Added AsamK's suggestions

man/signal-cli.1.adoc

@@ -124,14 +124,14 @@ Only works, if this is the master device.
 Specify the device you want to remove.
 Use listDevices to see the deviceIds.
 
-=== isRegistered
+=== getUserStatus
 
-Checks if a list of phone numbers are registered on Signal or not.
+Uses a list of phone numbers to determine the statuses of those users. Shows if they are registered on the Signal Servers or not.
 
 [NUMBER [NUMBER ...]]::
 One or more numbers to check.
 *--json*::
-Output number registration statuses in json format, one object per line.
+Output the statuses as an array of json objects.
 
 === send
 

src/main/java/org/asamk/signal/commands/Commands.java

@@ -11,7 +11,7 @@ public class Commands {
         addCommand("addDevice", new AddDeviceCommand());
         addCommand("block", new BlockCommand());
         addCommand("daemon", new DaemonCommand());
-        addCommand("isRegistered", new IsRegisteredCommand());
+        addCommand("getUserStatus", new GetUserStatusCommand());
         addCommand("link", new LinkCommand());
         addCommand("listContacts", new ListContactsCommand());
         addCommand("listDevices", new ListDevicesCommand());

src/main/java/org/asamk/signal/commands/GetUserStatusCommand.java

@@ -13,8 +13,13 @@ import net.sourceforge.argparse4j.inf.Subparser;
 import org.asamk.signal.manager.Manager;
 
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.Map;
+import java.util.List;
 
-public class IsRegisteredCommand implements LocalCommand {
+public class GetUserStatusCommand implements LocalCommand {
 
     @Override
     public void attachToSubparser(final Subparser subparser) {
@@ -32,33 +37,48 @@ public class IsRegisteredCommand implements LocalCommand {
             return 1;
         }
 
+        // Setup the json object mapper
         ObjectMapper jsonProcessor = new ObjectMapper();
         jsonProcessor.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); // disable autodetect
         jsonProcessor.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
         jsonProcessor.disable(JsonGenerator.Feature.AUTO_CLOSE_TARGET);
 
-        for (String phone_number : ns.<String>getList("number")) {
+        // Get a map of registration statuses
+        Map<String, Boolean> registered;
+        try {
+            registered = m.areUsersRegistered(new HashSet<>(ns.<String>getList("number")));
+        } catch (IOException e) {
+            System.err.println("Unable to check if users are registered");
+            return 1;
+        }
+
+        // Output
+        if (ns.getBoolean("json")) {
+            List<JsonIsRegistered> objects = new ArrayList<>();
+            for (Map.Entry<String, Boolean> entry : registered.entrySet()) {
+                objects.add(new JsonIsRegistered(entry.getKey(), entry.getValue()));
+            }
+
             try {
-                boolean isRegistered = m.isUserRegistered(phone_number);
-                if (ns.getBoolean("json")) {
-                    JsonIsReceived object = new JsonIsReceived(phone_number, isRegistered);
-                    System.out.println(jsonProcessor.writeValueAsString(object));
-                } else {
-                    System.out.println(phone_number + ": " + isRegistered);
-                }
+                System.out.println(jsonProcessor.writeValueAsString(objects));
             } catch (IOException e) {
                 System.err.println(e.getMessage());
             }
+
+        } else {
+            for (Map.Entry<String, Boolean> entry : registered.entrySet()) {
+                System.out.println(entry.getKey() + ": " + entry.getValue());
+            }
         }
 
         return 0;
     }
 
-    private class JsonIsReceived {
+    private class JsonIsRegistered {
         String name;
         boolean isRegistered;
 
-        public JsonIsReceived(String name, boolean isRegistered) {
+        public JsonIsRegistered(String name, boolean isRegistered) {
             this.name = name;
             this.isRegistered = isRegistered;
         }

src/main/java/org/asamk/signal/manager/Manager.java

@@ -346,14 +346,25 @@ public class Manager implements Closeable {
     }
 
     /**
-     * This is used for checking if someone else's number is registered on Signal
+     * This is used for checking a set of phone numbers for registration on Signal
      *
-     * @param number The phone number in question
-     * @return True if registered, false otherwise
-     * @throws IOException if its unable to check if the user is registered
+     * @param numbers The set of phone number in question
+     * @return A map of numbers to booleans. True if registered, false otherwise. Should never be null
+     * @throws IOException if its unable to check if the users are registered
      */
-    public boolean isUserRegistered(String number) throws IOException {
-        return this.accountManager.getContact(number).orNull() != null;
+    public Map<String, Boolean> areUsersRegistered(Set<String> numbers) throws IOException {
+        // Note "contactDetails" has no optionals. It only gives us info on users who are registered
+        List<ContactTokenDetails> contactDetails = this.accountManager.getContacts(numbers);
+
+        // Make the initial map with all numbers set to false for now
+        Map<String, Boolean> usersRegistered = numbers.stream().collect(Collectors.toMap(x -> x, x -> false));
+
+        // Override the contacts we did obtain
+        for (ContactTokenDetails contactDetail : contactDetails) {
+            usersRegistered.put(contactDetail.getNumber(), true);
+        }
+
+        return usersRegistered;
     }
 
     public void register(boolean voiceVerification, String captcha) throws IOException {