1# frozen_string_literal: true
2
3require_relative "churnbuster"
4require_relative "credit_card_sale"
5require_relative "expiring_lock"
6require_relative "transaction"
7
8class LowBalance
9 def self.for(customer, transaction_amount=0)
10 locked_if_no_services(customer).then do |locked|
11 locked || ExpiringLock.new(
12 "jmp_customer_low_balance-#{customer.billing_customer_id}",
13 expiry: 60 * 60 * 24 * 7
14 ).with(-> { Locked.new }) do
15 customer.billing_customer.then do |billing_customer|
16 for_no_lock(billing_customer, transaction_amount)
17 end
18 end
19 end
20 end
21
22 def self.locked_if_no_services(customer)
23 return if customer.registered?
24
25 DB.query_defer(
26 "SELECT COUNT(*) AS c FROM sims WHERE customer_id=$1",
27 [customer.customer_id]
28 ).then do |result|
29 next if result.first["c"].to_i.positive?
30
31 Locked.new
32 end
33 end
34
35 def self.for_no_lock(customer, transaction_amount, auto: true)
36 if auto && customer.auto_top_up_amount.positive?
37 AutoTopUp.for(customer, transaction_amount)
38 else
39 customer.btc_addresses.then do |btc_addresses|
40 new(customer, btc_addresses, transaction_amount)
41 end
42 end
43 end
44
45 def initialize(customer, btc_addresses, transaction_amount=0)
46 @customer = customer
47 @btc_addresses = btc_addresses
48 @transaction_amount = transaction_amount
49 end
50
51 def can_top_up?
52 false
53 end
54
55 def notify!
56 m = Blather::Stanza::Message.new
57 m.from = CONFIG[:notify_from]
58 m.body =
59 "Your balance of $#{'%.4f' % @customer.balance} is low." \
60 "#{pending_cost_for_notification}" \
61 "#{btc_addresses_for_notification}"
62 @customer.stanza_to(m)
63 EMPromise.resolve(0)
64 end
65
66 def pending_cost_for_notification
67 return unless @transaction_amount&.positive?
68 return unless @transaction_amount > @customer.balance
69
70 "\nYou need an additional " \
71 "$#{'%.2f' % (@transaction_amount - @customer.balance)} "\
72 "to complete this transaction."
73 end
74
75 def btc_addresses_for_notification
76 return if @btc_addresses.empty?
77
78 "\nYou can buy credit by sending any amount of Bitcoin to one of " \
79 "these addresses:\n#{@btc_addresses.join("\n")}"
80 end
81
82 class AutoTopUp
83 def self.for(customer, target=0)
84 customer.payment_methods.then(&:default_payment_method).then do |method|
85 blocked?(method).then do |block|
86 next AutoTopUp.new(customer, method, target) if block.zero?
87
88 log.info("#{customer.customer_id} auto top up blocked")
89 LowBalance.for_no_lock(customer, target, auto: false)
90 end
91 end
92 end
93
94 def self.blocked?(method)
95 return EMPromise.resolve(1) if method.nil?
96
97 REDIS.exists(
98 "jmp_auto_top_up_block-#{method&.unique_number_identifier}"
99 )
100 end
101
102 def initialize(customer, method=nil, target=0, margin: 10)
103 @customer = customer
104 @method = method
105 @target = target
106 @margin = margin
107 @message = Blather::Stanza::Message.new
108 @message.from = CONFIG[:notify_from]
109 end
110
111 def top_up_amount
112 [
113 ((@target + @margin) - @customer.balance).round(2),
114 @customer.auto_top_up_amount
115 ].max
116 end
117
118 def can_top_up?
119 true
120 end
121
122 def sale
123 CreditCardSale.create(@customer, amount: top_up_amount)
124 end
125
126 def churnbuster(e)
127 return unless e.is_a?(BraintreeFailure)
128
129 Churnbuster.new.failed_payment(
130 @customer,
131 top_up_amount,
132 e.response.transaction.id
133 )
134 end
135
136 def failed(e)
137 churnbuster(e)
138 @method && REDIS.setex(
139 "jmp_auto_top_up_block-#{@method.unique_number_identifier}",
140 60 * 60 * 24 * 30,
141 Time.now
142 )
143 @message.body =
144 "Automatic top-up transaction for " \
145 "$#{'%.2f' % top_up_amount} failed: #{e.message}"
146 0
147 end
148
149 def notify!
150 sale.then { |tx|
151 @message.body =
152 "Automatic top-up has charged your default " \
153 "payment method and added #{tx} to your balance."
154 tx.total
155 }.catch(&method(:failed)).then { |amount|
156 @customer.stanza_to(@message)
157 amount
158 }
159 end
160 end
161
162 class Locked
163 def notify!
164 EMPromise.resolve(0)
165 end
166 end
167end