feat: bound active regional presentation

tests/unit/test_presentation_relevance_policy.gd

@@ -0,0 +1,227 @@
+extends GutTest
+
+const WORLD_ID := &"regional_bosnia"
+const LOCATION_ID := &"location_jajce"
+const CONTEXT_ID := &"jajce_surface"
+
+
+func test_two_thousand_candidates_stay_bounded_pinned_and_order_independent() -> void:
+	var policy := PresentationRelevancePolicy.new()
+	var candidates := _large_candidate_fixture()
+	var first := policy.select_detailed_visuals(
+		_context(), _address(LOCATION_ID, Vector3.ZERO), candidates
+	)
+
+	assert_true(first["valid"])
+	assert_eq(first["candidate_count"], 2000)
+	assert_eq(first["selected_ids"].size(), PresentationRelevancePolicy.DEFAULT_DETAIL_LIMIT)
+	assert_eq(first["mandatory_count"], 6)
+	for mandatory_id in _mandatory_ids():
+		assert_has(first["selected_ids"], mandatory_id)
+		var decision := policy.get_decision(first, mandatory_id)
+		assert_true(decision["selected"])
+		assert_true(decision["mandatory"])
+		assert_true("selected_mandatory_pin" in decision["reason_trace"])
+
+	var reordered := candidates.duplicate(true)
+	for candidate: Dictionary in reordered:
+		candidate["loaded"] = not bool(candidate["loaded"])
+	reordered.reverse()
+	var second := policy.select_detailed_visuals(
+		_context(), _address(LOCATION_ID, Vector3.ZERO), reordered
+	)
+
+	assert_true(second["valid"])
+	assert_eq(second["selected_ids"], first["selected_ids"])
+	assert_eq(_selected_scores(second), _selected_scores(first))
+
+
+func test_context_and_location_scope_override_equal_coordinates_and_foreign_pins() -> void:
+	var policy := PresentationRelevancePolicy.new()
+	var candidates: Array[Dictionary] = [
+		_candidate(&"local_named", LOCATION_ID, Vector3.ZERO, 0.2),
+		_candidate(
+			&"foreign_threat",
+			&"location_travnik",
+			Vector3.ZERO,
+			1.0,
+			{"player_affecting_threat": true}
+		),
+		_candidate(
+			&"other_context_leader",
+			LOCATION_ID,
+			Vector3.ZERO,
+			1.0,
+			{"context_id": &"jajce_interior", "leader": true}
+		),
+	]
+	var result := policy.select_detailed_visuals(
+		_context(), _address(LOCATION_ID, Vector3.ZERO), candidates, 2
+	)
+
+	assert_true(result["valid"])
+	assert_eq(result["selected_ids"], [&"local_named"])
+	var foreign := policy.get_decision(result, &"foreign_threat")
+	assert_false(foreign["selected"])
+	assert_has(foreign["reason_trace"], "rejected_different_location")
+	assert_has(foreign["reason_trace"], "pin_ignored_outside_active_scope")
+	assert_has(foreign["reason_trace"], "pin_player_affecting_threat")
+	var other_context := policy.get_decision(result, &"other_context_leader")
+	assert_has(other_context["reason_trace"], "rejected_inactive_context")
+
+
+func test_score_distance_and_stable_id_form_a_total_tie_order_with_rejection_trace() -> void:
+	var policy := PresentationRelevancePolicy.new()
+	var candidates: Array[Dictionary] = [
+		_candidate(&"entity_b", LOCATION_ID, Vector3(3.0, 0.0, 0.0), 0.5),
+		_candidate(&"entity_a", LOCATION_ID, Vector3(3.0, 0.0, 0.0), 0.5),
+		_candidate(&"entity_far", LOCATION_ID, Vector3(20.0, 0.0, 0.0), 0.1),
+	]
+	var result := policy.select_detailed_visuals(
+		_context(), _address(LOCATION_ID, Vector3.ZERO), candidates, 1
+	)
+
+	assert_true(result["valid"])
+	assert_eq(result["selected_ids"], [&"entity_a"])
+	var rejected_tie := policy.get_decision(result, &"entity_b")
+	assert_false(rejected_tie["selected"])
