config thingies

3 files changed, 146 insertions, 0 deletions

diff --git a/src/main/java/io/polyfrost/oneconfig/interfaces/Config.java b/src/main/java/io/polyfrost/oneconfig/interfaces/Config.java
new file mode 100644
index 0000000..48abf1c
--- /dev/null
+++ b/src/main/java/io/polyfrost/oneconfig/interfaces/Config.java
@@ -0,0 +1,63 @@
+package io.polyfrost.oneconfig.interfaces;
+
+import com.google.gson.*;
+
+import java.io.*;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.nio.charset.StandardCharsets;
+import java.util.Map;
+
+public class Config {
+    private final File configFile;
+
+    public Config(File configFile) {
+        this.configFile = configFile;
+        if (configFile.exists())
+            load();
+        else
+            save();
+    }
+
+    Gson gson = new GsonBuilder().excludeFieldsWithModifiers(Modifier.TRANSIENT).setPrettyPrinting()
+            .registerTypeAdapterFactory(OneConfigTypeAdapterFactory.getStaticTypeAdapterFactory()).create();
+
+    public void save() {
+        try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(configFile), StandardCharsets.UTF_8))) {
+            writer.write(gson.toJson(this.getClass()));
+        } catch (IOException ignored) {
+        }
+    }
+
+    public void load() {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(configFile), StandardCharsets.UTF_8))) {
+            processPart(new JsonParser().parse(reader).getAsJsonObject(), this.getClass());
+        } catch (IOException ignored) {
+        }
+    }
+
+    private void processPart(JsonObject json, Class<?> clazz) {
+        for (Map.Entry<String, JsonElement> element : json.entrySet()) {
+            String name = element.getKey();
+            JsonElement value = element.getValue();
+            if (value.isJsonObject()) {
+                for (Class<?> innerClass : clazz.getClasses()) {
+                    if (innerClass.getSimpleName().equals(name)) {
+                        processPart(value.getAsJsonObject(), innerClass);
+                        break;
+                    }
+                }
+            } else {
+                try {
+                    Field field = clazz.getField(name);
+                    TypeAdapter<?> adapter = gson.getAdapter(field.getType());
+                    Object object = adapter.fromJsonTree(value);
+                    field.setAccessible(true);
+                    field.set(null, object);
+                } catch (NoSuchFieldException | IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+}
diff --git a/src/main/java/io/polyfrost/oneconfig/interfaces/OneConfigTypeAdapter.java b/src/main/java/io/polyfrost/oneconfig/interfaces/OneConfigTypeAdapter.java
new file mode 100644
index 0000000..95a558d
--- /dev/null
+++ b/src/main/java/io/polyfrost/oneconfig/interfaces/OneConfigTypeAdapter.java
@@ -0,0 +1,53 @@
+package io.polyfrost.oneconfig.interfaces;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParser;
+import com.google.gson.TypeAdapter;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+
+import java.io.IOException;
+import java.lang.reflect.Field;
+
+final class OneConfigTypeAdapter<T> extends TypeAdapter<Class<T>> {
+
+    private final Gson gson;
+    private final JsonParser parser = new JsonParser();
+
+    private OneConfigTypeAdapter(final Gson gson) {
+        this.gson = gson;
+    }
+
+    static <T> TypeAdapter<Class<T>> getStaticTypeAdapter(final Gson gson) {
+        return new OneConfigTypeAdapter<>(gson);
+    }
+
+    @Override
+    public void write(final JsonWriter out, final Class<T> value) throws IOException {
+        try {
+            out.beginObject();
+            for (Field field : value.getFields()) {
+                out.name(field.getName());
+                field.setAccessible(true);
+                final Object fieldValue = field.get(null);
+                final TypeAdapter<Object> adapter = (TypeAdapter) gson.getAdapter(field.getType());
+                adapter.write(out, fieldValue);
+            }
+            for (Class<?> clazz : value.getClasses()) {
+                System.out.println(clazz.toString());
+                out.name(clazz.getSimpleName());
+                final TypeAdapter<JsonElement> adapter = gson.getAdapter(JsonElement.class);
+                adapter.write(out, parser.parse(gson.toJson(clazz)));
+            }
+            out.endObject();
+        } catch (final IllegalAccessException ex) {
+            throw new IOException(ex);
+        }
+    }
+
+    @Override
+    public Class<T> read(final JsonReader in) throws IOException {
+        return null;
+    }
+}
diff --git a/src/main/java/io/polyfrost/oneconfig/interfaces/OneConfigTypeAdapterFactory.java b/src/main/java/io/polyfrost/oneconfig/interfaces/OneConfigTypeAdapterFactory.java
new file mode 100644
index 0000000..6491ba2
--- /dev/null
+++ b/src/main/java/io/polyfrost/oneconfig/interfaces/OneConfigTypeAdapterFactory.java
@@ -0,0 +1,30 @@
+package io.polyfrost.oneconfig.interfaces;
+
+import com.google.gson.Gson;
+import com.google.gson.TypeAdapter;
+import com.google.gson.TypeAdapterFactory;
+import com.google.gson.reflect.TypeToken;
+
+import java.lang.reflect.Type;
+
+import static io.polyfrost.oneconfig.interfaces.OneConfigTypeAdapter.getStaticTypeAdapter;
+
+public class OneConfigTypeAdapterFactory implements TypeAdapterFactory {
+
+    private static final TypeAdapterFactory staticTypeAdapterFactory = new OneConfigTypeAdapterFactory();
+
+    public static TypeAdapterFactory getStaticTypeAdapterFactory() {
+        return staticTypeAdapterFactory;
+    }
+
+    @Override
+    public <T> TypeAdapter<T> create(final Gson gson, final TypeToken<T> typeToken) {
+        final Type type = typeToken.getType();
+        if (type.equals(Class.class)) {
+            @SuppressWarnings("unchecked") final TypeAdapter<T> castStaticTypeAdapter = (TypeAdapter<T>) getStaticTypeAdapter(gson);
+            return castStaticTypeAdapter;
+        }
+        return null;
+    }
+
+}