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'use strict';
const DataManager = require('./DataManager');
const { MakeCacheOverrideSymbol } = require('../util/Symbols');
/**
* Manages the API methods of a data model with a mutable cache of instances.
* @extends {DataManager}
* @abstract
*/
class CachedManager extends DataManager {
constructor(client, holds, iterable) {
super(client, holds);
/**
* The private cache of items for this manager.
* @type {Collection}
* @private
* @readonly
* @name CachedManager#_cache
*/
Object.defineProperty(this, '_cache', {
value: this.client.options.makeCache(
this.constructor[MakeCacheOverrideSymbol] ?? this.constructor,
this.holds,
this.constructor,
),
});
if (iterable) {
for (const item of iterable) {
this._add(item);
}
}
}
/**
* The cache of items for this manager.
* @type {Collection}
* @abstract
*/
get cache() {
return this._cache;
}
_add(data, cache = true, { id, extras = [] } = {}) {
const existing = this.cache.get(id ?? data.id);
if (existing) {
if (cache) {
existing._patch(data);
return existing;
}
const clone = existing._clone();
clone._patch(data);
return clone;
}
const entry = this.holds ? new this.holds(this.client, data, ...extras) : data;
if (cache) this.cache.set(id ?? entry.id, entry);
return entry;
}
}
module.exports = CachedManager;
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