+	assert_true(_trace_contains_prefix(rejected_tie["reason_trace"], "importance_units_"))
+	assert_true(_trace_contains_prefix(rejected_tie["reason_trace"], "distance_millimeters_"))
+	assert_true(
+		_trace_contains_prefix(rejected_tie["reason_trace"], "rejected_detail_capacity_rank_")
+	)
+
+	candidates.reverse()
+	var reordered := policy.select_detailed_visuals(
+		_context(), _address(LOCATION_ID, Vector3.ZERO), candidates, 1
+	)
+	assert_eq(reordered["selected_ids"], result["selected_ids"])
+
+
+func test_unsatisfiable_pin_overflow_fails_closed_instead_of_silently_unpinning() -> void:
+	var policy := PresentationRelevancePolicy.new()
+	var candidates: Array[Dictionary] = [
+		_candidate(&"leader_a", LOCATION_ID, Vector3.ZERO, 0.1, {"leader": true}),
+		_candidate(&"leader_b", LOCATION_ID, Vector3.ONE, 0.2, {"leader": true}),
+		_candidate(&"leader_c", LOCATION_ID, Vector3.RIGHT, 0.3, {"leader": true}),
+	]
+	var result := policy.select_detailed_visuals(
+		_context(), _address(LOCATION_ID, Vector3.ZERO), candidates, 2
+	)
+
+	assert_false(result["valid"])
+	assert_true(result["selected_ids"].is_empty())
+	assert_eq(result["mandatory_count"], 3)
+	assert_true("mandatory_pin_overflow" in String(result["errors"][0]))
+	for candidate in candidates:
+		var decision := policy.get_decision(result, candidate["stable_id"])
+		assert_has(decision["reason_trace"], "rejected_unsatisfiable_pin_overflow")
+
+
+func test_navigation_request_budget_grants_only_two_new_stable_requests_per_frame() -> void:
+	var budget := PresentationNavRequestBudget.new()
+	assert_true(budget.enqueue(&"entity_c", 5, ["relevant"]))
+	assert_true(budget.enqueue(&"entity_b", 10, ["threat"]))
+	assert_true(budget.enqueue(&"entity_a", 10, ["leader"]))
+	assert_true(budget.enqueue(&"entity_d", 1, ["nearby"]))
+	assert_false(budget.enqueue(&"entity_a", 99, ["duplicate"]))
+
+	var first_frame := budget.take_new_requests(42)
+	assert_eq(_request_ids(first_frame), [&"entity_a", &"entity_b"])
+	assert_eq(first_frame.size(), PresentationNavRequestBudget.MAX_NEW_REQUESTS_PER_FRAME)
+	assert_true(budget.take_new_requests(42).is_empty())
+	assert_eq(budget.get_in_flight_ids(), [&"entity_a", &"entity_b"])
+	assert_eq(budget.get_pending_ids(), [&"entity_c", &"entity_d"])
+
+	var next_frame := budget.take_new_requests(43)
+	assert_eq(_request_ids(next_frame), [&"entity_c", &"entity_d"])
+	assert_true(budget.complete(&"entity_a"))
+	assert_true(budget.enqueue(&"entity_a", 2, ["retargeted"]))
+	assert_eq(_request_ids(budget.take_new_requests(44)), [&"entity_a"])
+
+
+func _large_candidate_fixture() -> Array[Dictionary]:
+	var candidates: Array[Dictionary] = []
+	for index in 2000:
+		var extras := {}
+		match index:
+			1994:
+				extras["pinned"] = true
+			1995:
+				extras["player_affecting_threat"] = true
+			1996:
+				extras["situation_participant"] = true
+			1997:
+				extras["commitment_participant"] = true
+			1998:
+				extras["leader"] = true
+			1999:
+				extras["unique_owner"] = true
+		var position := Vector3(float(index % 73), 0.0, float((index * 11) % 89))
+		var importance := float((index * 37) % 1000) / 999.0
+		var candidate := _candidate(
+			StringName("named_entity_%04d" % index), LOCATION_ID, position, importance, extras
+		)
+		candidate["loaded"] = index % 3 == 0
+		candidates.append(candidate)
+	return candidates
+
+
+func _mandatory_ids() -> Array[StringName]:
+	return [
+		&"named_entity_1994",
+		&"named_entity_1995",
+		&"named_entity_1996",
