public function Scan($letters)
{
$set = Dictionary::GetSet($letters);
$size = strlen($letters);
$words_play = array();
for ($direction = 0; $direction <= 1; $direction++) {
for ($index = 0; $index <= 14; $index++) {
switch ($direction) {
case 0:
$slice = $this->GetSlice(0, $index, 15, 0);
break;
case 1:
$slice = $this->GetSlice($index, 0, 15, 1);
break;
}
for ($this_size = $size; $this_size > 0; $this_size--) {
$position = 0;
do {
$pattern_info = $this->GetPattern($slice, $this_size, $position);
$start_position = $pattern_info['start_position'];
switch ($direction) {
case 0:
$x = $start_position;
$y = $index;
break;
case 1:
$x = $index;
$y = $start_position;
break;
}
if ($pattern_info['hit_tile'] || $this->HasAdjoining($x, $y, $direction, $this_size)) {
$words_found = $this->dictionary->FindWords($pattern_info['pattern'], $set);
$hit_tile = $pattern_info['hit_tile'];
foreach ($words_found as $word_found_info) {
$word_found = $word_found_info[0];
$blank_positions = $word_found_info[1];
$word_found_ok = true;
$score = 0;
$word_length = strlen($word_found);
for ($letter_index = 0; $letter_index < $word_length; $letter_index++) {
$letter = $word_found[$letter_index];
$is_blank = in_array($letter_index, $blank_positions);
$valid_word = array(true, 0);
switch ($direction) {
case 0:
if (!is_object($this->board[$pattern_info['start_position'] + $letter_index + $index * 15])) {
$valid_word = $this->ValidWord($letter, $is_blank, $pattern_info['start_position'] + $letter_index, $index, 1 - $direction);
}
break;
case 1:
if (!is_object($this->board[$index + ($pattern_info['start_position'] + $letter_index) * 15])) {
$valid_word = $this->ValidWord($letter, $is_blank, $index, $pattern_info['start_position'] + $letter_index, 1 - $direction);
}
break;
}
if (!$valid_word[0]) {
$word_found_ok = false;
break;
} else {
$score += $valid_word[1];
}
}
if ($word_found_ok) {
switch ($direction) {
case 0:
$score += $this->Score($word_found, $blank_positions, $start_position, $index, 0);
$words_play["{$word_found}|{$start_position}|{$index}|0"] = $score;
break;
case 1:
$score += $this->Score($word_found, $blank_positions, $index, $start_position, 1);
$words_play["{$word_found}|{$index}|{$start_position}|1"] = $score;
break;
}
}
}
}
$position++;
} while ($pattern_info['end_reached'] !== true);
}
}
}
return $words_play;
}
