1 files changed, 107 insertions, 0 deletions
diff --git a/src/main/java/de/hysky/skyblocker/utils/datafixer/JsonHelper.java b/src/main/java/de/hysky/skyblocker/utils/datafixer/JsonHelper.java
new file mode 100644
index 00000000..f7646d31
--- /dev/null
+++ b/src/main/java/de/hysky/skyblocker/utils/datafixer/JsonHelper.java
@@ -0,0 +1,107 @@
+package de.hysky.skyblocker.utils.datafixer;
+
+import java.util.Optional;
+import java.util.OptionalInt;
+
+import com.google.gson.JsonObject;
+
+import net.minecraft.util.annotation.MethodsReturnNonnullByDefault;
+
+/**
+ * Helper methods to assist in retrieving values nested in JSON objects.
+ * 
+ * All methods are fully null safe, whether it be from passing a {@code null} root object or from encountering a nonexistent or null object/value.
+ * 
+ * @author AzureAaron
+ * @see <a href="https://github.com/AzureAaron/aaron-mod/blob/1.20/src/main/java/net/azureaaron/mod/utils/JsonHelper.java">Aaron's Mod's JSON Helper</a>
+ */
+@MethodsReturnNonnullByDefault
+public class JsonHelper {
+	
+	public static OptionalInt getInt(JsonObject root, String path) {
+		//If root is null
+		if (root == null) return OptionalInt.empty();
+		
+		//Fast path for if we just want the field itself
+		if (!path.contains(".")) {
+			return root.has(path) && !root.get(path).isJsonNull() ? OptionalInt.of(root.get(path).getAsInt()) : OptionalInt.empty();
+		}
+		
+		String[] split = path.split("\\.");
+		String propertyName = split[split.length - 1];
+		String[] objects2Traverse = new String[split.length - 1];
+		
+		//Get the traversal path
+		System.arraycopy(split, 0, objects2Traverse, 0, split.length - 1);
+		
+		JsonObject currentLevel = root;
+		
+		for (String objectName : objects2Traverse) {			
+			if (currentLevel.has(objectName) && !currentLevel.get(objectName).isJsonNull()) {
+				currentLevel = currentLevel.getAsJsonObject(objectName);
+			} else {
+				return OptionalInt.empty();
+			}
+		}
+		
+		return currentLevel.has(propertyName) && !currentLevel.get(propertyName).isJsonNull() ? OptionalInt.of(currentLevel.get(propertyName).getAsInt()) : OptionalInt.empty();
+	}
+	
+	public static Optional<Boolean> getBoolean(JsonObject root, String path) {
+		//If root is null
+		if (root == null) return Optional.empty();
+		
+		//Fast path for if we just want the field itself
+		if (!path.contains(".")) {
+			return root.has(path) && !root.get(path).isJsonNull() ? Optional.of(root.get(path).getAsBoolean()) : Optional.empty();
+		}
+		
+		String[] split = path.split("\\.");
+		String propertyName = split[split.length - 1];
+		String[] objects2Traverse = new String[split.length - 1];
+		
+		//Get the traversal path
+		System.arraycopy(split, 0, objects2Traverse, 0, split.length - 1);
+		
+		JsonObject currentLevel = root;
+		
+		for (String objectName : objects2Traverse) {			
+			if (currentLevel.has(objectName) && !currentLevel.get(objectName).isJsonNull()) {
+				currentLevel = currentLevel.getAsJsonObject(objectName);
+			} else {
+				return Optional.empty();
+			}
+		}
+		
+		return currentLevel.has(propertyName) && !currentLevel.get(propertyName).isJsonNull() ? Optional.of(currentLevel.get(propertyName).getAsBoolean()) : Optional.empty();
+	}
+	
+	public static Optional<String> getString(JsonObject root, String path) {
+		//If root is null
+		if (root == null) return Optional.empty();
+		
+		//Fast path for if we just want the field itself
+		if (!path.contains(".")) {
+			return root.has(path) && !root.get(path).isJsonNull() ? Optional.of(root.get(path).getAsString()) : Optional.empty();
+		}
+		
+		String[] split = path.split("\\.");
+		String propertyName = split[split.length - 1];
+		String[] objects2Traverse = new String[split.length - 1];
+		
+		//Get the traversal path
+		System.arraycopy(split, 0, objects2Traverse, 0, split.length - 1);
+		
+		JsonObject currentLevel = root;
+		
+		for (String objectName : objects2Traverse) {			
+			if (currentLevel.has(objectName) && !currentLevel.get(objectName).isJsonNull()) {
+				currentLevel = currentLevel.getAsJsonObject(objectName);
+			} else {
+				return Optional.empty();
+			}
+		}
+		
+		return currentLevel.has(propertyName) && !currentLevel.get(propertyName).isJsonNull() ? Optional.of(currentLevel.get(propertyName).getAsString()) : Optional.empty();
+	}
+}