Change milking to an activity, restore udders on load catchup (#37523)

data/json/effects.json

@@ -1680,11 +1680,11 @@
     "rating": "bad"
   },
   {
-    "type": "effect_type",
-    "id": "milked",
-    "name": [ "Milked" ],
-    "desc": [ "The creature has been partially or fully milked." ],
-    "max_duration": "1 d"
+  "type": "effect_type",
+  "id": "milked",
+  "name": [ "Milked" ],
+  "desc": [ "The creature has been partially or fully milked." ],
+  "max_duration": "1 d"
   },
   {
     "type": "effect_type",

data/json/monsters/mammal.json

@@ -344,7 +344,7 @@
     "melee_cut": 6,
     "dodge": 2,
     "armor_bash": 2,
-    "starting_ammo": { "milk_raw": 10 },
+    "starting_ammo": { "milk_raw": 40 },
     "path_settings": { "max_dist": 10 },
     "anger_triggers": [ "HURT" ],
     "fear_triggers": [ "PLAYER_CLOSE" ],
@@ -1876,7 +1876,7 @@
     "melee_dice_sides": 6,
     "melee_cut": 2,
     "dodge": 2,
-    "starting_ammo": { "milk_raw": 2 },
+    "starting_ammo": { "milk_raw": 5 },
     "anger_triggers": [  ],
     "harvest": "mammal_large_wool",
     "reproduction": { "baby_monster": "mon_sheep_lamb", "baby_count": 1, "baby_timer": 275 },

data/json/player_activities.json

@@ -448,6 +448,16 @@
     "based_on": "neither",
     "no_resume": true
   },
+  {
+    "id": "ACT_MILK",
+    "type": "activity_type",
+    "activity_level": "LIGHT_EXERCISE",
+    "verb": "milking an animal",
+    "suspendable": false,
+    "rooted": true,
+    "based_on": "time",
+    "no_resume": true
+  },
   {
     "id": "ACT_HOTWIRE_CAR",
     "type": "activity_type",

src/activity_handlers.cpp

@@ -224,6 +224,7 @@ activity_handlers::finish_functions = {
     { ACT_WASH, washing_finish },
     { ACT_HACKSAW, hacksaw_finish },
     { ACT_CHOP_TREE, chop_tree_finish },
+    { ACT_MILK, milk_finish },
     { ACT_CHOP_LOGS, chop_logs_finish },
     { ACT_CHOP_PLANKS, chop_planks_finish },
     { ACT_JACKHAMMER, jackhammer_finish },
@@ -1274,6 +1275,45 @@ void activity_handlers::butcher_finish( player_activity *act, player *p )
     resume_for_multi_activities( *p );
 }
 
+void activity_handlers::milk_finish( player_activity *act, player *p )
+{
+    if( act->coords.empty() ) {
+        debugmsg( "milking activity with no position of monster stored" );
+        return;
+    }
+    const tripoint source_pos = g->m.getlocal( act->coords.at( 0 ) );
+    monster *source_mon = g->critter_at<monster>( source_pos );
+    if( source_mon == nullptr ) {
+        debugmsg( "could not find source creature for liquid transfer" );
+        return;
+    }
+    auto milked_item = source_mon->ammo.find( "milk_raw" );
+    if( milked_item == source_mon->ammo.end() ) {
+        debugmsg( "animal has no milk ammo type" );
+        return;
+    }
+    if( milked_item->second <= 0 ) {
+        debugmsg( "started milking but udders are now empty before milking finishes" );
+        return;
+    }
+    item milk( milked_item->first, calendar::turn, milked_item->second );
+    milk.set_item_temperature( 311.75 );
+    if( liquid_handler::handle_liquid( milk, nullptr, 1, nullptr, nullptr, -1, source_mon ) ) {
+        milked_item->second = 0;
+        if( milk.charges > 0 ) {
+            milked_item->second = milk.charges;
+        } else {
+            p->add_msg_if_player( _( "The %s's udders run dry." ), source_mon->get_name() );
+        }
+    }
+    // if the monster was not manually tied up, but needed to be fixed in place temporarily then
+    // remove that now.
+    if( !act->str_values.empty() && act->str_values[0] == "temp_tie" ) {
+        source_mon->remove_effect( effect_tied );
+    }
+    act->set_to_null();
+}
+
 void activity_handlers::fill_liquid_do_turn( player_activity *act, player *p )
 {
     player_activity &act_ref = *act;

