libcamera/monitors: rebase libcamera monitor into a bunch of hooks

src/scripts/monitors/libcamera/create-node.lua

@@ -0,0 +1,37 @@
+-- WirePlumber
+--
+-- Copyright © 2023 Collabora Ltd.
+--    @author Ashok Sidipotu <ashok.sidipotu@collabora.com>
+--
+-- SPDX-License-Identifier: MIT
+
+local cutils = require ("common-utils")
+local mutils = require ("monitor-utils")
+
+log = Log.open_topic ("s-monitors-libcam")
+
+SimpleEventHook {
+  name = "monitor/libcam/create-node",
+  after = "monitor/libcam/name-node",
+  interests = {
+    EventInterest {
+      Constraint { "event.type", "=", "create-libcam-device-node" },
+    },
+  },
+  execute = function(event)
+    local properties = event:get_data ("node-properties")
+    local parent = event:get_subject ()
+    local id = event:get_data ("node-sub-id")
+
+    -- apply properties from rules defined in JSON .conf file
+    cutils.evaluateRulesApplyProperties (properties, "monitor.libcamera.rules")
+    if properties["node.disabled"] then
+      log:warning ("lib cam device node" .. properties["device.name"] .. " disabled")
+      return
+    end
+    -- create the node
+    local node = Node ("spa-node-factory", properties)
+    node:activate (Feature.Proxy.BOUND)
+    parent:store_managed_object (id, node)
+  end
+}:register ()