From 198aeba7b431c17828798b8ce8aadbed9d47b580 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eirik=20Svag=C3=A5rd?= <eirik@readflow.io>
Date: Mon, 23 Dec 2019 04:00:56 +0100
Subject: [PATCH] Completed day 6

---
 .gitignore   |  2 ++
 php/day6.php | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)

diff --git a/.gitignore b/.gitignore
index e604cc3..fa4cfa9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+.gitignore
 *.txt
 header.php
 .ht*
+*.code-workspace
\ No newline at end of file
diff --git a/php/day6.php b/php/day6.php
index ba2e1f6..e1a9572 100644
--- a/php/day6.php
+++ b/php/day6.php
@@ -1,5 +1,68 @@
 <?php
 
+$input = "COM)B\nB)C\nC)D\nD)E\nE)F\nB)G\nG)H\nD)I\nE)J\nJ)K\nK)L\nK)YOU\nI)SAN";
+$input = file_get_contents("day6.txt");
+$inputArray = explode("\n", $input);
 
+foreach($inputArray as $key => $value){
+  list($orb, $obj) = explode(')', $value);
+  // echo $orb.")".$obj."<br>";
+  $objects[$orb][] = $obj;
+  $flippedObjects[$obj][] = $orb;
+}
+// echo "<br>";
 
+//PART 1
+$orbits = 0;
+foreach($inputArray as $key => $value){
+  list($orb, $obj) = explode(')', $value);
+  $orbits++;
+  $newOrb = $orb;
+  while($newOrb != "COM"){
+    if(isset($objects[$newOrb])){
+      $newOrb = $flippedObjects[$newOrb][0];
+      $orbits++;
+    }
+  }
+}
+
+//PART 2
+$newOrbP2 = $flippedObjects["YOU"][0];
+$orbits2 = 0;
+while($newOrbP2 != "COM"){
+  if(isset($objects[$newOrbP2])){
+    $path1[] = $newOrbP2;
+    $newOrbP2 = $flippedObjects[$newOrbP2][0];
+    $orbits2++;
+  }
+}
+
+$newOrbP2 = $flippedObjects["SAN"][0];
+$orbits3 = 0;
+while($newOrbP2 != "COM"){
+  if(isset($objects[$newOrbP2])){
+    if($temp = array_search($newOrbP2, $path1)){
+      // echo "Meeting: ".$newOrbP2;
+      break;
+    }
+    $newOrbP2 = $flippedObjects[$newOrbP2][0];
+    $orbits3++;
+  }
+}
+
+$jumps = $orbits3;
+foreach($path1 as $orb){
+  if($orb == $newOrbP2){ break; }
+  $jumps++;
+}
+
+echo "<h1>Number of orbits: $orbits</h1>";
+echo "<h1>Jumps from YOU to SAN: $jumps</h1>";
+die();
+echo "<br/><pre style='float:left;'>";
+print_r($path1);
+echo "</pre>";
+echo "<pre style='float:left;'>";
+print_r($flippedObjects);
+echo "</pre>";
 ?>
\ No newline at end of file