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# Redmine - project management software

# Copyright (C) 2006-2014  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# 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 General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

require 'SVG/Graph/Bar'

require 'SVG/Graph/BarHorizontal'

require 'digest/sha1'

require 'redmine/scm/adapters'

class ChangesetNotFound < Exception; end

class InvalidRevisionParam < Exception; end

class RepositoriesController < ApplicationController

  menu_item :repository

  menu_item :settings, :only => [:new, :create, :edit, :update, :destroy, :committers]

  default_search_scope :changesets

  before_filter :find_project_by_project_id, :only => [:new, :create]

  before_filter :find_repository, :only => [:edit, :update, :destroy, :committers]

  before_filter :find_project_repository, :except => [:new, :create, :edit, :update, :destroy, :committers]

  before_filter :find_changeset, :only => [:revision, :add_related_issue, :remove_related_issue]

  before_filter :authorize

  accept_rss_auth :revisions

  rescue_from Redmine::Scm::Adapters::CommandFailed, :with => :show_error_command_failed

  def new

    scm = params[:repository_scm] || (Redmine::Scm::Base.all & Setting.enabled_scm).first

    @repository = Repository.factory(scm)

    @repository.is_default = @project.repository.nil?

    @repository.project = @project

  end

  def create

    attrs = pickup_extra_info

    @repository = Repository.factory(params[:repository_scm])

    @repository.safe_attributes = params[:repository]

    if attrs[:attrs_extra].keys.any?

      @repository.merge_extra_info(attrs[:attrs_extra])

    end

    @repository.project = @project

    if request.post? && @repository.save

      redirect_to settings_project_path(@project, :tab => 'repositories')

    else

      render :action => 'new'

    end

  end

  def edit

  end

  def update

    params[:repository_scm]='Mercurial'

    attrs = pickup_extra_info

    @repository.safe_attributes = attrs[:attrs]

    if attrs[:attrs_extra].keys.any?

      @repository.merge_extra_info(attrs[:attrs_extra])

    end

    @repository.project = @project

    if request.put? && @repository.save

      redirect_to settings_project_path(@project, :tab => 'repositories')

    else

      render :action => 'edit'

    end

  end

  def pickup_extra_info

    p       = {}

    p_extra = {}

    params[:repository].each do |k, v|

      if k =~ /^extra_/

        p_extra[k] = v

      else

        p[k] = v

      end

    end

    {:attrs => p, :attrs_extra => p_extra}

  end

  private :pickup_extra_info

  def committers

    @committers = @repository.committers

    @users = @project.users

    additional_user_ids = @committers.collect(&:last).collect(&:to_i) - @users.collect(&:id)

    @users += User.where(:id => additional_user_ids).all unless additional_user_ids.empty?

    @users.compact!

    @users.sort!

    if request.post? && params[:committers].is_a?(Hash)

      # Build a hash with repository usernames as keys and corresponding user ids as values

      @repository.committer_ids = params[:committers].values.inject({}) {|h, c| h[c.first] = c.last; h}

      flash[:notice] = l(:notice_successful_update)

      redirect_to settings_project_path(@project, :tab => 'repositories')

    end

  end

  def destroy

    @repository.destroy if request.delete?

    redirect_to settings_project_path(@project, :tab => 'repositories')

  end

  def show

    @repository.fetch_changesets if @project.active? && Setting.autofetch_changesets? && @path.empty?

    @entries = @repository.entries(@path, @rev)

    @changeset = @repository.find_changeset_by_name(@rev)

    if request.xhr?

      @entries ? render(:partial => 'dir_list_content') : render(:nothing => true)

    else

      (show_error_not_found; return) unless @entries

      @changesets = @repository.latest_changesets(@path, @rev)

      @properties = @repository.properties(@path, @rev)

      @repositories = @project.repositories

      render :action => 'show'

    end

  end

  alias_method :browse, :show

  def changes

    @entry = @repository.entry(@path, @rev)

    (show_error_not_found; return) unless @entry

    @changesets = @repository.latest_changesets(@path, @rev, Setting.repository_log_display_limit.to_i)

    @properties = @repository.properties(@path, @rev)

    @changeset = @repository.find_changeset_by_name(@rev)

  end

  def revisions

    @changeset_count = @repository.changesets.count

    @changeset_pages = Paginator.new @changeset_count,

                                     per_page_option,

                                     params['page']

    @changesets = @repository.changesets.

      limit(@changeset_pages.per_page).

      offset(@changeset_pages.offset).

      includes(:user, :repository, :parents).

      all

    respond_to do |format|

      format.html { render :layout => false if request.xhr? }

      format.atom { render_feed(@changesets, :title => "#{@project.name}: #{l(:label_revision_plural)}") }

    end

  end

  def raw

    entry_and_raw(true)

  end

  def entry

    entry_and_raw(false)

  end

  def entry_and_raw(is_raw)

    @entry = @repository.entry(@path, @rev)

    (show_error_not_found; return) unless @entry

    # If the entry is a dir, show the browser

    (show; return) if @entry.is_dir?

