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# redMine - project management software

# Copyright (C) 2006  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'

module RepositoriesHelper

  # truncate rev to 8 chars if it's quite long

  def truncate_long_revision_name(rev)

    rev.to_s.size <= 12 ? rev.to_s : rev.to_s[0, 8]

  end

  private :truncate_long_revision_name

  def format_revision(revision)

    if [:identifier, :revision, :scmid].all? { |e| revision.respond_to? e }

      if revision.scmid and revision.revision != revision.scmid and /[^\d]/ !~ revision.revision

        "#{revision.revision}:#{revision.scmid}"  # number:hashid

      else

        truncate_long_revision_name(revision.identifier)

      end

    else

      truncate_long_revision_name(revision)

    end

  end

  module_function :format_revision  # callable as RepositoriesHelper.format_revision

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

    @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

  end

  def repository_field_tags(form, repository)    

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

    send(method, form, repository) if repository.is_a?(Repository) && respond_to?(method) && method != 'repository_field_tags'

  end

  def scm_select_tag(repository)

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

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

      scm_options << ["Repository::#{scm}".constantize.scm_name, scm] if Setting.enabled_scm.include?(scm) || (repository && repository.class.name.demodulize == scm)

    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 => 'Root directory', :size => 60, :required => true, :disabled => (repository && !repository.new_record?)))

  end

  def mercurial_field_tags(form, repository)

      content_tag('p', form.text_field(:url, :label => 'Root directory', :size => 60, :required => true, :disabled => true))

# (repository && !repository.root_url.blank?)))

  end

  def git_field_tags(form, repository)

      content_tag('p', form.text_field(:url, :label => 'Path to .git directory', :size => 60, :required => true, :disabled => (repository && !repository.root_url.blank?)))

  end

  def cvs_field_tags(form, repository)

      content_tag('p', form.text_field(:root_url, :label => 'CVSROOT', :size => 60, :required => true, :disabled => !repository.new_record?)) +

      content_tag('p', form.text_field(:url, :label => 'Module', :size => 30, :required => true, :disabled => !repository.new_record?))

  end

  def bazaar_field_tags(form, repository)

      content_tag('p', form.text_field(:url, :label => 'Root directory', :size => 60, :required => true, :disabled => (repository && !repository.new_record?)))

  end

  def filesystem_field_tags(form, repository)

    content_tag('p', form.text_field(:url, :label => 'Root directory', :size => 60, :required => true, :disabled => (repository && !repository.root_url.blank?)))

  end

end