up

app/src/main/java/io/legado/app/data/entities/BookSource.kt

@@ -10,6 +10,7 @@ import io.legado.app.constant.AppConst
 import io.legado.app.constant.AppConst.userAgent
 import io.legado.app.data.entities.rule.*
 import io.legado.app.help.JsExtensions
+import io.legado.app.utils.ACache
 import io.legado.app.utils.GSON
 import io.legado.app.utils.fromJsonObject
 import io.legado.app.utils.getPrefString
@@ -124,13 +125,18 @@ data class BookSource(
             if (a.isNotBlank()) {
                 try {
                     if (it.startsWith("<js>", false)) {
-                        val bindings = SimpleBindings()
-                        bindings["baseUrl"] = bookSourceUrl
-                        bindings["java"] = JsExtensions()
-                        a = AppConst.SCRIPT_ENGINE.eval(
-                            a.substring(4, a.lastIndexOf("<")),
-                            bindings
-                        ).toString()
+                        val aCache = ACache.get(App.INSTANCE, "explore")
+                        a = aCache.getAsString(bookSourceUrl) ?: ""
+                        if (a.isBlank()) {
+                            val bindings = SimpleBindings()
+                            bindings["baseUrl"] = bookSourceUrl
+                            bindings["java"] = JsExtensions()
+                            a = AppConst.SCRIPT_ENGINE.eval(
+                                it.substring(4, it.lastIndexOf("<")),
+                                bindings
+                            ).toString()
+                            aCache.put(bookSourceUrl, a)
+                        }
                     }
                     val b = a.split("(&&|\n)+".toRegex())
                     b.map { c ->

app/src/main/java/io/legado/app/utils/ACache.java

@@ -0,0 +1,846 @@
+//Copyright (c) 2017. 章钦豪. All rights reserved.
+package io.legado.app.utils;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.PixelFormat;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.RandomAccessFile;
+import java.io.Serializable;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+
+
+/**
+ * 本地缓存
+ */
+@SuppressWarnings({"unused", "ResultOfMethodCallIgnored", "WeakerAccess"})
+public class ACache {
+    public static final int TIME_HOUR = 60 * 60;
+    public static final int TIME_DAY = TIME_HOUR * 24;
+    private static final int MAX_SIZE = 1000 * 1000 * 50; // 50 mb
+    private static final int MAX_COUNT = Integer.MAX_VALUE; // 不限制存放数据的数量
+    private static Map<String, ACache> mInstanceMap = new HashMap<>();
+    private ACacheManager mCache;
+
+    private ACache(File cacheDir, long max_size, int max_count) {
+        try {
+            if (!cacheDir.exists() && !cacheDir.mkdirs()) {
+                Log.i("ACache", "can't make dirs in %s" + cacheDir.getAbsolutePath());
+            }
+            mCache = new ACacheManager(cacheDir, max_size, max_count);
+        } catch (Exception ignored) {
+        }
+    }
+
+    public static ACache get(Context ctx) {
+        return get(ctx, "ACache");
+    }
+
+    public static ACache get(Context ctx, String cacheName) {
+        File f = new File(ctx.getCacheDir(), cacheName);
+        return get(f, MAX_SIZE, MAX_COUNT);
+    }
+
+    public static ACache get(File cacheDir) {
+        return get(cacheDir, MAX_SIZE, MAX_COUNT);
+    }
+
+    public static ACache get(Context ctx, long max_zise, int max_count) {
+        try {
+            File f = new File(ctx.getCacheDir(), "ACache");
+            return get(f, max_zise, max_count);
+        } catch (Exception ignored) {
+        }
+
+        return null;
+    }
+
+    public static ACache get(File cacheDir, long max_zise, int max_count) {
+        try {
+            ACache manager = mInstanceMap.get(cacheDir.getAbsoluteFile() + myPid());
+            if (manager == null) {
+                manager = new ACache(cacheDir, max_zise, max_count);
+                mInstanceMap.put(cacheDir.getAbsolutePath() + myPid(), manager);
+            }
+            return manager;
+        } catch (Exception ignored) {
+        }
+
+        return null;
+    }
+
+    private static String myPid() {
+        return "_" + android.os.Process.myPid();
+    }
+
+    // =======================================
