Graham McIntire
d5781f2581
This commit addresses two major areas: 1. Crash Prevention & Error Handling: - Added error handling to all database queries to prevent crashes - Implemented circuit breaker pattern for APRS-IS connection - Added timeouts to all Redis operations (5 second timeout) - Fixed unsafe pattern matches that could cause MatchError crashes - Added try/rescue blocks around background tasks - Improved socket operation error handling with proper cleanup - Enhanced packet cleanup worker with comprehensive error handling 2. RF Path Station Markers: - Fixed issue where digipeater/iGate icons weren't shown when searching for callsigns - Now loads and displays position markers for all stations in the RF path - Extracts RF path stations from tracked callsign packets - Fetches latest position for each digipeater/iGate - Properly displays complete RF path visualization with station positions Technical details: - Added Process.alive? checks before sending messages - Fixed resource cleanup in terminate functions - Added proper error handling to File.read operations - Implemented safe wrapper for ShutdownHandler health checks - All changes ensure the app continues running even when errors occur 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
852 lines
26 KiB
Elixir
852 lines
26 KiB
Elixir
defmodule Aprsme.Packets do
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@moduledoc """
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The Packets context.
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"""
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@behaviour Aprsme.PacketsBehaviour
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import Ecto.Query, warn: false
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alias Aprs.Types.MicE
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alias Aprsme.BadPacket
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alias Aprsme.Packet
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alias Aprsme.Packets.QueryBuilder
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alias Aprsme.Repo
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alias AprsmeWeb.TimeUtils
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require Logger
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@doc """
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Stores a packet in the database.
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## Parameters
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* `packet_data` - Map containing packet data to be stored
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"""
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@spec store_packet(map()) :: {:ok, struct()} | {:error, :validation_error | :storage_exception}
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def store_packet(packet_data) do
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require Logger
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try do
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# First sanitize the input data
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sanitized_packet_data = Aprsme.EncodingUtils.sanitize_packet(packet_data)
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packet_attrs =
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sanitized_packet_data
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|> Packet.extract_additional_data(
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sanitized_packet_data[:raw_packet] || sanitized_packet_data["raw_packet"] || ""
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)
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|> normalize_packet_attrs()
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|> set_received_at()
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|> patch_lat_lon_from_data_extended()
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|> then(fn attrs ->
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{lat, lon} = extract_position(attrs)
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set_lat_lon(attrs, lat, lon)
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end)
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|> normalize_ssid()
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|> then(fn attrs ->
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device_identifier = Aprsme.DeviceParser.extract_device_identifier(packet_data)
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canonical_identifier = get_canonical_device_identifier(device_identifier)
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Map.put(attrs, :device_identifier, canonical_identifier)
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end)
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# require Logger
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# Logger.debug("Sanitized packet_attrs before insert: #{inspect(packet_attrs)}")
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# Set device_identifier to parsed value, fallback to destination if nil
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parsed_device_id = Aprsme.DeviceParser.extract_device_identifier(packet_data)
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device_id = parsed_device_id || Map.get(packet_attrs, :destination)
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packet_attrs = Map.put(packet_attrs, :device_identifier, device_id)
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# Logger.debug("Inserting packet with device_identifier=#{inspect(device_id)}, destination=#{inspect(Map.get(packet_attrs, :destination))}")
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insert_packet(packet_attrs, packet_data)
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rescue
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error ->
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Logger.error("Exception in store_packet for #{inspect(packet_data[:sender])}: #{inspect(error)}")
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store_bad_packet(packet_data, error)
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{:error, :storage_exception}
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end
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end
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defp normalize_packet_attrs(packet_data) do
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case_result =
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case packet_data do
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%Packet{} = packet ->
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packet
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|> Map.from_struct()
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|> Map.delete(:__meta__)
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%{} ->
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packet_data
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end
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case_result
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|> Aprsme.EncodingUtils.sanitize_packet()
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|> normalize_data_type()
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end
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defp normalize_data_type(attrs) do
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Aprsme.EncodingUtils.normalize_data_type(attrs)
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end
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defp set_received_at(attrs) do
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current_time = DateTime.truncate(DateTime.utc_now(), :microsecond)
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Map.put(attrs, :received_at, current_time)
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end
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defp patch_lat_lon_from_data_extended(attrs) do
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case attrs[:data_extended] do
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%{} = ext ->
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ext_map = if Map.has_key?(ext, :__struct__), do: Map.from_struct(ext), else: ext
