R/rah_metrics.R

In Leszek-Sieminski/RAhrefs: 'Ahrefs' API R Interface

#' Export metrics about the target, such as total number of backlinks, referring pages, etc., that are similar to the Site Explorer Overview page with the addition of stats for total number of HTML pages, internal and external links.
#'
#' @param target character string. Aim of a request: a domain, a directory or a URL
#' @param token character string. Authentication token. Should be available through enviromental variables
#'     after authentication with function \code{rah_auth()}
#' @param mode character string. Mode of operation: exact, domain, subdomains or prefix. See more in Details section
#' @param metrics character vector of columns to select. See more in Details section
#' @param limit integer. Number of results to return
#' @param order_by character vector of columns to sort on. See more in Details section
#' @param where character string - a condition created by \code{rah_condition_set()} function that generates proper
#'     \code{"where"} condition to satisfy. See more in Details section
#' @param having character string - a condition created by \code{rah_condition_set()} function that generates proper
#'     \code{"having"} condition to satisfy. See more in Details section
#'
#' @source \url{https://ahrefs.com/api/documentation}
#'
#' @details
#'     \strong{1. available metrics} - you can select which columns (metrics) you want to download and which one
#'     would be useful in filtering, \strong{BUT not all of them can always be used} in \code{"where"} &
#'     \code{"having"} conditions:
#'
#'     \tabular{lllll}{
#'     Column \tab Type \tab Where \tab Having \tab Description\cr
#'     backlinks      \tab int \tab - \tab - \tab Number of external backlinks found on the referring pages that link to the target.                                                  \cr
#'     refpages       \tab int \tab - \tab - \tab Number of external web pages containing at least one backlink that links to the target.                                             \cr
#'     pages          \tab int \tab - \tab - \tab Number of unique pages visited by the Ahrefs crawler on the target.                                                                 \cr
#'     text           \tab int \tab - \tab - \tab Number of backlinks that use anchor texts.                                                                                          \cr
#'     image          \tab int \tab - \tab - \tab Number of backlinks that use image as an anchor.                                                                                    \cr
#'     nofollow       \tab int \tab - \tab - \tab Number of NoFollow backlinks that link to the target.                                                                               \cr
#'     dofollow       \tab int \tab - \tab - \tab Number of DoFollow backlinks that link to the target.                                                                               \cr
#'     redirect       \tab int \tab - \tab - \tab Number of redirects found that forward to the target.                                                                               \cr
#'     canonical      \tab int \tab - \tab - \tab Number of canonical backlinks that link to the target.                                                                              \cr
#'     gov            \tab int \tab - \tab - \tab Number of backlinks of all types (including images and NoFollow) found on web pages on governmental domains that link to the target.\cr
#'     edu            \tab int \tab - \tab - \tab Number of backlinks of all types (including images and NoFollow) found on web pages on educational domains that link to the target. \cr
#'     html_pages     \tab int \tab - \tab - \tab Number of HTML pages the target link has.                                                                                           \cr
#'     links_internal \tab int \tab - \tab - \tab Number of internal links found in the target.                                                                                       \cr
#'     links_external \tab int \tab - \tab - \tab Number of external links found in the target.
#'     }
#'
#'     \strong{2. \code{"mode"}} parameter can take 4 different values that will affect how the results will be grouped.
#'
#' Example of URL directory with folder:
#'     \itemize{
#'       \item \strong{Example URL:} ahrefs.com/api/
#'       \item \strong{exact:} ahrefs.com/api/
#'       \item \strong{domain:} ahrefs.com/*
#'       \item \strong{subdomains:} *ahrefs.com/*
#'       \item \strong{prefix:} ahrefs.com/api/*
#'     }
#' Example of URL directory with subdomain:
#'     \itemize{
#'       \item \strong{Example URL:} apiv2.ahrefs.com
#'       \item \strong{exact:} apiv2.ahrefs.com/
#'       \item \strong{domain:} apiv2.ahrefs.com/*
#'       \item \strong{subdomains:} *apiv2.ahrefs.com/*
#'       \item \strong{prefix:} apiv2.ahrefs.com/*
#'     }
#'
#'    \strong{3. \code{"order_by"}} parameter is a character string that forces sorting of the results. Structure:
#'     \itemize{
#'       \item \strong{Structure:} "\code{column_name}:asc|desc"
#'       \item \strong{Single column example:} "first_seen:asc" ~ this sorts results by \code{first_seen}
#'       column in ascending order
#'       \item \strong{Multi column example:} "last_seen:desc,first_seen:asc" ~ this sorts results
#'           by 1) \code{last_seen} column in descending order, and next by 2) \code{first_seen} column in
#'           ascending order
#'     }
#'
#'     \strong{4. \code{"where"} & \code{"having"}} are \strong{EXPERIMENTAL} parameters of condition sets
#'         (character strings) that control filtering the results. To create arguments:
#'         \enumerate{
#'           \item use \code{rah_condition()} function to create a single condition, for example:
#'               \code{cond_1 <- rah_condition(column_name = "links", operator = "GREATER_THAN", value = "10")}
#'           \item use \code{rah_condition_set()} function to group single conditions into final condition
#'               string, for example: \code{fin_cond <- rah_condition_set(cond_1, cond_2)}
#'           \item provide final condition to proper report function as a parameter, for example:
#'               \code{RAhrefs::rah_metrics(target = "ahrefs.com", token = "0123456789",
#'               mode = "domain", metrics = NULL, limit = 1000, where = fin_cond, order_by = "first_seen:asc")}
#'         }
#'
#' @return data frame
#' @export
#'
#' @family Ahrefs reports
#'
#' @examples
#' \dontrun{
#' # downloading
#' b <- RAhrefs::rah_metrics(
#'   target   = "ahrefs.com",
#'   limit    = 2,,
#'   order_by = "backlinks:desc")
#' }
rah_metrics <- function(
  target,
  token    = Sys.getenv("AHREFS_AUTH_TOKEN"),
  mode     = "domain",
  metrics  = NULL,
  limit    = 1000,
  order_by = NULL,
  where    = NULL,
  having   = NULL)
{
  data_list <- rah_downloader(
    target   = target,
    report   = "metrics",
    token    = token,
    mode     = mode,
    metrics  = metrics,
    limit    = limit,
    order_by = order_by,
    where    = where,
    having   = having)

  data_df <- data.frame(t(sapply(data_list, unlist)))
  return(data_df)
}

# b <- rah_metrics(target = "ahrefs.com", limit = 10)
# str(b)