--	xml_handler.lua
--	Part of FusionPBX
--	Copyright (C) 2013 - 2025 Mark J Crane <markjcrane@fusionpbx.com>
--	All rights reserved.
--
--	Redistribution and use in source and binary forms, with or without
--	modification, are permitted provided that the following conditions are met:
--
--	1. Redistributions of source code must retain the above copyright notice,
--	   this list of conditions and the following disclaimer.
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--	2. Redistributions in binary form must reproduce the above copyright
--	   notice, this list of conditions and the following disclaimer in the
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--include xml library
	local Xml = require "resources.functions.xml";

--get the cache
	local cache = require "resources.functions.cache"
	local directory_groups_key = "directory:groups:"..domain_name;
	XML_STRING, err = cache.get(directory_groups_key);

--set the cache
	if not XML_STRING then
		--connect to the database
			local Database = require "resources.functions.database";
			local dbh = Database.new('system');

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

		--exits the script if we didn't connect properly
			assert(dbh:connected());

		--get the domain_uuid
			if (domain_uuid == nil) then
				--get the domain_uuid
					if (domain_name ~= nil) then
						local sql = "SELECT domain_uuid FROM v_domains ";
						sql = sql .. "WHERE domain_name = :domain_name ";
						local params = {domain_name = domain_name};
						if (debug["sql"]) then
							freeswitch.consoleLog("notice", "[xml_handler] SQL: " .. sql .. "; params: " .. json.encode(params) .. "\n");
						end
						dbh:query(sql, params, function(rows)
							domain_uuid = rows["domain_uuid"];
						end);
					end
			end

			if not domain_uuid then
				freeswitch.consoleLog("warning", "[xml_handler] Can not find domain name: " .. tostring(domain_name) .. "\n");
				return
			end

		--build the call group array
			local sql = [[
			select * from v_extensions
			where domain_uuid = :domain_uuid
			enabled = true
			order by call_group asc
			]];
			local params = {domain_uuid = domain_uuid};
			if (debug["sql"]) then
				freeswitch.consoleLog("notice", "[xml_handler] SQL: " .. sql .. "; params: " .. json.encode(params) .. "\n");
			end
			call_group_array = {};
			dbh:query(sql, params, function(row)
				call_group = row['call_group'];
				--call_group = str_replace(";", ",", call_group);
				tmp_array = explode(",", call_group);
				for key,value in pairs(tmp_array) do
					value = trim(value);
					--freeswitch.consoleLog("notice", "[directory] Key: " .. key .. " Value: " .. value .. " " ..row['extension'] .."\n");
					if (string.len(value) == 0) then
						--do nothing
					else
						if (call_group_array[value] == nil) then
							call_group_array[value] = row['extension'];
						else
							call_group_array[value] = call_group_array[value]..','..row['extension'];
						end
					end
				end
			end);
			--for key,value in pairs(call_group_array) do
			--	freeswitch.consoleLog("notice", "[directory] Key: " .. key .. " Value: " .. value .. "\n");
			--end

		--build the xml array
			local xml = Xml:new();
			xml:append([[<?xml version="1.0" encoding="UTF-8" standalone="no"?>]]);
			xml:append([[<document type="freeswitch/xml">]]);
			xml:append([[	<section name="directory">]]);
			xml:append([[		<domain name="]] .. xml.sanitize(domain_name) .. [[">]]);
			xml:append([[		<groups>]]);
			previous_call_group = "";
			for key, value in pairs(call_group_array) do
				call_group = trim(key);
				extension_list = trim(value);
				if (string.len(call_group) > 0) then
					freeswitch.consoleLog("notice", "[directory] call_group: " .. call_group .. "\n");
					freeswitch.consoleLog("notice", "[directory] extension_list: " .. extension_list .. "\n");
					if (previous_call_group ~= call_group) then
						xml:append([[			<group name="]] .. xml.sanitize(call_group) .. [[">]]);
						xml:append([[				<users>]]);
						extension_array = explode(",", extension_list);
						for index,tmp_extension in pairs(extension_array) do
							xml:append([[					<user id="]] .. xml.sanitize(tmp_extension) .. [[" type="pointer"/>]]);
						end
						xml:append([[				</users>]]);
						xml:append([[			</group>]]);
					end
					previous_call_group = call_group;
				end
			end
			xml:append([[		</groups>]]);
			xml:append([[		</domain>]]);
			xml:append([[	</section>]]);
			xml:append([[</document>]]);
			XML_STRING = xml:build();

		--close the database connection
			dbh:release();

		--set the cache
			local ok, err = cache.set(directory_groups_key, XML_STRING, expire["directory"]);
			if debug["cache"] then
				if ok then
					freeswitch.consoleLog("notice", "[xml_handler] " .. directory_groups_key .. " stored in the cache\n");
				else
					freeswitch.consoleLog("warning", "[xml_handler] " .. directory_groups_key .. " can not be stored in the cache: " .. tostring(err) .. "\n");
				end
			end

		--send to the console
			if (debug["cache"]) then
				freeswitch.consoleLog("notice", "[xml_handler] directory:groups:"..directory_groups_key.." source: database\n");
			end

	else
		--replace the &#39 back to a single quote
			XML_STRING = XML_STRING:gsub("&#39;", "'");

		--send to the console
			if (debug["cache"]) then
				if (XML_STRING) then
					freeswitch.consoleLog("notice", "[xml_handler] "..directory_groups_key.." source: cache\n");
				end
			end
	end

--send the xml to the console
	if (debug["xml_string"]) then
		freeswitch.consoleLog("notice", "[xml_handler] directory:groups:"..domain_name.." XML_STRING: \n" .. XML_STRING .. "\n");
	end
