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   1  <?php
   2  
   3  namespace dokuwiki;
   4  
   5  /**
   6   * Class Draft
   7   *
   8   * @package dokuwiki
   9   */
  10  class Draft
  11  {
  12  
  13      protected $errors = [];
  14      protected $cname;
  15      protected $id;
  16      protected $client;
  17  
  18      /**
  19       * Draft constructor.
  20       *
  21       * @param string $ID the page id for this draft
  22       * @param string $client the client identification (username or ip or similar) for this draft
  23       */
  24      public function __construct($ID, $client)
  25      {
  26          $this->id = $ID;
  27          $this->client = $client;
  28          $this->cname = getCacheName("$client\n$ID", '.draft');
  29          if(file_exists($this->cname) && file_exists(wikiFN($ID))) {
  30              if (filemtime($this->cname) < filemtime(wikiFN($ID))) {
  31                  // remove stale draft
  32                  $this->deleteDraft();
  33              }
  34          }
  35      }
  36  
  37      /**
  38       * Get the filename for this draft (whether or not it exists)
  39       *
  40       * @return string
  41       */
  42      public function getDraftFilename()
  43      {
  44          return $this->cname;
  45      }
  46  
  47      /**
  48       * Checks if this draft exists on the filesystem
  49       *
  50       * @return bool
  51       */
  52      public function isDraftAvailable()
  53      {
  54          return file_exists($this->cname);
  55      }
  56  
  57      /**
  58       * Save a draft of a current edit session
  59       *
  60       * The draft will not be saved if
  61       *   - drafts are deactivated in the config
  62       *   - or the editarea is empty and there are no event handlers registered
  63       *   - or the event is prevented
  64       *
  65       * @triggers DRAFT_SAVE
  66       *
  67       * @return bool whether has the draft been saved
  68       */
  69      public function saveDraft()
  70      {
  71          global $INPUT, $INFO, $EVENT_HANDLER, $conf;
  72          if (!$conf['usedraft']) {
  73              return false;
  74          }
  75          if (!$INPUT->post->has('wikitext') &&
  76              !$EVENT_HANDLER->hasHandlerForEvent('DRAFT_SAVE')) {
  77              return false;
  78          }
  79          $draft = [
  80              'id' => $this->id,
  81              'prefix' => substr($INPUT->post->str('prefix'), 0, -1),
  82              'text' => $INPUT->post->str('wikitext'),
  83              'suffix' => $INPUT->post->str('suffix'),
  84              'date' => $INPUT->post->int('date'),
  85              'client' => $this->client,
  86              'cname' => $this->cname,
  87              'errors' => [],
  88          ];
  89          $event = new Extension\Event('DRAFT_SAVE', $draft);
  90          if ($event->advise_before()) {
  91              $draft['hasBeenSaved'] = io_saveFile($draft['cname'], serialize($draft));
  92              if ($draft['hasBeenSaved']) {
  93                  $INFO['draft'] = $draft['cname'];
  94              }
  95          } else {
  96              $draft['hasBeenSaved'] = false;
  97          }
  98          $event->advise_after();
  99  
 100          $this->errors = $draft['errors'];
 101  
 102          return $draft['hasBeenSaved'];
 103      }
 104  
 105      /**
 106       * Get the text from the draft file
 107       *
 108       * @throws \RuntimeException if the draft file doesn't exist
 109       *
 110       * @return string
 111       */
 112      public function getDraftText()
 113      {
 114          if (!file_exists($this->cname)) {
 115              throw new \RuntimeException(
 116                  "Draft for page $this->id and user $this->client doesn't exist at $this->cname."
 117              );
 118          }
 119          $draft = unserialize(io_readFile($this->cname,false));
 120          return cleanText(con($draft['prefix'],$draft['text'],$draft['suffix'],true));
 121      }
 122  
 123      /**
 124       * Remove the draft from the filesystem
 125       *
 126       * Also sets $INFO['draft'] to null
 127       */
 128      public function deleteDraft()
 129      {
 130          global $INFO;
 131          @unlink($this->cname);
 132          $INFO['draft'] = null;
 133      }
 134  
 135      /**
 136       * Get a formatted message stating when the draft was saved
 137       *
 138       * @return string
 139       */
 140      public function getDraftMessage()
 141      {
 142          global $lang;
 143          return $lang['draftdate'] . ' ' . dformat(filemtime($this->cname));
 144      }
 145  
 146      /**
 147       * Retrieve the errors that occured when saving the draft
 148       *
 149       * @return array
 150       */
 151      public function getErrors()
 152      {
 153          return $this->errors;
 154      }
 155  
 156      /**
 157       * Get the timestamp when this draft was saved
 158       *
 159       * @return int
 160       */
 161      public function getDraftDate()
 162      {
 163          return filemtime($this->cname);
 164      }
 165  }