client.rb 2.01 KB
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module Gitlab
  module GitlabImport
    class Client
      attr_reader :client, :api

      PER_PAGE = 100

      def initialize(access_token)
        @client = ::OAuth2::Client.new(
          config.app_id,
          config.app_secret,
          github_options
        )

        if access_token
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          @api = OAuth2::AccessToken.from_hash(@client, access_token: access_token)
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        end
      end

      def authorize_url(redirect_uri)
        client.auth_code.authorize_url({
          redirect_uri: redirect_uri,
          scope: "api"
        })
      end

      def get_token(code, redirect_uri)
        client.auth_code.get_token(code, redirect_uri: redirect_uri).token
      end

      def issues(project_identifier)
        lazy_page_iterator(PER_PAGE) do |page|
          api.get("/api/v3/projects/#{project_identifier}/issues?per_page=#{PER_PAGE}&page=#{page}").parsed
        end
      end

      def issue_comments(project_identifier, issue_id)
        lazy_page_iterator(PER_PAGE) do |page|
          api.get("/api/v3/projects/#{project_identifier}/issues/#{issue_id}/notes?per_page=#{PER_PAGE}&page=#{page}").parsed
        end
      end

      def project(id)
        api.get("/api/v3/projects/#{id}").parsed
      end

      def projects
        lazy_page_iterator(PER_PAGE) do |page|
          api.get("/api/v3/projects?per_page=#{PER_PAGE}&page=#{page}").parsed
        end
      end

      private

      def lazy_page_iterator(per_page)
        Enumerator.new do |y|
          page = 1
          loop do
            items = yield(page)
            items.each do |item|
              y << item
            end
            break if items.empty? || items.size < per_page
            page += 1
          end
        end
      end

      def config
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        Gitlab.config.omniauth.providers.find{|provider| provider.name == "gitlab"}
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      end

      def github_options
        {
          site: 'https://gitlab.com/',
          authorize_url: 'oauth/authorize',
          token_url: 'oauth/token'
        }
      end
    end
  end
end