MeiliSearch/meilisearch-schema/src/fields_map.rs
2020-02-27 14:33:57 +01:00

83 lines
2.5 KiB
Rust

use std::collections::HashMap;
use std::collections::hash_map::Iter;
use serde::{Deserialize, Serialize};
use crate::{SResult, FieldId};
#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct FieldsMap {
name_map: HashMap<String, FieldId>,
id_map: HashMap<FieldId, String>,
next_id: FieldId
}
impl FieldsMap {
pub fn len(&self) -> usize {
self.name_map.len()
}
pub fn is_empty(&self) -> bool {
self.name_map.is_empty()
}
pub fn insert(&mut self, name: &str) -> SResult<FieldId> {
if let Some(id) = self.name_map.get(name) {
return Ok(*id)
}
let id = self.next_id;
self.next_id = self.next_id.next()?;
self.name_map.insert(name.to_string(), id);
self.id_map.insert(id, name.to_string());
Ok(id)
}
pub fn remove(&mut self, name: &str) {
if let Some(id) = self.name_map.get(name) {
self.id_map.remove(&id);
}
self.name_map.remove(name);
}
pub fn id(&self, name: &str) -> Option<FieldId> {
self.name_map.get(name).copied()
}
pub fn name<I: Into<FieldId>>(&self, id: I) -> Option<&str> {
self.id_map.get(&id.into()).map(|s| s.as_str())
}
pub fn iter(&self) -> Iter<'_, String, FieldId> {
self.name_map.iter()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn fields_map() {
let mut fields_map = FieldsMap::default();
assert_eq!(fields_map.insert("id").unwrap(), 0.into());
assert_eq!(fields_map.insert("title").unwrap(), 1.into());
assert_eq!(fields_map.insert("descritpion").unwrap(), 2.into());
assert_eq!(fields_map.insert("id").unwrap(), 0.into());
assert_eq!(fields_map.insert("title").unwrap(), 1.into());
assert_eq!(fields_map.insert("descritpion").unwrap(), 2.into());
assert_eq!(fields_map.id("id"), Some(0.into()));
assert_eq!(fields_map.id("title"), Some(1.into()));
assert_eq!(fields_map.id("descritpion"), Some(2.into()));
assert_eq!(fields_map.id("date"), None);
assert_eq!(fields_map.len(), 3);
assert_eq!(fields_map.name(0), Some("id"));
assert_eq!(fields_map.name(1), Some("title"));
assert_eq!(fields_map.name(2), Some("descritpion"));
assert_eq!(fields_map.name(4), None);
fields_map.remove("title");
assert_eq!(fields_map.id("title"), None);
assert_eq!(fields_map.insert("title").unwrap(), 3.into());
assert_eq!(fields_map.len(), 3);
}
}