Shell Programming and Scripting

BEGIN {
        FS = "|"
        OFS = "|"
        IGNORECASE = 1
}
{
  full_line = $0
  eof = 1
  while (eof > 0) {
        eof = getline next_line
        if (eof <= 0)
        {
                sentiment(full_line)
        } else if (next_line !~ /^R\|/)
        {
          if ((full_line ~ / $/) || (next_line ~ /^ /)) {
                full_line = full_line next_line
          } else {
                full_line = full_line " " next_line
          }
        } else if (next_line ~ /^R\|/)
        {
                sentiment(full_line)
                full_line = next_line
        }
  }

}

function sentiment(LINE) {
        if (match(LINE, /(no[t]*|wasn[']*t|isn[']*t|ain[']*t) (that |very )*\y(good|great|best|excellent|brilliant|amazing|magificient|fantastic)\y/))
        {
                print LINE, "negative"
        }
        else if (match(LINE, /\y(shit|crap|awful|worst|stupid|idiotic|arsehole|bastard|shite|disgusting|nightmare|hate|hated|angry)(s)*\y/))
        {
                print LINE, "negative"
        }
        else if (match(LINE, /\y(good|great|best|positive|excellent|brilliant|amazing|magificient|fantastic)\y/))
        {
                print LINE, "positive"
        }
        else
        {
                print LINE, "neutral"
        }

}