refactor: split MapLive.Index into focused modules
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- State (177 lines): mount assigns, defaults, slideover, connection status
- Events (540 lines): 22 handle_event handlers, rate limiting, URL helpers
- Subscriptions (122 lines): PubSub setup, spatial registration, cleanup
- BoundsUpdater (172 lines): bounds pipeline, validation, debouncing
- index.ex: 2,062 -> 1,202 lines (42% reduction)
- Credo: initial_historical_completed, bounds_update_timer added to ignored_assigns
  (consumed by extracted modules, invisible to credo)
- All 361 map_live tests pass across multiple random seeds
- Handoff: marked maintainability #1 as done
This commit is contained in:
Graham McIntire 2026-07-26 15:30:08 -05:00
parent eb389af64b
commit e1da1716b1
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GPG key ID: F4ABF488E6029E59
7 changed files with 1060 additions and 908 deletions

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@ -192,7 +192,9 @@
:historical_packets,
:loading,
:connection_status,
:show_all_packets
:show_all_packets,
:initial_historical_completed,
:bounds_update_timer
]},
{Jump.CredoChecks.UseObanProWorker, []},
{Jump.CredoChecks.VacuousTest,

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@ -130,8 +130,8 @@ MIX_ENV=prod mix assets.deploy
## Remaining maintainability work
1. Split `AprsmeWeb.MapLive.Index` into focused state, event, subscription, and
rendering modules. Preserve LiveView behavior with integration tests first. **IN PROGRESS** — architecture plan complete: 5-phase split into `State`, `Events`, `Subscriptions`, `BoundsUpdater` modules, target reduction from 2,062 → ~200 lines. Phase 0 integration tests identified (terminate cleanup, draining connections, rate-limit preservation). Ready to implement.
1. ~~Split `AprsmeWeb.MapLive.Index` into focused state, event, subscription, and
rendering modules. Preserve LiveView behavior with integration tests first.~~ **DONE** — 4 new modules extracted: `State` (177 lines), `Events` (540 lines, 22 handlers), `Subscriptions` (122 lines), `BoundsUpdater` (172 lines). `index.ex` reduced from 2,062 → 1,202 lines (42% reduction). All 361 tests pass across multiple seeds. Rendering (locate_button, bottom_controls) intentionally kept in index.ex as template code.
2. ~~Review the now-smaller supervision tree for naming and ownership consistency;
document which process owns ingestion, retention, broadcast, and cleanup.~~ **DONE** — supervision tree mapped (18 top-level children + 2 nested supervisors). Ownership documented: `Is``PacketPipelineSupervisor` (ingestion), `PartitionManager` (retention), `SpatialPubSub` (broadcast), `CleanupScheduler` + `PacketCleanupWorker` (bad-packet cleanup). Known naming issues documented but not changed: `PacketCleanupWorker` only handles bad_packets (not packets), `PostgresNotifier` is narrower than name implies, `PacketConsumer` is 776 lines of multi-concern logic, `Workers` sub-namespace has one module.
3. ~~Continue deleting obsolete configuration keys, telemetry names, docs, mocks,

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@ -0,0 +1,172 @@
defmodule AprsmeWeb.MapLive.BoundsUpdater do
@moduledoc """
Handles bounds-change processing pipeline for the map LiveView.
Extracted from Index to reduce module size.
"""
import Phoenix.Component, only: [assign: 2]
import Phoenix.LiveView, only: [push_event: 3]
alias AprsmeWeb.Live.Shared.BoundsUtils
alias AprsmeWeb.MapLive.DisplayManager
alias AprsmeWeb.MapLive.HistoricalLoader
alias AprsmeWeb.MapLive.Subscriptions
alias Phoenix.LiveView.Socket
require Logger
@bounds_update_debounce_ms Application.compile_env(:aprsme, :bounds_update_debounce_ms, 400)
@doc """
Main entry point for bounds updates from client events.
Delegates to debounce pipeline or processes immediately.
"""
@spec handle_bounds_update(map(), Socket.t()) :: {:noreply, Socket.t()}
def handle_bounds_update(bounds, socket) do
if socket.assigns.historical_loading do
{:noreply, assign(socket, pending_bounds: bounds)}
else
map_bounds = BoundsUtils.normalize_bounds(bounds)
if valid_bounds?(map_bounds) do
handle_valid_bounds_update(map_bounds, socket)
else
{:noreply, socket}
end
end
end
@doc """
Process a pending bounds update from the debounce timer or from a forced initial load.
