Add GH components

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+* Add Grasshopper components for publishing and subscribing to topics, for creating messages and connecting to MQTT transports.
+
 ### Changed
 
 ### Removed

src/compas_eve/ghpython/components/Ce_Message/code.py

@@ -0,0 +1,64 @@
+"""
+Create a message.
+
+COMPAS EVE v0.5.0
+"""
+
+import System
+
+import Rhino.Geometry as rg
+import rhinoscriptsyntax as rs
+
+from compas.geometry import Brep
+from compas_eve import Message
+from compas_rhino import conversions
+
+component = ghenv.Component  # noqa: F821
+
+local_values = locals()
+data = dict()
+
+for input_param in component.Params.Input:
+    name = input_param.NickName
+    value = local_values[name]
+    if isinstance(value, System.Guid):
+        try:
+            value = rs.coercegeometry(value)
+        except:  # noqa: E722
+            pass
+    if isinstance(value, rg.Point3d):
+        value = conversions.point_to_compas(value)
+    elif isinstance(value, rg.Box):
+        value = conversions.box_to_compas(value)
+    elif isinstance(value, rg.Vector3d):
+        value = conversions.vector_to_compas(value)
+    elif isinstance(value, rg.Arc):
+        value = conversions.arc_to_compas(value)
+    elif isinstance(value, rg.Circle):
+        value = conversions.circle_to_compas(value)
+    elif isinstance(value, rg.Curve):
+        value = conversions.curve_to_compas(value)
+    elif isinstance(value, rg.Cone):
+        value = conversions.cone_to_compas(value)
+    elif isinstance(value, rg.Cylinder):
+        value = conversions.cylinder_to_compas(value)
+    elif isinstance(value, rg.Line):
+        value = conversions.line_to_compas(value)
+    elif isinstance(value, rg.Mesh):
+        value = conversions.mesh_to_compas(value)
+    elif isinstance(value, rg.Plane):
+        value = conversions.plane_to_compas_frame(value)
+    elif isinstance(value, rg.Sphere):
+        value = conversions.sphere_to_compas(value)
+    elif isinstance(value, rg.PolylineCurve):
+        value = conversions.polygon_to_compas(value)
+    elif isinstance(value, rg.Polyline):
+        value = conversions.polyline_to_compas(value)
+    elif isinstance(value, rg.Surface):
+        value = conversions.surface_to_compas(value)
+    elif isinstance(value, rg.Brep):
+        value = Brep.from_native(value)
+
+    data[name] = value
+
+message = Message(**data)

src/compas_eve/ghpython/components/Ce_Message/metadata.json

@@ -0,0 +1,25 @@
+{
+    "name": "Create message",
+    "nickname": "Message",
+    "category": "COMPAS EVE",
+    "subcategory": "Events",
+    "description": "Create a new message.",
+    "exposure": 2,
+
+    "ghpython": {
+        "isAdvancedMode": false,
+        "iconDisplay": 2,
+        "inputParameters": [
+            {
+                "name": "x",
+                "description": "Example input field. Add or remove fields as needed."
+            }
+        ],
+        "outputParameters": [
+            {
+                "name": "message",
+                "description": "The newly created message."
+            }
+        ]
+    }
+}

src/compas_eve/ghpython/components/Ce_MqttTransport/code.py

@@ -0,0 +1,40 @@
+"""
+Connect or disconnect to an MQTT broker.
+
+COMPAS EVE v0.5.0
+"""
+
+from threading import Event
+
+from compas_ghpython import create_id
+from ghpythonlib.componentbase import executingcomponent as component
+from scriptcontext import sticky as st
+
+from compas_eve.mqtt import MqttTransport
+
+
+class MqttTransportConnect(component):
+    def RunScript(self, host, port, connect):
+        mqtt_transport = None
+
+        host = host or "127.0.0.1"
+        port = port or 1883
+
+        key = create_id(self, "mqtt_transport")
+        mqtt_transport = st.get(key, None)
+
+        if mqtt_transport:
+            st[key].close()
+
+        if connect:
+            event = Event()
+            transport = MqttTransport(host, port)
+            transport.on_ready(event.set)
+            if not event.wait(5):
+                raise Exception("Failed to connect to MQTT broker.")
+
+            st[key] = transport
+
+        mqtt_transport = st.get(key, None)
+        is_connected = mqtt_transport._is_connected if mqtt_transport else False
+        return (mqtt_transport, is_connected)

src/compas_eve/ghpython/components/Ce_MqttTransport/metadata.json

@@ -0,0 +1,40 @@
+{
+    "name": "MQTT Transport",
+    "nickname": "MQTT",
+    "category": "COMPAS EVE",
+    "subcategory": "Events",
+    "description": "Connect or disconnect to an MQTT broker.",
+    "exposure": 2,
+
+    "ghpython": {
+        "isAdvancedMode": true,
+        "iconDisplay": 2,
+        "inputParameters": [
+            {
+                "name": "host",
+                "description": "The host address of the MQTT broker. Defaults to 127.0.0.1.",
+                "typeHintID": "str"
+            },
+            {
+                "name": "port",
+                "description": "The port of MQTT broker. Defaults to 1883.",
+                "typeHintID": "int"
+            },
+            {
+                "name": "connect",
+                "description": "If True, connects to MQTT broker. If False, disconnects from MQTT. Defaults to False.",
+                "typeHintID": "bool"
+            }
+        ],
+        "outputParameters": [
+            {
+                "name": "mqtt_transport",
+                "description": "The MQTT transport instance."
+            },
+            {
+                "name": "is_connected",
+                "description": "True if connection established."
+            }
+        ]
+    }
+}

