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# Redmine - project management software

# Copyright (C) 2006-2011  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 'iconv'

require 'redmine/codeset_util'

module RepositoriesHelper

  def format_revision(revision)

    if revision.respond_to? :format_identifier

      revision.format_identifier

    else

      revision.to_s

    end

  end

  def truncate_at_line_break(text, length = 255)

    if text

      text.gsub(%r{^(.{#{length}}[^\n]*)\n.+$}m, '\\1...')

    end

  end

  def render_properties(properties)

    unless properties.nil? || properties.empty?

      content = ''

      properties.keys.sort.each do |property|

        content << content_tag('li', "<b>#{h property}</b>: <span>#{h properties[property]}</span>")

      end

      content_tag('ul', content, :class => 'properties')

    end

  end

  def render_changeset_changes

    changes = @changeset.changes.find(:all, :limit => 1000, :order => 'path').collect do |change|

      case change.action

      when 'A'

        # Detects moved/copied files

        if !change.from_path.blank?

          change.action =

             @changeset.changes.detect {|c| c.action == 'D' && c.path == change.from_path} ? 'R' : 'C'

        end

        change

      when 'D'

        @changeset.changes.detect {|c| c.from_path == change.path} ? nil : change

      else

        change

      end

    end.compact

    tree = { }

    changes.each do |change|

      p = tree

      dirs = change.path.to_s.split('/').select {|d| !d.blank?}

      path = ''

      dirs.each do |dir|

        path += '/' + dir

        p[:s] ||= {}

        p = p[:s]

        p[path] ||= {}

        p = p[path]

      end

      p[:c] = change

    end

    render_changes_tree(tree[:s])

  end

  def render_changes_tree(tree)

    return '' if tree.nil?

    output = ''

    output << '<ul>'

    tree.keys.sort.each do |file|

      style = 'change'

      text = File.basename(h(file))

      if s = tree[file][:s]

        style << ' folder'

        path_param = to_path_param(@repository.relative_path(file))

        text = link_to(text, :controller => 'repositories',

                             :action => 'show',

                             :id => @project,

                             :path => path_param,

                             :rev => @changeset.identifier)

        output << "<li class='#{style}'>#{text}</li>"

        output << render_changes_tree(s)

      elsif c = tree[file][:c]

        style << " change-#{c.action}"

        path_param = to_path_param(@repository.relative_path(c.path))

        text = link_to(text, :controller => 'repositories',

                             :action => 'entry',

                             :id => @project,

                             :path => path_param,

                             :rev => @changeset.identifier) unless c.action == 'D'

        text << " - #{c.revision}" unless c.revision.blank?

        text << ' (' + link_to('diff', :controller => 'repositories',

                                       :action => 'diff',

                                       :id => @project,

                                       :path => path_param,

                                       :rev => @changeset.identifier) + ') ' if c.action == 'M'

        text << ' ' + content_tag('span', c.from_path, :class => 'copied-from') unless c.from_path.blank?

        output << "<li class='#{style}'>#{text}</li>"

      end

    end

    output << '</ul>'

    output

  end

  def to_utf8(str)

    return str if str.nil?

    str = to_utf8_internal(str)

    if str.respond_to?(:force_encoding)

      str.force_encoding('UTF-8')

    end

    str

  end

  def to_utf8_internal(str)

    return str if str.nil?

    if str.respond_to?(:force_encoding)

      str.force_encoding('ASCII-8BIT')

    end

    return str if str.empty?

    return str if /\A[\r\n\t\x20-\x7e]*\Z/n.match(str) # for us-ascii

    if str.respond_to?(:force_encoding)

      str.force_encoding('UTF-8')

    end

    @encodings ||= Setting.repositories_encodings.split(',').collect(&:strip)

    @encodings.each do |encoding|

      begin

        return Iconv.conv('UTF-8', encoding, str)

      rescue Iconv::Failure

        # do nothing here and try the next encoding

      end

    end

    str = Redmine::CodesetUtil.replace_invalid_utf8(str)

  end

  private :to_utf8_internal

  def repository_field_tags(form, repository)

    method = repository.class.name.demodulize.underscore + "_field_tags"

    if repository.is_a?(Repository) &&

        respond_to?(method) && method != 'repository_field_tags'

      send(method, form, repository)

    end

  end

  def scm_select_tag(repository)

    scm_options = [["--- #{l(:actionview_instancetag_blank_option)} ---", '']]

