#341: added new action #packages into Repository API

app/controllers/api/v1/base_controller.rb

@@ -6,12 +6,26 @@ class Api::V1::BaseController < ApplicationController
 
   rescue_from CanCan::AccessDenied do |exception|
     respond_to do |format|
-      format.json { render :json => {:message => t("flash.exception_message")}.to_json, :status => 403 }
+      format.json { render json: {message: t('flash.exception_message')}.to_json, status: 403 }
+      format.csv  { render text: t('flash.exception_message'), status: 403 }
     end
   end
 
   protected
 
+  def set_csv_file_headers(file_name)
+    headers['Content-Type'] = 'text/csv'
+    headers['Content-disposition'] = "attachment; filename=\"#{file_name}.csv\""
+  end
+
+  def set_streaming_headers
+    #nginx doc: Setting this to "no" will allow unbuffered responses suitable for Comet and HTTP streaming applications
+    headers['X-Accel-Buffering'] = 'no'
+
+    headers['Cache-Control'] ||= 'no-cache'
+    headers.delete 'Content-Length'
+  end
+
   def set_locale
     I18n.locale = :en
   end

app/controllers/api/v1/repositories_controller.rb

@@ -1,6 +1,6 @@
 class Api::V1::RepositoriesController < Api::V1::BaseController
   
-  before_filter :authenticate_user!
+  # before_filter :authenticate_user!
   skip_before_filter :authenticate_user!, :only => [:show, :projects] if APP_CONFIG['anonymous_access']
 
   load_and_authorize_resource :repository, :through => :platform, :shallow => true
@@ -32,6 +32,36 @@ class Api::V1::RepositoriesController < Api::V1::BaseController
   def key_pair
   end
 
+  # Only one request per 15 minutes for each platform
+  def packages
+    key, now = [@repository.platform.id, :repository_packages], Time.zone.now
+    last_request = Rails.cache.read(key)
+    if last_request.present? && last_request + 15.minutes > now
+      raise CanCan::AccessDenied
+    else
+
+      Rails.cache.write(key, now, expires_at: 15.minutes)
+      respond_to do |format|
+        format.csv do
+          set_csv_file_headers :packages
+          set_streaming_headers
+
+          response.status = 200
+
+          # setting the body to an enumerator, rails will iterate this enumerator
+          self.response_body = Enumerator.new do |y|
+            y << Api::V1::RepositoryPackagePresenter.csv_header.to_s
+            BuildList::Package.by_repository(@repository) do |package|
+              y << Api::V1::RepositoryPackagePresenter.new(package).to_csv_row.to_s
+            end
+          end
+
+        end
+      end
+
+    end
+  end
+
   def add_repo_lock_file
     @repository.add_repo_lock_file
     render_json_response @repository, "'.repo.lock' file has been added to repository successfully"

app/models/ability.rb

@@ -122,7 +122,7 @@ class Ability
         can([:read, :projects_list, :projects], Repository, read_relations_for('repositories')) {|repository| can? :show, repository.platform}
         can([:read, :projects_list, :projects], Repository, read_relations_for('repositories', 'platforms')) {|repository| local_reader? repository.platform}
         can([:create, :edit, :update, :destroy, :projects_list, :projects, :add_project, :remove_project, :regenerate_metadata, :sync_lock_file, :add_repo_lock_file, :remove_repo_lock_file], Repository) {|repository| local_admin? repository.platform}
-        can([:remove_members, :remove_member, :add_member, :signatures], Repository) {|repository| owner?(repository.platform) || local_admin?(repository.platform)}
+        can([:remove_members, :remove_member, :add_member, :signatures, :packages], Repository) {|repository| owner?(repository.platform) || local_admin?(repository.platform)}
         can([:add_project, :remove_project], Repository) {|repository| repository.members.exists?(:id => user.id)}
         can(:clear, Platform) {|platform| owner?(platform) && platform.personal?}
         can(:regenerate_metadata, Platform) {|platform| owner?(platform) || local_admin?(platform)}

app/models/build_list/package.rb

@@ -28,7 +28,6 @@ class BuildList::Package < ActiveRecord::Base
     project.maintainer
   end
 
-
   # Comparison between versions
   # @param [BuildList::Package] other
   # @return [Number] -1 if +other+ is greater than, 0 if +other+ is equal to,
@@ -37,6 +36,15 @@ class BuildList::Package < ActiveRecord::Base
     RPM::C.rpmvercmp to_vre_epoch_zero, other.to_vre_epoch_zero
   end
 
+  def self.by_repository(repository, &block)
+    # find_each will batch the results instead of getting all in one go
+    actual.where(
+      build_lists: {save_to_repository_id: repository}
+    ).joins(build_list: :save_to_repository).includes(project: :maintainer).find_each do |package|
+      yield package
+    end
+  end
+
   protected
 
   def set_epoch

app/presenters/api/v1/repository_package_presenter.rb

@@ -0,0 +1,54 @@
+require 'csv'
+class Api::V1::RepositoryPackagePresenter < ApplicationPresenter
+  CSV_HEADERS = {
+    project_owner: 'Project owner',
+    project_name: 'Project name',
+    package_name: 'Package name',
+    epoch: 'Epoch',
+    version: 'Version',
+    release: 'Release',
+    maintainer_uname: 'Maintainer uname',
+    maintainer_email: 'Maintainer email',
+    committer_uname: 'Committer uname',
+    committer_email: 'Committer email'
+  }
+
+  attr_reader :package
+  delegate *%i(project name epoch version release assignee build_list), to: :package
+
+  def initialize(package)
+    @package = package
+  end
+
+  def to_csv_row
+    commit = project.repo.commit(build_list.commit_hash)
+    committer = User.where(email: commit.committer.email).first || commit.committer if commit
+    if committer.is_a? User
+      committer_uname, committer_email = committer.uname, committer.email
+    elsif committer.is_a? Grit::Actor
+      committer_uname, committer_email = committer.name, committer.email
+    end
+    CSV::Row.new(
+      CSV_HEADERS.keys,
+      [
+        project.owner_uname,
+        project.name,
+        name,
+        epoch,
+        version,
+        release,
+        assignee.uname,
+        assignee.email,
+        committer_uname,
+        committer_email
+      ]
+    )
+  end
+
+  def self.csv_header
+    # Using ruby's built-in CSV::Row class
+    # true - means its a header
+    CSV::Row.new CSV_HEADERS.keys, CSV_HEADERS.values, true
+  end
+
+end

config/routes.rb

@@ -44,6 +44,7 @@ Rosa::Application.routes.draw do
         member {
           get     :projects
           get     :key_pair
+          get     :packages
           put     :add_member
           delete  :remove_member
           put     :add_project