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|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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-- WirePlumber
--
-- Copyright © 2022 Collabora Ltd.
--
-- SPDX-License-Identifier: MIT
--
-- Check if the target node is defined explicitly.
-- This definition can be done in two ways.
-- 1. "node.target"/"target.object" in the node properties
-- 2. "target.node"/"target.object" in the default metadata
lutils = require ("linking-utils")
cutils = require ("common-utils")
log = Log.open_topic ("s-linking")
SimpleEventHook {
name = "linking/find-defined-target",
before = "linking/prepare-link",
interests = {
EventInterest {
Constraint { "event.type", "=", "select-target" },
},
},
execute = function (event)
local source, om, si, si_props, si_flags, target =
lutils:unwrap_select_target_event (event)
-- bypass the hook if the target is already picked up
if target then
return
end
log:info (si, string.format ("handling item %d: %s (%s)", si.id,
tostring (si_props ["node.name"]), tostring (si_props ["node.id"])))
local metadata = Settings.get_boolean ("linking.allow-moving-streams") and
cutils.get_default_metadata_object ()
local dont_fallback = cutils.parseBool (si_props ["node.dont-fallback"])
local dont_move = cutils.parseBool (si_props ["node.dont-move"])
local target_key
local target_value = nil
local node_defined = false
local target_picked = nil
if si_props ["target.object"] ~= nil then
target_value = si_props ["target.object"]
target_key = "object.serial"
node_defined = true
elseif si_props ["node.target"] ~= nil then
target_value = si_props ["node.target"]
target_key = "node.id"
node_defined = true
end
if metadata and not dont_move then
local id = metadata:find (si_props ["node.id"], "target.object")
if id ~= nil then
target_value = id
target_key = "object.serial"
node_defined = false
else
id = metadata:find (si_props ["node.id"], "target.node")
if id ~= nil then
target_value = id
target_key = "node.id"
node_defined = false
end
end
end
if target_value == "-1" then
target_picked = false
target = nil
elseif target_value and tonumber (target_value) then
target = om:lookup {
type = "SiLinkable",
Constraint { target_key, "=", target_value },
}
if target and lutils.canLink (si_props, target) then
target_picked = true
end
elseif target_value then
for lnkbl in om:iterate { type = "SiLinkable" } do
local target_props = lnkbl.properties
if (target_props ["node.name"] == target_value or
target_props ["object.path"] == target_value) and
target_props ["item.node.direction"] == cutils.getTargetDirection (si_props) and
lutils.canLink (si_props, lnkbl) then
target_picked = true
target = lnkbl
break
end
end
end
local can_passthrough, passthrough_compatible
if target then
passthrough_compatible, can_passthrough =
lutils.checkPassthroughCompatibility (si, target)
if not passthrough_compatible then
target = nil
end
end
si_flags.has_defined_target = false
if target_picked and target then
log:info (si,
string.format ("... defined target picked: %s (%s), can_passthrough:%s",
tostring (target.properties ["node.name"]),
tostring (target.properties ["node.id"]),
tostring (can_passthrough)))
si_flags.has_node_defined_target = node_defined
si_flags.can_passthrough = can_passthrough
si_flags.has_defined_target = true
event:set_data ("target", target)
elseif target_value and dont_fallback then
-- send error to client and destroy node if linger is not set
local linger = cutils.parseBool (si_props ["node.linger"])
if not linger then
local node = si:get_associated_proxy ("node")
lutils.sendClientError (event, node, -2, "defined target not found")
node:request_destroy ()
log:info(si, "... destroyed node as defined target was not found")
else
log:info(si, "... waiting for defined target as dont-fallback is set")
end
event:stop_processing ()
end
end
}:register ()