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lat = extract_lat_from_ext_map(ext_map)
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lon = extract_lon_from_ext_map(ext_map)
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latd = to_decimal(lat)
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lond = to_decimal(lon)
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if not is_nil(latd) and not is_nil(lond) do
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attrs
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|> Map.put(:lat, latd)
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|> Map.put(:lon, lond)
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else
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attrs
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end
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_ ->
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attrs
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end
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end
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defp extract_lat_from_ext_map(ext_map) when is_map(ext_map) and not is_struct(ext_map) do
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ext_map[:latitude] || ext_map["latitude"] ||
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(Map.has_key?(ext_map, :position) &&
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(ext_map[:position][:latitude] || ext_map[:position]["latitude"])) ||
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(Map.has_key?(ext_map, "position") &&
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(ext_map["position"][:latitude] || ext_map["position"]["latitude"]))
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end
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defp extract_lat_from_ext_map(_), do: nil
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defp extract_lon_from_ext_map(ext_map) when is_map(ext_map) and not is_struct(ext_map) do
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ext_map[:longitude] || ext_map["longitude"] ||
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(Map.has_key?(ext_map, :position) &&
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(ext_map[:position][:longitude] || ext_map[:position]["longitude"])) ||
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(Map.has_key?(ext_map, "position") &&
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(ext_map["position"][:longitude] || ext_map["position"]["longitude"]))
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end
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defp extract_lon_from_ext_map(_), do: nil
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defp set_lat_lon(attrs, lat, lon) do
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round6 = fn
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nil ->
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nil
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%Decimal{} = d ->
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Decimal.round(d, 6)
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n when is_float(n) ->
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Float.round(n, 6)
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n when is_integer(n) ->
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n * 1.0
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n when is_binary(n) ->
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case Float.parse(n) do
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{f, _} -> Float.round(f, 6)
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:error -> nil
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end
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_ ->
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nil
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end
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attrs
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|> Map.put(:lat, round6.(lat))
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|> Map.put(:lon, round6.(lon))
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end
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defp normalize_ssid(attrs) do
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case Map.get(attrs, :ssid) do
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nil -> attrs
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ssid -> Map.put(attrs, :ssid, to_string(ssid))
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end
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end
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defp insert_packet(attrs, packet_data) do
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# Ensure data_extended is properly sanitized before insertion
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attrs =
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if attrs[:data_extended] do
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sanitized_extended = Aprsme.EncodingUtils.sanitize_data_extended(attrs[:data_extended])
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# Double-check all values are sanitized
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# Only do additional sanitization for plain maps, not structs
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sanitized_extended =
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if is_struct(sanitized_extended) do
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sanitized_extended
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else
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Enum.reduce(sanitized_extended, %{}, fn {k, v}, acc ->
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sanitized_value = if is_binary(v), do: Aprsme.EncodingUtils.sanitize_string(v), else: v
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Map.put(acc, k, sanitized_value)
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end)
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end
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Map.put(attrs, :data_extended, sanitized_extended)
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else
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attrs
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end
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# Debug log to see what we're trying to insert
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if attrs[:data_extended] do
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require Logger
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Logger.debug("Final data_extended before insert: #{inspect(attrs[:data_extended], binaries: :as_binaries)}")
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end
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case %Packet{} |> Packet.changeset(attrs) |> Repo.insert() do
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{:ok, packet} ->
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# Invalidate cache for this packet's callsign
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if Map.has_key?(attrs, :sender) do
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Aprsme.CachedQueries.invalidate_callsign_cache(attrs.sender)
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end
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{:ok, packet}
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{:error, changeset} ->
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error_message =
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Enum.map_join(changeset.errors, ", ", fn {field, {msg, _}} -> "#{field}: #{msg}" end)
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store_bad_packet(packet_data, %{message: error_message, type: "ValidationError"})
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{:error, :validation_error}
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end
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end
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@doc """
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Stores a bad packet in the database.
