Use Timex for flexible CSV timestamp parsing with tests

- Add timex ~> 3.7, downgrade gettext to ~> 0.26 for compatibility
- Parse ISO 8601, US dates (M/D/YYYY), AM/PM, 24h, compact formats
- 22 tests covering all accepted timestamp formats and edge cases
- Integration tests for CSV import with US date and space-separated formats

lib/microwaveprop/radio/csv_import.ex

@@ -86,73 +86,51 @@ defmodule Microwaveprop.Radio.CsvImport do
     end
   end
 
-  @doc """
+  @timestamp_formats [
-  Parses various date/time formats into ISO 8601 UTC strings.
+    "{ISO:Extended:Z}",
+    "{ISO:Extended}",
+    "{YYYY}-{0M}-{0D}T{h24}:{0m}:{0s}",
+    "{YYYY}-{0M}-{0D}T{h24}:{0m}",
+    "{YYYY}-{0M}-{0D} {h24}:{0m}:{0s}",
+    "{YYYY}-{0M}-{0D} {h24}:{0m}",
+    "{YYYY}-{0M}-{0D}",
+    "{M}/{D}/{YYYY} {h12}:{m} {AM}",
+    "{0M}/{0D}/{YYYY} {h12}:{0m} {AM}",
+    "{M}/{D}/{YYYY} {h24}:{m}:{s}",
+    "{M}/{D}/{YYYY} {h24}:{m}",
+    "{0M}/{0D}/{YYYY} {h24}:{0m}:{0s}",
+    "{0M}/{0D}/{YYYY} {h24}:{0m}",
+    "{M}-{D}-{YYYY} {h24}:{m}",
+    "{0M}-{0D}-{YYYY} {h24}:{0m}:{0s}",
+    "{0M}-{0D}-{YYYY} {h24}:{0m}",
+    "{YYYY}{0M}{0D}T{h24}{0m}{0s}",
+    "{YYYY}{0M}{0D} {h24}{0m}"
+  ]
 
-  Accepted formats:
+  @doc """
-    - ISO 8601: 2024-06-15T14:30:00Z, 2024-06-15 14:30:00Z, 2024-06-15T14:30:00
+  Parses various date/time formats into ISO 8601 UTC strings using Timex.
-    - US date: 06/15/2024 14:30, 6/15/2024 2:30 PM
+  All times are assumed UTC.
-    - US date: 06-15-2024 14:30
-    - EU date: 15/06/2024 14:30
-    - Date only: 2024-06-15 (assumes 00:00 UTC)
-    - Compact: 20240615 1430, 20240615T143000
   """
   def normalize_timestamp(raw) do
     trimmed = String.trim(raw)
 
-    cond do
+    @timestamp_formats
-      # Already ISO 8601 with timezone
+    |> Enum.find_value(fn fmt ->
-      match?({:ok, _, _}, DateTime.from_iso8601(trimmed)) ->
+      case Timex.parse(trimmed, fmt) do
-        {:ok, trimmed}
+        {:ok, parsed} ->
+          dt = Timex.to_datetime(parsed, "Etc/UTC")
+          {:ok, DateTime.to_iso8601(dt)}
 
