# Zend_Service_Amazon

## Introduction

Zend_Service_Amazon is a simple API for using Amazon web services. Zend_Service_Amazon has two APIs: a more traditional one that follows Amazon's own API, and a simpler "Query API" for constructing even complex search queries easily.

Zend_Service_Amazon enables developers to retrieve information appearing throughout Amazon.com web sites directly through the Amazon Web Services API. Examples include:

- Store item information, such as images, descriptions, pricing, and more

- Customer and editorial reviews

- Similar products and accessories

- Amazon.com offers

- ListMania lists

In order to use Zend_Service_Amazon, you should already have an Amazon developer API key aswell as a secret key. To get a key and for more information, please visit the Amazon Web Services web site. As of August 15th, 2009 you can only use the Amazon Product Advertising API through Zend_Service_Amazon, when specifying the additional secret key.

Attention

Your Amazon developer API and secret keys are linked to your Amazon identity, so take appropriate measures to keep them private.

Search Amazon Using the Traditional API

In this example, we search for PHP books at Amazon and loop through the results, printing them.

    $amazon = new Zend_Service_Amazon('AMAZON_API_KEY', 'US', 'AMAZON_SECRET_KEY');
    $results = $amazon->itemSearch(array('SearchIndex' => 'Books',
                                         'Keywords' => 'php'));
    foreach ($results as $result) {
        echo $result->Title . '<br />';
    }

Search Amazon Using the Query API

Here, we also search for PHP books at Amazon, but we instead use the Query API, which resembles the Fluent Interface design pattern.

    $query = new Zend_Service_Amazon_Query('AMAZON_API_KEY',
                                           'US',
                                           'AMAZON_SECRET_KEY');
    $query->category('Books')->Keywords('PHP');
    $results = $query->search();
    foreach ($results as $result) {
        echo $result->Title . '<br />';
    }

## Country Codes

By default, Zend_Service_Amazon connects to the United States ("`US`") Amazon web service. To connect from a different country, simply specify the appropriate country code string as the second parameter to the constructor:

Choosing an Amazon Web Service Country

    // Connect to Amazon in Japan
    $amazon = new Zend_Service_Amazon('AMAZON_API_KEY', 'JP', 'AMAZON_SECRET_KEY');

Country codes

Valid country codes are: `CA`, `DE`, `FR`, `JP`, `UK`, and `US`.

## Looking up a Specific Amazon Item by ASIN

The itemLookup() method provides the ability to fetch a particular Amazon item when the ASIN is known.

Looking up a Specific Amazon Item by ASIN

    $amazon = new Zend_Service_Amazon('AMAZON_API_KEY', 'US', 'AMAZON_SECRET_KEY');
    $item = $amazon->itemLookup('B0000A432X');

The itemLookup() method also accepts an optional second parameter for handling search options. For full details, including a list of available options, please see the relevant Amazon documentation.

Image information

To retrieve images information for your search results, you must set `ResponseGroup` option to `Medium` or `Large`.

## Performing Amazon Item Searches

Searching for items based on any of various available criteria are made simple using the itemSearch() method, as in the following example:

Performing Amazon Item Searches

    $amazon = new Zend_Service_Amazon('AMAZON_API_KEY', 'US', 'AMAZON_SECRET_KEY');
    $results = $amazon->itemSearch(array('SearchIndex' => 'Books',
                                         'Keywords' => 'php'));
    foreach ($results as $result) {
        echo $result->Title . '<br />';
    }

Using the ResponseGroup Option

The `ResponseGroup` option is used to control the specific information that will be returned in the response.

    $amazon = new Zend_Service_Amazon('AMAZON_API_KEY', 'US', 'AMAZON_SECRET_KEY');
    $results = $amazon->itemSearch(array(
        'SearchIndex'   => 'Books',
        'Keywords'      => 'php',
        'ResponseGroup' => 'Small,ItemAttributes,Images,SalesRank,Reviews,' .
                           'EditorialReview,Similarities,ListmaniaLists'
        ));
    foreach ($results as $result) {
        echo $result->Title . '<br />';
    }

The itemSearch() method accepts a single array parameter for handling search options. For full details, including a list of available options, please see the relevant Amazon documentation

The Zend_Service_Amazon_Query class is an easy to use wrapper around this method.

