1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
use super::traits::{Game, GamePhase, GameState};
use crate::slots::{paytable_lines, LINE_NAMES, REELS, ROWS};
/// Height of the game board. It must never depend on the spin result.
pub const SLOT_BOARD_LINES: usize = 10;
pub struct SlotsGame;
impl SlotsGame {
pub fn new() -> Self {
Self
}
fn cell(chars: &[char], row: usize, col: usize, winning: &[usize]) -> String {
let symbol = if chars.len() == REELS * ROWS {
chars.get(col * ROWS + row).copied().unwrap_or('?')
} else if chars.len() == 3 && row == 0 {
// Legacy 3-symbol server: degrade to the first row.
chars.get(col).copied().unwrap_or('?')
} else {
'?'
};
if winning.contains(&(col * ROWS + row)) {
format!("{{ {} }}", symbol)
} else {
format!("[ {} ]", symbol)
}
}
fn highlighted_cells(state: &GameState) -> Vec<usize> {
state
.data
.get("win_cells")
.map(|raw| {
raw.split(',')
.filter_map(|value| value.trim().parse::<usize>().ok())
.collect()
})
.unwrap_or_default()
}
fn render_grid(&self, reels: &str, winning: &[usize]) -> [String; ROWS] {
let chars: Vec<char> = reels.chars().collect();
std::array::from_fn(|row| {
(0..REELS)
.map(|col| Self::cell(&chars, row, col, winning))
.collect::<Vec<_>>()
.join(" ")
})
}
fn render_status(&self, state: &GameState) -> String {
if let Some(error) = state.data.get("error") {
return format!("ERROR: {error}");
}
if state.phase == GamePhase::Playing {
return "Spinning...".to_string();
}
if state.phase == GamePhase::Finished {
let winnings = state
.data
.get("winnings")
.map(String::as_str)
.unwrap_or("0");
if winnings != "0" {
return match state.data.get("win_type").map(String::as_str) {
Some("mega") => format!("MEGA WIN! {winnings} PLN"),
Some("big") => format!("BIG WIN! {winnings} PLN"),
_ => format!("Won {winnings} PLN"),
};
}
return "No win.".to_string();
}
"Press [SPACE] to spin!".to_string()
}
fn render_win_lines(&self, state: &GameState) -> String {
if state.phase != GamePhase::Finished {
return String::new();
}
match state.data.get("win_lines").map(String::as_str) {
Some(lines) if !lines.is_empty() && lines != "-" => {
let named: Vec<String> = lines
.split(',')
.filter_map(|raw| raw.trim().parse::<usize>().ok())
.map(|line| {
let name = line
.checked_sub(1)
.and_then(|index| LINE_NAMES.get(index))
.copied();
match name {
Some(name) => format!("{line} ({name})"),
None => line.to_string(),
}
})
.collect();
format!("Winning lines: {}", named.join(", "))
}
_ => String::new(),
}
}
}
impl Game for SlotsGame {
fn get_name(&self) -> &'static str {
"Slots"
}
fn render(&self, state: &GameState) -> String {
let reels = state.data.get("reels").cloned().unwrap_or_default();
let balance = state
.data
.get("balance")
.map(String::as_str)
.unwrap_or("?");
let winning = Self::highlighted_cells(state);
let grid = self.render_grid(&reels, &winning);
let paytable = paytable_lines();
format!(
"=== SLOTS ===\r\nBet: {} PLN Balance: {} PLN\r\n{}\r\n{}\r\n{}\r\n{}\r\n{}\r\n{}\r\n{}\r\n[+/-] Bet [SPACE] Spin [Q] Quit",
state.bet_amount,
balance,
grid[0],
grid[1],
grid[2],
paytable[0],
paytable[1],
self.render_status(state),
self.render_win_lines(state)
)
}
fn render_lines(&self, _state: &GameState) -> usize {
SLOT_BOARD_LINES
}
fn get_help(&self) -> String {
"SLOTS GAME\n\
=========\n\
5 reels x 3 rows, 5 paylines.\n\
A win needs 3, 4 or 5 matching symbols from reel 1 on a payline.\n\
\n\
Payout = total bet x symbol x shape\n\
Symbols: C=1 L=2 O=3 G=4 D=6 S=10\n\
Shapes: 3 of a kind=1, 4 of a kind=3, 5 of a kind=14\n\
\n\
Lines: 1 top, 2 middle, 3 bottom, 4 V, 5 inverted V\n\
Multiple winning lines are added together.\n\
\n\
Symbols: C=Cherry, L=Lemon, O=Orange, G=Grapes, D=Diamond, S=Seven\n\
\n\
Controls:\n\
SPACE - Spin the reels\n\
+/- - Adjust total bet\n\
Q - Exit the game"
.to_string()
}
}
|
