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[friendica.git] / include / bb2diaspora.php
1 <?php
2
3 require_once("include/oembed.php");
4 require_once('include/event.php');
5
6 require_once('library/markdown.php');
7 require_once('include/html2bbcode.php');
8
9 // we don't want to support a bbcode specific markdown interpreter
10 // and the markdown library we have is pretty good, but provides HTML output.
11 // So we'll use that to convert to HTML, then convert the HTML back to bbcode,
12 // and then clean up a few Diaspora specific constructs.
13
14 function diaspora2bb($s) {
15
16         // for testing purposes: Collect raw markdown articles
17         // $file = tempnam("/tmp/friendica/", "markdown");
18         // file_put_contents($file, $s);
19
20         $s = html_entity_decode($s,ENT_COMPAT,'UTF-8');
21
22         // Too many new lines. So deactivated the following line
23         // $s = str_replace("\r","\n",$s);
24         // Simply remove cr.
25         $s = str_replace("\r","",$s);
26
27         // <br/> is invalid. Replace it with the valid expression
28         $s = str_replace("<br/>","<br />",$s);
29
30         $s = preg_replace('/\@\{(.+?)\; (.+?)\@(.+?)\}/','@[url=https://$3/u/$2]$1[/url]',$s);
31
32         // Escaping the hash tags - doesn't always seem to work
33         // $s = preg_replace('/\#([^\s\#])/','\\#$1',$s);
34         // This seems to work
35         $s = preg_replace('/\#([^\s\#])/','&#35;$1',$s);
36
37         $s = Markdown($s);
38
39         $s = str_replace('&#35;','#',$s);
40
41         $s = str_replace("\n",'<br />',$s);
42
43         $s = html2bbcode($s);
44 //      $s = str_replace('&#42;','*',$s);
45
46         // Convert everything that looks like a link to a link
47         $s = preg_replace("/([^\]\=]|^)(https?\:\/\/)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3]$2$3[/url]',$s);
48
49         //$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
50         $s = preg_replace("/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism",'[youtube]$2[/youtube]',$s);
51         $s = preg_replace("/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism",'[youtube]$1[/youtube]',$s);
52         $s = preg_replace("/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism",'[vimeo]$2[/vimeo]',$s);
53         $s = preg_replace("/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism",'[vimeo]$1[/vimeo]',$s);
54         // remove duplicate adjacent code tags
55         $s = preg_replace("/(\[code\])+(.*?)(\[\/code\])+/ism","[code]$2[/code]", $s);
56
57         // Don't show link to full picture (until it is fixed)
58         $s = scale_external_images($s, false);
59
60         return $s;
61 }
62
63
64 function stripdcode_br_cb($s) {
65         return '[code]' . str_replace('<br />', "\n\t", $s[1]) . '[/code]';
66 }
67
68
69
70 function bb2diaspora($Text,$preserve_nl = false) {
71
72         $ev = bbtoevent($Text);
73
74         // Replace any html brackets with HTML Entities to prevent executing HTML or script
75         // Don't use strip_tags here because it breaks [url] search by replacing & with amp
76
77         $Text = str_replace("<", "&lt;", $Text);
78         $Text = str_replace(">", "&gt;", $Text);
79
80         // If we find any event code, turn it into an event.
81         // After we're finished processing the bbcode we'll 
82         // replace all of the event code with a reformatted version.
