Implement WebManager that will download Challenges Libraries from Git…

…Hub.

Implement GUI for selecting and downloading Challenges Libraries.

src/main/java/world/bentobox/challenges/ChallengesAddon.java

@@ -21,6 +21,7 @@
 import world.bentobox.challenges.handlers.*;
 import world.bentobox.challenges.listeners.ResetListener;
 import world.bentobox.challenges.listeners.SaveListener;
+import world.bentobox.challenges.web.WebManager;
 import world.bentobox.level.Level;
 
 
@@ -39,6 +40,11 @@ public class ChallengesAddon extends Addon {
 
     private ChallengesImportManager importManager;
 
+    /**
+     * This class manages web content loading.
+     */
+    private WebManager webManager;
+
     private Settings settings;
 
     private boolean hooked;
@@ -138,6 +144,9 @@ public void onEnable() {
         // Challenge import setup
         this.importManager = new ChallengesImportManager(this);
 
+        // Web content loading
+        this.webManager = new WebManager(this);
+
         List<GameModeAddon> hookedGameModes = new ArrayList<>();
 
         this.getPlugin().getAddonsManager().getGameModeAddons().forEach(gameModeAddon -> {
@@ -315,6 +324,14 @@ public ChallengesImportManager getImportManager() {
     }
 
 
+    /**
+     * @return the webManager
+     */
+    public WebManager getWebManager() {
+        return this.webManager;
+    }
+
+
     /**
      * @return the challenge settings.
      */

src/main/java/world/bentobox/challenges/ChallengesImportManager.java

@@ -126,6 +126,77 @@ public boolean loadDefaultChallenges(User user, World world)
     }
 
 
+	/**
+	 * This method loads downloaded challenges into memory.
+	 * @param user User who calls downloaded challenge loading
+	 * @param world Target world.
+	 * @param downloadString String that need to be loaded via DefaultDataHolder.
+	 * @return <code>true</code> if everything was successful, otherwise <code>false</code>.
+	 */
+	public boolean loadDownloadedChallenges(User user, World world, String downloadString)
+	{
+		ChallengesManager manager = this.addon.getChallengesManager();
+
+		// If exist any challenge or level that is bound to current world, then do not load default challenges.
+		if (manager.hasAnyChallengeData(world.getName()))
+		{
+			if (user.isPlayer())
+			{
+				user.sendMessage("challenges.errors.exist-challenges-or-levels");
+			}
+			else
+			{
+				this.addon.logWarning("challenges.errors.exist-challenges-or-levels");
+			}
+
+			return false;
+		}
+
+		try
+		{
+			// This prefix will be used to all challenges. That is a unique way how to separate challenged for
+			// each game mode.
+			String uniqueIDPrefix = Utils.getGameMode(world) + "_";
+			DefaultDataHolder downloadedChallenges = new DefaultJSONHandler(this.addon).loadWebObject(downloadString);
+
+			// All new challenges should get correct ID. So we need to map it to loaded challenges.
+			downloadedChallenges.getChallengeList().forEach(challenge -> {
+				// Set correct challenge ID
+				challenge.setUniqueId(uniqueIDPrefix + challenge.getUniqueId());
+				// Set up correct level ID if it is necessary
+				if (!challenge.getLevel().isEmpty())
+				{
+					challenge.setLevel(uniqueIDPrefix + challenge.getLevel());
+				}
+				// Load challenge in memory
+				manager.loadChallenge(challenge, false, user, user == null);
+			});
+
+			downloadedChallenges.getLevelList().forEach(challengeLevel -> {
+				// Set correct level ID
+				challengeLevel.setUniqueId(uniqueIDPrefix + challengeLevel.getUniqueId());
+				// Set correct world name
+				challengeLevel.setWorld(Util.getWorld(world).getName());
+				// Reset names for all challenges.
+				challengeLevel.setChallenges(challengeLevel.getChallenges().stream().
+					map(challenge -> uniqueIDPrefix + challenge).
+					collect(Collectors.toSet()));
+				// Load level in memory
+				manager.loadLevel(challengeLevel, false, user, user == null);
+			});
+		}
+		catch (Exception e)
+		{
+			e.printStackTrace();
+			return false;
+		}
+
+		this.addon.getChallengesManager().save();
+
+		return true;
+	}
+
+
 // ---------------------------------------------------------------------
 // Section: Default generation
 // ---------------------------------------------------------------------
@@ -320,6 +391,16 @@ DefaultDataHolder loadObject()
 		}
 