    @content = @repository.cat(@path, @rev)

    (show_error_not_found; return) unless @content

    if is_raw

      # Force the download

      send_opt = { :filename => filename_for_content_disposition(@path.split('/').last) }

      send_type = Redmine::MimeType.of(@path)

      send_opt[:type] = send_type.to_s if send_type

      send_opt[:disposition] = (Redmine::MimeType.is_type?('image', @path) && !is_raw ? 'inline' : 'attachment')

      send_data @content, send_opt

    else

      @display_raw = ((@content.size && @content.size > Setting.file_max_size_displayed.to_i.kilobyte) || !is_entry_text_data?(@content, @path))

      # Prevent empty lines when displaying a file with Windows style eol

      # TODO: UTF-16

      # Is this needs? AttachmentsController reads file simply.

      @content.gsub!("\r\n", "\n")

      @changeset = @repository.find_changeset_by_name(@rev)

    end

  end

  private :entry_and_raw

  def is_entry_text_data?(ent, path)

    # UTF-16 contains "\x00".

    # It is very strict that file contains less than 30% of ascii symbols

    # in non Western Europe.

    return true if Redmine::MimeType.is_type?('text', path)

    # Ruby 1.8.6 has a bug of integer divisions.

    # http://apidock.com/ruby/v1_8_6_287/String/is_binary_data%3F

    return false if ent.is_binary_data?

    true

  end

  private :is_entry_text_data?

  def annotate

    @entry = @repository.entry(@path, @rev)

    (show_error_not_found; return) unless @entry

    @annotate = @repository.scm.annotate(@path, @rev)

    if @annotate.nil? || @annotate.empty?

      (render_error l(:error_scm_annotate); return)

    end

    ann_buf_size = 0

    @annotate.lines.each do |buf|

      ann_buf_size += buf.size

    end

    if ann_buf_size > Setting.file_max_size_displayed.to_i.kilobyte

      (render_error l(:error_scm_annotate_big_text_file); return)

    end

    @changeset = @repository.find_changeset_by_name(@rev)

  end

  def revision

    respond_to do |format|

      format.html

      format.js {render :layout => false}

    end

  end

  # Adds a related issue to a changeset

  # POST /projects/:project_id/repository/(:repository_id/)revisions/:rev/issues

  def add_related_issue

    issue_id = params[:issue_id].to_s.sub(/^#/,'')

    @issue = @changeset.find_referenced_issue_by_id(issue_id)

    if @issue && (!@issue.visible? || @changeset.issues.include?(@issue))

      @issue = nil

    end

    if @issue

      @changeset.issues << @issue

    end

  end

  # Removes a related issue from a changeset

  # DELETE /projects/:project_id/repository/(:repository_id/)revisions/:rev/issues/:issue_id

  def remove_related_issue

    @issue = Issue.visible.find_by_id(params[:issue_id])

    if @issue

      @changeset.issues.delete(@issue)

    end

  end

  def diff

    if params[:format] == 'diff'

      @diff = @repository.diff(@path, @rev, @rev_to)

      (show_error_not_found; return) unless @diff

      filename = "changeset_r#{@rev}"

      filename << "_r#{@rev_to}" if @rev_to

      send_data @diff.join, :filename => "#{filename}.diff",

                            :type => 'text/x-patch',

                            :disposition => 'attachment'

    else

      @diff_type = params[:type] || User.current.pref[:diff_type] || 'inline'

      @diff_type = 'inline' unless %w(inline sbs).include?(@diff_type)

      # Save diff type as user preference

      if User.current.logged? && @diff_type != User.current.pref[:diff_type]

        User.current.pref[:diff_type] = @diff_type

        User.current.preference.save

      end

      @cache_key = "repositories/diff/#{@repository.id}/" +

                      Digest::MD5.hexdigest("#{@path}-#{@rev}-#{@rev_to}-#{@diff_type}-#{current_language}")

      unless read_fragment(@cache_key)

        @diff = @repository.diff(@path, @rev, @rev_to)

        show_error_not_found unless @diff

      end

      @changeset = @repository.find_changeset_by_name(@rev)

      @changeset_to = @rev_to ? @repository.find_changeset_by_name(@rev_to) : nil

      @diff_format_revisions = @repository.diff_format_revisions(@changeset, @changeset_to)

    end

  end

  def stats

  end

  def graph

    data = nil

    case params[:graph]

    when "commits_per_month"

      data = graph_commits_per_month(@repository)

    when "commits_per_author"

      data = graph_commits_per_author(@repository)

    end

    if data

      headers["Content-Type"] = "image/svg+xml"

      send_data(data, :type => "image/svg+xml", :disposition => "inline")

    else

      render_404

    end

  end

  private

  def find_repository

    @repository = Repository.find(params[:id])

    @project = @repository.project

  rescue ActiveRecord::RecordNotFound

    render_404

  end

  REV_PARAM_RE = %r{\A[a-f0-9]*\Z}i

  def find_project_repository

    @project = Project.find(params[:id])

    if params[:repository_id].present?

