openflexure-microscope-server/docs/source/extensions/example_extension/03_marshaling_data.py

76 lines
2.4 KiB
Python

from labthings.server.extensions import BaseExtension
from labthings.server.find import find_component
from labthings.server.view import View
from labthings.server.decorators import use_args, marshal_with
from labthings.server.schema import Schema
from labthings.server import fields
## Extension methods
# Define which properties of a Microscope object we care about,
# and what types they should be converted to
class MicroscopeIdentifySchema(Schema):
name = fields.String() # Microscopes name
id = fields.UUID() # Microscopes unique ID
status = fields.Dict() # Status dictionary
camera = fields.String() # Camera object (represented as a string)
stage = fields.String() # Stage object (represented as a string)
def rename(microscope, new_name):
"""
Rename the microscope
"""
microscope.name = new_name
microscope.save_settings()
## Extension views
class ExampleIdentifyView(View):
# Format our returned object using MicroscopeIdentifySchema
@marshal_with(MicroscopeIdentifySchema())
def get(self):
# Find our microscope component
microscope = find_component("org.openflexure.microscope")
# Return our microscope object,
# let @marshal_with handle formatting the output
return microscope
class ExampleRenameView(View):
# Format our returned object using MicroscopeIdentifySchema
@marshal_with(MicroscopeIdentifySchema())
# Expect a request parameter called "name", which is a string. Pass to argument "args".
@use_args({"name": fields.String(required=True, example="My Example Microscope")})
def post(self, args):
# Look for our "name" parameter in the request arguments
new_name = args.get("name")
# Find our microscope component
microscope = find_component("org.openflexure.microscope")
# Pass microscope and new name to our rename function
rename(microscope, new_name)
# Return our microscope object,
# let @marshal_with handle formatting the output
return microscope
## Create extension
# Create your extension object
my_extension = BaseExtension("com.myname.myextension", version="0.0.0")
# Add methods to your extension
my_extension.add_method(rename, "rename")
# Add API views to your extension
my_extension.add_view(ExampleIdentifyView, "/identify")
my_extension.add_view(ExampleRenameView, "/rename")