Add RecipientIdentifier as external Manager interface

src/main/java/org/asamk/signal/util/CommandUtil.java

@@ -0,0 +1,99 @@
+package org.asamk.signal.util;
+
+import org.asamk.signal.commands.exceptions.UserErrorException;
+import org.asamk.signal.manager.Manager;
+import org.asamk.signal.manager.api.RecipientIdentifier;
+import org.asamk.signal.manager.groups.GroupId;
+import org.asamk.signal.manager.groups.GroupIdFormatException;
+import org.whispersystems.signalservice.api.util.InvalidNumberException;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class CommandUtil {
+
+    private CommandUtil() {
+    }
+
+    public static Set<RecipientIdentifier> getRecipientIdentifiers(
+            final Manager m,
+            final boolean isNoteToSelf,
+            final List<String> recipientStrings,
+            final List<String> groupIdStrings
+    ) throws UserErrorException {
+        final var recipientIdentifiers = new HashSet<RecipientIdentifier>();
+        if (isNoteToSelf) {
+            recipientIdentifiers.add(new RecipientIdentifier.NoteToSelf());
+        }
+        if (recipientStrings != null) {
+            final var localNumber = m.getUsername();
+            recipientIdentifiers.addAll(CommandUtil.getSingleRecipientIdentifiers(recipientStrings, localNumber));
+        }
+        if (groupIdStrings != null) {
+            recipientIdentifiers.addAll(CommandUtil.getGroupIdentifiers(groupIdStrings));
+        }
+
+        if (recipientIdentifiers.isEmpty()) {
+            throw new UserErrorException("No recipients given");
+        }
+        return recipientIdentifiers;
+    }
+
+    public static Set<RecipientIdentifier.Group> getGroupIdentifiers(Collection<String> groupIdStrings) throws UserErrorException {
+        if (groupIdStrings == null) {
+            return Set.of();
+        }
+        final var groupIds = new HashSet<RecipientIdentifier.Group>();
+        for (final var groupIdString : groupIdStrings) {
+            groupIds.add(new RecipientIdentifier.Group(getGroupId(groupIdString)));
+        }
+        return groupIds;
+    }
+
+    public static Set<GroupId> getGroupIds(Collection<String> groupIdStrings) throws UserErrorException {
+        if (groupIdStrings == null) {
+            return Set.of();
+        }
+        final var groupIds = new HashSet<GroupId>();
+        for (final var groupIdString : groupIdStrings) {
+            groupIds.add(getGroupId(groupIdString));
+        }
+        return groupIds;
+    }
+
+    public static GroupId getGroupId(String groupId) throws UserErrorException {
+        if (groupId == null) {
+            return null;
+        }
+        try {
+            return GroupId.fromBase64(groupId);
+        } catch (GroupIdFormatException e) {
+            throw new UserErrorException("Invalid group id: " + e.getMessage());
+        }
+    }
+
+    public static Set<RecipientIdentifier.Single> getSingleRecipientIdentifiers(
+            final Collection<String> recipientStrings, final String localNumber
+    ) throws UserErrorException {
+        if (recipientStrings == null) {
+            return Set.of();
+        }
+        final var identifiers = new HashSet<RecipientIdentifier.Single>();
+        for (var recipientString : recipientStrings) {
+            identifiers.add(getSingleRecipientIdentifier(recipientString, localNumber));
+        }
+        return identifiers;
+    }
+
+    public static RecipientIdentifier.Single getSingleRecipientIdentifier(
+            final String recipientString, final String localNumber
+    ) throws UserErrorException {
+        try {
+            return RecipientIdentifier.Single.fromString(recipientString, localNumber);
+        } catch (InvalidNumberException e) {
+            throw new UserErrorException("Invalid phone number '" + recipientString + "': " + e.getMessage());
+        }
+    }
+}