Assumes prereqs are written in this format: ACCT 101 (C) & ACCT 103 ACCT 102 (B)

Returns back a friendly array that makes everything easier to read.

File

modules/prereqs/prereqs.module, line 400

This is the module file for the prereqs module.

Code

function prereqs_get_prereq_array_from_string($prereqs_str, $school_id = 0) {

  $rtn = array();

  $db = get_global_database_handler();
  $c = 0;
  $lines = explode("\n", $prereqs_str);
  foreach ($lines as $line) {
    $line = fp_reduce_whitespace($line);
    $line = trim($line);
    if ($line == "") {
      continue; // skip blanks.
    }


    $courses = explode(" or ", $line);
    foreach ($courses as $course_line) {

      $course_line = trim(fp_reduce_whitespace($course_line));

      $temp = explode(" ", $course_line);

      $subject_id = trim($temp [0]);
      $course_num = trim($temp [1]);
      $min_grade = @trim(str_replace("(", "", $temp [2]));
      $min_grade = @trim(str_replace(")", "", $min_grade));

      // Was there a min grade stuck with the course_num?
      if (strstr($course_num, "(")) {
        $temp2 = explode("(", $course_num);
        $course_num = trim($temp2 [0]);
        $min_grade = trim(str_replace(")", "", $temp2 [1]));
      }

      // Okay, now that we have the subject_id and course_num, let's find the course_id (if it exists).
      $course_id = $db->get_course_id($subject_id, $course_num, '', FALSE, $school_id, TRUE);

      // Okay, add to our return array.
      $rtn [$c][] = array(
        "subject_id" => $subject_id,
        "course_num" => $course_num,
        "course_id" => $course_id,
        "min_grade" => $min_grade,
      );


    } //foreach courses    

    $c++;

  } // foreach line

  return $rtn;
}