial_string) == 0) then
						dial_string = [[{sip_invite_domain=]] .. sip_from_host .. [[,presence_id=]] .. sip_from_user .. [[@]] .. sip_from_host .. [[}${sofia_contact(]] .. sip_from_user .. [[@]] .. sip_from_host .. [[)}]];
					end
					sql = "UPDATE v_extensions SET ";
					sql = sql .. "dial_string = :dial_string, ";
					sql = sql .. "dial_user = :dial_user, ";
					sql = sql .. "dial_domain = :dial_domain ";
					sql = sql .. "WHERE extension_uuid = :extension_uuid ";
					local params = {
						dial_string = dial_string;
						dial_user = sip_from_user;
						dial_domain = sip_from_host;
						extension_uuid = db_extension_uuid;
					};
					if (debug["sql"]) then
						freeswitch.consoleLog("NOTICE", "[dial_string] SQL: ".. sql .. "; params: " .. json.encode(params) .. "\n");
					end
					dbh:query(sql, params);
					session:streamFile(sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/voicemail/vm-saved.wav");
				end
			--remove the dialstring
				if (direction == "out") then
					--if the the dial_string has a value then clear the dial string
					sql = "UPDATE v_extensions SET ";
					sql = sql .. "dial_string = null, ";
					sql = sql .. "dial_user = null, ";
					sql = sql .. "dial_domain = null ";
					sql = sql .. "WHERE extension_uuid = :extension_uuid ";
					local params = {extension_uuid = db_extension_uuid};
					if (debug["sql"]) then
						freeswitch.consoleLog("NOTICE", "[dial_string] SQL: ".. sql .. "; params: " .. json.encode(params) .. "\n");
					end
					dbh:query(sql, params);
					session:streamFile(sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/voicemail/vm-deleted.wav");
				end
			--toggle the dial string
				if (direction == "both") then
					if (string.len(db_dial_string) > 1) then
						--if the the dial_string has a value then clear the dial string
						sql = "UPDATE v_extensions SET ";
						sql = sql .. "dial_string = null, ";
						sql = sql .. "dial_user = null, ";
						sql = sql .. "dial_domain = null ";
						sql = sql .. "WHERE extension_uuid = :extension_uuid ";
						local params = {extension_uuid = db_extension_uuid};
						if (debug["sql"]) then
							freeswitch.consoleLog("NOTICE", "[dial_string] SQL: ".. sql .. "; params: " .. json.encode(params) .. "\n");
						end
						dbh:query(sql, params);
						session:streamFile(sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/voicemail/vm-deleted.wav");
					else
						--if the dial string is empty then set the dial string
						if (string.len(dial_string) == 0) then
							dial_string = [[{sip_invite_domain=]] .. sip_from_host .. [[,presence_id=]] .. sip_from_user .. [[@]] .. sip_from_host .. [[}${sofia_contact(]] .. sip_from_user .. [[@]] .. sip_from_host .. [[)}]];
						end
						sql = "UPDATE v_extensions SET ";
						sql = sql .. "dial_string = :dial_string, ";
						sql = sql .. "dial_user = :dial_user, ";
						sql = sql .. "dial_domain = :dial_domain ";
						sql = sql .. "WHERE extension_uuid = :extension_uuid ";
						local params = {
							dial_string = dial_string;
							dial_user = sip_from_user;
							dial_domain = sip_from_host;
							extension_uuid = db_extension_uuid;
						};
						if (debug["sql"]) then
							freeswitch.consoleLog("NOTICE", "[dial_string] SQL: ".. sql .. "; params: " .. json.encode(params) .. "\n");
						end
						dbh:query(sql, params);
						session:streamFile(sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/voicemail/vm-saved.wav");
					end
				end
		else
			session:streamFile("phrase:voicemail_fail_auth:#");
			session:hangup("NORMAL_CLEARING");
			return;
		end

	--clear the cache
		if (user_name ~= nil and context ~= nil) then
			if (cache.support()) then
				cache.del("directory:"..user_name.."@"..context);
				if #number_alias > 0 then
					cache.del("directory:"..number_alias.."@"..domain_name);
				end
			end
		end
		if (db_extension ~= nil and context ~= nil) then
			if (cache.support()) then
				cache.del("directory:"..db_extension.."@"..context);
				if #number_alias > 0 then
					cache.del("directory:"..number_alias.."@"..domain_name);
				end
			end
		end

	--log to the console
		if (debug["var"]) then
			if sip_from_host~=nil then
				freeswitch.consoleLog("NOTICE", "sip_from_host: ".. sip_from_host .. "\n");
			else
				freeswitch.consoleLog("NOTICE", "sip_from_host: NIL\n");
			end
			if extension_uuid~=nil then
				freeswitch.consoleLog("NOTICE", "extension_uuid: ".. extension_uuid .. "\n");
			else
			freeswitch.consoleLog("NOTICE", "extension_uuid: NIL\n");
			end
			if dial_string~=nil then
				freeswitch.consoleLog("NOTICE", "dial_string: ".. dial_string .. "\n");
			else
				freeswitch.consoleLog("NOTICE", "dial_string: NIL\n");
			end
		end

	--show call variables
		--session:execute("info", "");

end