src/activity_handlers.h

@@ -206,6 +206,7 @@ void pickaxe_finish( player_activity *act, player *p );
 void reload_finish( player_activity *act, player *p );
 void start_fire_finish( player_activity *act, player *p );
 void train_finish( player_activity *act, player *p );
+void milk_finish( player_activity *act, player *p );
 void vehicle_finish( player_activity *act, player *p );
 void start_engines_finish( player_activity *act, player *p );
 void churn_finish( player_activity *act, player *p );

src/cata_string_consts.h

@@ -36,6 +36,7 @@ static const activity_id ACT_FERTILIZE_PLOT( "ACT_FERTILIZE_PLOT" );
 static const activity_id ACT_FETCH_REQUIRED( "ACT_FETCH_REQUIRED" );
 static const activity_id ACT_FIELD_DRESS( "ACT_FIELD_DRESS" );
 static const activity_id ACT_FILL_LIQUID( "ACT_FILL_LIQUID" );
+static const activity_id ACT_MILK( "ACT_MILK" );
 static const activity_id ACT_FILL_PIT( "ACT_FILL_PIT" );
 static const activity_id ACT_FIND_MOUNT( "ACT_FIND_MOUNT" );
 static const activity_id ACT_FIRSTAID( "ACT_FIRSTAID" );

src/game.cpp

@@ -4111,7 +4111,11 @@ void game::monmove()
         }
 
         m.creature_in_field( critter );
-
+        if( calendar::once_every( 1_days ) ) {
+            critter.refill_udders();
+            critter.try_biosignature();
+            critter.try_reproduce();
+        }
         while( critter.moves > 0 && !critter.is_dead() && !critter.has_effect( effect_ridden ) ) {
             critter.made_footstep = false;
             // Controlled critters don't make their own plans

src/monexamine.cpp

@@ -668,39 +668,24 @@ void monexamine::tie_or_untie( monster &z )
 
 void monexamine::milk_source( monster &source_mon )
 {
-    const auto milked_item = source_mon.type->starting_ammo.find( "milk_raw" );
-    if( milked_item == source_mon.type->starting_ammo.end() ) {
+    const auto milked_item = source_mon.ammo.find( "milk_raw" );
+    if( milked_item == source_mon.ammo.end() ) {
         debugmsg( "%s is milkable but has no milk in its starting ammo!",
                   source_mon.get_name() );
         return;
     }
-    const int milk_per_day = milked_item->second;
-    const time_duration milking_freq = 1_days / milk_per_day;
-
-    int remaining_milk = milk_per_day;
-    if( source_mon.has_effect( effect_milked ) ) {
-        remaining_milk -= source_mon.get_effect_dur( effect_milked ) / milking_freq;
-    }
-
-    if( remaining_milk > 0 ) {
+    if( milked_item->second > 0 ) {
+        const int moves = to_moves<int>( time_duration::from_minutes( milked_item->second / 2 ) );
+        g->u.assign_activity( ACT_MILK, moves, -1 );
+        g->u.activity.coords.push_back( g->m.getabs( source_mon.pos() ) );
         // pin the cow in place if it isn't already
         bool temp_tie = !source_mon.has_effect( effect_tied );
         if( temp_tie ) {
             source_mon.add_effect( effect_tied, 1_turns, num_bp, true );
+            g->u.activity.str_values.push_back( "temp_tie" );
         }
-
-        item milk( milked_item->first, calendar::turn, remaining_milk );
-        milk.set_item_temperature( 311.75 );
-        if( liquid_handler::handle_liquid( milk, nullptr, 1, nullptr, nullptr, -1, &source_mon ) ) {
-            add_msg( _( "You milk the %s." ), source_mon.get_name() );
-            int transferred_milk = remaining_milk - milk.charges;
-            source_mon.add_effect( effect_milked, milking_freq * transferred_milk );
-            g->u.mod_moves( -to_moves<int>( transferred_milk * 1_minutes / 5 ) );
-        }
-        if( temp_tie ) {
-            source_mon.remove_effect( effect_tied );
-        }
+        add_msg( _( "You milk the %s." ), source_mon.get_name() );
     } else {
-        add_msg( _( "The %s's udders run dry." ), source_mon.get_name() );
+        add_msg( _( "The %s has no more milk." ), source_mon.get_name() );
     }
 }