+		&"named_entity_1997",
+		&"named_entity_1998",
+		&"named_entity_1999",
+	]
+
+
+func _candidate(
+	stable_id: StringName,
+	location_id: StringName,
+	position: Vector3,
+	importance: float,
+	extras: Dictionary = {}
+) -> Dictionary:
+	var descriptor := {
+		"stable_id": stable_id,
+		"context_id": CONTEXT_ID,
+		"address": _address(location_id, position),
+		"importance": importance,
+		"named": true,
+		"loaded": false,
+	}
+	for field in extras:
+		descriptor[field] = extras[field]
+	return descriptor
+
+
+func _context() -> Dictionary:
+	return {"context_id": CONTEXT_ID, "world_id": WORLD_ID, "location_id": LOCATION_ID}
+
+
+func _address(location_id: StringName, position: Vector3) -> SpatialAddress:
+	return SpatialAddress.create(WORLD_ID, location_id, position)
+
+
+func _selected_scores(result: Dictionary) -> Array[int]:
+	var scores: Array[int] = []
+	for decision: Dictionary in result["selected_details"]:
+		scores.append(int(decision["score_units"]))
+	return scores
+
+
+func _request_ids(requests: Array[Dictionary]) -> Array[StringName]:
+	var ids: Array[StringName] = []
+	for request in requests:
+		ids.append(StringName(request["stable_id"]))
+	return ids
+
+
+func _trace_contains_prefix(trace: Array, prefix: String) -> bool:
+	for reason in trace:
+		if String(reason).begins_with(prefix):
+			return true
+	return false

tests/unit/test_presentation_relevance_policy.gd.uid

@@ -0,0 +1 @@
+uid://bgonghipke3xq

world/presentation/PresentationNavRequestBudget.gd

@@ -0,0 +1,77 @@
+class_name PresentationNavRequestBudget
+extends RefCounted
+
+const MAX_NEW_REQUESTS_PER_FRAME := 2
+
+var _pending_by_id: Dictionary = {}
+var _in_flight_ids: Dictionary = {}
+var _last_drained_frame := -1
+
+
+func enqueue(stable_id: StringName, priority: int = 0, reason_trace: Array[String] = []) -> bool:
+	if stable_id.is_empty() or _pending_by_id.has(stable_id) or _in_flight_ids.has(stable_id):
+		return false
+	var normalized_trace := reason_trace.duplicate()
+	normalized_trace.sort()
+	_pending_by_id[stable_id] = {
+		"stable_id": stable_id,
+		"priority": priority,
+		"reason_trace": normalized_trace,
+	}
+	return true
+
+
+func take_new_requests(frame_index: int) -> Array[Dictionary]:
+	var result: Array[Dictionary] = []
+	if frame_index < 0 or frame_index <= _last_drained_frame:
+		return result
+	_last_drained_frame = frame_index
+	var pending: Array[Dictionary] = []
+	for request in _pending_by_id.values():
+		pending.append((request as Dictionary).duplicate(true))
+	pending.sort_custom(_request_before)
+	for index in mini(MAX_NEW_REQUESTS_PER_FRAME, pending.size()):
+		var request: Dictionary = pending[index]
+		var stable_id: StringName = request["stable_id"]
+		_pending_by_id.erase(stable_id)
+		_in_flight_ids[stable_id] = true
+		request["reason_trace"].append("granted_frame_%d" % frame_index)
+		result.append(request)
+	return result
+
+
+func complete(stable_id: StringName) -> bool:
+	return _in_flight_ids.erase(stable_id)
+
+
+func cancel(stable_id: StringName) -> bool:
+	var changed := _pending_by_id.erase(stable_id)
+	return _in_flight_ids.erase(stable_id) or changed
+
+
+func get_pending_ids() -> Array[StringName]:
+	var result: Array[StringName] = []
+	for stable_id in _pending_by_id:
+		result.append(StringName(stable_id))
+	result.sort()
+	return result
+
+
+func get_in_flight_ids() -> Array[StringName]:
+	var result: Array[StringName] = []
+	for stable_id in _in_flight_ids:
