forked from bot/tmp2
163 lines
3.8 KiB
Rust
163 lines
3.8 KiB
Rust
#[derive(Debug, Copy, Clone, PartialEq)]
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pub enum Levels {
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One = 500,
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Two = 1000,
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Three = 2000,
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Four = 4000,
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}
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impl Default for Levels {
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fn default() -> Self {
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Levels::One
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}
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}
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impl Levels {
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pub fn relax(&mut self) -> u32 {
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self.rev().next();
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*self as u32
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}
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///! Difficulty is calculated as
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///! ```rust
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///! let difficulty = u128::max_value() - u128::max_value() / difficulty_factor;
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///! ```
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///! the higher the `difficulty_factor`, the higher the difficulty.
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pub fn get_difficulty(&self) -> u32 {
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match self {
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Levels::Three => 100_000,
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Levels::Four => 1_000_000,
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_ => *self as u32,
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}
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}
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pub fn threshold(&self) -> usize {
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*self as usize
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}
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pub fn focus(&mut self) -> u32 {
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self.next();
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*self as u32
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}
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}
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impl DoubleEndedIterator for Levels {
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fn next_back(&mut self) -> Option<Self::Item> {
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match self {
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Levels::One => {
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*self = Levels::One;
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}
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Levels::Two => {
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*self = Levels::One;
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}
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Levels::Three => {
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*self = Levels::Two;
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}
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Levels::Four => {
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*self = Levels::Three;
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}
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};
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Some(())
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}
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}
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impl Iterator for Levels {
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type Item = ();
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fn next(&mut self) -> Option<()> {
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match self {
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Levels::One => {
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*self = Levels::Two;
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}
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Levels::Two => {
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*self = Levels::Three;
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}
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Levels::Three => {
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*self = Levels::Four;
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}
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Levels::Four => {
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*self = Levels::Four;
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}
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};
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Some(())
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn levels_enum_works() {
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let mut level = Levels::default();
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assert_eq!(level, Levels::One);
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level.next();
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assert_eq!(level, Levels::Two);
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level.next();
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assert_eq!(level, Levels::Three);
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level.next();
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assert_eq!(level, Levels::Four);
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level.next();
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assert_eq!(level, Levels::Four);
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}
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#[test]
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fn focus_works() {
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let mut level = Levels::default();
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assert_eq!(level, Levels::One);
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assert_eq!(level.focus(), Levels::Two as u32);
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assert_eq!(level.focus(), Levels::Three as u32);
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assert_eq!(level.focus(), Levels::Four as u32);
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assert_eq!(level.focus(), Levels::Four as u32);
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}
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#[test]
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fn relax_works() {
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let mut level = Levels::default();
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assert_eq!(level, Levels::One);
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assert_eq!(level.focus(), Levels::Two as u32);
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assert_eq!(level.focus(), Levels::Three as u32);
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assert_eq!(level.focus(), Levels::Four as u32);
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assert_eq!(level.relax(), Levels::Three as u32);
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assert_eq!(level.relax(), Levels::Two as u32);
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assert_eq!(level.relax(), Levels::One as u32);
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assert_eq!(level.relax(), Levels::One as u32);
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}
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#[test]
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fn threshold_works() {
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let mut level = Levels::default();
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assert_eq!(level.threshold(), Levels::One as usize);
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level.next();
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assert_eq!(level.threshold(), Levels::Two as usize);
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level.next();
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assert_eq!(level.threshold(), Levels::Three as usize);
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}
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#[test]
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fn difficulty_works() {
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let mut level = Levels::default();
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assert_eq!(level.get_difficulty(), Levels::One as u32);
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level.next();
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assert_eq!(level.get_difficulty(), Levels::Two as u32);
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level.next();
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assert_eq!(level.get_difficulty(), 100_000);
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level.next();
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assert_eq!(level.get_difficulty(), 1_000_000);
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}
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}
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