-      # ISO-ish without Z: 2024-06-15T14:30:00 or 2024-06-15 14:30:00
+        _ ->
-      Regex.match?(~r/^\d{4}-\d{2}-\d{2}[T ]\d{2}:\d{2}(:\d{2})?$/, trimmed) ->
+          nil
-        {:ok, trimmed <> "Z"}
+      end
-
+    end)
-      # Date only: 2024-06-15
+    |> case do
-      Regex.match?(~r/^\d{4}-\d{2}-\d{2}$/, trimmed) ->
+      {:ok, _} = ok -> ok
-        {:ok, trimmed <> "T00:00:00Z"}
+      nil -> {:error, "qso_timestamp could not be parsed: #{trimmed}"}
-
-      # US format with AM/PM: 6/15/2024 2:30 PM or 06/15/2024 02:30 PM
-      match = Regex.run(~r"^(\d{1,2})/(\d{1,2})/(\d{4})\s+(\d{1,2}):(\d{2})\s*(AM|PM)$"i, trimmed) ->
-        [_, m, d, y, h, min, ampm] = match
-        hour = parse_12h(String.to_integer(h), String.upcase(ampm))
-        format_iso(y, m, d, hour, min)
-
-      # US format 24h: 6/15/2024 14:30 or 06/15/2024 14:30:00
-      match = Regex.run(~r"^(\d{1,2})/(\d{1,2})/(\d{4})\s+(\d{1,2}):(\d{2})(:\d{2})?$", trimmed) ->
-        [_, m, d, y, h, min | _] = match
-        format_iso(y, m, d, String.to_integer(h), min)
-
-      # US format with dashes: 06-15-2024 14:30
-      match = Regex.run(~r"^(\d{1,2})-(\d{1,2})-(\d{4})\s+(\d{1,2}):(\d{2})(:\d{2})?$", trimmed) ->
-        [_, m, d, y, h, min | _] = match
-        format_iso(y, m, d, String.to_integer(h), min)
-
-      # Compact: 20240615 1430 or 20240615T143000
-      match = Regex.run(~r"^(\d{4})(\d{2})(\d{2})[T ]?(\d{2})(\d{2})(\d{2})?$", trimmed) ->
-        [_, y, m, d, h, min | _] = match
-        format_iso(y, m, d, String.to_integer(h), min)
-
-      true ->
-        {:error, "qso_timestamp could not be parsed: #{trimmed}"}
     end
   end
 
-  defp parse_12h(12, "AM"), do: 0
-  defp parse_12h(12, "PM"), do: 12
-  defp parse_12h(h, "PM"), do: h + 12
-  defp parse_12h(h, "AM"), do: h
-
-  defp format_iso(y, m, d, hour, min) do
-    y = String.pad_leading(to_string(y), 4, "0")
-    m = String.pad_leading(to_string(m), 2, "0")
-    d = String.pad_leading(to_string(d), 2, "0")
-    h = String.pad_leading(to_string(hour), 2, "0")
-    min = String.pad_leading(to_string(min), 2, "0")
-    {:ok, "#{y}-#{m}-#{d}T#{h}:#{min}:00Z"}
-  end
-
   defp changeset_error_strings(changeset) do
     changeset
     |> Ecto.Changeset.traverse_errors(fn {message, opts} ->

mix.exs

@@ -58,7 +58,7 @@ defmodule Microwaveprop.MixProject do
       {:req, "~> 0.5"},
       {:telemetry_metrics, "~> 1.0"},
       {:telemetry_poller, "~> 1.0"},
-      {:gettext, "~> 1.0"},
+      {:gettext, "~> 0.26"},
       {:jason, "~> 1.2"},
       {:dns_cluster, "~> 0.2.0"},
       {:bandit, "~> 1.5"},
@@ -70,7 +70,8 @@ defmodule Microwaveprop.MixProject do
       {:axon, "~> 0.7", only: [:dev, :test]},
       {:exla, "~> 0.9", only: [:dev, :test]},
       {:polaris, "~> 0.1", only: [:dev, :test]},
-      {:tidewave, "~> 0.5", only: :dev}
+      {:tidewave, "~> 0.5", only: :dev},
+      {:timex, "~> 3.7"}
     ]
   end
 

