interface DiscoursePostResponse {

featured_link?: string;

post_stream?: DiscoursePostStream;

}

interface DiscoursePostStream {

posts?: DiscoursePost[];

}

interface DiscoursePost {

link_counts?: DiscourseLinkCount[];

}

interface DiscourseLinkCount {

url?: string;

}

export function extractSharedIdFromPostUrl(url: string): Promise<string> {

// https://docs.discourse.org/#tag/Posts%2Fpaths%2F~1posts~1%7Bid%7D.json%2Fget

return pxt.Util.httpGetJsonAsync(url + ".json")

.then((json: DiscoursePostResponse) => {

// extract from post_stream

let projectId = json.post_stream

&& json.post_stream.posts

&& json.post_stream.posts[0]

&& json.post_stream.posts[0].link_counts

.map(link => pxt.Cloud.parseScriptId(link.url))

.filter(id => !!id)[0];

return projectId;

});

}