Add configuration by country for sending from alpha IDs

service/src/main/java/org/whispersystems/textsecuregcm/configuration/TwilioAlphaIdConfiguration.java

@@ -0,0 +1,31 @@
+package org.whispersystems.textsecuregcm.configuration;
+
+import com.google.common.annotations.VisibleForTesting;
+
+import javax.validation.constraints.NotEmpty;
+
+public class TwilioAlphaIdConfiguration {
+  @NotEmpty
+  private String prefix;
+
+  @NotEmpty
+  private String value;
+
+  public String getPrefix() {
+    return prefix;
+  }
+
+  @VisibleForTesting
+  public void setPrefix(String prefix) {
+    this.prefix = prefix;
+  }
+
+  public String getValue() {
+    return value;
+  }
+
+  @VisibleForTesting
+  public void setValue(String value) {
+    this.value = value;
+  }
+}

service/src/main/java/org/whispersystems/textsecuregcm/configuration/TwilioConfiguration.java

@@ -18,9 +18,9 @@ package org.whispersystems.textsecuregcm.configuration;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.annotations.VisibleForTesting;
-import org.hibernate.validator.constraints.NotEmpty;
 
 import javax.validation.Valid;
+import javax.validation.constraints.NotEmpty;
 import javax.validation.constraints.NotNull;
 import java.util.List;
 
@@ -53,6 +53,10 @@ public class TwilioConfiguration {
   @Valid
   private RetryConfiguration retry = new RetryConfiguration();
 
+  @NotNull
+  @Valid
+  private List<TwilioAlphaIdConfiguration> alphaId;
+
   public String getAccountId() {
     return accountId;
   }
@@ -115,4 +119,13 @@ public class TwilioConfiguration {
   public void setRetry(RetryConfiguration retry) {
     this.retry = retry;
   }
+
+  public List<TwilioAlphaIdConfiguration> getAlphaId() {
+    return alphaId;
+  }
+
+  @VisibleForTesting
+  public void setAlphaId(List<TwilioAlphaIdConfiguration> alphaId) {
+    this.alphaId = alphaId;
+  }
 }