1 files changed, 64 insertions, 0 deletions
diff --git a/lib/rspec_flaky/listener.rb b/lib/rspec_flaky/listener.rb
new file mode 100644
index 00000000000..4a5bfec9967
--- /dev/null
+++ b/lib/rspec_flaky/listener.rb
@@ -0,0 +1,64 @@
+require 'json'
+
+module RspecFlaky
+  class Listener
+    # - suite_flaky_examples: contains all the currently tracked flacky example
+    #   for the whole RSpec suite
+    # - flaky_examples: contains the examples detected as flaky during the
+    #   current RSpec run
+    attr_reader :suite_flaky_examples, :flaky_examples
+
+    def initialize(suite_flaky_examples_json = nil)
+      @flaky_examples = FlakyExamplesCollection.new
+      @suite_flaky_examples = init_suite_flaky_examples(suite_flaky_examples_json)
+    end
+
+    def example_passed(notification)
+      current_example = RspecFlaky::Example.new(notification.example)
+
+      return unless current_example.attempts > 1
+
+      flaky_example = suite_flaky_examples.fetch(current_example.uid) { FlakyExample.new(current_example) }
+      flaky_example.update_flakiness!(last_attempts_count: current_example.attempts)
+
+      flaky_examples[current_example.uid] = flaky_example
+    end
+
+    def dump_summary(_)
+      write_report_file(flaky_examples, RspecFlaky::Config.flaky_examples_report_path)
+
+      new_flaky_examples = flaky_examples - suite_flaky_examples
+      if new_flaky_examples.any?
+        Rails.logger.warn "\nNew flaky examples detected:\n"
+        Rails.logger.warn JSON.pretty_generate(new_flaky_examples.to_report)
+
+        write_report_file(new_flaky_examples, RspecFlaky::Config.new_flaky_examples_report_path)
+      end
+    end
+
+    def to_report(examples)
+      Hash[examples.map { |k, ex| [k, ex.to_h] }]
+    end
+
+    private
+
+    def init_suite_flaky_examples(suite_flaky_examples_json = nil)
+      unless suite_flaky_examples_json
+        return {} unless File.exist?(RspecFlaky::Config.suite_flaky_examples_report_path)
+
+        suite_flaky_examples_json = File.read(RspecFlaky::Config.suite_flaky_examples_report_path)
+      end
+
+      FlakyExamplesCollection.from_json(suite_flaky_examples_json)
+    end
+
+    def write_report_file(examples_collection, file_path)
+      return unless RspecFlaky::Config.generate_report?
+
+      report_path_dir = File.dirname(file_path)
+      FileUtils.mkdir_p(report_path_dir) unless Dir.exist?(report_path_dir)
+
+      File.write(file_path, JSON.pretty_generate(examples_collection.to_report))
+    end
+  end
+end