+    // ============ String数据 读写 ==============
+    // =======================================
+
+    /**
+     * 保存 String数据 到 缓存中
+     *
+     * @param key   保存的key
+     * @param value 保存的String数据
+     */
+    public void put(String key, String value) {
+        try {
+            File file = mCache.newFile(key);
+            BufferedWriter out = null;
+            try {
+                out = new BufferedWriter(new FileWriter(file), 1024);
+                out.write(value);
+            } catch (IOException ignored) {
+            } finally {
+                if (out != null) {
+                    try {
+                        out.flush();
+                        out.close();
+                    } catch (IOException ignored) {
+                    }
+                }
+                mCache.put(file);
+            }
+        } catch (Exception ignored) {
+        }
+
+    }
+
+    /**
+     * 保存 String数据 到 缓存中
+     *
+     * @param key      保存的key
+     * @param value    保存的String数据
+     * @param saveTime 保存的时间，单位：秒
+     */
+    public void put(String key, String value, int saveTime) {
+        put(key, Utils.newStringWithDateInfo(saveTime, value));
+    }
+
+    /**
+     * 读取 String数据
+     *
+     * @return String 数据
+     */
+    @Nullable
+    public String getAsString(String key) {
+        File file = mCache.get(key);
+        if (!file.exists())
+            return null;
+        boolean removeFile = false;
+        try (BufferedReader in = new BufferedReader(new FileReader(file))) {
+            StringBuilder readString = new StringBuilder();
+            String currentLine;
+            while ((currentLine = in.readLine()) != null) {
+                readString.append(currentLine);
+            }
+            if (!Utils.isDue(readString.toString())) {
+                return Utils.clearDateInfo(readString.toString());
+            } else {
+                removeFile = true;
+                return null;
+            }
+        } catch (IOException e) {
+            return null;
+        } finally {
+            if (removeFile)
+                remove(key);
+        }
+    }
+
+    // =======================================
+    // ========== JSONObject 数据 读写 =========
+    // =======================================
+
+    /**
+     * 保存 JSONObject数据 到 缓存中
+     *
+     * @param key   保存的key
+     * @param value 保存的JSON数据
+     */
+    public void put(String key, JSONObject value) {
+        put(key, value.toString());
+    }
+
+    /**
+     * 保存 JSONObject数据 到 缓存中
+     *
+     * @param key      保存的key
+     * @param value    保存的JSONObject数据
+     * @param saveTime 保存的时间，单位：秒
+     */
+    public void put(String key, JSONObject value, int saveTime) {
+        put(key, value.toString(), saveTime);
+    }
+
+    /**
+     * 读取JSONObject数据
+     *
+     * @return JSONObject数据
+     */
+    public JSONObject getAsJSONObject(String key) {
+        String JSONString = getAsString(key);
+        try {
+            return new JSONObject(JSONString);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    // =======================================
+    // ============ JSONArray 数据 读写 =============
+    // =======================================
+
+    /**
+     * 保存 JSONArray数据 到 缓存中
+     *
+     * @param key   保存的key
+     * @param value 保存的JSONArray数据
+     */
+    public void put(String key, JSONArray value) {
+        put(key, value.toString());
+    }
+
+    /**
+     * 保存 JSONArray数据 到 缓存中
+     *
+     * @param key      保存的key
+     * @param value    保存的JSONArray数据
+     * @param saveTime 保存的时间，单位：秒
+     */
+    public void put(String key, JSONArray value, int saveTime) {
+        put(key, value.toString(), saveTime);
+    }
+
+    /**
+     * 读取JSONArray数据
+     *
+     * @return JSONArray数据
+     */
+    public JSONArray getAsJSONArray(String key) {
+        String JSONString = getAsString(key);
+        try {
+            return new JSONArray(JSONString);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    // =======================================
+    // ============== byte 数据 读写 =============
+    // =======================================
+
+    /**
+     * 保存 byte数据 到 缓存中
+     *
+     * @param key   保存的key
+     * @param value 保存的数据
