<?php
// $Id$

/**
 * Administrative interface to imagecache.
 *
 */

function imagecache_ui_help($section) {
  switch ($section) {
    case 'admin/build/imagecache': return t('Manage imagecache preset.');
  }
}

function imagecache_ui_menu($may_cache) {
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/build/imagecache',
      'title' => t('Imagecache'),
      'description' => t('Administer imagecache presets and actions.'),
      'callback' => 'imagecache_ui_presets',
      'access' => user_access('administer imagecache'),

    );
    $items[] = array(
      'path' => 'admin/build/imagecache/list',
      'title' => t('List'),
      'type' => MENU_DEFAULT_LOCAL_TASK,
      'weight' => -10,
    );
    $items[] = array(
      'path' => 'admin/build/imagecache/add',
      'title' => t('Add New Preset'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('imagecache_ui_preset_add_form'),
      'access' => user_access('administer imagecache'),
      'type' => MENU_LOCAL_TASK,
    );
  }
  // Use Dynamic menu items to get better breadcrumb trails by default.
  elseif (arg(0) == 'admin' && arg(1) == 'build' && arg(2) == 'imagecache' && arg(3) == 'preset') {
    $preset = imagecache_preset(arg(4));
    if (empty($preset)) {
      return $items;
    }
    $t = array('!presetname' => $preset['presetname']);
    $items[] = array(
      'path' => 'admin/build/imagecache/preset/'. arg(4) .'/delete',
      'title' =>  t('Delete Preset: !presetname', $t),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('imagecache_ui_preset_delete_form', arg(4)),
      'type' => MENU_CALLBACK,
    );
    $items[] = array(
      'path' => 'admin/build/imagecache/preset/'. arg(4) .'/flush',
      'title' =>  t('Flush Preset: !presetname', $t),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('imagecache_ui_preset_flush_form', arg(4)),
      'access' => user_access('flush imagecache'),
      'type' => MENU_CALLBACK,
    );
    $items[] = array(
      'path' => 'admin/build/imagecache/preset/'. arg(4),
      'title' =>  t('!presetname', $t),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('imagecache_ui_preset_form', arg(4)),
      'type' => MENU_CALLBACK,
    );

    $definition = imagecache_action_definition(arg(7));
    if (!empty($definition)) {
      $t['!action'] = $definition['name'];
      $items[] = array(
        'path' => 'admin/build/imagecache/preset/'. arg(4) .'/action/add/'. arg(7),
        'title' =>  t('Add !action to !presetname', $t),
        'callback' => 'drupal_get_form',
        'callback arguments' => array('imagecache_ui_action_add_form', arg(4), arg(7)),
        'type' => MENU_CALLBACK,
      );
    }

    $action = imagecache_action(arg(6));
    if ($action) {
      $t['!action'] = $action['name'];
      $items[] = array(
        'path' => 'admin/build/imagecache/preset/'. arg(4) .'/action/'. arg(6),
        'title' =>  t('!action for preset !presetname', $t),
        'callback' => 'drupal_get_form',
        'callback arguments' => array('imagecache_ui_action_form', arg(6)),
        'type' => MENU_CALLBACK,
      );

      $items[] = array(
        'path' => 'admin/build/imagecache/preset/'. arg(4) .'/action/'. arg(6) .'/delete',
        'title' =>  t('Delete !action for preset !presetname', $t),
        'callback' => 'drupal_get_form',
        'callback arguments' => array('imagecache_ui_action_delete_form', arg(4), arg(6)),
        'type' => MENU_CALLBACK,
      );
    }
  }
  return $items;
}

/**
 * Preset Admin callbacks and required functions.
 */

function imagecache_ui_presets() {
  $header = array(t('Preset Name'), t('Actions'));
  $rows = array();
  foreach (imagecache_presets() as $preset) {
    $row = array();
    $row[] = l($preset['presetname'], 'admin/build/imagecache/preset/'. $preset['presetid']);
    $links = array();
    $links[] = l(t('edit'), 'admin/build/imagecache/preset/'. $preset['presetid']);
    $links[] = l(t('remove'), 'admin/build/imagecache/preset/'. $preset['presetid'] .'/delete');
    $links[] = l(t('flush'), 'admin/build/imagecache/preset/'. $preset['presetid'] .'/flush' );
    $row[] = implode('&nbsp;&nbsp;&nbsp;&nbsp;', $links);
    $rows[] = $row;
  }
  $output = theme('table', $header, $rows);
  return $output;
}