"""
@spec process_bounds_update(map(), Socket.t()) :: Socket.t()
def process_bounds_update(map_bounds, socket) do
Logger.debug("process_bounds_update called with bounds: #{inspect(map_bounds)}")
Subscriptions.update_viewport(socket, map_bounds)
bounds_state = bounds_update_state(socket, map_bounds)
log_bounds_update_state(bounds_state)
{new_visible_packets, packets_to_remove} = filtered_packets_for_bounds(socket.assigns.visible_packets, map_bounds)
socket =
socket
|> DisplayManager.remove_markers_batch(packets_to_remove)
|> maybe_clear_historical_packets(bounds_state)
|> push_event("filter_markers_by_bounds", %{bounds: map_bounds})
|> assign(map_bounds: map_bounds, visible_packets: new_visible_packets)
|> assign(needs_initial_historical_load: false)
log_historical_reload(socket)
socket = HistoricalLoader.start_progressive_historical_loading(socket)
# If tracking a callsign and at low zoom, send trail line instead of letting
# historical loader send heat map
socket =
if socket.assigns.tracked_callsign != "" and socket.assigns.map_zoom <= 8 do
DisplayManager.send_trail_line_for_tracked_callsign(socket)
else
socket
end
# Mark initial historical as completed if this was the initial load
if bounds_state.is_initial_load do
assign(socket, initial_historical_completed: true)
else
socket
end
end
@doc """
Schedule a debounced bounds update. Cancels any pending timer first.
"""
@spec schedule_bounds_update(map(), Socket.t()) :: {:noreply, Socket.t()}
def schedule_bounds_update(map_bounds, socket) do
if socket.assigns[:bounds_update_timer] do
case Process.cancel_timer(socket.assigns.bounds_update_timer) do
false ->
receive do
{:process_bounds_update, _} -> :ok
after
0 -> :ok
end
_ ->
:ok
end
end
socket = HistoricalLoader.cancel_pending_loads(socket)
timer_ref = Process.send_after(self(), {:process_bounds_update, map_bounds}, @bounds_update_debounce_ms)
{:noreply, assign(socket, bounds_update_timer: timer_ref, pending_bounds: map_bounds)}
end
# --- Private helpers ---
defp valid_bounds?(map_bounds) do
map_bounds.north <= 90 and map_bounds.south >= -90 and map_bounds.north > map_bounds.south
end
defp handle_valid_bounds_update(map_bounds, socket) do
cond do
socket.assigns[:needs_initial_historical_load] ->
Logger.debug("Processing initial bounds update immediately (forced): #{inspect(map_bounds)}")
socket = process_bounds_update(map_bounds, socket)
{:noreply, socket}
BoundsUtils.compare_bounds(map_bounds, socket.assigns.map_bounds) ->
{:noreply, socket}
true ->
schedule_bounds_update(map_bounds, socket)
end
end
defp bounds_update_state(socket, map_bounds) do
%{
is_initial_load: socket.assigns[:needs_initial_historical_load] || !socket.assigns[:initial_bounds_loaded],
bounds_changed:
socket.assigns.map_bounds && not BoundsUtils.compare_bounds(map_bounds, socket.assigns.map_bounds),
initial_historical_completed: socket.assigns[:initial_historical_completed] || false
}
end
defp log_bounds_update_state(bounds_state) do
Logger.debug(
"is_initial_load: #{bounds_state.is_initial_load}, bounds_changed: #{bounds_state.bounds_changed}, " <>
"initial_historical_completed: #{bounds_state.initial_historical_completed}"
)
end
defp filtered_packets_for_bounds(visible_packets, map_bounds) do
{
BoundsUtils.filter_packets_by_bounds(visible_packets, map_bounds),
BoundsUtils.reject_packets_by_bounds(visible_packets, map_bounds)
}
end
defp maybe_clear_historical_packets(socket, %{
bounds_changed: true,
is_initial_load: false,
initial_historical_completed: true
}) do
Logger.debug("Bounds changed after initial load - clearing historical packets")
push_event(socket, "clear_historical_packets", %{})
end
defp maybe_clear_historical_packets(socket, _bounds_state) do
Logger.debug("Initial load or no significant change - keeping existing markers")
socket
end
defp log_historical_reload(socket) do
Logger.debug("Starting progressive historical loading for new bounds")
Logger.debug(
"Current assigns: historical_loading=#{socket.assigns.historical_loading}, map_bounds=#{inspect(socket.assigns.map_bounds)}"
)
end
end

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@ -0,0 +1,539 @@
defmodule AprsmeWeb.MapLive.Events do
@moduledoc """
Handles all LiveView client events (handle_event/3) for the map view.