+		result.append(StringName(stable_id))
+	result.sort()
+	return result
+
+
+func clear() -> void:
+	_pending_by_id.clear()
+	_in_flight_ids.clear()
+	_last_drained_frame = -1
+
+
+func _request_before(first: Dictionary, second: Dictionary) -> bool:
+	if int(first["priority"]) != int(second["priority"]):
+		return int(first["priority"]) > int(second["priority"])
+	return String(first["stable_id"]) < String(second["stable_id"])

world/presentation/PresentationNavRequestBudget.gd.uid

@@ -0,0 +1 @@
+uid://buboke5ox8pvq

world/presentation/PresentationRelevancePolicy.gd

@@ -0,0 +1,363 @@
+class_name PresentationRelevancePolicy
+extends RefCounted
+
+const DEFAULT_DETAIL_LIMIT := 40
+const MAX_DETAIL_LIMIT := 40
+const IMPORTANCE_SCORE_SCALE := 1_000_000
+const NAMED_SCORE_BONUS := 125_000
+const MAX_DISTANCE_PENALTY := 1_000_000
+
+const PIN_FIELDS := {
+	"pinned": "pin_explicit",
+	"player_affecting_threat": "pin_player_affecting_threat",
+	"situation_participant": "pin_situation_participant",
+	"commitment_participant": "pin_commitment_participant",
+	"leader": "pin_leader",
+	"unique_owner": "pin_unique_owner",
+}
+
+const ALLOWED_DESCRIPTOR_FIELDS := {
+	"stable_id": true,
+	"context_id": true,
+	"address": true,
+	"importance": true,
+	"named": true,
+	"loaded": true,
+	"pinned": true,
+	"player_affecting_threat": true,
+	"situation_participant": true,
+	"commitment_participant": true,
+	"leader": true,
+	"unique_owner": true,
+}
+
+
+func select_detailed_visuals(
+	active_context: Dictionary,
+	player_address: SpatialAddress,
+	candidate_descriptors: Array,
+	detail_limit: int = DEFAULT_DETAIL_LIMIT
+) -> Dictionary:
+	var errors: Array[String] = []
+	var normalized_context := _normalize_context(active_context, errors)
+	_validate_player_address(player_address, normalized_context, errors)
+	if detail_limit < 1 or detail_limit > MAX_DETAIL_LIMIT:
+		errors.append("detail_limit must be between 1 and %d" % MAX_DETAIL_LIMIT)
+	if not errors.is_empty():
+		return _invalid_result(detail_limit, errors)
+
+	var ranked: Array[Dictionary] = []
+	var rejected: Array[Dictionary] = []
+	var seen_ids: Dictionary = {}
+	for candidate_index in candidate_descriptors.size():
+		var raw_candidate: Variant = candidate_descriptors[candidate_index]
+		var candidate_errors: Array[String] = []
+		var normalized := _normalize_candidate(raw_candidate, candidate_index, candidate_errors)
+		if not candidate_errors.is_empty():
+			errors.append_array(candidate_errors)
+			continue
+		var stable_id: StringName = normalized["stable_id"]
+		if seen_ids.has(stable_id):
+			errors.append("duplicate candidate stable_id '%s'" % stable_id)
+			continue
+		seen_ids[stable_id] = true
+		var scope_rejection := _scope_rejection(normalized, normalized_context)
+		if not scope_rejection.is_empty():
+			rejected.append(_rejected_scope_decision(normalized, scope_rejection))
+			continue
+		ranked.append(_rank_candidate(normalized, player_address))
+
+	if not errors.is_empty():
+		return _invalid_result(detail_limit, errors)
+
+	ranked.sort_custom(_rank_before)
+	var mandatory_count := 0
+	for entry in ranked:
+		if bool(entry["mandatory"]):
+			mandatory_count += 1
+	if mandatory_count > detail_limit:
+		return _pin_overflow_result(detail_limit, mandatory_count, ranked, rejected)
+
+	var selected_ids: Array[StringName] = []
+	var selected_details: Array[Dictionary] = []
+	for rank_index in ranked.size():
