32 lines
1,019 B
JavaScript
32 lines
1,019 B
JavaScript
// A store where you can divide data into "realms" that are backed with an LRU cache.
|
|
// Each realm has self-contained data that you can set with setForRealm() and compute
|
|
// with computeForRealm(). The maxSize determines how many realms to keep in the LRU cache.
|
|
import { Store } from 'svelte/store.js'
|
|
import QuickLRU from 'quick-lru'
|
|
|
|
export class RealmStore extends Store {
|
|
constructor(init, maxSize) {
|
|
super(init)
|
|
this.set({realms: new QuickLRU({maxSize: maxSize})})
|
|
}
|
|
|
|
setCurrentRealm(realm) {
|
|
this.set({currentRealm: realm})
|
|
}
|
|
|
|
setForRealm(obj) {
|
|
let realmName = this.get('currentRealm')
|
|
let realms = this.get('realms')
|
|
realms.set(realmName, Object.assign(realms.get(realmName) || {}, obj))
|
|
this.set({realms: realms})
|
|
}
|
|
|
|
computeForRealm(key, defaultValue) {
|
|
this.compute(key,
|
|
['realms', 'currentRealm'],
|
|
(realms, currentRealm) => {
|
|
let realmData = realms.get(currentRealm)
|
|
return (realmData && realmData[key]) || defaultValue
|
|
})
|
|
}
|
|
} |