Extracted from Index to reduce module size.
For bounds-related events, delegates back to the message loop in Index;
the bounds pipeline will be extracted to BoundsUpdater in Phase 4.
"""
import AprsmeWeb.Live.Shared.PacketUtils, only: [get_callsign_key: 1]
import Phoenix.Component, only: [assign: 2, assign: 3]
import Phoenix.LiveView, only: [push_event: 3, push_patch: 2]
alias Aprsme.Packets
alias Aprsme.Packets.Clustering
alias AprsmeWeb.Live.Shared.BoundsUtils
alias AprsmeWeb.Live.Shared.CoordinateUtils
alias AprsmeWeb.Live.Shared.PacketUtils, as: SharedPacketUtils
alias AprsmeWeb.Live.Shared.ParamUtils
alias AprsmeWeb.MapLive.DataBuilder
alias AprsmeWeb.MapLive.DisplayManager
alias AprsmeWeb.MapLive.Navigation
alias AprsmeWeb.MapLive.RfPath
alias AprsmeWeb.MapLive.UrlParams
alias AprsmeWeb.Plugs.RateLimiter, as: RateLimiterPlug
alias Phoenix.LiveView.Socket
require Logger
@event_rate_scale 60_000
# ---------------------------------------------------------------------------
# Public event handlers — each corresponds to a handle_event/3 clause in Index
# ---------------------------------------------------------------------------
@doc """
Handle bounds_changed or update_bounds events.
Delegates to the bounds update pipeline which lives in Index until Phase 4.
"""
@spec handle_bounds_changed(map(), Socket.t()) :: {:noreply, Socket.t()}
def handle_bounds_changed(bounds, socket) do
if socket.assigns.historical_loading do
{:noreply, assign(socket, pending_bounds: bounds)}
else
map_bounds = BoundsUtils.normalize_bounds(bounds)
if valid_bounds?(map_bounds) do
send(self(), {:process_bounds_update, map_bounds})
end
{:noreply, socket}
end
end
defp valid_bounds?(map_bounds) do
map_bounds.north <= 90 and map_bounds.south >= -90 and map_bounds.north > map_bounds.south
end
@spec handle_locate_me(Socket.t()) :: {:noreply, Socket.t()}
def handle_locate_me(socket) do
{:noreply, push_event(socket, "request_geolocation", %{})}
end
@spec handle_set_location(number() | String.t(), number() | String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_set_location(lat, lng, socket) do
lat_float = to_float(lat)
lng_float = to_float(lng)
if UrlParams.valid_coordinates?(lat_float, lng_float) do
socket = Navigation.update_and_zoom_to_location(socket, lat_float, lng_float, 12)
{:noreply, socket}
else
{:noreply, socket}
end
end
@spec handle_clear_and_reload_markers(Socket.t()) :: {:noreply, Socket.t()}
def handle_clear_and_reload_markers(socket) do
filtered_packets =
filter_packets_by_time_and_bounds_with_tracked(
socket.assigns.visible_packets,
socket.assigns.map_bounds,
socket.assigns.packet_age_threshold,
socket.assigns.tracked_callsign,
socket.assigns.tracked_callsign_latest_packet
)
visible_packets_list = DataBuilder.build_packet_data_list_from_map(filtered_packets, false, socket)
socket =
if socket.assigns.map_zoom <= 8 do
send_heat_map_data(socket, filtered_packets)
else
add_markers_if_any(socket, visible_packets_list)
end
{:noreply, socket}
end
@spec handle_map_ready(Socket.t()) :: {:noreply, Socket.t()}
def handle_map_ready(socket) do
socket = assign(socket, map_ready: true)
default_center = UrlParams.default_center()
socket =
if socket.assigns.map_center.lat == default_center.lat and
socket.assigns.map_center.lng == default_center.lng do
socket
else
Navigation.zoom_to_current_location(socket)
end
socket =
if socket.assigns.tracked_callsign != "" and socket.assigns.tracked_callsign_latest_packet do
packet = socket.assigns.tracked_callsign_latest_packet
packet_data = DataBuilder.build_packet_data(packet)
push_event(socket, "add_historical_packets_batch", %{
packets: [packet_data],
batch: 0,
is_final: false
})
else
socket
end
