1# frozen_string_literal: true
2
3require "digest"
4require "forwardable"
5require "multibases"
6require "multihashes"
7require "roda"
8require "thin"
9require "sentry-ruby"
10
11require_relative "lib/call_attempt_repo"
12require_relative "lib/cdr"
13require_relative "lib/cdr_repo"
14require_relative "lib/oob"
15require_relative "lib/rev_ai"
16require_relative "lib/roda_capture"
17require_relative "lib/roda_em_promise"
18require_relative "lib/rack_fiber"
19require_relative "lib/reachability_repo"
20
21class OGMDownload
22 def initialize(url)
23 @digest = Digest::SHA512.new
24 @f = Tempfile.open("ogm")
25 @req = EM::HttpRequest.new(url, tls: { verify_peer: true })
26 end
27
28 def download
29 http = @req.aget
30 http.stream do |chunk|
31 @digest << chunk
32 @f.write chunk
33 end
34 http.then { @f.close }.catch do |e|
35 @f.close!
36 EMPromise.reject(e)
37 end
38 end
39
40 def cid
41 Multibases.encode(
42 "base58btc",
43 [1, 85].pack("C*") + Multihashes.encode(@digest.digest, "sha2-512")
44 ).pack.to_s
45 end
46
47 def path
48 @f.path
49 end
50end
51
52# rubocop:disable Metrics/ClassLength
53class Web < Roda
54 use Rack::Fiber unless ENV["ENV"] == "test" # Must go first!
55 use Sentry::Rack::CaptureExceptions
56 plugin :json_parser
57 plugin :type_routing
58 plugin :public
59 plugin :render, engine: "slim"
60 plugin RodaCapture
61 plugin RodaEMPromise # Must go last!
62
63 class << self
64 attr_reader :customer_repo, :log, :outbound_transfers
65
66 def run(log, *listen_on)
67 plugin :common_logger, log, method: :info
68 @outbound_transfers = {}
69 Thin::Logging.logger = log
70 Thin::Server.start(
71 *listen_on,
72 freeze.app,
73 signals: false
74 )
75 end
76 end
77
78 extend Forwardable
79 def_delegators :'self.class', :outbound_transfers
80 def_delegators :request, :params
81
82 def log
83 opts[:common_logger]
84 end
85
86 def log_error(e)
87 log.error(
88 "Error raised during #{request.fullpath}: #{e.class}",
89 e,
90 loggable_params
91 )
92 if e.is_a?(::Exception)
93 Sentry.capture_exception(e)
94 else
95 Sentry.capture_message(e.to_s)
96 end
97 end
98
99 def loggable_params
100 params.dup.tap do |p|
101 p.delete("to")
102 p.delete("from")
103 end
104 end
105
106 def customer_repo(**kwargs)
107 kwargs[:set_user] = Sentry.method(:set_user) unless kwargs[:set_user]
108 opts[:customer_repo] || CustomerRepo.new(**kwargs)
109 end
110
111 def reachability_repo(**kwargs)
112 opts[:reachability_repo] || ReachabilityRepo::Voice.new(**kwargs)
113 end
114
115 def find_by_tel_with_fallback(sgx_repo:, **kwargs)
116 customer_repo(sgx_repo: sgx_repo).find_by_tel(params["to"]).catch { |e|
117 next EMPromise.reject(e) if e.is_a?(CustomerRepo::NotFound)
118
119 log_error(e)
120 customer_repo(
121 sgx_repo: TrivialBackendSgxRepo.new(**kwargs)
122 ).find_by_tel(params["to"])
123 }
124 end
125
126 def call_attempt_repo
127 opts[:call_attempt_repo] || CallAttemptRepo.new
128 end
129
130 def cdr_repo
131 opts[:cdr_repo] || CDRRepo.new
132 end
133
134 def rev_ai
135 RevAi.new(logger: log.child(loggable_params))
136 end
137
138 TEL_CANDIDATES = {
139 "Restricted" => "14",
140 "anonymous" => "15",
141 "Anonymous" => "16",
142 "unavailable" => "17",
143 "Unavailable" => "18"
144 }.freeze
145
146 def sanitize_tel_candidate(candidate)
147 if candidate.length < 3
148 "13;phone-context=anonymous.phone-context.soprani.ca"
149 elsif candidate[0] == "+" && /\A\d+\z/.match(candidate[1..-1])
150 candidate
151 else
152 "#{TEL_CANDIDATES.fetch(candidate, '19')}" \
153 ";phone-context=anonymous.phone-context.soprani.ca"
154 end
155 end
156
157 def from_jid
158 Blather::JID.new(
159 sanitize_tel_candidate(params["from"]),
160 CONFIG[:component][:jid]
161 )
162 end
163
164 def inbound_calls_path(suffix, customer_id=nil, call_id: nil)
165 [
166 "/inbound/calls/#{call_id || params['callId']}",
