# Directly copied from eycap-0.5.2 (thanks!)
#
# With these tasks you can:
#   - dump your production database and save it in current_path/db_backups
#   - dump your production into your local database (clone_to_local)
#
# Tested and fixed by fjguzman, prosenstein

namespace :db do
  task :backup_name, :roles => :db, :only => { :primary => true } do
    now = Time.now
    run "mkdir -p #{current_path}/db_backups"
    backup_time = [now.year,now.month,now.day,now.hour,now.min,now.sec].join('-')
    set :backup_file, "#{current_path}/db_backups/#{@environment_database}-snapshot-#{backup_time}.sql"
  end

  desc "Backup your MySQL or PostgreSQL database to current_path+/db_backups"
  task :dump, :roles => :db, :only => {:primary => true} do
    run("cat #{current_path}/config/database.yml") { |channel, stream, data| @environment_info = YAML.load(data)[rails_env] }
    dbuser = @environment_info['username']
    dbpass = @environment_info['password']
    @environment_database = @environment_info['database']
    dbhost = @environment_info['host']
    dbhost_switch = "-h #{dbhost}" if dbhost && !dbhost.blank?
    backup_name
    if @environment_info['adapter'] == 'mysql'
      #dbhost = environment_dbhost.sub('-master', '') + '-replica' if dbhost != 'localhost' # added for Solo offering, which uses localhost
      run "mysqldump --add-drop-table -u #{dbuser} #{dbhost_switch} -p #{@environment_database} | bzip2 -c > #{backup_file}.bz2" do |ch, stream, out |
        ch.send_data "#{dbpass}\n" if out=~ /^Enter password:/
      end
    else
      run "pg_dump -W -c -U #{dbuser} #{dbhost_switch} #{@environment_database} | bzip2 -c > #{backup_file}.bz2" do |ch, stream, out |
        ch.send_data "#{dbpass}\n" if out=~ /^Password:/
      end
    end
  end

  desc "Sync your production database to your local workstation"
  task :clone_to_local, :roles => :db, :only => {:primary => true} do
    dump
    get "#{backup_file}.bz2", "/tmp/#{application}.sql.bz2"
    development_info = YAML.load_file("config/database.yml")['development']
    dbhost = development_info['host']
    dbhost_switch = "-h #{dbhost}" if dbhost && !dbhost.blank?
    if development_info['adapter'] == 'mysql'
      run_str = "bzcat /tmp/#{application}.sql.bz2 | mysql -u #{development_info['username']} --password='#{development_info['password']}' #{dbhost_switch} #{development_info['database']}"
    else
      run_str = "PGPASSWORD=#{development_info['password']} bzcat /tmp/#{application}.sql.bz2 | psql -U #{development_info['username']} #{dbhost_switch} #{development_info['database']}"
    end
    %x!#{run_str}!
  end
end