Allow examining furniture to convert to appliances

It's a little silly to deconstruct a piece of furniture, then put it
back up in the same place to turn it into an appliance - let's just
directly turn them into appliances with an examine.

Move some functions from construction.cpp to veh_appliance.cpp for reuse
in other things that place appliances (such as the examine action here).

data/json/furniture_and_terrain/furniture-appliances.json

@@ -183,6 +183,7 @@
     "flags": [ "CONTAINER", "PLACE_ITEM", "BLOCKSDOOR", "MINEABLE", "NO_SELF_CONNECT", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "fridge", "count": 1 } ] },
     "max_volume": "200 L",
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "fridge" },
     "bash": {
       "str_min": 18,
       "str_max": 50,
@@ -259,6 +260,7 @@
     "move_cost_mod": -1,
     "coverage": 60,
     "required_str": 10,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "freezer" },
     "flags": [ "CONTAINER", "PLACE_ITEM", "BLOCKSDOOR", "MINEABLE", "NO_SELF_CONNECT", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "freezer", "count": 1 } ] },
     "max_volume": "450 L",
@@ -363,6 +365,8 @@
     "move_cost_mod": 2,
     "coverage": 60,
     "required_str": 10,
+    "//": "TODO: This should be able to have this action, but it can't because it has the fireplace one",
+    "//examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "oven" },
     "flags": [ "PLACE_ITEM", "TRANSPARENT", "EASY_DECONSTRUCT", "FIRE_CONTAINER", "CONTAINER", "BLOCKSDOOR", "MOUNTABLE" ],
     "deconstruct": { "items": [ { "item": "oven", "count": 1 } ] },
     "examine_action": "fireplace",
@@ -586,6 +590,7 @@
     "color": "yellow",
     "move_cost_mod": 2,
     "required_str": -1,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "solar_panel" },
     "flags": [ "TRANSPARENT" ],
     "deconstruct": { "items": [ { "item": "solar_panel", "count": 1 } ] },
     "bash": {

data/json/furniture_and_terrain/furniture-decorative.json

@@ -212,6 +212,7 @@
     "color": "light_gray",
     "move_cost_mod": 2,
     "required_str": 1,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "standing_lamp" },
     "flags": [ "TRANSPARENT", "BLOCKSDOOR", "PLACE_ITEM", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "standing_lamp", "count": 1 } ] },
     "bash": {

data/json/furniture_and_terrain/furniture-recreation.json

@@ -150,6 +150,7 @@
     "move_cost_mod": -1,
     "coverage": 75,
     "required_str": 12,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "arcade_machine" },
     "flags": [ "BLOCKSDOOR", "TRANSPARENT" ],
     "deconstruct": {
       "items": [

data/json/furniture_and_terrain/furniture-tools.json

@@ -617,6 +617,7 @@
     "move_cost_mod": -1,
     "coverage": 40,
     "required_str": 10,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "drill_press" },
     "flags": [ "BLOCKSDOOR", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "drill_press", "count": 1 } ] },
     "bash": {
@@ -670,6 +671,7 @@
     "move_cost_mod": 8,
     "coverage": 40,
     "required_str": 10,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "tablesaw" },
     "flags": [ "BLOCKSDOOR", "TRANSPARENT", "MOUNTABLE", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "tablesaw", "count": 1 } ] },
     "bash": {
@@ -696,6 +698,7 @@
     "move_cost_mod": -1,
     "coverage": 40,
     "required_str": 10,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "mitresaw" },
     "flags": [ "BLOCKSDOOR", "TRANSPARENT", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "mitresaw", "count": 1 } ] },
     "bash": {
@@ -722,6 +725,7 @@
     "move_cost_mod": -1,
     "coverage": 40,
     "required_str": 10,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "bandsaw" },
     "flags": [ "BLOCKSDOOR", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "bandsaw", "count": 1 } ] },
     "bash": {
@@ -748,6 +752,7 @@
     "move_cost_mod": 8,
     "coverage": 35,
     "required_str": 14,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "router" },
     "flags": [ "BLOCKSDOOR", "TRANSPARENT", "MOUNTABLE", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "router", "count": 1 } ] },
     "bash": {
@@ -774,6 +779,7 @@
     "move_cost_mod": -1,
     "coverage": 40,
     "required_str": 12,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "planer" },
     "flags": [ "BLOCKSDOOR", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "planer", "count": 1 } ] },
     "bash": {
@@ -800,6 +806,7 @@
     "move_cost_mod": 8,
     "coverage": 40,
     "required_str": 14,
+    "examine_action": { "type": "appliance_convert", "furn_set": "f_null", "item": "jointer" },
     "flags": [ "BLOCKSDOOR", "TRANSPARENT", "MOUNTABLE", "EASY_DECONSTRUCT" ],
     "deconstruct": { "items": [ { "item": "jointer", "count": 1 } ] },
     "bash": {

doc/EXAMINE.md

@@ -42,6 +42,33 @@ The examine actors are specified as JSON objects with a `type` corresponding to
 
