ActionWithDirection runstate

- setting this runstate with a function as arg will give a direction prompt, and then call the function with the selected direction as the argument. i.e. for opening a door or throwing an item in a specific direction

src/gui.rs

@@ -1,6 +1,6 @@
 use super::{
-    gamelog, rex_assets::RexAssets, CombatStats, Equipped, Hidden, HungerClock, HungerState, InBackpack, Map, Name,
-    Player, Point, Position, RunState, State, Viewshed,
+    gamelog, player::try_door, rex_assets::RexAssets, CombatStats, Equipped, Hidden, HungerClock, HungerState,
+    InBackpack, Map, Name, Player, Point, Position, RunState, State, Viewshed,
 };
 use rltk::{Rltk, VirtualKeyCode, RGB};
 use specs::prelude::*;
@@ -58,6 +58,30 @@ pub fn draw_ui(ecs: &World, ctx: &mut Rltk) {
     draw_tooltips(ecs, ctx);
 }
 
+pub fn get_input_direction(
+    ecs: &mut World,
+    ctx: &mut Rltk,
+    function: fn(i: i32, j: i32, ecs: &mut World) -> RunState,
+) -> RunState {
+    ctx.print_color(1, 1, RGB::named(rltk::WHITE), RGB::named(rltk::BLACK), "In what direction? [0-9]/[YUHJKLBN]");
+    match ctx.key {
+        None => return RunState::ActionWithDirection { function },
+        Some(key) => match key {
+            // Cardinals
+            VirtualKeyCode::Left | VirtualKeyCode::Numpad4 | VirtualKeyCode::H => return function(-1, 0, ecs),
+            VirtualKeyCode::Right | VirtualKeyCode::Numpad6 | VirtualKeyCode::L => return function(1, 0, ecs),
+            VirtualKeyCode::Up | VirtualKeyCode::Numpad8 | VirtualKeyCode::K => return function(0, -1, ecs),
+            VirtualKeyCode::Down | VirtualKeyCode::Numpad2 | VirtualKeyCode::J => return function(0, 1, ecs),
+            // Diagonals
+            VirtualKeyCode::Numpad9 | VirtualKeyCode::U => return function(1, -1, ecs),
+            VirtualKeyCode::Numpad7 | VirtualKeyCode::Y => return function(-1, -1, ecs),
+            VirtualKeyCode::Numpad3 | VirtualKeyCode::N => return function(1, 1, ecs),
+            VirtualKeyCode::Numpad1 | VirtualKeyCode::B => return function(-1, 1, ecs),
+            _ => return RunState::ActionWithDirection { function },
+        },
+    }
+}
+
 fn draw_tooltips(ecs: &World, ctx: &mut Rltk) {
     let map = ecs.fetch::<Map>();
     let names = ecs.read_storage::<Name>();

src/main.rs

@@ -56,6 +56,7 @@ pub enum RunState {
     ShowDropItem,
     ShowRemoveItem,
     ShowTargeting { range: i32, item: Entity, aoe: i32 },
+    ActionWithDirection { function: fn(i: i32, j: i32, ecs: &mut World) -> RunState },
     MainMenu { menu_selection: gui::MainMenuSelection },
     SaveGame,
     GameOver,
@@ -398,6 +399,9 @@ impl GameState for State {
                     }
                 }
             }
+            RunState::ActionWithDirection { function } => {
+                new_runstate = gui::get_input_direction(&mut self.ecs, ctx, try_door);
+            }
             RunState::MainMenu { .. } => {
                 let result = gui::main_menu(self, ctx);
                 match result {

src/player.rs

@@ -7,6 +7,65 @@ use rltk::{Point, RandomNumberGenerator, Rltk, VirtualKeyCode};
 use specs::prelude::*;
 use std::cmp::{max, min};
 
+pub fn try_door(i: i32, j: i32, ecs: &mut World) -> RunState {
+    let mut positions = ecs.write_storage::<Position>();
+    let mut players = ecs.write_storage::<Player>();
+    let mut viewsheds = ecs.write_storage::<Viewshed>();
+    let map = ecs.fetch::<Map>();
+
+    let entities = ecs.entities();
+    let mut doors = ecs.write_storage::<Door>();
+    let mut blocks_visibility = ecs.write_storage::<BlocksVisibility>();
+    let mut blocks_movement = ecs.write_storage::<BlocksTile>();
+    let mut renderables = ecs.write_storage::<Renderable>();
+    let names = ecs.read_storage::<Name>();
+
+    for (_entity, _player, pos, viewshed) in (&entities, &mut players, &mut positions, &mut viewsheds).join() {
+        let delta_x = i;
+        let delta_y = j;
+
+        if !(pos.x + delta_x < 1
+            || pos.x + delta_x > map.width - 1
+            || pos.y + delta_y < 1
+            || pos.y + delta_y > map.height - 1)
+        {
+            let destination_idx = map.xy_idx(pos.x + delta_x, pos.y + delta_y);
+
+            for potential_target in map.tile_content[destination_idx].iter() {
+                let door = doors.get_mut(*potential_target);
+                if let Some(door) = door {
+                    if door.open == true {
+                        if map.tile_content[destination_idx].len() > 1 {
+                            if let Some(name) = names.get(*potential_target) {
+                                gamelog::Logger::new().append("The").item_name(&name.name).append("is blocked.").log();
+                            }
+                        } else {
+                            door.open = false;
+                            blocks_visibility
+                                .insert(*potential_target, BlocksVisibility {})
+                                .expect("Unable to insert BlocksVisibility.");
+                            blocks_movement
+                                .insert(*potential_target, BlocksTile {})
+                                .expect("Unable to insert BlocksTile.");
+                            let render_data = renderables.get_mut(*potential_target).unwrap();
+                            if let Some(name) = names.get(*potential_target) {
+                                gamelog::Logger::new().append("You close the").item_name_n(&name.name).period().log();
+                            }
+                            render_data.glyph = rltk::to_cp437('+'); // Nethack open door, maybe just use '/' instead.
+                            viewshed.dirty = true;
+                            return RunState::PlayerTurn;
+                        }
+                    } else {
+                        gamelog::Logger::new().append("It's already closed.");
+                    }
+                }
+            }
+        }
+    }
+    gamelog::Logger::new().append("You see no door there.");
+    return RunState::AwaitingInput;
+}
+
 pub fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) -> bool {
     let mut positions = ecs.write_storage::<Position>();
     let mut players = ecs.write_storage::<Player>();
@@ -47,7 +106,7 @@ pub fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) -> bool {
                     blocks_visibility.remove(*potential_target);
                     blocks_movement.remove(*potential_target);
                     let render_data = renderables.get_mut(*potential_target).unwrap();
-                    if let Some(name) = names.get(entity) {
+                    if let Some(name) = names.get(*potential_target) {
                         gamelog::Logger::new().append("You open the").item_name_n(&name.name).period().log();
                     }
                     render_data.glyph = rltk::to_cp437('▓'); // Nethack open door, maybe just use '/' instead.
@@ -179,6 +238,7 @@ pub fn player_input(gs: &mut State, ctx: &mut Rltk) -> RunState {
             }
 
             // Items
+            VirtualKeyCode::C => return RunState::ActionWithDirection { function: try_door },
             VirtualKeyCode::G => {
                 result = get_item(&mut gs.ecs);
             }