SpotifyScript.ts

    })
    const extensions = JSON.stringify({
        persistedQuery: {
            version: 1,
            sha256Hash: "469874edcad37b7a379d4f22f0083a49ea3d6ae097916120d9bbe3e36ca79e9d"
        }
    })
    const url = new URL(QUERY_URL)
    url.searchParams.set("operationName", "queryAlbumTracks")
    url.searchParams.set("variables", variables)
    url.searchParams.set("extensions", extensions)
    return { url: url.toString(), headers: { Authorization: `Bearer ${local_state.bearer_token}` } }
}
/**
 * 
 * @param album_uri_id 
 * @param offset the track to start loading from in the album (0 is the first track)
 * @param limit the maximum number of tracks to load information about
 * @returns 
 */
function album_metadata_args(album_uri_id: string, offset: number, limit: number): { readonly url: string, readonly headers: { Authorization: string } } {
    const variables = JSON.stringify({
        uri: `spotify:album:${album_uri_id}`,
        locale: "",
        offset: offset,
        limit: limit
    })
    const extensions = JSON.stringify({
        persistedQuery: {
            version: 1,
            sha256Hash: "469874edcad37b7a379d4f22f0083a49ea3d6ae097916120d9bbe3e36ca79e9d"
        }
    })
    const url = new URL(QUERY_URL)
    url.searchParams.set("operationName", "getAlbum")
    url.searchParams.set("variables", variables)
    url.searchParams.set("extensions", extensions)
    return { url: url.toString(), headers: { Authorization: `Bearer ${local_state.bearer_token}` } }
}
//#endregion

//#region utilities
function id_from_uri(uri: string): string {
    const match_result = uri.match(/^spotify:(show|album|track|artist):([0-9a-zA-Z]*)$/)
    if (match_result === null) {
        throw new ScriptException("regex error")
    }
    const uri_id = match_result[2]
    if (uri_id === undefined) {
        throw new ScriptException("regex error")
    }
    return uri_id
}

/**
 * Converts seconds to the timestamp format used in WebVTT
 * @param seconds 
 * @returns 
 */
function milliseconds_to_WebVTT_timestamp(milliseconds: number) {
    return new Date(milliseconds).toISOString().substring(11, 23)
}

function assert_never(value: never) {
    log(value)
}

function log_passthrough<T>(value: T): T {
    log(value)
    return value
}
function assert_no_fall_through(value: never): void
function assert_no_fall_through(value: never, exception_message: string): ScriptException
function assert_no_fall_through(value: never, exception_message?: string): ScriptException | undefined {
    log(["Spotify log:", value])
    if (exception_message !== undefined) {
        return new ScriptException(exception_message)
    }
    return
}
//#endregion

//#region bad
function is_premium(): boolean {
    return false
}


// https://open.spotifycdn.com/cdn/build/web-player/vendor~web-player.391a2438.js
const Z = "0123456789abcdef"
const Q = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
const ee: string[] = []
ee.length = 256
for (let ke = 0; ke < 256; ke++)
    // @ts-expect-error
    ee[ke] = Z[ke >> 4] + Z[15 & ke]
const te: number[] = []
te.length = 128
for (let ke = 0; ke < Q.length; ++ke)
    te[Q.charCodeAt(ke)] = ke

function get_gid(song_uri_id: string) {
    return 22 === song_uri_id.length ? function (e) {
        if (22 !== e.length)
            return null
        const t = 2.3283064365386963e-10
            , n = 4294967296
            , i = 238328
        let o, r, a, s, c
        // @ts-expect-error
        return o = 56800235584 * te[e.charCodeAt(0)] + 916132832 * te[e.charCodeAt(1)] + 14776336 * te[e.charCodeAt(2)] + 238328 * te[e.charCodeAt(3)] + 3844 * te[e.charCodeAt(4)] + 62 * te[e.charCodeAt(5)] + te[e.charCodeAt(6)],
            r = o * t | 0,
            o -= r * n,
            // @ts-expect-error
            c = 3844 * te[e.charCodeAt(7)] + 62 * te[e.charCodeAt(8)] + te[e.charCodeAt(9)],
            o = o * i + c,
            o -= (c = o * t | 0) * n,
            r = r * i + c,
            // @ts-expect-error
            c = 3844 * te[e.charCodeAt(10)] + 62 * te[e.charCodeAt(11)] + te[e.charCodeAt(12)],
            o = o * i + c,
            o -= (c = o * t | 0) * n,
            r = r * i + c,
            r -= (c = r * t | 0) * n,
            a = c,
            // @ts-expect-error
            c = 3844 * te[e.charCodeAt(13)] + 62 * te[e.charCodeAt(14)] + te[e.charCodeAt(15)],
            o = o * i + c,
            o -= (c = o * t | 0) * n,
            r = r * i + c,
            r -= (c = r * t | 0) * n,
            a = a * i + c,
            // @ts-expect-error
            c = 3844 * te[e.charCodeAt(16)] + 62 * te[e.charCodeAt(17)] + te[e.charCodeAt(18)],
            o = o * i + c,
            o -= (c = o * t | 0) * n,
            r = r * i + c,
            r -= (c = r * t | 0) * n,
            a = a * i + c,
            a -= (c = a * t | 0) * n,
            s = c,
            // @ts-expect-error
            c = 3844 * te[e.charCodeAt(19)] + 62 * te[e.charCodeAt(20)] + te[e.charCodeAt(21)],
            o = o * i + c,
            o -= (c = o * t | 0) * n,
            r = r * i + c,
            r -= (c = r * t | 0) * n,
            a = a * i + c,
            a -= (c = a * t | 0) * n,
            s = s * i + c,
            s -= (c = s * t | 0) * n,
            // @ts-expect-error
            c ? null : ee[s >>> 24] + ee[s >>> 16 & 255] + ee[s >>> 8 & 255] + ee[255 & s] + ee[a >>> 24] + ee[a >>> 16 & 255] + ee[a >>> 8 & 255] + ee[255 & a] + ee[r >>> 24] + ee[r >>> 16 & 255] + ee[r >>> 8 & 255] + ee[255 & r] + ee[o >>> 24] + ee[o >>> 16 & 255] + ee[o >>> 8 & 255] + ee[255 & o]
    }(song_uri_id) : song_uri_id
}
//#endregion

// export statements are removed during build step
// used for unit testing in SpotifyScript.test.ts
// export {
    get_gid,
    assert_never,
    log_passthrough
}