Move status into the settings object

Only the very early boot code needs to look at the value
from the environment directly.

app/assets/javascripts/osm.js.erb

@@ -10,7 +10,7 @@ OSM = {
   SERVER_PROTOCOL:         <%= Settings.server_protocol.to_json %>,
   SERVER_URL:              <%= Settings.server_url.to_json %>,
   API_VERSION:             <%= Settings.api_version.to_json %>,
-  STATUS:                  <%= STATUS.to_json %>,
+  STATUS:                  <%= Settings.status.to_json %>,
   MAX_NOTE_REQUEST_AREA:   <%= Settings.max_note_request_area.to_json %>,
   OVERPASS_URL:            <%= Settings.overpass_url.to_json %>,
   NOMINATIM_URL:           <%= Settings.nominatim_url.to_json %>,

app/controllers/api/traces_controller.rb

@@ -163,7 +163,7 @@ module Api
     end
 
     def offline_redirect
-      redirect_to :action => :offline if STATUS == :gpx_offline
+      redirect_to :action => :offline if Settings.status == "gpx_offline"
     end
   end
 end

app/controllers/application_controller.rb

@@ -126,7 +126,7 @@ class ApplicationController < ActionController::Base
   end
 
   def check_database_readable(need_api = false)
-    if STATUS == :database_offline || (need_api && STATUS == :api_offline)
+    if Settings.status == "database_offline" || (need_api && Settings.status == "api_offline")
       if request.xhr?
         report_error "Database offline for maintenance", :service_unavailable
       else
@@ -136,8 +136,8 @@ class ApplicationController < ActionController::Base
   end
 
   def check_database_writable(need_api = false)
-    if STATUS == :database_offline || STATUS == :database_readonly ||
-       (need_api && (STATUS == :api_offline || STATUS == :api_readonly))
+    if Settings.status == "database_offline" || Settings.status == "database_readonly" ||
+       (need_api && (Settings.status == "api_offline" || Settings.status == "api_readonly"))
       if request.xhr?
         report_error "Database offline for maintenance", :service_unavailable
       else
@@ -161,9 +161,9 @@ class ApplicationController < ActionController::Base
   end
 
   def database_status
-    if STATUS == :database_offline
+    if Settings.status == "database_offline"
       :offline
-    elsif STATUS == :database_readonly
+    elsif Settings.status == "database_readonly"
       :readonly
     else
       :online
@@ -173,9 +173,9 @@ class ApplicationController < ActionController::Base
   def api_status
     status = database_status
     if status == :online
-      if STATUS == :api_offline
+      if Settings.status == "api_offline"
         status = :offline
-      elsif STATUS == :api_readonly
+      elsif Settings.status == "api_readonly"
         status = :readonly
       end
     end
@@ -184,7 +184,7 @@ class ApplicationController < ActionController::Base
 
   def gpx_status
     status = database_status
-    status = :offline if status == :online && STATUS == :gpx_offline
+    status = :offline if status == :online && Settings.status == "gpx_offline"
     status
   end
 
@@ -338,9 +338,9 @@ class ApplicationController < ActionController::Base
       :style_src => %w['unsafe-inline']
     )
 
-    if STATUS == :database_offline || STATUS == :api_offline
+    if Settings.status == "database_offline" || Settings.status == "api_offline"
       flash.now[:warning] = t("layouts.osm_offline")
-    elsif STATUS == :database_readonly || STATUS == :api_readonly
+    elsif Settings.status == "database_readonly" || Settings.status == "api_readonly"
       flash.now[:warning] = t("layouts.osm_read_only")
     end
 

app/controllers/site_controller.rb

@@ -12,7 +12,7 @@ class SiteController < ApplicationController
   authorize_resource :class => false
 
   def index
-    session[:location] ||= OSM.ip_location(request.env["REMOTE_ADDR"]) unless STATUS == :database_readonly || STATUS == :database_offline
+    session[:location] ||= OSM.ip_location(request.env["REMOTE_ADDR"]) unless Settings.status == "database_readonly" || Settings.status == "database_offline"
   end
 