167 suffix
168 ].compact.join("/") +
169 (customer_id ? "?customer_id=#{customer_id}" : "")
170 end
171
172 def url(path)
173 "#{request.base_url}#{path}"
174 end
175
176 def modify_call(call_id)
177 body = Bandwidth::ApiModifyCallRequest.new
178 yield body
179 BANDWIDTH_VOICE.modify_call(
180 CONFIG[:creds][:account],
181 call_id,
182 body: body
183 )
184 rescue Bandwidth::APIException
185 # If call does not exist, don't need to hang up or send to voicemail
186 # Other side must have hung up already
187 raise $! unless [404, 409].include?($!.response_code)
188 end
189
190 def start_transcription(customer, call_id, media_url)
191 return unless customer.transcription_enabled
192
193 rev_ai.language_id(
194 media_url,
195 url(inbound_calls_path("voicemail/language_id", call_id: call_id)),
196 from_jid: from_jid,
197 customer_id: customer.customer_id
198 )
199 end
200
201 def call_inputs(customer, from, call_id)
202 EMPromise.all([
203 customer.customer_id, customer.fwd,
204 call_attempt_repo.find_inbound(customer, from, call_id: call_id)
205 ])
206 end
207
208 def create_call(customer, from, call_id, application_id)
209 call_inputs(customer, from, call_id).then do |(customer_id, fwd, ca)|
210 ca.create_call(fwd, CONFIG[:creds][:account]) do |cc|
211 cc.from = from
212 cc.application_id = application_id
213 cc.answer_url = url inbound_calls_path(nil, customer_id)
214 cc.disconnect_url = url(
215 inbound_calls_path(:transfer_complete, customer_id)
216 )
217 end
218 end
219 end
220
221 route do |r|
222 r.on "inbound" do
223 r.on "calls" do
224 r.post "status" do
225 if params["eventType"] == "disconnect"
226 if (outbound_leg = outbound_transfers.delete(params["callId"]))
227 modify_call(outbound_leg) do |call|
228 call.state = "completed"
229 end
230 end
231
232 customer_repo.find_by_tel(params["to"]).then do |customer|
233 cdr_repo.put(CDR.for_inbound(customer.customer_id, params))
234 end
235 end
236 "OK"
237 end
238
239 r.on :call_id do |call_id|
240 r.post "transfer_complete" do
241 outbound_leg = outbound_transfers.delete(call_id)
242 if params["cause"] == "hangup" && params["tag"] == "connected"
243 log.info "Normal hangup, now end #{call_id}", loggable_params
244 modify_call(call_id) { |call| call.state = "completed" }
245 elsif !outbound_leg
246 log.debug "Inbound disconnected", loggable_params
247 else
248 log.debug "Go to voicemail", loggable_params
249 modify_call(call_id) do |call|
250 call.redirect_url = url inbound_calls_path(:voicemail)
251 end
252 end
253 ""
254 end
255
256 r.on "voicemail" do
257 r.post "audio" do
258 duration = Time.parse(params["endTime"]) -
259 Time.parse(params["startTime"])
260 next "OK<5" unless duration > 5
261
262 jmp_media_url = params["mediaUrl"].sub(
263 /\Ahttps:\/\/voice.bandwidth.com\/api\/v2\/accounts\/\d+/,
264 "https://jmp.chat"
265 )
266
267 find_by_tel_with_fallback(
268 sgx_repo: Bwmsgsv2Repo.new,
269 transcription_enabled: false
270 ).then do |customer|
271 start_transcription(customer, call_id, jmp_media_url)
272
273 m = Blather::Stanza::Message.new
274 m.chat_state = nil
275 m.from = from_jid
276 m.subject = "New Voicemail"
277 m << OOB.new(jmp_media_url)
278 customer.stanza_to(m)
279
280 "OK"
281 end
282 end
283
284 r.post "language_id" do
285 rev_ai.language_id_result(params).then { |result|
286 rev_ai.stt(
287 result["top_language"],
288 result.dig("metadata", "media_url"),
289 url(inbound_calls_path(
290 "voicemail/transcription",
291 call_id: call_id
292 )),
293 **result["metadata"].transform_keys(&:to_sym)
294 ).then { "OK" }
295 }.catch_only(RevAi::Failed) { |e|
296 log_error(e)
297 "Failure logged"
298 }
299 end
300
301 r.post "transcription" do
302 rev_ai.stt_result(params, request.url).then { |result|
303 next "OK" if result["text"].to_s.empty?
