1 files changed, 75 insertions, 0 deletions
diff --git a/lib/rspec_flaky/listener.rb b/lib/rspec_flaky/listener.rb
new file mode 100644
index 00000000000..ec2fbd9e36c
--- /dev/null
+++ b/lib/rspec_flaky/listener.rb
@@ -0,0 +1,75 @@
+require 'json'
+
+module RspecFlaky
+  class Listener
+    attr_reader :all_flaky_examples, :new_flaky_examples
+
+    def initialize
+      @new_flaky_examples = {}
+      @all_flaky_examples = init_all_flaky_examples
+    end
+
+    def example_passed(notification)
+      current_example = RspecFlaky::Example.new(notification.example)
+
+      return unless current_example.attempts > 1
+
+      flaky_example_hash = all_flaky_examples[current_example.uid]
+
+      all_flaky_examples[current_example.uid] =
+        if flaky_example_hash
+          FlakyExample.new(flaky_example_hash).tap do |ex|
+            ex.last_attempts_count = current_example.attempts
+            ex.flaky_reports += 1
+          end
+        else
+          FlakyExample.new(current_example).tap do |ex|
+            new_flaky_examples[current_example.uid] = ex
+          end
+        end
+    end
+
+    def dump_summary(_)
+      write_report_file(all_flaky_examples, all_flaky_examples_report_path)
+
+      if new_flaky_examples.any?
+        Rails.logger.warn "\nNew flaky examples detected:\n"
+        Rails.logger.warn JSON.pretty_generate(to_report(new_flaky_examples))
+
+        write_report_file(new_flaky_examples, new_flaky_examples_report_path)
+      end
+    end
+
+    def to_report(examples)
+      Hash[examples.map { |k, ex| [k, ex.to_h] }]
+    end
+
+    private
+
+    def init_all_flaky_examples
+      return {} unless File.exist?(all_flaky_examples_report_path)
+
+      all_flaky_examples = JSON.parse(File.read(all_flaky_examples_report_path))
+
+      Hash[(all_flaky_examples || {}).map { |k, ex| [k, FlakyExample.new(ex)] }]
+    end
+
+    def write_report_file(examples, file_path)
+      return unless ENV['FLAKY_RSPEC_GENERATE_REPORT'] == 'true'
+
+      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(to_report(examples)))
+    end
+
+    def all_flaky_examples_report_path
+      @all_flaky_examples_report_path ||= ENV['ALL_FLAKY_RSPEC_REPORT_PATH'] ||
+        Rails.root.join("rspec_flaky/all-report.json")
+    end
+
+    def new_flaky_examples_report_path
+      @new_flaky_examples_report_path ||= ENV['NEW_FLAKY_RSPEC_REPORT_PATH'] ||
+        Rails.root.join("rspec_flaky/new-report.json")
+    end
+  end
+end