632 lines
16 KiB
JavaScript
632 lines
16 KiB
JavaScript
/* jslint node: true */
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'use strict';
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// ENiGMA½
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const Config = require('./config.js').config;
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const Errors = require('./enig_error.js').Errors;
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const sortAreasOrConfs = require('./conf_area_util.js').sortAreasOrConfs;
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const FileEntry = require('./file_entry.js');
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const FileDb = require('./database.js').dbs.file;
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const ArchiveUtil = require('./archive_util.js');
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const CRC32 = require('./crc.js').CRC32;
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// deps
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const _ = require('lodash');
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const async = require('async');
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const fs = require('fs');
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const crypto = require('crypto');
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const paths = require('path');
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const temp = require('temp').track(); // track() cleans up temp dir/files for us
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const iconv = require('iconv-lite');
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exports.isInternalArea = isInternalArea;
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exports.getAvailableFileAreas = getAvailableFileAreas;
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exports.getSortedAvailableFileAreas = getSortedAvailableFileAreas;
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exports.getAreaDefaultStorageDirectory = getAreaDefaultStorageDirectory;
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exports.getDefaultFileAreaTag = getDefaultFileAreaTag;
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exports.getFileAreaByTag = getFileAreaByTag;
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exports.getFileEntryPath = getFileEntryPath;
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exports.changeFileAreaWithOptions = changeFileAreaWithOptions;
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exports.scanFile = scanFile;
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exports.scanFileAreaForChanges = scanFileAreaForChanges;
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const WellKnownAreaTags = exports.WellKnownAreaTags = {
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Invalid : '',
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MessageAreaAttach : 'system_message_attachment',
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};
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function isInternalArea(areaTag) {
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return areaTag === WellKnownAreaTags.MessageAreaAttach;
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}
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function getAvailableFileAreas(client, options) {
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options = options || { };
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// perform ACS check per conf & omit internal if desired
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const allAreas = _.map(Config.fileBase.areas, (areaInfo, areaTag) => Object.assign(areaInfo, { areaTag : areaTag } ));
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return _.omitBy(allAreas, areaInfo => {
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if(!options.includeSystemInternal && isInternalArea(areaInfo.areaTag)) {
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return true;
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}
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if(options.writeAcs && !client.acs.hasFileAreaWrite(areaInfo)) {
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return true; // omit
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}
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return !client.acs.hasFileAreaRead(areaInfo);
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});
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}
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function getSortedAvailableFileAreas(client, options) {
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const areas = _.map(getAvailableFileAreas(client, options), v => v);
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sortAreasOrConfs(areas);
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return areas;
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}
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function getDefaultFileAreaTag(client, disableAcsCheck) {
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let defaultArea = _.findKey(Config.fileBase, o => o.default);
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if(defaultArea) {
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const area = Config.fileBase.areas[defaultArea];
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if(true === disableAcsCheck || client.acs.hasFileAreaRead(area)) {
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return defaultArea;
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}
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}
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// just use anything we can
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defaultArea = _.findKey(Config.fileBase.areas, (area, areaTag) => {
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return WellKnownAreaTags.MessageAreaAttach !== areaTag && (true === disableAcsCheck || client.acs.hasFileAreaRead(area));
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});
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return defaultArea;
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}
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function getFileAreaByTag(areaTag) {
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const areaInfo = Config.fileBase.areas[areaTag];
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if(areaInfo) {
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areaInfo.areaTag = areaTag; // convienence!
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areaInfo.storage = getAreaStorageLocations(areaInfo);
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return areaInfo;
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}
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}
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function changeFileAreaWithOptions(client, areaTag, options, cb) {
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async.waterfall(
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[
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function getArea(callback) {
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const area = getFileAreaByTag(areaTag);
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return callback(area ? null : Errors.Invalid('Invalid file areaTag'), area);
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},
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function validateAccess(area, callback) {
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if(!client.acs.hasFileAreaRead(area)) {
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return callback(Errors.AccessDenied('No access to this area'));
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}
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},
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function changeArea(area, callback) {
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if(true === options.persist) {
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client.user.persistProperty('file_area_tag', areaTag, err => {
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return callback(err, area);
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});
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} else {
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client.user.properties['file_area_tag'] = areaTag;
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return callback(null, area);
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}
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}
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],
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(err, area) => {
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if(!err) {
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client.log.info( { areaTag : areaTag, area : area }, 'Current file area changed');
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} else {
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client.log.warn( { areaTag : areaTag, area : area, error : err.message }, 'Could not change file area');
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}
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return cb(err);
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}
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);
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}
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function getAreaStorageDirectoryByTag(storageTag) {
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const storageLocation = (storageTag && Config.fileBase.storageTags[storageTag]);
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return paths.resolve(Config.fileBase.areaStoragePrefix, storageLocation || '');
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}
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function getAreaDefaultStorageDirectory(areaInfo) {
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return getAreaStorageDirectoryByTag(areaInfo.storageTags[0]);
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}
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function getAreaStorageLocations(areaInfo) {
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const storageTags = Array.isArray(areaInfo.storageTags) ?