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## Parameters
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* `packet_data` - The original packet data that failed to parse
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* `error` - The error that occurred during parsing
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"""
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@spec store_bad_packet(map() | String.t(), any()) ::
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{:ok, struct()} | {:error, Ecto.Changeset.t()}
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def store_bad_packet(packet_data, error) when is_binary(packet_data) do
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error_type =
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case error do
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%{type: type} -> type
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%{__struct__: struct} -> struct
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_ -> "UnknownError"
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end
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error_message =
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case error do
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%{message: message} -> message
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%{__struct__: _} -> Exception.message(error)
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_ -> inspect(error)
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end
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%BadPacket{}
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|> BadPacket.changeset(%{
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raw_packet: Aprsme.EncodingUtils.sanitize_string(packet_data),
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error_message: error_message,
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error_type: error_type,
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attempted_at: DateTime.utc_now()
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})
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|> Repo.insert()
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end
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def store_bad_packet(packet_data, error) when is_map(packet_data) do
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error_type =
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case error do
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%{type: type} -> type
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%{__struct__: struct} -> struct
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_ -> "UnknownError"
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end
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error_message =
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case error do
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%{message: message} -> message
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%{__struct__: _} -> Exception.message(error)
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_ -> inspect(error)
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end
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%BadPacket{}
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|> BadPacket.changeset(%{
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raw_packet: packet_data[:raw_packet] || packet_data["raw_packet"] || inspect(packet_data),
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error_message: error_message,
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error_type: error_type,
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attempted_at: DateTime.utc_now()
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})
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|> Repo.insert()
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end
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# Extracts position data from packet, checking various possible locations
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defp extract_position(packet_data) do
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# Check for lat/lon at top level
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if not is_nil(packet_data[:lat]) and not is_nil(packet_data[:lon]) do
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{to_float(packet_data.lat), to_float(packet_data.lon)}
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else
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extract_position_from_data_extended(packet_data[:data_extended])
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end
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end
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defp extract_position_from_data_extended(nil), do: {nil, nil}
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defp extract_position_from_data_extended(data_extended) when is_map(data_extended) do
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if has_standard_position?(data_extended) do
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extract_standard_position(data_extended)
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else
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extract_position_from_data_extended_case(data_extended)
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end
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end
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defp extract_position_from_data_extended(_), do: {nil, nil}
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defp has_standard_position?(data_extended) when is_map(data_extended) and not is_struct(data_extended) do
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not is_nil(data_extended[:latitude]) and not is_nil(data_extended[:longitude])
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end
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defp has_standard_position?(_), do: false
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defp extract_standard_position(data_extended) when is_map(data_extended) and not is_struct(data_extended) do
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{to_float(data_extended[:latitude]), to_float(data_extended[:longitude])}
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end
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defp extract_standard_position(_), do: {nil, nil}
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defp extract_position_from_data_extended_case(data_extended) do
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case data_extended do
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%{__struct__: MicE} = mic_e ->
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extract_position_from_mic_e_struct(mic_e)
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%{__struct__: Aprs.Types.ParseError} ->
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# ParseError structs don't contain position data and don't implement Access behavior
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{nil, nil}
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_ ->
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extract_position_from_mic_e(data_extended)
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end
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end
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defp extract_position_from_mic_e_struct(%{__struct__: MicE} = mic_e) do
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# Use Access behavior for MicE struct which implements it
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lat = mic_e[:latitude]
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lon = mic_e[:longitude]
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if is_number(lat) and is_number(lon) do
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{lat, lon}
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else
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{nil, nil}
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end
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end
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defp extract_position_from_mic_e(%{
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lat_degrees: lat_deg,
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lat_minutes: lat_min,
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lat_direction: lat_dir,
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lon_degrees: lon_deg,
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lon_minutes: lon_min,
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lon_direction: lon_dir
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})
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when is_number(lat_deg) and is_number(lat_min) and is_number(lon_deg) and is_number(lon_min) do
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lat = apply_direction(lat_deg + lat_min / 60.0, lat_dir, :south)
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lon = apply_direction(lon_deg + lon_min / 60.0, lon_dir, :west)
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{lat, lon}
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end
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defp extract_position_from_mic_e(_data_extended), do: {nil, nil}
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defp apply_direction(value, direction, negative_direction) when direction == negative_direction, do: -value
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defp apply_direction(value, _direction, _negative_direction), do: value
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defp get_canonical_device_identifier(device_identifier) do
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case Aprsme.DeviceIdentification.lookup_device_by_identifier(device_identifier) do
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%{identifier: canonical_id} -> canonical_id
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nil -> device_identifier
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end
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end
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@doc """
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Gets packets for replay.
