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<?php

include "lib/mysql.php";

$result = mysql_run_query(
  "SELECT DISTINCT " .
  "`todos`.`id`," .
  "`todos`.`file`," .
  "`todos`.`line`," .
  "`todos`.`description` " .
  "FROM `todos`;"
);

if (isset($_GET["graph"])) {

  if ($result -> num_rows > 0) {

    while ($row = $result->fetch_assoc())
      $knot_rows[$row["id"]] =
        $row["file"]. " (line ".$row["line"]."):\\n".str_replace("\"","\\\"",$row["description"]);

    unset($knots);
    foreach ($knot_rows as $knot)
      $knots=$knots . "\"" . $knot . "\";\n";

  }

  $result = mysql_run_query(
    "SELECT DISTINCT " .
    "`todo_links`.`dependent`," .
    "`todo_links`.`depending_on` " .
    "FROM `todo_links`;"
  );

  if ($result -> num_rows > 0) {
    $count = 0;
    while ($row = $result->fetch_assoc()) {
      $link_rows[$count]["dependent"] =
        $knot_rows[$row["dependent"]];
      $link_rows[$count]["depending_on"] =
        $knot_rows[$row["depending_on"]];
      $count++;
    }

    unset($edges);
    foreach ($link_rows as $link)
      $edges=$edges . "\"" . $link["depending_on"] . "\" -> \"" . $link["dependent"] . "\";\n";
  }

  $knots = str_replace("\$","\\\$",$knots);
  $edges = str_replace("\$","\\\$",$edges);

  header ("Content-type: image/png");
  passthru(
    "dot -Tpng -o/dev/stdout /dev/stdin <<EOF\n" .
    "digraph dependencies {\n" .
    "rankdir=LR;\n" .
    "fontname=dejavu;\n" .
    $knots .
    $edges .
    "}\n" .
    "EOF\n"
  );

} else { // isset($_GET["graph"])

  if ($result -> num_rows > 0) {

    print "<html>\n";
    print "<head>\n";
    print "<title>Todos in the build scripts</title>\n";
    print "</head>\n";
    print "<body>\n";

    while ($row = $result->fetch_assoc()) {
      print "<a href=\"#TODO" . $row["id"] . "\">TODO #" . $row["id"] . "</a>";
      print " - ";
      print "<a href=\"https://github.com/archlinux32/builder/blob/master/" . $row["file"] . "#L" . $row["line"] . "\">" . $row["file"] . "(line " . $row["line"] . ")</a>";
      print ":<br>\n";
      print str_replace("\\n","<br>\n",$row["description"]);
      print "<br>\n";
      print "<br>\n";
    }

    print "</body>\n";
    print "</html>\n";

  }

}

?>