+		var entry: Dictionary = ranked[rank_index]
+		var decision := _decision_from_ranked_entry(entry)
+		if rank_index < detail_limit:
+			decision["selected"] = true
+			decision["reason_trace"].append(
+				(
+					"selected_mandatory_pin"
+					if bool(entry["mandatory"])
+					else "selected_rank_%d" % rank_index
+				)
+			)
+			selected_ids.append(entry["stable_id"])
+			selected_details.append(decision)
+		else:
+			decision["reason_trace"].append("rejected_detail_capacity_rank_%d" % rank_index)
+			rejected.append(decision)
+
+	rejected.sort_custom(_stable_id_before)
+	var decisions: Array[Dictionary] = selected_details.duplicate(true)
+	decisions.append_array(rejected)
+	decisions.sort_custom(_stable_id_before)
+	return {
+		"valid": true,
+		"detail_limit": detail_limit,
+		"candidate_count": candidate_descriptors.size(),
+		"eligible_count": ranked.size(),
+		"mandatory_count": mandatory_count,
+		"selected_ids": selected_ids,
+		"selected_details": selected_details,
+		"rejected_ids": _decision_ids(rejected),
+		"decisions": decisions,
+		"errors": [] as Array[String],
+	}
+
+
+func get_decision(result: Dictionary, stable_id: StringName) -> Dictionary:
+	for value in result.get("decisions", []):
+		var decision := value as Dictionary
+		if StringName(decision.get("stable_id", &"")) == stable_id:
+			return decision.duplicate(true)
+	return {}
+
+
+func _normalize_context(active_context: Dictionary, errors: Array[String]) -> Dictionary:
+	var result := {}
+	for field in ["context_id", "world_id", "location_id"]:
+		var value: Variant = active_context.get(field)
+		if (value is not String and value is not StringName) or String(value).is_empty():
+			errors.append("active_context.%s must be a non-empty stable ID" % field)
+			continue
+		result[field] = StringName(value)
+	return result
+
+
+func _validate_player_address(
+	player_address: SpatialAddress, active_context: Dictionary, errors: Array[String]
+) -> void:
+	if player_address == null or not player_address.is_valid():
+		errors.append("player_address must be a valid SpatialAddress")
+		return
+	if active_context.is_empty():
+		return
+	if player_address.get_world_id() != active_context.get("world_id", &""):
+		errors.append("player_address belongs to another world")
+	if player_address.get_location_id() != active_context.get("location_id", &""):
+		errors.append("player_address belongs to another location")
+
+
+func _normalize_candidate(
+	raw_candidate: Variant, candidate_index: int, errors: Array[String]
+) -> Dictionary:
+	if raw_candidate is not Dictionary:
+		errors.append("candidate %d must be a Dictionary descriptor" % candidate_index)
+		return {}
+	var descriptor: Dictionary = raw_candidate
+	for field in descriptor:
+		if not ALLOWED_DESCRIPTOR_FIELDS.has(String(field)):
+			errors.append("candidate %d has unsupported field '%s'" % [candidate_index, field])
+
+	var stable_id_value: Variant = descriptor.get("stable_id")
+	var context_id_value: Variant = descriptor.get("context_id")
+	var stable_id := _normalize_descriptor_id(stable_id_value, candidate_index, "stable_id", errors)
+	var context_id := _normalize_descriptor_id(
+		context_id_value, candidate_index, "context_id", errors
+	)
+	var address := descriptor.get("address") as SpatialAddress
+	if address == null or not address.is_valid():
+		errors.append("candidate %d address must be a valid SpatialAddress" % candidate_index)
