From 562d6887208f5b0731c369e7167c473725278f0c Mon Sep 17 00:00:00 2001
From: jeanvalentin51 <valentin.j.gheorghe.com>
Date: Sat, 26 Oct 2019 19:44:46 -0400
Subject: [PATCH] Add logic for playlist

---
 .gitignore                           |  5 ++-
 src/main/java/io/zipcoder/Music.java | 48 +++++++++++++++++++++++++++-
 2 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 9c9c1d2..becef19 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,4 +46,7 @@ atlassian-ide-plugin.xml
 com_crashlytics_export_strings.xml
 crashlytics.properties
 crashlytics-build.properties
-fabric.properties
\ No newline at end of file
+fabric.properties
+
+# Apple files
+*.DS_Store
\ No newline at end of file
diff --git a/src/main/java/io/zipcoder/Music.java b/src/main/java/io/zipcoder/Music.java
index 180c65c..782c13d 100644
--- a/src/main/java/io/zipcoder/Music.java
+++ b/src/main/java/io/zipcoder/Music.java
@@ -9,6 +9,52 @@ public Music(String[] playList){
     }
 
     public Integer selection(Integer startIndex, String selection){
-        return null;
+
+        int counterCurrentLocation = 0;
+        int counterUpArrow = 0;
+        int counterDownArrow = 0;
+        int counterNumberSteps = 0;
+
+        // up arrow direction
+        counterCurrentLocation = playList.length - 1;
+        if (startIndex != playList.length - 1) counterCurrentLocation = startIndex + 1;
+        counterUpArrow ++;
+
+
+        while (counterCurrentLocation != startIndex){
+            if (selection.equals(playList[counterCurrentLocation])) {
+                break;
+            }
+            // if we hit the end of the loop, reset and start from beginning of the list
+            if (counterCurrentLocation >= playList.length - 1){
+                counterCurrentLocation = 0;
+            }
+            counterCurrentLocation ++;
+            counterUpArrow ++;
+        }
+
+
+
+        // down arrow direction
+        counterCurrentLocation = 0;
+        if (startIndex != 0) counterCurrentLocation = startIndex - 1;
+        counterDownArrow ++;
+        counterNumberSteps = counterUpArrow;
+
+        while (counterCurrentLocation != startIndex){
+            if (selection.equals(playList[counterCurrentLocation])) {
+                break;
+            }
+            // if we hit the end of the loop, reset and start from beginning of the list
+            if (counterCurrentLocation <= 0){
+                counterCurrentLocation = playList.length;
+            }
+            counterCurrentLocation --;
+            counterDownArrow ++;
+        }
+
+        if (counterDownArrow < counterUpArrow) counterNumberSteps = counterDownArrow;
+
+        return counterNumberSteps;
     }
 }