+     */
+    public void put(String key, byte[] value) {
+        File file = mCache.newFile(key);
+        FileOutputStream out = null;
+        try {
+            out = new FileOutputStream(file);
+            out.write(value);
+        } catch (Exception ignored) {
+        } finally {
+            if (out != null) {
+                try {
+                    out.flush();
+                    out.close();
+                } catch (IOException ignored) {
+                }
+            }
+            mCache.put(file);
+        }
+    }
+
+    /**
+     * 保存 byte数据 到 缓存中
+     *
+     * @param key      保存的key
+     * @param value    保存的数据
+     * @param saveTime 保存的时间，单位：秒
+     */
+    public void put(String key, byte[] value, int saveTime) {
+        put(key, Utils.newByteArrayWithDateInfo(saveTime, value));
+    }
+
+    /**
+     * 获取 byte 数据
+     *
+     * @return byte 数据
+     */
+    public byte[] getAsBinary(String key) {
+        RandomAccessFile RAFile = null;
+        boolean removeFile = false;
+        try {
+            File file = mCache.get(key);
+            if (!file.exists())
+                return null;
+            RAFile = new RandomAccessFile(file, "r");
+            byte[] byteArray = new byte[(int) RAFile.length()];
+            RAFile.read(byteArray);
+            if (!Utils.isDue(byteArray)) {
+                return Utils.clearDateInfo(byteArray);
+            } else {
+                removeFile = true;
+                return null;
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        } finally {
+            if (RAFile != null) {
+                try {
+                    RAFile.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+            if (removeFile)
+                remove(key);
+        }
+    }
+
+    // =======================================
+    // ============= 序列化 数据 读写 ===============
+    // =======================================
+
+    /**
+     * 保存 Serializable数据 到 缓存中
+     *
+     * @param key   保存的key
+     * @param value 保存的value
+     */
+    public void put(String key, Serializable value) {
+        put(key, value, -1);
+    }
+
+    /**
+     * 保存 Serializable数据到 缓存中
+     *
+     * @param key      保存的key
+     * @param value    保存的value
+     * @param saveTime 保存的时间，单位：秒
+     */
+    public void put(String key, Serializable value, int saveTime) {
+        ByteArrayOutputStream baos;
+        baos = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(baos)) {
+            oos.writeObject(value);
+            byte[] data = baos.toByteArray();
+            if (saveTime != -1) {
+                put(key, data, saveTime);
+            } else {
+                put(key, data);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * 读取 Serializable数据
+     *
+     * @return Serializable 数据
+     */
+    public Object getAsObject(String key) {
+        byte[] data = getAsBinary(key);
+        if (data != null) {
+            ByteArrayInputStream bais = null;
+            ObjectInputStream ois = null;
+            try {
+                bais = new ByteArrayInputStream(data);
+                ois = new ObjectInputStream(bais);
+                return ois.readObject();
+            } catch (Exception e) {
+                e.printStackTrace();
+                return null;
+            } finally {
+                try {
+                    if (bais != null)
+                        bais.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+                try {
+                    if (ois != null)
+                        ois.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        return null;
+
+    }
+
+    // =======================================
+    // ============== bitmap 数据 读写 =============
+    // =======================================
+
+    /**
+     * 保存 bitmap 到 缓存中
+     *
+     * @param key   保存的key
+     * @param value 保存的bitmap数据
+     */
+    public void put(String key, Bitmap value) {
+        put(key, Utils.Bitmap2Bytes(value));
+    }
+
+    /**
+     * 保存 bitmap 到 缓存中
+     *
+     * @param key      保存的key
+     * @param value    保存的 bitmap 数据
+     * @param saveTime 保存的时间，单位：秒
+     */
+    public void put(String key, Bitmap value, int saveTime) {
