/*
- * Copyright 2000, OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 2000-2002, OpenLDAP Foundation, All Rights Reserved.
  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
  */
 
 
 using namespace std;
 
+// little helper function for doing case insensitve string comparison
+bool nocase_compare(char c1, char c2);
+
 LDAPAttributeList::LDAPAttributeList(){
     DEBUG(LDAP_DEBUG_CONSTRUCT,
             "LDAPAttributeList::LDAPAttributList( )" << endl);
     return m_attrs.end();
 }
 
+const LDAPAttribute* LDAPAttributeList::getAttributeByName(
+       const string& name) const {
+    DEBUG(LDAP_DEBUG_TRACE,"LDAPAttribute::getAttributeByName()" << endl);
+    DEBUG(LDAP_DEBUG_TRACE | LDAP_DEBUG_PARAMETER,
+            "   name:" << name << endl);
+    AttrList::const_iterator i;
+    for( i = m_attrs.begin(); i != m_attrs.end(); i++){
+       const std::string& tmpType = i->getName();
+       if(name.size() == tmpType.size()){
+           if(equal(name.begin(), name.end(), tmpType.begin(),
+                   nocase_compare)){
+               return &(*i);
+               DEBUG(LDAP_DEBUG_TRACE,"    found:" << name << endl);
+           }
+       }
+    }
+    return 0;
+}
+
 void LDAPAttributeList::addAttribute(const LDAPAttribute& attr){
     DEBUG(LDAP_DEBUG_TRACE,"LDAPAttribute::addAttribute()" << endl);
     DEBUG(LDAP_DEBUG_TRACE | LDAP_DEBUG_PARAMETER,
             "   attr:" << attr << endl);
-    m_attrs.push_back(attr);
+    const std::string attrType = attr.getName();
+    const std::string::size_type attrLen = attrType.size();
+    std::string::size_type tmpAttrLen = 0;
+    bool done=false;
+    AttrList::iterator i;
+    for( i=m_attrs.begin(); i != m_attrs.end(); i++ ){
+       const std::string tmpAttrType = i->getName();
+       tmpAttrLen = tmpAttrType.size();
+       if(tmpAttrLen == attrLen){
+           if(equal(tmpAttrType.begin(), tmpAttrType.end(), attrType.begin(),
+                   nocase_compare)){
+               const StringList& values = attr.getValues();
+               StringList::const_iterator j;
+               for(j = values.begin(); j != values.end(); j++){
+                   i->addValue(*j);
+               }
+               DEBUG(LDAP_DEBUG_TRACE,"Attribute" << i->getName() 
+                       << "already present" << endl);
+               done=true;
+               break; // The AttributeType was already present,
+                      // we are done here
+           }
+       }
+    }
+    if(! done){
+       m_attrs.push_back(attr);
+    }
 }
 
 
     return s;
 }
 
+bool nocase_compare( char c1, char c2){
+    return toupper(c1) == toupper(c2);
+}
+
 
 /*
- * Copyright 2000, OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 2000-2002, OpenLDAP Foundation, All Rights Reserved.
  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
  */
 
 
 #include <ldap.h>
 #include <list>
+#include <string>
+
 class LDAPAttribute;
 class LDAPAsynConnection;
 class LDAPMsg;
 
     public :
         typedef AttrList::const_iterator const_iterator;
+       typedef AttrList::iterator iterator;
 
 
         /**
          */
         const_iterator end() const;
 
+       /**
+        * Get an Attribute by its AttributeType
+        * @param name The name of the Attribute to look for
+        * @return a pointer to the LDAPAttribute with the AttributeType 
+        *      "name" or 0, if there is no Attribute of that Type
+        */
+       const LDAPAttribute* getAttributeByName(const std::string& name) const;
+
+
         /**
          * Adds one element to the end of the list.
          * @param attr The attribute to add to the list.
         friend std::ostream& operator << (std::ostream& s, 
                                          const LDAPAttributeList& al);
 };
+
 #endif // LDAP_ATTRIBUTE_LIST_H