    Redmine::Scm::Base.all.each do |scm|

    if Setting.enabled_scm.include?(scm) ||

          (repository && repository.class.name.demodulize == scm)

        scm_options << ["Repository::#{scm}".constantize.scm_name, scm]

      end

    end

    select_tag('repository_scm',

               options_for_select(scm_options, repository.class.name.demodulize),

               :disabled => (repository && !repository.new_record?),

               :onchange => remote_function(

                  :url => {

                      :controller => 'repositories',

                      :action     => 'edit',

                      :id         => @project

                   },

               :method => :get,

               :with   => "Form.serialize(this.form)")

             )

  end

  def with_leading_slash(path)

    path.to_s.starts_with?('/') ? path : "/#{path}"

  end

  def without_leading_slash(path)

    path.gsub(%r{^/+}, '')

  end

  def subversion_field_tags(form, repository)

      content_tag('p', form.text_field(:url, :size => 60, :required => true,

                       :disabled => (repository && !repository.root_url.blank?)) +

                       '<br />(file:///, http://, https://, svn://, svn+[tunnelscheme]://)') +

      content_tag('p', form.text_field(:login, :size => 30)) +

      content_tag('p', form.password_field(

                            :password, :size => 30, :name => 'ignore',

                            :value => ((repository.new_record? || repository.password.blank?) ? '' : ('x'*15)),

                            :onfocus => "this.value=''; this.name='repository[password]';",

                            :onchange => "this.name='repository[password]';"))

  end

  def darcs_field_tags(form, repository)

    content_tag('p', form.text_field(

                     :url, :label => l(:field_path_to_repository),

                     :size => 60, :required => true,

                     :disabled => (repository && !repository.new_record?))) +

    content_tag('p', form.select(

                     :log_encoding, [nil] + Setting::ENCODINGS,

                     :label => l(:field_commit_logs_encoding), :required => true))

  end

  def mercurial_field_tags(form, repository)

    content_tag('p', form.text_field(

                       :url, :label => l(:field_path_to_repository),

                       :size => 60, :required => true,

                       :disabled => (repository && !repository.root_url.blank?)

                         ) +

                     '<br />' + l(:text_mercurial_repository_note)) +

    content_tag('p', form.select(

                        :path_encoding, [nil] + Setting::ENCODINGS,

                        :label => l(:field_scm_path_encoding)

                        ) +

                     '<br />' + l(:text_scm_path_encoding_note))

  end

  def git_field_tags(form, repository)

    content_tag('p', form.text_field(

                       :url, :label => l(:field_path_to_repository),

                       :size => 60, :required => true,

                       :disabled => (repository && !repository.root_url.blank?)

                         ) +

                      '<br />' + l(:text_git_repository_note)) +

    content_tag('p', form.select(

                        :path_encoding, [nil] + Setting::ENCODINGS,

                        :label => l(:field_scm_path_encoding)

                        ) +

                     '<br />' + l(:text_scm_path_encoding_note)) +

    content_tag('p', form.check_box(

                        :extra_report_last_commit,

                        :label => l(:label_git_report_last_commit)

                         ))

  end

  def cvs_field_tags(form, repository)

    content_tag('p', form.text_field(

                     :root_url,

                     :label => l(:field_cvsroot),

                     :size => 60, :required => true,

                     :disabled => !repository.new_record?)) +

    content_tag('p', form.text_field(

                     :url,

                     :label => l(:field_cvs_module),

                     :size => 30, :required => true,

                     :disabled => !repository.new_record?)) +

    content_tag('p', form.select(

                     :log_encoding, [nil] + Setting::ENCODINGS,

                     :label => l(:field_commit_logs_encoding), :required => true)) +

    content_tag('p', form.select(

                        :path_encoding, [nil] + Setting::ENCODINGS,

                        :label => l(:field_scm_path_encoding)

                        ) +

                     '<br />' + l(:text_scm_path_encoding_note))

  end

  def bazaar_field_tags(form, repository)

    content_tag('p', form.text_field(

                     :url, :label => l(:field_path_to_repository),

                     :size => 60, :required => true,

                     :disabled => (repository && !repository.new_record?))) +

    content_tag('p', form.select(

                     :log_encoding, [nil] + Setting::ENCODINGS,

                     :label => l(:field_commit_logs_encoding), :required => true))

  end

  def filesystem_field_tags(form, repository)

    content_tag('p', form.text_field(

                     :url, :label => l(:field_root_directory),

                     :size => 60, :required => true,

                     :disabled => (repository && !repository.root_url.blank?))) +

    content_tag('p', form.select(

                        :path_encoding, [nil] + Setting::ENCODINGS,

                        :label => l(:field_scm_path_encoding)

                        ) +

                     '<br />' + l(:text_scm_path_encoding_note))

  end

end