+        put(key, Utils.Bitmap2Bytes(value), saveTime);
+    }
+
+    /**
+     * 读取 bitmap 数据
+     *
+     * @return bitmap 数据
+     */
+    public Bitmap getAsBitmap(String key) {
+        if (getAsBinary(key) == null) {
+            return null;
+        }
+        return Utils.Bytes2Bimap(getAsBinary(key));
+    }
+
+    // =======================================
+    // ============= drawable 数据 读写 =============
+    // =======================================
+
+    /**
+     * 保存 drawable 到 缓存中
+     *
+     * @param key   保存的key
+     * @param value 保存的drawable数据
+     */
+    public void put(String key, Drawable value) {
+        put(key, Utils.drawable2Bitmap(value));
+    }
+
+    /**
+     * 保存 drawable 到 缓存中
+     *
+     * @param key      保存的key
+     * @param value    保存的 drawable 数据
+     * @param saveTime 保存的时间，单位：秒
+     */
+    public void put(String key, Drawable value, int saveTime) {
+        put(key, Utils.drawable2Bitmap(value), saveTime);
+    }
+
+    /**
+     * 读取 Drawable 数据
+     *
+     * @return Drawable 数据
+     */
+    public Drawable getAsDrawable(String key) {
+        if (getAsBinary(key) == null) {
+            return null;
+        }
+        return Utils.bitmap2Drawable(Utils.Bytes2Bimap(getAsBinary(key)));
+    }
+
+    /**
+     * 获取缓存文件
+     *
+     * @return value 缓存的文件
+     */
+    public File file(String key) {
+        try {
+            File f = mCache.newFile(key);
+            if (f.exists()) {
+                return f;
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return null;
+    }
+
+    /**
+     * 移除某个key
+     *
+     * @return 是否移除成功
+     */
+    public boolean remove(String key) {
+        return mCache.remove(key);
+    }
+
+    /**
+     * 清除所有数据
+     */
+    public void clear() {
+        mCache.clear();
+    }
+
+    /**
+     * @author 杨福海（michael） www.yangfuhai.com
+     * @version 1.0
+     * @title 时间计算工具类
+     */
+    private static class Utils {
+
+        private static final char mSeparator = ' ';
+
+        /**
+         * 判断缓存的String数据是否到期
+         *
+         * @return true：到期了 false：还没有到期
+         */
+        private static boolean isDue(String str) {
+            return isDue(str.getBytes());
+        }
+
+        /**
+         * 判断缓存的byte数据是否到期
+         *
+         * @return true：到期了 false：还没有到期
+         */
+        private static boolean isDue(byte[] data) {
+            try {
+                String[] strs = getDateInfoFromDate(data);
+                if (strs != null && strs.length == 2) {
+                    String saveTimeStr = strs[0];
+                    while (saveTimeStr.startsWith("0")) {
+                        saveTimeStr = saveTimeStr
+                                .substring(1);
+                    }
+                    long saveTime = Long.valueOf(saveTimeStr);
+                    long deleteAfter = Long.valueOf(strs[1]);
+                    if (System.currentTimeMillis() > saveTime + deleteAfter * 1000) {
+                        return true;
+                    }
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+
+            return false;
+        }
+
+        private static String newStringWithDateInfo(int second, String strInfo) {
+            return createDateInfo(second) + strInfo;
+        }
+
+        private static byte[] newByteArrayWithDateInfo(int second, byte[] data2) {
+            byte[] data1 = createDateInfo(second).getBytes();
+            byte[] retdata = new byte[data1.length + data2.length];
+            System.arraycopy(data1, 0, retdata, 0, data1.length);
+            System.arraycopy(data2, 0, retdata, data1.length, data2.length);
+            return retdata;
+        }
+
+        private static String clearDateInfo(String strInfo) {
+            if (strInfo != null && hasDateInfo(strInfo.getBytes())) {
+                strInfo = strInfo.substring(strInfo.indexOf(mSeparator) + 1);
+            }
+            return strInfo;
+        }
+
+        private static byte[] clearDateInfo(byte[] data) {
+            if (hasDateInfo(data)) {
+                return copyOfRange(data, indexOf(data, mSeparator) + 1,
+                        data.length);
+            }
+            return data;
+        }
+
+        private static boolean hasDateInfo(byte[] data) {
