[Sommaire] [Imprimer]

   1  <?php
   2  
   3  /*
   4   *  $Id: DefaultInputHandler.php 3076 2006-12-18 08:52:12Z fabien $
   5   *
   6   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   7   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   8   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   9   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  10   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  11   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  12   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  13   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  14   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  15   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  16   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  17   *
  18   * This software consists of voluntary contributions made by many individuals
  19   * and is licensed under the LGPL. For more information please see
  20   * <http://phing.info>.
  21   */
  22   
  23  require_once 'phing/input/InputHandler.php';
  24  include_once 'phing/system/io/ConsoleReader.php';
  25  
  26  /**
  27   * Prompts using print(); reads input from Console.
  28   *
  29   * @author Hans Lellelid <hans@xmpl.org> (Phing)
  30   * @author Stefan Bodewig <stefan.bodewig@epost.de> (Ant)
  31   * @version $Revision: 1.6 $
  32   * @package phing.input
  33   */
  34  class DefaultInputHandler implements InputHandler {
  35      
  36      /**
  37       * Prompts and requests input.  May loop until a valid input has
  38       * been entered.
  39       * @throws BuildException 
  40       */
  41      public function handleInput(InputRequest $request) {
  42          $prompt = $this->getPrompt($request);
  43          $in = new ConsoleReader();           
  44          do {
  45              print $prompt;
  46              try {
  47                  $input = $in->readLine();
  48                  if ($input === "" && ($request->getDefaultValue() !== null) ) {
  49                      $input = $request->getDefaultValue();
  50                  }
  51                  $request->setInput($input);
  52              } catch (Exception $e) {
  53                  throw new BuildException("Failed to read input from Console.", $e);
  54              }
  55          } while (!$request->isInputValid());
  56      }
  57  
  58      /**
  59       * Constructs user prompt from a request.
  60       *
  61       * <p>This implementation adds (choice1,choice2,choice3,...) to the
  62       * prompt for <code>MultipleChoiceInputRequest</code>s.</p>
  63       *
  64       * @param $request the request to construct the prompt for.
  65       *                Must not be <code>null</code>.
  66       */
  67      protected function getPrompt(InputRequest $request) {
  68          $prompt = $request->getPrompt();
  69          
  70          // use is_a() to avoid needing the class to be loaded
  71          if (is_a($request, 'YesNoInputRequest')) { // (yes/no)
  72              $prompt .= '(' . implode('/', $request->getChoices()) .')';
  73          } elseif (is_a($request, 'MultipleChoiceInputRequest')) { // (a,b,c,d)
  74              $prompt .= '(' . implode(',', $request->getChoices()) . ')';            
  75          }
  76          if ($request->getDefaultValue() !== null) {
  77              $prompt .= ' ['.$request->getDefaultValue().']';
  78          }
  79          $pchar = $request->getPromptChar();        
  80          return $prompt . ($pchar ? $pchar . ' ' : ' ');
  81      } 
  82  }