mix.lock

@@ -3,7 +3,9 @@
   "bandit": {:hex, :bandit, "1.10.4", "02b9734c67c5916a008e7eb7e2ba68aaea6f8177094a5f8d95f1fb99069aac17", [:mix], [{:hpax, "~> 1.0", [hex: :hpax, repo: "hexpm", optional: false]}, {:plug, "~> 1.18", [hex: :plug, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}, {:thousand_island, "~> 1.0", [hex: :thousand_island, repo: "hexpm", optional: false]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "a5faf501042ac1f31d736d9d4a813b3db4ef812e634583b6a457b0928798a51d"},
   "bunt": {:hex, :bunt, "1.0.0", "081c2c665f086849e6d57900292b3a161727ab40431219529f13c4ddcf3e7a44", [:mix], [], "hexpm", "dc5f86aa08a5f6fa6b8096f0735c4e76d54ae5c9fa2c143e5a1fc7c1cd9bb6b5"},
   "cc_precompiler": {:hex, :cc_precompiler, "0.1.11", "8c844d0b9fb98a3edea067f94f616b3f6b29b959b6b3bf25fee94ffe34364768", [:mix], [{:elixir_make, "~> 0.7", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "3427232caf0835f94680e5bcf082408a70b48ad68a5f5c0b02a3bea9f3a075b9"},
+  "certifi": {:hex, :certifi, "2.15.0", "0e6e882fcdaaa0a5a9f2b3db55b1394dba07e8d6d9bcad08318fb604c6839712", [:rebar3], [], "hexpm", "b147ed22ce71d72eafdad94f055165c1c182f61a2ff49df28bcc71d1d5b94a60"},
   "circular_buffer": {:hex, :circular_buffer, "1.0.0", "25c004da0cba7bd8bc1bdabded4f9a902d095e20600fd15faf1f2ffbaea18a07", [:mix], [], "hexpm", "c829ec31c13c7bafd1f546677263dff5bfb006e929f25635878ac3cfba8749e5"},
+  "combine": {:hex, :combine, "0.10.0", "eff8224eeb56498a2af13011d142c5e7997a80c8f5b97c499f84c841032e429f", [:mix], [], "hexpm", "1b1dbc1790073076580d0d1d64e42eae2366583e7aecd455d1215b0d16f2451b"},
   "complex": {:hex, :complex, "0.6.0", "b0130086a7a8c33574d293b2e0e250f4685580418eac52a5658a4bd148f3ccf1", [:mix], [], "hexpm", "0a5fa95580dcaf30fcd60fe1aaf24327c0fe401e98c24d892e172e79498269f9"},
   "credo": {:hex, :credo, "1.7.17", "f92b6aa5b26301eaa5a35e4d48ebf5aa1e7094ac00ae38f87086c562caf8a22f", [:mix], [{:bunt, "~> 0.2.1 or ~> 1.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2 or ~> 1.0", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "1eb5645c835f0b6c9b5410f94b5a185057bcf6d62a9c2b476da971cde8749645"},
   "db_connection": {:hex, :db_connection, "2.9.0", "a6a97c5c958a2d7091a58a9be40caf41ab496b0701d21e1d1abff3fa27a7f371", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "17d502eacaf61829db98facf6f20808ed33da6ccf495354a41e64fe42f9c509c"},
@@ -19,18 +21,22 @@
   "file_system": {:hex, :file_system, "1.1.1", "31864f4685b0148f25bd3fbef2b1228457c0c89024ad67f7a81a3ffbc0bbad3a", [:mix], [], "hexpm", "7a15ff97dfe526aeefb090a7a9d3d03aa907e100e262a0f8f7746b78f8f87a5d"},
   "finch": {:hex, :finch, "0.21.0", "b1c3b2d48af02d0c66d2a9ebfb5622be5c5ecd62937cf79a88a7f98d48a8290c", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.6.2 or ~> 1.7", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4 or ~> 1.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 1.1", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "87dc6e169794cb2570f75841a19da99cfde834249568f2a5b121b809588a4377"},
