public PostScrapeHistory ScrapePosts([FromBody] PostScrapeRequest request)
{
Debug.Assert(request != null);
Console.WriteLine("Started Scraping");
// If no specific pages were specified, scrape them all.
PageMetadata[] pages;
if (request.Pages == null)
{
pages = PageMetadataRepository.All().Data.ToArray();
}
else
{
pages = request.Pages.Select(p => PageMetadataRepository.Get(p)).ToArray();
}
int numberOfComments = 0;
ScrapedPost[] posts = PostScraper.Scrape(pages, request.Since, request.Until).ToArray();
Console.WriteLine($"Started scraping comments for {posts.Length} posts");
foreach (ScrapedPost post in posts)
{
ScrapedComment[] comments = CommentScraper.Scrape(post).ToArray();
numberOfComments += comments.Length;
Console.WriteLine(numberOfComments);
}
Console.WriteLine($"Done scraping {pages.Length} pages. Scraped {posts.Length} posts with {numberOfComments} comments");
var postScrape = new PostScrapeHistory
{
Id = Guid.NewGuid().ToString(),
Since = request.Since,
Until = request.Until,
ImportStart = posts.FirstOrDefault()?.Scraped ?? DateTime.Now,
ImportEnd = DateTime.Now,
NumberOfPosts = posts.Length,
NumberOfComments = numberOfComments,
Pages = pages
};
return(PostScrapeHistoryRepository.Save(postScrape));
}
public PageScrapeHistory ScrapePages([FromBody] IEnumerable <string> request)
{
// If no pages were specified, scrape them all.
PageMetadata[] pagesToScrape;
if (request == null)
{
pagesToScrape = PageMetadataRepository.All().Data.ToArray();
}
else
{
pagesToScrape = request.Select(id => PageMetadataRepository.Get(id)).ToArray();
}
DateTime scrapeStart = DateTime.Now;
ScrapedPage[] pages = PageScraper.Scrape(pagesToScrape, scrapeStart).ToArray();
// Now update the per-page list of all scraped pages.
foreach (PageMetadata pageMetadata in pagesToScrape)
{
ScrapedPage scrapedPage = pages.First(p => p.FacebookId == pageMetadata.FacebookId);
pageMetadata.FanCountHistory.Insert(0, new DatedFanCount
{
Date = scrapedPage.Date,
FanCount = scrapedPage.FanCount,
});
pageMetadata.LatestScrape = scrapeStart;
PageMetadataRepository.Save(pageMetadata, Refresh.False);
// Only save the fan count on this date.
pageMetadata.FanCountHistory = pageMetadata.FanCountHistory.Take(1).ToList();
}
// Now update the total-page list of the scrape.
var pageScrapeHistory = new PageScrapeHistory
{
Id = Guid.NewGuid().ToString(),
ImportStart = scrapeStart,
ImportEnd = DateTime.Now,
Pages = pagesToScrape
};
return(PageScrapeHistoryRepository.Save(pageScrapeHistory));
}
