#' get_grade()
#'
#' This function takes a student's report card as input (vector), and extract the student's grade level.
#'
#' @param student_rcard A vector containing a student's report card information
#' @keywords student_rcard
#' @export
#' @examples
#' parsed_pdf <-read_pdf('my_pdf_file.pdf')
#' students_list <- split_students(parsed_pdf)
#' get_grade(students_list[[1]])
get_grade <- function(student_rcard){
#1 - Identify line(s) with student's grade level
# detect grade level element
grade_line <- stringr::str_detect(student_rcard, "Grade:")
# CHECK that pattern has been matched
assertthat::assert_that(sum(grade_line) > 0)
# Extract line containing grade level
student_rcard <- student_rcard[grade_line]
# Remove potential duplicates
student_rcard <- student_rcard[1]
# Remove blank spaces
student_rcard <- stringr::str_replace_all(student_rcard, " ", "")
#2 - Extract grade level
# Detect grade level information in the line
grade <- stringr::str_extract(student_rcard, stringr::regex("Grade:[0-9]+"))
# Remove extra information
grade <- stringr::str_replace(grade, "Grade:", "")
## Return student's grade level
return(list(c(grade = grade)))
}
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