src/monster.cpp

@@ -105,6 +105,7 @@ monster::monster()
     upgrade_time = -1;
     last_updated = 0;
     biosig_timer = -1;
+    udder_timer = calendar::turn;
     horde_attraction = MHA_NULL;
 }
 
@@ -359,6 +360,28 @@ void monster::try_reproduce()
     }
 }
 
+void monster::refill_udders()
+{
+    if( !has_flag( MF_MILKABLE ) ) {
+        return;
+    }
+    const auto milked_item = type->starting_ammo.find( "milk_raw" );
+    auto current_milk = ammo.find( "milk_raw" );
+    if( milked_item == type->starting_ammo.end() || current_milk == ammo.end() ) {
+        debugmsg( "%s is milkable but has no milk in its starting ammo!", get_name() );
+        return;
+    }
+    if( current_milk->second == milked_item->second ) {
+        // already full up
+        return;
+    }
+    if( calendar::turn - udder_timer > 1_days ) {
+        // no point granularizing this really, you milk once a day.
+        current_milk->second = milked_item->second;
+        udder_timer = calendar::turn;
+    }
+}
+
 void monster::try_biosignature()
 {
     if( !biosignatures ) {
@@ -2793,6 +2816,7 @@ void monster::on_load()
     try_upgrade( false );
     try_reproduce();
     try_biosignature();
+    refill_udders();
 
     const time_duration dt = calendar::turn - last_updated;
     last_updated = calendar::turn;

src/monster.h

@@ -107,6 +107,7 @@ class monster : public Creature
         void try_upgrade( bool pin_time );
         void try_reproduce();
         void try_biosignature();
+        void refill_udders();
         void spawn( const tripoint &p );
         m_size get_size() const override;
         units::mass get_weight() const override;
@@ -548,6 +549,7 @@ class monster : public Creature
         cata::optional<time_point> baby_timer;
         bool biosignatures;
         cata::optional<time_point> biosig_timer;
+        time_point udder_timer;
         monster_horde_attraction horde_attraction;
         /** Found path. Note: Not used by monsters that don't pathfind! **/
         std::vector<tripoint> path;

src/savegame_json.cpp

@@ -1926,6 +1926,8 @@ void monster::load( const JsonObject &data )
     biosignatures = data.get_bool( "biosignatures", type->biosignatures );
     biosig_timer = data.get_int( "biosig_timer", -1 );
 
+    data.read( "udder_timer", udder_timer );
+
     horde_attraction = static_cast<monster_horde_attraction>( data.get_int( "horde_attraction", 0 ) );
 
     data.read( "inv", inv );
@@ -2008,6 +2010,7 @@ void monster::store( JsonOut &json ) const
     json.member( "baby_timer", baby_timer );
     json.member( "biosignatures", biosignatures );
     json.member( "biosig_timer", biosig_timer );
+    json.member( "udder_timer", udder_timer );
 
     json.member( "summon_time_limit", summon_time_limit );