islandora_microservices_monitor.module

<?php

/*
 * @file islandora_microservices_monitor.module
 * defines paths (drupal menu items) as entry points and acts as a hub for dispatching tasks to other modules.
 * 
 * 
 * This file is part of Islandora.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with the program.  If not, see <http ://www.gnu.org/licenses/>.
 */

/**
 * Implementation of hook_menu. 
 * Build menus for general view, object view and admin settings page.
 */
function islandora_microservices_monitor_menu() {
  $items = array();

  $items['admin/islandora/microservices_monitor'] = array(
    'title' => 'Microservices configuration',
    'description' => 'Configure settings for Islandora microservices.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('islandora_microservices_monitor_admin'),
    'access arguments' => array('administer site configuration'),
    'type' => MENU_NORMAL_ITEM,
    'weight' => -1,
  );

  $items['islandora_microservices_monitor'] = array(
    'title' => 'Islandora microservices monitor',
    'page callback' => 'islandora_microservices_monitor_view',
    'type' => MENU_NORMAL_ITEM,
    'access arguments' => array('administer site configuration'),
  );

  $items['islandora/object/%islandora_object/manage/microservices_monitor'] = array(
    'title' => 'Microservices',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('islandora_microservices_monitor_object_form', 2),
    'type' => MENU_LOCAL_TASK,
    'access arguments' => array('administer site configuration'),
    'weight' => 5,
  );

  return $items;
}

/**
 * Build form for admin settings
 * 
 * @return type 
 */
function islandora_microservices_monitor_admin() {
  $form = array();

  $form['islandora_microservices_monitor_listener_ip'] = array(
    '#type' => 'textfield',
    '#title' => t('Listener IP address'),
    '#default_value' => variable_get('islandora_microservices_monitor_listener_ip', 'localhost'),
    '#size' => 12,
  );

  $form['islandora_microservices_monitor_listener_port'] = array(
    '#type' => 'textfield',
    '#title' => t('Listener port'),
    '#default_value' => variable_get('islandora_microservices_monitor_listener_port', '80'),
    '#size' => 8,
  );

  return system_settings_form($form);
}

/**
 * Build general view for microservices log
 * 
 * @return type 
 */
function islandora_microservices_monitor_view() {
  $form = array();
  $ch = curl_init();
  $address = variable_get('islandora_microservices_monitor_listener_ip', 'localhost');
  $port = variable_get('islandora_microservices_monitor_listener_port', '80');
  curl_setopt($ch, CURLOPT_URL, "http://$address:$port/index.php?action=list");
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  $response = curl_exec($ch);
  curl_close($ch);
  $list_array = json_decode($response);
//  $list_array = array_filter(explode("\n", $list));
  $list_arrays = array();
  if ($list_array) {
    foreach ($list_array as $line) {
      $list_arrays[] = explode(', ', $line);
    }

    $headers = array(
      t('Date'),
      t('Time'),
      t('Level'),
      t('Action'),
      t('PID'),
      t('DSID'),
      t('User'),
      t('Message'),
      t('Script'),
    );

    $form['table'] = array(
      '#theme' => 'table',
      '#header' => $headers,
      '#rows' => $list_arrays,
    );
  }
  else {
    drupal_set_message(t('No respsonse from the processing server!'), 'warning');
  }

  return $form;
}

/**
 * Build form to show microservices events for individual objects
 * 
 * @param type $form
 * @param type $form_state
 * @param $fedora_object $object
 * @return $form
 */
function islandora_microservices_monitor_object_form($form, &$form_state, $object) {
  $ch = curl_init();
  $address = variable_get('islandora_microservices_monitor_listener_ip', 'localhost');
  $port = variable_get('islandora_microservices_monitor_listener_port', '80');
  curl_setopt($ch, CURLOPT_URL, "http://$address:$port/index.php?action=object&pid=$object->id");
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  $response = curl_exec($ch);
  curl_close($ch);
  $list_array = json_decode($response);
//  $list_array = array_filter(explode("\n", $list));
  $list_arrays = array();
  if ($list_array) {
    foreach ($list_array as $line) {
      $list_arrays[] = explode(', ', $line);
    }
  }

  $headers = array(
    t('Date'),
    t('Time'),
    t('Level'),
    t('Action'),
    t('PID'),
    t('DSID'),
    t('User'),
    t('Message'),
    t('Script'),
  );

  $form['table'] = array(
    '#theme' => 'table',
    '#header' => $headers,
    '#rows' => $list_arrays,
    '#empty' => t('No entries found for this object'),
  );


  return $form;
}