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areaInfo.storageTags :
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[ areaInfo.storageTags || '' ];
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const avail = Config.fileBase.storageTags;
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return _.compact(storageTags.map(storageTag => {
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if(avail[storageTag]) {
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return {
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storageTag : storageTag,
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dir : getAreaStorageDirectoryByTag(storageTag),
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};
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}
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}));
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}
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function getFileEntryPath(fileEntry) {
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const areaInfo = getFileAreaByTag(fileEntry.areaTag);
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if(areaInfo) {
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return paths.join(areaInfo.storageDirectory, fileEntry.fileName);
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}
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}
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function getExistingFileEntriesBySha256(sha256, cb) {
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const entries = [];
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FileDb.each(
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`SELECT file_id, area_tag
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FROM file
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WHERE file_sha256=?;`,
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[ sha256 ],
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(err, fileRow) => {
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if(fileRow) {
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entries.push({
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fileId : fileRow.file_id,
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areaTag : fileRow.area_tag,
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});
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}
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},
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err => {
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return cb(err, entries);
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}
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);
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}
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// :TODO: This is bascially sliceAtEOF() from art.js .... DRY!
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function sliceAtSauceMarker(data) {
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let eof = data.length;
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const stopPos = Math.max(data.length - (256), 0); // 256 = 2 * sizeof(SAUCE)
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for(let i = eof - 1; i > stopPos; i--) {
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if(0x1a === data[i]) {
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eof = i;
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break;
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}
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}
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return data.slice(0, eof);
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}
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function attemptSetEstimatedReleaseDate(fileEntry) {
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// :TODO: yearEstPatterns RegExp's should be cached - we can do this @ Config (re)load time
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const patterns = Config.fileBase.yearEstPatterns.map( p => new RegExp(p, 'gmi'));
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function getMatch(input) {
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if(input) {
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let m;
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for(let i = 0; i < patterns.length; ++i) {
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m = patterns[i].exec(input);
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if(m) {
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return m;
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}
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}
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}
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}
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//
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// We attempt deteciton in short -> long order
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//
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const match = getMatch(fileEntry.desc) || getMatch(fileEntry.descLong);
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if(match && match[1]) {
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let year;
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if(2 === match[1].length) {
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year = parseInt(match[1]);
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if(year) {
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if(year > 70) {
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year += 1900;
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} else {
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year += 2000;
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}
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}
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} else {
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year = parseInt(match[1]);
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}
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if(year) {
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fileEntry.meta.est_release_year = year;
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}
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}
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}
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function populateFileEntryWithArchive(fileEntry, filePath, stepInfo, iterator, cb) {
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const archiveUtil = ArchiveUtil.getInstance();
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const archiveType = fileEntry.meta.archive_type; // we set this previous to populateFileEntryWithArchive()
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async.waterfall(
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[
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function getArchiveFileList(callback) {
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stepInfo.step = 'archive_list_start';
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iterator(err => {
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if(err) {
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return callback(err);
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}
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archiveUtil.listEntries(filePath, archiveType, (err, entries) => {
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if(err) {
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stepInfo.step = 'archive_list_failed';
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} else {
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stepInfo.step = 'archive_list_finish';
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stepInfo.archiveEntries = entries || [];
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}
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iterator(iterErr => {
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return callback( iterErr, entries || [] ); // ignore original |err| here
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});
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});
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});
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},
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function processDescFilesStart(entries, callback) {
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stepInfo.step = 'desc_files_start';
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iterator(err => {
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return callback(err, entries);
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});
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},
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function extractDescFiles(entries, callback) {
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// :TODO: would be nice if these RegExp's were cached
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// :TODO: this is long winded...
