83 lines
2.4 KiB
Elixir
83 lines
2.4 KiB
Elixir
defmodule AprsmeWeb.MapLive.UrlParams do
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@moduledoc """
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Handles URL parameter parsing, validation, and sanitization for the map LiveView.
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"""
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alias AprsmeWeb.Live.Shared.CoordinateUtils
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alias AprsmeWeb.Live.Shared.ParamUtils
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@default_center %{lat: 39.8283, lng: -98.5795}
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@default_zoom 5
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@doc """
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Parse map state from URL parameters.
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Returns {map_center, zoom} tuple with validated coordinates.
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"""
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@spec parse_map_params(map()) :: {map(), integer()}
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def parse_map_params(params) do
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lat = parse_latitude(Map.get(params, "lat"))
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lng = parse_longitude(Map.get(params, "lng"))
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zoom = parse_zoom(Map.get(params, "z"))
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map_center = %{lat: lat, lng: lng}
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{map_center, zoom}
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end
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@doc """
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Parse and validate latitude parameter.
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"""
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@spec parse_latitude(binary() | nil) :: float()
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def parse_latitude(nil), do: @default_center.lat
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def parse_latitude(lat_str) do
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ParamUtils.parse_float_in_range(lat_str, @default_center.lat, -90, 90)
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end
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@doc """
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Parse and validate longitude parameter.
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"""
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@spec parse_longitude(binary() | nil) :: float()
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def parse_longitude(nil), do: @default_center.lng
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def parse_longitude(lng_str) do
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ParamUtils.parse_float_in_range(lng_str, @default_center.lng, -180, 180)
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end
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@doc """
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Parse and validate zoom parameter.
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"""
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@spec parse_zoom(binary() | nil) :: integer()
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def parse_zoom(nil), do: @default_zoom
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def parse_zoom(zoom_str) do
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ParamUtils.parse_int_in_range(zoom_str, @default_zoom, 1, 20)
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end
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# Delegate to shared utilities
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defdelegate parse_float_in_range(str, default, min, max), to: ParamUtils
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defdelegate parse_int_in_range(str, default, min, max), to: ParamUtils
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defdelegate sanitize_numeric_string(str), to: ParamUtils
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defdelegate limit_string_length(str, max_length), to: ParamUtils
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defdelegate finite?(float), to: ParamUtils
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defdelegate valid_coordinates?(lat, lng), to: CoordinateUtils
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@doc """
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Check if URL parameters explicitly specify map location.
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"""
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@spec has_explicit_url_params?(map()) :: boolean()
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def has_explicit_url_params?(params) do
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!!(params["lat"] || params["lng"] || params["z"])
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end
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@doc """
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Get default map center coordinates.
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"""
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@spec default_center() :: map()
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def default_center, do: @default_center
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@doc """
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Get default zoom level.
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"""
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@spec default_zoom() :: integer()
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def default_zoom, do: @default_zoom
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end
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