added util::change_mode_message_proxy class

generatlized checkauth_message_proxy and added it to util namespace. To be
later used for constructing setup url in 1.0 checkid_immediate reply.

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/include/opkele/util.h b/include/opkele/util.h
index e9176b0..6f3ddf6 100644
--- a/include/opkele/util.h
+++ b/include/opkele/util.h
@@ -99,53 +99,71 @@ namespace opkele {
          */
         string url_encode(const string& str);
 
         /**
          * Convert number to string
          * @param l number
          * @return string representation
          * @throw failed_conversion in case of failure
          */
         string long_to_string(long l);
         /**
          * Convert string to number
          * @param s string, containing the number
          * @return the number
          * @throw failed_conversion in case of failure
          */
         long string_to_long(const string& s);
 
         /**
          * Encode binary data using base64.
          * @param data pointer to binary data
          * @param length length of data
          * @return encoded data
          */
         string encode_base64(const void *data,size_t length);
         /**
          * Decode binary data from base64 representation.
          * @param data base64-encoded data
          * @param rv container for decoded binary
          */
         void decode_base64(const string& data,vector<unsigned char>& rv);
 
         /**
          * Normalize http(s) URI according to RFC3986, section 6. URI is
          * expected to have scheme: in front of it.
          * @param uri URI
          * @return normalized URI
          * @throw not_implemented in case of non-httpi(s) URI
          * @throw bad_input in case of malformed URI
          */
         string rfc_3986_normalize_uri(const string& uri);
 
         string& strip_uri_fragment_part(string& uri);
 
         string abi_demangle(const char* mn);
 
         string base64_signature(const assoc_t& assoc,const basic_openid_message& om);
 
+        class change_mode_message_proxy : public basic_openid_message {
+            public:
+                const basic_openid_message& x;
+                const string& mode;
+
+                change_mode_message_proxy(const basic_openid_message& xx,const string& m) : x(xx), mode(m) { }
+
+                bool has_field(const string& n) const { return x.has_field(n); }
+                const string& get_field(const string& n) const {
+                    return (n=="mode")?mode:x.get_field(n); }
+                bool has_ns(const string& uri) const {return x.has_ns(uri); }
+                string get_ns(const string& uri) const { return x.get_ns(uri); }
+                fields_iterator fields_begin() const {
+                    return x.fields_begin(); }
+                fields_iterator fields_end() const {
+                    return x.fields_end(); }
+        };
+
     }
 
 }
 
 #endif /* __OPKELE_UTIL_H */