add support for Holograms plugin

pom.xml

@@ -44,6 +44,11 @@
             <artifactId>holographicdisplays-api</artifactId>
             <version>2.3.2</version>
         </dependency>
+        <dependency>
+            <groupId>com.sainttx.holograms</groupId>
+            <artifactId>holograms</artifactId>
+            <version>2.9.1-SNAPSHOT</version>
+        </dependency>
         <dependency>
             <groupId>net.tnemc</groupId>
             <artifactId>Reserve</artifactId>

src/main/java/com/songoda/core/library/hologram/HologramManager.java

@@ -122,6 +122,11 @@ public class HologramManager {
             defaultHolo.removeHologram(location);
     }
 
+    public static void removeAllHolograms() {
+        if (defaultHolo != null)
+            defaultHolo.removeAllHolograms();
+    }
+
     public static void updateHologram(Location location, String line) {
         if (defaultHolo != null)
             defaultHolo.updateHologram(location, line);

src/main/java/com/songoda/core/library/hologram/HologramType.java

@@ -1,6 +1,7 @@
 package com.songoda.core.library.hologram;
 
 import com.songoda.core.library.hologram.holograms.Holograms;
+import com.songoda.core.library.hologram.holograms.HologramsHolograms;
 import com.songoda.core.library.hologram.holograms.HolographicDisplaysHolograms;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
@@ -10,7 +11,9 @@ import java.util.logging.Level;
 
 public enum HologramType {
 
-    HOLOGRAPHIC_DISPLAYS("HolographicDisplays", HolographicDisplaysHolograms.class);
+    HOLOGRAPHIC_DISPLAYS("HolographicDisplays", HolographicDisplaysHolograms.class),
+    HOLOGRAMS("Holograms", HologramsHolograms.class)
+    ;
 
     public final String plugin;
     protected final Class managerClass;

src/main/java/com/songoda/core/library/hologram/holograms/Holograms.java

@@ -9,7 +9,7 @@ import java.util.List;
 public abstract class Holograms {
 
     protected double xOffset = 0.5;
-    protected double yOffset = 1.5;
+    protected double yOffset = 0.5;
     protected double zOffset = 0.5;
 
     protected final JavaPlugin plugin;
@@ -35,9 +35,11 @@ public abstract class Holograms {
         double x = location.getX();
         double y = location.getY();
         double z = location.getZ();
-        return location.clone().add((x - (int) x) + xOffset, (y - (int) y) + yOffset, (z - (int) z) + zOffset);
+        return location.clone().add((x - (int) x) + xOffset, (y - (int) y) + yOffset + defaultHeightOffset(), (z - (int) z) + zOffset);
     }
 
+    protected abstract double defaultHeightOffset();
+
     public abstract String getName();
 
     public void createHologram(Location location, String line) {
@@ -54,4 +56,5 @@ public abstract class Holograms {
 
     public abstract void updateHologram(Location location, List<String> lines);
 
+    public abstract void removeAllHolograms();
 }

src/main/java/com/songoda/core/library/hologram/holograms/HologramsHolograms.java

@@ -0,0 +1,97 @@
+package com.songoda.core.library.hologram.holograms;
+
+import com.sainttx.holograms.api.Hologram;
+import com.sainttx.holograms.api.HologramPlugin;
+import com.sainttx.holograms.api.line.HologramLine;
+import com.sainttx.holograms.api.line.TextLine;
+import java.util.HashSet;
+import org.bukkit.Location;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.util.List;
+import org.bukkit.Bukkit;
+
+public class HologramsHolograms extends Holograms {
+
+    HologramPlugin hologramPlugin;
+    HashSet<String> ourHolograms = new HashSet();
+
+    public HologramsHolograms(JavaPlugin plugin) {
+        super(plugin);
+        hologramPlugin = (HologramPlugin) Bukkit.getPluginManager().getPlugin("Holograms");
+    }
+
+    @Override
+    public String getName() {
+        return "Holograms";
+    }
+
+    @Override
+    protected double defaultHeightOffset() {
+        return 0.5;
+    }
+
+    @Override
+    public void createHologram(Location location, List<String> lines) {
+        createAt(fixLocation(location), lines);
+    }
+
+    @Override
+    public void removeHologram(Location location) {
+        location = fixLocation(location);
+        final String id = locStr(location);
+        Hologram hologram = hologramPlugin.getHologramManager().getHologram(id);
+        if (hologram != null) {
+            hologram.despawn();
+            hologramPlugin.getHologramManager().removeActiveHologram(hologram);
+        }
+        ourHolograms.remove(id);
+    }
+
+    @Override
+    public void removeAllHolograms() {
+        for(String id : ourHolograms) {
+            Hologram hologram = hologramPlugin.getHologramManager().getHologram(id);
+            if (hologram != null) {
+                hologram.despawn();
+                hologramPlugin.getHologramManager().removeActiveHologram(hologram);
+            }
+        }
+        ourHolograms.clear();
+    }
+
+    @Override
+    public void updateHologram(Location location, List<String> lines) {
+        location = fixLocation(location);
+        Hologram hologram = hologramPlugin.getHologramManager().getHologram(locStr(location));
+        if (hologram != null) {
+            for(HologramLine line : hologram.getLines().toArray(new HologramLine[0])) {
+                hologram.removeLine(line);
+            }
+            for (String line : lines) {
+                hologram.addLine(new TextLine(hologram, line));
+            }
+            return;
+        }
+        createAt(location, lines);
+    }
+
+    private String locStr(Location loc) {
+        return String.format("%s-%d-%d-%d", loc.getWorld().getName(), loc.getBlockX(), loc.getBlockY(), loc.getBlockZ());
+    }
+
+    private void createAt(Location location, List<String> lines) {
+
+        final String id = locStr(location);
+        Hologram hologram = new Hologram(id, location);
+        for (String line : lines) {
+            hologram.addLine(new TextLine(hologram, line));
+        }
+
+        hologramPlugin.getHologramManager().addActiveHologram(hologram);
+
+        if(!ourHolograms.contains(id))
+            ourHolograms.add(id);
+    }
+
+}

src/main/java/com/songoda/core/library/hologram/holograms/HolographicDisplaysHolograms.java

@@ -18,6 +18,11 @@ public class HolographicDisplaysHolograms extends Holograms {
         return "HolographicDisplays";
     }
 
+    @Override
+    protected double defaultHeightOffset() {
+        return 1;
+    }
+
     @Override
     public void createHologram(Location location, List<String> lines) {
         createAt(fixLocation(location), lines);
@@ -57,4 +62,9 @@ public class HolographicDisplaysHolograms extends Holograms {
         }
     }
 
+    @Override
+    public void removeAllHolograms() {
+        HologramsAPI.getHolograms(plugin).stream().forEach(x -> x.delete());
+    }
+
 }