Reworked glance salt formulas

image_import and image_absent are added
image_download added to be used with
barbican's sign_image

Change-Id: I9d885aa9b139b440dcbc08263341bc7ff1f38f05
Related-Issue: PROD-19310
diff --git a/_modules/glancev2/image.py b/_modules/glancev2/image.py
new file mode 100644
index 0000000..b8eedbe
--- /dev/null
+++ b/_modules/glancev2/image.py
@@ -0,0 +1,102 @@
+try:
+    from urllib.parse import urlencode
+except ImportError:
+    from urllib import urlencode
+import hashlib
+
+from glancev2.common import send, get_raw_client, get_by_name_or_uuid
+
+RESOURCE_LIST_KEY = 'images'
+
+
+@send('get')
+def image_list(**kwargs):
+    url = '/v2/images?{}'.format(urlencode(kwargs))
+    return url, {}
+
+
+@send('post')
+def image_create(**kwargs):
+    url = '/v2/images'
+    return url, {'json': kwargs}
+
+
+@get_by_name_or_uuid(image_list, RESOURCE_LIST_KEY)
+@send('get')
+def image_get_details(image_id, **kwargs):
+    url = '/v2/images/{}'.format(image_id)
+    return url, {}
+
+
+@get_by_name_or_uuid(image_list, RESOURCE_LIST_KEY)
+@send('patch')
+def image_update(image_id, properties, **kwargs):
+    url = '/v2/images/{}'.format(image_id)
+    headers = {
+        'Content-Type': 'application/openstack-images-v2.1-json-patch',
+    }
+    return url, {'json': properties, 'headers': headers}
+
+
+@get_by_name_or_uuid(image_list, RESOURCE_LIST_KEY)
+@send('delete')
+def image_delete(image_id, **kwargs):
+    url = '/v2/images/{}'.format(image_id)
+    return url, {}
+
+
+@get_by_name_or_uuid(image_list, RESOURCE_LIST_KEY)
+@send('post')
+def image_deactivate(image_id, **kwargs):
+    url = '/v2/images/{}/actions/deactivate'.format(image_id)
+    return url, {}
+
+
+@get_by_name_or_uuid(image_list, RESOURCE_LIST_KEY)
+@send('post')
+def image_reactivate(image_id, **kwargs):
+    url = '/v2/images/{}/actions/reactivate'.format(image_id)
+    return url, {}
+
+
+class StreamingDownloader(object):
+
+    def __init__(self, adapter, image_id, chunksize):
+        self.hasher = hashlib.new('md5')
+        self.chunksize = chunksize
+
+        resp = adapter.get('/v2/images/{}/file'.format(image_id),
+                           stream=True)
+        if resp.status_code != 200:
+            raise Exception('Invalid response code: %s' % resp.status_code)
+
+        self._request = resp
+
+    def __iter__(self):
+        for chunk in self._request.iter_content(chunk_size=self.chunksize):
+            self.hasher.update(chunk)
+            yield chunk
+
+    def validate(self):
+        return self.hasher.hexdigest() == self._request.headers['Content-Md5']
+
+
+@get_by_name_or_uuid(image_list, RESOURCE_LIST_KEY)
+def image_data_download(image_id, file_name, **kwargs):
+    cloud_name = kwargs.pop('cloud_name')
+    adapter = get_raw_client(cloud_name)
+    downloader = StreamingDownloader(adapter, image_id, 1024 * 1024)
+    with open(file_name, 'wb') as f:
+        for chunk in downloader:
+            f.write(chunk)
+    return downloader.validate()
+
+
+@get_by_name_or_uuid(image_list, RESOURCE_LIST_KEY)
+@send('put')
+def image_data_upload(image_id, file_name, **kwargs):
+    url = '/v2/images/{}/file'.format(image_id)
+    headers = {'Content-Type': 'application/octet-stream '}
+    with open(file_name, 'rb') as f:
+        data = f.readlines()
+    return url, {'json': data, 'headers': headers}