1# frozen_string_literal: true
2
3require_relative "expiring_lock"
4
5class BillPlanCommand
6 def self.for(customer)
7 return ForUnregistered.new(customer) unless customer.registered?
8
9 unless customer.balance >= customer.monthly_price
10 return ForLowBalance.new(customer)
11 end
12
13 new(customer)
14 end
15
16 def initialize(customer)
17 @customer = customer
18 end
19
20 def reload_customer(db)
21 @customer = Command.execution.customer_repo.with(db: db)
22 .find(customer_id).sync
23 end
24
25 def call
26 ExpiringLock.new("jmp_customer_bill_plan-#{customer_id}").with {
27 @customer.bill_plan(note: "Renew account plan") { |db|
28 reload_customer(db).balance > @customer.monthly_price
29 }
30 }.then do |billed|
31 Command.reply do |reply|
32 reply.note_type = billed ? :info : :error
33 reply.note_text = "#{customer_id}#{billed ? '' : ' not'} billed"
34 end
35 end
36 end
37
38protected
39
40 def customer_id
41 @customer.customer_id
42 end
43
44 class ForLowBalance
45 def initialize(customer)
46 @customer = customer
47 end
48
49 def call
50 LowBalance.for(@customer).then(&:notify!).then do |amount|
51 next command_for(amount).call if amount&.positive?
52
53 notify_failure
54 Command.reply do |reply|
55 reply.note_type = :error
56 reply.note_text = "#{@customer.customer_id} balance is too low"
57 end
58 end
59 end
60
61 protected
62
63 def notify_failure
64 m = Blather::Stanza::Message.new
65 m.from = CONFIG[:notify_from]
66 m.body =
67 "Failed to renew account for #{@customer.registered?.phone}. " \
68 "To keep your number, please buy more credit soon."
69 @customer.stanza_to(m)
70 end
71
72 def command_for(amount)
73 BillPlanCommand.for(
74 @customer.with_balance(@customer.balance + amount)
75 )
76 end
77 end
78
79 class ForUnregistered
80 def initialize(customer)
81 @customer = customer
82 end
83
84 def call
85 Command.reply do |reply|
86 reply.note_type = :error
87 reply.note_text = "#{@customer.customer_id} is not registered"
88 end
89 end
90 end
91end