private function replacePhrases($data, $phrases, Progress $progress, float $progressModifier)
{
$phrases = array_filter($phrases, function ($value) {
return !empty($value);
});
usort($phrases, function ($a, $b) use($data) {
$aUses = substr_count($data, $a) * strlen($a);
$bUses = substr_count($data, $b) * strlen($b);
return $bUses <=> $aUses;
});
$replacements = [];
$i = 0;
foreach ($phrases as $phrase) {
$i++;
$progress->notify($i / count($phrases) + $progressModifier);
if (!strstr($data, $phrase)) {
// This phrase isn't even in the data. Skip it
continue;
}
$key = $this->findKey($data);
if (strlen($phrase) <= strlen($key)) {
// Do not bother if the key is as big as the word
$this->freeKey($key);
continue;
}
$usages = substr_count($data, $phrase);
$usedSpace = $usages * strlen($phrase);
$willUse = $usages * strlen($key) + strlen($key) + strlen($phrase) + 1;
if ($willUse >= $usedSpace) {
// Do not bother if the extra meta data means its overall larger with replacement
$this->freeKey($key);
continue;
}
$replacements[$phrase] = $key;
}
return $replacements;
}
