initial commit

.gitignore

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+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+
+# rspec failure tracking
+.rspec_status

.rspec

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+--format documentation
+--color
+--require spec_helper

.travis.yml

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+---
+sudo: false
+language: ruby
+cache: bundler
+rvm:
+  - 2.5.1
+before_install: gem install bundler -v 2.0.1

Gemfile

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+source "https://rubygems.org"
+
+# Specify your gem's dependencies in event_source.gemspec
+gemspec

Gemfile.lock

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+PATH
+  remote: .
+  specs:
+    event_source (0.1.0)
+      activesupport (>= 5.0)
+      dry-monads (~> 1.2)
+      globalid (~> 0.4)
+      mongoid (~> 7.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actionpack (5.2.3)
+      actionview (= 5.2.3)
+      activesupport (= 5.2.3)
+      rack (~> 2.0)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (5.2.3)
+      activesupport (= 5.2.3)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activemodel (5.2.3)
+      activesupport (= 5.2.3)
+    activesupport (5.2.3)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    bson (4.5.0)
+    builder (3.2.3)
+    byebug (11.0.1)
+    coderay (1.1.2)
+    concurrent-ruby (1.1.5)
+    crass (1.0.4)
+    diff-lcs (1.3)
+    dry-core (0.4.7)
+      concurrent-ruby (~> 1.0)
+    dry-equalizer (0.2.2)
+    dry-monads (1.2.0)
+      concurrent-ruby (~> 1.0)
+      dry-core (~> 0.4, >= 0.4.4)
+      dry-equalizer
+    erubi (1.8.0)
+    globalid (0.4.2)
+      activesupport (>= 4.2.0)
+    i18n (1.6.0)
+      concurrent-ruby (~> 1.0)
+    loofah (2.2.3)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.5.9)
+    method_source (0.9.2)
+    mini_portile2 (2.4.0)
+    minitest (5.11.3)
+    mongo (2.8.0)
+      bson (>= 4.4.2, < 5.0.0)
+    mongoid (7.0.3)
+      activemodel (>= 5.1, < 6.0.0)
+      mongo (>= 2.5.1, < 3.0.0)
+    nokogiri (1.10.3)
+      mini_portile2 (~> 2.4.0)
+    pry (0.12.2)
+      coderay (~> 1.1.0)
+      method_source (~> 0.9.0)
+    pry-byebug (3.7.0)
+      byebug (~> 11.0)
+      pry (~> 0.10)
+    rack (2.0.7)
+    rack-test (1.1.0)
+      rack (>= 1.0, < 3)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.0.4)
+      loofah (~> 2.2, >= 2.2.2)
+    railties (5.2.3)
+      actionpack (= 5.2.3)
+      activesupport (= 5.2.3)
+      method_source
+      rake (>= 0.8.7)
+      thor (>= 0.19.0, < 2.0)
+    rake (12.3.2)
+    rspec (3.8.0)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
+    rspec-core (3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-expectations (3.8.4)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.8.0)
+    rspec-mocks (3.8.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.8.0)
+    rspec-rails (3.8.2)
+      actionpack (>= 3.0)
+      activesupport (>= 3.0)
+      railties (>= 3.0)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-support (3.8.2)
+    thor (0.20.3)
+    thread_safe (0.3.6)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bundler (~> 2.0)
+  event_source!
+  mongoid (~> 7.0)
+  pry-byebug (~> 3.0)
+  rake (~> 12.0)
+  rspec (~> 3.0)
+  rspec-rails (~> 3.0)
+
+BUNDLED WITH
+   2.0.1

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2019 Dan Thomas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# EventSource
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/event_source`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'event_source'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install event_source
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/event_source.
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

Rakefile

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+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec

bin/console

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+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "event_source"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start(__FILE__)

bin/setup

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+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

event_source.gemspec

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+
+lib = File.expand_path("../lib", __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require "event_source/version"
+
+Gem::Specification.new do |spec|
+  spec.name          = "event_source"
+  spec.version       = EventSource::VERSION
+  spec.authors       = ["Dan Thomas"]
+  spec.email         = ["[email protected]"]
+
+  spec.summary       = %q{Record changes to application state by storing updates as a sequence of events}
+  spec.description   = %q{This service uses Mogoid/MongoDB to create an event object to record a state change and 
+                          then processes it to update values in the underlying model. It's an implementation of
+                          Martin Fowler's Event Sourcing design pattern and adapted from code developed by 
+                          Philippe Creux}
+  spec.homepage      = "https://github.com/ideacrew/event_source"
+  spec.license       = "MIT"
+
+  # Specify which files should be added to the gem when it is released.
+  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
+    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  end
+
+
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency 'activesupport',            '>= 5.0'
+  spec.add_dependency 'mongoid',                  '~> 7.0'
+  spec.add_dependency 'globalid',                 '~> 0.4'
+  spec.add_dependency 'dry-monads',               '~> 1.2'
+
+  spec.add_development_dependency 'bundler',      '~> 2.0'
+  spec.add_development_dependency 'rake',         '~> 12.0'
+  spec.add_development_dependency 'rspec',        '~> 3.0'
+  spec.add_development_dependency 'rspec-rails',  '~> 3.0'
+  spec.add_development_dependency 'pry-byebug',   '~> 3.0'
+  spec.add_development_dependency 'mongoid',      '~> 7.0'
+end

lib/event_source.rb

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+require 'dry/monads/result'
+
+require "active_support"
+require "active_support/core_ext/module/introspection"
+require "mongoid"
+require "event_source/version"
+require "event_source/command"
+require "event_source/dispatcher"
+require "event_source/event_stream"
+
+module EventSource
+  class Error < StandardError; end
+  # Your code goes here...
+end