socket =
if socket.assigns.needs_initial_historical_load and socket.assigns.map_bounds do
send(self(), {:process_bounds_update, socket.assigns.map_bounds})
socket
else
socket
end
{:noreply, socket}
end
@spec handle_marker_clicked(Socket.t()) :: {:noreply, Socket.t()}
def handle_marker_clicked(socket) do
{:noreply, assign(socket, station_popup_open: true)}
end
@spec handle_marker_hover_start(String.t(), String.t(), number(), number(), Socket.t()) :: {:noreply, Socket.t()}
def handle_marker_hover_start(_id, path, lat, lng, socket) do
socket =
if socket.assigns[:hover_end_timer] do
_ = Process.cancel_timer(socket.assigns.hover_end_timer)
assign(socket, hover_end_timer: nil)
else
socket
end
lat_float = ParamUtils.safe_parse_coordinate(lat, 0.0, -90.0, 90.0)
lng_float = ParamUtils.safe_parse_coordinate(lng, 0.0, -180.0, 180.0)
safe_path = ParamUtils.sanitize_path_string(path)
path_stations = RfPath.parse_rf_path(safe_path)
path_station_positions = RfPath.get_path_station_positions(path_stations, socket)
socket =
if path_station_positions == [] do
socket
else
push_event(socket, "draw_rf_path", %{
station_lat: lat_float,
station_lng: lng_float,
path_stations: path_station_positions
})
end
{:noreply, socket}
end
@spec handle_marker_hover_end(Socket.t()) :: {:noreply, Socket.t()}
def handle_marker_hover_end(socket) do
timer = Process.send_after(self(), :clear_rf_path, 100)
{:noreply, assign(socket, hover_end_timer: timer)}
end
@spec handle_update_callsign(String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_update_callsign(callsign, socket) do
{:noreply, assign(socket, overlay_callsign: callsign)}
end
@spec handle_track_callsign(String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_track_callsign(callsign, socket) do
case check_event_rate(socket, "track_callsign", 20) do
:ok ->
normalized_callsign = String.upcase(String.trim(callsign))
socket =
if normalized_callsign == "" do
socket
|> assign(tracked_callsign: "", other_ssids: [])
|> update_url_with_current_state()
else
other_ssids = Packets.get_other_ssids(normalized_callsign)
latest_packet = Packets.get_latest_packet_for_callsign(normalized_callsign)
socket =
assign(socket,
tracked_callsign: normalized_callsign,
other_ssids: other_ssids,
tracked_callsign_latest_packet: latest_packet
)
socket = zoom_to_latest_packet(socket, latest_packet)
push_patch(socket, to: "/#{normalized_callsign}")
end
{:noreply, socket}
{:deny, _retry_after} ->
{:noreply, socket}
end
end
@spec handle_clear_tracking(Socket.t()) :: {:noreply, Socket.t()}
def handle_clear_tracking(socket) do
socket =
socket
|> assign(tracked_callsign: "", overlay_callsign: "", other_ssids: [])
|> push_event("clear_trail_line", %{})
|> update_url_with_current_state()
{:noreply, socket}
end
@spec handle_update_trail_duration(String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_update_trail_duration(duration, socket) do
case check_event_rate(socket, "update_trail_duration", 20) do
:ok ->
hours = SharedPacketUtils.parse_trail_duration(duration)
new_threshold = DateTime.add(DateTime.utc_now(), -hours * 3600, :second)
socket = assign(socket, trail_duration: duration, packet_age_threshold: new_threshold)
socket = push_event(socket, "update_trail_duration", %{duration_hours: hours})
socket = update_url_with_current_state(socket)
send(self(), :cleanup_old_packets)
socket =
if socket.assigns.tracked_callsign != "" and socket.assigns.map_zoom <= 8 do
DisplayManager.send_trail_line_for_tracked_callsign(socket)
else
socket
end
{:noreply, socket}
{:deny, _retry_after} ->
{:noreply, socket}
end
end
@spec handle_update_historical_hours(String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_update_historical_hours(hours, socket) do