   def permalink

app/controllers/traces_controller.rb

@@ -323,11 +323,11 @@ class TracesController < ApplicationController
   end
 
   def offline_warning
-    flash.now[:warning] = t "traces.offline_warning.message" if STATUS == :gpx_offline
+    flash.now[:warning] = t "traces.offline_warning.message" if Settings.status == "gpx_offline"
   end
 
   def offline_redirect
-    redirect_to :action => :offline if STATUS == :gpx_offline
+    redirect_to :action => :offline if Settings.status == "gpx_offline"
   end
 
   def default_visibility

app/views/site/edit.html.erb

@@ -1,7 +1,7 @@
 <% content_for :content do %>
-  <% if STATUS == :database_offline or STATUS == :api_offline %>
+  <% if Settings.status == "database_offline" or Settings.status == "api_offline" %>
     <p><%= t 'layouts.osm_offline' %></p>
-  <% elsif STATUS == :database_readonly or STATUS == :api_readonly %>
+  <% elsif Settings.status == "database_readonly" or Settings.status == "api_readonly" %>
     <p><%= t 'layouts.osm_read_only' %></p>
   <% elsif !current_user.data_public? %>
     <p><%= t '.not_public' %></p>

app/views/site/offline.html.erb

@@ -1,4 +1,4 @@
-<% if STATUS == :database_offline %>
+<% if Settings.status == "database_offline" %>
 <p><%= t 'layouts.osm_offline' %>
 </p>
 <% else %>

app/views/traces/_trace.html.erb

@@ -1,7 +1,7 @@
 <tr>
   <% cl = cycle('table0', 'table1') %>
   <td class="<%= cl %>">
-    <% if STATUS != :gpx_offline %>
+    <% if Settings.status != "gpx_offline" %>
       <% if trace.inserted %>
         <a href="<%= url_for :controller => 'traces', :action => 'show', :id => trace.id, :display_name => trace.user.display_name %>"><img src="<%= url_for :controller => 'traces', :action => 'icon', :id => trace.id, :display_name => trace.user.display_name %>" border="0" alt="" /></a>
       <% else %>

app/views/traces/show.html.erb

@@ -2,7 +2,7 @@
   <h2><%= t '.heading', :name => h(@trace.name) %></h2>
 <% end %>
 
-<% if STATUS != :gpx_offline %>
+<% if Settings.status != "gpx_offline" %>
   <% if @trace.inserted %>
     <img src="<%= url_for :controller => 'traces', :action => 'picture', :id => @trace.id, :display_name => @trace.user.display_name %>">
   <% else %>

config/application.rb

@@ -13,24 +13,7 @@ if File.exist?(File.expand_path("application.yml", __dir__))
 end
 # rubocop:enable Rails/Output, Rails/Exit
 
-# Set the STATUS constant from the environment, if it matches a recognized value
-ALLOWED_STATUS = [
-  :online,            # online and operating normally
-  :api_readonly,      # site online but API in read-only mode
-  :api_offline,       # site online but API offline
-  :database_readonly, # database and site in read-only mode
-  :database_offline,  # database offline with site in emergency mode
-  :gpx_offline        # gpx storage offline
-].freeze
-
-status = if ENV["STATUS"] && ALLOWED_STATUS.include?(ENV["STATUS"].to_sym)
-           ENV["STATUS"].to_sym
-         else
-           :online
-         end
-Object.const_set("STATUS", status)
-
-if STATUS == :database_offline
+if ENV["OPENSTREETMAP_STATUS"] == "database_offline"
   require "active_model/railtie"
   require "active_job/railtie"
   require "active_storage/engine"
@@ -63,15 +46,15 @@ module OpenStreetMap
 
     # This defaults to true from rails 5.0 but our code doesn't comply
     # with it at all so we turn it off
-    config.active_record.belongs_to_required_by_default = false unless STATUS == :database_offline
+    config.active_record.belongs_to_required_by_default = false unless Settings.status == "database_offline"
 
     # Use SQL instead of Active Record's schema dumper when creating the database.
     # This is necessary if your schema can't be completely dumped by the schema dumper,
     # like if you have constraints or database-specific column types
-    config.active_record.schema_format = :sql unless STATUS == :database_offline
+    config.active_record.schema_format = :sql unless Settings.status == "database_offline"
 
