Make cache key configurable

Some stores may want to more aggressively cache the responses,
preferring fewer requests to more accurate results.

3 files changed, 15 insertions, 7 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b704dee..edb0d68 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## master
+
+- Make response cache key configurable.
+
 ## v0.8.0
 
 - Increased response caching time to 3 hours.
diff --git a/lib/super_good/solidus_taxjar.rb b/lib/super_good/solidus_taxjar.rb
index 00c3ad5..7033501 100644
--- a/lib/super_good/solidus_taxjar.rb
+++ b/lib/super_good/solidus_taxjar.rb
@@ -11,6 +11,7 @@ require "super_good/solidus_taxjar/discount_calculator"
 module SuperGood
   module SolidusTaxJar
     class << self
+      attr_accessor :cache_key
       attr_accessor :discount_calculator
       attr_accessor :exception_handler
       attr_accessor :line_item_tax_label_maker
@@ -19,6 +20,15 @@ module SuperGood
       attr_accessor :test_mode
     end
 
+    self.cache_key = ->(order) {
+      APIParams.order_params(order).transform_values do |value|
+        case value
+        when Array, Hash then value.hash
+        else
+          value
+        end
+      end
+    }
     self.discount_calculator = ::SuperGood::SolidusTaxJar::DiscountCalculator
     self.exception_handler = ->(e) {
       Rails.logger.error "An error occurred while fetching TaxJar tax rates - #{e}: #{e.message}"
diff --git a/lib/super_good/solidus_taxjar/tax_calculator.rb b/lib/super_good/solidus_taxjar/tax_calculator.rb
index e8e12f4..e6ac0a2 100644
--- a/lib/super_good/solidus_taxjar/tax_calculator.rb
+++ b/lib/super_good/solidus_taxjar/tax_calculator.rb
@@ -123,13 +123,7 @@ module SuperGood
       end
 
       def cache_key
-        APIParams.order_params(order).transform_values do |value|
-          case value
-          when Array, Hash then value.hash
-          else
-            value
-          end
-        end
+        SuperGood::SolidusTaxJar.cache_key.(order)
       end
 
       def exception_handler