From 3b3d1cf55329ded340a5a44317225d48e9107912 Mon Sep 17 00:00:00 2001
From: Johann Petersell <70780063+johannptl@users.noreply.github.com>
Date: Fri, 8 Sep 2023 21:39:56 +0200
Subject: [PATCH] Added a pause feature (#5)

Pressing 'p' will pause game execution and display a "Paused" message. Pressing 'p' again will unpause.

Implemented via new game state.
---
 Cargo.lock  |  2 +-
 Cargo.toml  |  2 +-
 README.md   |  1 +
 src/game.rs | 16 +++++++++++++++-
 src/main.rs |  2 +-
 5 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index eb40a18..aa4cd5b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -280,7 +280,7 @@ dependencies = [
 
 [[package]]
 name = "tetris-cli"
-version = "22.67.2"
+version = "23.96.1"
 dependencies = [
  "big_num",
  "confy",
diff --git a/Cargo.toml b/Cargo.toml
index 08f97f7..c2d3745 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tetris-cli"
-version = "22.67.2"
+version = "23.96.1"
 edition = "2021"
 description = "A tetris clone for your terminal."
 license = "GPL-3.0"
diff --git a/README.md b/README.md
index 7228365..e894989 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ and on NetBSD [tetris-cli](https://pkgsrc.se/games/tetris-cli) from the official
 + q -> Rotate left
 + e -> Rotate right
 + s -> Instant drop
++ p -> Pause
 + Backspace -> Quit
 
 ## Build dependencies
diff --git a/src/game.rs b/src/game.rs
index f442319..3904b11 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -49,6 +49,11 @@ const BORDER: [&'static str; DISP_HEIGHT as usize] = [
     "║                    ║",
     "╚════════════════════╝"
 ];
+const PAUSE: [&'static str; 3 as usize] = [
+    "╔════════╗",
+    "║ PAUSED ║",
+    "╚════════╝"
+];
 const BORDER_COLOR: &dyn Color = &White;
 const SCORE_COLOR: &dyn Color = &White;
 const SHAPE_DRAW_OFFSET: i16 = 5;
@@ -77,7 +82,8 @@ pub struct GameState {
 enum UpdateEndState {
     Quit,
     Lost,
-    Continue
+    Continue,
+    Pause
 }
 
 impl GameState {
@@ -130,6 +136,13 @@ impl GameState {
                     return 0;
                 }, UpdateEndState::Lost => {
                     break;
+                },
+                UpdateEndState::Pause => {
+                    // Keep the game paused until 'p' is pressed again
+                    while inp.get_key() != b'p' {
+                        cnv.draw_strs(&PAUSE.to_vec(), (7, 13), BORDER_COLOR, &Reset); // Drawing the pause text
+                        sleep(Duration::from_millis(interval_ms));
+                    }
                 }
             }
             self.draw(cnv, hs_disp);
@@ -142,6 +155,7 @@ impl GameState {
         let key = inp.get_key();
         match key {
             127 => return UpdateEndState::Quit, // Backspace -> back to menu
+            b'p' => return UpdateEndState::Pause, // p -> Pause
             b'a' => {
                 if self.can_move_curr_shape(Dir::Left) {
                     self.curr_shape.pos.0 -= 1.0;
diff --git a/src/main.rs b/src/main.rs
index ca67e1e..a45dd3d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -40,10 +40,10 @@ const MENU: [&'static str; DISP_HEIGHT as usize] = [
     "║ - a/d - left/right ║",
     "║   - q/e - rotate   ║",
     "║ - s -> drop piece  ║",
+    "║    - p -> pause    ║",
     "║   - back -> quit   ║",
     "║                    ║",
     "║                    ║",
-    "║                    ║",
     "║  Enter to begin... ║",
     "║                    ║",
     "║                    ║",