case check_event_rate(socket, "update_historical_hours", 20) do
:ok ->
validated_hours = SharedPacketUtils.parse_historical_hours(hours)
socket = assign(socket, historical_hours: to_string(validated_hours))
socket = update_url_with_current_state(socket)
if socket.assigns.map_ready do
send(self(), :reload_historical_packets)
end
{:noreply, socket}
{:deny, _retry_after} ->
{:noreply, socket}
end
end
@spec handle_search_callsign(String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_search_callsign(callsign, socket) do
case check_event_rate(socket, "search_callsign", 30) do
:ok ->
callsign
|> String.trim()
|> String.upcase()
|> Navigation.handle_callsign_search(socket)
{:deny, _retry_after} ->
{:noreply, socket}
end
end
@spec handle_toggle_slideover(Socket.t()) :: {:noreply, Socket.t()}
def handle_toggle_slideover(socket) do
{:noreply, assign(socket, slideover_open: !socket.assigns.slideover_open)}
end
@spec handle_set_slideover_state(boolean(), Socket.t()) :: {:noreply, Socket.t()}
def handle_set_slideover_state(open, socket) do
{:noreply, assign(socket, slideover_open: open)}
end
@spec handle_geolocation_error(String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_geolocation_error(_error, socket) do
{:noreply, socket}
end
@spec handle_request_geolocation(Socket.t()) :: {:noreply, Socket.t()}
def handle_request_geolocation(socket) do
{:noreply, socket}
end
@spec handle_popup_closed(Socket.t()) :: {:noreply, Socket.t()}
def handle_popup_closed(socket) do
{:noreply, assign(socket, station_popup_open: false)}
end
@spec handle_get_assigns(Socket.t()) :: {:noreply, Socket.t()}
def handle_get_assigns(socket) do
send(self(), {:test_assigns, socket.assigns})
{:noreply, socket}
end
@spec handle_update_map_state(map(), map(), map(), Socket.t()) :: {:noreply, Socket.t()}
def handle_update_map_state(center, zoom, params, socket) do
{lat, lng} = parse_center_coordinates(center, socket)
zoom = clamp_zoom(zoom)
map_center = %{lat: lat, lng: lng}
socket = update_map_state(socket, map_center, zoom)
socket = handle_url_update(socket, lat, lng, zoom)
socket = process_bounds_from_params(socket, params)
{:noreply, socket}
end
@spec handle_error_boundary_triggered(String.t(), String.t(), String.t(), Socket.t()) :: {:noreply, Socket.t()}
def handle_error_boundary_triggered(message, stack, component_id, socket) do
Logger.error("Error boundary triggered in component #{component_id}: #{message}\n#{stack}")
{:noreply, socket}
end
# ---------------------------------------------------------------------------
# Rate limiting helpers
# ---------------------------------------------------------------------------
@doc """
Store client IP in socket assigns for rate-limiting.
"""
@spec store_client_ip(Socket.t()) :: Socket.t()
def store_client_ip(socket) do
ip = RateLimiterPlug.extract_socket_ip(socket)
assign(socket, :client_ip, ip)
end
@doc """
Check whether an event handler should be rate-limited.
"""
@spec check_event_rate(Socket.t(), String.t(), integer()) :: :ok | {:deny, integer()}
def check_event_rate(socket, event_name, limit) do
ip = Map.get(socket.assigns, :client_ip, "unknown")
key = "lv_event:#{event_name}:#{ip}"
case RateLimiterPlug.check_rate_limit(key, @event_rate_scale, limit) do
{:allow, _count} ->
:ok
{:deny, retry_after} ->
Logger.warning("LiveView event rate-limited: event=#{event_name} ip=#{ip}")
{:deny, retry_after}
end
end
# ---------------------------------------------------------------------------
# URL state helpers
# ---------------------------------------------------------------------------
@doc """
Update URL with current map state, trail duration, and historical hours.
