#
# Puppet module for Apache
#
# This module is distributed under the GNU Affero General Public License:
# 
# Backup module for puppet
# Copyright (C) 2009 Sarava Group
# 
# 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 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/>.
#
# Using code from Debian Apache2 recipe:
#
#  http://reductivelabs.com/trac/puppet/wiki/Recipes/DebianApache2Recipe
#
# TODO: log level, log files, etc

$apache2_sites  = "/etc/apache2/sites"
$apache2_mods   = "/etc/apache2/mods"
$apache2_macros = "/etc/apache2/conf.d/macros"

class apache {

  package { "apache":
    name   => "apache2",
    ensure => installed,
  }

  package { "mod_macro":
    name   => "libapache2-mod-macro",
    ensure => installed,                                                                                                     
  }

  service { "apache":
    ensure     => running,
    require    => Package["apache"],
    hasstatus  => true,
    hasrestart => true,
  }

  module { "macro":
    ensure  => present,
    require => Package["mod_macro"],
  }

  # apache mod_macro configuration
  file { "${apache2_macros}":
    ensure  => present,
    content => template('apache/macros.erb'),
    owner   => root,
    group   => root,
    mode    => 0644,
    require => Module["macro"],
    notify  => Service["apache"],
  }

  # prepare variables to use in templates
  case $apache_sites_folder {
    '': { $apache_sites_folder = '/var/www/sites' }
  }

  case $apache_www_folder {
    '': { $apache_www_folder = '/var/www' }
  }

  # TODO: ensure folders exist with right modes and ownership
  define site($ensure = present, $docroot = false, $redirect = false,
                 $protocol = 'http', $server_alias = false, $use = false) {
    file { "${apache2_sites}-available/$title":
      ensure  => $ensure,
      content => template('apache/website.erb'),
      owner   => root,
      group   => root,
      mode    => 0644,
      require => File["${apache2_macros}"],
      notify  => Service["apache"],
    }

    $status = $ensure ? {
      'present' => "${apache2_sites}-available/$title",
      default   => 'absent',
    }

    # Enable the site without a2ensite
    #file { "/etc/apache2/sites-enabled/$title":
    #  ensure  => $status,
    #  owner   => root,
    #  group   => root,
    #  require => File["${apache2_sites}-available/$title"],
    #  notify  => Service["apache"],
    #}

    case $ensure {
      'present': {
        exec { "/usr/sbin/a2ensite $name":
          unless  => "/bin/sh -c '[ -L ${apache2_sites}-enabled/$name ] \
                  && [ ${apache2_sites}-enabled/$name -ef ${apache2_sites}-available/$name ]'",
          notify  => Exec["reload-apache2"],
          require => Package[$require],
        }
      }
      'absent': {
        exec { "/usr/sbin/a2dissite $name":
          onlyif  => "/bin/sh -c '[ -L ${apache2_sites}-enabled/$name ] \
                  && [ ${apache2_sites}-enabled/$name -ef ${apache2_sites}-available/$name ]'",
          notify  => Exec["reload-apache2"],
          require => Package["apache2"],
        }
      }
      default: { err ("Unknown ensure value: '$ensure'") }
    }
  }

  # Define an apache2 module. Debian packages place the module config
  # into /etc/apache2/mods-available.
  #
  # You can add a custom require (string) if the module depends on 
  # packages that aren't part of the default apache2 package. Because of 
  # the package dependencies, apache2 will automagically be included.
  define module($ensure = 'present') {
    case $ensure {
      'present': {
        exec { "/usr/sbin/a2enmod $name":
          unless  => "/bin/sh -c '[ -L ${apache2_mods}-enabled/${name}.load ] \
                  && [ ${apache2_mods}-enabled/${name}.load -ef ${apache2_mods}-available/${name}.load ]'",
          notify  => Exec["force-reload-apache2"],
        }
      }
      'absent': {
        exec { "/usr/sbin/a2dismod $name":
          onlyif  => "/bin/sh -c '[ -L ${apache2_mods}-enabled/${name}.load ] \
                  && [ ${apache2_mods}-enabled/${name}.load -ef ${apache2_mods}-available/${name}.load ]'",
          notify  => Exec["force-reload-apache2"],
        }
      }
      default: { err ("Unknown ensure value: '$ensure'") }
    }
  }

  # Notify this when apache needs a reload. This is only needed when
  # sites are added or removed, since a full restart then would be
  # a waste of time. When the module-config changes, a force-reload is
  # needed.
  exec { "reload-apache2":
     command     => "/etc/init.d/apache2 reload",
     refreshonly => true,
  }

  exec { "force-reload-apache2":
    command     => "/etc/init.d/apache2 force-reload",
    refreshonly => true,
  }
}