Initial Project Import

src/org/thoughtcrime/securesms/util/NumberUtil.java

@@ -0,0 +1,54 @@
+/** 
+ * Copyright (C) 2011 Whisper Systems
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.thoughtcrime.securesms.util;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import android.telephony.PhoneNumberUtils;
+
+public class NumberUtil {
+	
+  private static final String emailExpression = "^[\\w\\-]([\\.\\w])+[\\w]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";  
+  private static final Pattern emailPattern   = Pattern.compile(emailExpression, Pattern.CASE_INSENSITIVE);  
+	
+  public static boolean isValidEmail(String number) {
+    Matcher matcher = emailPattern.matcher(number);
+    return matcher.matches();
+  }
+	
+  public static boolean isValidSmsOrEmail(String number) {
+    return PhoneNumberUtils.isWellFormedSmsAddress(number) || isValidEmail(number);
+  }
+	
+  public static String filterNumber(String number) {
+    if (number == null) return null;
+		
+    int length            = number.length();
+    StringBuilder builder = new StringBuilder(length);
+
+    for (int i = 0; i < length; i++) {
+      char character = number.charAt(i);
+
+      if (Character.isDigit(character) || character == '+')
+	builder.append(character);
+    }
+        
+    return builder.toString();
+  }
+	
+}