* DTO representing full calendar grid, with events properly aligned

1 files changed, 84 insertions, 0 deletions

diff --git a/app/php/dto/CalendarGridDTO.php b/app/php/dto/CalendarGridDTO.php
new file mode 100644
index 0000000..f5d91a5
--- /dev/null
+++ b/app/php/dto/CalendarGridDTO.php
@@ -0,0 +1,84 @@
+<?php
+
+Prado::using('Application.dto.CalendarGridDayDTO');
+Prado::using('Application.dto.GridEventDTO');
+
+class CalendarGridDTO {
+
+    public $DateFrom;
+    public $DateTo;
+    public $Weeks = [];
+
+    public function __construct($events, DateTime $dateFrom, DateTime $dateTo) {
+        $this->DateFrom = DateTimeImmutable::createFromMutable($dateFrom);
+        $this->DateTo = DateTimeImmutable::createFromMutable($dateTo);
+        $date = $this->DateFrom;
+        $days = [];
+        $previousDay = NULL;
+        while ($date <= $this->DateTo) {
+            $day = $this->_getGridDay($date, $events, $previousDay);
+            $days[] = $day;
+            $previousDay = $day;
+            $date = $date->modify('+1 day');
+        }
+        $this->Weeks = array_chunk($days, 7);
+    }
+
+    private function _getContinuedEventGridPositions(
+        CalendarGridDayDTO $day,
+        CalendarGridDayDTO $previousDay = NULL) {
+        $eventPositions = [];
+        if ($previousDay) {
+            foreach ($day->Events as $event) {
+                if (in_array($event, $previousDay->Events)) {
+                    $eventPositions[] = $event->GridPosition;
+                }
+            }
+        }
+        return $eventPositions;
+    }
+
+    private function _alignEvents(array $eventPositions, array $events) {
+        $previousCount = count($eventPositions);
+        foreach ($events as $event) {
+            if ($event->GridPosition === NULL) {
+                $event->GridPosition = min(
+                    array_diff(
+                        range(0, count($events) + $previousCount),
+                        $eventPositions
+                    )
+                );
+                $eventPositions[] = $event->GridPosition;
+            }
+        }
+        usort($events, ['GridEventDTO', '__compare']);
+        return $events;
+    }
+
+    private function _fillEventGrid(array $events) {
+        $previousEvent = -1;
+        foreach ($events as $event) {
+            $eventStep = $event->GridPosition - $previousEvent;
+            if ($eventStep > 1) {
+                array_splice(
+                    $events, $previousEvent + 1, 0, array_fill(0, $eventStep - 1, NULL)
+                );
+            }
+            $previousEvent = $event->GridPosition;
+        }
+        return $events;
+    }
+
+    private function _getGridDay(DateTimeImmutable $date,
+                                 array $events,
+                                 CalendarGridDayDTO $previousDay = NULL) {
+        $day = new CalendarGridDayDTO($date, $events);
+        $eventPositions = $this->_getContinuedEventGridPositions($day, $previousDay);
+        $day->Events = $this->_alignEvents($eventPositions, $day->Events);
+        $day->Events = $this->_fillEventGrid($day->Events);
+        return $day;
+    }
+
+}
+
+?>