import {Result} from 'result'
import logger from 'log'

const log = logger('misc')

export function a2str(buf: Uint8Array) : string {
    // @ts-ignore
    return String.fromCharCode.apply(null, buf)
}
export function str2a(str: string) : Uint8Array {
    const buf = new Uint8Array(str.length)

    for (let i= 0, strLen = str.length; i < strLen; i++) {
        buf[i] = str.charCodeAt(i)
    }

    return buf
}

export function a2b64(buf: Uint8Array) : string {
    return btoa(a2str(buf))
}
export function b642a(b64: string) : Result<Uint8Array> {
    log.trace('b642a')

    try {
        return Result.ok(str2a(atob(b64)))
    } catch (e) {
        log.warn('b64 decode failed')
        log.debug(`error : ${e}`)
    }

    return Result.error([])
}