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/*
* Copyright 2017 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Private
var fs = require('fs');
var debug = false;
function getFileName(id, sizeCut) {
if (debug) console.log('getFileName', id)
var a = [];
for (var i = 0; i < id.length; i += sizeCut)
a.push(id.substring(i, i + sizeCut));
return a;
}
//Public
module.exports = dbFile;
module.exports.deleteFolderRecursive = deleteFolderRecursive;
function dbFile(d, cut) {
if (debug) console.log('new dbFile', d);
if (d === undefined) {
console.error('Files - Missing directory to setup db');
return;
}
this.rootDir = d;
this.sizeCut = 4;
if (cut !== undefined) this.sizeCut = cut;
if (!fs.existsSync(d))
fs.mkdirSync(d);
return null;
}
dbFile.prototype.existsSync = function existsSync(id) {
if (debug) console.log('existsSync', id)
var n = getFileName(id, this.sizeCut);
var d = this.rootDir;
for (var i in n) {
d += '/' + n[i];
if (i == (n.length - 1)) d += '.json';
}
if (debug) console.log('existsSync checking', d)
if (!fs.existsSync(d)) return false;
return true;
}
dbFile.prototype.readSync = function readSync(id) {
if (debug) console.log('readSync', id)
var n = getFileName(id, this.sizeCut);
var d = this.rootDir;
for (var i in n) {
d += '/' + n[i];
if (i == (n.length - 1)) d += '.json';
}
if (debug) console.log('readSync checking', d)
if (!fs.existsSync(d))
return undefined;
return JSON.parse(fs.readFileSync(d));
}
dbFile.prototype.getReadStream = function getReadStream(id) {
if (debug) console.log('getReadStream', id)
var n = getFileName(id, this.sizeCut);
var d = this.rootDir;
for (var i in n) {
d += '/' + n[i];
if (i == (n.length - 1)) d += '.json';
}
if (debug) console.log('getReadStream checking', d)
return fs.createReadStream(d);
}
dbFile.prototype.writeSync = function writeSync(id, o) {
if (debug) console.log('writeSync', id)
var n = getFileName(id, this.sizeCut);
var d = this.rootDir;
for (var i in n) {
d += '/' + n[i];
if (i == (n.length - 1)) d += '.json';
else
if (!fs.existsSync(d)) {
if (debug) console.log('writeSync create dir', d)
fs.mkdirSync(d);
}
}
if (debug) console.log('writeSync create file', d)
fs.writeFileSync(d, JSON.stringify(o));
}
dbFile.prototype.deleteSync = function deleteSync(id) {
if (debug) console.log('deleteSync', id)
var n = getFileName(id, this.sizeCut);
var rdir = this.rootDir;
var pdir = this.rootDir;
function recurseDelete(index) {
var d = rdir;
var p = pdir;
for (var i = 0; i < index; i++) {
d += '/' + n[i];
if (i == (n.length - 1)) d += '.json';
else p += '/' + n[i];
}
if (index === n.length) {
if (debug) console.log('deleting file', d)
fs.unlinkSync(d);
recurseDelete(index - 1);
} else {
if (index === 0) return;
var f = fs.readdirSync(p);
if (debug) console.log('content of', p, f);
if (f.length === 0) {
if (debug) console.log('deleting dir', p)
fs.rmdirSync(p);
recurseDelete(index - 1);
}
}
}
recurseDelete(n.length);
}
function deleteFolderRecursive(path) {
if (fs.existsSync(path)) {
fs.readdirSync(path).forEach(function(file, index) {
var curPath = path + "/" + file;
if (fs.lstatSync(curPath).isDirectory()) { // recurse
deleteFolderRecursive(curPath);
} else { // delete file
fs.unlinkSync(curPath);
}
});
fs.rmdirSync(path);
}
};
dbFile.prototype.deleteSyncAll = function deleteSyncAll() {
deleteFolderRecursive(this.rootDir);
}
dbFile.prototype.getIds = function getIds() {
if (debug) console.log('getIds')
var ids = [];
function find(dir, id) {
var files = fs.readdirSync(dir);
for (var i in files) {
if (debug) console.log('getIds', 'Looking to', dir, id, files[i])
if (fs.existsSync(dir + '/' + files[i])) {
var name = dir + '/' + files[i];
var nid = id + files[i];
if (fs.existsSync(name)) {
if (fs.statSync(name).isDirectory()) {
find(name, nid);
} else {
ids.push(nid.substring(0, nid.length - 5));
}
}
}
}
}
find(this.rootDir, '');
return ids;
}
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