From 23a079eca933def7b4086799c3ebec5dc4829e06 Mon Sep 17 00:00:00 2001
From: Stephen Paul Weber <singpolyma@singpolyma.net>
Date: Mon, 7 Feb 2022 16:08:49 -0500
Subject: [PATCH] Read out TTS

Wait for DTMF of 1 if there is somewhere to go afterwards.
---
 extensions.lua | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/extensions.lua b/extensions.lua
index 93043e6..b90b423 100644
--- a/extensions.lua
+++ b/extensions.lua
@@ -9,6 +9,14 @@ function uri_decode(uri)
 	return uri:gsub("%%(%x%x)", hex_to_char)
 end
 
+function prepare_tts(text)
+	local sha = channel.SHA1(text):get()
+	local handle = assert(io.popen("flite -voice /etc/asterisk/voice.flitevox -o /tmp/" .. sha .. ".wav16", "w"))
+	handle:write(text)
+	assert(handle:close())
+	return "/tmp/" .. sha
+end
+
 function call_sgx_jmp(from_jid, to)
 	local req = http_request.new_from_uri(
 		"https://bandwidth-voice.jmp.chat/outbound/calls"
@@ -37,6 +45,23 @@ extensions = {
 				local result = call_sgx_jmp(from_jid, extension)
 				channel.CDR("customer_id"):set(result.customer_id)
 
+				if result.tts then
+					local wav = prepare_tts(result.tts)
+
+					if result.from and result.to then
+						app.read("digits", wav, 1, nil, 3)
+					else
+						app.playback(wav)
+					end
+
+					os.remove(wav .. ".wav16")
+
+					if channel.digits:get() ~= "1" then
+						app.hangup()
+						return
+					end
+				end
+
 				if result.from and result.to then
 					channel.CALLERID("all"):set(result.from .. " <" .. result.from .. ">")
 					app.dial("SIP/bandwidth/" .. result.to)
-- 
2.45.2