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## Parameters
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* `opts` - Map of options for filtering and pagination:
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* `:lat` - Latitude for center point filtering
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* `:lon` - Longitude for center point filtering
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* `:radius` - Radius in kilometers for filtering
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* `:callsign` - Filter by callsign
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* `:region` - Filter by region
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* `:start_time` - Start time for replay (DateTime)
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* `:end_time` - End time for replay (DateTime)
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* `:limit` - Maximum number of packets to return
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* `:page` - Page number for pagination
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"""
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@impl true
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def get_packets_for_replay(opts \\ %{}) do
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limit = Map.get(opts, :limit, 1000)
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bounds = Map.get(opts, :bounds)
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query =
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from(p in Packet)
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|> QueryBuilder.with_position()
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|> QueryBuilder.with_time_range(opts)
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|> QueryBuilder.maybe_filter_region(opts)
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|> maybe_filter_by_callsign(opts)
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|> maybe_filter_by_bounds(bounds)
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|> QueryBuilder.chronological()
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|> QueryBuilder.paginate(limit)
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|> QueryBuilder.with_coordinates()
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Repo.all(query)
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end
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defp maybe_filter_by_callsign(query, %{callsign: callsign}) when not is_nil(callsign) do
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QueryBuilder.for_callsign(query, callsign)
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end
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defp maybe_filter_by_callsign(query, _), do: query
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defp maybe_filter_by_bounds(query, bounds) when is_list(bounds) and length(bounds) == 4 do
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QueryBuilder.within_bounds(query, bounds)
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end
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defp maybe_filter_by_bounds(query, _), do: query
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@doc """
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Gets historical packet count for a map area.
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"""
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@impl true
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@spec get_historical_packet_count(map()) :: non_neg_integer()
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def get_historical_packet_count(opts \\ %{}) do
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bounds = Map.get(opts, :bounds)
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query =
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from(p in Packet)
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|> QueryBuilder.with_position()
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|> QueryBuilder.with_time_range(opts)
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|> QueryBuilder.maybe_filter_region(opts)
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|> maybe_filter_by_callsign(opts)
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|> maybe_filter_by_bounds(bounds)
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|> select(count())
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case Repo.one(query) do
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nil -> 0
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count when is_integer(count) -> count
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_ -> 0
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end
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rescue
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_ -> 0
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end
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@doc """
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Gets recent packets for the map view.
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This is used for initial map loading to show only recent packets.
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"""
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@impl true
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@spec get_recent_packets(map()) :: [struct()]
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def get_recent_packets(opts \\ %{}) do
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# Use provided hours_back or default to 24 hours
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opts_with_time =
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if Map.has_key?(opts, :hours_back) do
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opts
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else
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Map.put(opts, :hours_back, 24)
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end
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opts_with_time
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|> QueryBuilder.recent_position_packets()
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|> Repo.all()
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end
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@doc """
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Gets recent packets optimized for initial map load.
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This uses a more efficient query pattern for the most common use case.
