205 lines
6.4 KiB
Java
205 lines
6.4 KiB
Java
package app.fedilab.android.mastodon.client.entities.api;
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/* Copyright 2021 Thomas Schneider
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*
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* This file is a part of Fedilab
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Fedilab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Fedilab; if not,
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* see <http://www.gnu.org/licenses>. */
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import com.google.gson.Gson;
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import com.google.gson.annotations.SerializedName;
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import java.io.Serializable;
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import app.fedilab.android.mastodon.exception.DBException;
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import app.fedilab.android.sqlite.Sqlite;
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public class InstanceInfo implements Serializable {
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private final SQLiteDatabase db;
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@SerializedName("instance")
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public String instance;
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@SerializedName("info")
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public Instance info;
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public InstanceInfo() {
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db = null;
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}
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public InstanceInfo(Context context) {
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//Creation of the DB with tables
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this.db = Sqlite.getInstance(context.getApplicationContext(), Sqlite.DB_NAME, null, Sqlite.DB_VERSION).open();
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}
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/**
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* Serialized a list of Emoji class
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*
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* @param instance {@link Instance} to serialize
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* @return String serialized instance
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*/
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public static String instanceInfoToStringStorage(Instance instance) {
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Gson gson = new Gson();
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try {
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return gson.toJson(instance);
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* Unserialized an instance
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*
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* @param serializedInstanceInfo String serialized instance
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* @return {@link Instance}
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*/
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public static Instance restoreInstanceInfoFromString(String serializedInstanceInfo) {
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Gson gson = new Gson();
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try {
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return gson.fromJson(serializedInstanceInfo, Instance.class);
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* Insert or update instance
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*
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* @param instanceInfo {@link InstanceInfo}
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* @return long - db id
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* @throws DBException exception with database
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*/
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public long insertOrUpdate(InstanceInfo instanceInfo) throws DBException {
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if (db == null) {
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throw new DBException("db is null. Wrong initialization.");
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}
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if (instanceInfo == null) {
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return -1;
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}
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boolean exists = instanceInfoExist(instanceInfo);
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long idReturned;
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if (exists) {
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idReturned = updateInstanceInfo(instanceInfo);
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} else {
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idReturned = insertInstanceInfo(instanceInfo);
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}
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return idReturned;
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}
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/**
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* Check if instanceInfo exists in db
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*
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* @param instanceInfo InstanceInfo {@link InstanceInfo}
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* @return boolean - instanceInfo exists
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* @throws DBException Exception
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*/
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public boolean instanceInfoExist(InstanceInfo instanceInfo) throws DBException {
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if (db == null) {
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throw new DBException("db is null. Wrong initialization.");
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}
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Cursor mCount = db.rawQuery("select count(*) from " + Sqlite.TABLE_INSTANCE_INFO
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+ " where " + Sqlite.COL_INSTANCE + " = '" + instanceInfo.instance + "'", null);
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mCount.moveToFirst();
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int count = mCount.getInt(0);
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mCount.close();
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return (count > 0);
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}
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/**
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* Insert instanceInfo in db
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*
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* @param instanceInfo {@link InstanceInfo}
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* @return long - db id
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* @throws DBException exception with database
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*/
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private long insertInstanceInfo(InstanceInfo instanceInfo) throws DBException {
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if (db == null) {
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throw new DBException("db is null. Wrong initialization.");
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}
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ContentValues values = new ContentValues();
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values.put(Sqlite.COL_INSTANCE, instanceInfo.instance);
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values.put(Sqlite.COL_INFO, instanceInfoToStringStorage(instanceInfo.info));
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//Inserts instance
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try {
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return db.insertOrThrow(Sqlite.TABLE_INSTANCE_INFO, null, values);
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} catch (Exception e) {
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e.printStackTrace();
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return -1;
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}
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}
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/**
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* update instanceInfo in db
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*
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* @param instanceInfo {@link InstanceInfo}
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* @return long - db id
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* @throws DBException exception with database
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*/
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private long updateInstanceInfo(InstanceInfo instanceInfo) throws DBException {
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if (db == null) {
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throw new DBException("db is null. Wrong initialization.");
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}
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ContentValues values = new ContentValues();
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values.put(Sqlite.COL_INFO, instanceInfoToStringStorage(instanceInfo.info));
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//Inserts token
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try {
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return db.update(Sqlite.TABLE_INSTANCE_INFO,
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values, Sqlite.COL_INSTANCE + " = ?",
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new String[]{instanceInfo.instance});
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} catch (Exception e) {
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e.printStackTrace();
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return -1;
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}
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}
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/**
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* Returns the info for an instance
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*
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* @param instance String
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* @return InstanceInfo - {@link InstanceInfo}
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*/
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public Instance getInstanceInfo(String instance) throws DBException {
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if (db == null) {
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throw new DBException("db is null. Wrong initialization.");
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}
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try {
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Cursor c = db.query(Sqlite.TABLE_INSTANCE_INFO, null, Sqlite.COL_INSTANCE + " = '" + instance + "'", null, null, null, null, "1");
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return cursorToInstanceInfo(c);
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* Restore instanceInfo from db
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*
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* @param c Cursor
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* @return Instance
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*/
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private Instance cursorToInstanceInfo(Cursor c) {
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//No element found
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if (c.getCount() == 0) {
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c.close();
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return null;
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}
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//Take the first element
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c.moveToFirst();
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Instance instance = restoreInstanceInfoFromString(c.getString(c.getColumnIndexOrThrow(Sqlite.COL_INFO)));
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c.close();
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return instance;
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}
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}
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