Erlang googleapi

---

Aim is to build server-side oriented erlang library for work with google API

Working with the lib is simple:

Start app:

application:ensure_started(googleapi).

Init credentials:

googleapi:init_credentials(_Service_account_name = ?USER_EMAIL,
    			     _Private_key = ?PEM_FILE,
	    		     _Scope="Desired Scope ").

or

googleapi:init_credentials(_JsonFilePath = ?JSON_FILE_PATH,
                           _Scope="Desired Scope ").

or

googleapi:init_credentials(service).

Email, json file and pem file are retrieved from "Credentials" screen of GCP project console

Initializing as service is intended to work inside GCE instance and will use instance permissions and scope

For example, working with BigQuery, the scope will be "https://www.googleapis.com/auth/bigquery"

Init the API client:

googleapi:build("bigquery", "v2").

Calling object methods:

googleapi_client:call("bigquery", "datasets", "list", [{<<"projectId">>, <<"project name">>}]).

Insert data to BigQuery:

Datarow = {[
            {<<"kind">>, <<"bigquery#tableDataInsertAllRequest">>},
            {<<"skipInvalidRows">>, <<"false">> },
            {<<"ignoreUnknownValues">>, <<"true">>},
            {<<"rows">>, [ ... ]} ]}
Dataset_Json = jiffy:encode(Datarow),
{Code, Headers , InsertResult} = googleapi:call("bigquery", "tabledata","insertAll",
                                                   [{<<"projectId">>, ?PROJECT_ID},
                                                    {<<"datasetId">>, ?DATASET},
                                                    {<<"tableId">>, ?TABLENAME},
                                                    {body, Dataset_Json }]).