376 lines
11 KiB
JavaScript
376 lines
11 KiB
JavaScript
/**
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* Copyright 2013-2017 Zaid Abdulla
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*
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* This file is part of GenieACS.
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*
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* GenieACS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* GenieACS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with GenieACS. If not, see <http://www.gnu.org/licenses/>.
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*/
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"use strict";
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const common = require('./common');
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const CHANGE_FLAGS = {
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object: 2,
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writable: 4,
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value: 8
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};
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function sanitizeParameterValue(parameterValue) {
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if (parameterValue[0] != null) {
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switch (parameterValue[1]) {
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case 'xsd:boolean':
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if (typeof parameterValue[0] !== 'boolean') {
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parameterValue[0] = !!JSON.parse(parameterValue[0]);
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}
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break;
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case 'xsd:string':
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if (typeof parameterValue[0] !== 'string') {
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parameterValue[0] = '' + parameterValue[0];
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}
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break;
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case 'xsd:int':
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case 'xsd:unsignedInt':
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if (typeof parameterValue[0] !== 'number') {
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parameterValue[0] = +parameterValue[0];
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}
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break;
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case 'xsd:dateTime':
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if (typeof parameterValue[0] !== 'number') {
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let v = +parameterValue[0];
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if (isNaN(v)) {
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v = Date.parse(parameterValue[0]);
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if (isNaN(v))
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v = '' + parameterValue[0];
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}
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parameterValue[0] = v;
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}
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break;
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default:
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if (parameterValue[1] != null)
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throw new Error(`Parameter value type "${parameterValue[1]}" not recognized.`);
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parameterValue[0] = JSON.parse(JSON.stringify(parameterValue[0]));
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break;
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}
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}
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return parameterValue;
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}
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function getAliasDeclarations(path, timestamp) {
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var decs = [];
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function recursive(pattern, prefix) {
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var pattern = prefix.concat(pattern);
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for (let i = prefix.length; i < pattern.length; ++ i) {
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if (Array.isArray(pattern[i])) {
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let pat = pattern[i];
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pattern[i] = '*';
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for (let j = 0; j < pat.length; j += 2)
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recursive(pat[j], pattern.slice(0, i + 1));
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}
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}
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if (prefix.length)
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decs.push([pattern, timestamp, {value: timestamp}]);
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else
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decs.push([pattern, timestamp]);
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}
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recursive(path, []);
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return decs;
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}
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function unpack(deviceData, path, revision) {
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let allMatches = [];
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if (!path.alias) {
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for (let p of deviceData.paths.find(path, false, true))
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if (deviceData.attributes.has(p, revision))
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allMatches.push(p);
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}
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else {
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let wildcardPath = path.slice();
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wildcardPath.wildcard = path.wildcard;
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for (let i = 0; i < wildcardPath.length; ++ i)
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if (Array.isArray(wildcardPath[i])) {
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wildcardPath[i] = '*';
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wildcardPath.wildcard |= 1 << i;
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}
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for (let p of deviceData.paths.find(wildcardPath, false, true))
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if (deviceData.attributes.has(p, revision))
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allMatches.push(p);
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for (let i = path.length - 1; i >= 0; -- i) {
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if (Array.isArray(path[i])) {
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for (let j = 0; j < path[i].length; j += 2) {
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let p = wildcardPath.slice(0, i + 1).concat(path[i][j]);
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p.alias = (wildcardPath.alias & ((1 << (i + 1)) - 1)) + path[i][j].alias << (i + 1);
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p.wildcard = (wildcardPath.wildcard & ((1 << (i + 1)) - 1)) + path[i][j].wildcard << (i + 1);
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let unpacked = unpack(deviceData, p, revision);
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let filtered = [];
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for (let up of unpacked) {
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let attributes = deviceData.attributes.get(up, revision);
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if (attributes && attributes.value && attributes.value[1] &&
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sanitizeParameterValue([path[i][j + 1], attributes.value[1][1]])[0] === attributes.value[1][0]) {
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for (let m = 0; m < allMatches.length; ++ m) {
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let k;
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for (k = i; k >= 0; -- k)
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if (allMatches[m][k] != up[k])
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break
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if (k < 0) {
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filtered.push(allMatches[m]);
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allMatches[m] = [];
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}
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}
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}
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}
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allMatches = filtered;
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}
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}
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}
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}
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allMatches.sort(function(a, b) {
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for (let i = 0; i < a.length; ++ i) {
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if (a === b)
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continue;
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// Use numeric sorting for numbers
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let ia = parseInt(a), ib = parseInt(b);
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if (ia.toString() === a && ib.toString() === b) {
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a = ia;
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b = ib;
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}
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if (a < b)
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return -1;
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else
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return 1;
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}
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return 0;
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});
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return allMatches;
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}
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function clear(deviceData, path, timestamp, attributes, changeFlags = 0) {
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let changeTrackers = {};
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timestamp = timestamp || 0;
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let descendantsTimestamp = timestamp;
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if (attributes && attributes.object) {
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if (attributes.object > descendantsTimestamp)
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descendantsTimestamp = attributes.object;
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if (!(attributes.object <= attributes.value))
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attributes.value = attributes.object;
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}
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for (let p of deviceData.paths.find(path, true, true, descendantsTimestamp ? 99 : path.length)) {
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let tracker = deviceData.trackers.get(p);
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for (let k in tracker)
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changeTrackers[k] |= tracker[k];
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let currentTimestamp = deviceData.timestamps.get(p);
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if (currentTimestamp === undefined)
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continue;
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if (timestamp > currentTimestamp ||
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(descendantsTimestamp > currentTimestamp && p.length > path.length)) {
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deviceData.timestamps.delete(p);
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deviceData.attributes.delete(p);
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changeFlags |= 1;
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}
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else if (attributes && p.length == path.length) {
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let currentAttributes = deviceData.attributes.get(p);
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if (currentAttributes) {
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let newAttrs;
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for (let attrName in attributes) {
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if (attrName in currentAttributes &&
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attributes[attrName] > currentAttributes[attrName][0]) {
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changeFlags |= CHANGE_FLAGS[attrName];
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if (!newAttrs) {
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newAttrs = Object.assign({}, currentAttributes);
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deviceData.attributes.set(p, newAttrs);
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}
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delete newAttrs[attrName];
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}
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}
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}
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}
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}
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// Note: For performance, we're merging all changes together rather than
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// mark changes based the exact parameters affected.