 ## Examine Actors
 
+### `appliance_convert`
+
+#### `furn_set`
+Optional, defaults to no change.
+String.
+Furniture id that this tile will be set to after placing the appliance.
+
+#### `ter_set`
+Optional, defaults to no change.
+String.
+Terrain id that this tile will be set to after placing the appliance.
+
+#### `item`
+Mandatory.
+String.
+Item id of the base item of this appliance.
+
+#### Example
+```json
+{
+  "type": "appliance_convert",
+  "furn_set": "f_null",
+  "ter_set": "t_floor",
+  "item": "fridge"
+}
+```
+
 ### `cardreader`
 
 #### `flags`

src/construction.cpp

@@ -56,6 +56,7 @@
 #include "ui_manager.h"
 #include "uistate.h"
 #include "units.h"
+#include "veh_appliance.h"
 #include "veh_type.h"
 #include "vehicle.h"
 #include "vpart_position.h"
@@ -94,7 +95,6 @@ static const trap_str_id tr_firewood_source( "tr_firewood_source" );
 static const trap_str_id tr_practice_target( "tr_practice_target" );
 static const trap_str_id tr_unfinished_construction( "tr_unfinished_construction" );
 
-static const vpart_id vpart_ap_standing_lamp( "ap_standing_lamp" );
 static const vpart_id vpart_frame_vertical_2( "frame_vertical_2" );
 
 static const vproto_id vehicle_prototype_none( "none" );
@@ -1337,18 +1337,6 @@ static vpart_id vpart_from_item( const itype_id &item_id )
     return vpart_frame_vertical_2;
 }
 
-static vpart_id vpart_appliance_from_item( const itype_id &item_id )
-{
-    for( const std::pair<const vpart_id, vpart_info> &e : vpart_info::all() ) {
-        const vpart_info &vp = e.second;
-        if( vp.base_item == item_id && vp.has_flag( flag_APPLIANCE ) ) {
-            return vp.get_id();
-        }
-    }
-    debugmsg( "item %s used by construction is not base item of any appliance!", item_id.c_str() );
-    return vpart_ap_standing_lamp;
-}
-
 void construct::done_vehicle( const tripoint &p )
 {
     std::string name = string_input_popup()
@@ -1446,52 +1434,20 @@ void construct::done_wiring( const tripoint &p )
 void construct::done_appliance( const tripoint &p )
 {
     map &here = get_map();
-    vehicle *veh = here.add_vehicle( vehicle_prototype_none, p, 0_degrees, 0, 0 );
-
-    if( !veh ) {
-        debugmsg( "error constructing vehicle" );
-        return;
-    }
-
-    const vpart_id &vpart = vpart_appliance_from_item( get_avatar().lastconsumed );
     partial_con *pc = here.partial_con_at( p );
+    cata::optional<item> base = cata::nullopt;
+    const vpart_id &vpart = vpart_appliance_from_item( get_avatar().lastconsumed );
     if( pc ) {
-        item base;
         for( item &obj : pc->components ) {
             if( obj.typeId() == vpart->base_item ) {
                 base = obj;
             }
         }
-        veh->install_part( point_zero, vpart, std::move( base ) );
     } else {
         debugmsg( "partial construction not found" );
-        veh->install_part( point_zero, vpart );
     }
-    veh->name = vpart->name();
-
     here.partial_con_remove( p );
-
-    veh->add_tag( flag_APPLIANCE );
-
-    // Update the vehicle cache immediately,
-    // or the appliance will be invisible for the first couple of turns.
-    here.add_vehicle_to_cache( veh );
-
-    // Connect to any neighbouring appliances or wires once
-    std::unordered_set<const vehicle *> connected_vehicles;
-    for( const tripoint &trip : here.points_in_radius( p, 1 ) ) {
-        const optional_vpart_position vp = here.veh_at( trip );
-        if( !vp ) {
-            continue;
-        }
-        const vehicle &veh_target = vp->vehicle();
-        if( veh_target.has_tag( flag_APPLIANCE ) || veh_target.has_tag( flag_WIRING ) ) {
-            if( connected_vehicles.find( &veh_target ) == connected_vehicles.end() ) {
-                veh->connect( p, trip );
-                connected_vehicles.insert( &veh_target );
-            }
-        }
-    }
+    place_appliance( p, vpart, base );
 }
 
