From 6d97aa2d273464e3cb6703a0527793c52583d4cd Mon Sep 17 00:00:00 2001
From: msquare <msquare@notrademark.de>
Date: Wed, 5 Oct 2016 22:28:39 +0200
Subject: continue working on shifts calendar renderer

---
 includes/view/ShiftCalendarRenderer.php | 56 ++++++++++++++++++++++++++++++++-
 1 file changed, 55 insertions(+), 1 deletion(-)

(limited to 'includes/view/ShiftCalendarRenderer.php')

diff --git a/includes/view/ShiftCalendarRenderer.php b/includes/view/ShiftCalendarRenderer.php
index 8356d033..41cf6f94 100644
--- a/includes/view/ShiftCalendarRenderer.php
+++ b/includes/view/ShiftCalendarRenderer.php
@@ -4,7 +4,61 @@ namespace Engelsystem;
 
 class ShiftCalendarRenderer {
 
-  public function __construct() {
+  /**
+   * 15m * 60s/m = 900s
+   */
+  const MINUTES_PER_ROW = 900;
+
+  private $shifts;
+
+  private $shiftsFilter;
+
+  public function __construct($shifts, ShiftsFilter $shiftsFilter) {
+    $this->shifts = $shifts;
+    $this->shiftsFilter = $shiftsFilter;
+  }
+
+  public function render() {
+    $rooms = $this->rooms();
+    $slotSizes = $this->calcSlotSizes($rooms);
+    
+    return '';
+  }
+
+  /**
+   * Calculates the slots for each room that appears in the shifts
+   */
+  private function rooms() {
+    $rooms = [];
+    foreach ($this->shifts as $shift) {
+      if (! isset($rooms[$shift['RID']])) {
+        $rooms[$shift['RID']] = $shift['room_name'];
+      }
+    }
+    return $rooms;
+  }
+
+  private function calcSlotSizes($rooms) {
+    $first_block_start_time = ShiftCalendarRenderer::MINUTES_PER_ROW * floor($this->shiftsFilter->getStartTime() / ShiftCalendarRenderer::MINUTES_PER_ROW);
+    $blocks_per_slot = ceil(($this->shiftsFilter->getEndTime() - $first_block_start_time) / ShiftCalendarRenderer::MINUTES_PER_ROW);
+    $parallel_blocks = [];
+    
+    // initialize $block array
+    foreach (array_keys($rooms) as $room_id) {
+      $parallel_blocks[$room_id] = array_fill(0, $blocks_per_slot, 0);
+    }
+    
+    // calculate number of parallel shifts in each timeslot for each room
+    foreach ($this->shifts as $shift) {
+      $room_id = $shift["RID"];
+      $shift_blocks = ($shift["end"] - $shift["start"]) / ShiftCalendarRenderer::MINUTES_PER_ROW;
+      $firstblock = floor(($shift["start"] - $first_block_start_time) / ShiftCalendarRenderer::MINUTES_PER_ROW);
+      for ($block = $firstblock; $block < $shift_blocks + $firstblock && $block < $blocks_per_slot; $block ++) {
+        $parallel_blocks[$room_id][$block] ++;
+      }
+    }
+    
+    return array_map('max', $parallel_blocks);
   }
 }
 
-- 
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