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80 lines
2.9 KiB
80 lines
2.9 KiB
5 years ago
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'use strict';
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const Aspect = require('./operation').Aspect;
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const defineAspects = require('./operation').defineAspects;
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const OperationBase = require('./operation').OperationBase;
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const decorateCommand = require('../utils').decorateCommand;
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const decorateWithReadConcern = require('../utils').decorateWithReadConcern;
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const executeCommand = require('./db_ops').executeCommand;
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const handleCallback = require('../utils').handleCallback;
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const resolveReadPreference = require('../utils').resolveReadPreference;
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const toError = require('../utils').toError;
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/**
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* Execute a geo search using a geo haystack index on a collection.
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*
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* @class
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* @property {Collection} a Collection instance.
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* @property {number} x Point to search on the x axis, ensure the indexes are ordered in the same order.
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* @property {number} y Point to search on the y axis, ensure the indexes are ordered in the same order.
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* @property {object} [options] Optional settings. See Collection.prototype.geoHaystackSearch for a list of options.
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*/
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class GeoHaystackSearchOperation extends OperationBase {
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/**
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* Construct a GeoHaystackSearch operation.
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*
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* @param {Collection} a Collection instance.
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* @param {number} x Point to search on the x axis, ensure the indexes are ordered in the same order.
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* @param {number} y Point to search on the y axis, ensure the indexes are ordered in the same order.
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* @param {object} [options] Optional settings. See Collection.prototype.geoHaystackSearch for a list of options.
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*/
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constructor(collection, x, y, options) {
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super(options);
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this.collection = collection;
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this.x = x;
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this.y = y;
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}
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/**
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* Execute the operation.
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*
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* @param {Collection~resultCallback} [callback] The command result callback
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*/
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execute(callback) {
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const coll = this.collection;
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const x = this.x;
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const y = this.y;
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let options = this.options;
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// Build command object
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let commandObject = {
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geoSearch: coll.collectionName,
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near: [x, y]
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};
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// Remove read preference from hash if it exists
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commandObject = decorateCommand(commandObject, options, ['readPreference', 'session']);
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options = Object.assign({}, options);
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// Ensure we have the right read preference inheritance
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options.readPreference = resolveReadPreference(coll, options);
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// Do we have a readConcern specified
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decorateWithReadConcern(commandObject, coll, options);
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// Execute the command
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executeCommand(coll.s.db, commandObject, options, (err, res) => {
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if (err) return handleCallback(callback, err);
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if (res.err || res.errmsg) handleCallback(callback, toError(res));
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// should we only be returning res.results here? Not sure if the user
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// should see the other return information
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handleCallback(callback, null, res);
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});
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}
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}
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defineAspects(GeoHaystackSearchOperation, Aspect.READ_OPERATION);
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module.exports = GeoHaystackSearchOperation;
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