   "fine": {:hex, :fine, "0.1.4", "b19a89c1476c7c57afb5f9314aed5960b5bc95d5277de4cb5ee8e1d1616ce379", [:mix], [], "hexpm", "be3324cc454a42d80951cf6023b9954e9ff27c6daa255483b3e8d608670303f5"},
-  "gettext": {:hex, :gettext, "1.0.2", "5457e1fd3f4abe47b0e13ff85086aabae760497a3497909b8473e0acee57673b", [:mix], [{:expo, "~> 0.5.1 or ~> 1.0", [hex: :expo, repo: "hexpm", optional: false]}], "hexpm", "eab805501886802071ad290714515c8c4a17196ea76e5afc9d06ca85fb1bfeb3"},
+  "gettext": {:hex, :gettext, "0.26.2", "5978aa7b21fada6deabf1f6341ddba50bc69c999e812211903b169799208f2a8", [:mix], [{:expo, "~> 0.5.1 or ~> 1.0", [hex: :expo, repo: "hexpm", optional: false]}], "hexpm", "aa978504bcf76511efdc22d580ba08e2279caab1066b76bb9aa81c4a1e0a32a5"},
+  "hackney": {:hex, :hackney, "1.25.0", "390e9b83f31e5b325b9f43b76e1a785cbdb69b5b6cd4e079aa67835ded046867", [:rebar3], [{:certifi, "~> 2.15.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~> 6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~> 1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.4", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.4.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~> 0.7.1", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "7209bfd75fd1f42467211ff8f59ea74d6f2a9e81cbcee95a56711ee79fd6b1d4"},
   "heroicons": {:git, "https://github.com/tailwindlabs/heroicons.git", "0435d4ca364a608cc75e2f8683d374e55abbae26", [tag: "v2.2.0", sparse: "optimized", depth: 1]},
   "hpax": {:hex, :hpax, "1.0.3", "ed67ef51ad4df91e75cc6a1494f851850c0bd98ebc0be6e81b026e765ee535aa", [:mix], [], "hexpm", "8eab6e1cfa8d5918c2ce4ba43588e894af35dbd8e91e6e55c817bca5847df34a"},
   "idna": {:hex, :idna, "6.1.1", "8a63070e9f7d0c62eb9d9fcb360a7de382448200fbbd1b106cc96d3d8099df8d", [:rebar3], [{:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "92376eb7894412ed19ac475e4a86f7b413c1b9fbb5bd16dccd57934157944cea"},
   "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "lazy_html": {:hex, :lazy_html, "0.1.10", "ffe42a0b4e70859cf21a33e12a251e0c76c1dff76391609bd56702a0ef5bc429", [:make, :mix], [{:cc_precompiler, "~> 0.1", [hex: :cc_precompiler, repo: "hexpm", optional: false]}, {:elixir_make, "~> 0.9.0", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:fine, "~> 0.1.0", [hex: :fine, repo: "hexpm", optional: false]}], "hexpm", "50f67e5faa09d45a99c1ddf3fac004f051997877dc8974c5797bb5ccd8e27058"},
+  "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm", "69b09adddc4f74a40716ae54d140f93beb0fb8978d8636eaded0c31b6f099f16"},
   "mime": {:hex, :mime, "2.0.7", "b8d739037be7cd402aee1ba0306edfdef982687ee7e9859bee6198c1e7e2f128", [:mix], [], "hexpm", "6171188e399ee16023ffc5b76ce445eb6d9672e2e241d2df6050f3c771e80ccd"},
+  "mimerl": {:hex, :mimerl, "1.4.0", "3882a5ca67fbbe7117ba8947f27643557adec38fa2307490c4c4207624cb213b", [:rebar3], [], "hexpm", "13af15f9f68c65884ecca3a3891d50a7b57d82152792f3e19d88650aa126b144"},