+            return data != null && data.length > 15 && data[13] == '-'
+                    && indexOf(data, mSeparator) > 14;
+        }
+
+        private static String[] getDateInfoFromDate(byte[] data) {
+            if (hasDateInfo(data)) {
+                String saveDate = new String(copyOfRange(data, 0, 13));
+                String deleteAfter = new String(copyOfRange(data, 14,
+                        indexOf(data, mSeparator)));
+                return new String[]{saveDate, deleteAfter};
+            }
+            return null;
+        }
+
+        private static int indexOf(byte[] data, char c) {
+            for (int i = 0; i < data.length; i++) {
+                if (data[i] == c) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+
+        private static byte[] copyOfRange(byte[] original, int from, int to) {
+            int newLength = to - from;
+            if (newLength < 0)
+                throw new IllegalArgumentException(from + " > " + to);
+            byte[] copy = new byte[newLength];
+            System.arraycopy(original, from, copy, 0,
+                    Math.min(original.length - from, newLength));
+            return copy;
+        }
+
+        private static String createDateInfo(int second) {
+            StringBuilder currentTime = new StringBuilder(System.currentTimeMillis() + "");
+            while (currentTime.length() < 13) {
+                currentTime.insert(0, "0");
+            }
+            return currentTime + "-" + second + mSeparator;
+        }
+
+        /*
+         * Bitmap → byte[]
+         */
+        private static byte[] Bitmap2Bytes(Bitmap bm) {
+            if (bm == null) {
+                return null;
+            }
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
+            return baos.toByteArray();
+        }
+
+        /*
+         * byte[] → Bitmap
+         */
+        private static Bitmap Bytes2Bimap(byte[] b) {
+            if (b.length == 0) {
+                return null;
+            }
+            return BitmapFactory.decodeByteArray(b, 0, b.length);
+        }
+
+        /*
+         * Drawable → Bitmap
+         */
+        private static Bitmap drawable2Bitmap(Drawable drawable) {
+            if (drawable == null) {
+                return null;
+            }
+            // 取 drawable 的长宽
+            int w = drawable.getIntrinsicWidth();
+            int h = drawable.getIntrinsicHeight();
+            // 取 drawable 的颜色格式
+            Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
+                    : Bitmap.Config.RGB_565;
+            // 建立对应 bitmap
+            Bitmap bitmap = Bitmap.createBitmap(w, h, config);
+            // 建立对应 bitmap 的画布
+            Canvas canvas = new Canvas(bitmap);
+            drawable.setBounds(0, 0, w, h);
+            // 把 drawable 内容画到画布中
+            drawable.draw(canvas);
+            return bitmap;
+        }
+
+        /*
+         * Bitmap → Drawable
+         */
+        @SuppressWarnings("deprecation")
+        private static Drawable bitmap2Drawable(Bitmap bm) {
+            if (bm == null) {
+                return null;
+            }
+            return new BitmapDrawable(bm);
+        }
+    }
+
+    /**
+     * @author 杨福海（michael） www.yangfuhai.com
+     * @version 1.0
+     * @title 缓存管理器
+     */
+    public class ACacheManager {
+        private final AtomicLong cacheSize;
+        private final AtomicInteger cacheCount;
+        private final long sizeLimit;
+        private final int countLimit;
+        private final Map<File, Long> lastUsageDates = Collections
+                .synchronizedMap(new HashMap<>());
+        protected File cacheDir;
+
+        private ACacheManager(File cacheDir, long sizeLimit, int countLimit) {
+            this.cacheDir = cacheDir;
+            this.sizeLimit = sizeLimit;
+            this.countLimit = countLimit;
+            cacheSize = new AtomicLong();
+            cacheCount = new AtomicInteger();
+            calculateCacheSizeAndCacheCount();
+        }
+
+        /**
+         * 计算 cacheSize和cacheCount
+         */
+        private void calculateCacheSizeAndCacheCount() {
+            new Thread(() -> {
+
+                try {
+                    int size = 0;
