feat: added contactless emv support feature and updated features doc (#2119)

* added contactless emv support feature and updated features doc

Author: qcdyx

docs/FEATURES.md

@@ -26,6 +26,7 @@ The validator will produce the [list of features](https://gtfs.org/getting_start
 | Fares                    | Time-Based Fares          | One line of data in [timeframes.txt](https://gtfs.org/schedule/reference/#timeframestxt) AND one line of data in [fare_products.txt](https://gtfs.org/schedule/reference/#fare_productstxt) AND one line of data in [fare_leg_rules.txt](https://gtfs.org/schedule/reference/#fare_leg_rulestxt) AND (one **from_timeframe_id** value in [fare_leg_rules.txt](https://gtfs.org/schedule/reference/#fare_leg_rulestxt) OR one **to_timeframe_id** value in [fare_leg_rules.txt](https://gtfs.org/schedule/reference/#fare_leg_rulestxt))   | https://gtfs.org/getting_started/features/fares/#time-based-fares  |
 | Fares                    | Zone-Based Fares          | One line of data in [areas.txt](https://gtfs.org/schedule/reference/#areastxt) AND one line of data in [fare_products.txt](https://gtfs.org/schedule/reference/#fare_productstxt) AND one line of data in [fare_leg_rules.txt](https://gtfs.org/schedule/reference/#fare_leg_rulestxt) AND (one **from_area_id** value in [fare_leg_rules.txt](https://gtfs.org/schedule/reference/#fare_leg_rulestxt) OR one **to_area_id** value in [fare_leg_rules.txt](https://gtfs.org/schedule/reference/#fare_leg_rulestxt))   |     https://gtfs.org/getting_started/features/fares/#zone-based-fares |
 | Fares                    | Fare Transfers           | One line of data in [fare_transfer_rules.txt](https://gtfs.org/schedule/reference/#fare_transfer_rulestxt)    |    https://gtfs.org/getting_started/features/fares/#fare-transfers |
+| Fares                    | Contactless EMV Support  | One **cemv_support** value in [agency.txt](https://gtfs.org/schedule/reference/#agencytxt) OR one **cemv_support** value in [routes.txt](https://gtfs.org/schedule/reference/#routestxt) | https://gtfs.org/getting-started/features/fares/#contactless-emv-support |
 | Fares                    | Fares V1                  | One line of data in [fare_attributes.txt](https://gtfs.org/schedule/reference/#fare_attributestxt)   |   https://gtfs.org/getting_started/features/fares/#fares-v1 |
 | Pathways                 | Pathway Connections         | One line of data in [pathways.txt](https://gtfs.org/schedule/reference/#pathwaystxt)     |  https://gtfs.org/getting_started/features/pathways/#pathway-connections |
 | Pathways                 | Pathway Details         | One value of **max_slope**<br/>OR<br/>**min_width** <br/>OR<br/>**length** <br/>OR<br/>**stair_count** in [pathways.txt](https://gtfs.org/schedule/reference/#pathwaystxt) | https://gtfs.org/getting_started/features/pathways/#pathway-details |

main/src/main/java/org/mobilitydata/gtfsvalidator/reportsummary/model/FeedMetadata.java

@@ -273,10 +273,24 @@ private void loadSpecFeaturesBasedOnFieldPresence(GtfsFeedContainer feedContaine
     loadRiderCategoriesFeature(feedContainer);
     loadTimeBasedFaresFeature(feedContainer);
     loadZoneBasedFaresFeature(feedContainer);
+    loadContactlessEMVSupportFeature(feedContainer);
     loadFixedStopsDemandResponseTransit(feedContainer);
     loadCarsAllowedFeature(feedContainer);
   }
 
+  private void loadContactlessEMVSupportFeature(GtfsFeedContainer feedContainer) {
+    specFeatures.put(
+        new FeatureMetadata("Contactless EMV Support", "Fares"),
+        hasAtLeastOneRecordForFields(
+                feedContainer,
+                GtfsAgency.FILENAME,
+                List.of((Function<GtfsAgency, Boolean>) (GtfsAgency::hasCemvSupport)))
+            || hasAtLeastOneRecordForFields(
+                feedContainer,
+                GtfsRoute.FILENAME,
+                List.of((Function<GtfsRoute, Boolean>) (GtfsRoute::hasCemvSupport))));
+  }
+
   /**
    * Determines the presence of the "Cars Allowed" feature, which requires that the field
    * cars_allowed exists in at least one entry in trips.txt.