## Using the Alternative Query API

### Introduction

Zend_Service_Amazon_Query provides an alternative API for using the Amazon Web Service. The alternative API uses the Fluent Interface pattern. That is, all calls can be made using chained method calls. (e.g., `$obj->method()->method2($arg)`)

The Zend_Service_Amazon_Query API uses overloading to easily set up an item search and then allows you to search based upon the criteria specified. Each of the options is provided as a method call, and each method's argument corresponds to the named option's value:

Search Amazon Using the Alternative Query API

In this example, the alternative query API is used as a fluent interface to specify options and their respective values:

    $query = new Zend_Service_Amazon_Query('MY_API_KEY', 'US', 'AMAZON_SECRET_KEY');
    $query->Category('Books')->Keywords('PHP');
    $results = $query->search();
    foreach ($results as $result) {
        echo $result->Title . '<br />';
    }

This sets the option `Category` to "Books" and `Keywords` to "PHP".

For more information on the available options, please refer to the relevant Amazon documentation.

## Zend_Service_Amazon Classes

The following classes are all returned by Zend_Service_Amazon::itemLookup() and Zend_Service_Amazon::itemSearch():

- Zend_Service_Amazon_Item

- Zend_Service_Amazon_Image

- Zend_Service_Amazon_ResultSet

- Zend_Service_Amazon_OfferSet

- Zend_Service_Amazon_Offer

- Zend_Service_Amazon_SimilarProduct

- Zend_Service_Amazon_Accessories

- Zend_Service_Amazon_CustomerReview

- Zend_Service_Amazon_EditorialReview

- Zend_Service_Amazon_ListMania

### Zend_Service_Amazon_Item

Zend_Service_Amazon_Item is the class type used to represent an Amazon item returned by the web service. It encompasses all of the items attributes, including title, description, reviews, etc.

#### Zend_Service_Amazon_Item::asXML()

string asXML

Return the original XML for the item

#### Properties

Zend_Service_Amazon_Item has a number of properties directly related to their standard Amazon API counterparts.

Zend_Service_Amazon_Item Properties

Name | Type | Description
--- | --- | ---
ASIN | string | Amazon Item ID
DetailPageURL | string | URL to the Items Details Page
SalesRank | int | Sales Rank for the Item
SmallImage | Zend_Service_Amazon_Image | Small Image of the Item
MediumImage | Zend_Service_Amazon_Image | Medium Image of the Item
LargeImage | Zend_Service_Amazon_Image | Large Image of the Item
Subjects | array | Item Subjects
Offers | `Zend_Service_Amazon_OfferSet` | Offer Summary and Offers for the Item
CustomerReviews | array | Customer reviews represented as an array of `Zend_Service_Amazon_CustomerReview` objects
EditorialReviews | array | Editorial reviews represented as an array of `Zend_Service_Amazon_EditorialReview` objects
SimilarProducts | array | Similar Products represented as an array of `Zend_Service_Amazon_SimilarProduct` objects
Accessories | array | Accessories for the item represented as an array of `Zend_Service_Amazon_Accessories` objects
Tracks | array | An array of track numbers and names for Music CDs and `DVD`s
ListmaniaLists | array | Item related Listmania Lists as an array of `Zend_Service_Amazon_ListmainList` objects
PromotionalTag | string | Item Promotional Tag

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### Zend_Service_Amazon_Image

Zend_Service_Amazon_Image represents a remote Image for a product.

#### Properties

Zend_Service_Amazon_Image Properties

Name | Type | Description
--- | --- | ---
Url | Zend_Uri | Remote URL for the Image
Height | int | The Height of the image in pixels
Width | int | The Width of the image in pixels

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### Zend_Service_Amazon_ResultSet

Zend_Service_Amazon_ResultSet objects are returned by Zend_Service_Amazon::itemSearch() and allow you to easily handle the multiple results returned.

