Dialogue markup and lines, shared common folder, item atlases, ids, seconds and key checks

src/json.h

@@ -94,9 +94,13 @@ inline Color json_color(object source, const char* key, Color fallback = WHITE,
     return {value.r / divisor, value.g / divisor, value.b / divisor, value.a / divisor};
 }
 
+// A list of strings, or one string as a list of it.
 inline std::vector<std::string> json_strings(object source, const char* key)
 {
     std::vector<std::string> values;
+    std::string_view single;
+    if (!source[key].get(single))
+        return {std::string(single)};
     for (element entry : json_array(source, key))
     {
         std::string_view value;
@@ -105,3 +109,11 @@ inline std::vector<std::string> json_strings(object source, const char* key)
     }
     return values;
 }
+
+// Logs any key of an object its reader doesn't know (likely a typo), naming where it is.
+inline void json_keys_check(object source, std::initializer_list<const char*> keys, const std::string& where)
+{
+    for (auto [key, value] : source)
+        if (std::find_if(keys.begin(), keys.end(), [&](const char* known) { return key == known; }) == keys.end())
+            SDL_Log("Unknown key \"%s\" in %s", std::string(key).c_str(), where.c_str());
+}