ewiki.php

很棒的在线教学系统

function ewiki_page_info($id, &$data, $action) {

   global $ewiki_plugins, $ewiki_config, $ewiki_links;
   global $CFG, $course;  // MOODLE HACK

   $o = ewiki_make_title($id, ewiki_t("INFOABOUTPAGE")." '{$id}'", 2, $action,"", "_MAY_SPLIT=1"); 

   $flagnames = array(
      "TEXT", "BIN", "DISABLED", "HTML", "READONLY", "WRITEABLE",
      "APPENDONLY", "SYSTEM",
   );
   $show = array(
      "version", "author", "userid", "created",
      "lastmodified", "refs",
      "flags", "meta", "content"
   );

   #-- versions to show
   $v_start = $data["version"];
   if ( ($uu=@$_REQUEST[EWIKI_UP_PAGENUM]) && ($uu<=$v_start) ) {
      $v_start = $uu;
   }
   $v_end = $v_start - $ewiki_config["list_limit"] + 1;
   if ( ($uu=@$_REQUEST[EWIKI_UP_PAGEEND]) && ($uu<=$v_start) ) {
      $v_end = $uu;
   }
   $v_end = max($v_end, 1);

   #-- go
   # the very ($first) entry is rendered more verbosely than the others
   for ($v=$v_start,$first=1; ($v>=$v_end); $v--,$first=0) {

      $current = ewiki_database("GET", array("id"=>$id, "version"=>$v));

      if (!strlen(trim($current["id"])) || !$current["version"] || !strlen(trim($current["content"]))) {
         continue;
      }

      $o .= '<table  class="version-info" cellpadding="2" cellspacing="1">' . "\n";

      #-- additional info-actions
      $commands = '';
      foreach ($ewiki_config["action_links"]["info"] as $thisaction=>$title)
      if (@$ewiki_plugins["action"][$thisaction] || @$ewiki_plugins["action_always"][$thisaction]) {
   ##### BEGIN MOODLE ADDITION #####
         if ($commands) {
             $commands .= '&nbsp;&nbsp;';
         }
         $commands .= '<a href="' .
           ewiki_script($thisaction, $id, array("version"=>$current["version"])) .
           '">' . get_string($title,"wiki") . '</a>';
   ##### END MOODLE ADDITION #####
      }

      #-- print page database entry
      foreach($show as $i) {

         $value = @$current[$i];

         #-- show database {fields} differently
         if ($i == "meta") {
            continue;  // MOODLE DOESN'T USE IT
            $str = "";
            if ($first && $value) { foreach ($value as $n=>$d) {
               $str .= s("$n: $d") . "<br />\n";
            } }
            $value = $str;
         }
         elseif ($value >= UNIX_MILLENNIUM) {    #-- {lastmodified}, {created}
            #### BEGIN MOODLE CHANGE
            $value=userdate($value);
            #$value = strftime("%c", $value);
            #### END MOODLE CHANGE
         }
         elseif ($i == "content") {
            continue;  // MOODLE DOESN'T CARE
            $value = strlen(trim($value)) . " bytes";
            $i = "content size";
         }
         elseif ($first && ($i == "refs") && !(EWIKI_PROTECTED_MODE && (EWIKI_PROTECTED_MODE_HIDING>=2))) {
            $a = explode("\n", trim($value));
            $ewiki_links = ewiki_database("FIND", $a);
            ewiki_merge_links($ewiki_links);
            foreach ($a as $n=>$link) {
               $a[$n] = ewiki_link_regex_callback(array("$link"), "force_noimg");
            }
            $value = trim(implode(", ", $a));
            if (!$value) {
                continue;
            }
         }
         elseif (strpos($value, "\n") !== false) {       #-- also for {refs}
            $value = str_replace("\n", ", ", trim($value));
            if (!$value) {
                continue;
            }
         }
         elseif ($i == "version") {
            $value = '<a href="' .
               ewiki_script("", $id, array("version"=>$value)) . '">' .
               $value . '</a> '."($commands)";
         }
         elseif ($i == "flags") {
            continue;  // MOODLE DOESN'T USE IT
            $fstr = "";
            for ($n = 0; $n < 32; $n++) {
              if ($value & (1 << $n)) {
                 if (! ($s=$flagnames[$n])) { $s = "UU$n"; }
                 $fstr .= $s . " ";
              }
            }
            $value = $fstr;
         }
         elseif ($i == "author") {
            continue;
            $ewiki_links=1;
            $value = preg_replace_callback("/((\w+:)?([".EWIKI_CHARS_U."]+[".EWIKI_CHARS_L."]+){2,}[\w\d]*)/", "ewiki_link_regex_callback", $value);
         }
         elseif ($i == "userid") {
             $i = 'author';
             if ($user = get_record('user', 'id', $value)) {
                 if (!isset($course->id)) {
                     $course->id = 1;
                 }
                 $picture = print_user_picture($user->id, $course->id, $user->picture, false, true, true);
                 $value = $picture." <a href=\"$CFG->wwwroot/user/view.php?id=$user->id&amp;course=$course->id\">".fullname($user)."</a>";
             } else {
                 continue;
                 //$value = @$current['author'];
             }
         }

