From 0b02a6d123b2014705998c94ddf3d460948d3eac Mon Sep 17 00:00:00 2001
From: redmatrix <git@macgirvin.com>
Date: Tue, 10 May 2016 17:26:44 -0700
Subject: initial sabre upgrade (needs lots of work - to wit: authentication,
 redo the browser interface, and rework event export/import)

---
 vendor/sabre/vobject/lib/FreeBusyData.php | 193 ++++++++++++++++++++++++++++++
 1 file changed, 193 insertions(+)
 create mode 100644 vendor/sabre/vobject/lib/FreeBusyData.php

(limited to 'vendor/sabre/vobject/lib/FreeBusyData.php')

diff --git a/vendor/sabre/vobject/lib/FreeBusyData.php b/vendor/sabre/vobject/lib/FreeBusyData.php
new file mode 100644
index 000000000..0a6c72bb2
--- /dev/null
+++ b/vendor/sabre/vobject/lib/FreeBusyData.php
@@ -0,0 +1,193 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * FreeBusyData is a helper class that manages freebusy information.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class FreeBusyData {
+
+    /**
+     * Start timestamp
+     *
+     * @var int
+     */
+    protected $start;
+
+    /**
+     * End timestamp
+     *
+     * @var int
+     */
+    protected $end;
+
+    /**
+     * A list of free-busy times.
+     *
+     * @var array
+     */
+    protected $data;
+
+    function __construct($start, $end) {
+
+        $this->start = $start;
+        $this->end = $end;
+        $this->data = [];
+
+        $this->data[] = [
+            'start' => $this->start,
+            'end'   => $this->end,
+            'type'  => 'FREE',
+        ];
+
+    }
+
+    /**
+     * Adds free or busytime to the data.
+     *
+     * @param int $start
+     * @param int $end
+     * @param string $type FREE, BUSY, BUSY-UNAVAILABLE or BUSY-TENTATIVE
+     * @return void
+     */
+    function add($start, $end, $type) {
+
+        if ($start > $this->end || $end < $this->start) {
+
+            // This new data is outside our timerange.
+            return;
+
+        }
+
+        if ($start < $this->start) {
+            // The item starts before our requested time range
+            $start = $this->start;
+        }
+        if ($end > $this->end) {
+            // The item ends after our requested time range
+            $end = $this->end;
+        }
+
+        // Finding out where we need to insert the new item.
+        $currentIndex = 0;
+        while ($start > $this->data[$currentIndex]['end']) {
+            $currentIndex++;
+        }
+
+        // The standard insertion point will be one _after_ the first
+        // overlapping item.
+        $insertStartIndex = $currentIndex + 1;
+
+        $newItem = [
+            'start' => $start,
+            'end'   => $end,
+            'type'  => $type,
+        ];
+
+        $preceedingItem = $this->data[$insertStartIndex - 1];
+        if ($this->data[$insertStartIndex - 1]['start'] === $start) {
+            // The old item starts at the exact same point as the new item.
+            $insertStartIndex--;
+        }
+
+        // Now we know where to insert the item, we need to know where it
+        // starts overlapping with items on the tail end. We need to start
+        // looking one item before the insertStartIndex, because it's possible
+        // that the new item 'sits inside' the previous old item.
+        if ($insertStartIndex > 0) {
+            $currentIndex = $insertStartIndex - 1;
+        } else {
+            $currentIndex = 0;
+        }
+
+        while ($end > $this->data[$currentIndex]['end']) {
+
+            $currentIndex++;
+
+        }
+
+        // What we are about to insert into the array
+        $newItems = [
+            $newItem
+        ];
+
+        // This is the amount of items that are completely overwritten by the
+        // new item.
+        $itemsToDelete = $currentIndex - $insertStartIndex;
+        if ($this->data[$currentIndex]['end'] <= $end) $itemsToDelete++;
+
+        // If itemsToDelete was -1, it means that the newly inserted item is
+        // actually sitting inside an existing one. This means we need to split
+        // the item at the current position in two and insert the new item in
+        // between.
+        if ($itemsToDelete === -1) {
+            $itemsToDelete = 0;
+            if ($newItem['end'] < $preceedingItem['end']) {
+                $newItems[] = [
+                    'start' => $newItem['end'] + 1,
+                    'end'   => $preceedingItem['end'],
+                    'type'  => $preceedingItem['type']
+                ];
+            }
+        }
+
+        array_splice(
+            $this->data,
+            $insertStartIndex,
+            $itemsToDelete,
+            $newItems
+        );
+
+        $doMerge = false;
+        $mergeOffset = $insertStartIndex;
+        $mergeItem = $newItem;
+        $mergeDelete = 1;
+
+        if (isset($this->data[$insertStartIndex - 1])) {
+            // Updating the start time of the previous item.
+            $this->data[$insertStartIndex - 1]['end'] = $start;
+
+            // If the previous and the current are of the same type, we can
+            // merge them into one item.
+            if ($this->data[$insertStartIndex - 1]['type'] === $this->data[$insertStartIndex]['type']) {
+                $doMerge = true;
+                $mergeOffset--;
+                $mergeDelete++;
+                $mergeItem['start'] = $this->data[$insertStartIndex - 1]['start'];
+            }
+        }
+        if (isset($this->data[$insertStartIndex + 1])) {
+            // Updating the start time of the next item.
+            $this->data[$insertStartIndex + 1]['start'] = $end;
+
+            // If the next and the current are of the same type, we can
+            // merge them into one item.
+            if ($this->data[$insertStartIndex + 1]['type'] === $this->data[$insertStartIndex]['type']) {
+                $doMerge = true;
+                $mergeDelete++;
+                $mergeItem['end'] = $this->data[$insertStartIndex + 1]['end'];
+            }
+
+        }
+        if ($doMerge) {
+            array_splice(
+                $this->data,
+                $mergeOffset,
+                $mergeDelete,
+                [$mergeItem]
+            );
+        }
+
+    }
+
+    function getData() {
+
+        return $this->data;
+
+    }
+
+}
-- 
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