Add DynamicPreRegistrationExperimentEnrollmentConfiguration

service/src/main/java/org/whispersystems/textsecuregcm/configuration/dynamic/DynamicConfiguration.java

@@ -14,6 +14,10 @@ public class DynamicConfiguration {
   @Valid
   private Map<String, DynamicExperimentEnrollmentConfiguration> experiments = Collections.emptyMap();
 
+  @JsonProperty
+  @Valid
+  private Map<String, DynamicPreRegistrationExperimentEnrollmentConfiguration> preRegistrationExperiments = Collections.emptyMap();
+
   @JsonProperty
   @Valid
   private DynamicRateLimitsConfiguration limits = new DynamicRateLimitsConfiguration();
@@ -38,6 +42,11 @@ public class DynamicConfiguration {
     return Optional.ofNullable(experiments.get(experimentName));
   }
 
+  public Optional<DynamicPreRegistrationExperimentEnrollmentConfiguration> getPreRegistrationEnrollmentConfiguration(
+      final String experimentName) {
+    return Optional.ofNullable(preRegistrationExperiments.get(experimentName));
+  }
+
   public DynamicRateLimitsConfiguration getLimits() {
     return limits;
   }

service/src/main/java/org/whispersystems/textsecuregcm/configuration/dynamic/DynamicPreRegistrationExperimentEnrollmentConfiguration.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2021 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.whispersystems.textsecuregcm.configuration.dynamic;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import java.util.Collections;
+import java.util.Set;
+import javax.validation.Valid;
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+
+public class DynamicPreRegistrationExperimentEnrollmentConfiguration {
+
+  @JsonProperty
+  @Valid
+  private Set<String> enrolledE164s = Collections.emptySet();
+
+  @JsonProperty
+  @Valid
+  private Set<String> excludedCountryCodes = Collections.emptySet();
+
+  @JsonProperty
+  @Valid
+  private Set<String> includedCountryCodes = Collections.emptySet();
+
+  @JsonProperty
+  @Valid
+  @Min(0)
+  @Max(100)
+  private int enrollmentPercentage = 0;
+
+  public Set<String> getEnrolledE164s() {
+    return enrolledE164s;
+  }
+
+  public Set<String> getExcludedCountryCodes() {
+    return excludedCountryCodes;
+  }
+
+  public Set<String> getIncludedCountryCodes() {
+    return includedCountryCodes;
+  }
+
+  public int getEnrollmentPercentage() {
+    return enrollmentPercentage;
+  }
+}