-- acf model for displaying logfiles recusivly 
module (..., package.seeall)

-- no initializer in model - use controller.init for that

require("posix")
require("fs")

local function get_version()
	local cmd = "snort -V 2>&1 | grep Version | sed 's/.*ersion\ /snort-/'"
	local cmd_output = io.popen( cmd )
	local cmd_output_result = cmd_output:read("*a") or ""
	cmd_output:close()
	return cmd_output_result
end

local is_running = function( process )
	local statusreport = nil
	local cmdoutput = {}
	local cmd, error = io.popen("pidof " .. process ,r)
	local cmdoutput = string.gsub(cmd:read("*a"), "%s", "")
	cmd:close()
	if (cmdoutput ~= "") then
		statusreport = "Running"
	else
		statusreport = "Stopped"
	end
	return statusreport
end

-- ################################################################################
-- PUBLIC FUNCTIONS

getstatus = function (self)
	local status = {}
	local version = get_version()
	status.version = version
	local isrunning = is_running("snort")
	status.status = isrunning
	return status
end

service_control = function ( self, srvcmd ) 
	local srvcmd = string.lower(srvcmd)
	local retval = ""
	local line = ""
	if (srvcmd == "start") or (srvcmd == "stop") or (srvcmd == "restart") then
		local file = io.popen( "PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin /etc/init.d/snort " .. srvcmd .. " 2>&1" )
		if file ~= nil then
			line = file:read( "*l" )
			while line ~= nil do
				retval = retval .. "\n" .. line
				line = file:read( "*l" )
			end
			file:close()
		end
	else
		retval = "Unknown command!"
	end
	return retval
end

read_alert = function ()
	local alertfile = "/var/log/snort/alert"
	local alertcount = 0
	local alertpriority = {}
	local alertprioritytmp = ""
	local priority = ""
	local classification = ""
	local currid = ""
	local prevrid = ""
	local count = {}
	local liboutput = fs.read_file_as_array(alertfile)
	if (liboutput) then
		for k,v in ipairs(liboutput) do
			--DEBUG
			--if (k == 1) then break end
			currid = string.match(v, "^.*%[%*%*%]%s*%[(%d+:%d+:%d+)%].*")
			if (currid) then
				local priority = string.match(liboutput[k+1],"^.*%[.*lassification:%s*.*%]%s*%[(.*)%]") or "Priority: Unknown"
				local classification = string.match(liboutput[k+1],"^.*%[.*lassification:%s*(.*)%]%s*%[") or "Classification: Unknown"
				if (alertpriority[priority] == nil) then
					alertpriority[priority] = {}
				end
				if (alertpriority[priority][classification] == nil) then
					alertpriority[priority][classification] = {}
				end
				alertpriority[priority][classification][currid] = {}
				if (alertpriority[priority][classification][currid]["value"] == nil) then
					alertpriority[priority][classification][currid]["value"] = {}
				end
				-- COUNTER
				if not (count[priority..classification..currid]) then
					count[priority..classification..currid] = 0
				end
				count[priority..classification..currid] = count[priority..classification..currid] + 1
				alertpriority[priority][classification][currid]["count"] = count[priority..classification..currid]
				for i=0, 10 do
					local rowvalue = liboutput[k+i]
					if (rowvalue == "") then
						break 
					end
					if (rowvalue) then
						table.insert(alertpriority[priority][classification][currid]["value"],rowvalue)
					end
				end
				alertcount = alertcount + 1
			end
		end
	end
	return alertcount,alertpriority
end