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"""
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@impl true
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@spec get_recent_packets_optimized(map()) :: [struct()]
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def get_recent_packets_optimized(opts \\ %{}) do
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# Use hours_back from opts if provided, otherwise default to 24 hours
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hours_back = Map.get(opts, :hours_back, 24)
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time_ago = DateTime.add(DateTime.utc_now(), -hours_back * 3600, :second)
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limit = Map.get(opts, :limit, 200)
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offset = Map.get(opts, :offset, 0)
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# Build base query with time and position filters
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base_query =
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from(p in Packet,
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where: p.has_position == true,
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where: p.received_at >= ^time_ago
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)
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# Apply spatial and other filters BEFORE limiting
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# This ensures we get the most recent packets within the specified bounds
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bounds = Map.get(opts, :bounds)
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query =
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base_query
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|> QueryBuilder.maybe_filter_region(opts)
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|> maybe_filter_by_callsign(opts)
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|> maybe_filter_by_bounds(bounds)
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|> order_by(desc: :received_at)
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|> limit(^limit)
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|> offset(^offset)
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|> QueryBuilder.with_coordinates()
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Repo.all(query)
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end
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@doc """
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Gets the closest stations to a given point.
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Uses PostGIS spatial indexes for efficient querying.
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Returns only the most recent packet per callsign, ordered by distance.
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"""
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@impl true
|
|
@spec get_nearby_stations(float(), float(), String.t() | nil, map()) :: [struct()]
|
|
def get_nearby_stations(lat, lon, exclude_callsign \\ nil, opts \\ %{}) do
|
|
limit = Map.get(opts, :limit, 10)
|
|
hours_back = Map.get(opts, :hours_back, 1)
|
|
cutoff_time = TimeUtils.hours_ago(hours_back)
|
|
|
|
# Use named prepared statement for better performance (future optimization)
|
|
# _statement_name = if exclude_callsign, do: "nearby_stations_exclude", else: "nearby_stations"
|
|
|
|
# Use DISTINCT ON for better performance than window functions
|
|
# First get most recent packet per callsign, then order by distance
|
|
# Add spatial bounds to use indexes effectively
|
|
query = """
|
|
SELECT * FROM (
|
|
SELECT DISTINCT ON (p.base_callsign)
|
|
p.*,
|
|
ST_Distance(p.location::geography, ST_SetSRID(ST_MakePoint($2, $1), 4326)::geography) as distance
|
|
FROM packets p
|
|
WHERE p.has_position = true
|
|
AND p.received_at >= $3
|
|
AND p.location IS NOT NULL
|
|
#{if exclude_callsign, do: "AND p.sender != $4", else: ""}
|
|
AND ST_DWithin(
|
|
p.location::geography,
|
|
ST_SetSRID(ST_MakePoint($2, $1), 4326)::geography,
|
|
100000 -- 100km radius for initial filtering
|
|
)
|
|
ORDER BY p.base_callsign, p.received_at DESC
|
|
) AS recent_packets
|
|
ORDER BY distance ASC
|
|
LIMIT #{if exclude_callsign, do: "$5", else: "$4"}
|
|
"""
|
|
|
|
params =
|
|
if exclude_callsign do
|
|
[lat, lon, cutoff_time, exclude_callsign, limit]
|
|
else
|
|
[lat, lon, cutoff_time, limit]
|
|
end
|
|
|
|
case Repo.query(query, params) do
|
|
{:ok, result} ->
|
|
Enum.map(result.rows, &Repo.load(Packet, {result.columns, &1}))
|
|
|
|
{:error, _} ->
|
|
[]
|
|
end
|
|
end
|
|
|
|
@doc """
|
|
Gets weather packets for a specific callsign within a time range.
|
|
This is optimized for weather queries by filtering at the database level.