function imagecache_ui_preset_add_form($presetid = 0) {
  $form = array();
  $form['presetname'] = array(
    '#type' => 'textfield',
    '#size' => '64',
    '#title' => t('Preset Namespace'),
    '#default_value' => '',
    '#description' => t('The namespace is used in URLs for images to tell imagecache how to process an image. Please only use alphanumeric characters, underscores (_), and hyphens (-) for preset names.'),
    '#validate' => array('imagecache_element_presetname_validate' => array()),
  );
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Create New Preset'),
  );
  return $form;
}

function  imagecache_ui_preset_add_form_submit($id, $form_values) {
  $preset = array('presetname' => $form_values['presetname']);
  $preset = imagecache_preset_save($preset);
  drupal_set_message(t('Preset "%name" (ID: @id) Created.', array('%name' => $preset['presetname'], '@id' => $preset['presetid'])));
  return 'admin/build/imagecache/preset/'. $preset['presetid'];
}

function imagecache_element_presetname_validate($element) {
  // Check for duplicates
  $presets = imagecache_presets();
  if (in_array($element['#value'], $presets)) {
    form_set_error($element['#name'], t('The namespace you have chosen is already in use.'));
  }

  // Check for illegal characters in preset names
  if (preg_match('/[^0-9a-zA-Z_\-]/', $element['#value'])) {
    form_set_error($element['#name'], t('Please only use alphanumeric characters, underscores (_), and hyphens (-) for preset names.'));
  }
}

function imagecache_ui_preset_delete_form($presetid) {
  $preset = imagecache_preset($presetid);

  if (!$preset) {
    drupal_set_message(t('The specified preset was not found'), 'error');
    drupal_goto('admin/build/imagecache');
  }

  $form = array();
  $form['presetid'] = array('#type' => 'value', '#value' => $preset['presetid']);
  return confirm_form(
    $form,
    t('Are you sure you want to delete the preset %preset?',
      array('%preset' => $preset['presetname'])
    ),
    'admin/build/imagecache',
    t('This action cannot be undone.'),
    t('Delete'),  t('Cancel')
  );
}

function imagecache_ui_preset_delete_form_submit($form_id, $form_values) {
  $preset = imagecache_preset($form_values['presetid']);
  imagecache_preset_delete($preset);
  drupal_set_message(t('Preset "%name" (ID: @id) deleted.', array('%name' => $preset['presetname'], '@id' => $preset['presetid'])));
  return 'admin/build/imagecache';
}

function imagecache_ui_preset_flush_form($presetid) {
  $preset = imagecache_preset($presetid);

  if (!$preset) {
    drupal_set_message(t('The specified preset was not found'), 'error');
    drupal_goto('admin/build/imagecache');
  }

  $form = array();
  $form['presetid'] = array('#type' => 'value', '#value' => $preset['presetid']);
  return confirm_form(
    $form,
    t('Are you sure you want to flush the preset %preset?',
      array('%preset' => $preset['presetname'])
    ),
    'admin/build/imagecache',
    t('This action cannot be undone.'),
    t('Flush'),  t('Cancel')
  );
}

function imagecache_ui_preset_flush_form_submit($form_id, $form_values) {
  $preset = imagecache_preset($form_values['presetid']);
  imagecache_preset_flush($preset);
  drupal_set_message(t('Preset "%name" (ID: @id) flushed.', array('%name' => $preset['presetname'], '@id' => $preset['presetid'])));
  return 'admin/build/imagecache';
}


function imagecache_ui_preset_form($presetid) {
  $preset = imagecache_preset($presetid, true);

  if (!$preset) {
    drupal_set_message(t('The specified preset was not found'), 'error');
    drupal_goto('admin/build/imagecache');
  }

  $form = array();
  $form['presetname'] = array(
    '#type' => 'textfield',
    '#size' => '64',
    '#title' => t('Preset Namespace'),
    '#default_value' => $preset['presetname'],
    '#description' => t('The namespace is used in URLs for images to tell imagecache how to process an image. Please only use alphanumeric characters, underscores (_), and hyphens (-) for preset names.'),
    '#validate' => array('imagecache_element_presetname_validate' => array()),
  );
  $form['presetid'] = array(
    '#type' => 'value',
    '#value' => $preset['presetid'],
  );

