Miso Project - Dataset: CouchDB Importer

couchdb-importer.js

// Underscore utility
var _ = require("underscore");
// Miso library
var Miso = require("miso.dataset");
// Nano library
var nano = require("nano");

/*
 * The Couchdb importer is responsible for fetching data from a CouchDB
 * database.
 *
 * Parameters:
 *   options
 *     auth - Authentication to the database server
 *     host - Address to the database server
 *     db - Name of the database
 *     query - Query to make to the database
 */
Miso.Importers.Couchdb = function(options) {
  _.defaults(this, options, {
    auth: "",
    host: "",
    db: "",
    query: ""
  });

  // Generate the CouchDB url
  var url = [ this.auth, this.host, this.db ].join("");

  // Establish a connection
  this.connection = nano([ url, this.query && "?" + this.query ].join(""));
};

_.extend(Miso.Importers.Couchdb.prototype, {
  fetch: function(options) {
    if (_.isFunction(this.view)) {
      this.view(this.connection, function(err, data) {
        if (err) {
          return options.error(err);
        }

        return options.success(data.rows);
      });
    }
  }
});