src/compas_eve/ghpython/components/Ce_Publish/code.py

@@ -0,0 +1,43 @@
+"""
+Publish messages to a topic.
+
+COMPAS EVE v0.5.0
+"""
+
+import time
+
+from ghpythonlib.componentbase import executingcomponent as component
+from scriptcontext import sticky as st
+
+from compas_eve import Topic
+from compas_eve import Publisher
+from compas_ghpython import create_id
+
+
+class PublishComponent(component):
+    def RunScript(self, transport, topic_name, message, on):
+        if not topic_name:
+            raise ValueError("Please specify the name of the topic")
+
+        if on is None:
+            on = True
+
+        key = create_id(self, "publisher_{}".format(id(transport)))
+        key_count = create_id(self, "publisher_count_{}".format(id(transport)))
+        publisher = st.get(key, None)
+
+        if not publisher:
+            topic = Topic(topic_name)
+            publisher = Publisher(topic, transport=transport)
+            publisher.advertise()
+            time.sleep(0.2)
+
+            st[key] = publisher
+            st[key_count] = 0
+
+        if on and message:
+            st[key_count] += 1
+            publisher.publish(message)
+            self.Message = "Published {} messages".format(st[key_count])
+
+        return st[key_count]

src/compas_eve/ghpython/components/Ce_Publish/metadata.json

@@ -0,0 +1,40 @@
+{
+    "name": "Publish to topic",
+    "nickname": "Publish",
+    "category": "COMPAS EVE",
+    "subcategory": "Events",
+    "description": "Publish messages to a topic.",
+    "exposure": 4,
+
+    "ghpython": {
+        "isAdvancedMode": true,
+        "iconDisplay": 2,
+        "inputParameters": [
+            {
+                "name": "transport",
+                "description": "An instance of transport. If no transport is specified, it will use in-memory transport."
+            },
+            {
+                "name": "topic_name",
+                "description": "The name of the topic to publish to to, e.g. `/compas_eve/hello_world/`.",
+                "typeHintID": "str"
+            },
+            {
+                "name": "message",
+                "description": "The message to publish. It can be an instance of `Message` or a dictionary"
+            },
+            {
+                "name": "on",
+                "description": "Turn ON or OFF the publisher. Defaults to True.",
+                "typeHintID": "bool"
+            }
+
+        ],
+        "outputParameters": [
+            {
+                "name": "count",
+                "description": "The count of published messages on the selected topic."
+            }
+        ]
+    }
+}

src/compas_eve/ghpython/components/Ce_Subscribe/code.py

@@ -0,0 +1,64 @@
+"""
+Subscribe to a topic to receive messages.
+
+COMPAS EVE v0.5.0
+"""
+
+from ghpythonlib.componentbase import executingcomponent as component
+
+from compas_eve import Topic
+from compas_eve import Subscriber
+from compas_eve.ghpython import BackgroundWorker
+
+
+class SubscribeComponent(component):
+    def RunScript(self, transport, topic_name, start, on):
+        if not topic_name:
+            raise ValueError("Please specify the name of the topic")
+
+        if on is None:
+            on = True
+
+        if not on:
+            BackgroundWorker.stop_instance_by_component(ghenv)  # noqa: F821
+            return None
+
+        args = (
+            transport,
+            topic_name,
+        )
+
+        self.worker = BackgroundWorker.instance_by_component(
+            ghenv,  # noqa: F821
+            self.start_subscriber,
+            dispose_function=self.stop_subscriber,
+            force_new=start,
+            auto_set_done=False,
+            args=args,
+        )
+
+        if not self.worker.is_working() and not self.worker.is_done() and start:
+            self.worker.start_work()
+
+        if hasattr(self.worker, "result"):
+            return self.worker.result
+        else:
+            return None
+
+    def start_subscriber(self, worker, transport, topic_name):
+        worker.count = 0
+
+        def received_message(message):
+            worker.count += 1
+            worker.display_message("Received {} messages".format(worker.count))
+            worker.update_result(message, 10)
+
+        topic = Topic(topic_name)
+        worker.subscriber = Subscriber(topic, callback=received_message, transport=transport)
+        worker.subscriber.subscribe()
+        worker.display_message("Subscribed")
+
+    def stop_subscriber(self, worker):
+        if hasattr(worker, "subscriber"):
+            worker.subscriber.unsubscribe()
+        worker.display_message("Stopped")

src/compas_eve/ghpython/components/Ce_Subscribe/metadata.json

@@ -0,0 +1,41 @@
+{
+    "name": "Subscribe to topic",
+    "nickname": "Subscribe",
+    "category": "COMPAS EVE",
+    "subcategory": "Events",
+    "description": "Subscribe to a topic to receive messages.",
+    "exposure": 4,
+
+    "ghpython": {
+        "isAdvancedMode": true,
+        "iconDisplay": 2,
+        "inputParameters": [
+            {
+                "name": "transport",
+                "description": "An instance of transport. If no transport is specified, it will use in-memory transport."
+            },
+            {
+                "name": "topic_name",
+                "description": "The name of the topic to subscribe to, e.g. `/compas_eve/hello_world/`.",
+                "typeHintID": "str"
+            },
+            {
+                "name": "start",
+                "description": "Starts/Restarts the subscriber.",
+                "typeHintID": "bool"
+            },
+            {
+                "name": "on",
+                "description": "Turn ON or OFF the subscriber. Defaults to True.",
+                "typeHintID": "bool"
+            }
+
+        ],
+        "outputParameters": [
+            {
+                "name": "message",
+                "description": "The last message received on the selected topic."
+            }
+        ]
+    }
+}