Added season display to details screen.

veggieseasons/lib/data/veggie.dart

@@ -62,6 +62,13 @@ const Map<VeggieCategory, String> veggieCategoryNames = {
   VeggieCategory.vegetable: 'Vegetable',
 };
 
+const Map<Season, String> seasonNames = {
+  Season.winter: 'Winter',
+  Season.spring: 'Spring',
+  Season.summer: 'Summer',
+  Season.autumn: 'Autumn',
+};
+
 class Veggie {
   Veggie({
     @required this.id,
@@ -99,6 +106,27 @@ class Veggie {
   /// Seasons during which a veggie is harvested.
   final List<Season> seasons;
 
+  /// The same list of seasons, presented as a comma-separated list of strings
+  String get seasonsText {
+    if (seasons.length == 0) {
+      // '' (Shouldn't happen, but just in case)
+      return '';
+    } else if (seasons.length == 1) {
+      // 'Winter'
+      return seasonNames[seasons.first];
+    } else if (seasons.length == 2) {
+      // 'Winter and Spring'
+      return '${seasonNames[seasons.first]} and ${seasonNames[seasons[1]]}';
+    } else {
+      // 'Winter, Spring, and Autumn' (Oxford comma FTW)
+      String str = seasons
+          .sublist(0, seasons.length - 2)
+          .map((s) => seasonNames[s])
+          .join(', ');
+      return '$str, and ${seasonNames[seasons.last]}';
+    }
+  }
+
   /// Percentage of the FDA's recommended daily value of vitamin A for someone
   /// with a 2,000 calorie diet.
   final int vitaminAPercentage;

veggieseasons/lib/screens/details.dart

@@ -189,7 +189,18 @@ class InfoView extends StatelessWidget {
           SizedBox(height: 8.0),
           Text(
             veggie.shortDescription,
-            style: Styles.detailsShortDescriptionText,
+            style: Styles.detailsDescriptionText,
+          ),
+          SizedBox(height: 8.0),
+          Row(
+            children: <Widget>[
+              Text('Available in:', style: Styles.detailsBoldDescriptionText),
+              SizedBox(width: 4.0),
+              Text(
+                veggie.seasonsText,
+                style: Styles.detailsDescriptionText,
+              ),
+            ],
           ),
           ServingInfoChart(veggie, prefs),
           SizedBox(height: 24.0),

veggieseasons/lib/styles.dart

@@ -87,7 +87,7 @@ abstract class Styles {
     fontWeight: FontWeight.normal,
   );
 
-  static const detailsShortDescriptionText = TextStyle(
+  static const detailsDescriptionText = TextStyle(
     color: Color.fromRGBO(0, 0, 0, 0.9),
     fontFamily: 'NotoSans',
     fontSize: 16.0,
@@ -95,6 +95,14 @@ abstract class Styles {
     fontWeight: FontWeight.normal,
   );
 
+  static const detailsBoldDescriptionText = TextStyle(
+    color: Color.fromRGBO(0, 0, 0, 0.9),
+    fontFamily: 'NotoSans',
+    fontSize: 16.0,
+    fontStyle: FontStyle.normal,
+    fontWeight: FontWeight.bold,
+  );
+
   static const detailsServingHeaderText = TextStyle(
     color: Color.fromRGBO(176, 176, 176, 1.0),
     fontFamily: 'NotoSans',