# nginx.ng.servers_config
#
# Manages the configuration of virtual host files.

{% from 'nginx/ng/map.jinja' import nginx, sls_block with context %}
{% set server_states = [] %}

# Simple path concatenation.
# Needs work to make this function on windows.
{% macro path_join(file, root) -%}
  {{ root ~ '/' ~ file }}
{%- endmacro %}

# Retrieves the disabled name of a particular server
{% macro disabled_name(server) -%}
  {%- if nginx.lookup.server_use_symlink -%}
    {{ nginx.servers.managed.get(server).get('disabled_name', server) }}
  {%- else -%}
    {{ nginx.servers.managed.get(server).get('disabled_name', server ~ nginx.servers.disabled_postfix) }}
  {%- endif -%}
{%- endmacro %}

# Gets the path of a particular server
{% macro server_path(server, state) -%}
  {%- if state == True -%}
    {{ path_join(server, nginx.servers.managed.get(server).get('enabled_dir', nginx.lookup.server_enabled)) }}
  {%- elif state == False -%}
    {{ path_join(disabled_name(server), nginx.servers.managed.get(server).get('available_dir', nginx.lookup.server_available)) }}
  {%- else -%}
    {{ path_join(server, nginx.servers.managed.get(server).get('available_dir', nginx.lookup.server_available)) }}
  {%- endif -%}
{%- endmacro %}

# Gets the current canonical name of a server
{% macro server_curpath(server) -%}
  {{ server_path(server, nginx.servers.managed.get(server).get('available')) }}
{%- endmacro %}

# Creates the sls block that manages symlinking / renaming servers
{% macro manage_status(server, state) -%}
  {%- set anti_state = {True:False, False:True}.get(state) -%}
  {% if state == True %}
    {%- if nginx.lookup.server_use_symlink %}
  file.symlink:
    {{ sls_block(nginx.servers.symlink_opts) }}
    - name: {{ server_path(server, state) }}
    - target: {{ server_path(server, anti_state) }}
    {%- else %}
  file.rename:
    {{ sls_block(nginx.servers.rename_opts) }}
    - name: {{ server_path(server, state) }}
    - source: {{ server_path(server, anti_state) }}
    {%- endif %}
  {%- elif state == False %}
    {%- if nginx.lookup.server_use_symlink %}
  file.absent:
    - name: {{ server_path(server, anti_state) }}
    {%- else %}
  file.rename:
    {{ sls_block(nginx.servers.rename_opts) }}
    - name: {{ server_path(server, state) }}
    - source: {{ server_path(server, anti_state) }}
    {%- endif -%}
  {%- endif -%}
{%- endmacro %}

# Makes sure the enabled directory exists
nginx_server_enabled_dir:
  file.directory:
    {{ sls_block(nginx.servers.dir_opts) }}
    - name: {{ nginx.lookup.server_enabled }}

# If enabled and available are not the same, create available
{% if nginx.lookup.server_enabled != nginx.lookup.server_available -%}
nginx_server_available_dir:
  file.directory:
    {{ sls_block(nginx.servers.dir_opts) }}
    - name: {{ nginx.lookup.server_available }}
{%- endif %}

# Manage the actual server files
{% for server, settings in nginx.servers.managed.items() %}
{% endfor %}

# Managed enabled/disabled state for servers
{% for server, settings in nginx.servers.managed.items() %}
{% if settings.config != None %}
{% set conf_state_id = 'server_conf_' ~ loop.index0 %}
{{ conf_state_id }}:
  file.managed:
    {{ sls_block(nginx.servers.managed_opts) }}
    - name: {{ server_curpath(server) }}
    - source: salt://nginx/ng/files/server.conf
    - template: jinja
    - context:
        config: {{ settings.config|json() }}
    {% if 'overwrite' in settings and settings.overwrite == False %}
    - unless:
      - test -e {{ server_curpath(server) }}
    {% endif %}
{% do server_states.append(conf_state_id) %}
{% endif %}

{% if settings.enabled != None %}
{% set status_state_id = 'server_state_' ~ loop.index0 %}
{{ status_state_id }}:
{{ manage_status(server, settings.enabled) }}
{% if settings.config != None %}
    - require:
      - file: {{ conf_state_id }}
{% endif %}

{% do server_states.append(status_state_id) %}
{% endif %}
{% endfor %}