Allow overriding tool capabilities through itemstack metadata

This makes it possible to modify the tool capabilities of individual
itemstacks by calling a method on itemstack metadata references.

1 files changed, 85 insertions, 0 deletions

diff --git a/src/tool.cpp b/src/tool.cpp
index 839b1e387..2d2f9dee5 100644
--- a/src/tool.cpp
+++ b/src/tool.cpp
@@ -25,6 +25,34 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "util/serialize.h"
 #include "util/numeric.h"
 
+void ToolGroupCap::toJson(Json::Value &object) const
+{
+	object["maxlevel"] = maxlevel;
+	object["uses"] = uses;
+
+	Json::Value times_object;
+	for (auto time : times)
+		times_object[time.first] = time.second;
+	object["times"] = times_object;
+}
+
+void ToolGroupCap::fromJson(const Json::Value &json)
+{
+	if (json.isObject()) {
+		if (json["maxlevel"].isInt())
+			maxlevel = json["maxlevel"].asInt();
+		if (json["uses"].isInt())
+			uses = json["uses"].asInt();
+		const Json::Value &times_object = json["times"];
+		if (times_object.isArray()) {
+			Json::ArrayIndex size = times_object.size();
+			for (Json::ArrayIndex i = 0; i < size; ++i)
+				if (times_object[i].isDouble())
+					times[i] = times_object[i].asFloat();
+		}
+	}
+}
+
 void ToolCapabilities::serialize(std::ostream &os, u16 protocol_version) const
 {
 	writeU8(os, 3); // protocol_version >= 36
@@ -84,6 +112,63 @@ void ToolCapabilities::deSerialize(std::istream &is)
 	}
 }
 
+void ToolCapabilities::serializeJson(std::ostream &os) const
+{
+	Json::Value root;
+	root["full_punch_interval"] = full_punch_interval;
+	root["max_drop_level"] = max_drop_level;
+
+	Json::Value groupcaps_object;
+	for (auto groupcap : groupcaps) {
+		groupcap.second.toJson(groupcaps_object[groupcap.first]);
+	}
+	root["groupcaps"] = groupcaps_object;
+
+	Json::Value damage_groups_object;
+	DamageGroup::const_iterator dgiter;
+	for (dgiter = damageGroups.begin(); dgiter != damageGroups.end(); ++dgiter) {
+		damage_groups_object[dgiter->first] = dgiter->second;
+	}
+	root["damage_groups"] = damage_groups_object;
+
+	os << root;
+}
+
+void ToolCapabilities::deserializeJson(std::istream &is)
+{
+	Json::Value root;
+	is >> root;
+	if (root.isObject()) {
+		if (root["full_punch_interval"].isDouble())
+			full_punch_interval = root["full_punch_interval"].asFloat();
+		if (root["max_drop_level"].isInt())
+			max_drop_level = root["max_drop_level"].asInt();
+
+		Json::Value &groupcaps_object = root["groupcaps"];
+		if (groupcaps_object.isObject()) {
+			Json::ValueIterator gciter;
+			for (gciter = groupcaps_object.begin();
+					gciter != groupcaps_object.end(); ++gciter) {
+				ToolGroupCap groupcap;
+				groupcap.fromJson(*gciter);
+				groupcaps[gciter.key().asString()] = groupcap;
+			}
+		}
+
+		Json::Value &damage_groups_object = root["damage_groups"];
+		if (damage_groups_object.isObject()) {
+			Json::ValueIterator dgiter;
+			for (dgiter = damage_groups_object.begin();
+					dgiter != damage_groups_object.end(); ++dgiter) {
+				Json::Value &value = *dgiter;
+				if (value.isInt())
+					damageGroups[dgiter.key().asString()] =
+						value.asInt();
+			}
+		}
+	}
+}
+
 DigParams getDigParams(const ItemGroupList &groups,
 		const ToolCapabilities *tp, float time_from_last_punch)
 {