/*
* Data Store
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/datastor.h>
#include <botan/exceptn.h>
#include <botan/parsing.h>
#include <botan/hex.h>
#include <botan/internal/stl_util.h>

namespace Botan {

/*
* Data_Store Equality Comparison
*/
bool Data_Store::operator==(const Data_Store& other) const
   {
   return (m_contents == other.m_contents);
   }

/*
* Check if this key has at least one value
*/
bool Data_Store::has_value(const std::string& key) const
   {
   return (m_contents.lower_bound(key) != m_contents.end());
   }

/*
* Search based on an arbitrary predicate
*/
std::multimap<std::string, std::string> Data_Store::search_for(
   std::function<bool (std::string, std::string)> predicate) const
   {
   std::multimap<std::string, std::string> out;

   for(auto i = m_contents.begin(); i != m_contents.end(); ++i)
      if(predicate(i->first, i->second))
         out.insert(std::make_pair(i->first, i->second));

   return out;
   }

/*
* Search based on key equality
*/
std::vector<std::string> Data_Store::get(const std::string& looking_for) const
   {
   std::vector<std::string> out;
   auto range = m_contents.equal_range(looking_for);
   for(auto i = range.first; i != range.second; ++i)
      out.push_back(i->second);
   return out;
   }

/*
* Get a single atom
*/
std::string Data_Store::get1(const std::string& key) const
   {
   std::vector<std::string> vals = get(key);

   if(vals.empty())
      throw Invalid_State("Data_Store::get1: No values set for " + key);
   if(vals.size() > 1)
      throw Invalid_State("Data_Store::get1: More than one value for " + key);

   return vals[0];
   }

std::string Data_Store::get1(const std::string& key,
                             const std::string& default_value) const
   {
   std::vector<std::string> vals = get(key);

   if(vals.size() > 1)
      throw Invalid_State("Data_Store::get1: More than one value for " + key);

   if(vals.empty())
      return default_value;

   return vals[0];
   }

/*
* Get a single std::vector atom
*/
std::vector<uint8_t>
Data_Store::get1_memvec(const std::string& key) const
   {
   std::vector<std::string> vals = get(key);

   if(vals.empty())
      return std::vector<uint8_t>();

   if(vals.size() > 1)
      throw Invalid_State("Data_Store::get1_memvec: Multiple values for " +
                          key);

   return hex_decode(vals[0]);
   }

/*
* Get a single uint32_t atom
*/
uint32_t Data_Store::get1_uint32(const std::string& key,
                                 uint32_t default_val) const
   {
   std::vector<std::string> vals = get(key);

   if(vals.empty())
      return default_val;
   else if(vals.size() > 1)
      throw Invalid_State("Data_Store::get1_uint32: Multiple values for " + key);

   return to_u32bit(vals[0]);
   }

/*
* Insert a single key and value
*/
void Data_Store::add(const std::string& key, const std::string& val)
   {
   multimap_insert(m_contents, key, val);
   }

/*
* Insert a single key and value
*/
void Data_Store::add(const std::string& key, uint32_t val)
   {
   add(key, std::to_string(val));
   }

/*
* Insert a single key and value
*/
void Data_Store::add(const std::string& key, const secure_vector<uint8_t>& val)
   {
   add(key, hex_encode(val.data(), val.size()));
   }

void Data_Store::add(const std::string& key, const std::vector<uint8_t>& val)
   {
   add(key, hex_encode(val.data(), val.size()));
   }

/*
* Insert a mapping of key/value pairs
*/
void Data_Store::add(const std::multimap<std::string, std::string>& in)
   {
   std::multimap<std::string, std::string>::const_iterator i = in.begin();
   while(i != in.end())
      {
      m_contents.insert(*i);
      ++i;
      }
   }

/*
* Create and populate a X509_DN
*/
X509_DN create_dn(const Data_Store& info)
   {
   auto names = info.search_for(
      [](const std::string& key, const std::string&)
      {
         return (key.find("X520.") != std::string::npos);
      });

   X509_DN dn;

   for(auto i = names.begin(); i != names.end(); ++i)
      dn.add_attribute(i->first, i->second);

   return dn;
   }

/*
* Create and populate an AlternativeName
*/
AlternativeName create_alt_name(const Data_Store& info)
   {
   auto names = info.search_for(
      [](const std::string& key, const std::string&)
      {
         return (key == "RFC822" ||
                 key == "DNS" ||
                 key == "URI" ||
                 key == "IP");
      });

   AlternativeName alt_name;

   for(auto i = names.begin(); i != names.end(); ++i)
      alt_name.add_attribute(i->first, i->second);

   return alt_name;
   }

}