mirror of
https://github.com/MultiMC/MultiMC5.git
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334 lines
9.1 KiB
C++
334 lines
9.1 KiB
C++
/* Copyright 2013-2019 MultiMC Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <QFileInfo>
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#include <QDir>
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#include <QDirIterator>
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#include <QCryptographicHash>
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#include <QJsonParseError>
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#include <QJsonDocument>
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#include <QJsonObject>
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#include <QVariant>
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#include <QDebug>
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#include "AssetsUtils.h"
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#include "FileSystem.h"
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#include "net/Download.h"
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#include "net/ChecksumValidator.h"
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#include "net/URLConstants.h"
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namespace {
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QSet<QString> collectPathsFromDir(QString dirPath)
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{
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QFileInfo dirInfo(dirPath);
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if (!dirInfo.exists())
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{
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return {};
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}
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QSet<QString> out;
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QDirIterator iter(dirPath, QDirIterator::Subdirectories);
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while (iter.hasNext())
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{
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QString value = iter.next();
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QFileInfo info(value);
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if(info.isFile())
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{
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out.insert(value);
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qDebug() << value;
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}
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}
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return out;
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}
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}
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namespace AssetsUtils
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{
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/*
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* Returns true on success, with index populated
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* index is undefined otherwise
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*/
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bool loadAssetsIndexJson(const QString &assetsId, const QString &path, AssetsIndex& index)
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{
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/*
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{
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"objects": {
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"icons/icon_16x16.png": {
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"hash": "bdf48ef6b5d0d23bbb02e17d04865216179f510a",
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"size": 3665
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},
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...
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}
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}
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}
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*/
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QFile file(path);
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// Try to open the file and fail if we can't.
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// TODO: We should probably report this error to the user.
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if (!file.open(QIODevice::ReadOnly))
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{
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qCritical() << "Failed to read assets index file" << path;
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return false;
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}
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index.id = assetsId;
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// Read the file and close it.
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QByteArray jsonData = file.readAll();
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file.close();
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QJsonParseError parseError;
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QJsonDocument jsonDoc = QJsonDocument::fromJson(jsonData, &parseError);
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// Fail if the JSON is invalid.
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if (parseError.error != QJsonParseError::NoError)
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{
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qCritical() << "Failed to parse assets index file:" << parseError.errorString()
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<< "at offset " << QString::number(parseError.offset);
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return false;
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}
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// Make sure the root is an object.
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if (!jsonDoc.isObject())
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{
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qCritical() << "Invalid assets index JSON: Root should be an array.";
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return false;
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}
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QJsonObject root = jsonDoc.object();
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QJsonValue isVirtual = root.value("virtual");
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if (!isVirtual.isUndefined())
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{
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index.isVirtual = isVirtual.toBool(false);
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}
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QJsonValue mapToResources = root.value("map_to_resources");
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if (!mapToResources.isUndefined())
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{
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index.mapToResources = mapToResources.toBool(false);
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}
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QJsonValue objects = root.value("objects");
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QVariantMap map = objects.toVariant().toMap();
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for (QVariantMap::const_iterator iter = map.begin(); iter != map.end(); ++iter)
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{
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// qDebug() << iter.key();
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QVariant variant = iter.value();
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QVariantMap nested_objects = variant.toMap();
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AssetObject object;
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for (QVariantMap::const_iterator nested_iter = nested_objects.begin();
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nested_iter != nested_objects.end(); ++nested_iter)
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{
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// qDebug() << nested_iter.key() << nested_iter.value().toString();
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QString key = nested_iter.key();
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QVariant value = nested_iter.value();
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if (key == "hash")
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{
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object.hash = value.toString();
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}
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else if (key == "size")
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{
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object.size = value.toDouble();
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}
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}
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index.objects.insert(iter.key(), object);
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}
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return true;
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}
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// FIXME: ugly code duplication
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QDir getAssetsDir(const QString &assetsId, const QString &resourcesFolder)
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{
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QDir assetsDir = QDir("assets/");
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QDir indexDir = QDir(FS::PathCombine(assetsDir.path(), "indexes"));
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QDir objectDir = QDir(FS::PathCombine(assetsDir.path(), "objects"));
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QDir virtualDir = QDir(FS::PathCombine(assetsDir.path(), "virtual"));
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QString indexPath = FS::PathCombine(indexDir.path(), assetsId + ".json");
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QFile indexFile(indexPath);
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QDir virtualRoot(FS::PathCombine(virtualDir.path(), assetsId));
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if (!indexFile.exists())
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{