SeekableIterator

Implements the `SeekableIterator` for easy iteration (e.g. using `foreach`), as well as direct access to a specific result using seek().

#### Zend_Service_Amazon_ResultSet::totalResults()

int totalResults

Returns the total number of results returned by the search

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### Zend_Service_Amazon_OfferSet

Each result returned by Zend_Service_Amazon::itemSearch() and Zend_Service_Amazon::itemLookup() contains a Zend_Service_Amazon_OfferSet object through which pricing information for the item can be retrieved.

#### Properties

Zend_Service_Amazon_OfferSet Properties

Name | Type | Description
--- | --- | ---
LowestNewPrice | int | Lowest Price for the item in "New" condition
LowestNewPriceCurrency | string | The currency for the `LowestNewPrice`
LowestOldPrice | int | Lowest Price for the item in "Used" condition
LowestOldPriceCurrency | string | The currency for the `LowestOldPrice`
TotalNew | int | Total number of "new" condition available for the item
TotalUsed | int | Total number of "used" condition available for the item
TotalCollectible | int | Total number of "collectible" condition available for the item
TotalRefurbished | int | Total number of "refurbished" condition available for the item
Offers | array | An array of Zend_Service_Amazon_Offer objects.

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### Zend_Service_Amazon_Offer

Each offer for an item is returned as an Zend_Service_Amazon_Offer object.

#### Zend_Service_Amazon_Offer Properties

Properties

Name | Type | Description
--- | --- | ---
MerchantId | string | Merchants Amazon ID
MerchantName | string | Merchants Amazon Name. Requires setting the `ResponseGroup` option to `OfferFull` to retrieve.
GlancePage | string | URL for a page with a summary of the Merchant
Condition | string | Condition of the item
OfferListingId | string | ID of the Offer Listing
Price | int | Price for the item
CurrencyCode | string | Currency Code for the price of the item
Availability | string | Availability of the item
IsEligibleForSuperSaverShipping | boolean | Whether the item is eligible for Super Saver Shipping or not

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### Zend_Service_Amazon_SimilarProduct

When searching for items, Amazon also returns a list of similar products that the searcher may find to their liking. Each of these is returned as a Zend_Service_Amazon_SimilarProduct object.

Each object contains the information to allow you to make sub-sequent requests to get the full information on the item.

#### Properties

Zend_Service_Amazon_SimilarProduct Properties

Name | Type | Description
--- | --- | ---
ASIN | string | Products Amazon Unique ID (ASIN)
Title | string | Products Title

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### Zend_Service_Amazon_Accessories

Accessories for the returned item are represented as Zend_Service_Amazon_Accessories objects

#### Properties

Zend_Service_Amazon_Accessories Properties

Name | Type | Description
--- | --- | ---
ASIN | string | Products Amazon Unique ID (ASIN)
Title | string | Products Title

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### Zend_Service_Amazon_CustomerReview

Each Customer Review is returned as a Zend_Service_Amazon_CustomerReview object.

#### Properties

Zend_Service_Amazon_CustomerReview Properties

Name | Type | Description
--- | --- | ---
Rating | string | Item Rating
HelpfulVotes | string | Votes on how helpful the review is
CustomerId | string | Customer ID
TotalVotes | string | Total Votes
Date | string | Date of the Review
Summary | string | Review Summary
Content | string | Review Content

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### Zend_Service_Amazon_EditorialReview

Each items Editorial Reviews are returned as a Zend_Service_Amazon_EditorialReview object

#### Properties

Zend_Service_Amazon_EditorialReview Properties

Name | Type | Description
--- | --- | ---
Source | string | Source of the Editorial Review
Content | string | Review Content

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### Zend_Service_Amazon_Listmania

Each results List Mania List items are returned as Zend_Service_Amazon_Listmania objects.

#### Properties

Zend_Service_Amazon_Listmania Properties

Name | Type | Description
--- | --- | ---
ListId | string | List ID
ListName | string | List Name

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