Graham McIntire
b4b8d4ec47
- Create MaidenheadChangesetHelpers: consolidate grid validation, callsign normalization, lat/lon validation, grid/latlon derivation across 6 schemas - Create ContextHelpers: shared fetch_owned with admin bypass, safe_enqueue for Oban workers, UUID casting to replace CastError rescues - Extend LiveHelpers: add current_user/1 (removes 7 duplicate definitions), subscribe/2 (replaces 13 inline PubSub sites), assign_url_params/2 - Extract Propagation.ScoreStore (528 lines): separate file I/O and cache management from scoring logic, 13 defdelegate passthroughs - Split SubmitLive (942->475 lines): extract CSV/ADIF upload rendering into 3 function component modules (csv_upload, adif_upload, preview) - Update 16 LiveViews to use shared helpers
83 lines
3 KiB
Elixir
83 lines
3 KiB
Elixir
defmodule MicrowavepropWeb.LiveHelpers do
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@moduledoc """
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Small helpers shared across LiveView modules. Use sparingly — most
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view-specific logic belongs in its own LiveView.
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"""
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# ── Parse helpers ────────────────────────────────────────────────────
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alias Phoenix.LiveView.Socket
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@doc """
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Parses a value into a float, returning `default` for nil, empty, or
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unparseable input. Accepts strings, numbers, or any value with a
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`String.Chars` impl.
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"""
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@spec parse_float(term(), float()) :: float()
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def parse_float(nil, default), do: default
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def parse_float("", default), do: default
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def parse_float(value, default) do
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case value |> to_string() |> Float.parse() do
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{n, _} -> n
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:error -> default
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end
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end
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@doc """
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Parses a value into an integer, returning `default` for nil, empty,
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or unparseable input.
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"""
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@spec parse_int(term(), integer()) :: integer()
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def parse_int(nil, default), do: default
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def parse_int("", default), do: default
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def parse_int(value, default) do
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case value |> to_string() |> Integer.parse() do
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{n, _} -> n
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:error -> default
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end
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end
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# ── User helpers ─────────────────────────────────────────────────────
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@doc """
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Extracts the current user from a LiveView socket or assigns map.
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Returns the `%User{}` struct or `nil` if not authenticated.
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"""
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@spec current_user(Socket.t() | map()) :: Ecto.Schema.t() | nil
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def current_user(%Socket{assigns: assigns}) do
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current_user(assigns)
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end
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@spec current_user(map()) :: Ecto.Schema.t() | nil
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def current_user(%{current_scope: %{user: %_{} = user}}), do: user
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def current_user(%{user: %_{} = user}), do: user
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def current_user(_), do: nil
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# ── PubSub helpers ───────────────────────────────────────────────────
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@doc """
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Subscribes the socket to a Phoenix.PubSub topic, but only when the
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socket is connected (WebSocket). Safe to call unconditionally in mount/3.
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"""
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@spec subscribe(Socket.t(), String.t()) :: :ok
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def subscribe(%Socket{} = socket, topic) when is_binary(topic) do
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if Phoenix.LiveView.connected?(socket) do
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Phoenix.PubSub.subscribe(Microwaveprop.PubSub, topic)
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end
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:ok
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end
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# ── URL helpers ──────────────────────────────────────────────────────
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@doc """
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Merges URL params with defaults for handle_params/3. Returns a map of
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merged values suitable for assigning to the socket.
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"""
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@spec assign_url_params(map(), map()) :: map()
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def assign_url_params(params, defaults) when is_map(params) and is_map(defaults) do
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Map.merge(defaults, Map.take(params, Map.keys(defaults)))
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end
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end
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