Command to check if number is registered (#391)

* Added the isRegistered command

* Minor fixes

* Corrected description

* Added AsamK's suggestions

Fixes #178

man/signal-cli.1.adoc

@@ -124,6 +124,15 @@ Only works, if this is the master device.
 Specify the device you want to remove.
 Use listDevices to see the deviceIds.
 
+=== getUserStatus
+
+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 the statuses as an array of json objects.
+
 === send
 
 Send a message to another user or group.

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

@@ -11,6 +11,7 @@ public class Commands {
         addCommand("addDevice", new AddDeviceCommand());
         addCommand("block", new BlockCommand());
         addCommand("daemon", new DaemonCommand());
+        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

@@ -0,0 +1,87 @@
+package org.asamk.signal.commands;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import net.sourceforge.argparse4j.impl.Arguments;
+import net.sourceforge.argparse4j.inf.Namespace;
+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 GetUserStatusCommand implements LocalCommand {
+
+    @Override
+    public void attachToSubparser(final Subparser subparser) {
+        subparser.addArgument("number").help("Phone number").nargs("+");
+        subparser.help("Check if the specified phone number/s have been registered");
+        subparser.addArgument("--json")
+                .help("Output received messages in json format, one json object per line.")
+                .action(Arguments.storeTrue());
+    }
+
+    @Override
+    public int handleCommand(final Namespace ns, final Manager m) {
+        if (!m.isRegistered()) {
+            System.err.println("User is not registered.");
+            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);
+
+        // 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 {
+                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 JsonIsRegistered {
+        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

@@ -383,6 +383,28 @@ public class Manager implements Closeable {
         return account.isRegistered();
     }
 
+    /**
+     * This is used for checking a set of phone numbers for registration on Signal
+     *
+     * @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 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 {
         account.setPassword(KeyUtils.createPassword());