405 lines
13 KiB
JavaScript
405 lines
13 KiB
JavaScript
'use strict';
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angular.module('ffffng')
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.service('NodeService', function (
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config,
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_,
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async,
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crypto,
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fs,
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glob,
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Logger,
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MailService,
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Strings,
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ErrorTypes,
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UrlBuilder
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) {
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var MAX_PARALLEL_NODES_PARSING = 10;
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var linePrefixes = {
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hostname: '# Knotenname: ',
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nickname: '# Ansprechpartner: ',
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email: '# Kontakt: ',
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coords: '# Koordinaten: ',
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mac: '# MAC: ',
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token: '# Token: ',
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monitoring: '# Monitoring: ',
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monitoringToken: '# Monitoring-Token: '
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};
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var filenameParts = ['hostname', 'mac', 'key', 'token', 'monitoringToken'];
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function generateToken() {
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return crypto.randomBytes(8).toString('hex');
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}
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function findNodeFiles(filter) {
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var pattern = _.join(
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_.map(filenameParts, function (field) {
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return filter.hasOwnProperty(field) ? filter[field] : '*';
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}),
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'@'
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);
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return glob.sync(config.server.peersPath + '/' + pattern.toLowerCase());
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}
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function parseNodeFilename(filename) {
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var parts = _.split(filename, '@', filenameParts.length);
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var parsed = {};
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_.each(_.zip(filenameParts, parts), function (part) {
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parsed[part[0]] = part[1];
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});
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return parsed;
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}
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function isDuplicate(filter, token) {
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var files = findNodeFiles(filter);
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if (files.length === 0) {
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return false;
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}
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if (files.length > 1 || !token /* node is being created*/) {
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return true;
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}
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return parseNodeFilename(files[0]).token !== token;
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}
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function checkNoDuplicates(token, node, nodeSecrets) {
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if (isDuplicate({ hostname: node.hostname }, token)) {
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return {data: {msg: 'Already exists.', field: 'hostname'}, type: ErrorTypes.conflict};
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}
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if (node.key) {
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if (isDuplicate({ key: node.key }, token)) {
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return {data: {msg: 'Already exists.', field: 'key'}, type: ErrorTypes.conflict};
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}
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}
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if (isDuplicate({ mac: node.mac }, token)) {
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return {data: {msg: 'Already exists.', field: 'mac'}, type: ErrorTypes.conflict};
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}
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if (nodeSecrets.monitoringToken && isDuplicate({ monitoringToken: nodeSecrets.monitoringToken }, token)) {
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return {data: {msg: 'Already exists.', field: 'monitoringToken'}, type: ErrorTypes.conflict};
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}
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return null;
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}
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function writeNodeFile(isUpdate, token, node, nodeSecrets, callback) {
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var filename =
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config.server.peersPath + '/' +
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(
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node.hostname + '@' +
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node.mac + '@' +
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(node.key || '') + '@' +
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token + '@' +
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nodeSecrets.monitoringToken
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).toLowerCase();
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var data = '';
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_.each(linePrefixes, function (prefix, key) {
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var value;
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switch (key) {
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case 'monitoring':
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if (node.monitoring && node.monitoringConfirmed) {
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value = 'aktiv';
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} else if (node.monitoring && !node.monitoringConfirmed) {
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value = 'pending';
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} else {
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value = '';
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}
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break;
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case 'monitoringToken':
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value = nodeSecrets.monitoringToken || '';
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break;
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default:
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value = key === 'token' ? token : node[key];
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if (_.isUndefined(value)) {
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value = _.isUndefined(nodeSecrets[key]) ? '' : nodeSecrets[key];
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}
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break;
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}
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data += prefix + value + '\n';
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});
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if (node.key) {
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data += 'key "' + node.key + '";\n';
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}
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// since node.js is single threaded we don't need a lock
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var error;
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if (isUpdate) {
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var files = findNodeFiles({ token: token });
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if (files.length !== 1) {
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return callback({data: 'Node not found.', type: ErrorTypes.notFound});
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}
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error = checkNoDuplicates(token, node, nodeSecrets);
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if (error) {
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return callback(error);
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}
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var file = files[0];
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try {
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fs.unlinkSync(file);
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}
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catch (error) {
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Logger.tag('node', 'save').error('Could not delete old node file: ' + file, error);
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return callback({data: 'Could not remove old node data.', type: ErrorTypes.internalError});
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}
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} else {
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error = checkNoDuplicates(null, node, nodeSecrets);
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if (error) {
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return callback(error);
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}
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}
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try {
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fs.writeFileSync(filename, data, 'utf8');
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}
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catch (error) {
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Logger.tag('node', 'save').error('Could not write node file: ' + filename, error);
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return callback({data: 'Could not write node data.', type: ErrorTypes.internalError});
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}
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return callback(null, token, node);
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}
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function deleteNodeFile(token, callback) {
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var files = findNodeFiles({ token: token });
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if (files.length !== 1) {
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return callback({data: 'Node not found.', type: ErrorTypes.notFound});
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}
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try {
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fs.unlinkSync(files[0]);
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}
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catch (error) {
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Logger.tag('node', 'delete').error('Could not delete node file: ' + file, error);
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return callback({data: 'Could not delete node.', type: ErrorTypes.internalError});
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}
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return callback(null);
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}
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function parseNodeFile(file, callback) {
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var lines = fs.readFileSync(file).toString();
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var node = {};
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var nodeSecrets = {};
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_.each(lines.split('\n'), function (line) {
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var entries = {};
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for (var key in linePrefixes) {
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if (linePrefixes.hasOwnProperty(key)) {
