WoWInterface - Any possible ways to obtain all order hall missions for each classes?

I could easily get all those available, in progress and complete missions with built in WoW APIs, but there seems to be no way to obtain all those order hall missions for each classes (including those missions which are currently not available or in CD).

Are those data stored in server side database, only?

Thank you!

-- EDIT #1

Quote:

I could easily get all those available, in progress and complete missions with built in WoW APIs, but ...

I was wrong.

Collecting those (available, in progress and complete missions) data were also not straight forward(?), as it seems like there's a slight delay on getting all data on first login.

The following those not insert data into a missions table.

Lua Code:

local f = CreateFrame("Frame");
f:RegisterEvent("PLAYER_ENTERING_WORLD");
f:SetScript("OnEvent", function(self, event, ...)
    if event == "PLAYER_ENTERING_WORLD" then
        if not IsAddOnLoaded("Blizzard_GarrisonUI") then
            LoadAddOn("Blizzard_GarrisonUI");
        end
 
        local missions = {};
        missions.available = GetAvailableMissions(GetPrimaryGarrisonFollowerType(LE_GARRISON_TYPE_7_0));
        missions.inProgress = GetInProgressMissions(GetPrimaryGarrisonFollowerType(LE_GARRISON_TYPE_7_0));
        missions.complete = GetCompleteMissions(GetPrimaryGarrisonFollowerType(LE_GARRISON_TYPE_7_0));
 
        for state, missionList in pairs(missions) do
            for i = 1, #missionList do
                local mission = missionList[i];
 
                mission.info = {GetMissionInfo(mission.missionID)};
            end
        end
 
        _G["missions"] = missions;
 
        f:UnregisterEvent("PLAYER_ENTERING_WORLD");
    end
end);

Thus, I had to give it a x seconds of delay to give it a time to collect its data.

Lua Code:

local f = CreateFrame("Frame");
f:RegisterEvent("PLAYER_ENTERING_WORLD");
f:SetScript("OnEvent", function(self, event, ...)
    if event == "PLAYER_ENTERING_WORLD" then
        C_Timer.After(5, function()
            if not IsAddOnLoaded("Blizzard_GarrisonUI") then
                LoadAddOn("Blizzard_GarrisonUI");
            end
 
            local missions = {};
            missions.available = GetAvailableMissions(GetPrimaryGarrisonFollowerType(LE_GARRISON_TYPE_7_0));
            missions.inProgress = GetInProgressMissions(GetPrimaryGarrisonFollowerType(LE_GARRISON_TYPE_7_0));
            missions.complete = GetCompleteMissions(GetPrimaryGarrisonFollowerType(LE_GARRISON_TYPE_7_0));
 
            for state, missionList in pairs(missions) do
                for i = 1, #missionList do
                    local mission = missionList[i];
 
                    mission.info = {GetMissionInfo(mission.missionID)};
                end
            end
 
            _G["missions"] = missions;
 
            f:UnregisterEvent("PLAYER_ENTERING_WORLD");
        end);
    end
end);

It worked okay, but I don't get why it needs a such delay :confused:

Would that be because it's getting all missions data from server?