Added an export routine to export back from Drupal to ICS

export.php

@@ -0,0 +1,86 @@
+<?php
+
+namespace Pandy06269\iCalDrupal;
+
+use Pandy06269\iCalDrupal\includes\DrupalConfigFileReader;
+use Pandy06269\iCalDrupal\includes\DrupalDatabaseEventReader;
+use Pandy06269\iCalDrupal\includes\DrupalDatabaseEventWriter;
+use Pandy06269\iCalDrupal\includes\Event;
+use Pandy06269\iCalDrupal\includes\ICSEchoWriter;
+use Pandy06269\iCalDrupal\includes\ICSFileReader;
+
+//define('DEBUG', true);
+define('DRUPAL_CONFIG_FILE', '../sites/default/settings.php');
+
+function autoload_include_file($class)
+{
+    $class = substr($class, strlen('Pandy06269\\iCalDrupal\\'));
+
+    $filePath = sprintf('%s/%s.php', __DIR__, str_replace('\\', DIRECTORY_SEPARATOR, $class));
+    require_once $filePath;
+}
+
+spl_autoload_register('\Pandy06269\iCalDrupal\autoload_include_file');
+
+if (defined('DEBUG') && DEBUG)
+{
+    ini_set('display_errors', 'on');
+}
+
+try
+{
+    $drupalConfigReader = new DrupalConfigFileReader(DRUPAL_CONFIG_FILE);
+
+    $drupalEventReader = new DrupalDatabaseEventReader($drupalConfigReader);
+    $drupalEventReader->open();
+
+    $events = $drupalEventReader->getEvents();
+    usort($events, function(Event $x, Event $y)
+    {
+        if ($x->getStartDate() == $y->getStartDate())
+        {
+            return 0;
+        }
+        else if ($x->getStartDate() < $y->getStartDate())
+        {
+            return -1;
+        }
+        else
+        {
+            return 1;
+        }
+    });
+
+    $drupalEventReader->close();
+
+    header($_SERVER['SERVER_PROTOCOL'] . ' 200 OK', true, 200);
+    header('Content-Type: text/plain');
+
+    $icsWriter = new ICSEchoWriter();
+    $icsWriter->open();
+
+    /** @var Event $event */
+    foreach ($events as $event)
+    {
+        if ($event->getStartDate() > new \DateTime())
+        {
+            $icsWriter->write($event);
+        }
+    }
+
+    $icsWriter->close();
+}
+catch (\Exception $e)
+{
+    if (defined('DEBUG') && DEBUG)
+    {
+        echo sprintf('Caught exception: %s' . PHP_EOL, $e->getMessage());
+        echo $e->getTraceAsString();
+    }
+    else
+    {
+        echo 'An error occurred';
+    }
+
+    header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error', true, 500);
+}

import.php

@@ -1,23 +1,23 @@
 <?php
 
-namespace Pandy06269\iCalImporter;
+namespace Pandy06269\iCalDrupal;
 
-use Pandy06269\iCalImporter\includes\DrupalConfigFileReader;
+use Pandy06269\iCalDrupal\includes\DrupalConfigFileReader;
-use Pandy06269\iCalImporter\includes\DrupalDatabaseEventWriter;
+use Pandy06269\iCalDrupal\includes\DrupalDatabaseEventWriter;
-use Pandy06269\iCalImporter\includes\Event;
+use Pandy06269\iCalDrupal\includes\Event;
-use Pandy06269\iCalImporter\includes\ICSFileReader;
+use Pandy06269\iCalDrupal\includes\ICSFileReader;
 
 //define('DEBUG', true);
 
 function autoload_include_file($class)
 {
-    $class = substr($class, strlen('Pandy06269\\iCalImporter\\'));
+    $class = substr($class, strlen('Pandy06269\\iCalDrupal\\'));
 
     $filePath = sprintf('%s/%s.php', __DIR__, str_replace('\\', DIRECTORY_SEPARATOR, $class));
     require_once $filePath;
 }
 
