QWiki/acts/default.js

var fs = require('fs');
module.exports = function(qwiki) {
  qwiki.rule('', '@@CONTENT@@', function(req, res, instance, next) {
    var area = req.area;
    if (area == '') {
      area = 'front';
    }
  
    // instance.pos, instance.offset, instance.indices
    var cache_path = 'cache/'+area+'.html';
    qwiki.readFile(res, cache_path, function(type, err) {
      if (type == 'FNF') {
        // cache does not exist - is there a wiki source?
        var wiki_path = 'wiki/'+area+'.qwk';
        fs.stat(wiki_path, function(err, stats) {
          // TODO: stats.isFile()
          if (err && err.code == 'ENOENT') {
            // the wiki entry does not exist
            res.write(area + ' does not exist yet');
            next();
          } else if (err) {
            // error while statting wiki entry
            res.write(area + ': ' + err.code);
            next();
          } else {
            // wiki entry exists!
            fs.readFile(wiki_path, function(err, data) {
              if (err) {
                res.write(area + ': ' + err.code);
                next();
              } else {
                qwiki.convertAndSave(area, (req.area in qwiki.wiki_index.pages ? qwiki.wiki_index.pages[req.area].format : qwiki.getDefault('format')), data, function() {
                  qwiki.readFile(res, wiki_path, function(type, err) {
                    if (type == 'FNF') {
                      res.write('error while creating cache');
                      next();
                    } else if (err) {
                      res.write(area + ': ' + err.code);
                      next();
                    } else {
                      next();
                    }
                  });
                });
              }
            });
          }
        });
      } else if (err) {
        res.write(area + ': ' + err.code);
        next();
      } else {
        next();
      }
    });
  });
  qwiki.rule('', '@@TITLE@@', function(req, res, instance, next) {
    res.write('qwiki ' + req.area);
    next();
  });
  qwiki.rule('', '@@PAGE@@', function(req, res, instance, next) {
    res.write(req.area);
    next();
  });
  qwiki.rule('', '@@CONTROLS@@', function(req, res, instance, next) {
    res.write('<li><a href="'+req.area+'/edit"><img src="/edit.png">Edit</a></li><li><a href="'+req.area+'/new"><img src="/new.png">New Page</a></li><li><a href="'+req.area+'/upload"><img src="/upload.png">Upload</a></li><li><a href="./index"><img src="/file_dir.png">Index</a></li>');
    next();
  });
  qwiki.rule('', '@@CRUMBS@@', function(req, res, instance, next) {
    var parts = req.area.split('/');
    var path = '';
    parts[0] = '>';
    for (var i = 0; i < parts.length; i++) {
      path += (i == 0 ? '/' : parts[i]);
      res.write('<li><a href="'+path+'">'+parts[i]+'</a></li>');
      path += (i == 0 ? '' : '/');
    }
    next();
  });
  qwiki.rule('', '@@FOOTER@@', function(req, res, instance, next) {
    res.write('<a href="http://kettek.net/qwiki">QWiki</a> Copyright 2016 <a href="http://kettek.net">kts of kettek</a>');
    next();
  });
  qwiki.act('', function(req, res) {
    var ext = qwiki.getExt(req.area);
    var mimetype = qwiki.getMIMEtype(qwiki.getExt(req.area));
    if (mimetype == '') mimetype = 'application/octet-stream';
    if (ext != '') { // write file on disk directly
      var path = 'wiki/'+req.area;
      fs.stat(path, function(err, stat) {
        if (err == null) {
          // TODO: etags should actually be based on binary data(CRC32, etc.), not last modified
          // TODO: files should not be stat()`d each call, but should be cached and updated when the file updates (how? browser-based upload interface?)
          var mtime = stat.mtime.getTime();
          if (!(path in qwiki.etags) || qwiki.etags[path] != mtime) {
            qwiki.etags[path] = mtime;
          }
          if ('if-none-match' in req.headers && req.headers['if-none-match'] == qwiki.etags[path]) {
            res.writeHead(304, "Not Modified");
            res.end();
          } else {
            res.writeHead(200, "OK", {
              "Content-Type": mimetype,
              "Content-Length": stat.size,
              "ETag": mtime
            });
            var rs = fs.createReadStream(path);
            rs.on('data', function(chunk) {
              res.write(chunk);
            });
            rs.on('end', function() {
              res.end();
            });
          }
        } else if (err.code == 'ENOENT') {
          res.writeHead(404);
          res.end();
        } else {
          console.log(err);
          res.write(err.message);
          res.end();
        }
      });
    } else { // no mimetype/ext, it must be a wiki entry
      res.writeHead(200, "OK", {
        "Content-Type": "text/html",
      });
      qwiki.parsePage('', '', req, res);
    }
  });
};