fix(external): Allow null replacements

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## Unreleased
 
+- Bugfix: Actually allow null replacements to be sent to the external plugin notifier. (#676)
+
 ## 1.11.2
 
 - Dev: Harden input validation for urls provided to the external plugin notifier. (#672)

src/main/java/dinkplugin/notifiers/ExternalPluginNotifier.java

@@ -17,7 +17,9 @@
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
+import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 
 @Slf4j
 @Singleton
@@ -87,7 +89,7 @@ private void handleNotify(ExternalNotificationRequest input) {
         var player = Utils.getPlayerName(client);
         var template = Template.builder()
             .template(input.getText())
-            .replacements(input.getReplacements())
+            .replacements(Objects.requireNonNullElseGet(input.getReplacements(), () -> new HashMap<>(2)))
             .replacement("%USERNAME%", Replacements.ofText(player))
             .build();
 

src/test/java/dinkplugin/notifiers/ExternalPluginNotifierTest.java

@@ -68,6 +68,89 @@ void testNotify() {
         );
     }
 
+    @Test
+    void testNoReplacements() {
+        // fire event
+        var payload = samplePayload("https://example.com/");
+        payload.remove("replacements");
+        payload.put("text", "text with no replacements");
+        plugin.onPluginMessage(new PluginMessage("dink", "notify", payload));
+
+        // verify notification
+        verifyCreateMessage(
+            "https://example.com/",
+            false,
+            NotificationBody.builder()
+                .type(NotificationType.EXTERNAL_PLUGIN)
+                .playerName(PLAYER_NAME)
+                .customTitle("My Title")
+                .customFooter("Sent by MyExternalPlugin via Dink")
+                .text(
+                    Template.builder()
+                        .template("text with no replacements")
+                        .build()
+                )
+                .extra(new ExternalNotificationData("MyExternalPlugin", List.of(new Field("sample key", "sample value")), Collections.singletonMap("hello", "world")))
+                .build()
+        );
+    }
+
+    @Test
+    void testMissingReplacement() {
+        // fire event
+        var payload = samplePayload("https://example.com/");
+        payload.remove("replacements");
+        payload.put("text", "text with no custom replacement %USERNAME%");
+        plugin.onPluginMessage(new PluginMessage("dink", "notify", payload));
+
+        // verify notification
+        verifyCreateMessage(
+            "https://example.com/",
+            false,
+            NotificationBody.builder()
+                .type(NotificationType.EXTERNAL_PLUGIN)
+                .playerName(PLAYER_NAME)
+                .customTitle("My Title")
+                .customFooter("Sent by MyExternalPlugin via Dink")
+                .text(
+                    Template.builder()
+                        .template("text with no custom replacement %USERNAME%")
+                        .replacement("%USERNAME%", Replacements.ofText(PLAYER_NAME))
+                        .build()
+                )
+                .extra(new ExternalNotificationData("MyExternalPlugin", List.of(new Field("sample key", "sample value")), Collections.singletonMap("hello", "world")))
+                .build()
+        );
+    }
+
+    @Test
+    void testPatternWithoutReplacement() {
+        // fire event
+        var payload = samplePayload("https://example.com/");
+        payload.remove("replacements");
+        payload.put("text", "text with no custom replacement %XD%");
+        plugin.onPluginMessage(new PluginMessage("dink", "notify", payload));
+
+        // verify notification
+        verifyCreateMessage(
+            "https://example.com/",
+            false,
+            NotificationBody.builder()
+                .type(NotificationType.EXTERNAL_PLUGIN)
+                .playerName(PLAYER_NAME)
+                .customTitle("My Title")
+                .customFooter("Sent by MyExternalPlugin via Dink")
+                .text(
+                    Template.builder()
+                        .template("text with no custom replacement %XD%")
+                        .replacement("%USERNAME%", Replacements.ofText(PLAYER_NAME))
+                        .build()
+                )
+                .extra(new ExternalNotificationData("MyExternalPlugin", List.of(new Field("sample key", "sample value")), Collections.singletonMap("hello", "world")))
+                .build()
+        );
+    }
+
     @Test
     void testFallbackUrl() {
         // update config mocks