Add DokuWiki export

node/handler/ExportHandler.js

@@ -19,6 +19,7 @@
  */
 
 var exporthtml = require("../utils/ExportHtml");
+var exportdokuwiki = require("../utils/ExportDokuWiki");
 var padManager = require("../db/PadManager");
 var async = require("async");
 var fs = require("fs");
@@ -56,6 +57,26 @@ exports.doExport = function(req, res, padId, type)
       res.send(pad.text());
     });
   }
+  else if(type == 'dokuwiki')
+  {
+    var randNum;
+    var srcFile, destFile;
+
+    async.series([
+      //render the dokuwiki document
+      function(callback)
+      {
+        exportdokuwiki.getPadDokuWikiDocument(padId, null, function(err, dokuwiki)
+        {
+          res.send(dokuwiki);
+          callback("stop");
+        });
+      },
+    ], function(err)
+    {
+      if(err && err != "stop") throw err;
+    });
+  }
   else
   {
     var html;

node/server.js

@@ -237,7 +237,7 @@ async.waterfall([
         return;
       }
 
-      var types = ["pdf", "doc", "txt", "html", "odt"];
+      var types = ["pdf", "doc", "txt", "html", "odt", "dokuwiki"];
       //send a 404 if we don't support this filetype
       if(types.indexOf(req.params.type) == -1)
       {
@@ -246,7 +246,8 @@ async.waterfall([
       }
 
       //if abiword is disabled, and this is a format we only support with abiword, output a message
-      if(settings.abiword == null && req.params.type != "html" && req.params.type != "txt" )
+      if(settings.abiword == null &&
+         ["odt", "pdf", "doc"].indexOf(req.params.type) !== -1)
       {
         res.send("Abiword is not enabled at this Etherpad Lite instance. Set the path to Abiword in settings.json to enable this feature");
         return;

