Module:LatestUpdate

Overview

This module calculates the days since the last update stored in Data:LatestUpdate.json and sends to Module:UpdateExcerpt to be displayed by Template:Deadlock Wiki/UpdateExcerpt. It can also be called to calculate the time since any given date, in days.

Examples

days_since_date

This function can be called to calculate the days passed from a given date, using the format "Month/Day/Year". "Month" has to be in numbers.

For days since January 30 2026:

{{#invoke:LatestUpdate|days_since_date|1|30|2026}}

days_since

This is an automated function that calculates the days since the latest update stored in Data:LatestUpdate.json.

days_since_text

This is an automated function that wraps the "days_since" data in a localized text template to be used by Module:UpdateExcerpt.

---

local p = {}

local data = mw.loadJsonData("Data:LatestUpdate.json")
local update = data.latest_update or {}

local month_map = {
    January = 1,
    February = 2,
    March = 3,
    April = 4,
    May = 5,
    June = 6,
    July = 7,
    August = 8,
    September = 9,
    October = 10,
    November = 11,
    December = 12
}

-- Plural rules
local plural_rules = {

    -- English 
    en = function(n)
        return n == 1 and 1 or 2
    end,

    -- Spanish
    es = function(n)
        return n == 1 and 1 or 2
    end,

    -- French
    fr = function(n)
        return (n == 0 or n == 1) and 1 or 2
    end,

    -- Korean (no plural distinction)
    ko = function(n)
        return 1
    end,

    -- Russian
    ru = function(n)
        if n % 10 == 1 and n % 100 ~= 11 then
            return 1
        elseif n % 10 >= 2 and n % 10 <= 4 and (n % 100 < 10 or n % 100 >= 20) then
            return 2
        else
            return 3
        end
    end,

    -- Turkish
    tr = function(n)
        return 1
    end,

    -- Czech
    cs = function(n)
        if n == 1 then
            return 1
        elseif n >= 2 and n <= 4 then
            return 2
        else
            return 3
        end
    end,

    -- Chinese (simplified)
    ["zh-hans"] = function(n)
        return 1
    end,

    -- Chinese (traditional)
    ["zh-hant"] = function(n)
        return 1
    end,

    -- uncomment when needed
    -- pl = function(n)
    --     if n == 1 then return 1
    --     elseif n % 10 >= 2 and n % 10 <= 4 and (n % 100 < 10 or n % 100 >= 20) then return 2
    --     else return 3 end
    -- end,

    -- uk = function(n)
    --     if n % 10 == 1 and n % 100 ~= 11 then return 1
    --     elseif n % 10 >= 2 and n % 10 <= 4 and (n % 100 < 10 or n % 100 >= 20) then return 2
    --     else return 3 end
    -- end,

    -- de = function(n)
    --     return n == 1 and 1 or 2
    -- end,

    -- it = function(n)
    --     return n == 1 and 1 or 2
    -- end,

    -- pt = function(n)
    --     return n == 1 and 1 or 2
    -- end
}

local translations = {

    en = {
        [1] = "%d day ago",
        [2] = "%d days ago"
    },

    es = {
        [1] = "hace %d día",
        [2] = "hace %d días"
    },

    fr = {
        [1] = "il y a %d jour",
        [2] = "il y a %d jours"
    },

    ko = {
        [1] = "%d일 전"
    },

    ru = {
        [1] = "%d день назад",
        [2] = "%d дня назад",
        [3] = "%d дней назад"
    },

    tr = {
        [1] = "%d gün önce"
    },

    cs = {
        [1] = "před %d dnem",
        [2] = "před %d dny",
        [3] = "před %d dny"
    },

    ["zh-hans"] = {
        [1] = "%d天前"
    },

    ["zh-hant"] = {
        [1] = "%d天前"
    },

    -- uncomment when needed

    -- pl = {
    --     [1] = "%d dzień temu",
    --     [2] = "%d dni temu",
    --     [3] = "%d dni temu"
    -- },

    -- uk = {
    --     [1] = "%d день тому",
    --     [2] = "%d дні тому",
    --     [3] = "%d днів тому"
    -- },

    -- de = {
    --     [1] = "vor %d Tag",
    --     [2] = "vor %d Tagen"
    -- },

    -- it = {
    --     [1] = "%d giorno fa",
    --     [2] = "%d giorni fa"
    -- },

    -- pt = {
    --     [1] = "há %d dia",
    --     [2] = "há %d dias"
    -- }
}

function p.month()
    return update.month or ""
end

function p.day()
    return update.day or ""
end

function p.year()
    return update.year or ""
end

local function getMonthNumber(monthName)
    return month_map[monthName]
end

function p.days_since()
    local month_number = getMonthNumber(update.month)

    if not month_number or not update.day or not update.year then
        return 0
    end

    local update_time = os.time({
        year = tonumber(update.year),
        month = month_number,
        day = tonumber(update.day),
        hour = 0
    })

    local now = os.time()

    local diff_seconds = os.difftime(now, update_time)
    local days = math.floor(diff_seconds / 86400)

    if days < 0 then
        return 0
    end

    return days
end

local function normalize_lang(lang)
    if not lang or lang == "" then
        return "en"
    end

    return string.gsub(lang, "^/", "")
end

function p.days_since_text(frame)
    local args = frame.args or {}

    local lang = normalize_lang(args.lang or args[1] or "en")

    if not translations[lang] then
        lang = "en"
    end

    local days = p.days_since()

    local plural_rule = plural_rules[lang] or plural_rules.en
    local form_index = plural_rule(days)

    local template = translations[lang][form_index]

    return string.format(template, days)
end

return p