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var prefix = linePrefixes[key];
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if (line.substring(0, prefix.length) === prefix) {
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entries[key] = Strings.normalizeString(line.substr(prefix.length));
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break;
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}
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}
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}
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if (_.isEmpty(entries) && line.substring(0, 5) === 'key "') {
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entries.key = Strings.normalizeString(line.split('"')[1]);
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}
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_.each(entries, function (value, key) {
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if (key === 'monitoring') {
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var active = value === 'aktiv';
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var pending = value === 'pending';
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node.monitoring = active || pending;
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node.monitoringConfirmed = active;
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node.monitoringState = active ? 'active' : (pending ? 'pending' : '');
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} else if (key === 'monitoringToken') {
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nodeSecrets.monitoringToken = value;
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} else {
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node[key] = value;
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}
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});
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});
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callback(null, node, nodeSecrets);
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}
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function findNodeDataByFilePattern(filter, callback) {
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var files = findNodeFiles(filter);
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if (files.length !== 1) {
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return callback(null);
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}
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var file = files[0];
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return parseNodeFile(file, callback);
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}
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function getNodeDataByFilePattern(filter, callback) {
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findNodeDataByFilePattern(filter, function (err, node, nodeSecrets) {
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if (err) {
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return callback(err);
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}
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if (!node) {
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return callback({data: 'Node not found.', type: ErrorTypes.notFound});
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}
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callback(null, node, nodeSecrets);
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});
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}
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function sendMonitoringConfirmationMail(node, nodeSecrets, callback) {
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var confirmUrl = UrlBuilder.monitoringConfirmUrl(nodeSecrets);
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var disableUrl = UrlBuilder.monitoringDisableUrl(nodeSecrets);
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MailService.enqueue(
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config.server.email.from,
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node.nickname + ' <' + node.email + '>',
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'monitoring-confirmation',
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{
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node: node,
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confirmUrl: confirmUrl,
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disableUrl: disableUrl
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},
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function (err) {
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if (err) {
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Logger.tag('monitoring', 'confirmation').error('Could not enqueue confirmation mail.', error);
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return callback({data: 'Internal error.', type: ErrorTypes.internalError});
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}
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callback(null);
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}
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);
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}
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return {
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createNode: function (node, callback) {
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var token = generateToken();
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var nodeSecrets = {};
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node.monitoringConfirmed = false;
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if (node.monitoring) {
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nodeSecrets.monitoringToken = generateToken();
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}
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writeNodeFile(false, token, node, nodeSecrets, function (err, token, node) {
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if (err) {
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return callback(err);
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}
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if (node.monitoring && !node.monitoringConfirmed) {
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return sendMonitoringConfirmationMail(node, nodeSecrets, function (err) {
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if (err) {
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return callback(err);
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}
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return callback(null, token, node);
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});
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}
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return callback(null, token, node);
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});
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},
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updateNode: function (token, node, callback) {
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this.getNodeDataByToken(token, function (err, currentNode, nodeSecrets) {
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if (err) {
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return callback(err);
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}
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var monitoringConfirmed = false;
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var monitoringToken = '';
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if (node.monitoring) {
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if (!currentNode.monitoring) {
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// monitoring just has been enabled
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monitoringConfirmed = false;
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monitoringToken = generateToken();
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} else {
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// monitoring is still enabled
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if (currentNode.email != node.email) {
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// new email so we need a new token and a reconfirmation
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monitoringConfirmed = false;
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monitoringToken = generateToken();
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} else {
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// email unchanged, keep token (fix if not set) and confirmation state
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monitoringConfirmed = currentNode.monitoringConfirmed;
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monitoringToken = nodeSecrets.monitoringToken || generateToken();
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}
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}
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}
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node.monitoringConfirmed = monitoringConfirmed;
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nodeSecrets.monitoringToken = monitoringToken;
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writeNodeFile(true, token, node, nodeSecrets, function (err, token, node) {
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if (err) {
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return callback(err);
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}
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if (node.monitoring && !node.monitoringConfirmed) {
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return sendMonitoringConfirmationMail(node, nodeSecrets, function (err) {
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if (err) {
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return callback(err);
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}
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return callback(null, token, node);
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});
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}
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return callback(null, token, node);
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});
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});
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},
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internalUpdateNode: function (token, node, nodeSecrets, callback) {
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writeNodeFile(true, token, node, nodeSecrets, callback);
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},
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deleteNode: function (token, callback) {
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deleteNodeFile(token, callback);
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},
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getAllNodes: function (callback) {
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var files = findNodeFiles({});
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var total = files.length;
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async.mapLimit(
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files,
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MAX_PARALLEL_NODES_PARSING,
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parseNodeFile,
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function (err, nodes) {
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if (err) {
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Logger.tag('nodes').error('Error getting all nodes:', error);
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return callback({data: 'Internal error.', type: ErrorTypes.internalError});
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}
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return callback(null, nodes, total);
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}
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);
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},
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findNodeDataByMac: function (mac, callback) {
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return findNodeDataByFilePattern({ mac: mac }, callback);
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},
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getNodeDataByToken: function (token, callback) {
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return getNodeDataByFilePattern({ token: token }, callback);
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},
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getNodeDataByMonitoringToken: function (monitoringToken, callback) {
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return getNodeDataByFilePattern({ monitoringToken: monitoringToken }, callback);
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}
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};
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});
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