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for (let k in changeTrackers) {
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if (changeTrackers[k] & changeFlags)
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deviceData.changes.add(k);
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}
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}
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function compareEquality(a, b) {
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var t = typeof a;
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if (a === null ||
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a === undefined ||
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t === 'number' ||
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t === 'boolean' ||
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t === 'string' ||
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t === 'symbol')
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return a === b;
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return JSON.stringify(a) === JSON.stringify(b);
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}
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function set(deviceData, path, timestamp, attributes, toClear) {
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path = deviceData.paths.add(path);
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let currentTimestamp = deviceData.timestamps.get(path);
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let currentAttributes;
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if (path.wildcard)
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attributes = undefined;
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else if (currentTimestamp)
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currentAttributes = deviceData.attributes.get(path);
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let changeFlags = 0;
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if (attributes) {
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if (attributes.value && attributes.value[1]
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&& attributes.value[0] >= (attributes.object ? attributes.object[0] : 0))
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attributes.object = [attributes.value[0], 0];
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if (attributes.object && attributes.object[1]
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&& attributes.object[0] >= (attributes.value ? attributes.value[0] : 0))
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attributes.value = [attributes.object[0]];
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let newAttributes = Object.assign({}, currentAttributes, attributes);
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if (currentAttributes) {
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for (let attrName in attributes) {
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timestamp = Math.max(timestamp, attributes[attrName][0]);
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if (!(attrName in currentAttributes))
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changeFlags |= CHANGE_FLAGS[attrName];
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else if (attributes[attrName][0] <= currentAttributes[attrName][0])
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newAttributes[attrName] = currentAttributes[attrName];
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else if (!compareEquality(attributes[attrName][1], currentAttributes[attrName][1]))
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changeFlags |= CHANGE_FLAGS[attrName];
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}
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}
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else
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changeFlags |= 1;
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deviceData.attributes.set(path, newAttributes);
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if (!(timestamp <= currentTimestamp)) {
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deviceData.timestamps.set(path, timestamp);
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if (path.length > 1)
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toClear = set(deviceData, path.slice(0, path.length - 1), timestamp,
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{object: [timestamp, 1]}, toClear);
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}
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}
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else if (!(timestamp <= currentTimestamp)) {
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deviceData.timestamps.set(path, timestamp);
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if (currentAttributes) {
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deviceData.attributes.delete(path);
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changeFlags |= 1;
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}
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else if (path.wildcard) {
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for (let p of deviceData.paths.find(path, false, true, path.length))
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if (timestamp > deviceData.timestamps.get(p)) {
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toClear = toClear || [];
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toClear.push([p, timestamp]);
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}
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}
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}
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if (changeFlags) {
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if (changeFlags & 1) {
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toClear = toClear || [];
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toClear.push([path, timestamp, null, changeFlags]);
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}
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else if (changeFlags & CHANGE_FLAGS.object) {
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toClear = toClear || [];
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toClear.push([path, 0, {object: attributes.object[0]}, changeFlags]);
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}
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else {
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for (let p of deviceData.paths.find(path, true, false, path.length)) {
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let tracker = deviceData.trackers.get(p);
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for (let k in tracker) {
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if (tracker[k] & changeFlags)
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deviceData.changes.add(k);
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}
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}
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}
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}
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return toClear;
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}
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function track(deviceData, path, marker, attributes) {
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path = deviceData.paths.add(path);
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let f = 1;
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if (attributes)
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for (let attrName of attributes)
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f |= CHANGE_FLAGS[attrName];
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let cur = deviceData.trackers.get(path);
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if (!cur) {
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cur = {};
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deviceData.trackers.set(path, cur);
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}
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cur[marker] |= f;
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}
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function clearTrackers(deviceData, tracker) {
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if (Array.isArray(tracker)) {
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deviceData.trackers.forEach(function(v, k) {
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for (let t of tracker)
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delete v[t];
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});
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for (let t of tracker)
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deviceData.changes.delete(t);
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}
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else {
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deviceData.trackers.forEach(function(v, k) {
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delete v[tracker];
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});
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deviceData.changes.delete(tracker);
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}
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}
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exports.sanitizeParameterValue = sanitizeParameterValue;
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exports.getAliasDeclarations = getAliasDeclarations;
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exports.unpack = unpack;
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exports.set = set;
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exports.clear = clear;
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exports.track = track;
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exports.clearTrackers = clearTrackers;
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