From 233e5162d15bd5821bc85aac85e443ef9a75e998 Mon Sep 17 00:00:00 2001
From: ggurdin <ggurdin@gmail.com>
Date: Tue, 17 Jun 2025 13:39:46 -0400
Subject: [PATCH] chore: don't show match activities for single-word messages

---
 .../practice_activities/activity_type_enum.dart  | 16 ++++++++++++++++
 .../practice_activities/practice_selection.dart  |  5 +++++
 2 files changed, 21 insertions(+)

diff --git a/lib/pangea/practice_activities/activity_type_enum.dart b/lib/pangea/practice_activities/activity_type_enum.dart
index 2fe80c418..c58bdd4e2 100644
--- a/lib/pangea/practice_activities/activity_type_enum.dart
+++ b/lib/pangea/practice_activities/activity_type_enum.dart
@@ -190,4 +190,20 @@ extension ActivityTypeExtension on ActivityTypeEnum {
         return null; // TODO: Add to L10n
     }
   }
+
+  /// The minimum number of tokens in a message for this activity type to be available.
+  /// Matching activities don't make sense for a single-word message.
+  int get minTokensForMatchActivity {
+    switch (this) {
+      case ActivityTypeEnum.wordMeaning:
+      case ActivityTypeEnum.lemmaId:
+      case ActivityTypeEnum.wordFocusListening:
+        return 2;
+      case ActivityTypeEnum.hiddenWordListening:
+      case ActivityTypeEnum.emoji:
+      case ActivityTypeEnum.morphId:
+      case ActivityTypeEnum.messageMeaning:
+        return 1;
+    }
+  }
 }
diff --git a/lib/pangea/practice_activities/practice_selection.dart b/lib/pangea/practice_activities/practice_selection.dart
index de2aa3709..e7b60be33 100644
--- a/lib/pangea/practice_activities/practice_selection.dart
+++ b/lib/pangea/practice_activities/practice_selection.dart
@@ -155,6 +155,11 @@ class PracticeSelection {
       return [];
     }
 
+    if (tokens.length < activityType.minTokensForMatchActivity) {
+      // if we only have one token, we don't need to do an emoji activity
+      return [];
+    }
+
     return [
       PracticeTarget(
         activityType: activityType,