Switch to using FrozenRecord for loading communities

This allows us to query the records to get the local chapters, which
is more flexible and allows us to use other resources too.

Gemfile

@@ -46,6 +46,7 @@ gem "cancancan"
 gem "composite_primary_keys", "~> 13.0.0", "!= 13.0.1"
 gem "config"
 gem "delayed_job_active_record"
+gem "frozen_record"
 gem "http_accept_language", "~> 2.1.1"
 gem "i18n-js", ">= 3.0.0"
 gem "oauth-plugin", ">= 0.5.1"

Gemfile.lock

@@ -233,6 +233,8 @@ GEM
       rake
     ffi-libarchive (1.1.3)
       ffi (~> 1.0)
+    frozen_record (0.26.0)
+      activemodel
     fspath (3.1.2)
     gd2-ffij (0.4.0)
       ffi (>= 1.0.0)
@@ -530,6 +532,7 @@ DEPENDENCIES
   factory_bot_rails
   faraday
   ffi-libarchive
+  frozen_record
   gd2-ffij (>= 0.4.0)
   htmlentities
   http_accept_language (~> 2.1.1)
@@ -586,4 +589,4 @@ DEPENDENCIES
   webmock
 
 BUNDLED WITH
-   2.2.16
+   2.2.19

app/controllers/site_controller.rb

@@ -107,7 +107,7 @@ class SiteController < ApplicationController
   end
 
   def communities
-    @local_chapters = OsmCommunityIndex::LocalChapter.local_chapters
+    @local_chapters = Community.where(:type => "osm-lc").where.not(:id => "OSMF")
   end
 
   def export; end

app/models/community.rb

@@ -0,0 +1,8 @@
+class Community < FrozenRecord::Base
+  self.base_path = Rails.root.join("node_modules/osm-community-index/dist/")
+  self.backend = OsmCommunityIndex::ResourceBackend
+
+  def url
+    strings["url"]
+  end
+end

lib/osm_community_index.rb

@@ -1,12 +1,2 @@
 module OsmCommunityIndex
-  require "yaml"
-
-  def self.community_index
-    @community_index ||= community_index_from_json
-  end
-
-  def self.community_index_from_json
-    json_file = Rails.root.join("node_modules/osm-community-index/dist/resources.json")
-    JSON.parse(File.read(json_file))
-  end
 end

lib/osm_community_index/local_chapter.rb

@@ -1,40 +1,7 @@
 module OsmCommunityIndex
   class LocalChapter
-    attr_reader :id, :url
-
-    def initialize(id, url)
-      @id = id
-      @url = url
-    end
-
-    def self.local_chapters
-      @chapters = init_local_chapters
-    end
-
-    def self.init_local_chapters
-      raw_local_chapters = load_raw_local_chapters
-      raw_local_chapters.map do |chapter|
-        id = chapter[:id]
-        url = chapter[:resource]["strings"]["url"]
-        LocalChapter.new(id, url)
-      end
-    end
-
-    def self.load_raw_local_chapters
-      community_index = OsmCommunityIndex.community_index
-      raw_local_chapters = []
-      community_index["resources"].each do |id, resource|
-        resource.each do |key, value|
-          next unless key == "type" && value == "osm-lc" && id != "OSMF"
-
-          raw_local_chapters.push({ :id => id, :resource => resource })
-        end
-      end
-      raw_local_chapters
-    end
-
     def self.add_to_i18n
-      raw_local_chapters = load_raw_local_chapters
+      local_chapters = Community.where(:type => "osm-lc").where.not(:id => "OSMF")
       files = Dir.glob(Rails.root.join("node_modules/osm-community-index/i18n/*"))
       files.each do |file|
         locale = File.basename(file, ".yaml")
@@ -43,14 +10,13 @@ module OsmCommunityIndex
         locale_rails = locale.tr("_", "-")
         data = {}
 
-        raw_local_chapters.each do |chapter|
+        local_chapters.each do |chapter|
           id = chapter[:id]
-          resource = chapter[:resource]
 
           strings = community_index_yaml[id] || {}
           # if the name isn't defined then fall back on community,
           # as per discussion here: https://github.com/osmlab/osm-community-index/issues/483
-          strings["name"] = strings["name"] || resource["strings"]["name"] || resource["strings"]["community"]
+          strings["name"] = strings["name"] || chapter["strings"]["name"] || chapter["strings"]["community"]
 
           data.deep_merge!({ "osm_community_index" => { "local_chapter" => { id => strings } } })
         end

lib/osm_community_index/resource_backend.rb

@@ -0,0 +1,14 @@
+# A backend for FrozenRecord
+
+module OsmCommunityIndex
+  module ResourceBackend
+    def self.filename(_model)
+      "resources.json"
+    end
+
+    def self.load(file_path)
+      resources = JSON.parse(File.read(file_path))
+      resources["resources"].values
+    end
+  end
+end