74 lines
1.8 KiB
PHP
74 lines
1.8 KiB
PHP
<?php
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/**
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* @file src/Content/Text/Plaintext.php
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*/
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namespace Friendica\Content\Text;
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class Plaintext
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{
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/**
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* Shortens message
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*
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* @param string $msg
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* @param int $limit
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* @return string
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*
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* @todo For Twitter URLs aren't shortened, but they have to be calculated as if.
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*/
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public static function shorten($msg, $limit)
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{
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$lines = explode("\n", $msg);
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$msg = "";
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$recycle = html_entity_decode("♲ ", ENT_QUOTES, 'UTF-8');
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$ellipsis = html_entity_decode("…", ENT_QUOTES, 'UTF-8');
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foreach ($lines as $row => $line) {
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if (iconv_strlen(trim($msg . "\n" . $line), "UTF-8") <= $limit) {
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$msg = trim($msg . "\n" . $line);
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} elseif (($msg == "") || (($row == 1) && (substr($msg, 0, 4) == $recycle))) {
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// Is the new message empty by now or is it a reshared message?
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$msg = iconv_substr(iconv_substr(trim($msg . "\n" . $line), 0, $limit, "UTF-8"), 0, -3, "UTF-8") . $ellipsis;
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} else {
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break;
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}
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}
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return $msg;
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}
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/**
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* Returns the character positions of the provided boundaries, optionally skipping a number of first occurrences
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*
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* @param string $text Text to search
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* @param string $open Left boundary
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* @param string $close Right boundary
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* @param int $occurrences Number of first occurrences to skip
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* @return boolean|array
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*/
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public static function getBoundariesPosition($text, $open, $close, $occurrences = 0)
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{
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if ($occurrences < 0) {
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$occurrences = 0;
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}
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$start_pos = -1;
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for ($i = 0; $i <= $occurrences; $i++) {
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if ($start_pos !== false) {
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$start_pos = strpos($text, $open, $start_pos + 1);
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}
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}
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if ($start_pos === false) {
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return false;
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}
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$end_pos = strpos($text, $close, $start_pos);
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if ($end_pos === false) {
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return false;
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}
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$res = ['start' => $start_pos, 'end' => $end_pos];
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return $res;
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}
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}
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