Data for campaign win/loss conditions. All campaigns should now have

correct conditions.
All custom conditions are now validated using schema.

Note that some of scenarios may not work due to instant win/loss, mostly
because some placeholders fail to import (Mantis #1643)

config/schemas/mapHeader.json

@@ -0,0 +1,51 @@
+{
+	"type":"object",
+	"$schema": "http://json-schema.org/draft-04/schema",
+	"title" : "VCMI map header format",
+	"description" : "Part of map in json format, defines core settings of the map",
+	"required": [ "defeatIconIndex", "defeatString", "victoryIconIndex", "victoryString" ],
+
+	"additionalProperties" : false,
+	"properties":{
+		"defeatIconIndex": {
+			"type":"number"
+		},
+		"defeatString": {
+			"type":"string"
+		},
+		"victoryIconIndex": {
+			"type":"number"
+		},
+		"victoryString": {
+			"type":"string"
+		},
+		"triggeredEvents" : {
+			"type" : "object",
+
+			"additionalProperties" : {
+				"type" : "object",
+				"additionalProperties" : "false",
+
+				"properties" : {
+					"required" : [ "condition", "message", "effect" ],
+
+					"condition" : { "type" : "array" },
+
+					"description" : { "type" : "string" },
+					"message" : { "type" : "string" },
+					"effect" : {
+						"type" : "object",
+						"additionalProperties" : false,
+
+						"required" : [ "type", "messageToSend" ],
+
+						"properties" : {
+							"type" : { "type" : "string" },
+							"messageToSend" : { "type" : "string" },
+						}
+					}
+				}
+			}
+		}
+	}
+}

lib/mapping/CMapService.cpp

@@ -86,10 +86,22 @@ std::unique_ptr<IMapLoader> CMapService::getMapLoader(std::unique_ptr<CInputStre
 	}
 }
 
+static JsonNode loadPatches(std::string path)
+{
+	JsonNode node = JsonUtils::assembleFromFiles(path);
+	for (auto & entry : node.Struct())
+		JsonUtils::validate(entry.second, "vcmi:mapHeader", "patch for " + entry.first);
+	return node;
+}
+
 std::unique_ptr<IMapPatcher> CMapService::getMapPatcher(std::string scenarioName)
 {
+	static JsonNode node;
+
+	if (node.isNull())
+		node = loadPatches("config/mapOverrides.json");
+
 	boost::to_lower(scenarioName);
 	logGlobal->debugStream() << "Request to patch map " << scenarioName;
-	JsonNode node = JsonUtils::assembleFromFiles("config/mapOverrides.json");
 	return std::unique_ptr<IMapPatcher>(new CMapLoaderJson(node[scenarioName]));
 }