83
84
85         if($preserve_nl)
86                 $Text = str_replace(array("\n","\r"), array('',''),$Text);
87
88         // Set up the parameters for a URL search string
89         $URLSearchString = "^\[\]";
90         // Set up the parameters for a MAIL search string
91         $MAILSearchString = $URLSearchString;
92
93         // Perform URL Search
94
95         // [img]pathtoimage[/img]
96
97         // the following was added on 10-January-2012 due to an inability of Diaspora's
98         // new javascript markdown processor to handle links with images as the link "text"
99         // It is not optimal and may be removed if this ability is restored in the future
100
101         $Text = preg_replace("/\[url\=([$URLSearchString]*)\]\[img\](.*?)\[\/img\]\[\/url\]/ism", 
102                 '![' . t('image/photo') . '](' . '$2' . ')' . "\n" . '[' . t('link') . '](' . '$1' . ')', $Text);
103
104         $Text = preg_replace("/\[bookmark\]([$URLSearchString]*)\[\/bookmark\]/ism", '[$1]($1)', $Text);
105         $Text = preg_replace("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", '[$2]($1)', $Text);
106
107         $Text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '[$1]($1)', $Text);
108         $Text = preg_replace("/\#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[#$2]($1)', $Text);
109         $Text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[$2]($1)', $Text);
110
111
112         $Text = preg_replace("/\[img\](.*?)\[\/img\]/", '![' . t('image/photo') . '](' . '$1' . ')', $Text);
113         $Text = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/", '![' . t('image/photo') . '](' . '$2' . ')', $Text);
114
115         // Perform MAIL Search
116         $Text = preg_replace("(\[mail\]([$MAILSearchString]*)\[/mail\])", '[$1](mailto:$1)', $Text);
117         $Text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '[$2](mailto:$1)', $Text);
118          
119         $Text = str_replace('*', '\\*', $Text);
120         $Text = str_replace('_', '\\_', $Text);
121
122         $Text = str_replace('`','\\`', $Text);
123
124         // Check for bold text
125         $Text = preg_replace("(\[b\](.*?)\[\/b\])is",'**$1**',$Text);
126
127         // Check for Italics text
128         $Text = preg_replace("(\[i\](.*?)\[\/i\])is",'_$1_',$Text);
129
130         // Check for Underline text
131 //      $Text = preg_replace("(\[u\](.*?)\[\/u\])is",'<u>$1</u>',$Text);
132
133         // Check for strike-through text
134 //      $Text = preg_replace("(\[s\](.*?)\[\/s\])is",'<strike>$1</strike>',$Text);
135
136         // Check for over-line text
137 //      $Text = preg_replace("(\[o\](.*?)\[\/o\])is",'<span class="overline">$1</span>',$Text);
138
139         // Check for colored text
140 //      $Text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])is","<span style=\"color: $1;\">$2</span>",$Text);
141
142         // Check for sized text
143 //      $Text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])is","<span style=\"font-size: $1;\">$2</span>",$Text);
144
145         // Check for list text
146 //      $Text = preg_replace("/\[list\](.*?)\[\/list\]/is", '<ul class="listbullet">$1</ul>' ,$Text);
147 //      $Text = preg_replace("/\[list=1\](.*?)\[\/list\]/is", '<ul class="listdecimal">$1</ul>' ,$Text);
148 //      $Text = preg_replace("/\[list=i\](.*?)\[\/list\]/s",'<ul class="listlowerroman">$1</ul>' ,$Text);
149 //      $Text = preg_replace("/\[list=I\](.*?)\[\/list\]/s", '<ul class="listupperroman">$1</ul>' ,$Text);
150 //      $Text = preg_replace("/\[list=a\](.*?)\[\/list\]/s", '<ul class="listloweralpha">$1</ul>' ,$Text);
151 //      $Text = preg_replace("/\[list=A\](.*?)\[\/list\]/s", '<ul class="listupperalpha">$1</ul>' ,$Text);
152 //      $Text = preg_replace("/\[li\](.*?)\[\/li\]/s", '<li>$1</li>' ,$Text);
153
154 //      $Text = preg_replace("/\[td\](.*?)\[\/td\]/s", '<td>$1</td>' ,$Text);
155 //      $Text = preg_replace("/\[tr\](.*?)\[\/tr\]/s", '<tr>$1</tr>' ,$Text);
156 //      $Text = preg_replace("/\[table\](.*?)\[\/table\]/s", '<table>$1</table>' ,$Text);
157
158 //      $Text = preg_replace("/\[table border=1\](.*?)\[\/table\]/s", '<table border="1" >$1</table>' ,$Text);
159 //      $Text = preg_replace("/\[table border=0\](.*?)\[\/table\]/s", '<table border="0" >$1</table>' ,$Text);
160
161         
162 //      $Text = str_replace("[*]", "<li>", $Text);
163
164         // Check for font change text
165 //      $Text = preg_replace("(\[font=(.*?)\](.*?)\[\/font\])","<span style=\"font-family: $1;\">$2</span>",$Text);
