semantics3-node

Node.js library bindings for the Semantics3 APIs.

npm install semantics3-node
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semantics3-node

semantics3-node is a Node client for accessing the Semantics3 Products API, which provides structured information, including pricing histories, for a large number of products. See https://www.semantics3.com for more information.

Quickstart guide: https://www.semantics3.com/quickstart API documentation can be found at https://www.semantics3.com/docs/

Installation

semantics3-node can be installed through the npm:

$ npm install semantics3-node

To build and install from the latest source:

$ git clone git@github.com:Semantics3/semantics3-node.git
$ npm install semantics3-node/

Requirements

  • oauth

Getting Started

In order to use the client, you must have both an API key and an API secret. To obtain your key and secret, you need to first create an account at https://www.semantics3.com/ You can access your API access credentials from the user dashboard at https://www.semantics3.com/dashboard/applications

Setup Work

Let's lay the groundwork.

var api_key = 'SEM3xxxxxxxxxxxxxxxxxxxxxx';
var api_secret = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
var sem3 = require('semantics3-node')(api_key,api_secret);

First Query aka 'Hello World':

Let's make our first query! For this query, we are going to search for all Toshiba products that fall under the category of "Computers and Accessories", whose cat_id is 4992.

// Build the query
sem3.products.products_field( "cat_id", 4992 );
sem3.products.products_field( "brand", "Toshiba" );

// Make the query
sem3.products.get_products(
   function(err, products) {
      if (err) {
         console.log("Couldn't execute query: get_products");
         return;
      }
    // View the results of the query
    console.log( "Results of query:\n" + JSON.stringify( products ) );
   }
);

Examples

The following examples show you how to interface with some of the core functionality of the Semantics3 Products API. For more detailed examples check out the Quickstart guide: https://www.semantics3.com/quickstart

Explore the Category Tree

In this example we are going to be accessing the categories endpoint. We are going to be specifically exploring the "Computers and Accessories" category, which has a cat_id of 4992. For more details regarding our category tree and associated cat_ids check out our API docs at https://www.semantics3.com/docs

// Build the query
sem3.products.categories_field( "cat_id", 4992 );

// Make the query
sem3.categories.get_categories(
   function(err, categories) {
      if (err) {
         console.log("Couldn't execute query: get_categories");
         return;
      }
    // View the results of the query
    console.log( "Results of query:\n" + JSON.stringify( categories ) );
   }
);

Nested Search Query

You can construct complex queries by just repeatedly calling the products_field() or add() methods. Here is how we translate the following JSON query - '{"cat_id":4992,"brand":"Toshiba","weight":{"gte":1000000,"lt":1500000},"sitedetails":{"name":"newegg.com","latestoffers":{"currency":"USD","price":{"gte":100}}}}'.

This query returns all Toshiba products within a certain weight range narrowed down to just those that retailed recently on newegg.com for >= USD 100.

// Build the query
sem3.products.products_field( "cat_id", 4992 );
sem3.products.products_field( "brand", "Toshiba" );
sem3.products.products_field( "weight", "gte", 1000000 );
sem3.products.products_field( "weight", "lt", 1500000 );
sem3.products.products_field( "sitedetails", "name", "newegg.com" );
sem3.products.products_field( "sitedetails", "latestoffers", "currency", "USD" );
sem3.products.products_field( "sitedetails", "latestoffers", "price", "gte", 100 );

// Let's make a modification - say we no longer want the weight attribute
sem3.products.remove( "products", "brand", "weight" );

// Let's view the JSON query we just constructed. This is a good starting point to debug, if you are getting incorrect 
// results for your query
var constructedJson = sem3.get_query_json( "products" );
console.log( constructedJson );

// Make the query
sem3.products.get_products(
   function(err, products) {
      if (err) {
         console.log("Couldn't execute query: get_products");
         return;
      }
    // View the results of the query
    console.log( "Results of query:\n" + JSON.stringify( products ) );
   }
);

Pagination

Let's now look at doing pagination, continuing from where we stopped previously.

// Goto the next 'page'

sem3.products.iterate_products(
   function(err, products) {
      if (err) {
         console.log("Couldn't execute query: iterate_products");
         return;
      }
      console.log( "Successfully retrieved next page of products:\n", JSON.stringify( products ) );
   }
);

Explore Price Histories

We shall use the add() method, which allows you to access any of the supported endpoints by just specifiying the name of the endpoint. add( "products", param1, param2, ...) is the equivalent of products_field( param1, param2, ... ), add( "offers", param1, param2, ... ) is the equivalent of offers_field( param1, param2, ...)

For this example, we are going to look at a particular product that is sold by select merchants and whose price is >= USD 30 and seen after a specific date (specified as a UNIX timestamp).

// Build the query
sem3.products.add( "offers", "sem3_id", "4znupRCkN6w2Q4Ke4s6sUC");
sem3.products.add( "offers", "seller", ["ATRQ56T3H9TM5","LFleurs","Frys","Walmart"] );
sem3.products.add( "offers", "currency", "USD");
sem3.products.add( "offers", "price", "gte", 30);
sem3.products.add( "offers", "lastrecorded_at", "gte", 1348654600);

// Make the query
sem3.offers.get_offers(
   function(err, offers) {
      if (err) {
         console.log("Couldn't execute query: get_offers");
         return;
      }
    // View the results of the query
    console.log( "Results of query:\n" + JSON.stringify( offers ) );
   }
);

// Alternatively we could also use the run_query method
sem3.products.run_query("offers",
   function(err, offers) {
      if (err) {
         console.log("Couldn't execute query: get_offers");
         return;
      }
    // View the results of the query
    console.log( "Results of query:\n" + JSON.stringify( offers ) );
   }
);

Contributing

Use GitHub's standard fork/commit/pull-request cycle. If you have any questions, email support@semantics3.com.

Author

Copyright (c) 2013 Semantics3 Inc.

License

The "MIT" License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
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