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/*
* This file is part of spark.
*
* Copyright (c) lucko (Luck) <luck@lucko.me>
* Copyright (c) contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package me.lucko.spark.common;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.JsonPrimitive;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;
public class ActivityLog {
private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
private static final JsonParser PARSER = new JsonParser();
private final Path file;
private final List<Activity> log = new LinkedList<>();
private final Object[] mutex = new Object[0];
public ActivityLog(Path file) {
this.file = file;
}
public void addToLog(Activity activity) {
synchronized (this.mutex) {
this.log.add(activity);
}
save();
}
public List<Activity> getLog() {
synchronized (this.mutex) {
return new LinkedList<>(this.log);
}
}
public void save() {
JsonArray array = new JsonArray();
synchronized (this.mutex) {
for (Activity activity : this.log) {
if (!activity.shouldExpire()) {
array.add(activity.serialize());
}
}
}
try {
Files.createDirectories(this.file.getParent());
} catch (IOException e) {
// ignore
}
try (BufferedWriter writer = Files.newBufferedWriter(this.file, StandardCharsets.UTF_8)) {
GSON.toJson(array, writer);
} catch (IOException e) {
e.printStackTrace();
}
}
public void load() {
if (!Files.exists(this.file)) {
synchronized (this.mutex) {
this.log.clear();
return;
}
}
JsonArray array;
try (BufferedReader reader = Files.newBufferedReader(this.file, StandardCharsets.UTF_8)) {
array = PARSER.parse(reader).getAsJsonArray();
} catch (IOException e) {
e.printStackTrace();
return;
}
boolean save = false;
synchronized (this.mutex) {
this.log.clear();
for (JsonElement element : array) {
try {
Activity activity = Activity.deserialize(element);
if (activity.shouldExpire()) {
save = true;
}
this.log.add(activity);
} catch (Exception e) {
e.printStackTrace();
}
}
}
if (save) {
try {
save();
} catch (Exception e) {
// ignore
}
}
}
public static final class Activity {
private final String user;
private final long time;
private final String type;
private final String url;
public Activity(String user, long time, String type, String url) {
this.user = user;
this.time = time;
this.type = type;
this.url = url;
}
public String getUser() {
return this.user;
}
public long getTime() {
return this.time;
}
public String getType() {
return this.type;
}
public String getUrl() {
return this.url;
}
public boolean shouldExpire() {
return (System.currentTimeMillis() - this.time) > TimeUnit.DAYS.toMillis(7);
}
public JsonObject serialize() {
JsonObject object = new JsonObject();
JsonObject user = new JsonObject();
user.add("name", new JsonPrimitive(this.user));
object.add("user", user);
object.add("time", new JsonPrimitive(this.time));
object.add("type", new JsonPrimitive(this.type));
JsonObject data = new JsonObject();
data.add("url", new JsonPrimitive(this.url));
object.add("data", data);
return object;
}
public static Activity deserialize(JsonElement element) {
JsonObject object = element.getAsJsonObject();
String user = object.get("user").getAsJsonObject().get("name").getAsJsonPrimitive().getAsString();
long time = object.get("time").getAsJsonPrimitive().getAsLong();
String type = object.get("type").getAsJsonPrimitive().getAsString();
String url = object.get("data").getAsJsonObject().get("url").getAsJsonPrimitive().getAsString();
return new Activity(user, time, type, url);
}
}
}
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