 
+		/**
+		 * This method creates and adds to list all objects from default.json file.
+		 * @return List of all objects from default.json that is with T instance.
+		 */
+		DefaultDataHolder loadWebObject(String downloadedObject)
+		{
+			return this.gson.fromJson(downloadedObject, DefaultDataHolder.class);
+		}
+
+
     	// ---------------------------------------------------------------------
     	// Section: Variables
     	// ---------------------------------------------------------------------

src/main/java/world/bentobox/challenges/panel/CommonGUI.java

@@ -53,7 +53,7 @@ public abstract class CommonGUI
     /**
      * This variable stores parent gui.
      */
-    private CommonGUI parentGUI;
+    protected CommonGUI parentGUI;
 
     /**
      * Variable stores Challenges addon.
@@ -136,6 +136,7 @@ protected enum CommonButtons
 
     protected static final String COMPLETE = "complete";
 
+    protected static final String DOWNLOAD = "download";
 
     // ---------------------------------------------------------------------
     // Section: Constructors
@@ -205,6 +206,40 @@ public CommonGUI(ChallengesAddon addon,
     }
 
 
+    /**
+     * Default constructor that inits panels with minimal requirements.
+     * @param parentGUI Parent panel for current panel.
+     */
+    public CommonGUI(CommonGUI parentGUI)
+    {
+        this.addon = parentGUI.addon;
+        this.world = parentGUI.world;
+        this.user = parentGUI.user;
+
+        this.topLabel = parentGUI.topLabel;
+        this.permissionPrefix = parentGUI.permissionPrefix;
+
+        this.parentGUI = parentGUI;
+
+        this.pageIndex = 0;
+
+        this.returnButton = new PanelItemBuilder().
+            name(this.user.getTranslation("challenges.gui.buttons.return")).
+            icon(Material.OAK_DOOR).
+            clickHandler((panel, user1, clickType, i) -> {
+
+                if (this.parentGUI == null)
+                {
+                    this.user.closeInventory();
+                    return true;
+                }
+
+                this.parentGUI.build();
+                return true;
+            }).build();
+    }
+
+
     // ---------------------------------------------------------------------
     // Section: Common methods
     // ---------------------------------------------------------------------

src/main/java/world/bentobox/challenges/panel/admin/AdminGUI.java

@@ -63,7 +63,8 @@ private enum Button
         EDIT_SETTINGS,
         DEFAULT_IMPORT_CHALLENGES,
         DEFAULT_EXPORT_CHALLENGES,
-        COMPLETE_WIPE
+        COMPLETE_WIPE,
+        LIBRARY
     }
 
 
@@ -122,6 +123,8 @@ public void build()
 
         // Import Challenges
         panelBuilder.item(15, this.createButton(Button.DEFAULT_IMPORT_CHALLENGES));
+        panelBuilder.item(24, this.createButton(Button.LIBRARY));
+
         // Not added as I do not think admins should use it. It still will be able via command.
         //		panelBuilder.item(33, this.createButton(Button.DEFAULT_EXPORT_CHALLENGES));
 
@@ -439,6 +442,21 @@ private PanelItem createButton(Button button)
 
             break;
         }
+        case LIBRARY:
+        {
+            permissionSuffix = DOWNLOAD;
+
+            name = this.user.getTranslation("challenges.gui.buttons.admin.library");
+            description = this.user.getTranslation("challenges.gui.descriptions.admin.library");
+            icon = new ItemStack(Material.COBWEB);
+            clickHandler = (panel, user, clickType, slot) -> {
+                ListLibraryGUI.open(this);
+                return true;
+            };
+            glow = false;
+
+            break;
+        }
         default:
             // This should never happen.
             return null;