semantics3-node

Node.js library bindings for the Semantics3 APIs.

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/

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/
  • oauth

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

Let's lay the groundwork.

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

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(errproducts) {
      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 ) );
   }
);

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

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(errcategories) {
      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 ) );
   }
);

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(errproducts) {
      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 ) );
   }
);

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

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

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(erroffers) {
      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(erroffers) {
      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 ) );
   }
);

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

Copyright (c) 2013 Semantics3 Inc.

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