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qCritical() << "No assets index file" << indexPath << "; can't determine assets path!";
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return virtualRoot;
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}
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AssetsIndex index;
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if(!AssetsUtils::loadAssetsIndexJson(assetsId, indexPath, index))
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{
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qCritical() << "Failed to load asset index file" << indexPath << "; can't determine assets path!";
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return virtualRoot;
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}
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QString targetPath;
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if(index.isVirtual)
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{
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return virtualRoot;
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}
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else if(index.mapToResources)
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{
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return QDir(resourcesFolder);
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}
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return virtualRoot;
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}
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// FIXME: ugly code duplication
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bool reconstructAssets(QString assetsId, QString resourcesFolder)
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{
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QDir assetsDir = QDir("assets/");
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QDir indexDir = QDir(FS::PathCombine(assetsDir.path(), "indexes"));
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QDir objectDir = QDir(FS::PathCombine(assetsDir.path(), "objects"));
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QDir virtualDir = QDir(FS::PathCombine(assetsDir.path(), "virtual"));
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QString indexPath = FS::PathCombine(indexDir.path(), assetsId + ".json");
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QFile indexFile(indexPath);
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QDir virtualRoot(FS::PathCombine(virtualDir.path(), assetsId));
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if (!indexFile.exists())
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{
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qCritical() << "No assets index file" << indexPath << "; can't reconstruct assets!";
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return false;
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}
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qDebug() << "reconstructAssets" << assetsDir.path() << indexDir.path() << objectDir.path() << virtualDir.path() << virtualRoot.path();
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AssetsIndex index;
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if(!AssetsUtils::loadAssetsIndexJson(assetsId, indexPath, index))
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{
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qCritical() << "Failed to load asset index file" << indexPath << "; can't reconstruct assets!";
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return false;
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}
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QString targetPath;
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bool removeLeftovers = false;
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if(index.isVirtual)
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{
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targetPath = virtualRoot.path();
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removeLeftovers = true;
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qDebug() << "Reconstructing virtual assets folder at" << targetPath;
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}
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else if(index.mapToResources)
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{
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targetPath = resourcesFolder;
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qDebug() << "Reconstructing resources folder at" << targetPath;
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}
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if (!targetPath.isNull())
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{
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auto presentFiles = collectPathsFromDir(targetPath);
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for (QString map : index.objects.keys())
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{
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AssetObject asset_object = index.objects.value(map);
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QString target_path = FS::PathCombine(targetPath, map);
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QFile target(target_path);
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QString tlk = asset_object.hash.left(2);
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QString original_path = FS::PathCombine(objectDir.path(), tlk, asset_object.hash);
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QFile original(original_path);
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if (!original.exists())
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continue;
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presentFiles.remove(target_path);
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if (!target.exists())
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{
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QFileInfo info(target_path);
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QDir target_dir = info.dir();
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qDebug() << target_dir.path();
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FS::ensureFolderPathExists(target_dir.path());
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bool couldCopy = original.copy(target_path);
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qDebug() << " Copying" << original_path << "to" << target_path << QString::number(couldCopy);
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}
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}
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// TODO: Write last used time to virtualRoot/.lastused
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if(removeLeftovers)
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{
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for(auto & file: presentFiles)
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{
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qDebug() << "Would remove" << file;
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}
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}
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}
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return true;
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}
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}
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NetActionPtr AssetObject::getDownloadAction()
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{
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QFileInfo objectFile(getLocalPath());
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if ((!objectFile.isFile()) || (objectFile.size() != size))
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{
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auto objectDL = Net::Download::makeFile(getUrl(), objectFile.filePath());
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if(hash.size())
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{
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auto rawHash = QByteArray::fromHex(hash.toLatin1());
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objectDL->addValidator(new Net::ChecksumValidator(QCryptographicHash::Sha1, rawHash));
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}
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objectDL->m_total_progress = size;
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return objectDL;
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}
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return nullptr;
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}
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QString AssetObject::getLocalPath()
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{
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return "assets/objects/" + getRelPath();
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}
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QUrl AssetObject::getUrl()
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{
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return URLConstants::RESOURCE_BASE + getRelPath();
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}
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QString AssetObject::getRelPath()
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{
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return hash.left(2) + "/" + hash;
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}
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NetJobPtr AssetsIndex::getDownloadJob()
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{
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auto job = new NetJob(QObject::tr("Assets for %1").arg(id));
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for (auto &object : objects.values())
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{
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auto dl = object.getDownloadAction();
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if(dl)
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{
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job->addNetAction(dl);
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}
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}
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if(job->size())
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return job;
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return nullptr;
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}
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