R/moncoes.R

In pedrodrocha/IRjournalsbr: A R package for scrapping metadata from Braziliam International Relations journals

#' Title
#'
#' @param year
#' @param volume
#' @param number
#' @param silence
#' @param full_text
#'
#' @return
#' @export
#'
#' @examples
moncoes <- function(
  year, volume, number, silence = TRUE, full_text = FALSE
) {

  # PART 0: ASSERTIONS
  assert(
    year = year,
    volume = volume,
    number = number,
    silence = silence,
    full_text = full_text
  )

  # PART 1: EDITIONS LINKS

  url_archive <- "https://ojs.ufgd.edu.br/index.php/moncoes/issue/archive"

  url_archive_lido <- xml2::read_html(url_archive)

  xml2::read_html(url_archive) %>%
    rvest::html_nodes('.series') %>%
    rvest::html_text() %>%
    stringr::str_remove_all("\\n|\\t") -> eds

  xml2::read_html(url_archive) %>%
    rvest::html_nodes('.obj_issue_summary .title') %>%
    rvest::html_attr('href') -> primary_url




  tibble::tibble(url = primary_url,
                 editions = eds) %>%
    dplyr::mutate(
      vol = stringr::str_extract(editions, "(v. [0-9]{2})|(v. [0-9]{1})") %>%
        stringr::str_replace_all(.,'v. ','') %>%
        as.integer(.),
      n = stringr::str_extract(editions,'(n. [0-9]{2})|(n. [0-9]{1})') %>%
        stringr::str_replace_all(.,'n. ','') %>%
        as.integer(.),
      ano = stringr::str_extract(editions,"[0-9]{4}") %>%
        as.double(.),
      ano = dplyr::case_when(
        vol == 4 ~ 2015,
        vol == 3 ~ 2014,
        vol == 2 ~ 2013,
        vol == 1 ~ 2012,
        TRUE ~ ano
      ),
      editions = paste0("v. ",vol," n. ",n," (", ano,")"),
      url = paste0(url, "/showToc")
    ) %>%
    dplyr::filter(ano %in% year &
                    n %in% number &
                    vol %in% volume) %>%
    dplyr::pull(url) -> primary_url



  # PART II: ARTICLES LINKS

  articles_url <- purrr::map(primary_url, function(x) {

    url_lido <- xml2::read_html(x)

    url_lido %>%
      rvest::html_nodes('.title a') %>%
      rvest::html_attr('href')  -> links

    url_lido %>%
      rvest::html_nodes('.title a') %>%
      rvest::html_text()  %>%
      stringr::str_remove_all("\\n|\\t")-> names


    tibble::tibble(
      links = links,
      names = names
    ) %>%
      dplyr::pull(links)

  }) %>%
    purrr::flatten_chr()

  # PART III: SCRAPPING METADATA

  moncoes <- purrr::map_dfr(articles_url, function(x) {
    if(!isTRUE(silence)) {
      usethis::ui_info(paste0('Currently scraping: ', x))
    }


    url_lido <- xml2::read_html(x)

    ## A) Filiation

    url_lido %>%
      rvest::html_nodes('meta[name="citation_author_institution"]') %>%
      rvest::html_attr('content') -> filiation




    ## B) Authors

    url_lido %>%
      rvest::html_nodes('meta[name="citation_author"]') %>%
      rvest::html_attr('content') %>%
      stringr::str_trim() -> authors

    if(length(filiation) == 0){
      filiation <- NA
    } else if(length(filiation) != length(authors)) {
      filiation <- NA

    }

    ## C) Title

    url_lido %>%
      rvest::html_node('meta[name="DC.Title"]') %>%
      rvest::html_attr('content') -> title

    ## D) Abstract

    url_lido %>%
      rvest::html_node(".abstract") %>%
      rvest::html_text() -> abstract

    if(length(abstract) == 0){ abstract <- NA }

    ## E) DOI

    url_lido %>%
      rvest::html_nodes('meta[name="DC.Identifier.DOI"]') %>%
      rvest::html_attr('content') -> doi

    if(length(doi) == 0){ doi <- NA }

    ## F) Pages

    url_lido %>%
      rvest::html_nodes('meta[name="DC.Identifier.pageNumber"]') %>%
      rvest::html_attr('content') -> pages

    if(length(pages) == 0){ pages <- NA }

    ## G) Language

    url_lido %>%
      rvest::html_nodes('meta[name="DC.Language"]') %>%
      rvest::html_attr('content') -> language

    if(length(language) == 0){ language <- NA }

    ## H) Volume

    url_lido %>%
      rvest::html_nodes('meta[name="DC.Source.Volume"]') %>%
      rvest::html_attr('content') -> volume


    ## I) Number

    url_lido %>%
      rvest::html_nodes('meta[name="DC.Source.Issue"]') %>%
      rvest::html_attr('content') -> number


    ## J) Year

    url_lido %>%
      rvest::html_nodes('meta[name="citation_date"]') %>%
      rvest::html_attr('content') %>%
      stringr::str_extract('[0-9]{4}')-> year

    if(is.na(year)) {
      if(volume == 1) { year <- "2012"}
      else if(volume == 2) {year <- "2013"}
      else if(volume == 3) {year <- "2014"}
      else if(volume == 4) {year <- "2015"}
    }


    ## K) Keywords

    url_lido %>%
      rvest::html_nodes('meta[name="citation_keywords"]') %>%
      rvest::html_attr('content') %>%
      paste0(., collapse = ';')-> keywords

    if(length(keywords) == 0){
      url_lido %>%
        rvest::html_nodes('.keywords .value')  %>%
        rvest::html_text() %>%
        stringr::str_squish() %>%
        stringr::str_replace_all(.,'(\\.)|(,)',';') -> keywords

      if(length(keywords) == 0){
        keywords <- "NA"
      } else if(keywords == "") {
        keywords <- "NA"
      }
    } else if(keywords == "") {

      url_lido %>%
        rvest::html_nodes('.keywords .value')  %>%
        rvest::html_text() %>%
        stringr::str_squish() %>%
        stringr::str_replace_all(.,'(\\.)|(,)',';') -> keywords


      if(length(keywords) == 0){
        keywords <- "NA"
      } else if(keywords == "") {
        keywords <- "NA"
      }
    }


    ## L) References

    url_lido %>%
      rvest::html_nodes(".value p") %>%
      rvest::html_text() %>%
      paste0("\\t", .,"\\t") %>%
      toString() -> references


    if(length(references) == 0){references <- NA }


    ## M) Url_pdf

    url_lido %>%
      rvest::html_nodes('meta[name="citation_pdf_url"]') %>%
      rvest::html_attr('content') -> pdf_url

    if(length(pdf_url) == 0){pdf_url <- ""}




  build_data(
    authors = authors,
    filiation = filiation,
    title = title,
    abstract = abstract,
    keywords = keywords,
    references = references,
    pages = pages,
    year = year,
    volume = volume,
    number = number,
    language = language ,
    doi = doi,
    x = x,
    pdf_url = pdf_url,
    full_text = full_text,
    journal = "Monções: Revista de Relações Internacionais da UFGD",
    issn = '2316-8323'
  )

  })

  moncoes %>%
    dplyr::na_if('\\t\\t') %>%
    dplyr::na_if('\\t.\\t') %>%
    dplyr::group_by(TI) %>%
    dplyr::mutate(
      AU = stringr::str_c(AU,collapse = ";"),
      OG = stringr::str_c(OG,collapse = ";")
    ) %>%
    dplyr::distinct() %>%
    dplyr::ungroup() %>%
    dplyr::mutate(
      AB = stringr::str_squish(AB)
    )

}