##About This library is a javascript library that allows you to access the Google+ API from client side (Websites) as well as server side (NodeJS), it is built to be very lightweight and to keep itself in-sync with most of google's changes

##Prerequisites In order for you to use the client library you must first have an API key in order to access the protected resources, follow these instructions in order to get started

Create your Application at the Google Console
Enable Google+ by clicking the API Access in the menu
Once enable you will have a dhashboard for your application, this is where you will find your Simple API Access API Key
Download a copy of the GooglePlusAPI.js file and add it to your webserver

if your using client side, you need to load the library by adding the following require block to your head and setting it to the correct path

<script type="text/javascript" src="/path/to/googleplusapi.compressed.js"></script>

if your using server side, you need to requriet he library like so.

var GooglePlusAPI = require('/path/to/googleplusapi.js')

once this has been loaded you can then proceed to using the api.

##Creating an API object After you have laoded the library you have to instantiate an object, you can accomplish that like so:

<script type="text/javascript">
    var GoogleAPI = new GooglePlusAPI('<Your-API-Key-Here>');
</script>

Or server side you can just instantiate the api

var GoogleAPI = new GooglePlusAPI('<Your-API-Key-Here>');

once this is established you can then use the GoogleAPI variable to access any ofthe following methods:

getPerson(id, options, callback)
listByActivity(activityId, collection, options, callback)
listActivities(id, options, callback)
getActivity(id, options, callback)
listComments(id, options, callback)
getComment(id, options, callback)
searchPeople(query, options, callback)

you will notice a few things about these methods, the first thing is that there is always an options and a callback at the end of each function, the options is a literal-object, the options parameter are option params for the request, see there documentation for keys and values.

if you do not wish to pass in any option params (options), then you simple fill it's space with an empty object {}, this param should always exists when calling a method

##The Callback The callback's are always the same, there are 2 arguments passed into the callback when fired, the first is the error object, and second is the result object, if the request was successfull, the error object will be null, and the result object will be filled.

The error object and the result objects are relavent to the request your making, so if your calling getPerson, the result object will be a Person Resource

##Getting the data

In order to use the api, you must first instantiate the object into a variable, see above, and then you can call the API like so:

GooglePlusAPI.getPerson('110106586947414476573', {}, function(error, response){

});

####Note: The User ID number should always be treated as a string, and never and interger, this is due to how large the number is and have javascript modifies those large numbers.

within the callback we should always check for the error object, to assure that we have made a successfull request, this can be done like so:

GooglePlusAPI.getPerson('110106586947414476573', {}, function(error, result){
    if(error)
    {
        console.log('Error ' + error.code + ': ' + error.message);
        return; //!Important
    }
    
    //Here we have the result object, which is of kind person
});

##Methods and Callbacks

getPerson(id, options, callback)
id: UserID
listByActivity(activityId, collection, options, callback)
id: ActivityID
collection: [plusones | reshares]
listActivities(id, options, callback)
id: UserID
getActivity(id, options, callback)
id: ActivityID
listComments(id, options, callback)
id: ActivityID
getComment(id, options, callback)
id: CommentID
searchPeople(query, options, callback)
query: Search Query

###The Request Method

The request method should not be used that often, but this allows you to make direct requests without using the methods the method runs under the same pricipals as the others apart from teh first param is a path variable, this path variable is defined after the /v1/ of the API base URL, so of I wanted to request the following URL

https://www.googleapis.com/plus/v1/people/110106586947414476573

i would call the following:

GooglePlusAPI.request('people/110106586947414476573', {}, function(error, result){
});

###using the option params argument

When using the optional params in the method calls, you do not have to any form of encoding as this is done for you, so if i wanted to search for people named Robert Pitt as well as set the maxResults to 5, I can call the following:

GooglePlusAPI.searchPeople('Robert Pitt', {maxResults: 5}, function(error, result){
    if(error)
    {
        console.log('Error ' + error.code + ': ' + error.message);
        return; //!Important
    }
    
    //result.items.length should be limited to 5
});

#Contact

If you have any questions then feel free to contact me on my Google Plus Page (Robert Pitt)

websocketdev/Google-Plus-javascript-API

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