64 lines
2.1 KiB
Rust
Executable File
64 lines
2.1 KiB
Rust
Executable File
use anyhow_ext::Result;
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use std::sync::Arc;
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use indexmap::IndexMap;
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use crate::Random;
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use crate::StringKey;
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/// A data library is a collection of methods to set up a default library, where values are stored
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/// by both key, while keeping their insertion order.
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pub trait DataLibrary<T: ?Sized> {
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/// Returns the underlying map.
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fn map(&self) -> &IndexMap<StringKey, Arc<T>>;
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/// Returns the underlying map in mutable manner.
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fn get_modify(&mut self) -> &mut IndexMap<StringKey, Arc<T>>;
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/// Adds a new value to the library.
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fn add(&self, key: &StringKey, value: Arc<T>) {
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#[allow(clippy::unwrap_used)] // We know this cant fail.
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let self_mut = unsafe { (self as *const Self as *mut Self).as_mut() }.unwrap();
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self_mut.get_modify().insert(key.clone(), value);
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}
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/// Removes a value from the library.
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fn remove(&self, key: &StringKey) {
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#[allow(clippy::unwrap_used)] // We know this cant fail.
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let self_mut = unsafe { (self as *const Self as *mut Self).as_mut() }.unwrap();
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self_mut.get_modify().remove(key);
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}
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/// Gets a value from the library.
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fn get(&self, key: &StringKey) -> Option<Arc<T>> {
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self.map().get::<StringKey>(key).cloned()
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}
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/// Gets a value from the library.
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fn get_by_hash(&self, key: u32) -> Option<Arc<T>> {
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self.map().get::<u32>(&key).cloned()
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}
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/// Gets a value from the library by the index where it is stored.
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fn get_key_by_index(&self, index: usize) -> Option<StringKey> {
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self.map().get_index(index).map(|a| a.0.clone())
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}
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/// Gets the amount of values in the library.
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fn len(&self) -> usize {
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self.map().len()
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}
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/// Returns whether the library has no values.
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fn is_empty(&self) -> bool {
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self.map().is_empty()
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}
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/// Gets a random value from the library.
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fn random_value(&self, rand: &mut Random) -> Result<&Arc<T>> {
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let i = rand.get_between(0, self.len() as i32);
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match self.map().get_index(i as usize) {
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Some(v) => Ok(v.1),
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None => anyhow::bail!("No value found for index {}", i),
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}
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}
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}
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