gme exp2 layer create

def CreateLayer(http, project_id, table_id, title, description, tags):
  """Create a styled polygon Layer from a Table; display a status when complete.

  Args:
    http: http, authenticated http object.
    project_id: string, id of the GME project.
    table_id: string, the id of the source table.
    title: string, the title of the layer.
    description: string, the description of the layer.
    tags: list, list,of,tags.

  Returns:
    String id of the new layer asset.
  """
  # TODO(jlivni): Update to v1 when launched.
  # The process url param causes the Layer to auto process after create.
  create_url = "https://www.googleapis.com/mapsengine/exp2/layers/?process=true"

  headers = {"Content-Type": "application/json"}

  # Create a simple polygon style
  polygon_style = {
      "type": "displayRule",
      "displayRules": [{
          "name": "mystyle",
          "zoomLevels": {
              "min": 0,
              "max": 24
          },
          "polygonStyle": {
              "fillColor": {
                  "color": "#31a354",
                  "opacity": 0.5
              },
              "border": {
                  "color": {
                      "color": "#74c476",
                      "opacity": 0.3
                  },
                  "width": 1
              }
          }
      }]
  }

  metadata = {
      "name": title,
      "description": description,
      "projectId": project_id,
      "tags": tags,
      # You need the string value of a valid shared and publiched ACL
      # Check the "Access Lists" section of the Maps Engine UI for a list.
      "draftAccessList": "Map Editors",
      "publishedAccessList": "Map Viewers",
      "datasourceType": "table",
      "datasources": [{"id": table_id}]
  }
  metadata["vectorStyle"] = polygon_style

  logging.info("metadata: %s", metadata)

  body = json.dumps(metadata)

  logging.info("Creating layer with the following metadata: %s", metadata)

  resp, content = http.request(create_url,
                               method="POST",
                               headers=headers,
                               body=body)
  RaiseBadResponse(create_url, resp, content)
  logging.debug(content)

  # We have now created a styled Layer.
  result = json.loads(content)
  layer_id = result["id"]

  # Check everything completed.
  CheckAssetStatus(http, "layers", layer_id)
  return layer_id