Lua Directory example
About
Takes input of the first 3 chars of a FreeSWITCH user's last name and lets the caller choose which returned result to connect. You will need mod_lua working for this.
Example
-- directory.lua
-- written by Brian Snipes <bsnipes_@_snipes.org>
-- on 2008/07/03
-- Purpose
-- to create a 'directory' app that takes input of the first 3 chars of a persons last name
-- and lets the user choose which returned result to transfer to
-- Notes
-- inside the custom_sounds_path are 5 sound files taken from an * box and converted to wav
-- FS currently has no equivalent of these files
-- the files are: dir-instr.wav dir-intro-fn.wav dir-intro.wav dir-nomatch.wav dir-nomore.wav
-- the following must be set correctly
-- used for logging info
script_name = "directory.lua"
-- extension the script runs on... we call back to this if no matches
directory_extension = 799
custom_sounds_path = "/usr/local/freeswitch/sounds/custom/"
voicemail_path = "/usr/local/freeswitch/storage/voicemail/default/192.168.5.4/"
-- the 'names' table contains names in a CamelCase format with the first and last names separated
-- by an underscore
-- the table contains only dictionary entries
-- the key is the name and the value is the extension number
names = {
Ash_George= 1001,
Jones_Jerry= 1002,
Smith_John= 1003
}
-- the following are used to generate digits sequences for the name/extension lookup
alphabet = "abcdefghijklmnopqrstuvwxyz"
numbers = "22233344455566677778889999"
-- function used to check for the existence of a file
-- returns true if fname exists
function exists(fname)
local f = io.open(fname, "r")
if (f and f:read()) then return true end
end
-- function used to spell a name letter by letter
function sayname(full_name)
-- find the center space then reverse the first and last names
middle = string.find(full_name, ' ')
first_name = string.sub(full_name, middle + 1, string.len(full_name))
last_name = string.sub(full_name, 1, middle -1)
freeswitch.consoleLog("info", script_name .. " : Now spelling out " .. first_name .. " " .. last_name .. "\n")
session:execute("phrase", "spell," .. first_name .. " " .. last_name);
end
-- function used to check if an extension already has a recorded name
function checkforname(extension)
--check the actual voicemail directory for recorded_name.wav
vmpath = voicemail_path .. extension .. "/recorded_name.wav"
if exists(vmpath) then
freeswitch.consoleLog("info", script_name .. " : recorded_name.wav for " .. extension .. " exists.\n")
return vmpath
else
freeswitch.consoleLog("info", script_name .. " : recorded_name.wav for " .. extension .. " does not exist.\n")
return false
end
end
-- create an all lowercase names table
lower_names = {}
for k,v in pairs(names)
do
lower_names[string.lower(k)] = v
end
-- create lookup tables
code_to_names = {}
for k,v in pairs(lower_names)
do
first_three_chars = string.sub(k, 1, 3)
code = ""
-- for each char in first_three_chars find the matching number
for i=1,3
do
code = code .. string.sub(numbers, string.find(alphabet, string.sub(first_three_chars,i,i)))
end
-- at this point code will be 3 numbers
-- see if the 3 digits are in our lookup table or not
if code_to_names[code] == nil then
code_to_names[code] = { k }
else
table.insert(code_to_names[code], k)
end
end
-- code_to_names will look like the following at this point
-- code_to_names[566]={ "jones_jerry" }
-- next we need to start the session and play the greeting
session:answer()
session:execute( "sleep", "2000" )
freeswitch.consoleLog("info", script_name .. " : playing intro message and waiting for digits.\n")
digits = session:playAndGetDigits(3, 3, 10, 5000, "*#", custom_sounds_path .. "dir-intro.wav", "", "");
-- log to console what was input
freeswitch.consoleLog("info", script_name .. " : captured the following digits - " .. digits .. "\n")
-- if it was 3 digits then process it
if (string.len(digits) == 3) then
if (code_to_names[digits] ~= nil) then -- we have matches
freeswitch.consoleLog("info", script_name .. " : found " .. digits .. " in the code_to_names table\n")
-- sort the table so it comes out in good order
table.sort(code_to_names[digits])
-- get the # of items in code_to_names[digits]
for count = 1,table.getn(code_to_names[digits])
do
freeswitch.consoleLog("info", script_name .. " : processing match found for " .. digits .. ". It is ".. code_to_names[digits][count] .. "\n")
full_name = string.gsub(code_to_names[digits][count], "_", " ")
extension = lower_names[code_to_names[digits][count]]
recorded_name = checkforname(extension)
if (recorded_name == false) then
sayname(full_name)
else
freeswitch.consoleLog("info", script_name .. " : playing the recorded_name.wav for extension " .. extension .. "\n")
session:streamFile(recorded_name)
end
session:execute("phrase", "spell," .. extension)
session:execute( "sleep", "1000" )
-- give the option press 1 to accept this person or * to go to the next
freeswitch.consoleLog("info", script_name .. " : playing 'press 1 or *' acceptance message and waiting for digit\n")
accept_digit = session:playAndGetDigits(1, 1, 3, 2000, "#", custom_sounds_path .. "dir-instr.wav", "", "")
freeswitch.consoleLog("info", script_name .. " : acceptance digit is " .. accept_digit .. "\n")
if (accept_digit == "1") then
accepted_extension = true
session:transfer(extension, "XML", "default")
break
end
end
-- we've played them all and if nothing was accepted
-- play the nomore matches wav and transfer back to the ivr
if (accepted_extension ~= true) then
freeswitch.consoleLog("info", script_name .. " : no more matches found. playing message and transferring back to directory\n")
session:streamFile( custom_sounds_path .. "dir-nomatch.wav" )
session:transfer(directory_extension, "XML", "default")
end
else
-- no matches found at all
-- transfer back when done
freeswitch.consoleLog("info", script_name .. " : did not find " .. digits .. " in the code_to_names table\n")
freeswitch.consoleLog("info", script_name .. " : transferring back to directory\n")
session:streamFile( custom_sounds_path .. "dir-nomatch.wav" )
session:transfer(directory_extension, "XML", "default")
end
end