article.inc.php

   1 <?php
   2 class ArchiveArticle
   3 {
   4         public $raw, $title, $body; # file contents
   5         public $meta = [];  # head metadata properties
   6         public $place = []; # template variables replaced in render()
   7
   8         function __construct($path)
   9         {
  10                 $this->file = preg_replace('{^\.(?:/|$)}', '', $path);
  11                 $this->link = preg_replace('{(?:(?:/|^)index)?\.html$}', '', $this->file);
  12                 $this->raw($this->file);
  13         }
  14
  15         function raw($page)
  16         {
  17                 if (!file_exists($page)) {
  18                         return;
  19                 }
  20                 $this->raw = file_get_contents($page);
  21
  22                 if (preg_match_all('{
  23                         \G <meta \s+ property="( [^"]+ )" \s+ content="( [^"]* )" > \s*
  24                 }x', $this->raw, $meta)) {
  25                         $matchlen = array_sum(array_map('strlen', $meta[0]));
  26                         $this->raw = substr($this->raw, $matchlen); # delete matched contents
  27                         $this->meta = array_combine($meta[1], $meta[2]); # [property => content]
  28                 }
  29
  30                 // find significant contents
  31                 $this->body = preg_replace('{<aside\b.*?</aside>}s', '', $this->raw);
  32                 if (preg_match('{<h2>(.*?)</h2>\s*(.*)}s', $this->body, $titlematch)) {
  33                         list (, $this->title, $this->body) = $titlematch;
  34                 }
  35
  36                 return $this->raw;
  37         }
  38
  39         function __get($col)
  40         {
  41                 return $this->$col = $this->$col();  # run method and cache
  42         }
  43
  44         function handler()
  45         {
  46                 $path = $this->link;
  47                 $this->path = '';
  48                 $this->restricted = FALSE;
  49                 while (TRUE) {
  50                         if (file_exists("$path/.private")) {
  51                                 $this->restricted = $path;
  52                         }
  53
  54                         if (file_exists("$path/index.php")) {
  55                                 return $path;
  56                         }
  57
  58                         $up = strrpos($path, '/');
  59                         $this->path = substr($path, $up) . $this->path;
  60                         $path = substr($path, 0, $up);
  61                         if ($up === FALSE) {
  62                                 break;
  63                         }
  64                 }
  65                 return;
  66         }
  67
  68         function index()
  69         {
  70                 $this->handler;
  71                 if (empty($this->handler)) {
  72                         return;
  73                 }
  74                 $User = NULL;
  75                 $Page = $this;
  76                 $res = include "./{$this->handler}/index.php";
  77                 return $res;
  78         }
  79
  80         function restricted()
  81         {
  82                 $this->handler;
  83                 return $this->restricted;
  84         }
  85
  86         function safetitle()
  87         {
  88                 return trim($this->meta['og:title'] ?? strip_tags($this->title));
  89         }
  90         function name()
  91         {
  92                 return $this->safetitle ?: htmlspecialchars($this->link);
  93         }
  94
  95         function last()
  96         {
  97                 return filemtime($this->file);
  98         }
  99         function lastiso()
 100         {
 101                 return date(DATE_ATOM, $this->last);
 102         }
 103
 104         function dateparts()
 105         {
 106                 preg_match('< / (\d{4}) [/-] (\d{2}) (?:- (\d{2}) )? - >x', $this->file, $ymd);
 107                 array_shift($ymd);
 108                 return $ymd;
 109         }
 110         function dateiso()
 111         {
 112                 return implode('-', $this->dateparts()) . 'T12:00:00+02:00';
 113         }
 114
 115         function story()
 116         {
 117                 if ( preg_match('{
 118                         (?: < (?: p | figure [^>]* ) >\s* )+ (<img\ [^>]*>) | \n <hr\ />
 119                 }x', $this->body, $img, PREG_OFFSET_CAPTURE) ) {
 120                         # strip part after matching divider (image)
 121                         if (isset($img[1])) {
 122                                 $this->img = $img[1][0];
 123                         }
 124                         return substr($this->body, 0, $img[0][1]);
 125                 }
 126                 return $this->body;
 127         }
 128
 129         function teaser()
 130         {
 131                 if ($override = @$this->meta['og:description']) {
 132                         # prefer specific page description if found in metadata
 133                         return $override;
 134                 }
 135
 136                 # paragraph contents following the page header if any
 137                 if (preg_match('{
 138                         \G (?> \s+ | <div [^>]*> | \[\[[^]]*\]\] )* <p> \s* (.*?) </p>
 139                 }sx', $this->body, $bodyp, 0)) {
 140                         return $bodyp[1];
 141                 }
 142         }
 143
 144         function img()
 145         {
 146                 $this->img = NULL;
 147                 $this->story;
 148                 return $this->img;
 149         }
 150         function image()
 151         {
 152                 if ($override = @$this->meta['og:image']) {
 153                         # prefer specific page image if found in metadata
 154                         return $override;
 155                 }
 156
 157                 if ( preg_match('/\bsrc="([^"]*)"/', $this->img, $src) ) {
 158                         return $src[1];
 159                 }
 160         }
 161         function thumb($size = '300x')
 162         {
 163                 if (!$this->image or $this->image[0] !== '/') return;
 164                 if (preg_match('{^/thumb/\D}', $this->image)) {
 165                         return ltrim($this->image, '/');
