com1.js

// Copyright 2013 Clark DuVall
//
// 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 COMMANDS = COMMANDS || {};

COMMANDS.cat =  function(argv, cb) {
   var filenames = this._terminal.parseArgs(argv).filenames,
       stdout;

   this._terminal.scroll();
   if (!filenames.length) {
      this._terminal.returnHandler = function() {
         stdout = this.stdout();
         if (!stdout)
            return;
         stdout.innerHTML += '<br>' + stdout.innerHTML + '<br>';
         this.scroll();
         this.newStdout();
      }.bind(this._terminal);
      return;
   }
   filenames.forEach(function(filename, i) {
      var entry = this._terminal.getEntry(filename);

      if (!entry)
         this._terminal.write('cat: ' + filename + ': No such file or directory');
      else if (entry.type === 'dir')
         this._terminal.write('cat: ' + filename + ': Is a directory.');
      else
         this._terminal.write(entry.contents);
      if (i !== filenames.length - 1)
         this._terminal.write('<br>');
   }, this);
   cb();
}

COMMANDS.cd = function(argv, cb) {
   var filename = this._terminal.parseArgs(argv).filenames[0],
       entry;

   if (!filename)
      filename = '~';
   entry = this._terminal.getEntry(filename);
   if (!entry)
      this._terminal.write('bash: cd: ' + filename + ': No such file or directory');
   else if (entry.type !== 'dir')
      this._terminal.write('bash: cd: ' + filename + ': Not a directory.');
   else
      this._terminal.cwd = entry;
   cb();
}

COMMANDS.ls = function(argv, cb) {
   var result = this._terminal.parseArgs(argv),
       args = result.args,
       filename = result.filenames[0],
       entry = filename ? this._terminal.getEntry(filename) : this._terminal.cwd,
       maxLen = 0,
       writeEntry;

   writeEntry = function(e, str) {
      this.writeLink(e, str);
      if (args.indexOf('l') > -1) {
         if ('description' in e)
            this.write(' - ' + e.description);
         this.write('<br>');
      } else {
         // Make all entries the same width like real ls. End with a normal
         // space so the line breaks only after entries.
         this.write(Array(maxLen - e.name.length + 2).join('&nbsp') + ' ');
      }
   }.bind(this._terminal);

   if (!entry)
      this._terminal.write('ls: cannot access ' + filename + ': No such file or directory');
   else if (entry.type === 'dir') {
      var dirStr = this._terminal.dirString(entry);
      maxLen = entry.contents.reduce(function(prev, cur) {
         return Math.max(prev, cur.name.length);
      }, 0);

      for (var i in entry.contents) {
         var e = entry.contents[i];
         if (args.indexOf('a') > -1 || e.name[0] !== '.')
            writeEntry(e, dirStr + '/' + e.name);
      }
   } else {
      maxLen = entry.name.length;
      writeEntry(entry, filename);
   }
   cb();
}

COMMANDS.gimp = function(argv, cb) {
   var filename = this._terminal.parseArgs(argv).filenames[0],
       entry,
       imgs;

   if (!filename) {
      this._terminal.write('gimp: please specify an image file.');
      cb();
      return;
   }

   entry = this._terminal.getEntry(filename);
   if (!entry || entry.type !== 'img') {
      this._terminal.write('gimp: file ' + filename + ' is not an image file.');
   } else {
      this._terminal.write('<img src="' + entry.contents + '"/>');
      imgs = this._terminal.div.getElementsByTagName('img');
      imgs[imgs.length - 1].onload = function() {
         this.scroll();
      }.bind(this._terminal);
      if ('caption' in entry)
         this._terminal.write('<br/>' + entry.caption);
   }
   cb();
}

COMMANDS.clear = function(argv, cb) {
   this._terminal.div.innerHTML = '';
   cb();
}

COMMANDS.sudo = function(argv, cb) {
   var count = 0;
   this._terminal.returnHandler = function() {
      if (++count < 3) {
         this.write('<br/>Sorry, try again.<br/>');
         this.write('[sudo] password for ' + this.config.username + ': ');
         this.scroll();
      } else {
         this.write('<br/>sudo: 3 incorrect password attempts');
         cb();
      }
   }.bind(this._terminal);
   this._terminal.write('[sudo] password for ' + this._terminal.config.username + ': ');
   this._terminal.scroll();
}

COMMANDS.login = function(argv, cb) {
   this._terminal.returnHandler = function() {
      var username = this.stdout().innerHTML;

      this.scroll();
      if (username)
         this.config.username = username;
      this.write('<br>Password: ');
      this.scroll();
      this.returnHandler = function() { cb(); }
   }.bind(this._terminal);
   this._terminal.write('Username: ');
   this._terminal.newStdout();
   this._terminal.scroll();
}

COMMANDS.tree = function(argv, cb) {
   var term = this._terminal,
       home;

   function writeTree(dir, level) {
      dir.contents.forEach(function(entry) {
         var str = '';

         if (entry.name.startswith('.'))
            return;
         for (var i = 0; i < level; i++)
            str += '|  ';
         str += '|&mdash;&mdash;';
         term.write(str);
         term.writeLink(entry, term.dirString(dir) + '/' + entry.name);
         term.write('<br>');
         if (entry.type === 'dir')
            writeTree(entry, level + 1);
      });
   };
   home = this._terminal.getEntry('~');
   this._terminal.writeLink(home, '~');
   this._terminal.write('<br>');
   writeTree(home, 0);
   cb();
}

COMMANDS.help = function(argv, cb) {
   this._terminal.write(
       'You can navigate either by clicking on anything that ' +
       '<a href="javascript:void(0)">underlines</a> when you put your mouse ' +
       'over it, or by typing commands in the terminal. Type the name of a ' +
       '<span class="exec">link</span> to view it. Use "cd" to change into a ' +
       '<span class="dir">directory</span>, or use "ls" to list the contents ' +
       'of that directory. The contents of a <span class="text">file</span> ' +
       'can be viewed using "cat". <span class="img">Images</span> are ' +
       'displayed using "gimp".<br><br>If there is a command you want to get ' +
       'out of, press Ctrl+C or Ctrl+D.<br><br>');
   this._terminal.write('Commands are:<br>');
   for (var c in this._terminal.commands) {
      if (this._terminal.commands.hasOwnProperty(c) && !c.startswith('_'))
         this._terminal.write(c + '  ');
   }
   cb();
}