1 files changed, 42 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/KeyRing.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/KeyRing.java
index dc0c722b9..47b827677 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/KeyRing.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/KeyRing.java
@@ -2,6 +2,9 @@ package org.sufficientlysecure.keychain.pgp;
 
 import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
 
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 /** An abstract KeyRing.
  *
  * This is an abstract class for all KeyRing constructs. It serves as a common
@@ -19,6 +22,10 @@ public abstract class KeyRing {
 
     abstract public String getPrimaryUserId() throws PgpGeneralException;
 
+    public String[] getSplitPrimaryUserId() throws PgpGeneralException {
+        return splitUserId(getPrimaryUserId());
+    }
+
     abstract public boolean isRevoked() throws PgpGeneralException;
 
     abstract public boolean canCertify() throws PgpGeneralException;
@@ -33,4 +40,39 @@ public abstract class KeyRing {
 
     abstract public int getVerified() throws PgpGeneralException;
 
+    private static final Pattern USER_ID_PATTERN = Pattern.compile("^(.*?)(?: \\((.*)\\))?(?: <(.*)>)?$");
+
+    /**
+     * Splits userId string into naming part, email part, and comment part
+     *
+     * @param userId
+     * @return array with naming (0), email (1), comment (2)
+     */
+    public static String[] splitUserId(String userId) {
+        String[] result = new String[]{null, null, null};
+
+        if (userId == null || userId.equals("")) {
+            return result;
+        }
+
+        /*
+         * User ID matching:
+         * http://fiddle.re/t4p6f
+         *
+         * test cases:
+         * "Max Mustermann (this is a comment) <max@example.com>"
+         * "Max Mustermann <max@example.com>"
+         * "Max Mustermann (this is a comment)"
+         * "Max Mustermann [this is nothing]"
+         */
+        Matcher matcher = USER_ID_PATTERN.matcher(userId);
+        if (matcher.matches()) {
+            result[0] = matcher.group(1);
+            result[1] = matcher.group(3);
+            result[2] = matcher.group(2);
+        }
+
+        return result;
+    }
+
 }