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node-red-nodes/storage/sqlite/sqlite.js
2018-12-19 19:37:13 +00:00

151 lines
6.3 KiB
JavaScript

module.exports = function(RED) {
"use strict";
var reconnect = RED.settings.sqliteReconnectTime || 20000;
var sqlite3 = require('sqlite3');
function SqliteNodeDB(n) {
RED.nodes.createNode(this,n);
this.dbname = n.db;
this.mod = n.mode;
if (n.mode === "RWC") { this.mode = sqlite3.OPEN_READWRITE | sqlite3.OPEN_CREATE; }
if (n.mode === "RW") { this.mode = sqlite3.OPEN_READWRITE; }
if (n.mode === "RO") { this.mode = sqlite3.OPEN_READONLY; }
var node = this;
node.doConnect = function() {
node.db = node.db || new sqlite3.Database(node.dbname,node.mode);
node.db.on('open', function() {
if (node.tick) { clearTimeout(node.tick); }
node.log("opened "+node.dbname+" ok");
});
node.db.on('error', function(err) {
node.error("failed to open "+node.dbname, err);
node.tick = setTimeout(function() { node.doConnect(); }, reconnect);
});
}
node.on('close', function (done) {
if (node.tick) { clearTimeout(node.tick); }
if (node.db) { node.db.close(done()); }
else { done(); }
});
}
RED.nodes.registerType("sqlitedb",SqliteNodeDB);
function SqliteNodeIn(n) {
RED.nodes.createNode(this,n);
this.mydb = n.mydb;
this.sqlquery = n.sqlquery||"msg.topic";
this.sql = n.sql;
this.mydbConfig = RED.nodes.getNode(this.mydb);
var node = this;
node.status({});
if (node.mydbConfig) {
node.mydbConfig.doConnect();
node.status({fill:"green",shape:"dot",text:this.mydbConfig.mod});
var bind = [];
var doQuery = function(msg) {
if (node.sqlquery == "msg.topic"){
if (typeof msg.topic === 'string') {
if (msg.topic.length > 0) {
bind = Array.isArray(msg.payload) ? msg.payload : [];
node.mydbConfig.db.all(msg.topic, bind, function(err, row) {
if (err) { node.error(err,msg); }
else {
msg.payload = row;
node.send(msg);
}
});
}
}
else {
node.error("msg.topic : the query is not defined as a string",msg);
node.status({fill:"red",shape:"dot",text:"msg.topic error"});
}
}
if (node.sqlquery == "batch") {
if (typeof msg.topic === 'string') {
if (msg.topic.length > 0) {
node.mydbConfig.db.exec(msg.topic, function(err) {
if (err) { node.error(err,msg);}
else {
msg.payload = [];
node.send(msg);
}
});
}
}
else {
node.error("msg.topic : the query is not defined as string", msg);
node.status({fill:"red", shape:"dot",text:"msg.topic error"});
}
}
if (node.sqlquery == "fixed"){
if (typeof node.sql === 'string') {
if (node.sql.length > 0) {
node.mydbConfig.db.all(node.sql, bind, function(err, row) {
if (err) { node.error(err,msg); }
else {
msg.payload = row;
node.send(msg);
}
});
}
}
else{
if (node.sql === null || node.sql == "") {
node.error("SQL statement config not set up",msg);
node.status({fill:"red",shape:"dot",text:"SQL config not set up"});
}
}
}
if (node.sqlquery == "prepared"){
if (typeof node.sql === 'string' && typeof msg.params !== "undefined" && typeof msg.params === "object") {
if (node.sql.length > 0) {
node.mydbConfig.db.all(node.sql, msg.params, function(err, row) {
if (err) { node.error(err,msg); }
else {
msg.payload = row;
node.send(msg);
}
});
}
}
else {
if (node.sql === null || node.sql == "") {
node.error("Prepared statement config not set up",msg);
node.status({fill:"red",shape:"dot",text:"Prepared statement not set up"});
}
if (typeof msg.params == "undefined") {
node.error("msg.params not passed");
node.status({fill:"red",shape:"dot",text:"msg.params not defined"});
}
else if (typeof msg.params != "object") {
node.error("msg.params not an object");
node.status({fill:"red",shape:"dot",text:"msg.params not an object"});
}
}
}
}
node.on("input", function(msg) {
if (msg.hasOwnProperty("extension")) {
node.mydbConfig.db.loadExtension(msg.extension, function(err) {
if (err) { node.error(err,msg); }
else { doQuery(msg); }
});
}
else { doQuery(msg); }
});
}
else {
node.error("Sqlite database not configured");
}
}
RED.nodes.registerType("sqlite",SqliteNodeIn);
}