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https://github.com/farcasclaudiu/node-red-contrib-couchdb.git
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kolban
93 lines
3.0 KiB
JavaScript
93 lines
3.0 KiB
JavaScript
/**
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* Copyright 2015 Neil Kolban.
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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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/**
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* Implement a CoachDB accessor within a Node-RED environment.
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* The configuration parameters for the node are:
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* * serverUrl - The URL to reach the CouchDB server ... eg. http://localhost:5984
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* * database - The name of the database
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* * retrievalType - How we should retrieve a document
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* * byId
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* * byView
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* * designDoc - The name of the design document
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* * viewName - The name of a view
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* This module makes extensive use of the project called "dscape/nano"
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* found on Github at:
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*
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* https://github.com/dscape/nano
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*
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*
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*/
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module.exports = function(RED) {
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/**
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* The CouchDBNode provides the implementation for retrieving data from the CouchDB
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* database.
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*/
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function CouchDBNode(config) {
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var thisNode = this;
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var nano = require("nano")(config.serverUrl);
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var db = nano.use(config.database);
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this.on("input", function(msg) {
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// Process the request here
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if (config.retrievalType == "byId") {
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db.get(msg.payload, function(err, body) {
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if (!err) {
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msg.payload = body;
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thisNode.send(msg);
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}
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}); // End of db.get
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} // End of byId
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else if (config.retrievalType == "byView") {
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db.view(config.designDoc, config.viewName, {
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key: msg.payload,
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include_docs: true
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}, function(err, body) {
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if (!err) {
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msg.payload = body.rows;
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thisNode.send(msg);
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}
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}); // End of db.view
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} // End of byView
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}); // End of on "input"
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RED.nodes.createNode(thisNode, config);
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} // End of CouchDBNode definition
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/**
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* Insert data into the database
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* * serverUrl - The URL to reach the CouchDB server ... eg. http://localhost:5984
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* * database - The name of the database
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*/
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function CouchDBInsertNode(config) {
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var thisNode = this;
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var nano = require("nano")(config.serverUrl);
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var db = nano.use(config.database);
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this.on("input", function(msg) {
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// Process the insertion request here
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db.insert(msg.payload, function(err, body) {
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// Nothing to do on the callback
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if (err) {
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thisNode.warn("[" + config.type + ":" + config.name + "]: Error: " + JSON.stringify(err));
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}
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}); // End of db.insert
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}); // End of on "input"
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} // End of CouchDBInsertNode
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RED.nodes.registerType("couchdb", CouchDBNode);
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RED.nodes.registerType("couchdbinsert", CouchDBInsertNode);
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} // End of module.exports
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// End of file
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