41 lines
999 B
Rust
41 lines
999 B
Rust
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use crate::models::Drink;
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use std::collections::HashMap;
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pub struct DrinkReport {
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pub summary: HashMap<u32, u32>,
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}
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impl DrinkReport {
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pub fn into_sorted(self) -> impl Iterator<Item = (u32, u32)> {
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let mut array: Vec<(u32, u32)> = self.summary.into_iter().collect();
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array.sort_by(|(a, _), (b, _)| a.cmp(b));
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array.into_iter()
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}
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}
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pub trait GenerateDrinkReport {
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fn generate_report(&self) -> DrinkReport;
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}
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impl GenerateDrinkReport for Vec<Drink> {
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fn generate_report(&self) -> DrinkReport {
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let mut summary: HashMap<u32, u32> = HashMap::new();
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// init with all default drink prices
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for price in [2u32, 3u32, 5u32, 8u32, 15u32].into_iter() {
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summary.insert(price, 0);
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}
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for drink in self {
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summary
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.entry(drink.price)
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.and_modify(|v| *v += drink.quantity)
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.or_insert(drink.quantity);
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}
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DrinkReport { summary }
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}
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}
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