-spl_autoload_register('\Pandy06269\iCalImporter\autoload_include_file');
+spl_autoload_register('\Pandy06269\iCalDrupal\autoload_include_file');
 
 if ($argc !== 3)
 {
@@ -87,7 +87,7 @@ try
 
         try
         {
-            $target->upload($event);
+            $target->write($event);
             echo 'OK' . PHP_EOL;
         }
         catch (\Exception $e)

includes/DrupalConfigFileReader.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Pandy06269\iCalImporter\includes;
+namespace Pandy06269\iCalDrupal\includes;
 
 class DrupalConfigFileReader extends FileReader
 {

includes/DrupalDatabaseEventReader.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace Pandy06269\iCalDrupal\includes;
+
+class DrupalDatabaseEventReader extends MysqlConnector implements IEventReader
+{
+    private $options = [];
+
+    public function __construct(DrupalConfigFileReader $configFileReader, array $options = [])
+    {
+        $this->config = $configFileReader->getDatabaseConfig();
+
+        $defaultOptions = [
+            'body_format' => 'content_editor_html',
+            'calendar_bundle' => 'private_event',
+            'end_date_field_name' => 'end_date',
+            'start_date_field_name' => 'start_date'
+        ];
+
+        $this->options = array_merge($defaultOptions, $options);
+    }
+
+    public function getEvents()
+    {
+        $events = [];
+
+        $results = $this->executeQueryResult(
+            'SELECT n.nid, n.uuid, MAX(nr.vid) AS vid FROM `node` n INNER JOIN `node_revision` nr ON nr.nid = n.nid WHERE (n.`type` = ? OR n.`type` = ?) GROUP BY n.nid, n.uuid',
+            ['s', 's'],
+            ['private_event', 'public_event']
+        );
+
+        $startDateTableName = sprintf('node_revision__field_%s', $this->options['start_date_field_name']);
+        $startDateFieldName = sprintf('field_%s_value', $this->options['start_date_field_name']);
+
+        $endDateTableName = sprintf('node_revision__field_%s', $this->options['end_date_field_name']);
+        $endDateFieldName = sprintf('field_%s_value', $this->options['end_date_field_name']);
+
+        foreach ($results as $result)
+        {
+            $nodeResults = $this->executeQueryResult(
+                sprintf(
+                    'SELECT * ' .
+                        'FROM `node_field_data` n ' .
+                        'LEFT OUTER JOIN `%s` ns ON ns.`entity_id` = n.`nid` AND ns.`revision_id` = n.`vid` ' .
+                        'LEFT OUTER JOIN `%s` ne ON ne.`entity_id` = n.`nid` AND ne.`revision_id` = n.`vid` ' .
+                        'LEFT OUTER JOIN `node_revision__body` nb ON nb.`entity_id` = n.`nid` AND nb.`revision_id` = n.`vid` ' .
+                        'WHERE n.`nid` = ? AND n.`vid` = ?',
+                    $startDateTableName,
+                    $endDateTableName
+                ),
+                ['i', 'i'],
+                [$result['nid'], $result['vid']]
+            );
+
+            $event = new Event();
+            $event->setTitle($nodeResults[0]['title']);
+            $event->setDescription(trim($nodeResults[0]['body_value']));
+
+            if (!empty($nodeResults[0][$startDateFieldName]))
+            {
+                $event->setStartDate(new \DateTime($nodeResults[0][$startDateFieldName]));
+            }
+
+            if (!empty($nodeResults[0][$endDateFieldName]))
+            {
+                $event->setEndDate(new \DateTime($nodeResults[0][$endDateFieldName]));
+            }
+
+            $event->setUid($result['uuid']);
+
+            $events[] = $event;
+        }
+
+        return $events;
+    }
+}

includes/DrupalDatabaseEventWriter.php

@@ -1,8 +1,8 @@
 <?php
 
-namespace Pandy06269\iCalImporter\includes;
+namespace Pandy06269\iCalDrupal\includes;
 
-class DrupalDatabaseEventWriter extends MysqlEventWriter
+class DrupalDatabaseEventWriter extends MysqlConnector implements IEventWriter
 {
     private $options = [];
 
@@ -20,7 +20,7 @@ class DrupalDatabaseEventWriter extends MysqlEventWriter
         $this->options = array_merge($defaultOptions, $options);
     }
 
-    public function upload(Event $event)
+    public function write(Event $event)
     {
         // First insert the `node` record
         $this->executeQuery(

includes/Event.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Pandy06269\iCalImporter\includes;
+namespace Pandy06269\iCalDrupal\includes;
 
 class Event
 {
@@ -9,6 +9,11 @@ class Event
      */
     private $description;
 
+    /**
+     * @var \DateTime
+     */
+    private $endDate;
+
     /**
      * @var \DateTime
      */
@@ -40,6 +45,22 @@ class Event
         $this->description = $description;
     }
 