|
|
"""
|
|
@impl true
|
|
@spec get_weather_packets(String.t(), DateTime.t(), DateTime.t(), map()) :: [struct()]
|
|
def get_weather_packets(callsign, start_time, end_time, opts \\ %{}) do
|
|
opts =
|
|
Map.merge(opts, %{
|
|
callsign: callsign,
|
|
start_time: start_time,
|
|
end_time: end_time,
|
|
limit: Map.get(opts, :limit, 500)
|
|
})
|
|
|
|
opts
|
|
|> QueryBuilder.weather_packets()
|
|
|> QueryBuilder.with_coordinates()
|
|
|> Repo.all()
|
|
end
|
|
|
|
# Filter for weather packets at the database level
|
|
|
|
@doc """
|
|
Retrieves a continuous stream of stored packets for replay in chronological order.
|
|
|
|
This function returns a Stream that can be used to process packets in chronological
|
|
order, preserving the timing between packets.
|
|
|
|
## Parameters
|
|
* `opts` - The same options as `get_packets_for_replay/1`
|
|
* `:playback_speed` - Speed multiplier (1.0 = real-time, 2.0 = 2x speed, etc.)
|
|
|
|
## Returns
|
|
* Stream of packets with timing information
|
|
"""
|
|
@impl true
|
|
def stream_packets_for_replay(opts \\ %{}) do
|
|
packets = get_packets_for_replay(opts)
|
|
playback_speed = Map.get(opts, :playback_speed, 1.0)
|
|
|
|
# Return a stream that emits packets with their original timing
|
|
Stream.unfold({packets, nil}, fn
|
|
{[], _} ->
|
|
nil
|
|
|
|
{[packet | rest], nil} ->
|
|
{{0, packet}, {rest, packet}}
|
|
|
|
{[next | rest], prev} ->
|
|
# Calculate delay between packets in milliseconds, then convert to seconds
|
|
delay_ms = DateTime.diff(next.received_at, prev.received_at, :millisecond)
|
|
adjusted_delay = delay_ms / (playback_speed * 1000)
|
|
{{adjusted_delay, next}, {rest, next}}
|
|
end)
|
|
end
|
|
|
|
@doc """
|
|
Gets the total count of stored packets in the database.
|
|
Uses the efficient packet_counters table with triggers for O(1) performance.
|
|
"""
|
|
@spec get_total_packet_count() :: non_neg_integer()
|
|
def get_total_packet_count do
|
|
# Use the PostgreSQL function for instant count retrieval
|
|
case Repo.query("SELECT get_packet_count()", []) do
|
|
{:ok, %{rows: [[count]]}} when is_integer(count) ->
|
|
count
|
|
|
|
{:ok, %{rows: [[nil]]}} ->
|
|
# Fallback to actual count if counter is not initialized
|
|
Repo.one(from p in Packet, select: count(p.id)) || 0
|
|
|
|
{:error, _} ->
|
|
# Try the faster counter table directly as a fallback
|
|
query = """
|
|
SELECT count FROM packet_counters
|
|
WHERE counter_type = 'total_packets'
|
|
LIMIT 1
|
|
"""
|
|
|
|
case Repo.query(query, []) do
|
|
{:ok, %{rows: [[count]]}} -> count
|
|
_ -> 0
|
|
end
|
|
end
|
|
rescue
|
|
DBConnection.ConnectionError ->
|
|
require Logger
|
|
|
|
Logger.warning("Database connection error in get_total_packet_count, returning 0")
|
|
0
|
|
|
|
error ->
|
|
require Logger
|
|
|
|
Logger.error("Error getting total packet count: #{inspect(error)}")
|
|
0
|
|
end
|
|
|
|
@doc """
|
|
Gets the timestamp of the oldest stored packet in the database.
|
|
Returns nil if no packets exist.
|
|
"""
|
|
@spec get_oldest_packet_timestamp() :: DateTime.t() | nil
|
|
def get_oldest_packet_timestamp do
|
|
Repo.one(
|
|
from p in Packet,
|
|
select: min(p.received_at)
|
|
)
|
|
rescue
|
|
_ -> nil
|
|
end
|
|
|
|
@doc """
|
|
Configure packet retention policy.