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const extractList = [];
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const shortDescFile = entries.find( e => {
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return Config.fileBase.fileNamePatterns.shortDesc.find( pat => new RegExp(pat, 'i').test(e.fileName) );
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});
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if(shortDescFile) {
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extractList.push(shortDescFile.fileName);
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}
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const longDescFile = entries.find( e => {
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return Config.fileBase.fileNamePatterns.longDesc.find( pat => new RegExp(pat, 'i').test(e.fileName) );
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});
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if(longDescFile) {
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extractList.push(longDescFile.fileName);
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}
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if(0 === extractList.length) {
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return callback(null, [] );
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}
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temp.mkdir('enigextract-', (err, tempDir) => {
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if(err) {
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return callback(err);
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}
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archiveUtil.extractTo(filePath, tempDir, archiveType, extractList, err => {
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if(err) {
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return callback(err);
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}
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const descFiles = {
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desc : shortDescFile ? paths.join(tempDir, shortDescFile.fileName) : null,
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descLong : longDescFile ? paths.join(tempDir, longDescFile.fileName) : null,
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};
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return callback(null, descFiles);
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});
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});
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},
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function readDescFiles(descFiles, callback) {
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// :TODO: we shoudl probably omit files that are too large
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async.each(Object.keys(descFiles), (descType, next) => {
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const path = descFiles[descType];
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if(!path) {
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return next(null);
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}
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fs.readFile(path, (err, data) => {
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if(err || !data) {
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return next(null);
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}
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//
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// Assume FILE_ID.DIZ, NFO files, etc. are CP437.
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//
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// :TODO: This isn't really always the case - how to handle this? We could do a quick detection...
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fileEntry[descType] = iconv.decode(sliceAtSauceMarker(data, 0x1a), 'cp437');
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return next(null);
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});
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}, () => {
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// cleanup, but don't wait...
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/*
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:TODO: fix global temp cleanup issue!!!
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temp.cleanup( err => {
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// :TODO: Log me!
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});*/
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return callback(null);
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});
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},
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function attemptReleaseYearEstimation(callback) {
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attemptSetEstimatedReleaseDate(fileEntry);
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return callback(null);
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},
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function processDescFilesFinish(callback) {
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stepInfo.step = 'desc_files_finish';
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return iterator(callback);
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},
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],
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err => {
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return cb(err);
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}
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);
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}
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function populateFileEntryNonArchive(fileEntry, filePath, stepInfo, iterator, cb) {
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// :TODO: implement me!
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return cb(null);
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}
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function addNewFileEntry(fileEntry, filePath, cb) {
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// :TODO: Use detectTypeWithBuf() once avail - we *just* read some file data
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async.series(
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[
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function addNewDbRecord(callback) {
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return fileEntry.persist(callback);
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}
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],
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err => {
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return cb(err);
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}
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);
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}
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function updateFileEntry(fileEntry, filePath, cb) {
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}
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const HASH_NAMES = [ 'sha1', 'sha256', 'md5', 'crc32' ];
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function scanFile(filePath, options, iterator, cb) {
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if(3 === arguments.length && _.isFunction(iterator)) {
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cb = iterator;
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iterator = null;
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} else if(2 === arguments.length && _.isFunction(options)) {
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cb = options;
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iterator = null;
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options = {};
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}
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const fileEntry = new FileEntry({
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areaTag : options.areaTag,
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meta : options.meta,
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hashTags : options.hashTags, // Set() or Array
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fileName : paths.basename(filePath),
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storageTag : options.storageTag,
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});
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const stepInfo = {
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filePath : filePath,
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fileName : paths.basename(filePath),
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};
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function callIter(next) {
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if(iterator) {
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return iterator(stepInfo, next);
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} else {
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return next(null);
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}
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}
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function readErrorCallIter(origError, next) {
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stepInfo.step = 'read_error';
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stepInfo.error = origError.message;
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callIter( () => {
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return next(origError);
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});
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}
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let lastCalcHashPercent;
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async.waterfall(
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[
