Index: profile/profile.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/profile/profile.install,v
retrieving revision 1.2
diff -u -r1.2 profile.install
--- profile/profile.install	14 Jul 2006 01:05:09 -0000	1.2
+++ profile/profile.install	26 Jul 2006 14:22:30 -0000
@@ -18,6 +18,7 @@
         register tinyint(1) DEFAULT '0' NOT NULL,
         visibility tinyint(1) DEFAULT '0' NOT NULL,
         autocomplete tinyint(1) DEFAULT '0' NOT NULL,
+        uniquevalue tinyint(1) DEFAULT '0' NOT NULL,
         options text,
         KEY category (category),
         UNIQUE KEY name (name),
@@ -32,4 +33,14 @@
         KEY fid (fid)
       ) /*!40100 DEFAULT CHARACTER SET UTF8 */ ");
   }
+}
+
+
+function profile_update_1() {
+  switch ($GLOBALS['db_type']) {
+    case 'mysql':
+    case 'mysqli':
+      $ret[] = update_sql("ALTER TABLE {profile_fields} ADD uniquevalue tinyint(1) NOT NULL default '0'");
+  }
+  return $ret;
 }
\ No newline at end of file
Index: profile/profile.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/profile/profile.module,v
retrieving revision 1.159
diff -u -r1.159 profile.module
--- profile/profile.module	10 Jul 2006 19:27:52 -0000	1.159
+++ profile/profile.module	26 Jul 2006 14:22:30 -0000
@@ -171,7 +171,7 @@
     case 'form':
       return profile_form_profile($edit, $user, $category);
     case 'validate':
-      return profile_validate_profile($edit, $category);
+      return profile_validate_profile($edit, $user, $category);
     case 'categories':
       return profile_categories();
     case 'delete':
@@ -283,6 +283,10 @@
     '#title' => t('The user must enter a value.'),
     '#default_value' => $edit['required'],
   );
+  $form['fields']['uniquevalue'] = array('#type' => 'checkbox',
+    '#title' => t('The value must be unique.'),
+    '#default_value' => $edit['uniquevalue'],
+  );
   $form['fields']['register'] = array('#type' => 'checkbox',
     '#title' => t('Visible in user registration form.'),
     '#default_value' => $edit['register'],
@@ -334,13 +338,13 @@
  */
 function profile_field_form_submit($form_id, $form_values) {
   if (!isset($form_values['fid'])) {
-    db_query("INSERT INTO {profile_fields} (title, name, explanation, category, type, weight, required, register, visibility, autocomplete, options, page) VALUES ('%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d, %d, '%s', '%s')", $form_values['title'], $form_values['name'], $form_values['explanation'], $form_values['category'], $form_values['type'], $form_values['weight'], $form_values['required'], $form_values['register'], $form_values['visibility'], $form_values['autocomplete'], $form_values['options'], $form_values['page']);
+    db_query("INSERT INTO {profile_fields} (title, name, explanation, category, type, weight, required, register, visibility, autocomplete, uniquevalue, options, page) VALUES ('%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d, %d, %d, '%s', '%s')", $form_values['title'], $form_values['name'], $form_values['explanation'], $form_values['category'], $form_values['type'], $form_values['weight'], $form_values['required'], $form_values['register'], $form_values['visibility'], $form_values['autocomplete'], $form_values['uniquevalue'], $form_values['options'], $form_values['page']);
 
     drupal_set_message(t('The field has been created.'));
     watchdog('profile', t('Profile field %field added under category %category.', array('%field' => theme('placeholder', $form_values['title']), '%category' => theme('placeholder', $form_values['category']))), WATCHDOG_NOTICE, l(t('view'), 'admin/settings/profile'));
   }
   else {
-    db_query("UPDATE {profile_fields} SET title = '%s', name = '%s', explanation = '%s', category = '%s', weight = %d, required = %d, register = %d, visibility = %d, autocomplete = %d, options = '%s', page = '%s' WHERE fid = %d", $form_values['title'], $form_values['name'], $form_values['explanation'], $form_values['category'], $form_values['weight'], $form_values['required'], $form_values['register'], $form_values['visibility'], $form_values['autocomplete'], $form_values['options'], $form_values['page'], $form_values['fid']);
+    db_query("UPDATE {profile_fields} SET title = '%s', name = '%s', explanation = '%s', category = '%s', weight = %d, required = %d, register = %d, visibility = %d, autocomplete = %d, uniquevalue = %d, options = '%s', page = '%s' WHERE fid = %d", $form_values['title'], $form_values['name'], $form_values['explanation'], $form_values['category'], $form_values['weight'], $form_values['required'], $form_values['register'], $form_values['visibility'], $form_values['autocomplete'],$form_values['uniquevalue'],  $form_values['options'], $form_values['page'], $form_values['fid']);
 
     drupal_set_message(t('The field has been updated.'));
   }
@@ -731,7 +735,7 @@
   return $fields;
 }
 
-function profile_validate_profile($edit, $category) {
+function profile_validate_profile($edit, $user, $category) {
   if (arg(0) == 'user' && arg(1) == 'register') {
     $result = db_query('SELECT * FROM {profile_fields} WHERE visibility != %d AND register = 1 ORDER BY category, weight', PROFILE_HIDDEN);
   }
@@ -753,6 +757,11 @@
           form_set_error($field->name, t('The value provided for %field is not a valid URL.', array('%field' => theme('placeholder', $field->title))));
         }
       }
+      if ($field->uniquevalue) {
+        if (db_num_rows(db_query("SELECT uid FROM {profile_values} WHERE uid != %d AND LOWER(value) = LOWER('%s') AND fid = %d", $user->uid, $edit[$field->name], $field->fid)) > 0) {
+          form_set_error($field->name, t('The field %field must be unique.', array('%field' => theme('placeholder', $field->title))));
+        }
+      }
     }
     else if ($field->required && !user_access('administer users')) {
       form_set_error($field->name, t('The field %field is required.', array('%field' => theme('placeholder', $field->title))));