|
|
|
|
Packets are retained based on these rules:
|
|
- Default retention is 365 days (1 year) (configurable via :packet_retention_days)
|
|
- Returns the number of packets deleted
|
|
"""
|
|
@impl true
|
|
def clean_old_packets do
|
|
retention_days = Application.get_env(:aprsme, :packet_retention_days, 365)
|
|
cutoff_time = DateTime.add(DateTime.utc_now(), -retention_days * 86_400, :second)
|
|
|
|
{deleted_count, _} = Repo.delete_all(from(p in Packet, where: p.received_at < ^cutoff_time))
|
|
|
|
deleted_count
|
|
end
|
|
|
|
@doc """
|
|
Clean packets older than a specific number of days.
|
|
|
|
This function allows for more granular cleanup operations by specifying
|
|
the exact age threshold for packet deletion.
|
|
|
|
## Parameters
|
|
- `days` - Number of days to keep (packets older than this will be deleted)
|
|
|
|
## Returns
|
|
- Number of packets deleted
|
|
"""
|
|
@impl true
|
|
@spec clean_packets_older_than(pos_integer()) :: {:ok, non_neg_integer()} | {:error, any()}
|
|
def clean_packets_older_than(days) when is_integer(days) and days > 0 do
|
|
cutoff_time = DateTime.add(DateTime.utc_now(), -days * 86_400, :second)
|
|
|
|
{deleted_count, _} = Repo.delete_all(from(p in Packet, where: p.received_at < ^cutoff_time))
|
|
|
|
{:ok, deleted_count}
|
|
end
|
|
|
|
# Helper to convert various types to float
|
|
defp to_float(value), do: Aprsme.EncodingUtils.to_float(value)
|
|
|
|
# Helper to convert various types to Decimal
|
|
defp to_decimal(value), do: Aprsme.EncodingUtils.to_decimal(value)
|
|
|
|
# Get packets from last hour only - used to initialize the map
|
|
@spec get_last_hour_packets() :: [struct()]
|
|
def get_last_hour_packets do
|
|
%{hours_back: 1, limit: 500}
|
|
|> QueryBuilder.recent_position_packets()
|
|
|> QueryBuilder.chronological()
|
|
|> Repo.all()
|
|
rescue
|
|
error ->
|
|
Logger.error("Failed to get last hour packets: #{inspect(error)}")
|
|
[]
