# encoding: utf-8
#--
#   Copyright (C) 2011-2012 Gitorious AS
#   Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
#   Copyright (C) 2008 Johan Sørensen <johan@johansorensen.com>
#   Copyright (C) 2008 David A. Cuadrado <krawek@gmail.com>
#   Copyright (C) 2008 Tor Arne Vestbø <tavestbo@trolltech.com>
#
#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU Affero General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU Affero General Public License for more details.
#
#   You should have received a copy of the GNU Affero General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#++

class CommitsController < ApplicationController
  REF_TYPE = :project_repository_commits_in_ref_path
  before_filter :find_project_and_repository
  before_filter :check_repository_for_commits
  skip_before_filter :public_and_logged_in, :only => [:diffs]
  skip_before_filter :require_current_eula, :only => [:diffs]
  skip_after_filter :mark_flash_status, :only => [:diffs]
  renders_in_site_specific_context

  def index
    if params[:branch].blank?
      redirect_to_ref(@repository.head_candidate.name, REF_TYPE) and return
    end

    @git = @repository.git
    @ref, @path = branch_and_path(params[:branch], @git)

    head = get_head(@ref)
    return handle_unknown_ref(@ref, @git, REF_TYPE) if head.nil?

    if stale_conditional?(head.commit.id, head.commit.committed_date.utc)
      @root = Breadcrumb::Branch.new(head, @repository)

      @commits = paginate(page_free_redirect_options) do
        @repository.cached_paginated_commits(@ref, params[:page])
      end

      return if @commits.count == 0 && params.key?(:page)

      @atom_auto_discovery_url = project_repository_formatted_commits_feed_path(@project, @repository, params[:branch], :atom)
      respond_to do |format|
        format.html
      end
    end
  end

  def show
    @diffs = []
    @diffmode = params[:diffmode] == "sidebyside" ? "sidebyside" : "inline"
    @git = @repository.git
    @diffs_url = project_repository_commit_diffs_url(:project_id => params[:project_id],
                                                     :repository_id => params[:repository_id],
                                                     :id => params[:id])
    @comments_url = project_repository_commit_comments_url(:project_id => params[:project_id],
                                                           :repository_id => params[:repository_id],
                                                           :id => params[:id])

    unless @commit = @git.commit(params[:id])
      handle_missing_sha and return
    end

    @root = Breadcrumb::Commit.new(:repository => @repository, :id => @commit.id_abbrev)

    respond_to do |format|
      format.html

      format.diff do
        render(:text => commit_diffs.map { |d| d.diff }.join("\n"),
               :content_type => "text/plain")
      end

      format.patch do
        render :text => @commit.to_patch, :content_type => "text/plain"
      end
    end
  end

  def feed
    expires_in(30.minutes, :public => true)
    @git = @repository.git
    @ref = desplat_path(params[:branch])
    @commits = @repository.git.commits(@ref, 1)
    return if @commits.empty?
    if stale?(:etag => @commits.first.id, :last_modified => @commits.first.committed_date.utc)
      @commits += @repository.git.commits(@ref, 49, 1)
      respond_to do |format|
        format.atom
      end
    end
  end

  protected
  def handle_missing_sha
    flash[:error] = "No such SHA1 was found"
    redirect_to(project_repository_commits_path(@project, @repository))
  end

  def commit_diffs
    @commit.parents.empty? ? [] : @commit.diffs
  end
end