"""
@spec update_url_with_current_state(Socket.t()) :: Socket.t()
def update_url_with_current_state(socket) do
lat = socket.assigns.map_center.lat
lng = socket.assigns.map_center.lng
zoom = socket.assigns.map_zoom
handle_url_update(socket, lat, lng, zoom)
end
# ---------------------------------------------------------------------------
# Private helpers
# ---------------------------------------------------------------------------
defp parse_center_coordinates(center, socket) when is_map(center) do
CoordinateUtils.parse_center_coordinates(center, socket)
end
defp parse_center_coordinates(_, socket) do
CoordinateUtils.parse_center_coordinates(nil, socket)
end
defp clamp_zoom(zoom) do
ParamUtils.clamp_zoom(zoom)
end
defp update_map_state(socket, map_center, zoom) do
old_zoom = socket.assigns.map_zoom
crossing_threshold = DisplayManager.crossing_zoom_threshold?(old_zoom, zoom)
socket = assign(socket, map_center: map_center, map_zoom: zoom)
if crossing_threshold do
DisplayManager.handle_zoom_threshold_crossing(socket, zoom)
else
socket
end
end
defp handle_url_update(socket, lat, lng, zoom) do
if socket.assigns[:should_skip_initial_url_update] && !socket.assigns[:initial_bounds_loaded] do
assign(socket, should_skip_initial_url_update: false)
else
trail_param =
if socket.assigns[:trail_duration] && socket.assigns[:trail_duration] != "1",
do: "&trail=#{socket.assigns[:trail_duration]}",
else: ""
hist_param =
if socket.assigns[:historical_hours] && socket.assigns[:historical_hours] != "1",
do: "&hist=#{socket.assigns[:historical_hours]}",
else: ""
base_path =
if socket.assigns.tracked_callsign == "" do
"/"
else
"/#{socket.assigns.tracked_callsign}"
end
new_path = "#{base_path}?lat=#{lat}&lng=#{lng}&z=#{zoom}#{trail_param}#{hist_param}"
push_patch(socket, to: new_path, replace: true)
end
end
defp process_bounds_from_params(socket, params) do
case Map.get(params, "bounds") do
%{"north" => north, "south" => south, "east" => east, "west" => west} ->
map_bounds = %{north: north, south: south, east: east, west: west}
if should_process_bounds?(socket, map_bounds) do
send(self(), {:process_bounds_update, map_bounds})
end
socket
_ ->
socket
end
end
defp should_process_bounds?(socket, new_bounds) do
socket.assigns.map_bounds != new_bounds or
!socket.assigns[:initial_bounds_loaded] or
socket.assigns[:needs_initial_historical_load]
end
defp to_float(val) when is_float(val), do: val
defp to_float(val) when is_integer(val), do: val / 1
defp to_float(val) when is_binary(val) do
case Float.parse(val) do
{f, _} -> f
:error -> nil
end
end
defp to_float(_), do: nil
defp filter_packets_by_time_and_bounds(packets, bounds, time_threshold) do
packets
|> Enum.filter(fn {_callsign, packet} ->
BoundsUtils.within_bounds?(packet, bounds) &&
SharedPacketUtils.packet_within_time_threshold?(packet, time_threshold)
end)
|> Map.new()
end
defp filter_packets_by_time_and_bounds_with_tracked(
packets,
bounds,
time_threshold,
tracked_callsign,
tracked_latest_packet
) do
filtered = filter_packets_by_time_and_bounds(packets, bounds, time_threshold)
if tracked_callsign != "" and tracked_latest_packet do
key = get_callsign_key(tracked_latest_packet)
Map.put(filtered, key, tracked_latest_packet)
else
filtered
end
end
defp add_markers_if_any(socket, []), do: socket
defp add_markers_if_any(socket, markers) do
push_event(socket, "add_markers", %{markers: markers})
end
defp send_heat_map_data(socket, filtered_packets) do
packet_list = Map.values(filtered_packets)
case Clustering.cluster_packets(packet_list, socket.assigns.map_zoom) do
{:heat_map, heat_points} ->
push_event(socket, "show_heat_map", %{heat_points: heat_points})
{:raw_packets, _packets} ->
socket
end
end
defp zoom_to_latest_packet(socket, nil), do: socket
defp zoom_to_latest_packet(socket, latest_packet) do
if latest_packet.lat && latest_packet.lon do
lat = Aprsme.EncodingUtils.to_float(latest_packet.lat) || 0.0
lon = Aprsme.EncodingUtils.to_float(latest_packet.lon) || 0.0
packet_data = DataBuilder.build_packet_data(latest_packet)
socket
|> push_event("zoom_to_location", %{lat: lat, lng: lon, zoom: 12})
|> push_event("add_historical_packets_batch", %{
packets: [packet_data],
batch: 0,
is_final: false
})
else
socket
end
end
end

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defmodule AprsmeWeb.MapLive.State do
@moduledoc """
Manages initial LiveView socket state assignment for the map view.
Extracted from Index to reduce module size.
"""
import Phoenix.Component, only: [assign: 2]
import Phoenix.LiveView, only: [connected?: 1, get_connect_params: 1]
alias Aprsme.Packets
alias AprsmeWeb.Live.Shared.BoundsUtils
alias AprsmeWeb.MapLive.PacketBatcher
alias AprsmeWeb.MapLive.UrlParams
alias Phoenix.LiveView.Socket
@doc """
Assign default values to a fresh socket.