|
|
end
|
|
|
|
# @doc """
|
|
# Spatial query functions for efficient location-based searches using PostGIS
|
|
# """
|
|
|
|
# Temporarily commented out PostGIS functions until PostGIS is properly configured
|
|
|
|
# @doc """
|
|
# Find packets within a given radius (in meters) of a point.
|
|
# Uses PostGIS spatial indexes for efficient querying.
|
|
# """
|
|
# def find_packets_within_radius(lat, lon, radius_meters, opts \\ %{}) do
|
|
# point = %Geo.Point{coordinates: {lon, lat}, srid: 4326}
|
|
|
|
# base_query =
|
|
# Packet
|
|
# |> where([p], not is_nil(p.location))
|
|
# |> where([p], st_dwithin_in_meters(p.location, ^point, ^radius_meters))
|
|
# |> order_by([p], st_distance(p.location, ^point))
|
|
|
|
# base_query
|
|
# |> apply_common_filters(opts)
|
|
# |> maybe_limit(opts)
|
|
# |> Repo.all()
|
|
# end
|
|
|
|
# Additional PostGIS functions commented out for now...
|
|
|
|
# Helper functions for spatial queries - commented out for now
|
|
|
|
# defp apply_common_filters(query, opts) do
|
|
# query
|
|
# |> filter_by_time_range(opts)
|
|
# |> filter_by_callsign(opts)
|
|
# |> filter_by_data_type(opts)
|
|
# end
|
|
|
|
# defp filter_by_time_range(query, %{start_time: start_time, end_time: end_time}) do
|
|
# from p in query,
|
|
# where: p.received_at >= ^start_time and p.received_at <= ^end_time
|
|
# end
|
|
|
|
# defp filter_by_time_range(query, %{start_time: start_time}) do
|
|
# from p in query, where: p.received_at >= ^start_time
|
|
# end
|
|
|
|
# defp filter_by_time_range(query, %{end_time: end_time}) do
|
|
# from p in query, where: p.received_at <= ^end_time
|
|
# end
|
|
|
|
# defp filter_by_time_range(query, %{hours_back: hours}) do
|
|
# cutoff_time = DateTime.utc_now() |> DateTime.add(-hours, :hour)
|
|
# from p in query, where: p.received_at >= ^cutoff_time
|
|
# end
|
|
|
|
# defp filter_by_time_range(query, _), do: query
|
|
|
|
# defp filter_by_data_type(query, %{data_type: data_type}) do
|
|
# from p in query, where: p.data_type == ^data_type
|
|
# end
|
|
|
|
# defp filter_by_data_type(query, _), do: query
|
|
|
|
# defp maybe_limit(query, %{limit: limit}) when is_integer(limit) and limit > 0 do
|
|
# from p in query, limit: ^limit
|
|
# end
|
|
|
|
# defp maybe_limit(query, _), do: query
|
|
|
|
# Calculate clustering distance based on zoom level
|
|
# Higher zoom levels need smaller clustering distances
|
|
# defp calculate_cluster_distance(zoom_level) when zoom_level >= 15, do: 100 # 100m
|
|
# defp calculate_cluster_distance(zoom_level) when zoom_level >= 12, do: 500 # 500m
|
|
# defp calculate_cluster_distance(zoom_level) when zoom_level >= 9, do: 2000 # 2km
|
|
# defp calculate_cluster_distance(zoom_level) when zoom_level >= 6, do: 10000 # 10km
|
|
# defp calculate_cluster_distance(_), do: 50000 # 50km
|
|
|
|
@doc """
|
|
Gets the most recent packet for a callsign regardless of type or age.
|
|
This is used for API endpoints that need the latest packet from a source.
|
|
"""
|
|
@spec get_latest_packet_for_callsign(String.t()) :: struct() | nil
|
|
def get_latest_packet_for_callsign(callsign) when is_binary(callsign) do
|
|
callsign
|
|
|> QueryBuilder.callsign_history(%{limit: 1})
|
|
|> QueryBuilder.with_coordinates()
|
|
|> Repo.one()
|
|
end
|
|
|
|
@doc """
|
|
Gets the most recent weather packet for a callsign.
|
|
Looks for any packet containing weather data fields.
|
|
"""
|
|
@spec get_latest_weather_packet(String.t()) :: struct() | nil
|
|
def get_latest_weather_packet(callsign) when is_binary(callsign) do
|
|
# First try last 24 hours
|
|
one_day_ago = TimeUtils.one_day_ago()
|
|
|
|
recent_packet =
|
|
Repo.one(
|
|
from(p in Packet,
|
|
where: p.sender == ^callsign,
|
|
where:
|
|
not is_nil(p.temperature) or not is_nil(p.humidity) or not is_nil(p.pressure) or
|
|
not is_nil(p.wind_speed) or not is_nil(p.wind_direction) or not is_nil(p.rain_1h),
|
|
where: p.received_at >= ^one_day_ago,
|
|
order_by: [desc: p.received_at],
|
|
limit: 1
|
|
)
|
|
)
|
|
|
|
case recent_packet do
|
|
nil ->
|
|
# If no recent packet, expand to 7 days
|
|
one_week_ago = TimeUtils.one_week_ago()
|
|
|
|
Repo.one(
|
|
from(p in Packet,
|
|
where: p.sender == ^callsign,
|
|
where:
|
|
not is_nil(p.temperature) or not is_nil(p.humidity) or not is_nil(p.pressure) or
|
|
not is_nil(p.wind_speed) or not is_nil(p.wind_direction) or not is_nil(p.rain_1h),
|
|
where: p.received_at >= ^one_week_ago,
|
|
order_by: [desc: p.received_at],
|
|
limit: 1
|
|
)
|
|
)
|
|
|
|
packet ->
|
|
packet
|
|
end
|
|
end
|
|
end
|