使用带有更改的queryParams的rxjs进行递归HTTP调用

Question

我期望使用NestJS进行API调用的功能，并且如果我获得下次调用的令牌，那么我需要使用该令牌作为查询参数向同一API发出请求。限制是API仅返回50条没有令牌的记录，因此要获取下一条记录，我需要附加查询参数。如果令牌为空，我需要结束通话。根据特定的uploaderId从youtube获取视频。

我写的样本。

getPlaylistVideos(playlistId: string): any {
    this.videos = [];
    return new Promise((resolve, reject) =>
        this.http
            .get(this.getPlaylistURL(playlistId, ''))
            .pipe(
                map(response => response.data),
                tap(() => console.log('\t', `Getting details by URL: this.http.get(this.getPlaylistURL(${playlistId})`)),
                tap(videoResponse => {
                    this.videos.push(...videoResponse.items);
                    if (videoResponse['nextPageToken']) {
                        console.log('\t', 'NextToken: ', videoResponse['nextPageToken']);
                        return mergeMap(video => {
                            console.log('\t', `this.http.get(this.getPlaylistURL(${playlistId}, ${video['nextPageToken']})`);
                            return this.http.get(this.getPlaylistURL(playlistId, video['nextPageToken']));
                        });
                    } else {
                        console.log(`videoResponse:`, videoResponse['nextPageToken']);
                        return empty();
                    }
                })
            )
            .toPromise()
            .then(response => resolve(this.videos))
            .catch(err => reject(err))
    );
}

它无法获取下一组记录。