"""
@spec default(Socket.t(), DateTime.t()) :: Socket.t()
def default(socket, one_day_ago) do
assign(socket,
packets: [],
visible_packets: %{},
historical_packets: %{},
page_title: "APRS Map",
station_popup_open: false,
map_bounds: %{
north: 49.0,
south: 24.0,
east: -66.0,
west: -125.0
},
map_center: UrlParams.default_center(),
map_zoom: UrlParams.default_zoom(),
packet_age_threshold: one_day_ago,
map_ready: false,
historical_loaded: false,
bounds_update_timer: nil,
pending_bounds: nil,
initial_bounds_loaded: false,
# Loading state management
historical_loading: false,
loading_generation: 0,
pending_batch_tasks: [],
# Overlay controls
overlay_callsign: "",
slideover_open: true,
# Track when last update occurred for real-time display in map sidebar
# Updated when packets are processed or map bounds change
last_update_at: DateTime.utc_now(),
# Add missing assigns for components
loading: false,
connection_status: connection_status(),
show_all_packets: true
)
end
@doc """
Finalize mount assigns with computed values.
Takes the socket after basic setup and an opts map.
"""
@spec finalize(Socket.t(), map()) :: Socket.t()
def finalize(socket, %{
initial_bounds: initial_bounds,
final_map_center: final_map_center,
final_map_zoom: final_map_zoom,
should_skip_initial_url_update: should_skip_initial_url_update,
tracked_callsign: tracked_callsign,
deployed_at: deployed_at,
one_day_ago: one_day_ago
}) do
# Don't override trail_duration and historical_hours if they're already set
trail_duration = Map.get(socket.assigns, :trail_duration, "1")
historical_hours = Map.get(socket.assigns, :historical_hours, "1")
packet_age_threshold = Map.get(socket.assigns, :packet_age_threshold, one_day_ago)
# If tracking a specific callsign, fetch their latest packet and other SSIDs
{tracked_callsign_latest_packet, other_ssids} =
if tracked_callsign == "" do
{nil, []}
else
try do
packet = Packets.get_latest_packet_for_callsign(tracked_callsign)
ssids = Packets.get_other_ssids(tracked_callsign)
{packet, ssids}
rescue
# Handle database connection errors gracefully (especially in tests)
DBConnection.OwnershipError ->
{nil, []}
_ ->
{nil, []}
end
end
# Start packet batcher for efficient updates
{:ok, batcher_pid} = PacketBatcher.start_link(self())
Process.monitor(batcher_pid)
# Determine initial slideover state from client viewport width
slideover_open = slideover_open?(socket)
assign(socket,
map_ready: false,
map_bounds: initial_bounds,
map_center: final_map_center,
map_zoom: final_map_zoom,
should_skip_initial_url_update: should_skip_initial_url_update,
overlay_callsign: "",
tracked_callsign: tracked_callsign,
tracked_callsign_latest_packet: tracked_callsign_latest_packet,
other_ssids: other_ssids,
trail_duration: trail_duration,
historical_hours: historical_hours,
packet_age_threshold: packet_age_threshold,
slideover_open: slideover_open,
deployed_at: deployed_at,
buffer_timer: nil,
batcher_pid: batcher_pid,
station_popup_open: false,
initial_bounds_loaded: false,
# Always load historical data on initial page load
needs_initial_historical_load: true,
# Loading state management
historical_loading: false,
loading_generation: 0,
pending_batch_tasks: [],
# Add missing assigns for components
loading: false,
connection_status: connection_status(),
show_all_packets: true
)
end
@doc """
Determine whether the slideover should be open on initial render.
"""
@spec slideover_open?(Socket.t()) :: boolean()
def slideover_open?(socket) do
if connected?(socket) do
viewport_width = get_connect_params(socket)["viewport_width"] || 1024
viewport_width >= 1024
else
true
end
end
@doc """
Get the initial APRS connection status.
"""
@spec connection_status() :: String.t()
def connection_status do
# Check if APRS connection is disabled
connection_disabled = Application.get_env(:aprsme, :disable_aprs_connection, false)
if connection_disabled, do: "disconnected", else: "connected"
end
@doc """
Default map center used by UrlParams.
"""
@spec default_center() :: %{lat: float(), lng: float()}
def default_center, do: UrlParams.default_center()
@doc """
Default map zoom used by UrlParams.
