save player informations

src/main/java/me/unurled/sacredrealms/sr/data/gson/InventoryDeserializer.java

@@ -0,0 +1,42 @@
+package me.unurled.sacredrealms.sr.data.gson;
+
+import static me.unurled.sacredrealms.sr.utils.Logger.log;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import org.bukkit.Bukkit;
+import org.bukkit.event.inventory.InventoryType;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+
+public class InventoryDeserializer implements JsonDeserializer<Inventory> {
+
+    @Override
+    public Inventory deserialize(JsonElement jsonElement, Type type,
+        JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
+        Inventory inv = Bukkit.createInventory(null, InventoryType.PLAYER);
+        // parse from a string, to a list of string
+        String[] contents = jsonElement.getAsString().split(";");
+    // iterate through the list of strings and create ItemStacks with deserialize()
+    Gson gson =
+        new GsonBuilder()
+            .registerTypeAdapter(ItemStack.class, new ItemStackDeserializer())
+            .create();
+        for (int i = 0; i < contents.length; i++) {
+            if (contents[i].equals("null")) {
+                inv.setItem(i, null);
+            } else {
+                ItemStack item = gson.fromJson(contents[i], ItemStack.class);
+                if (item != null)
+                    inv.setItem(i, item);
+            }
+        }
+        return inv;
+    }
+}

src/main/java/me/unurled/sacredrealms/sr/data/gson/InventorySerializer.java

@@ -0,0 +1,27 @@
+package me.unurled.sacredrealms.sr.data.gson;
+
+import static me.unurled.sacredrealms.sr.utils.Logger.error;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+import org.bukkit.inventory.Inventory;
+
+public class InventorySerializer implements JsonSerializer<Inventory> {
+
+    @Override
+    public JsonElement serialize(Inventory itemStacks, Type type,
+        JsonSerializationContext jsonSerializationContext) {
+        List<String> collect = Arrays.stream(itemStacks.getContents())
+            .map(item -> item == null ? "null" : Arrays.toString(item.serializeAsBytes())).collect(Collectors.toList());
+
+        String s = String.join(";", collect);
+        return new JsonPrimitive(s);
+    }
+}

src/main/java/me/unurled/sacredrealms/sr/data/gson/ItemStackDeserializer.java

@@ -0,0 +1,26 @@
+package me.unurled.sacredrealms.sr.data.gson;
+
+import com.google.common.reflect.TypeToken;
+import com.google.gson.Gson;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import java.lang.reflect.Type;
+import java.util.Map;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+
+public class ItemStackDeserializer implements JsonDeserializer<ItemStack> {
+
+    @Override
+    public ItemStack deserialize(JsonElement jsonElement, Type type,
+        JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
+        Gson gson = new Gson();
+        byte[] mm = gson.fromJson(jsonElement, byte[].class);
+        if (mm != null) {
+            return ItemStack.deserializeBytes(mm);
+        }
+        return null;
+    }
+}

src/main/java/me/unurled/sacredrealms/sr/data/gson/PotionEffectDeserializer.java

@@ -0,0 +1,37 @@
+package me.unurled.sacredrealms.sr.data.gson;
+
+import static me.unurled.sacredrealms.sr.utils.Logger.error;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import java.lang.reflect.Type;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
+
+public class PotionEffectDeserializer implements JsonDeserializer<PotionEffect> {
+
+    @Override
+    public PotionEffect deserialize(JsonElement jsonElement, Type type,
+        JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
+        try {
+            String pot = jsonElement.getAsString();
+            pot = pot.replace("{", "").replace("}", "");
+            String[] parts = pot.split(",");
+            // find the potion effect type from the string part[0] is a key
+            PotionEffectType pet = Registry.POTION_EFFECT_TYPE.get(new NamespacedKey("minecraft",
+                parts[0]));
+            int duration = Integer.parseInt(parts[1]);
+            int amplifier = Integer.parseInt(parts[2]);
+            boolean particles = Boolean.parseBoolean(parts[3]);
+
+            return new PotionEffect(pet, duration, amplifier, false, particles, false);
+        } catch(Exception e) {
+            error("Error deserializing potion effect: " + e.getMessage());
+        }
+        return null;
+    }
+}

src/main/java/me/unurled/sacredrealms/sr/data/gson/PotionEffectSerializer.java

@@ -0,0 +1,27 @@
+package me.unurled.sacredrealms.sr.data.gson;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import java.lang.reflect.Type;
+import org.bukkit.potion.PotionEffect;
+
+public class PotionEffectSerializer implements JsonSerializer<PotionEffect> {
+
+    @Override
+    public JsonElement serialize(PotionEffect potionEffect, Type type,
+        JsonSerializationContext jsonSerializationContext) {
+        StringBuilder sb = new StringBuilder();
+        sb.append("{");
+        sb.append(potionEffect.getType().key());
+        sb.append(",");
+        sb.append(potionEffect.getDuration());
+        sb.append(",");
+        sb.append(potionEffect.getAmplifier());
+        sb.append(",").append(potionEffect.hasParticles());
+        sb.append("}");
+    return new JsonPrimitive(sb.toString());
+    }
+}