save/parse mission prop classes by name

Author: MjnMixael

code/mission/missionparse.cpp

@@ -115,6 +115,7 @@ int Num_teams;
 fix Entry_delay_time = 0;
 
 int Num_unknown_ship_classes;
+int Num_unknown_prop_classes;
 int Num_unknown_weapon_classes;
 int Num_unknown_loadout_classes;
 
@@ -5131,7 +5132,29 @@ void parse_prop(mission* /*pm*/)
 
 	// Maybe do this by name instead?
 	required_string("$Class:");
-	stuff_int(&p.prop_info_index);
+	SCP_string class_name;
+	stuff_string(class_name, F_NAME);
+	int idx = prop_info_lookup(class_name.c_str());
+	if (idx < 0) {
+		SCP_string text;
+		sprintf(text, "Prop \"%s\" has an invalid prop type (props.tbl probably changed).", p.name);
+
+		if (Prop_info.empty()) {
+			text += "  No props.tbl is loaded. Prop will not be added to the mission!";
+		} else {
+			text += "  Prop will be added to the mission with type 0.";
+			idx = 0;
+		}
+
+		if (Fred_running) {
+			Warning(LOCATION, text.c_str());
+		} else {
+			mprintf(("MISSIONS: %s", text.c_str()));
+		}
+
+		Num_unknown_prop_classes++;
+	}
+	p.prop_info_index = idx;
 
 	required_string("$Location:");
 	stuff_vec3d(&p.position);
@@ -5150,6 +5173,12 @@ void parse_prop(mission* /*pm*/)
 		}
 	}
 
+	// if idx is still -1 then we have an empty props.tbl so we parse
+	// everything here and just discard it. A warning has already been generated above.
+	if (idx < 0) {
+		return;
+	}
+
 	Parse_props.emplace_back(p);
 }
 
@@ -6518,6 +6547,7 @@ bool parse_mission(mission *pm, int flags)
 
 	// reset parse error stuff
 	Num_unknown_ship_classes = 0;
+	Num_unknown_prop_classes = 0;
 	Num_unknown_weapon_classes = 0;
 	Num_unknown_loadout_classes = 0;
 
@@ -6557,7 +6587,7 @@ bool parse_mission(mission *pm, int flags)
 	parse_custom_data(pm);
 
 	// if we couldn't load some mod data
-	if ((Num_unknown_ship_classes > 0) || ( Num_unknown_loadout_classes > 0 )) {
+	if ((Num_unknown_ship_classes > 0) || (Num_unknown_prop_classes > 0) || ( Num_unknown_loadout_classes > 0 )) {
 		// if running on standalone server, just print to the log
 		if (Game_mode & GM_STANDALONE_SERVER) {
 			mprintf(("Warning!  Could not load %d ship classes!\n", Num_unknown_ship_classes));
@@ -6571,7 +6601,10 @@ bool parse_mission(mission *pm, int flags)
 			if (Num_unknown_ship_classes > 0) {
 				sprintf(text, "Warning!\n\nFreeSpace was unable to find %d ship class%s while loading this mission.  This can happen if you try to play a %s that is incompatible with the current mod.\n\n", Num_unknown_ship_classes, (Num_unknown_ship_classes > 1) ? "es" : "", (Game_mode & GM_CAMPAIGN_MODE) ? "campaign" : "mission");
 			}
-			else {
+			else if (Num_unknown_prop_classes > 0) {
+				sprintf(text, "Warning!\n\nFreeSpace was unable to find %d prop class%s while loading this mission.  This can happen if you try to play a %s that is incompatible with the current mod.\n\n", Num_unknown_prop_classes, (Num_unknown_prop_classes > 1) ? "es" : "", (Game_mode & GM_CAMPAIGN_MODE) ? "campaign" : "mission");
+			}
+			else if (Num_unknown_loadout_classes > 0) {
 				sprintf(text, "Warning!\n\nFreeSpace was unable to find %d weapon class%s while loading this mission.  This can happen if you try to play a %s that is incompatible with the current mod.\n\n", Num_unknown_loadout_classes, (Num_unknown_loadout_classes > 1) ? "es" : "", (Game_mode & GM_CAMPAIGN_MODE) ? "campaign" : "mission");
 			}
 

code/mission/missionparse.h

@@ -351,6 +351,7 @@ extern fix	Entry_delay_time;
 extern int	Loading_screen_bm_index;
 
 extern int Num_unknown_ship_classes;
+extern int Num_unknown_prop_classes;
 extern int Num_unknown_weapon_classes;
 extern int Num_unknown_loadout_classes;
 

fred2/freddoc.cpp

@@ -246,13 +246,13 @@ bool CFREDDoc::load_mission(const char *pathname, int flags) {
 	}
 
