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//! Guild name retrieval and caching functions.
use super::paths;
use std::collections::HashMap;
use std::fs::File;
use std::sync::RwLock;
use anyhow::Result;
use log::{error, warn};
use once_cell::sync::Lazy;
use serde::{Deserialize, Serialize};
static CACHE: Lazy<RwLock<HashMap<String, Guild>>> = Lazy::new(|| RwLock::new(HashMap::new()));
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct Guild {
tag: String,
name: String,
}
impl Guild {
pub fn tag(&self) -> &str {
&self.tag
}
pub fn name(&self) -> &str {
&self.name
}
}
/// Looks up the given guild.
///
/// This checks the cache first, and if nothing was found, it will hit the API.
pub fn lookup(api_id: &str) -> Option<Guild> {
{
let cache = CACHE.read().unwrap();
if let Some(guild) = cache.get(api_id) {
return Some(guild.clone());
}
}
let mut cache = CACHE.write().unwrap();
let url = format!("https://api.guildwars2.com/v2/guild/{}", api_id);
let guild: Guild = ureq::get(&url)
.call()
.ok()?
.into_json()
.expect("Invalid JSON in API response");
cache.insert(api_id.into(), guild.clone());
Some(guild)
}
/// Loads the cache from the file system.
pub fn prepare_cache() {
let path = paths::cache_path();
if let Some(path) = path {
if !path.is_file() {
return;
}
let file = File::open(path).expect("Unable to read cache file");
let cache = serde_json::from_reader(file).expect("Cache file has invalid format");
let mut target = CACHE.write().unwrap();
*target = cache;
} else {
warn!("Could not determine the cache path, the persistent guild cache is disabled");
}
}
/// Saves the cache to the file system
pub fn save_cache() {
let path = paths::cache_path();
// We already warned about that earlier
if let Some(path) = path {
let result: Result<()> = try {
let file = File::create(path)?;
serde_json::to_writer(file, &*CACHE.read().unwrap())?;
};
if let Err(e) = result {
error!("Error saving the cache: {}", e);
}
}
}
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