   ##### BEGIN MOODLE ADDITION #####
         $o .= '<tr class="page-'.$i.'"><td style="vertical-align:top;text-align:right;white-space: nowrap;"><b>' .ewiki_t($i). ':</b></td>' .
               '<td>' . $value . "</td></tr>\n";
   ##### END MOODLE ADDITION #####

      }

      $o .= "</table><br /><br />\n";

   }

   #-- page result split
   if ($v >= 1) {
      $o .= "<br />\n".get_string('showversions','wiki').' '.ewiki_chunked_page($action, $id, -1, $v, 1, 0, 0) . "\n <br />";
   }

   return($o);
}




function ewiki_chunked_page($action, $id, $dir=-1, $start=10, $end=1, $limit=0, $overlap=0.25, $collapse_last=0.67) {

   global $ewiki_config;

   if (empty($limit)) {
      $limit = $ewiki_config["list_limit"];
   }
   if ($overlap < 1) {
      $overlap = (int) ($limit * $overlap);
   }

   $p = "";
   $n = $start;

   while ($n) {

      $n -= $dir * $overlap;

      $e = $n + $dir * ($limit + $overlap) + 1;

      if ($dir<0) {
         $e = max(1, $e);
         if ($e <= $collapse_last * $limit) {
            $e = 1;
         }
      }
      else {
         $e = min($end, $e);
         if ($e >= $collapse_last * $limit) {
            $e = $end;
         }
      }

      $o .= ($o?" &middot; ":"")
         . '<a href="'.ewiki_script($action, $id, array(EWIKI_UP_PAGENUM=>$n, EWIKI_UP_PAGEEND=>$e))
         . '">'. "$n-$e" . '</a>';

      if (($n=$e-1) < $end) {
         $n = false;
      }
   }

   return('<span class="chunked-result">'. $o .'</span>');
}






function ewiki_page_edit($id, $data, $action) {

   global $ewiki_links, $ewiki_author, $ewiki_plugins, $ewiki_ring, $ewiki_errmsg;

   $hidden_postdata = array();

   #-- previous version come back
   if (@$data["forced_version"]) {

      $current = ewiki_database("GET", array("id"=>$id));
      $data["version"] = $current["version"];
      unset($current);

      unset($_REQUEST["content"]);
      unset($_REQUEST["version"]);
   }

   #-- edit hacks
   if ($pf_a = @$ewiki_plugins["edit_hook"]) foreach ($pf_a as $pf) {
      if ($output = $pf($id, $data, $hidden_postdata)) {
         return($output);
      }
   }

   #-- permission checks
   if (isset($ewiki_ring)) {
      $ring = $ewiki_ring;
   } else { 
      $ring = 3;
   }
   $flags = @$data["flags"];
   if (!($flags & EWIKI_DB_F_WRITEABLE)) {

      #-- perform auth
      $edit_ring = (EWIKI_PROTECTED_MODE>=2) ? (2) : (NULL);
      if (EWIKI_PROTECTED_MODE && !ewiki_auth($id, $data, $action, $edit_ring, "FORCE")) {
         return($ewiki_errmsg);
      }

      #-- flag checking
      if (($flags & EWIKI_DB_F_READONLY) and ($ring >= 2)) {
         return(ewiki_t("CANNOTCHANGEPAGE"));
      }
      if (($flags) and (($flags & EWIKI_DB_F_TYPE) != EWIKI_DB_F_TEXT) and ($ring >= 1)) {
         return(ewiki_t("CANNOTCHANGEPAGE"));
      }
   }

