Add membership lapse warning email, 7 days before suspension

bin/reconcile.rb

@@ -23,6 +23,13 @@ def send_email(address, subject, text)
   mail.deliver
 end
 
+def send_lapse_warning_email(email, full_name, last_payment)
+  vars = {'name' => firstname(full_name),
+          'date' => last_payment.strftime('%Y-%m-%d')}
+  template = Erubis::Eruby.new(File.read('../emails/lapse_warning.erb'))
+  send_email(email, "Your London Hackspace membership will lapse in 7 days", template.result(vars))
+end
+
 def send_unsubscribe_email(email, full_name, last_payment)
   vars = {'name' => firstname(full_name),
           'date' => last_payment.strftime('%Y-%m-%d')}
@@ -97,6 +104,19 @@ def send_subscribe_email(email, full_name)
     end
 end
 
+db.exec("SELECT users.*, (SELECT max(timestamp) FROM transactions WHERE user_id = users.id) AS lastsubscription
+            FROM users
+            WHERE users.subscribed = true
+            AND (SELECT max(timestamp) FROM transactions WHERE user_id = users.id) < now() - interval '1 month' - interval '7 days'
+            AND (SELECT max(timestamp) FROM transactions WHERE user_id = users.id) > now() - interval '1 month' - interval '8 days'"
+            ) do |result|
+
+    result.each do |user|
+      puts "Warning #{user['full_name']} of membership soon to lapse"
+      send_lapse_warning_email(user['email'], user['full_name'], Time.parse(user['lastsubscription']))
+    end
+end
+
 db.exec("SELECT users.*, (SELECT max(timestamp) FROM transactions WHERE user_id = users.id) AS lastsubscription
             FROM users
             WHERE users.subscribed = true

emails/lapse_warning.erb

@@ -0,0 +1,32 @@
+Dear <%=name%>,
+
+This is an automated email sent from our payment system.
+
+We haven't noticed a payment from you in over a month, and if we
+do not within 7 days your membership will be automatically suspended, and your
+door access will be disabled.
+
+We last received a payment from you on <%=date%>.
+
+If you believe we are warning you in error, please reply to this
+email with the date, amount, and reference of your most recent payment,
+and we'll look into it.
+
+If you've changed bank account or want to confirm our payment details and
+your reference you can find them on our web site:
+
+https://london.hackspace.org.uk/members/
+
+Alternatively if you are cancelling your membership we'd be very
+interested to hear any feedback you have about why you've cancelled your
+membership, or how we can improve London Hackspace - just hit reply and
+let us know.
+
+If you're still storing anything in the space, please arrange to remove
+it as soon as possible, otherwise we will have to dispose of it to free
+up space for other members to use.
+
+Thanks,
+
+The London Hackspace trustees
+[email protected]