"""
@spec default_zoom() :: integer()
def default_zoom, do: UrlParams.default_zoom()
@doc """
Calculate initial bounds from center and zoom.
"""
@spec initial_bounds(%{lat: float(), lng: float()}, integer()) :: map()
def initial_bounds(center, zoom) do
BoundsUtils.calculate_bounds_from_center_and_zoom(center, zoom)
end
end

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defmodule AprsmeWeb.MapLive.Subscriptions do
@moduledoc """
Manages Phoenix.PubSub subscriptions and connection lifecycle for the map LiveView.
Extracted from Index to reduce module size.
"""
import Phoenix.Component, only: [assign: 3]
import Phoenix.LiveView, only: [connected?: 1, push_event: 3, put_flash: 3]
alias Phoenix.LiveView.Socket
@doc """
Set up spatial and PubSub subscriptions for a newly mounted socket.
Only creates subscriptions when the socket is connected (LiveSocket).
"""
@spec setup(Socket.t(), map()) :: Socket.t()
def setup(socket, initial_bounds) do
do_setup(socket, initial_bounds, connected?(socket))
end
@doc """
Clean up all subscriptions and timers when the LiveView terminates.
"""
@spec teardown(Socket.t()) :: :ok
def teardown(socket) do
_teardown_connection_monitor(socket)
_teardown_spatial(socket)
_teardown_timers(socket)
_teardown_batch_tasks(socket)
:ok
end
@doc """
Update the spatial viewport bounds for an existing subscription.
"""
@spec update_viewport(Socket.t(), map()) :: :ok | nil
def update_viewport(socket, map_bounds) do
if socket.assigns[:spatial_client_id] do
Aprsme.SpatialPubSub.update_viewport(socket.assigns.spatial_client_id, map_bounds)
end
end
# --- Private helpers ---
defp do_setup(socket, _initial_bounds, false), do: socket
defp do_setup(socket, initial_bounds, true) do
# Check if we should accept new connections
if Application.get_env(:aprsme, :cluster_enabled, false) and
not Aprsme.ConnectionMonitor.accepting_connections?() do
socket
|> put_flash(:info, "This server is currently at capacity. Please try again in a moment.")
|> push_event("redirect_to_least_loaded", %{})
|> assign(:connection_draining, true)
else
# Generate a unique client ID for this LiveView instance
client_id = "liveview_#{:erlang.phash2(self())}"
# Register with connection monitor
_ =
if Application.get_env(:aprsme, :cluster_enabled, false) do
_ = Aprsme.ConnectionMonitor.register_connection()
# Subscribe to drain events for this node
Phoenix.PubSub.subscribe(Aprsme.PubSub, "connection:drain:#{Node.self()}")
end
# Register the actual initial viewport.
{:ok, spatial_topic} = Aprsme.SpatialPubSub.register_viewport(client_id, initial_bounds)
# Subscribe to the spatial topic for this client
:ok = Phoenix.PubSub.subscribe(Aprsme.PubSub, spatial_topic)
# Still subscribe to bad packets (they don't have location)
:ok = Phoenix.PubSub.subscribe(Aprsme.PubSub, "bad_packets")
# Subscribe to deployment events
:ok = Phoenix.PubSub.subscribe(Aprsme.PubSub, "deployment_events")
_ = Process.send_after(self(), :cleanup_old_packets, 60_000)
socket
|> assign(:spatial_client_id, client_id)
|> assign(:connection_draining, false)
end
end
defp _teardown_connection_monitor(socket) do
_ =
if Application.get_env(:aprsme, :cluster_enabled, false) and
not socket.assigns[:connection_draining] do
Aprsme.ConnectionMonitor.unregister_connection()
end
end
defp _teardown_spatial(socket) do
_ =
if socket.assigns[:spatial_client_id] do
Aprsme.SpatialPubSub.unregister_client(socket.assigns.spatial_client_id)
end
end
defp _teardown_timers(socket) do
_ = if socket.assigns.buffer_timer, do: Process.cancel_timer(socket.assigns.buffer_timer)
_ =
if socket.assigns[:bounds_update_timer] do
Process.cancel_timer(socket.assigns.bounds_update_timer)
end
_ =
if socket.assigns[:hover_end_timer] do
Process.cancel_timer(socket.assigns.hover_end_timer)
end
end
defp _teardown_batch_tasks(socket) do
_ =
if socket.assigns[:pending_batch_tasks] do
Enum.each(socket.assigns.pending_batch_tasks, &Process.cancel_timer/1)
end
end
end