Set up sms reminders in Bangladesh from May to October (#5415)

**Story card:** [sc-12448]

This PR adds a data migration that uses our experiments feature to set
up SMS reminders in Bangladesh.

db/data/20240425072432_set_up_sms_reminders_bd_may_oct_2024.rb

@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+class SetUpSmsRemindersBdMayOct2024 < ActiveRecord::Migration[6.1]
+  EXPERIMENTS_DATA = %w[May Jun Jul Aug Sep Oct].map do |month|
+    {
+      current_experiment_name: "Current patients #{month} 2024",
+      stale_experiment_name: "Stale patients #{month} 2024",
+      start_time: "#{month} 2024".to_datetime.beginning_of_month,
+      end_time: "#{month} 2024".to_datetime.end_of_month
+    }
+  end
+  MAX_PATIENTS_PER_DAY = 5000
+  DISTRICTS = %w[Sylhet Moulvibazar Habiganj Sunamganj Barishal Jhalokathi Feni
+    Chattogram Bandarban Pabna Rajshahi Sirajganj Sherpur Jamalpur].freeze
+
+  INCLUDED_FACILITY_SLUG = Facility.where(facility_type: "UHC", district: DISTRICTS).pluck(:slug)
+
+  REGION_FILTERS = {
+    "facilities" => {"include" => INCLUDED_FACILITY_SLUG}
+  }.freeze
+
+  def up
+    return unless CountryConfig.current_country?("Bangladesh") && SimpleServer.env.production?
+
+    EXPERIMENTS_DATA.each do |experiment_data|
+      ActiveRecord::Base.transaction do
+        Experimentation::Experiment.current_patients.create!(
+          name: (experiment_data[:current_experiment_name]).to_s,
+          start_time: experiment_data[:start_time],
+          end_time: experiment_data[:end_time],
+          max_patients_per_day: MAX_PATIENTS_PER_DAY,
+          filters: REGION_FILTERS
+        ).tap do |experiment|
+          treatment_group = experiment.treatment_groups.create!(description: "cascade_free")
+          treatment_group.reminder_templates.create!(message: "notifications.set03.free", remind_on_in_days: 1)
+          treatment_group.reminder_templates.create!(message: "notifications.set03.free", remind_on_in_days: 3)
+        end
+      end
+
+      ActiveRecord::Base.transaction do
+        Experimentation::Experiment.stale_patients.create!(
+          name: (experiment_data[:stale_experiment_name]).to_s,
+          start_time: experiment_data[:start_time],
+          end_time: experiment_data[:end_time],
+          max_patients_per_day: MAX_PATIENTS_PER_DAY,
+          filters: REGION_FILTERS
+        ).tap do |experiment|
+          treatment_group = experiment.treatment_groups.create!(description: "cascade_free")
+          treatment_group.reminder_templates.create!(message: "notifications.set02.free", remind_on_in_days: 0)
+          treatment_group.reminder_templates.create!(message: "notifications.set03.free", remind_on_in_days: 3)
+        end
+      end
+    end
+  end
+
+  def down
+    return unless CountryConfig.current_country?("Bangladesh") && SimpleServer.env.production?
+
+    EXPERIMENTS_DATA.each do |experiment_data|
+      Experimentation::Experiment.current_patients.find_by_name(experiment_data[:current_experiment_name])&.cancel
+      Experimentation::Experiment.stale_patients.find_by_name(experiment_data[:stale_experiment_name])&.cancel
+    end
+  end
+end

db/data_schema.rb

@@ -1 +1 @@
-DataMigrate::Data.define(version: 20240401110047)
+DataMigrate::Data.define(version: 20240425072432)