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function startScan(callback) {
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fs.stat(filePath, (err, stats) => {
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if(err) {
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return readErrorCallIter(err, callback);
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}
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stepInfo.step = 'start';
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stepInfo.byteSize = fileEntry.meta.byte_size = stats.size;
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return callIter(callback);
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});
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},
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function processPhysicalFileGeneric(callback) {
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stepInfo.bytesProcessed = 0;
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const hashes = {
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sha1 : crypto.createHash('sha1'),
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sha256 : crypto.createHash('sha256'),
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md5 : crypto.createHash('md5'),
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crc32 : new CRC32(),
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};
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const stream = fs.createReadStream(filePath);
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function updateHashes(data) {
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async.each( HASH_NAMES, (hashName, nextHash) => {
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hashes[hashName].update(data);
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return nextHash(null);
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}, () => {
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return stream.resume();
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});
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}
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stream.on('data', data => {
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stream.pause(); // until iterator compeltes
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stepInfo.bytesProcessed += data.length;
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stepInfo.calcHashPercent = Math.round(((stepInfo.bytesProcessed / stepInfo.byteSize) * 100));
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//
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// Only send 'hash_update' step update if we have a noticable percentage change in progress
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//
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if(stepInfo.calcHashPercent === lastCalcHashPercent) {
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updateHashes(data);
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} else {
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lastCalcHashPercent = stepInfo.calcHashPercent;
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stepInfo.step = 'hash_update';
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callIter(err => {
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if(err) {
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stream.destroy(); // cancel read
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return callback(err);
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}
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updateHashes(data);
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});
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}
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});
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stream.on('end', () => {
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fileEntry.meta.byte_size = stepInfo.bytesProcessed;
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async.each(HASH_NAMES, (hashName, nextHash) => {
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if('sha256' === hashName) {
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stepInfo.sha256 = fileEntry.fileSha256 = hashes.sha256.digest('hex');
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} else if('sha1' === hashName || 'md5' === hashName) {
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stepInfo[hashName] = fileEntry.meta[`file_${hashName}`] = hashes[hashName].digest('hex');
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} else if('crc32' === hashName) {
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stepInfo.crc32 = fileEntry.meta.crc32 = hashes.crc32.finalize().toString(16);
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}
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return nextHash(null);
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}, () => {
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stepInfo.step = 'hash_finish';
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return callIter(callback);
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});
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});
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stream.on('error', err => {
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return readErrorCallIter(err, callback);
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});
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},
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function processPhysicalFileByType(callback) {
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const archiveUtil = ArchiveUtil.getInstance();
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archiveUtil.detectType(filePath, (err, archiveType) => {
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if(archiveType) {
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// save this off
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fileEntry.meta.archive_type = archiveType;
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populateFileEntryWithArchive(fileEntry, filePath, stepInfo, callIter, err => {
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if(err) {
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populateFileEntryNonArchive(fileEntry, filePath, stepInfo, callIter, err => {
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// :TODO: log err
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return callback(null); // ignore err
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});
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} else {
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return callback(null);
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}
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});
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} else {
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populateFileEntryNonArchive(fileEntry, filePath, stepInfo, callIter, err => {
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// :TODO: log err
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return callback(null); // ignore err
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});
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}
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});
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},
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function fetchExistingEntry(callback) {
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getExistingFileEntriesBySha256(fileEntry.fileSha256, (err, dupeEntries) => {
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return callback(err, dupeEntries);
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});
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}
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],
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(err, dupeEntries) => {
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if(err) {
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return cb(err);
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}
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return cb(null, fileEntry, dupeEntries);
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}
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);
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}
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function scanFileAreaForChanges(areaInfo, cb) {
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const storageLocations = getAreaStorageLocations(areaInfo);
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|
|
async.eachSeries(storageLocations, (storageLoc, nextLocation) => {
|
|
async.series(
|
|
[
|
|
function scanPhysFiles(callback) {
|
|
const physDir = storageLoc.dir;
|
|
|
|
fs.readdir(physDir, (err, files) => {
|
|
if(err) {
|
|
return callback(err);
|
|
}
|
|
|
|
async.eachSeries(files, (fileName, nextFile) => {
|
|
const fullPath = paths.join(physDir, fileName);
|
|
|
|
fs.stat(fullPath, (err, stats) => {
|
|
if(err) {
|
|
// :TODO: Log me!
|
|
return nextFile(null); // always try next file
|
|
}
|
|
|
|
if(!stats.isFile()) {
|
|
return nextFile(null);
|
|
}
|
|
|
|
scanFile(
|
|
fullPath,
|
|
{
|
|
areaTag : areaInfo.areaTag,
|
|
storageTag : storageLoc.storageTag
|
|
},
|
|
(err, fileEntry, dupeEntries) => {
|
|
if(err) {
|
|
// :TODO: Log me!!!
|
|
return nextFile(null); // try next anyway
|
|
}
|
|
|
|
if(dupeEntries.length > 0) {
|
|
// :TODO: Handle duplidates -- what to do here???
|
|
} else {
|
|
addNewFileEntry(fileEntry, fullPath, err => {
|
|
// pass along error; we failed to insert a record in our DB or something else bad
|
|
return nextFile(err);
|
|
});
|
|
}
|
|
}
|
|
);
|
|
});
|
|
}, err => {
|
|
return callback(err);
|
|
});
|
|
});
|
|
},
|
|
function scanDbEntries(callback) {
|
|
// :TODO: Look @ db entries for area that were *not* processed above
|
|
return callback(null);
|
|
}
|
|
],
|
|
err => {
|
|
return nextLocation(err);
|
|
}
|
|
);
|
|
},
|
|
err => {
|
|
return cb(err);
|
|
});
|
|
}
|