81 lines
2.6 KiB
JavaScript
81 lines
2.6 KiB
JavaScript
/**
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* Copyright 2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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"use strict";
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var reconnect = RED.settings.sqliteReconnectTime || 20000;
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var sqlite3 = require('sqlite3');
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function SqliteNodeDB(n) {
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RED.nodes.createNode(this,n);
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this.dbname = n.db;
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var node = this;
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node.doConnect = function() {
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node.db = new sqlite3.Database(node.dbname);
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node.db.on('open',function(err) {
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if (node.tick) { clearTimeout(node.tick); }
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node.log("opened "+node.dbname+" ok");
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});
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node.db.on('error', function(err) {
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node.warn(err);
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node.log("failed to open "+node.dbname);
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node.tick = setTimeout(doConnect, reconnect);
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});
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}
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node.on('close', function () {
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if (node.tick) { clearTimeout(node.tick); }
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if (node.db) { node.db.close(); }
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});
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}
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RED.nodes.registerType("sqlitedb",SqliteNodeDB);
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function SqliteNodeIn(n) {
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RED.nodes.createNode(this,n);
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this.mydb = n.mydb;
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this.mydbConfig = RED.nodes.getNode(this.mydb);
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if (this.mydbConfig) {
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this.mydbConfig.doConnect();
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var node = this;
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node.on("input", function(msg) {
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if (typeof msg.topic === 'string') {
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//console.log("query:",msg.topic);
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node.mydbConfig.db.all(msg.topic, function(err, row) {
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if (err) { node.warn(err); }
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else {
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msg.payload = row;
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node.send(msg);
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}
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});
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}
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else {
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if (typeof msg.topic !== 'string') {
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node.error("msg.topic : the query is not defined as a string");
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}
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}
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});
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}
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else {
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this.error("Sqlite database not configured");
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}
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}
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RED.nodes.registerType("sqlite",SqliteNodeIn);
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}
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