 	// message 2: unknown classes
-	if ((Num_unknown_ship_classes > 0) || (Num_unknown_weapon_classes > 0) || (Num_unknown_loadout_classes > 0)) {
+	if ((Num_unknown_ship_classes > 0) || (Num_unknown_prop_classes > 0) || (Num_unknown_weapon_classes > 0) || (Num_unknown_loadout_classes > 0)) {
 		if (flags & MPF_IMPORT_FSM) {
 			char msg[256];
-			sprintf(msg, "Fred encountered unknown ship/weapon classes when importing \"%s\" (path \"%s\"). You will have to manually edit the converted mission to correct this.", The_mission.name, pathname);
+			sprintf(msg, "Fred encountered unknown ship/prop/weapon classes when importing \"%s\" (path \"%s\"). You will have to manually edit the converted mission to correct this.", The_mission.name, pathname);
 			Fred_view_wnd->MessageBox(msg);
 		} else {
-			Fred_view_wnd->MessageBox("Fred encountered unknown ship/weapon classes when parsing the mission file. This may be due to mission disk data you do not have.");
+			Fred_view_wnd->MessageBox("Fred encountered unknown ship/prop/weapon classes when parsing the mission file. This may be due to mission disk data you do not have.");
 		}
 	}
 

fred2/missionsave.cpp

@@ -5288,7 +5288,7 @@ int CFred_mission_save::save_props()
 
 				required_string_fred("$Class:");
 				parse_comments(2);
-				fout(" %d", p->prop_info_index);
+				fout(" %s", Prop_info[p->prop_info_index].name);
 
 				required_string_fred("$Location:");
 				parse_comments();

qtfred/src/mission/Editor.cpp

@@ -238,22 +238,22 @@ bool Editor::loadMission(const std::string& mission_name, int flags) {
 	}
 
 	// message 2: unknown classes
-	if ((Num_unknown_ship_classes > 0) || (Num_unknown_weapon_classes > 0) || (Num_unknown_loadout_classes > 0)) {
+	if ((Num_unknown_ship_classes > 0) || (Num_unknown_prop_classes > 0) || (Num_unknown_weapon_classes > 0) || (Num_unknown_loadout_classes > 0)) {
 		if (flags & MPF_IMPORT_FSM) {
 			SCP_string msg;
 			sprintf(msg,
-					"Fred encountered unknown ship/weapon classes when importing \"%s\" (path \"%s\"). You will have to manually edit the converted mission to correct this.",
+					"Fred encountered unknown ship/prop/weapon classes when importing \"%s\" (path \"%s\"). You will have to manually edit the converted mission to correct this.",
 					The_mission.name,
 					filepath.c_str());
 
 			_lastActiveViewport->dialogProvider->showButtonDialog(DialogType::Warning,
-																  "Unknown Ship classes",
+																  "Unknown object classes",
 																  msg,
 																  { DialogButton::Ok });
 		} else {
 			_lastActiveViewport->dialogProvider->showButtonDialog(DialogType::Warning,
-																  "Unknown Ship classes",
-																  "Fred encountered unknown ship/weapon classes when parsing the mission file. This may be due to mission disk data you do not have.",
+																  "Unknown object classes",
+																  "Fred encountered unknown ship/prop/weapon classes when parsing the mission file. This may be due to mission disk data you do not have.",
 																  { DialogButton::Ok });
 		}
 	}

qtfred/src/mission/missionsave.cpp

@@ -5481,7 +5481,7 @@ int CFred_mission_save::save_props()
 
 				required_string_fred("$Class:");
 				parse_comments(2);
-				fout(" %d", p->prop_info_index);
+				fout(" %s", Prop_info[p->prop_info_index].name);
 
 				required_string_fred("$Location:");
 				parse_comments();