  $form['actions'] = array(
    '#type' => 'fieldset',
    '#title' => t('Actions'),
    '#tree' => true,
    '#theme' => 'imagecache_ui_preset_actions',
  );


  foreach ($preset['actions'] as $i => $action) {
    // skip unknown actions...
    if (!$definition = imagecache_action_definition($action['action'])) {
      continue;
    }
    $action_name =  t($definition['name']);
    $action_form['name'] = array(
      '#value' => $action_name,
    );

    $action_form['action'] = array(
      '#type' => 'value',
      '#value' => $action['action'],
    );
    $action_form['actionid'] = array(
      '#type' => 'value',
      '#value' => $action['actionid'],
    );
    $action_form['presetid'] = array(
      '#type' => 'value',
      '#value' => $action['presetid'],
    );

    $action_form['settings'] = array(
      '#theme' => $action['action'],
      '#value' => $action['data'],
    );
    $action_form['data'] = array(
      '#type' => 'value',
      '#value' => $action['data'],
    );
    $action_form['weight'] = array(
      '#type' => 'weight',
      '#default_value' => $action['weight'],
    );
    $action_form['configure'] = array(
      '#value' => l(t('Configure'), 'admin/build/imagecache/preset/'. $action['presetid'] .'/action/'. $action['actionid'] ),
    );
    $action_form['remove'] = array(
      '#value' => l(t('Delete'), 'admin/build/imagecache/preset/'. $action['presetid'] .'/action/'. $action['actionid'] .'/delete'),
    );
    $form['actions'][$i] = $action_form;
  }

  $form['actions']['new'] = array(
    '#tree' => false,
    '#type' => 'fieldset',
    '#title' => t('New Actions'),
    '#collapsible' => true,
    '#collapsed' => true,
  );


  foreach (imagecache_action_definitions() as $action => $definition) {
    $form['actions']['new'][] = array(
      '#type' => 'markup',
      '#prefix' => '<div>',
      '#suffix' => '</div>',
      '#value' => l(t('Add !action', array('!action' => $definition['name'])),
                    'admin/build/imagecache/preset/'.  $preset['presetid'] .'/action/add/'. $action) .
                    ' - '. $definition['description'],
    );
  }

/**
 @todo: 404/403 image per preset.
 @todo: global 404/403 image.

  $form['files'] = array(
    '#type' => 'fieldset',
    '#collapsible' => true,
    '#collapsed' => true,
    '#title' =>  t('Error Files'),
  );

  $form['files']['403']['file'] = array(
    '#type' => 'file',
    '#title' => t('403 Image'),
    '#description' => t('Image that will be used when access is denied to the source image.'),
  );

  $path403 = imagecache/'. $preset['presetname'] .'/403.png';
  if (file_exists($path403)) {
    $url403 =  imagecache_create_url($preset['presetname'], $path403);

    $form['files']['403']['view'] = array(
      '#value' => '<img src="'. $url403 .'">',
    );
  }

  $form['files']['404'] = array(
    '#type' => 'file',
    '#title' => t('404 Image'),
    '#description' => t('Image that will be used when the source image cannot be found.'),
  );
  */

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Update Preset'),
  );

  // Display a preview image for this action. Put it below the submit button so
  // users don't have to do a bunch of scrolling.
  $preview_path = file_create_path('imagecache_sample.png');
  if (!file_exists($preview_path)) {
    // Copy of the image into the files directory so rather than generating it
    // from the original so we don't end up creating subdirectories mirroring
    // the path to the this module.
    $preview_path = drupal_get_path('module', 'imagecache_ui') .'/sample.png';
    file_copy($preview_path, 'imagecache_sample.png');
  }
  imagecache_image_flush($preview_path);
  $imagecache_path = imagecache_create_url($preset['presetname'], $preview_path, TRUE);
  $form['preview'] = array(
    '#type' => 'item',
    '#title' => t('Preview'),
    '#value' => l($imagecache_path, $imagecache_path) .'<br />'. l("<img src='$imagecache_path' />", $imagecache_path, array(), NULL, NULL, FALSE, TRUE),
  );