166
167
168     $Text = preg_replace_callback("/\[code\](.*?)\[\/code\]/is",'stripdcode_br_cb',$Text);
169
170         // Check for [code] text
171         $Text = preg_replace("/(\[code\])+(.*?)(\[\/code\])+/is","\t$2\n", $Text);
172
173
174
175
176         // Declare the format for [quote] layout
177         //      $QuoteLayout = '<blockquote>$1</blockquote>';                     
178         // Check for [quote] text
179         $Text = preg_replace("/\[quote\](.*?)\[\/quote\]/is",">$1\n\n", $Text);
180          
181         // Images
182
183         // html5 video and audio
184
185         $Text = preg_replace("/\[video\](.*?)\[\/video\]/", '$1', $Text);
186
187         $Text = preg_replace("/\[audio\](.*?)\[\/audio\]/", '$1', $Text);
188
189 //      $Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/", '<iframe src="$1" width="425" height="350"><a href="$1">$1</a></iframe>', $Text);
190          
191         // [img=widthxheight]image source[/img]
192 //      $Text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/", '<img src="$3" style="height:{$2}px; width:{$1}px;" >', $Text);
193
194     $Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text); 
195     $Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text); 
196     $Text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text); 
197         $Text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", 'http://www.youtube.com/watch?v=$1', $Text);
198
199         $Text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism",'http://vimeo.com/$1',$Text); 
200         $Text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism",'http://vimeo.com/$1',$Text); 
201         $Text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", 'http://vimeo.com/$1',$Text);
202
203
204         $Text = str_replace('[nosmile]','',$Text);
205
206         // oembed tag
207         //      $Text = oembed_bbcode2html($Text);
208
209         // If we found an event earlier, strip out all the event code and replace with a reformatted version.
210
211         if(x($ev,'desc') && x($ev,'start')) {
212
213                 $sub = format_event_diaspora($ev);
214         
215                 $Text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/is",$sub,$Text);
216                 $Text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/is",'',$Text);
217                 $Text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/is",'',$Text);
218                 $Text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/is",'',$Text);
219                 $Text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/is",'',$Text);
220         }
221
222         $Text = preg_replace("/\<(.*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism",'<$1$2=$3&$4>',$Text);
223
224         $Text = preg_replace('/\[(.*?)\]\((.*?)\\\\_(.*?)\)/ism','[$1]($2_$3)',$Text);
225         
226         call_hooks('bb2diaspora',$Text);
227
228         return $Text;
229 }
230
231 function format_event_diaspora($ev) {
232
233         $a = get_app();
234
235         if(! ((is_array($ev)) && count($ev)))
236                 return '';
237
238         $bd_format = t('l F d, Y \@ g:i A') ; // Friday January 18, 2011 @ 8 AM
239
240         $o = 'Friendica event notification:' . "\n";
241
242         $o .= '**' . bb2diaspora($ev['desc']) .  '**' . "\n";
243
244         $o .= t('Starts:') . ' ' . '['
245                 . (($ev['adjust']) ? day_translate(datetime_convert('UTC', 'UTC', 
246                         $ev['start'] , $bd_format ))
247                         :  day_translate(datetime_convert('UTC', 'UTC', 
248                         $ev['start'] , $bd_format)))
249                 .  '](' . $a->get_baseurl() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['start'])) . ")\n";
250
251         if(! $ev['nofinish'])
252                 $o .= t('Finishes:') . ' ' . '[' 
253                         . (($ev['adjust']) ? day_translate(datetime_convert('UTC', 'UTC', 
254                                 $ev['finish'] , $bd_format ))
255                                 :  day_translate(datetime_convert('UTC', 'UTC', 
256                                 $ev['finish'] , $bd_format )))
257                         . '](' . $a->get_baseurl() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['finish'])) . ")\n";
258
259         if(strlen($ev['location']))
260                 $o .= t('Location:') . bb2diaspora($ev['location']) 
261                         . "\n";
262
263         $o .= "\n";
264         return $o;
265 }