mapPins.lua

local startupFrame = CreateFrame("Frame")
startupFrame:RegisterEvent("PLAYER_ENTERING_WORLD")
startupFrame:SetScript("OnEvent", function()

  if not IsAddOnLoaded("Blizzard_EncounterJournal") then
    EncounterJournal_LoadUI()  
  end

  -- Open once to initialise.
  EncounterJournal_OpenJournal()
  
  -- If you just do EncounterJournal:Hide(), ESC to open the menu will not
  -- work right after login.
  EncounterJournalCloseButton:Click()
  
  -- Otherwise closing EncounterJournal with ESC may not work during combat.
  tinsert(UISpecialFrames, "EncounterJournal")
end)


hooksecurefunc(WorldMapFrame, "SetMapID", function(self, mapID)
    if WorldMapFrame.ScrollContainer.Child then
      local kids = { WorldMapFrame.ScrollContainer.Child:GetChildren() };
      for _, v in ipairs(kids) do
        if v.pinTemplate and (v.pinTemplate == "EncounterJournalPinTemplate" or v.pinTemplate == "DungeonEntrancePinTemplate") then
          local instanceID = v.instanceID or v.journalInstanceID
          local encounterID = v.encounterID
          local OriginalOnClick = v.OnClick
          v.OnClick = function(...)
            if InCombatLockdown() then
              EncounterJournal_DisplayInstance(instanceID)
              if encounterID then EncounterJournal_DisplayEncounter(encounterID) end
              WorldMapFrame:Hide()
              EncounterJournal:Show()
            else
              OriginalOnClick(...)
            end
          end
        end
      end
    end
  end)