   "mint": {:hex, :mint, "1.7.1", "113fdb2b2f3b59e47c7955971854641c61f378549d73e829e1768de90fc1abf1", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:hpax, "~> 0.1.1 or ~> 0.2.0 or ~> 1.0", [hex: :hpax, repo: "hexpm", optional: false]}], "hexpm", "fceba0a4d0f24301ddee3024ae116df1c3f4bb7a563a731f45fdfeb9d39a231b"},
   "nimble_options": {:hex, :nimble_options, "1.1.1", "e3a492d54d85fc3fd7c5baf411d9d2852922f66e69476317787a7b2bb000a61b", [:mix], [], "hexpm", "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44"},
   "nimble_pool": {:hex, :nimble_pool, "1.1.0", "bf9c29fbdcba3564a8b800d1eeb5a3c58f36e1e11d7b7fb2e084a643f645f06b", [:mix], [], "hexpm", "af2e4e6b34197db81f7aad230c1118eac993acc0dae6bc83bac0126d4ae0813a"},
   "nx": {:hex, :nx, "0.11.0", "d37723dbd6cfa274a5def6d6664f5680c32e2eb8a1ce25ec6d91751967fa0abf", [:mix], [{:complex, "~> 0.6", [hex: :complex, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4.0 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "36157b21239aeb251d6cbac23eb0eb3495a5e1e0cbc2e6df16afd2ede1575205"},
   "oban": {:hex, :oban, "2.21.1", "4b6af7b901ef9baca09e239b5a991ef2fa429cf5a13799bc429a131d610ff692", [:mix], [{:ecto_sql, "~> 3.10", [hex: :ecto_sql, repo: "hexpm", optional: false]}, {:ecto_sqlite3, "~> 0.9", [hex: :ecto_sqlite3, repo: "hexpm", optional: true]}, {:igniter, "~> 0.5", [hex: :igniter, repo: "hexpm", optional: true]}, {:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: true]}, {:myxql, "~> 0.7", [hex: :myxql, repo: "hexpm", optional: true]}, {:postgrex, "~> 0.20", [hex: :postgrex, repo: "hexpm", optional: true]}, {:telemetry, "~> 1.3", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "8162a160924cf4a25905fed2a9242e7787d88e320e3b5b0dcf324eb17c51c4e6"},
+  "parse_trans": {:hex, :parse_trans, "3.4.1", "6e6aa8167cb44cc8f39441d05193be6e6f4e7c2946cb2759f015f8c56b76e5ff", [:rebar3], [], "hexpm", "620a406ce75dada827b82e453c19cf06776be266f5a67cff34e1ef2cbb60e49a"},
   "phoenix": {:hex, :phoenix, "1.8.5", "919db335247e6d4891764dc3063415b0d2457641c5f9b3751b5df03d8e20bbcf", [:mix], [{:bandit, "~> 1.0", [hex: :bandit, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:phoenix_pubsub, "~> 2.1", [hex: :phoenix_pubsub, repo: "hexpm", optional: false]}, {:phoenix_template, "~> 1.0", [hex: :phoenix_template, repo: "hexpm", optional: false]}, {:phoenix_view, "~> 2.0", [hex: :phoenix_view, repo: "hexpm", optional: true]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 2.7", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:plug_crypto, "~> 1.2 or ~> 2.0", [hex: :plug_crypto, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}, {:websock_adapter, "~> 0.5.3", [hex: :websock_adapter, repo: "hexpm", optional: false]}], "hexpm", "83b2bb125127e02e9f475c8e3e92736325b5b01b0b9b05407bcb4083b7a32485"},
   "phoenix_ecto": {:hex, :phoenix_ecto, "4.7.0", "75c4b9dfb3efdc42aec2bd5f8bccd978aca0651dbcbc7a3f362ea5d9d43153c6", [:mix], [{:ecto, "~> 3.5", [hex: :ecto, repo: "hexpm", optional: false]}, {:phoenix_html, "~> 2.14.2 or ~> 3.0 or ~> 4.1", [hex: :phoenix_html, repo: "hexpm", optional: true]}, {:plug, "~> 1.9", [hex: :plug, repo: "hexpm", optional: false]}, {:postgrex, "~> 0.16 or ~> 1.0", [hex: :postgrex, repo: "hexpm", optional: true]}], "hexpm", "1d75011e4254cb4ddf823e81823a9629559a1be93b4321a6a5f11a5306fbf4cc"},
