#--
#   Git Repository Metafile Helper
#
#   Copyright (C) 2010 Tero Hanninen
#
#   This helper is used for updating repositories' metainformation:
#   adding/updating metafiles in repos and updating metainfo in the database.
#
#   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/>.
#++

module GrmfHelper

require "yaml"
require "fileutils"

  # Reads metainfo from repository and updates that info to database
  def update_metainfo_to_database(repo)
    path  = full_path(repo.hashed_path)
    rep   = Grit::Repo.new(path)
    blob  = rep.tree(meta_branch_name)/'repository.yml'
    obj   = YAML::load(blob.data)
    name  = obj["name"]
    merge_requests_enabled = obj["merge_request_enabled"]

    blob2            = rep.tree(meta_branch_name)/'description'
    repo.description = blob2.data
    repo.name        = name
    repo.merge_requests_enabled = merge_requests_enabled
    repo.save!
  end

  # Updates metafiles into repo from given repo object
  def update_metainfo_to_repository(repo_obj)
    path    = full_path(repo_obj.hashed_path)
    repo    = Grit::Repo.new(path)
    index   = repo.index

    #author  = repo_obj.owner.login
    #if repo_obj.owner.fullname != nil then author = repo_obj.owner.fullname end

    content = to_yaml_obj({ "name"                   => repo_obj.name, 
                            "merge_requests_enabled" => repo_obj.merge_requests_enabled })
    #                        "author"                 => author })

    index.add('repository.yml', content)
    index.add('description',    repo_obj.description)

    parents     = [repo.commits(meta_branch_name, 1, 0).first]
    actor       = Grit::Actor.new("yousource","nomail")
    last_tree   = nil #index.read_tree(repo.tree(meta_branch_name).id) 
    index.commit("Update metafiles.", parents, actor, last_tree, meta_branch_name)
  end

  def meta_branch_name
    GitoriousConfig['repo_meta_branch']
  end

  def full_path(repo_hashed_path)
    File.join(GitoriousConfig['repository_base_path'], "#{repo_hashed_path}.git")
  end

  # Returns any given ruby-object as a yaml-object which is a string.
  def to_yaml_obj(obj)
    YAML::dump(obj)
  end

end