Merge pull request joshsoftware#216 from prasadsurase/soft-delete-repos

Soft delete repositories.

Gemfile

@@ -35,6 +35,7 @@ gem 'whenever', :require => false
 gem 'mongoid-slug', '~> 5.2'
 gem 'redcarpet'
 gem 'rollbar'
+gem 'mongoid-paranoia'
 
 group :development, :test do
   gem 'byebug'

Gemfile.lock

@@ -202,6 +202,9 @@ GEM
     mongoid-compatibility (0.4.0)
       activesupport
       mongoid (>= 2.0)
+    mongoid-paranoia (2.0.0)
+      activesupport (~> 4.0)
+      mongoid (>= 4.0.0, <= 6.0.0)
     mongoid-slug (5.2.0)
       mongoid (>= 3.0)
       mongoid-compatibility
@@ -401,6 +404,7 @@ DEPENDENCIES
   minitest-rails-capybara
   mocha
   mongoid (~> 5.0)
+  mongoid-paranoia
   mongoid-slug (~> 5.2)
   omniauth-github (~> 1.1.2)
   poltergeist

app/jobs/user_repos_job.rb

@@ -20,9 +20,19 @@ def perform(user)
   end
 
   def add_repo(gh_repo)
-    repo = Repository.where(gh_id: gh_repo.id).first
+    #check if the repository is not soft deleted and
+    repo = Repository.unscoped.where(gh_id: gh_repo.id).first
 
     if repo
+      if repo.info.stargazers_count < REPOSITORY_CONFIG['popular']['stars']
+        # soft delete the repository if the star rating has declined.
+        repo.set(stars: gh_repo.stargazers_count)
+        repo.destroy
+      else
+        # restore the repo if the repository was already soft deleted and the current star count is greater then the threshold
+        repo.restore if repo.destroyed?
+        repo.set(stars: repo.info.stargazers_count)
+      end
       repo.users << user unless repo.users.include?(user)
       return
     end

app/models/repository.rb

@@ -3,6 +3,7 @@ class Repository
   include Mongoid::Timestamps
   include GlobalID::Identification
   include RepoLeaders
+  include Mongoid::Paranoia
 
   field :name,         type: String
   field :description,  type: String

test/jobs/user_repos_job_test.rb

@@ -112,4 +112,54 @@ def stub_get(path, endpoint = Github.endpoint.to_s)
     assert_nil parent_repo.source_gh_id
   end
 
+  test 'destroy the repository if it is already persisted if the rating has dropped' do
+    repo = create :repository, name: 'code-curiosity', ssh_url: '[email protected]:prasadsurase/code-curiosity.git',
+      owner: 'prasadsurase', stars: 26, gh_id: 67219068
+    @user.repositories << repo
+    @user.save
+    User.any_instance.stubs(:fetch_all_github_repos).returns(
+      JSON.parse(File.read('test/fixtures/repos.json')).collect{|i| Hashie::Mash.new(i)}
+    )
+    Repository.any_instance.stubs(:info).returns(
+      Hashie::Mash.new(JSON.parse(File.read('test/fixtures/user-fork-repo.json')))
+    )
+    assert_nil repo.deleted_at
+    assert_equal 1, Repository.count
+    assert_equal 26, repo.stars
+    UserReposJob.perform_now(@user)
+    repo.reload
+    refute_nil repo.deleted_at
+    assert repo.destroyed?
+    assert_equal 1, Repository.unscoped.count
+    assert_equal 0, Repository.count
+    assert_equal 24, repo.info.stargazers_count
+    assert_equal 24, repo.stars
+  end
+
+  test 'restore the repository if it is already persisted and destroyed if the rating has increased' do
+    repo = create :repository, name: 'code-curiosity', ssh_url: '[email protected]:prasadsurase/code-curiosity.git',
+      owner: 'prasadsurase', stars: 24, gh_id: 67219068, deleted_at: Time.now - 2.days
+    @user.repositories << repo
+    @user.save
+    User.any_instance.stubs(:fetch_all_github_repos).returns(
+      JSON.parse(File.read('test/fixtures/repos.json')).collect{|i| Hashie::Mash.new(i)}
+    )
+    Repository.any_instance.stubs(:info).returns(
+      Hashie::Mash.new(JSON.parse(File.read('test/fixtures/repo.json')))
+    )
+    refute_nil repo.deleted_at
+    assert repo.destroyed?
+    assert_equal 24, repo.stars
+    assert_equal 0, Repository.count
+    assert_equal 1, Repository.unscoped.count
+    UserReposJob.perform_now(@user)
+    repo.reload
+    refute repo.destroyed?
+    assert_nil repo.deleted_at
+    assert_equal 1, Repository.unscoped.count
+    assert_equal 1, Repository.count
+    assert_equal 25, repo.info.stargazers_count
+    assert_equal 25, repo.stars
+  end
+
 end