src/Model/ItemContent.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/ItemContent.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text;
  11 use Friendica\Core\PConfig;
  12 use Friendica\Core\Protocol;
  13
  14 class ItemContent extends BaseObject
  15 {
  16         /**
  17          * @brief Convert a message into plaintext for connectors to other networks
  18          *
  19          * @param array  $item           The message array that is about to be posted
  20          * @param int    $limit          The maximum number of characters when posting to that network
  21          * @param bool   $includedlinks  Has an attached link to be included into the message?
  22          * @param int    $htmlmode       This controls the behavior of the BBCode conversion
  23          * @param string $target_network Name of the network where the post should go to.
  24          *
  25          * @return array Same array structure than \Friendica\Content\Text\BBCode::getAttachedData
  26          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  27          * @see   \Friendica\Content\Text\BBCode::getAttachedData
  28          *
  29          */
  30         public static function getPlaintextPost($item, $limit = 0, $includedlinks = false, $htmlmode = 2, $target_network = '')
  31         {
  32                 // Remove hashtags
  33                 $URLSearchString = '^\[\]';
  34                 $body = preg_replace("/([#@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $item['body']);
  35
  36                 // Add an URL element if the text contains a raw link
  37                 $body = preg_replace('/([^\]\=\'"]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism',
  38                         '$1[url]$2[/url]', $body);
  39
  40                 // Remove the abstract
  41                 $body = Text\BBCode::stripAbstract($body);
  42
  43                 // At first look at data that is attached via "type-..." stuff
  44                 // This will hopefully replaced with a dedicated bbcode later
  45                 //$post = self::getAttachedData($b['body']);
  46                 $post = Text\BBCode::getAttachedData($body, $item);
  47
  48                 if (($item['title'] != '') && ($post['text'] != '')) {
  49                         $post['text'] = trim($item['title'] . "\n\n" . $post['text']);
  50                 } elseif ($item['title'] != '') {
  51                         $post['text'] = trim($item['title']);
  52                 }
  53
  54                 $abstract = '';
  55
  56                 // Fetch the abstract from the given target network
  57                 if ($target_network != '') {
  58                         $default_abstract = Text\BBCode::getAbstract($item['body']);
  59                         $abstract = Text\BBCode::getAbstract($item['body'], $target_network);
  60
  61                         // If we post to a network with no limit we only fetch
  62                         // an abstract exactly for this network
  63                         if (($limit == 0) && ($abstract == $default_abstract)) {
  64                                 $abstract = '';
  65                         }
  66                 } else {// Try to guess the correct target network
  67                         switch ($htmlmode) {
  68                                 case 8:
  69                                         $abstract = Text\BBCode::getAbstract($item['body'], Protocol::TWITTER);
  70                                         break;
  71
  72                                 case 7:
  73                                         $abstract = Text\BBCode::getAbstract($item['body'], Protocol::STATUSNET);
  74                                         break;
  75
  76                                 default: // We don't know the exact target.
  77                                         // We fetch an abstract since there is a posting limit.
  78                                         if ($limit > 0) {
  79                                                 $abstract = Text\BBCode::getAbstract($item['body']);
  80                                         }
  81                         }
  82                 }
  83
  84                 if ($abstract != '') {
  85                         $post['text'] = $abstract;
  86
  87                         if ($post['type'] == 'text') {
  88                                 $post['type'] = 'link';
  89                                 $post['url'] = $item['plink'];
  90                         }
  91                 }
  92
  93                 $html = Text\BBCode::convert($post['text'] . ($post['after'] ?? ''), false, $htmlmode);
  94                 $msg = Text\HTML::toPlaintext($html, 0, true);
  95                 $msg = trim(html_entity_decode($msg, ENT_QUOTES, 'UTF-8'));
  96
  97                 $link = '';
  98                 if ($includedlinks) {
  99                         if ($post['type'] == 'link') {
 100                                 $link = $post['url'];
 101                         } elseif ($post['type'] == 'text') {
 102                                 $link = $post['url'] ?? '';
 103                         } elseif ($post['type'] == 'video') {
 104                                 $link = $post['url'];
 105                         } elseif ($post['type'] == 'photo') {
 106                                 $link = $post['image'];
 107                         }
 108
 109                         if (($msg == '') && isset($post['title'])) {
 110                                 $msg = trim($post['title']);
 111                         }
 112
 113                         if (($msg == '') && isset($post['description'])) {
 114                                 $msg = trim($post['description']);
 115                         }
 116
 117                         // If the link is already contained in the post, then it neeedn't to be added again
 118                         // But: if the link is beyond the limit, then it has to be added.
 119                         if (($link != '') && strstr($msg, $link)) {
 120                                 $pos = strpos($msg, $link);
 121
 122                                 // Will the text be shortened in the link?
 123                                 // Or is the link the last item in the post?
 124                                 if (($limit > 0) && ($pos < $limit) && (($pos + 23 > $limit) || ($pos + strlen($link) == strlen($msg)))) {
 125                                         $msg = trim(str_replace($link, '', $msg));
 126                                 } elseif (($limit == 0) || ($pos < $limit)) {
 127                                         // The limit has to be increased since it will be shortened - but not now
 128                                         // Only do it with Twitter (htmlmode = 8)
 129                                         if (($limit > 0) && (strlen($link) > 23) && ($htmlmode == 8)) {
 130                                                 $limit = $limit - 23 + strlen($link);
 131                                         }
 132
 133                                         $link = '';
 134
 135                                         if ($post['type'] == 'text') {
 136                                                 unset($post['url']);
 137                                         }
 138                                 }
 139                         }
 140                 }
 141
 142                 if ($limit > 0) {
 143                         // Reduce multiple spaces
 144                         // When posted to a network with limited space, we try to gain space where possible
 145                         while (strpos($msg, '  ') !== false) {
 146                                 $msg = str_replace('  ', ' ', $msg);
 147                         }
 148
 149                         // Twitter is using its own limiter, so we always assume that shortened links will have this length
 150                         if (iconv_strlen($link, 'UTF-8') > 0) {
 151                                 $limit = $limit - 23;
 152                         }
 153
 154                         if (iconv_strlen($msg, 'UTF-8') > $limit) {
 155                                 if (($post['type'] == 'text') && isset($post['url'])) {
 156                                         $post['url'] = $item['plink'];
 157                                 } elseif (!isset($post['url'])) {
 158                                         $limit = $limit - 23;
 159                                         $post['url'] = $item['plink'];
 160                                 } elseif (strpos($item['body'], '[share') !== false) {
 161                                         $post['url'] = $item['plink'];
 162                                 } elseif (PConfig::get($item['uid'], 'system', 'no_intelligent_shortening')) {
 163                                         $post['url'] = $item['plink'];
 164                                 }
 165                                 $msg = Text\Plaintext::shorten($msg, $limit);
 166                         }
 167                 }
 168
 169                 $post['text'] = trim($msg);
 170
 171                 return $post;
 172         }
 173 }