+	elif address.get_world_id().is_empty() or address.get_location_id().is_empty():
+		errors.append("candidate %d address must name a world and location" % candidate_index)
+
+	var importance_value: Variant = descriptor.get("importance")
+	var importance := 0.0
+	if importance_value is not int and importance_value is not float:
+		errors.append("candidate %d importance must be numeric" % candidate_index)
+	else:
+		importance = float(importance_value)
+		if not is_finite(importance) or importance < 0.0 or importance > 1.0:
+			errors.append(
+				"candidate %d importance must be finite and within [0, 1]" % candidate_index
+			)
+
+	var normalized := {
+		"stable_id": stable_id,
+		"context_id": context_id,
+		"address": address.duplicate_address() if address != null else null,
+		"importance": importance,
+		"named": _normalize_bool(descriptor, "named", candidate_index, errors, false),
+		"loaded": _normalize_bool(descriptor, "loaded", candidate_index, errors, false),
+	}
+	for pin_field in PIN_FIELDS:
+		normalized[pin_field] = _normalize_bool(
+			descriptor, String(pin_field), candidate_index, errors, false
+		)
+	return normalized
+
+
+func _normalize_descriptor_id(
+	value: Variant, candidate_index: int, field: String, errors: Array[String]
+) -> StringName:
+	if (value is not String and value is not StringName) or String(value).is_empty():
+		errors.append("candidate %d %s must be a non-empty stable ID" % [candidate_index, field])
+		return &""
+	return StringName(value)
+
+
+func _normalize_bool(
+	descriptor: Dictionary,
+	field: String,
+	candidate_index: int,
+	errors: Array[String],
+	default_value: bool
+) -> bool:
+	if not descriptor.has(field):
+		return default_value
+	var value: Variant = descriptor[field]
+	if value is not bool:
+		errors.append("candidate %d %s must be bool" % [candidate_index, field])
+		return default_value
+	return bool(value)
+
+
+func _scope_rejection(candidate: Dictionary, active_context: Dictionary) -> String:
+	if candidate["context_id"] != active_context["context_id"]:
+		return "rejected_inactive_context"
+	var address: SpatialAddress = candidate["address"]
+	if address.get_world_id() != active_context["world_id"]:
+		return "rejected_different_world"
+	if address.get_location_id() != active_context["location_id"]:
+		return "rejected_different_location"
+	return ""
+
+
+func _rejected_scope_decision(candidate: Dictionary, reason: String) -> Dictionary:
+	var pin_reasons := _pin_reasons(candidate)
+	var trace: Array[String] = [reason]
+	if not pin_reasons.is_empty():
+		trace.append("pin_ignored_outside_active_scope")
+		trace.append_array(pin_reasons)
+	return {
+		"stable_id": candidate["stable_id"],
+		"selected": false,
+		"mandatory": not pin_reasons.is_empty(),
+		"score_units": 0,
+		"distance_millimeters": -1,
+		"reason_trace": trace,
+	}
+
+
+func _rank_candidate(candidate: Dictionary, player_address: SpatialAddress) -> Dictionary:
+	var address: SpatialAddress = candidate["address"]
+	var distance_millimeters := roundi(
+		player_address.get_position().distance_to(address.get_position()) * 1000.0
+	)
+	var importance_units := roundi(float(candidate["importance"]) * IMPORTANCE_SCORE_SCALE)
+	var named_bonus := NAMED_SCORE_BONUS if bool(candidate["named"]) else 0
+	var distance_penalty := mini(distance_millimeters, MAX_DISTANCE_PENALTY)
+	var pin_reasons := _pin_reasons(candidate)
+	var trace: Array[String] = [
+		"eligible_active_context",
+		"importance_units_%d" % importance_units,