   "phoenix_html": {:hex, :phoenix_html, "4.3.0", "d3577a5df4b6954cd7890c84d955c470b5310bb49647f0a114a6eeecc850f7ad", [:mix], [], "hexpm", "3eaa290a78bab0f075f791a46a981bbe769d94bc776869f4f3063a14f30497ad"},
@@ -44,6 +50,7 @@
   "polaris": {:hex, :polaris, "0.1.0", "dca61b18e3e801ecdae6ac9f0eca5f19792b44a5cb4b8d63db50fc40fc038d22", [:mix], [{:nx, "~> 0.5", [hex: :nx, repo: "hexpm", optional: false]}], "hexpm", "13ef2b166650e533cb24b10e2f3b8ab4f2f449ba4d63156e8c569527f206e2c2"},
   "postgrex": {:hex, :postgrex, "0.22.0", "fb027b58b6eab1f6de5396a2abcdaaeb168f9ed4eccbb594e6ac393b02078cbd", [:mix], [{:db_connection, "~> 2.9", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 1.5 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:table, "~> 0.1.0", [hex: :table, repo: "hexpm", optional: true]}], "hexpm", "a68c4261e299597909e03e6f8ff5a13876f5caadaddd0d23af0d0a61afcc5d84"},
   "req": {:hex, :req, "0.5.17", "0096ddd5b0ed6f576a03dde4b158a0c727215b15d2795e59e0916c6971066ede", [:mix], [{:brotli, "~> 0.3.1", [hex: :brotli, repo: "hexpm", optional: true]}, {:ezstd, "~> 1.0", [hex: :ezstd, repo: "hexpm", optional: true]}, {:finch, "~> 0.17", [hex: :finch, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mime, "~> 2.0.6 or ~> 2.1", [hex: :mime, repo: "hexpm", optional: false]}, {:nimble_csv, "~> 1.0", [hex: :nimble_csv, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "0b8bc6ffdfebbc07968e59d3ff96d52f2202d0536f10fef4dc11dc02a2a43e39"},
+  "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
   "styler": {:hex, :styler, "1.11.0", "35010d970689a23c2bcc8e97bd8bf7d20e3561d60c49be84654df5c37d051a9c", [:mix], [], "hexpm", "70f36165d0cf238a32b7a456fdef6a9c72e77e657d7ac4a0ace33aeba3f2b8c0"},
   "swoosh": {:hex, :swoosh, "1.24.0", "4df9645aeeef925a2eb10f7a588a6a09ddd6d370c5dfbd3e821b699c574bdf57", [:mix], [{:bandit, ">= 1.0.0", [hex: :bandit, repo: "hexpm", optional: true]}, {:cowboy, "~> 1.1 or ~> 2.4", [hex: :cowboy, repo: "hexpm", optional: true]}, {:ex_aws, "~> 2.1", [hex: :ex_aws, repo: "hexpm", optional: true]}, {:finch, "~> 0.6", [hex: :finch, repo: "hexpm", optional: true]}, {:gen_smtp, "~> 0.13 or ~> 1.0", [hex: :gen_smtp, repo: "hexpm", optional: true]}, {:hackney, "~> 1.9", [hex: :hackney, repo: "hexpm", optional: true]}, {:idna, "~> 6.0", [hex: :idna, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mail, "~> 0.2", [hex: :mail, repo: "hexpm", optional: true]}, {:mime, "~> 1.1 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mua, "~> 0.2.3", [hex: :mua, repo: "hexpm", optional: true]}, {:multipart, "~> 0.4", [hex: :multipart, repo: "hexpm", optional: true]}, {:plug, "~> 1.9", [hex: :plug, repo: "hexpm", optional: true]}, {:plug_cowboy, ">= 1.0.0", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:req, "~> 0.5.10 or ~> 0.6 or ~> 1.0", [hex: :req, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.2 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "6ddd84550800468d0e2c15a8aaff924a64c014ed6cff90318077efd1672b8b3b"},
