src/itemstackmetadata.cpp

   1 #include "itemstackmetadata.h"
   2 #include "util/serialize.h"
   3 #include "util/strfnd.h"
   4
   5 #define DESERIALIZE_START '\x01'
   6 #define DESERIALIZE_KV_DELIM '\x02'
   7 #define DESERIALIZE_PAIR_DELIM '\x03'
   8 #define DESERIALIZE_START_STR "\x01"
   9 #define DESERIALIZE_KV_DELIM_STR "\x02"
  10 #define DESERIALIZE_PAIR_DELIM_STR "\x03"
  11
  12 #define TOOLCAP_KEY "tool_capabilities"
  13
  14 void ItemStackMetadata::clear()
  15 {
  16         Metadata::clear();
  17         updateToolCapabilities();
  18 }
  19
  20 bool ItemStackMetadata::setString(const std::string &name, const std::string &var)
  21 {
  22         bool result = Metadata::setString(name, var);
  23         if (name == TOOLCAP_KEY)
  24                 updateToolCapabilities();
  25         return result;
  26 }
  27
  28 void ItemStackMetadata::serialize(std::ostream &os) const
  29 {
  30         std::ostringstream os2;
  31         os2 << DESERIALIZE_START;
  32         for (const auto &stringvar : m_stringvars) {
  33                 if (!stringvar.first.empty() || !stringvar.second.empty())
  34                         os2 << stringvar.first << DESERIALIZE_KV_DELIM
  35                                 << stringvar.second << DESERIALIZE_PAIR_DELIM;
  36         }
  37         os << serializeJsonStringIfNeeded(os2.str());
  38 }
  39
  40 void ItemStackMetadata::deSerialize(std::istream &is)
  41 {
  42         std::string in = deSerializeJsonStringIfNeeded(is);
  43
  44         m_stringvars.clear();
  45
  46         if (!in.empty()) {
  47                 if (in[0] == DESERIALIZE_START) {
  48                         Strfnd fnd(in);
  49                         fnd.to(1);
  50                         while (!fnd.at_end()) {
  51                                 std::string name = fnd.next(DESERIALIZE_KV_DELIM_STR);
  52                                 std::string var  = fnd.next(DESERIALIZE_PAIR_DELIM_STR);
  53                                 m_stringvars[name] = var;
  54                         }
  55                 } else {
  56                         // BACKWARDS COMPATIBILITY
  57                         m_stringvars[""] = in;
  58                 }
  59         }
  60         updateToolCapabilities();
  61 }
  62
  63 void ItemStackMetadata::updateToolCapabilities()
  64 {
  65         if (contains(TOOLCAP_KEY)) {
  66                 toolcaps_overridden = true;
  67                 toolcaps_override = ToolCapabilities();
  68                 std::istringstream is(getString(TOOLCAP_KEY));
  69                 toolcaps_override.deserializeJson(is);
  70         } else {
  71                 toolcaps_overridden = false;
  72         }
  73 }
  74
  75 void ItemStackMetadata::setToolCapabilities(const ToolCapabilities &caps)
  76 {
  77         std::ostringstream os;
  78         caps.serializeJson(os);
  79         setString(TOOLCAP_KEY, os.str());
  80 }
  81
  82 void ItemStackMetadata::clearToolCapabilities()
  83 {
  84         setString(TOOLCAP_KEY, "");
  85 }