Resolves #4922

app/controllers/application_controller.rb

@@ -13,6 +13,7 @@ class ApplicationController < ActionController::Base
   helper_method :current_role
 
   rescue_from ActiveRecord::RecordNotFound, with: :not_found!
+  rescue_from Errors::InvalidDateRange, with: :invalid_date
 
   def current_organization
     return @current_organization if @current_organization
@@ -114,6 +115,11 @@ def swaddled
     response.headers["swaddled-by"] = "rubyforgood"
   end
 
+  def invalid_date(date_value)
+    flash[:error] = "Date range '#{date_value}' not properly formatted. Filters reset."
+    redirect_to controller: params["controller"], action: params["action"]
+  end
+
   protected
 
   def setup_date_range_picker

app/helpers/date_range_helper.rb

@@ -37,7 +37,7 @@ def selected_interval
     date_range_params.split(" - ").map do |d|
       Date.strptime(d, "%B %d, %Y")
     rescue
-      raise "Invalid date: #{d} in #{date_range_params}"
+      raise Errors::InvalidDateRange.new(date_range_params)
     end
   end
 

app/models/errors.rb

@@ -60,4 +60,13 @@ def message
       "Could not complete action: inventory already has items stored"
     end
   end
+
+  class InvalidDateRange < StandardError
+    attr_reader :invalid_date
+
+    def initialize(invalid_date)
+      super
+      @invalid_date = invalid_date
+    end
+  end
 end

spec/helpers/date_range_helper_spec.rb

@@ -0,0 +1,18 @@
+RSpec.describe DateRangeHelper, type: :helper do
+  context "when parsing date range params" do
+    it "should return the default date value" do
+      expect(date_range_params).to eq(default_date)
+    end
+  end
+
+  context "when creating a date interval using selected_interval" do
+    it "should return the correct date interval using the default date" do
+      expect(selected_interval).to eq([2.months.ago.to_date, 1.month.from_now.to_date])
+    end
+
+    it "should raise Errors:InvalidDateRange when input is invalid" do
+      allow_any_instance_of(DateRangeHelper).to receive(:default_date).and_return("nov 08 to feb 08")
+      expect { selected_interval }.to raise_error(Errors::InvalidDateRange, "nov 08 to feb 08")
+    end
+  end
+end