   "tailwind": {:hex, :tailwind, "0.4.1", "e7bcc222fe96a1e55f948e76d13dd84a1a7653fb051d2a167135db3b4b08d3e9", [:mix], [], "hexpm", "6249d4f9819052911120dbdbe9e532e6bd64ea23476056adb7f730aa25c220d1"},
@@ -52,6 +59,8 @@
   "telemetry_poller": {:hex, :telemetry_poller, "1.3.0", "d5c46420126b5ac2d72bc6580fb4f537d35e851cc0f8dbd571acf6d6e10f5ec7", [:rebar3], [{:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "51f18bed7128544a50f75897db9974436ea9bfba560420b646af27a9a9b35211"},
   "thousand_island": {:hex, :thousand_island, "1.4.3", "2158209580f633be38d43ec4e3ce0a01079592b9657afff9080d5d8ca149a3af", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "6e4ce09b0fd761a58594d02814d40f77daff460c48a7354a15ab353bb998ea0b"},
   "tidewave": {:hex, :tidewave, "0.5.6", "91f35540b5599640443f1d3a1c6166bf506e202840261a6344e384e8813c1f64", [:mix], [{:circular_buffer, "~> 0.4 or ~> 1.0", [hex: :circular_buffer, repo: "hexpm", optional: false]}, {:igniter, "~> 0.6", [hex: :igniter, repo: "hexpm", optional: true]}, {:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:phoenix_live_reload, ">= 1.6.1", [hex: :phoenix_live_reload, repo: "hexpm", optional: true]}, {:plug, "~> 1.17", [hex: :plug, repo: "hexpm", optional: false]}, {:req, "~> 0.5", [hex: :req, repo: "hexpm", optional: false]}], "hexpm", "dc82d52b8b6ffc04680544b17cd340c7d4166bb0d63999eb960850526866b533"},
+  "timex": {:hex, :timex, "3.7.13", "0688ce11950f5b65e154e42b47bf67b15d3bc0e0c3def62199991b8a8079a1e2", [:mix], [{:combine, "~> 0.10", [hex: :combine, repo: "hexpm", optional: false]}, {:gettext, "~> 0.26", [hex: :gettext, repo: "hexpm", optional: false]}, {:tzdata, "~> 1.1", [hex: :tzdata, repo: "hexpm", optional: false]}], "hexpm", "09588e0522669328e973b8b4fd8741246321b3f0d32735b589f78b136e6d4c54"},
+  "tzdata": {:hex, :tzdata, "1.1.3", "b1cef7bb6de1de90d4ddc25d33892b32830f907e7fc2fccd1e7e22778ab7dfbc", [:mix], [{:hackney, "~> 1.17", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm", "d4ca85575a064d29d4e94253ee95912edfb165938743dbf002acdf0dcecb0c28"},
   "unicode_util_compat": {:hex, :unicode_util_compat, "0.7.1", "a48703a25c170eedadca83b11e88985af08d35f37c6f664d6dcfb106a97782fc", [:rebar3], [], "hexpm", "b3a917854ce3ae233619744ad1e0102e05673136776fb2fa76234f3e03b23642"},
   "websock": {:hex, :websock, "0.5.3", "2f69a6ebe810328555b6fe5c831a851f485e303a7c8ce6c5f675abeb20ebdadc", [:mix], [], "hexpm", "6105453d7fac22c712ad66fab1d45abdf049868f253cf719b625151460b8b453"},
   "websock_adapter": {:hex, :websock_adapter, "0.5.9", "43dc3ba6d89ef5dec5b1d0a39698436a1e856d000d84bf31a3149862b01a287f", [:mix], [{:bandit, ">= 0.6.0", [hex: :bandit, repo: "hexpm", optional: true]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 2.6", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "5534d5c9adad3c18a0f58a9371220d75a803bf0b9a3d87e6fe072faaeed76a08"},

