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import * as _ from './utils'
export class Storage {
clear(): void {
_.internalsOf<StorageInternals>(this, 'Storage', 'clear').storage.clear()
}
getItem(key: string): string | null {
return getStringOrNull(
_.internalsOf<StorageInternals>(this, 'Storage', 'getItem').storage.get(
String(key)
)
)
}
key(index: number): string | null {
return getStringOrNull(
[
..._.internalsOf<StorageInternals>(
this,
'Storage',
'key'
).storage.keys(),
][Number(index) || 0]
)
}
removeItem(key: string): void {
_.internalsOf<StorageInternals>(this, 'Storage', 'getItem').storage.delete(
String(key)
)
}
setItem(key: string, value: any): void {
_.internalsOf<StorageInternals>(this, 'Storage', 'getItem').storage.set(
String(key),
String(value)
)
}
get length() {
return _.internalsOf<StorageInternals>(this, 'Storage', 'size').storage.size
}
}
const getStringOrNull = (value: string | void) =>
typeof value === 'string' ? value : null
export const initStorage = (target: Target, exclude: Set<string>) => {
if (exclude.has('Storage') || exclude.has('localStorage')) return
target.localStorage = Object.create(Storage.prototype)
const storageInternals = new Map<string, string>()
_.INTERNALS.set(target.localStorage, {
storage: storageInternals,
} as StorageInternals)
}
interface StorageInternals {
storage: Map<string, string>
}
interface Target {
localStorage: Storage
}
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