fix: parse dates without timezone offset (#404)

lua/gitlab/actions/summary.lua

@@ -93,7 +93,7 @@ M.build_info_lines = function()
   local options = {
     author = { title = "Author", content = "@" .. info.author.username .. " (" .. info.author.name .. ")" },
     created_at = { title = "Created", content = u.format_to_local(info.created_at, vim.fn.strftime("%z")) },
-    updated_at = { title = "Updated", content = u.format_to_local(info.updated_at, vim.fn.strftime("%z")) },
+    updated_at = { title = "Updated", content = u.time_since(info.updated_at) },
     detailed_merge_status = { title = "Status", content = info.detailed_merge_status },
     draft = { title = "Draft", content = (info.draft and "Yes" or "No") },
     conflicts = { title = "Merge Conflicts", content = (info.has_conflicts and "Yes" or "No") },

lua/gitlab/utils/init.lua

@@ -254,6 +254,20 @@ M.format_to_local = function(date_string, offset)
     local tzOffsetSign, tzOffsetHour, tzOffsetMin
     year, month, day, hour, min, sec, _, tzOffsetSign, tzOffsetHour, tzOffsetMin =
       date_string:match("(%d+)-(%d+)-(%d+)T(%d+):(%d+):(%d+).(%d+)([%+%-])(%d%d):(%d%d)")
+
+    -- ISO 8601 format with just "Z" (aka no time offset)
+    -- 2021-01-01T00:00:00Z
+    if year == nil then
+      year, month, day, hour, min, sec = date_string:match("(%d+)-(%d+)-(%d+)T(%d+):(%d+):(%d+)Z")
+      tzOffsetSign = "-"
+      tzOffsetHour = "00"
+      tzOffsetMin = "00"
+    end
+
+    if year == nil then
+      return "Date Unparseable"
+    end
+
     tzOffset = tzOffsetSign .. tzOffsetHour .. tzOffsetMin
   end
 

tests/spec/util_spec.lua

@@ -77,6 +77,13 @@ describe("utils/init.lua", function()
       local want = "November 19, 2011"
       assert.are.same(want, got)
     end)
+
+    it("Parses TZ w/out offset (relative)", function()
+      local stamp = "2023-11-14T18:44:02Z"
+      local got = u.time_since(stamp, current_date)
+      local want = "5 days ago"
+      assert.are.same(want, got)
+    end)
   end)
 
   describe("remove_first_value", function()
@@ -209,6 +216,7 @@ describe("utils/init.lua", function()
       { "2016-11-21T20:25:09.482-05:00", "-0500", "11/21/2016 at 20:25" },
       { "2016-11-22T1:25:09.482-00:00", "-0000", "11/22/2016 at 01:25" },
       { "2017-3-22T20:25:09.482+07:00", "+0700", "03/22/2017 at 20:25" },
+      { "2016-11-22T1:25:09Z", "-0000", "11/22/2016 at 01:25" },
     }
     for _, val in ipairs(tests) do
       local got = u.format_to_local(val[1], val[2])