R⁶ — Capture Tweets with tweet_shot()

December 30, 2017
By

(This article was first published on R – rud.is, and kindly contributed to R-bloggers)

(You can find all R⁶ posts here)

A Twitter discussion:

that spawned from Maëlle’s recent look-back post turned into a quick function for capturing an image of a Tweet/thread using webshot, rtweet, magick and glue.

Pass in a status id or a twitter URL and the function will grab an image of the mobile version of the tweet.

The ultimate goal is to make a function that builds a tweet using only R and magick. This will have to do until the new year.

tweet_shot <- function(statusid_or_url, zoom=3) {

  require(glue, quietly=TRUE)
  require(rtweet, quietly=TRUE)
  require(magick, quietly=TRUE)
  require(webshot, quietly=TRUE)

  x <- statusid_or_url[1]

  is_url <- grepl("^http[s]://", x)

  if (is_url) {

    is_twitter <- grepl("twitter", x)
    stopifnot(is_twitter)

    is_status <- grepl("status", x)
    stopifnot(is_status)

    already_mobile <- grepl("://mobile\\.", x)
    if (!already_mobile) x <- sub("://twi", "://mobile.twi", x)

  } else {

    x <- rtweet::lookup_tweets(x)
    stopifnot(nrow(x) > 0)
    x <- glue_data(x, "https://mobile.twitter.com/{screen_name}/status/{status_id}")

  }

  tf <- tempfile(fileext = ".png")
  on.exit(unlink(tf), add=TRUE)

  webshot(url=x, file=tf, zoom=zoom)

  img <- image_read(tf)
  img <- image_trim(img)

  if (zoom > 1) img <- image_scale(img, scales::percent(1/zoom))

  img

}

Now just do one of these:

tweet_shot("947082036019388416")
tweet_shot("https://twitter.com/jhollist/status/947082036019388416")

to get:

To leave a comment for the author, please follow the link and comment on their blog: R – rud.is.

R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...



If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Search R-bloggers

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)