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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();
}
}
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