+    /**
+     * @return \DateTime
+     */
+    public function getEndDate()
+    {
+        return $this->endDate;
+    }
+
+    /**
+     * @param \DateTime $endDate
+     */
+    public function setEndDate($endDate)
+    {
+        $this->endDate = $endDate;
+    }
+
     /**
      * @return \DateTime
      */

includes/FileReader.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Pandy06269\iCalImporter\includes;
+namespace Pandy06269\iCalDrupal\includes;
 
 class FileReader
 {

includes/ICSEchoWriter.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Pandy06269\iCalDrupal\includes;
+
+class ICSEchoWriter implements IEventWriter
+{
+    public function close()
+    {
+        echo ICSFileReader::HEADER_VCALENDAR_END . PHP_EOL;
+    }
+
+    public function open()
+    {
+        echo ICSFileReader::HEADER_VCALENDAR_BEGIN . PHP_EOL;
+    }
+
+    public function write(Event $event)
+    {
+        echo ICSFileReader::HEADER_VEVENT_BEGIN . PHP_EOL;
+
+        echo sprintf('%s%s' . PHP_EOL, ICSFileReader::HEADER_TITLE, $event->getTitle());
+
+        if (!empty($event->getDescription()))
+        {
+            $matches = [];
+            preg_match_all('/<p>(.+)<\/p>/', $event->getDescription(), $matches);
+
+            $isDescriptionStarted = false;
+            foreach ($matches[1] as $match)
+            {
+                if (strlen(trim($match)) > 0)
+                {
+                    if ($isDescriptionStarted)
+                    {
+                        echo $match . PHP_EOL;
+                    }
+                    else
+                    {
+                        echo sprintf('%s%s' . PHP_EOL, ICSFileReader::HEADER_DESCRIPTION, $match);
+                        $isDescriptionStarted = true;
+                    }
+                }
+            }
+        }
+
+        if (!is_null($event->getStartDate()))
+        {
+            $date = $event->getStartDate()->format('Ymd\\THis\\Z');
+
+            echo sprintf('%s%s' . PHP_EOL, ICSFileReader::HEADER_DATE, $date);
+        }
+
+        if (!is_null($event->getEndDate()))
+        {
+            $date = $event->getEndDate()->format('Ymd\\THis\\Z');
+
+            echo sprintf('%s%s' . PHP_EOL, ICSFileReader::HEADER_DATE_END, $date);
+        }
+
+        echo ICSFileReader::HEADER_VEVENT_END . PHP_EOL;
+    }
+}

includes/ICSFileReader.php

@@ -1,13 +1,15 @@
 <?php
 
-namespace Pandy06269\iCalImporter\includes;
+namespace Pandy06269\iCalDrupal\includes;
 
-class ICSFileReader extends FileReader
+class ICSFileReader extends FileReader implements IEventReader
 {
     const HEADER_VCALENDAR_BEGIN = 'BEGIN:VCALENDAR';
+    const HEADER_VCALENDAR_END = 'END:VCALENDAR';
     const HEADER_VEVENT_BEGIN = 'BEGIN:VEVENT';
     const HEADER_VEVENT_END = 'END:VEVENT';
     const HEADER_DATE = 'DTSTART:';
+    const HEADER_DATE_END = 'DTEND:';
     const HEADER_DESCRIPTION = 'DESCRIPTION:';
     const HEADER_TITLE = 'SUMMARY:';
     const HEADER_UID = 'UID:';

includes/IEventReader.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Pandy06269\iCalDrupal\includes;
+
+interface IEventReader
+{
+    function getEvents();
+}

includes/IEventWriter.php

@@ -1,10 +1,10 @@
 <?php
 
-namespace Pandy06269\iCalImporter\includes;
+namespace Pandy06269\iCalDrupal\includes;
 
 interface IEventWriter
 {
     function close();
     function open();
-    function upload(Event $event);
+    function write(Event $event);
 }

includes/MysqlConnector.php

@@ -1,8 +1,8 @@
 <?php
 
-namespace Pandy06269\iCalImporter\includes;
+namespace Pandy06269\iCalDrupal\includes;
 
-abstract class MysqlEventWriter implements IEventWriter
+class MysqlConnector
 {
     protected $config;
 
@@ -20,8 +20,11 @@ abstract class MysqlEventWriter implements IEventWriter
     }
 
     public function open()
+    {
+        if (defined('DEBUG') && DEBUG)
         {
             echo sprintf('Connecting to Drupal database called "%s" on "%s:%d"' . PHP_EOL, $this->config['database'], $this->config['host'], $this->config['port']);
+        }
 
         $this->connection = new \mysqli(
             $this->config['host'],
@@ -37,8 +40,6 @@ abstract class MysqlEventWriter implements IEventWriter
         }
     }
 
-    abstract function upload(Event $event);
-
     protected function executeQuery($sql, array $paramTypes = [], array $paramValues = [])
     {
         $statement = $this->prepareQueryStatement($sql, $paramTypes, $paramValues);