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39 lines
960 B
39 lines
960 B
pub trait Messenger {
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fn send(&self, msg: &str);
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}
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pub struct LimitTracker<'a, T: Messenger> {
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messenger: &'a T,
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value: usize,
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max: usize,
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}
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impl<'a, T> LimitTracker<'a, T>
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where
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T: Messenger,
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{
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pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
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LimitTracker {
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messenger,
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value: 0,
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max,
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}
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}
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pub fn set_value(&mut self, value: usize) {
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self.value = value;
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let percentage_of_max = self.value as f64 / self.max as f64;
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if percentage_of_max >= 1.0 {
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self.messenger.send("Error: You are over your quota!");
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} else if percentage_of_max >= 0.9 {
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self.messenger
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.send("Urgent warning: You've used up over 90% of your quota!");
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} else if percentage_of_max >= 0.75 {
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self.messenger
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.send("Warning: You've used up over 75% of your quota!");
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}
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}
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}
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