+                    int count = 0;
+                    File[] cachedFiles = cacheDir.listFiles();
+                    if (cachedFiles != null) {
+                        for (File cachedFile : cachedFiles) {
+                            size += calculateSize(cachedFile);
+                            count += 1;
+                            lastUsageDates.put(cachedFile,
+                                    cachedFile.lastModified());
+                        }
+                        cacheSize.set(size);
+                        cacheCount.set(count);
+                    }
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+
+            }).start();
+        }
+
+        private void put(File file) {
+
+            try {
+                int curCacheCount = cacheCount.get();
+                while (curCacheCount + 1 > countLimit) {
+                    long freedSize = removeNext();
+                    cacheSize.addAndGet(-freedSize);
+
+                    curCacheCount = cacheCount.addAndGet(-1);
+                }
+                cacheCount.addAndGet(1);
+
+                long valueSize = calculateSize(file);
+                long curCacheSize = cacheSize.get();
+                while (curCacheSize + valueSize > sizeLimit) {
+                    long freedSize = removeNext();
+                    curCacheSize = cacheSize.addAndGet(-freedSize);
+                }
+                cacheSize.addAndGet(valueSize);
+
+                long currentTime = System.currentTimeMillis();
+                file.setLastModified(currentTime);
+                lastUsageDates.put(file, currentTime);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+
+        }
+
+        private File get(String key) {
+            File file = newFile(key);
+            long currentTime = System.currentTimeMillis();
+            file.setLastModified(currentTime);
+            lastUsageDates.put(file, currentTime);
+
+            return file;
+        }
+
+        private File newFile(String key) {
+            return new File(cacheDir, key.hashCode() + "");
+        }
+
+        private boolean remove(String key) {
+            File image = get(key);
+            return image.delete();
+        }
+
+        private void clear() {
+            try {
+                lastUsageDates.clear();
+                cacheSize.set(0);
+                File[] files = cacheDir.listFiles();
+                if (files != null) {
+                    for (File f : files) {
+                        f.delete();
+                    }
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+
+        }
+
+        /**
+         * 移除旧的文件
+         */
+        private long removeNext() {
+            try {
+                if (lastUsageDates.isEmpty()) {
+                    return 0;
+                }
+
+                Long oldestUsage = null;
+                File mostLongUsedFile = null;
+                Set<Entry<File, Long>> entries = lastUsageDates.entrySet();
+                synchronized (lastUsageDates) {
+                    for (Entry<File, Long> entry : entries) {
+                        if (mostLongUsedFile == null) {
+                            mostLongUsedFile = entry.getKey();
+                            oldestUsage = entry.getValue();
+                        } else {
+                            Long lastValueUsage = entry.getValue();
+                            if (lastValueUsage < oldestUsage) {
+                                oldestUsage = lastValueUsage;
+                                mostLongUsedFile = entry.getKey();
+                            }
+                        }
+                    }
+                }
+
+                long fileSize = 0;
+                if (mostLongUsedFile != null) {
+                    fileSize = calculateSize(mostLongUsedFile);
+                    if (mostLongUsedFile.delete()) {
+                        lastUsageDates.remove(mostLongUsedFile);
+                    }
+                }
+                return fileSize;
+            } catch (Exception e) {
+                e.printStackTrace();
+                return 0;
+            }
+
+
+        }
+
+        private long calculateSize(File file) {
+            return file.length();
+        }
+    }
+
+}