fmc-rest-client 0.2

## FMC REST CLIENT
Easy to use REST Client for Firepower Management Center REST API

### Features
* Create object for FMC REST resources and perform CRUD operations
* Maintains REST connection with FMC
* Listing for a particular resource type supports fetching all results in single go
* Easy to add support for new resources or url endpoints

### Enhancements in future
* Support for bulk operations, leveraging FMC REST API where available or support in client
* Iterator for list operation
* Get by name

## How to use

### Using REST Client
Create FMCRestClient instance
```
fmc = FMCRestClient(fmc_server_url, username, password)
# create a resource instance
host1 = Host('host1', '1.1.1.1')
# create in FMC
host1 = fmc.create(host1)
# get all Host objects
hosts = fmc.list(Host())
for host in hosts:
print(host.name)
print(host.json())
# update value for host1
host1.value = '2.2.2.2'
fmc.update(host1)
# get host1 from FMC
host1 = fmc.load(host1)
print(host1.json())
# delete host1 from FMC
fmc.remove(host1)
```
### Adding a new FMC resource class
To add a new class representing FMC REST API resource, follow the below guideline
* Class name should be singular name of the FMC REST resource or url endpoint.
* The class should extend the appropriate base classes defined in 'fmc_rest_client.core.base_resources' module.
* The member variables name should match the attribute names in json
* Complex structure or nested attributes in json can be models as dictionary or another object of a class extending BaseContainedResource class.

#### Examples <br>
##### Resource having list attribute
For Network Group object we have following json -
```
{
"id": "005056A9-0AC2-0ed3-0000-025769807771",
"name": "nog1",
"type": "NetworkGroup"
"objects": {
"type": "Range",
"id": "005056A9-0AC2-0ed3-0000-025769808881",
"name": "range1",
}
],
"literals": [
{
"type": "Network",
"value": "1.2.3.0/24"
}
]
}

```
A simple resource class for this can be like below -
```
class NetworkGroup(ObjectResource):
def __init__(self, name=None, objects=None, literals=None):
super().__init__(name)
self.objects = objects
self.literals = literals
```
Or a complex resource class can look like following -
```
class NetworkGroup(ObjectResource):
def __init__(self, name=None, objects=None, literals=None):
super().__init__(name)
if objects == None:
objects = []
super().__setattr__('objects',objects)
if literals == None:
literals = []
super().__setattr__('literals', literals)

def __setattr__(self, name, value):
if name in ['objects', 'literals']:
raise Exception("You cannot set value for attribute {}. Its a list, operate on that, "
"e.g net_grp_obj.{}.append(host1)".format(name, name))
else:
super().__setattr__(name, value)
```
##### Resource with complex structure
Refer AccessPolicy and AccessRule class examples in fmc_rest_client.resources module.
AccessPolicy uses a AccessPolicyDefaultAction for a nested structure for defaultAction field, while AccessRule
uses a dict for field sourceNetworks.