test/microwaveprop/radio/csv_import_test.exs

@@ -186,6 +186,20 @@ defmodule Microwaveprop.Radio.CsvImportTest do
       assert [{3, _error_msgs}] = errors
     end
 
+    test "imports row with US date format" do
+      csv = @valid_header <> "\n" <> "W5XD,K5TR,EM12,EM00,10000,CW,6/15/2024 2:30 PM"
+
+      assert {:ok, %{imported: [contact], errors: []}} = CsvImport.import(csv, @submitter)
+      assert contact.qso_timestamp == ~U[2024-06-15 14:30:00Z]
+    end
+
+    test "imports row with space-separated datetime" do
+      csv = @valid_header <> "\n" <> "W5XD,K5TR,EM12,EM00,10000,CW,2024-06-15 14:30"
+
+      assert {:ok, %{imported: [contact], errors: []}} = CsvImport.import(csv, @submitter)
+      assert contact.qso_timestamp == ~U[2024-06-15 14:30:00Z]
+    end
+
     test "row numbers account for header and blank lines" do
       csv =
         Enum.join(
@@ -205,4 +219,83 @@ defmodule Microwaveprop.Radio.CsvImportTest do
       assert [{4, _error_msgs}] = errors
     end
   end
+
+  describe "normalize_timestamp/1" do
+    test "parses ISO 8601 with Z" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("2024-06-15T14:30:00Z")
+    end
+
+    test "parses ISO 8601 with offset" do
+      assert {:ok, _} = CsvImport.normalize_timestamp("2024-06-15T14:30:00+00:00")
+    end
+
+    test "parses ISO without timezone" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("2024-06-15T14:30:00")
+    end
+
+    test "parses space-separated datetime" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("2024-06-15 14:30:00")
+    end
+
+    test "parses space-separated without seconds" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("2024-06-15 14:30")
+    end
+
+    test "parses date only" do
+      assert {:ok, "2024-06-15T00:00:00Z"} = CsvImport.normalize_timestamp("2024-06-15")
+    end
+
+    test "parses US date with AM/PM" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("6/15/2024 2:30 PM")
+    end
+
+    test "parses US date with AM" do
+      assert {:ok, "2024-06-15T09:30:00Z"} = CsvImport.normalize_timestamp("6/15/2024 9:30 AM")
+    end
+
+    test "parses 12:00 AM as midnight" do
+      assert {:ok, "2024-06-15T00:00:00Z"} = CsvImport.normalize_timestamp("6/15/2024 12:00 AM")
+    end
+
+    test "parses 12:00 PM as noon" do
+      assert {:ok, "2024-06-15T12:00:00Z"} = CsvImport.normalize_timestamp("6/15/2024 12:00 PM")
+    end
+
+    test "parses zero-padded US date with AM/PM" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("06/15/2024 02:30 PM")
+    end
+
+    test "parses US date 24h" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("06/15/2024 14:30")
+    end
+
+    test "parses US date 24h unpadded" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("6/15/2024 14:30")
+    end
+
+    test "parses US date with dashes" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("06-15-2024 14:30")
+    end
+
+    test "parses compact with T" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("20240615T143000")
+    end
+
+    test "parses compact with space" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("20240615 1430")
+    end
+
+    test "trims whitespace" do
+      assert {:ok, "2024-06-15T14:30:00Z"} = CsvImport.normalize_timestamp("  2024-06-15T14:30:00Z  ")
+    end
+
+    test "returns error for garbage" do
+      assert {:error, "qso_timestamp could not be parsed: garbage"} =
+               CsvImport.normalize_timestamp("garbage")
+    end
+
+    test "returns error for empty string" do
+      assert {:error, _} = CsvImport.normalize_timestamp("")
+    end
+  end
 end