   #-- "Edit Me"
   $o = ewiki_make_title($id, ewiki_t("EDITTHISPAGE").(" '{$id}'"), 2, $action, "", "_MAY_SPLIT=1");

   #-- preview
   if (isset($_REQUEST["preview"])) {
      $o .= $ewiki_plugins["edit_preview"][0]($data);
   }

   #-- save
   if (isset($_REQUEST["save"])) {


         #-- normalize to UNIX newlines
         $_REQUEST["content"] = str_replace("\015\012", "\012", $_REQUEST["content"]);
         $_REQUEST["content"] = str_replace("\015", "\012", $_REQUEST["content"]);

         #-- check for concurrent version saving
         $error = 0;
         if ((@$data["version"] >= 1) && ($data["version"] != @$_REQUEST["version"]) || (@$_REQUEST["version"] < 1)) {

            $pf = $ewiki_plugins["edit_patch"][0];

            if (!$pf || !$pf($id, $data)) {
               $error = 1;
               $o .= ewiki_t("ERRVERSIONSAVE") . "<br /><br />";
            }

         }
         if (!$error) {

            #-- new pages` flags
            if (! ($set_flags = @$data["flags"] & EWIKI_DB_F_COPYMASK)) {
               $set_flags = 1;
            }
            if (EWIKI_ALLOW_HTML) {
               $set_flags |= EWIKI_DB_F_HTML;
            }

            #-- mk db entry
            $save = array(
               "id" => $id,
               "version" => @$data["version"] + 1,
               "flags" => $set_flags,
               "content" => $_REQUEST["content"],
               "created" => ($uu=@$data["created"]) ? $uu : time(),
               "meta" => ($uu=@$data["meta"]) ? $uu : "",
               "hits" => ($uu=@$data["hits"]) ? $uu : "0",
            );
            ewiki_data_update($save);

            #-- edit storage hooks
            if ($pf_a = @$ewiki_plugins["edit_save"]) {
               foreach ($pf_a as $pf) {
                  $pf($save, $data);
               }
            }

            #-- save
            if (!$save || !ewiki_database("WRITE", $save)) {

               $o .= $ewiki_errmsg ? $ewiki_errmsg : ewiki_t("ERRORSAVING");

            }
            else {
               #-- prevent double saving, when ewiki_page() is re-called
               $_REQUEST = $_GET = $_POST = array();

               $o = ewiki_t("THANKSFORCONTRIBUTION") . "<br /><br />";
               $o .= ewiki_page($id);

               if (EWIKI_EDIT_REDIRECT) {
                  $url = ewiki_script("", $id, "thankyou=1", 0, 0, EWIKI_HTTP_HEADERS?ewiki_script_url():0);
                 
                  if (EWIKI_HTTP_HEADERS && !headers_sent()) {
                     header("Status: 303 Redirect for GET");
                     header("Location: $url");
                     #header("URI: $url");
                     #header("Refresh: 0; URL=$url");
                  }
                  else {
                     $o .= '<meta http-equiv="Refresh" content="0; URL='.s($url).'">';
                  }
               }

            }

         }

         //@REWORK
         // header("Reload-Location: " . ewiki_script("", $id, "", 0, 0, ewiki_script_url()) );

   }
   else {
      #-- Edit <form>
      $o .= ewiki_page_edit_form($id, $data, $hidden_postdata);

      #-- additional forms
      if ($pf_a = $ewiki_plugins["edit_form_final"]) foreach ($pf_a as $pf) {
         $pf($o, $id, $data, $action);
      }
   }

   return($o);
}


function ewiki_data_update(&$data, $author="") {
   global $USER, $ewiki_links;

   #-- add backlinks entry
   ewiki_scan_wikiwords($data["content"], $ewiki_links, "_STRIP_EMAIL=1");
   $data["refs"] = "\n\n".implode("\n", array_keys($ewiki_links))."\n\n";
   $data["lastmodified"] = time();
   $data["author"] = ewiki_author($author);
   if (isset($USER->id)) {
       $data["userid"] = $USER->id;
   }
}



#-- edit <textarea>
function ewiki_page_edit_form(&$id, &$data, &$hidden_postdata) {
   global $ewiki_plugins, $ewiki_config, $moodle_format;   

   $o='';
      
   #-- previously edited, or db fetched content
   if (@$_REQUEST["content"] || @$_REQUEST["version"]) {