class Github::Repos::Collaborators

def add(user_name, repo_name, collaborator, params={})
  set :user => user_name, :repo => repo_name
  assert_presence_of user, repo, collaborator
  normalize! params
  put_request("/repos/#{user}/#{repo}/collaborators/#{collaborator}", params)
end

def collaborator?(user_name, repo_name, collaborator, params={})
  set :user => user_name, :repo => repo_name
  assert_presence_of user, repo, collaborator
  normalize! params
  get_request("/repos/#{user}/#{repo}/collaborators/#{collaborator}", params)
  true
rescue Github::Error::NotFound
  false
end

def list(user_name, repo_name, params={})
  set :user => user_name, :repo => repo_name
  assert_presence_of user, repo
  normalize! params
  response = get_request("/repos/#{user}/#{repo}/collaborators", params)
  return response unless block_given?
  response.each { |el| yield el }
end

def remove(user_name, repo_name, collaborator, params={})
  set :user => user_name, :repo => repo_name
  assert_presence_of collaborator
  normalize! params
  delete_request("/repos/#{user}/#{repo}/collaborators/#{collaborator}", params)
end