 void construct::done_deconstruct( const tripoint &p )

src/iexamine_actors.cpp

@@ -11,10 +11,57 @@
 #include "messages.h"
 #include "mtype.h"
 #include "output.h"
+#include "veh_appliance.h"
 
 static const ter_str_id ter_t_door_metal_c( "t_door_metal_c" );
 static const ter_str_id ter_t_door_metal_locked( "t_door_metal_locked" );
 
+void appliance_convert_examine_actor::load( const JsonObject &jo )
+{
+    optional( jo, false, "furn_set", furn_set );
+    optional( jo, false, "ter_set", ter_set );
+    mandatory( jo, false, "item", appliance_item );
+}
+
+void appliance_convert_examine_actor::call( Character &, const tripoint &examp ) const
+{
+    if( !query_yn( _( "Connect %s to grid?" ), item::nname( appliance_item ) ) ) {
+        return;
+    }
+    map &here = get_map();
+    if( furn_set ) {
+        here.furn_set( examp, *furn_set );
+    }
+    if( ter_set ) {
+        here.ter_set( examp, *ter_set );
+    }
+
+    place_appliance( examp, vpart_appliance_from_item( appliance_item ) );
+}
+
+void appliance_convert_examine_actor::finalize() const
+{
+    if( furn_set && !furn_set->is_valid() ) {
+        debugmsg( "Invalid furniture id %s in appliance_convert action", furn_set->str() );
+    }
+    if( ter_set && !ter_set->is_valid() ) {
+        debugmsg( "Invalid terrain id %s in appliance_convert action", ter_set->str() );
+    }
+
+    if( !appliance_item.is_valid() ) {
+        debugmsg( "Invalid appliance item %s in appliance_convert action", appliance_item.str() );
+    } else if( !vpart_appliance_from_item( appliance_item ).is_valid() ) {
+        // This will never actually trigger now, but is here if the semantics of vpart_appliance_from_item change
+        debugmsg( "In appliance_convert action, %s does not correspond to an appliance",
+                  appliance_item.str() );
+    }
+}
+
+std::unique_ptr<iexamine_actor> appliance_convert_examine_actor::clone() const
+{
+    return std::make_unique<appliance_convert_examine_actor>( *this );
+}
+
 void cardreader_examine_actor::consume_card( const std::vector<item_location> &cards ) const
 {
     if( !consume ) {

src/iexamine_actors.h

@@ -9,6 +9,24 @@
 class Character;
 class item_location;
 
+class appliance_convert_examine_actor : public iexamine_actor
+{
+    private:
+        cata::optional<furn_str_id> furn_set = cata::nullopt;
+        cata::optional<ter_str_id> ter_set = cata::nullopt;
+        itype_id appliance_item;
+
+    public:
+        explicit appliance_convert_examine_actor( const std::string &type = "appliance_convert" )
+            : iexamine_actor( type ) {}
+
+        void load( const JsonObject &jo ) override;
+        void call( Character &you, const tripoint &examp ) const override;
+        void finalize() const override;
+
+        std::unique_ptr<iexamine_actor> clone() const override;
+};
+
 class cardreader_examine_actor : public iexamine_actor
 {
     private:
@@ -63,4 +81,5 @@ class eoc_examine_actor : public iexamine_actor
 
         std::unique_ptr<iexamine_actor> clone() const override;
 };
+
 #endif // CATA_SRC_IEXAMINE_ACTORS_H

src/mapdata.cpp

@@ -1309,6 +1309,7 @@ static cata::clone_ptr<iexamine_actor> iexamine_actor_from_jsobj( const JsonObje
 
 void init_mapdata()
 {
+    add_actor( std::make_unique<appliance_convert_examine_actor>() );
     add_actor( std::make_unique<cardreader_examine_actor>() );
     add_actor( std::make_unique<eoc_examine_actor>() );
 }