Changes download URLs of Paper to papermc.io

Updates software version
Stores version of downloaded Paper .jar files
Completes #8

src/main/java/net/knarcraft/minecraftserverlauncher/server/ServerTypeHandler.java

@@ -134,7 +134,7 @@ public class ServerTypeHandler {
                 break;
             case "Paper":
                 newType = new Paper("Paper", false, serverVersions, serverTypeInfo[2],
-                        serverTypeInfo[3]);
+                        serverTypeInfo[3], serverTypeInfo[4], serverTypeInfo[5]);
                 break;
             case "Bungee":
                 newType = new BungeeCord("Bungee", true, serverVersions, serverTypeInfo[2],

src/main/java/net/knarcraft/minecraftserverlauncher/server/ServerVersionContainer.java

@@ -22,6 +22,7 @@ public class ServerVersionContainer {
     private String bungeeVersion;
     private Map<String, String> waterfallVersions;
     private Map<String, String> travertineVersions;
+    private Map<String, String> paperVersions;
     private Map<String, String> spongeVanillaVersions;
     private Map<String, String> spongeForgeVersions;
     private String downloadedBuildToolsVersion;
@@ -32,6 +33,7 @@ public class ServerVersionContainer {
     private ServerVersionContainer() {
         this.waterfallVersions = new HashMap<>();
         this.travertineVersions = new HashMap<>();
+        this.paperVersions = new HashMap<>();
         this.spongeVanillaVersions = new HashMap<>();
         this.spongeForgeVersions = new HashMap<>();
         loadState();
@@ -58,6 +60,7 @@ public class ServerVersionContainer {
         this.bungeeVersion = null;
         this.waterfallVersions = new HashMap<>();
         this.travertineVersions = new HashMap<>();
+        this.paperVersions = new HashMap<>();
         this.spongeVanillaVersions = new HashMap<>();
         this.spongeForgeVersions = new HashMap<>();
         this.downloadedBuildToolsVersion = null;
@@ -70,6 +73,7 @@ public class ServerVersionContainer {
                 "bungeeVersion;" + bungeeVersion + "\n" +
                 "waterfallVersions;" + mapToString(waterfallVersions) + "\n" +
                 "travertineVersions;" + mapToString(travertineVersions) + "\n" +
+                "paperVersions;" + mapToString(paperVersions) + "\n" +
                 "spongeVanillaVersions;" + mapToString(spongeVanillaVersions) + "\n" +
                 "spongeForgeVersions;" + mapToString(spongeForgeVersions) + "\n" +
                 "downloadedBuildToolsVersion;" + downloadedBuildToolsVersion;
@@ -163,6 +167,9 @@ public class ServerVersionContainer {
             case "travertineVersions":
                 parseVersionsToMap(travertineVersions, variableValue);
                 break;
+            case "paperVersions":
+                parseVersionsToMap(paperVersions, variableValue);
+                break;
             case "spongeVanillaVersions":
                 parseVersionsToMap(spongeVanillaVersions, variableValue);
                 break;
@@ -291,6 +298,27 @@ public class ServerVersionContainer {
         saveState();
     }
 
+    /**
+     * Gets a specific paper version
+     *
+     * @param versionKey <p>The version to check the current version of</p>
+     * @return <p>The current paper version</p>
+     */
+    public String getPaperVersion(String versionKey) {
+        return this.paperVersions.get(versionKey);
+    }
+
+    /**
+     * Sets the current version for a given paper version
+     *
+     * @param mapKey <p>The version key to set version for</p>
+     * @param newValue <p>The new current version</p>
+     */
+    public void setPaperVersion(String mapKey, String newValue) {
+        this.paperVersions.put(mapKey, newValue);
+        saveState();
+    }
+
     /**
      * Gets a specific sponge vanilla version
      *

src/main/java/net/knarcraft/minecraftserverlauncher/server/servertypes/Paper.java

@@ -3,19 +3,25 @@ package net.knarcraft.minecraftserverlauncher.server.servertypes;
 /**
  * This class represents the Paper Minecraft server type
  */
-public class Paper extends Spigot {
+public class Paper extends Waterfall {
 
     /**
      * Instantiates a new Paper server type
      *
-     * @param typeName        <p>The name of the server type</p>
-     * @param isProxy         <p>Whether this server type is a proxy server</p>
-     * @param versions        <p>A list of one or more server versions for the type</p>
-     * @param downloadURL     <p>The URL used for downloading .jar files</p>
-     * @param downloadURLPart <p>A string used after the download url as an additional part of the URL</p>
+     * @param typeName    <p>The name of the server type</p>
+     * @param isProxy     <p>Whether this server type is a proxy server</p>
+     * @param versions    <p>The available versions for the server type</p>
+     * @param versionURL  <p>The URL used to finding the newest version</p>
+     * @param srcStart    <p>The string after which the version id starts</p>
+     * @param srcEnd      <p>The string marking the end of the version id</p>
+     * @param downloadURL <p>The URL used for downloading the latest version</p>
      */
-    public Paper(String typeName, boolean isProxy, String[] versions, String downloadURL, String downloadURLPart) {
-        super(typeName, isProxy, versions, downloadURL, downloadURLPart);
+    public Paper(String typeName, boolean isProxy, String[] versions, String versionURL, String srcStart,
+                 String srcEnd, String downloadURL) {
+        super(typeName, isProxy, versions, versionURL, srcStart, srcEnd, downloadURL);
+
+        this.oldVersionFunction = serverVersionContainer::getPaperVersion;
+        this.versionUpdateFunction = serverVersionContainer::setPaperVersion;
     }
 
 }