Support include_external_user_ids for targeting external user IDs.

Author: ndarilek

src/main/java/com/currencyfair/onesignal/model/notification/Notification.java

@@ -88,6 +88,18 @@ public class Notification {
     @JsonProperty("include_player_ids")
     private List<String> includePlayerIds;
 
+    /**
+     * RECOMMENDED - Target specific devices by custom user IDs assigned via API.
+     * <p>
+     * Do not combine with other targeting parameters. Not compatible with any other targeting parameters.
+     * <p>
+     * Example: {@code [“custom-id-assigned-by-api”]}
+     * <p>
+     * <i>Limit of 2,000 entries per REST API call</i>
+     */
+    @JsonProperty("include_external_user_ids")
+    private List<String> includeExternalUserIds;
+
 
 
     // COMMON PARAMETERS
@@ -721,6 +733,14 @@ public void setIncludePlayerIds(List<String> includePlayerIds) {
         this.includePlayerIds = includePlayerIds;
     }
 
+    public List<String> getIncludeExternalUserIds() {
+        return includeExternalUserIds;
+    }
+
+    public void setIncludeExternalUserIds(List<String> externalUserIds) {
+        this.includeExternalUserIds = includeExternalUserIds;
+    }
+
     public String getAppId() {
         return appId;
     }

src/main/java/com/currencyfair/onesignal/model/notification/NotificationRequestBuilder.java

@@ -35,6 +35,7 @@ public final class NotificationRequestBuilder {
     private List<String> excludedSegments = new ArrayList<>();
     private List<Filter> filters = new ArrayList<>();
     private List<String> includePlayerIds = new ArrayList<>();
+    private List<String> includeExternalUserIds = new ArrayList<>();
     private String appId;
     private List<String> appIds;
     private Map<String, String> contents = new HashMap<>();
@@ -170,6 +171,18 @@ public NotificationRequestBuilder withIncludePlayerId(String includePlayerId) {
         return this;
     }
 
+    public NotificationRequestBuilder withIncludeExternalUserIds(List<String> includeExternalUserIds) {
+        this.includeExternalUserIds = includeExternalUserIds;
+        return this;
+    }
+
+    public NotificationRequestBuilder withIncludeExternalUserId(String includeExternalUserId) {
+        if (StringUtils.isNotBlank(includeExternalUserId)) {
+            includeExternalUserIds.add(includeExternalUserId);
+        }
+        return this;
+    }
+
     public NotificationRequestBuilder withAppId(String appId) {
         this.appId = appId;
         return this;
@@ -515,6 +528,7 @@ public NotificationRequest build() {
         notificationRequest.setExcludedSegments(excludedSegments);
         notificationRequest.setFilters(filters);
         notificationRequest.setIncludePlayerIds(includePlayerIds);
+        notificationRequest.setIncludeExternalUserIds(includeExternalUserIds);
         notificationRequest.setAppId(appId);
         notificationRequest.setAppIds(appIds);
         notificationRequest.setContents(contents);