      @repository = @project.repositories.find_by_identifier_param(params[:repository_id])

    else

      @repository = @project.repository

    end

    (render_404; return false) unless @repository

    @path = params[:path].is_a?(Array) ? params[:path].join('/') : params[:path].to_s

    @rev = params[:rev].blank? ? @repository.default_branch : params[:rev].to_s.strip

    @rev_to = params[:rev_to]

    unless @rev.to_s.match(REV_PARAM_RE) && @rev_to.to_s.match(REV_PARAM_RE)

      if @repository.branches.blank?

        raise InvalidRevisionParam

      end

    end

  rescue ActiveRecord::RecordNotFound

    render_404

  rescue InvalidRevisionParam

    show_error_not_found

  end

  def find_changeset

    if @rev.present?

      @changeset = @repository.find_changeset_by_name(@rev)

    end

    show_error_not_found unless @changeset

  end

  def show_error_not_found

    render_error :message => l(:error_scm_not_found), :status => 404

  end

  # Handler for Redmine::Scm::Adapters::CommandFailed exception

  def show_error_command_failed(exception)

    render_error l(:error_scm_command_failed, exception.message)

  end

  def graph_commits_per_month(repository)

    @date_to = Date.today

    @date_from = @date_to << 11

    @date_from = Date.civil(@date_from.year, @date_from.month, 1)

    commits_by_day = Changeset.

      where("repository_id = ? AND commit_date BETWEEN ? AND ?", repository.id, @date_from, @date_to).

      group(:commit_date).

      count

    commits_by_month = [0] * 12

    commits_by_day.each {|c| commits_by_month[(@date_to.month - c.first.to_date.month) % 12] += c.last }

    changes_by_day = Change.

      joins(:changeset).

      where("#{Changeset.table_name}.repository_id = ? AND #{Changeset.table_name}.commit_date BETWEEN ? AND ?", repository.id, @date_from, @date_to).

      group(:commit_date).

      count

    changes_by_month = [0] * 12

    changes_by_day.each {|c| changes_by_month[(@date_to.month - c.first.to_date.month) % 12] += c.last }

    fields = []

    12.times {|m| fields << month_name(((Date.today.month - 1 - m) % 12) + 1)}

    graph = SVG::Graph::Bar.new(

      :height => 300,

      :width => 800,

      :fields => fields.reverse,

      :stack => :side,

      :scale_integers => true,

      :step_x_labels => 2,

      :show_data_values => false,

      :graph_title => l(:label_commits_per_month),

      :show_graph_title => true

    )

    graph.add_data(

      :data => commits_by_month[0..11].reverse,

      :title => l(:label_revision_plural)

    )

    graph.add_data(

      :data => changes_by_month[0..11].reverse,

      :title => l(:label_change_plural)

    )

    graph.burn

  end

  def graph_commits_per_author(repository)

    commits_by_author = Changeset.where("repository_id = ?", repository.id).group(:committer).count

    commits_by_author.to_a.sort! {|x, y| x.last <=> y.last}

    changes_by_author = Change.joins(:changeset).where("#{Changeset.table_name}.repository_id = ?", repository.id).group(:committer).count

    h = changes_by_author.inject({}) {|o, i| o[i.first] = i.last; o}

    fields = commits_by_author.collect {|r| r.first}

    commits_data = commits_by_author.collect {|r| r.last}

    changes_data = commits_by_author.collect {|r| h[r.first] || 0}

    fields = fields + [""]*(10 - fields.length) if fields.length<10

    commits_data = commits_data + [0]*(10 - commits_data.length) if commits_data.length<10

    changes_data = changes_data + [0]*(10 - changes_data.length) if changes_data.length<10

    # Remove email adress in usernames

    fields = fields.collect {|c| c.gsub(%r{<.+@.+>}, '') }

    graph = SVG::Graph::BarHorizontal.new(

      :height => 30 * commits_data.length,

      :width => 800,

      :fields => fields,

      :stack => :side,

      :scale_integers => true,

      :show_data_values => false,

      :rotate_y_labels => false,

      :graph_title => l(:label_commits_per_author),

      :show_graph_title => true

    )

    graph.add_data(

      :data => commits_data,

      :title => l(:label_revision_plural)

    )

    graph.add_data(

      :data => changes_data,

      :title => l(:label_change_plural)

    )

    graph.burn

  end

end