From 63a1b066bcebc998bd4a6a4c8cc56f38983b0639 Mon Sep 17 00:00:00 2001
From: Georg Ehrke <dev@georgswebsite.de>
Date: Sun, 13 May 2012 15:05:57 +0200
Subject: [PATCH] add first version of drop import

---
 apps/calendar/ajax/import/dropimport.php | 74 ++++++++++++++++++++++++
 apps/calendar/js/calendar.js             | 45 ++++++++++++++
 2 files changed, 119 insertions(+)
 create mode 100644 apps/calendar/ajax/import/dropimport.php

diff --git a/apps/calendar/ajax/import/dropimport.php b/apps/calendar/ajax/import/dropimport.php
new file mode 100644
index 0000000000..e98c282ef4
--- /dev/null
+++ b/apps/calendar/ajax/import/dropimport.php
@@ -0,0 +1,74 @@
+<?php
+$data = $_POST['data'];
+$data = explode(',', $data);
+$data = end($data);
+$data = base64_decode($data);
+OCP\JSON::checkLoggedIn();
+OCP\App::checkAppEnabled('calendar');
+$nl="\r\n";
+$comps = array('VEVENT'=>true, 'VTODO'=>true, 'VJOURNAL'=>true);
+$data = str_replace(array("\r","\n\n"), array("\n","\n"), $data);
+$lines = explode("\n", $data);
+unset($data);
+$comp=$uid=$cal=false;
+$cals=$uids=array();
+$i = 0;
+foreach($lines as $line) {
+	if(strpos($line, ':')!==false) {
+		list($attr, $val) = explode(':', strtoupper($line));
+		if ($attr == 'BEGIN' && $val == 'VCALENDAR') {
+			$cal = $i;
+			$cals[$cal] = array('first'=>$i,'last'=>$i,'end'=>$i);
+		} elseif ($attr =='BEGIN' && $cal!==false && isset($comps[$val])) {
+			$comp = $val;
+			$beginNo = $i;
+		} elseif ($attr == 'END' && $cal!==false && $val == 'VCALENDAR') {
+			if($comp!==false) {
+				unset($cals[$cal]); // corrupt calendar, unset it
+			} else {
+				$cals[$cal]['end'] = $i;
+			}
+			$comp=$uid=$cal=false; // reset calendar
+		} elseif ($attr == 'END' && $comp!==false && $val == $comp) {
+			if(! $uid) {
+				$uid = OC_Calendar_Object::createUID();
+			}
+			$uids[$uid][$beginNo] = array('end'=>$i, 'cal'=>$cal);
+			if ($cals[$cal]['first'] == $cal) {
+				$cals[$cal]['first'] = $beginNo;
+			}
+			$cals[$cal]['last'] = $i;
+			$comp=$uid=false; // reset component
+		} elseif ($attr =="UID" && $comp!==false) {
+			list($attr, $uid) = explode(':', $line);
+		}
+	}
+	$i++;
+}
+$calendars = OC_Calendar_Calendar::allCalendars(OCP\USER::getUser(), 1);
+$id = $calendars[0]['id'];
+foreach($uids as $uid) {
+	$prefix=$suffix=$content=array();
+	foreach($uid as $begin=>$details) {
+		$cal = $details['cal'];
+		if(!isset($cals[$cal])) {
+			continue; // from corrupt/incomplete calendar
+		}
+		$cdata = $cals[$cal];
+		// if we have multiple components from different calendar objects,
+		// we should really merge their elements (enhancement?) -- 1st one wins for now.
+		if(! count($prefix)) {
+			$prefix = array_slice($lines, $cal, $cdata['first'] - $cal);
+		}
+		if(! count($suffix)) {
+			$suffix = array_slice($lines, $cdata['last']+1, $cdata['end'] - $cdata['last']);
+		}
+		$content = array_merge($content, array_slice($lines, $begin, $details['end'] - $begin + 1));
+	}
+	if(count($content)) {
+		$import = join($nl, array_merge($prefix, $content, $suffix)) . $nl;
+		OC_Calendar_Object::add($id, $import);
+	}
+}
+OCP\JSON::success();
+?>
\ No newline at end of file
diff --git a/apps/calendar/js/calendar.js b/apps/calendar/js/calendar.js
index 80b5dd88c5..8a3f714c5f 100644
--- a/apps/calendar/js/calendar.js
+++ b/apps/calendar/js/calendar.js
@@ -601,6 +601,50 @@ Calendar={
 				});
 				/*var permissions = (this.checked) ? 1 : 0;*/
 			}
+		},
+		Drop:{
+			init:function(){
+				if (typeof window.FileReader === 'undefined') {
+					console.log('The drop-import feature is not supported in your browser :(');
+					return false;
+				}
+				droparea = document.getElementById('calendar_holder');
+				droparea.ondrop = function(e){
+					e.preventDefault();
+					Calendar.UI.Drop.drop(e);
+				}
+				console.log('Drop initialized successfully');
+			},
+			drop:function(e){
+				var files = e.dataTransfer.files;
+				for(var i = 0;i < files.length;i++){
+					var file = files[i]
+					reader = new FileReader();
+					reader.onload = function(event){
+						if(file.type != 'text/calendar'){
+							$('#notification').html('At least one file don\'t seems to be a calendar file. File skipped.');
+							$('#notification').slideDown();
+							window.setTimeout(function(){$('#notification').slideUp();}, 5000);
+							return false;
+						}else{
+							Calendar.UI.Drop.import(event.target.result);
+						}
+					}
+					reader.readAsDataURL(file);
+				}
+				$('#calendar_holder').fullCalendar('refetchEvents');
+			},
+			import:function(data){
+				$.post(OC.filePath('calendar', 'ajax/import', 'dropimport.php'), {'data':data},function(result) {
+					if(result.data == 'success'){
+						return true;
+					}else{
+						$('#notification').html('ownCloud wasn\'t able to import at least one file. File skipped.');
+						$('#notification').slideDown();
+						window.setTimeout(function(){$('#notification').slideUp();}, 5000);
+					}
+				});
+			}
 		}
 	}
 }
@@ -858,4 +902,5 @@ $(document).ready(function(){
 		$('#calendar_holder').fullCalendar('next');
 	});
 	Calendar.UI.Share.init();
+	Calendar.UI.Drop.init();
 });