  return $form;
}


function theme_imagecache_admin_title($element) {
  return '<h2>'. $element['value'] .'</h2>';
}

function theme_imagecache_ui_preset_actions($element) {
  $header = array(t('Action'), t('Settings'), t('Weight'), '', '');
  $rows = array();
  foreach (element_children($element) as $key) {
    $row = array();
    $row[] = drupal_render($element[$key]['name']);
    $row[] = drupal_render($element[$key]['settings']);
    $row[] = drupal_render($element[$key]['weight']);
    $row[] = drupal_render($element[$key]['configure']);
    $row[] = drupal_render($element[$key]['remove']);
    $rows[] = $row;
  }
  $output .= theme('table', $header, $rows);
  $output .= drupal_render($element);
  return $output;
}

function imagecache_ui_preset_form_submit($form_id, $form_values) {
  if (isset($form_values['actions'])) {
    foreach ($form_values['actions'] as $action) {
      imagecache_action_save($action);
    }
  }
  imagecache_preset_save($form_values);
  return 'admin/build/imagecache/preset/'. $form_values['presetid'];
}

function imagecache_ui_action_form($actionid) {
  $definitions = imagecache_action_definitions();

  if (!$action = imagecache_action($actionid)) {
    drupal_set_message('Unknown Action.'. $actionid, 'error');
    drupal_goto('admin/build/imagecache');
  }

  if (!$preset = imagecache_preset($action['presetid'])) {
    drupal_set_message('Unknown Preset.');
    drupal_goto('admin/build/imagecache');
  }

  $form = array(
    '#tree' => true,
  );

  $form['actionid'] = array(
    '#type' => 'value',
    '#value' => $action['actionid'],
  );


  if ($definitions[$action['action']]['file']) {
    require_once($definitions[$action['action']]['file']);
  }
  $form['data'] = call_user_func($action['action'] .'_form', $action['data']);
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Update Action'),
  );
  return $form;
}

function imagecache_ui_action_form_submit($form_id, $form_values) {
  if ($action = imagecache_action($form_values['actionid'])) {
    $action = array_merge($action, $form_values);
    imagecache_action_save($action);
    drupal_set_message('Action Updated');
    return 'admin/build/imagecache/preset/'. $action['presetid'];
  }
  drupal_set_message('Unknown Action: '. $form_values['actionid']);
  return 'admin/build/imagecache';
}

function imagecache_ui_action_delete_form($presetid, $actionid) {
  if (!$action = imagecache_action($actionid)) {
    drupal_set_message('Unknown Action.'. $actionid, 'error');
    drupal_goto('admin/build/imagecache');
  }
  if (!$preset = imagecache_preset($action['presetid'])) {
    drupal_set_message('Unknown Preset.');
    drupal_goto('admin/build/imagecache');
  }

  $form = array();
  $form['actionid'] = array('#type' => 'value', '#value' => $action['actionid']);
  return confirm_form(
    $form,
    t('Are you sure you want to delete the !action action from preset !preset?',
      array('!preset' => $preset['presetname'], '!action' => $action['name'])
    ),
    'admin/build/imagecache',
    t('This action cannot be undone.'),
    t('Delete'),  t('Cancel')
  );
}


function imagecache_ui_action_delete_form_submit($form_id, $form_values) {
  $action = imagecache_action($form_values['actionid']);
  imagecache_action_delete($action);
  drupal_set_message(t('The action has been deleted.'));
  return 'admin/build/imagecache/preset/'. $action['presetid'];
}

function imagecache_ui_action_add_form($presetid, $actionname) {
  $definition = imagecache_action_definition($actionname);

  $form = array(
    '#tree' => true,
  );
  $form['action'] = array(
    '#type' => 'value',
    '#value' => $actionname,
  );
  $form['presetid'] = array(
    '#type' => 'value',
    '#value' => $presetid,
  );
  $form['weight'] = array(
    '#type' => 'weight',
    '#title' => t('Weight'),
  );

  $form['data'] = call_user_func($actionname .'_form', $action['data']);
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Add Action'),
  );
  return $form;
}


function imagecache_ui_action_add_form_submit($form_id, $form_values) {
  imagecache_action_save($form_values);
  return 'admin/build/imagecache/preset/'. $form_values['presetid'];
}