fix: alcoolog: time fixes

2 files changed, 29 insertions, 3 deletions

diff --git a/lib/lsg_irc/alcolog_plugin.ex b/lib/lsg_irc/alcolog_plugin.ex
index 46c43f4..f61b237 100644
--- a/lib/lsg_irc/alcolog_plugin.ex
+++ b/lib/lsg_irc/alcolog_plugin.ex
@@ -492,9 +492,9 @@ defmodule LSG.IRC.AlcoologPlugin do
   @spec since() :: %{IRC.Account.id() => DateTime.t()}
   @doc "Returns the last time the user was at 0 g/l"
   def since() do
-    :ets.foldr(fn({{acct, timestamp}, _vol, current, _cl, _deg, _name, _comment, _m}, acc) ->
+    :ets.foldr(fn({{acct, timestamp_or_date}, _vol, current, _cl, _deg, _name, _comment, _m}, acc) ->
       if !Map.get(acc, acct) && current == 0 do
-        date = DateTime.from_unix!(timestamp, :millisecond)
+        date = Util.to_date_time(timestamp_or_date)
         Map.put(acc, acct, date)
       else
         acc
@@ -1198,11 +1198,12 @@ defmodule LSG.IRC.AlcoologPlugin do
       date = DateTime.from_unix!(date, :millisecond)
       |> Timex.Timezone.convert("Europe/Paris")
     else
-      date
+      Util.to_naive_date_time(date)
     end
     now = DateTime.utc_now()
     |> Timex.Timezone.convert("Europe/Paris")
     {:ok, detail} = Timex.Format.DateTime.Formatters.Default.lformat(date, "({h24}:{m})", "fr")
+
     mins_since = round(DateTime.diff(now, date)/60.0)
     if ago = format_minute_duration(mins_since) do
       word = if mins_since > 0 do
diff --git a/lib/util.ex b/lib/util.ex
index d35157b..ce46174 100644
--- a/lib/util.ex
+++ b/lib/util.ex
@@ -1,5 +1,30 @@
 defmodule Util do
 
+  def to_naive_date_time(naive = %NaiveDateTime{}), do: naive
+  def to_naive_date_time(datetime = %DateTime{}), do: DateTime.to_naive(datetime)
+  def to_naive_date_time(timestamp) when is_integer(timestamp) do
+    timestamp
+    |> to_date_time()
+    |> to_naive_date_time()
+  end
+
+  def to_date_time(naive_or_timestamp, timezone \\ "Europe/Paris")
+
+  def to_date_time(date = %DateTime{}, timezone) do
+    DateTime.shift_zone!(data, timezone, Tzdata.TimeZoneDatabase)
+  end
+
+  def to_date_time(naive = %NaiveDateTime{}, timezone) do
+    DateTime.from_naive!(naive, timezone, Tzdata.TimeZoneDatabase)
+  end
+
+  # todo: this is wrong.
+  def to_date_time(timestamp, timezone) when is_integer(timestamp) do
+    timestamp
+    |> DateTime.from_unix!(:millisecond)
+    |> DateTime.shift_zone!(timezone, Tzdata.TimeZoneDatabase)
+  end
+
   def plusminus(number) when number > 0, do: "+#{number}"
   def plusminus(0), do: "0"
   def plusminus(number) when number < 0, do: "#{number}"