node/utils/ExportDokuWiki.js

@@ -0,0 +1,344 @@
+/**
+ * Copyright 2011 Adrian Lang
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var async = require("async");
+var Changeset = require("./Changeset");
+var padManager = require("../db/PadManager");
+
+function getPadDokuWiki(pad, revNum, callback)
+{
+  var atext = pad.atext;
+  var dokuwiki;
+  async.waterfall([
+  // fetch revision atext
+
+
+  function (callback)
+  {
+    if (revNum != undefined)
+    {
+      pad.getInternalRevisionAText(revNum, function (err, revisionAtext)
+      {
+        atext = revisionAtext;
+        callback(err);
+      });
+    }
+    else
+    {
+      callback(null);
+    }
+  },
+
+  // convert atext to dokuwiki text
+
+  function (callback)
+  {
+    dokuwiki = getDokuWikiFromAtext(pad, atext);
+    callback(null);
+  }],
+  // run final callback
+
+
+  function (err)
+  {
+    callback(err, dokuwiki);
+  });
+}
+
+function getDokuWikiFromAtext(pad, atext)
+{
+  var apool = pad.apool();
+  var textLines = atext.text.slice(0, -1).split('\n');
+  var attribLines = Changeset.splitAttributionLines(atext.attribs, atext.text);
+
+  var tags = ['======', '=====', '**', '//', '__', 'del>'];
+  var props = ['heading1', 'heading2', 'bold', 'italic', 'underline', 'strikethrough'];
+  var anumMap = {};
+
+  props.forEach(function (propName, i)
+  {
+    var propTrueNum = apool.putAttrib([propName, true], true);
+    if (propTrueNum >= 0)
+    {
+      anumMap[propTrueNum] = i;
+    }
+  });
+
+  function getLineDokuWiki(text, attribs)
+  {
+    var propVals = [false, false, false];
+    var ENTER = 1;
+    var STAY = 2;
+    var LEAVE = 0;
+
+    // Use order of tags (b/i/u) as order of nesting, for simplicity
+    // and decent nesting.  For example,
+    // <b>Just bold<b> <b><i>Bold and italics</i></b> <i>Just italics</i>
+    // becomes
+    // <b>Just bold <i>Bold and italics</i></b> <i>Just italics</i>
+    var taker = Changeset.stringIterator(text);
+    var assem = Changeset.stringAssembler();
+
+    function emitOpenTag(i)
+    {
+      if (tags[i].indexOf('>') !== -1) {
+        assem.append('<');
+      }
+      assem.append(tags[i]);
+    }
+
+    function emitCloseTag(i)
+    {
+      if (tags[i].indexOf('>') !== -1) {
+        assem.append('</');
+      }
+      assem.append(tags[i]);
+    }
+
+    var urls = _findURLs(text);
+
+    var idx = 0;
+
+    function processNextChars(numChars)
+    {
+      if (numChars <= 0)
+      {
+        return;
+      }
+
+      var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + numChars));
+      idx += numChars;
+
+      while (iter.hasNext())
+      {
+        var o = iter.next();
+        var propChanged = false;
+        Changeset.eachAttribNumber(o.attribs, function (a)
+        {
+          if (a in anumMap)
+          {
+            var i = anumMap[a]; // i = 0 => bold, etc.
+            if (!propVals[i])
+            {
+              propVals[i] = ENTER;
+              propChanged = true;
+            }
+            else
+            {
+              propVals[i] = STAY;
+            }
+          }
+        });
+        for (var i = 0; i < propVals.length; i++)
+        {
+          if (propVals[i] === true)
+          {
+            propVals[i] = LEAVE;
+            propChanged = true;
+          }
+          else if (propVals[i] === STAY)
+          {
+            propVals[i] = true; // set it back
+          }
+        }
+        // now each member of propVal is in {false,LEAVE,ENTER,true}
+        // according to what happens at start of span
+        if (propChanged)
+        {
+          // leaving bold (e.g.) also leaves italics, etc.
+          var left = false;
+          for (var i = 0; i < propVals.length; i++)
+          {
+            var v = propVals[i];
+            if (!left)
+            {
+              if (v === LEAVE)
+              {
+                left = true;
+              }
+            }
+            else
+            {
+              if (v === true)
+              {
+                propVals[i] = STAY; // tag will be closed and re-opened
+              }
+            }
+          }
+
+          for (var i = propVals.length - 1; i >= 0; i--)
+          {
+            if (propVals[i] === LEAVE)
+            {
+              emitCloseTag(i);
+              propVals[i] = false;
+            }
+            else if (propVals[i] === STAY)
+            {
+              emitCloseTag(i);
+            }
+          }
+          for (var i = 0; i < propVals.length; i++)
+          {
+            if (propVals[i] === ENTER || propVals[i] === STAY)
+            {
+              emitOpenTag(i);
+              propVals[i] = true;
+            }
+          }
+          // propVals is now all {true,false} again
+        } // end if (propChanged)
+        var chars = o.chars;
+        if (o.lines)
+        {
+          chars--; // exclude newline at end of line, if present
+        }
+        var s = taker.take(chars);
+
+        assem.append(_escapeDokuWiki(s));
+      } // end iteration over spans in line
+      for (var i = propVals.length - 1; i >= 0; i--)
+      {
+        if (propVals[i])
+        {
+          emitCloseTag(i);
+          propVals[i] = false;
+        }
+      }
+    } // end processNextChars
+    if (urls)
+    {
+      urls.forEach(function (urlData)
+      {
+        var startIndex = urlData[0];
+        var url = urlData[1];
+        var urlLength = url.length;
+        processNextChars(startIndex - idx);
+        assem.append('[[');
+
+        // Do not use processNextChars since a link does not contain syntax and
+        // needs no escaping
+        var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + urlLength));
+        idx += urlLength;
+        assem.append(taker.take(iter.next().chars));
+
+        assem.append(']]');
+      });
+    }
+    processNextChars(text.length - idx);
+
+    return assem.toString() + "\n";
+  } // end getLineDokuWiki
+  var pieces = [];
+
+  for (var i = 0; i < textLines.length; i++)
+  {
+    var line = _analyzeLine(textLines[i], attribLines[i], apool);
+    var lineContent = getLineDokuWiki(line.text, line.aline);
+
+    if (line.listLevel && lineContent)
+    {
+      pieces.push(new Array(line.listLevel + 1).join('  ') + '* ');
+    }
+    pieces.push(lineContent);
+  }
+
+  return pieces.join('');
+}
+
+function _analyzeLine(text, aline, apool)
+{
+  var line = {};
+
+  // identify list
+  var lineMarker = 0;
+  line.listLevel = 0;
+  if (aline)
+  {
+    var opIter = Changeset.opIterator(aline);
+    if (opIter.hasNext())
+    {
+      var listType = Changeset.opAttributeValue(opIter.next(), 'list', apool);
+      if (listType)
+      {
+        lineMarker = 1;
+        listType = /([a-z]+)([12345678])/.exec(listType);
+        if (listType)
+        {
+          line.listTypeName = listType[1];
+          line.listLevel = Number(listType[2]);
+        }
+      }
+    }
+  }
+  if (lineMarker)
+  {
+    line.text = text.substring(1);
+    line.aline = Changeset.subattribution(aline, 1);
+  }
+  else
+  {
+    line.text = text;
+    line.aline = aline;
+  }
+
+  return line;
+}
+
+exports.getPadDokuWikiDocument = function (padId, revNum, callback)
+{
+  padManager.getPad(padId, function (err, pad)
+  {
+    if (err)
+    {
+      callback(err);
+      return;
+    }
+
+    getPadDokuWiki(pad, revNum, callback);
+  });
+}
+
+function _escapeDokuWiki(s)
+{
+  s = s.replace(/(\/\/|\*\*|__)/g, '%%$1%%');
+  return s;
+}
+
+// copied from ACE
+var _REGEX_WORDCHAR = /[\u0030-\u0039\u0041-\u005A\u0061-\u007A\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF\u0100-\u1FFF\u3040-\u9FFF\uF900-\uFDFF\uFE70-\uFEFE\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFDC]/;
+var _REGEX_SPACE = /\s/;
+var _REGEX_URLCHAR = new RegExp('(' + /[-:@a-zA-Z0-9_.,~%+\/\\?=&#;()$]/.source + '|' + _REGEX_WORDCHAR.source + ')');
+var _REGEX_URL = new RegExp(/(?:(?:https?|s?ftp|ftps|file|smb|afp|nfs|(x-)?man|gopher|txmt):\/\/|mailto:)/.source + _REGEX_URLCHAR.source + '*(?![:.,;])' + _REGEX_URLCHAR.source, 'g');
+
+// returns null if no URLs, or [[startIndex1, url1], [startIndex2, url2], ...]
+
+
+function _findURLs(text)
+{
+  _REGEX_URL.lastIndex = 0;
+  var urls = null;
+  var execResult;
+  while ((execResult = _REGEX_URL.exec(text)))
+  {
+    urls = (urls || []);
+    var startIndex = execResult.index;
+    var url = execResult[0];
+    urls.push([startIndex, url]);
+  }
+
+  return urls;
+}