     # Don't eager load models when the database is offline
-    config.paths["app/models"].skip_eager_load! if STATUS == :database_offline
+    config.paths["app/models"].skip_eager_load! if Settings.status == "database_offline"
 
     # Use memcached for caching if required
     config.cache_store = :mem_cache_store, Settings.memcache_servers, { :namespace => "rails:cache" } if Settings.key?(:memcache_servers)

config/environments/development.rb

@@ -39,10 +39,10 @@ Rails.application.configure do
   config.active_support.deprecation = :log
 
   # Raise an error on page load if there are pending migrations.
-  config.active_record.migration_error = :page_load unless STATUS == :database_offline
+  config.active_record.migration_error = :page_load unless Settings.status == "database_offline"
 
   # Highlight code that triggered database queries in logs.
-  config.active_record.verbose_query_logs = true unless STATUS == :database_offline
+  config.active_record.verbose_query_logs = true unless Settings.status == "database_offline"
 
   # Debug mode disables concatenation and preprocessing of assets.
   # This option may cause significant delays in view rendering with a large

config/environments/production.rb

@@ -95,7 +95,7 @@ Rails.application.configure do
   end
 
   # Do not dump schema after migrations.
-  config.active_record.dump_schema_after_migration = false unless STATUS == :database_offline
+  config.active_record.dump_schema_after_migration = false unless Settings.status == "database_offline"
 
   # Enable autoloading of dependencies.
   config.enable_dependency_loading = true

config/initializers/config.rb

@@ -1,3 +1,13 @@
+# Allowed status values
+ALLOWED_STATUS ||= [
+  "online",            # online and operating normally
+  "api_readonly",      # site online but API in read-only mode
+  "api_offline",       # site online but API offline
+  "database_readonly", # database and site in read-only mode
+  "database_offline",  # database offline with site in emergency mode
+  "gpx_offline"        # gpx storage offline
+].freeze
+
 Config.setup do |config|
   # Name of the constant exposing loaded settings
   config.const_name = "Settings"
@@ -17,23 +27,23 @@ Config.setup do |config|
 
   # Load environment variables from the `ENV` object and override any settings defined in files.
   #
-  # config.use_env = false
+  config.use_env = true
 
   # Define ENV variable prefix deciding which variables to load into config.
   #
-  # config.env_prefix = 'Settings'
+  config.env_prefix = "OPENSTREETMAP"
 
   # What string to use as level separator for settings loaded from ENV variables. Default value of '.' works well
   # with Heroku, but you might want to change it for example for '__' to easy override settings from command line, where
   # using dots in variable names might not be allowed (eg. Bash).
   #
-  # config.env_separator = '.'
+  config.env_separator = "_"
 
   # Ability to process variables names:
   #   * nil  - no change
   #   * :downcase - convert to lower case
   #
-  # config.env_converter = :downcase
+  config.env_converter = :downcase
 
   # Parse numeric values as integers instead of strings.
   #
@@ -49,5 +59,6 @@ Config.setup do |config|
     required(:max_number_of_way_nodes).filled(:int?)
     required(:api_timeout).filled(:int?)
     required(:imagery_blacklist).maybe(:array?)
+    required(:status).filled(:str?, :included_in? => ALLOWED_STATUS)
   end
 end

config/settings.yml

@@ -16,13 +16,13 @@ email_return_path: "openstreetmap@example.com"
 # API version
 api_version: "0.6"
 # Application status - possible values are:
-#   :online - online and operating normally
-#   :api_readonly - site online but API in read-only mode
-#   :api_offline - site online but API offline
-#   :database_readonly - database and site in read-only mode
-#   :database_offline - database offline with site in emergency mode
-#   :gpx_offline - gpx storage offline
-status: :online
+#   online - online and operating normally
+#   api_readonly - site online but API in read-only mode
+#   api_offline - site online but API offline
+#   database_readonly - database and site in read-only mode
+#   database_offline - database offline with site in emergency mode
+#   gpx_offline - gpx storage offline
+status: "online"
 # The maximum area you're allowed to request, in square degrees
 max_request_area: 0.25
 # Number of GPS trace/trackpoints returned per-page