Add Mastodon API service class, auth token config

Add a new REST API service class to keep things DRY

app/models/concerns/settings/mastodon_settings.rb

@@ -11,6 +11,9 @@ module Settings
 
       field :mastodon_address_domain, type: :string,
         default: ENV["MASTODON_ADDRESS_DOMAIN"].presence || self.primary_domain
+
+      field :mastodon_auth_token, type: :string,
+        default: ENV["MASTODON_AUTH_TOKEN"].presence
     end
   end
 end

app/services/btcpay_manager_service.rb

@@ -1,7 +1,7 @@
 #
 # API Docs: https://docs.btcpayserver.org/API/Greenfield/v1/
 #
-class BtcpayManagerService < ApplicationService
+class BtcpayManagerService < RestApiService
   private
 
     def base_url
@@ -19,18 +19,4 @@ class BtcpayManagerService < ApplicationService
         "Authorization" => "token #{auth_token}"
       }
     end
-
-    def endpoint_url(path)
-      "#{base_url}/#{path.gsub(/^\//, '')}"
-    end
-
-    def get(path, params = {})
-      res = Faraday.get endpoint_url(path), params, headers
-      JSON.parse(res.body)
-    end
-
-    def post(path, payload)
-      res = Faraday.post endpoint_url(path), payload.to_json, headers
-      JSON.parse(res.body)
-    end
 end

app/services/mastodon_manager_service.rb

@@ -0,0 +1,22 @@
+#
+# API Docs: https://docs.joinmastodon.org/methods/
+#
+class MastodonManagerService < RestApiService
+  private
+
+    def base_url
+      @base_url ||= "#{Setting.mastodon_public_url}/api"
+    end
+
+    def auth_token
+      @auth_token ||= Setting.mastodon_auth_token
+    end
+
+    def headers
+      {
+        "Content-Type" => "application/json",
+        "Accept" => "application/json",
+        "Authorization" => "Bearer #{auth_token}"
+      }
+    end
+end

app/services/rest_api_service.rb

@@ -0,0 +1,27 @@
+class RestApiService < ApplicationService
+  private
+
+    def base_url
+      raise NotImplementedError
+    end
+
+    def headers
+      raise NotImplementedError
+    end
+
+    def endpoint_url(path)
+      "#{base_url}/#{path.gsub(/^\//, '')}"
+    end
+
+    def get(path, params = {})
+      res = Faraday.get endpoint_url(path), params, headers
+      # TODO handle unsuccessful responses with no valid JSON body
+      JSON.parse(res.body)
+    end
+
+    def post(path, payload)
+      res = Faraday.post endpoint_url(path), payload.to_json, headers
+      # TODO handle unsuccessful responses with no valid JSON body
+      JSON.parse(res.body)
+    end
+end

app/views/admin/settings/services/_mastodon.html.erb

@@ -16,5 +16,10 @@
           key: :mastodon_address_domain,
           title: "User address domain"
         ) %>
+    <%= render FormElements::FieldsetResettableSettingComponent.new(
+          key: :mastodon_auth_token,
+          type: :password,
+          title: "API auth token"
+        ) %>
   <% end %>
 </ul>

docs/dev/mastodon.md

@@ -0,0 +1,10 @@
+# Mastodon
+
+## API access
+
+(Optional)
+
+Log in to your Mastodon instance with an admin account and create a new
+OAuth application:
+
+https://kosmos.social/settings/applications/new