 166                 }
 167                 return preg_replace(
 168                         ['{^(?:/thumb/[^/]*)?}', '/\.groot(?=\.\w+$)/', '/(?:\.jpg)?$/'],
 169                         [      "thumb/$size",    '',                         '.jpg'    ],
 170                         $this->image, 1
 171                 );
 172         }
 173
 174         function widget($name, $params = [])
 175         {
 176                 $path = stream_resolve_include_path("widget/$name.php");
 177                 if (!file_exists($path)) {
 178                         return '<strong class="warn"><em>'.$name.'</em> ontbreekt</strong>';
 179                 }
 180
 181                 ob_start();
 182                 $Page = clone $this;
 183                 if (is_array($params)) {
 184                         $Page->place += $params;
 185                 }
 186                 else {
 187                         foreach (explode(' ', $params) as $param) {
 188                                 if ($set = strpos($param, '=')) {
 189                                         $Page->place[ substr($param, 0, $set) ] = substr($param, $set + 1);
 190                                 }
 191                                 elseif (!empty($param)) {
 192                                         $Page->place[] = $param;
 193                                 }
 194                         }
 195                 }
 196
 197                 try {
 198                         include "widget/$name.php";
 199                         return ob_get_clean();
 200                 }
 201                 catch (Exception $e) {
 202                         return sprintf('<strong class="warn">%s</strong>',
 203                                 "fout in <em>$name</em>: {$e->getMessage()}"
 204                         );
 205                 }
 206         }
 207
 208         function render()
 209         {
 210                 $doc = $this->raw;
 211
 212                 if (!empty($this->place['warn'])) {
 213                         $warn = '<p class="warn">[[warn]]</p>';
 214                         if ($offset = strpos($doc, '</h2>')) {
 215                                 $doc = substr_replace($doc, "\n\n".$warn, $offset + 5, 0);
 216                         }
 217                         else {
 218                                 $doc = $warn . "\n\n" . $doc;
 219                         }
 220                 }
 221
 222                 # keep either login or logout parts depending on user level
 223                 global $User;
 224                 $userexists = $User && property_exists($User, 'login') && $User->login;
 225                 if (! ($userexists and $User->admin("edit {$this->link}")) ) {
 226                         # remove matching elements until first corresponding closing tag
 227                         $hideclass = $userexists ? 'logout' : 'login';
 228                         $tagmatch = '<([a-z]+) class="'.$hideclass.'"[^>]*>';
 229                         $doc = preg_replace("{\s*{$tagmatch}.*?</\\1>}s", '', $doc);
 230                 }
 231
 232                 return preg_replace_callback(
 233                         '{ \[\[ ([^] ]+) ([^]]*) \]\] }x',
 234                         function ($sub) {
 235                                 list ($placeholder, $name, $params) = $sub;
 236                                 $html = $this->place[$name] ??
 237                                         $this->widget($name, $params);
 238                                 if (empty($html) or $html[0] != '<') {
 239                                         $html = "<span>$html</span>";
 240                                 }
 241                                 $attr = sprintf(' data-dyn="%s"', is_numeric($name) ? '' : $name.$params);
 242                                 # contents with identifier in first tag
 243                                 return preg_replace( '/(?=>)/', $attr, $html, 1);
 244                         },
 245                         $doc
 246                 );
 247         }
 248 }
 249
 250 class PageSearch
 251 {
 252         public $handlers = [];
 253
 254         function __construct($path = '.')
 255         {
 256                 $this->iterator = new RecursiveCallbackFilterIterator(
 257                         new RecursiveDirectoryIterator($path),
 258                         function ($current) {
 259                                 if ($current->getFilename()[0] === '.') {
 260                                         # skip hidden files and directories
 261                                         return FALSE;
 262                                 }
 263                                 if (file_exists($current->getFilename() . '/index.php')) {
 264                                         # contents better provided by handler code
 265                                         $this->handlers[ $current->getPathname() ] = $current;
 266                                         return FALSE;
 267                                 }
 268                                 if ($current->isLink()) {
 269                                         # ignore symlinks, original contents only
 270                                         return FALSE;
 271                                 }
 272                                 if ($current->isDir()) {
 273                                         # traverse subdirectories unless untracked in any amount
 274                                         return !file_exists("$current/.gitignore");
 275                                 }
 276                                 # match **/*.html
 277                                 return preg_match('/(?<!\.inc)\.html$/', $current->getFilename());
 278                         }
 279                 );
 280         }
 281
 282         function files()
 283         {
 284                 # order alphabetically by link
 285                 $dir = [];
 286                 foreach (new RecursiveIteratorIterator($this->iterator) as $name) {
 287                         $article = new ArchiveArticle($name);
 288                         $dir[$article->link] = $article;
 289                 }
 290                 ksort($dir);
 291                 return $dir;
 292         }
 293 }