+		"distance_millimeters_%d" % distance_millimeters,
+	]
+	if bool(candidate["named"]):
+		trace.append("named_entity_bonus_%d" % NAMED_SCORE_BONUS)
+	if bool(candidate["loaded"]):
+		trace.append("load_state_ignored")
+	trace.append_array(pin_reasons)
+	return {
+		"stable_id": candidate["stable_id"],
+		"mandatory": not pin_reasons.is_empty(),
+		"score_units": importance_units + named_bonus - distance_penalty,
+		"distance_millimeters": distance_millimeters,
+		"reason_trace": trace,
+	}
+
+
+func _pin_reasons(candidate: Dictionary) -> Array[String]:
+	var result: Array[String] = []
+	for field in PIN_FIELDS:
+		if bool(candidate.get(field, false)):
+			result.append(String(PIN_FIELDS[field]))
+	return result
+
+
+func _decision_from_ranked_entry(entry: Dictionary) -> Dictionary:
+	return {
+		"stable_id": entry["stable_id"],
+		"selected": false,
+		"mandatory": entry["mandatory"],
+		"score_units": entry["score_units"],
+		"distance_millimeters": entry["distance_millimeters"],
+		"reason_trace": (entry["reason_trace"] as Array).duplicate(),
+	}
+
+
+func _pin_overflow_result(
+	detail_limit: int, mandatory_count: int, ranked: Array[Dictionary], rejected: Array[Dictionary]
+) -> Dictionary:
+	var decisions: Array[Dictionary] = rejected.duplicate(true)
+	for entry in ranked:
+		var decision := _decision_from_ranked_entry(entry)
+		decision["reason_trace"].append("rejected_unsatisfiable_pin_overflow")
+		decisions.append(decision)
+	decisions.sort_custom(_stable_id_before)
+	return {
+		"valid": false,
+		"detail_limit": detail_limit,
+		"candidate_count": ranked.size() + rejected.size(),
+		"eligible_count": ranked.size(),
+		"mandatory_count": mandatory_count,
+		"selected_ids": [] as Array[StringName],
+		"selected_details": [] as Array[Dictionary],
+		"rejected_ids": _decision_ids(decisions),
+		"decisions": decisions,
+		"errors":
+		[
+			(
+				"mandatory_pin_overflow: %d mandatory candidates exceed detail limit %d"
+				% [mandatory_count, detail_limit]
+			)
+		],
+	}
+
+
+func _invalid_result(detail_limit: int, errors: Array[String]) -> Dictionary:
+	errors.sort()
+	return {
+		"valid": false,
+		"detail_limit": detail_limit,
+		"candidate_count": 0,
+		"eligible_count": 0,
+		"mandatory_count": 0,
+		"selected_ids": [] as Array[StringName],
+		"selected_details": [] as Array[Dictionary],
+		"rejected_ids": [] as Array[StringName],
+		"decisions": [] as Array[Dictionary],
+		"errors": errors.duplicate(),
+	}
+
+
+func _decision_ids(decisions: Array[Dictionary]) -> Array[StringName]:
+	var result: Array[StringName] = []
+	for decision in decisions:
+		result.append(StringName(decision["stable_id"]))
+	return result
+
+
+func _rank_before(first: Dictionary, second: Dictionary) -> bool:
+	if bool(first["mandatory"]) != bool(second["mandatory"]):
+		return bool(first["mandatory"])
+	if int(first["score_units"]) != int(second["score_units"]):
+		return int(first["score_units"]) > int(second["score_units"])
+	if int(first["distance_millimeters"]) != int(second["distance_millimeters"]):
+		return int(first["distance_millimeters"]) < int(second["distance_millimeters"])
+	return String(first["stable_id"]) < String(second["stable_id"])
+
+
+func _stable_id_before(first: Dictionary, second: Dictionary) -> bool:
+	return String(first["stable_id"]) < String(second["stable_id"])

world/presentation/PresentationRelevancePolicy.gd.uid

@@ -0,0 +1 @@
+uid://dtxbsn1ykdj0d