Fix date parsing with complex types

app/parsers/date_hash_parser.rb

@@ -20,12 +20,12 @@ class DateHashParser
   def initialize(date_hash)
     @date_hash = date_hash
       .slice(:day, :month, :year)
-      .compact_blank
-      .transform_values(&:to_i)
+      .transform_values { |value| Integer(value, exception: false) }
+      .select { |_, value| value&.positive? }
   end
 
   def parse
-    return if date_hash.empty? || any_non_positive_values? || day_without_month?
+    return if date_hash.empty? || day_without_month?
 
     Date.new(year, month, day)
   rescue Date::Error
@@ -40,12 +40,6 @@ def day_without_month?
     date_hash.key?(:day) && !date_hash.key?(:month)
   end
 
-  def any_non_positive_values?
-    # If the user enters a zero or negative value, or a string that `#to_i` converts to zero, we
-    # consider the whole date invalid
-    !date_hash.values.all?(&:positive?)
-  end
-
   def day
     date_hash.fetch(:day, 1)
   end

spec/parsers/date_hash_parser_spec.rb

@@ -60,6 +60,18 @@
 
         it { is_expected.to eq Date.new(2024, 12, 1) }
       end
+
+      context "with hash with a complex type value" do
+        let(:date_hash) { { day: [1], month: 12, year: 2024 } }
+
+        it { is_expected.to eq Date.new(2024, 12, 1) }
+      end
+
+      context "with hash with any non-numeric values" do
+        let(:date_hash) { { day: 13, month: 12, year: "baz" } }
+
+        it { is_expected.to eq Date.new(2024, 12, 13) }
+      end
     end
 
     describe "invalid input" do
@@ -99,12 +111,6 @@
         it { is_expected.to be_nil }
       end
 
-      context "with hash with any non-numeric values (even if others are good)" do
-        let(:date_hash) { { day: 13, month: 12, year: "baz" } }
-
-        it { is_expected.to be_nil }
-      end
-
       context "with hash with non-numeric year only" do
         let(:date_hash) { { year: "baz" } }