304
305 customer_repo.find(
306 result.dig("metadata", "customer_id")
307 ).then do |customer|
308 m = Blather::Stanza::Message.new
309 m.chat_state = nil
310 m.from = result.dig("metadata", "from_jid")
311 m.subject = "Voicemail Transcription"
312 m.body = result["text"]
313 customer.stanza_to(m)
314
315 "OK"
316 end
317 }.catch_only(RevAi::Failed) { |e|
318 log_error(e)
319 "Failure logged"
320 }
321 end
322
323 r.post do
324 find_by_tel_with_fallback(
325 sgx_repo: Bwmsgsv2Repo.new,
326 ogm_url: nil
327 ).then { |c|
328 c.ogm(params["from"]) if c.fwd.voicemail_enabled?
329 }.then { |ogm|
330 next render :hangup unless ogm
331
332 render :voicemail, locals: { ogm: ogm }
333 }.catch_only(CustomerRepo::NotFound) {
334 render "inbound/no_customer"
335 }
336 end
337 end
338
339 r.post do
340 customer_repo(
341 sgx_repo: Bwmsgsv2Repo.new
342 ).find(params.fetch("customer_id")).then do |customer|
343 call_attempt_repo.find_inbound(
344 customer,
345 params["from"],
346 call_id: call_id,
347 digits: params["digits"]
348 ).then { |ca| render(*ca.to_render) }
349 end
350 end
351 end
352
353 r.post do
354 customer_repo(
355 sgx_repo: Bwmsgsv2Repo.new
356 ).find_by_tel(params["to"]).then { |customer|
357 reachability_repo.find(customer, params["from"]).then do |reach|
358 reach.filter(if_yes: ->(_) { render :hangup }) do
359 create_call(
360 customer,
361 params["from"],
362 params["callId"],
363 params["applicationId"]
364 ).then { |call|
365 next EMPromise.reject(:voicemail) unless call
366
367 outbound_transfers[params["callId"]] = call
368 render :ring, locals: { duration: 300 }
369 }
370 end
371 end
372 }.catch_only(CustomerFwd::InfiniteTimeout) { |e|
373 render :forward, locals: { fwd: e.fwd, from: params["from"] }
374 }.catch { |e|
375 log_error(e) unless e == :voicemail
376 render :redirect, locals: { to: inbound_calls_path(:voicemail) }
377 }
378 end
379 end
380 end
381
382 r.on "outbound" do
383 r.on "calls" do
384 r.post "status" do
385 log.info "#{params['eventType']} #{params['callId']}", loggable_params
386 if params["eventType"] == "disconnect"
387 customer_id = params["from"].sub(/^(?:\+|c)/, "")
388 customer_id = from.sub(/^1/, "") if customer_id.length > 10
389 call_attempt_repo.ending_call(customer_id, params["callId"])
390 cdr_repo
391 .put(CDR.for_outbound(customer_id, params))
392 .catch(&method(:log_error))
393 end
394 "OK"
395 end
396
397 r.post do
398 from = params["from"].sub(/^(?:\+|c)/, "")
399 from = from.sub(/^1/, "") if from.length > 10
400 customer_repo(
401 sgx_repo: Bwmsgsv2Repo.new
402 ).find_by_format(from).then { |c|
403 call_attempt_repo.find_outbound(
404 c,
405 params["to"],
406 call_id: params["callId"],
407 digits: params["digits"]
408 ).then do |ca|
409 r.json { ca.to_json }
410
411 call_attempt_repo.starting_call(c, params["callId"])
412 render(*ca.to_render)
413 end
414 }.catch_only(CustomerRepo::NotFound) {
415 render "outbound/no_customer"
416 }
417 end
418 end
419 end
420
421 r.on "ogm" do
422 r.post "start" do
423 render :record_ogm, locals: { customer_id: params["customer_id"] }
424 end
425
426 r.post do
427 jmp_media_url = params["mediaUrl"].sub(
428 /\Ahttps:\/\/voice.bandwidth.com\/api\/v2\/accounts\/\d+/,
429 "https://jmp.chat"
430 )
431 ogm = OGMDownload.new(jmp_media_url)
432 ogm.download.then do
433 File.rename(ogm.path, "#{CONFIG[:ogm_path]}/#{ogm.cid}")
434 File.chmod(0o644, "#{CONFIG[:ogm_path]}/#{ogm.cid}")
435 customer_repo.find(params["customer_id"]).then do |customer|
436 customer.set_ogm_url("#{CONFIG[:ogm_web_root]}/#{ogm.cid}.mp3")
437 end
438 end
439 end
440 end
441
442 r.public
443 end
444end
445# rubocop:enable Metrics/ClassLength