feat: add star stats and welcome message

src/lib/aoc.lua

@@ -0,0 +1,137 @@
+SRC_PATH = "/aoc/src"
+
+package.path = SRC_PATH .. "/lib/?.lua;" .. package.path
+
+START_DATE = {day=1, month=12, year=2025}
+END_DATE = {day=12, month=12, year=2025}
+
+local json = require("json")
+local today = os.date("*t")
+
+local function loadStats(path)
+    path = shell.resolve(path)
+    if not fs.exists(path) then
+        printError("Stats file not found (" .. path .. ")")
+        return
+    end
+    local file, err = fs.open(path, "r")
+    if not file then
+        printError("Cannot open stats file")
+        return
+    end
+    local data = json.loads(file.readAll())
+    file.close()
+    return data
+end
+
+---Checks whether date2 is after date1
+---@param date1 any
+---@param date2 any
+---@return boolean
+local function isAfter(date1, date2)
+    if date2.year < date1.year then
+        return false
+    elseif date2.year > date1.year then
+        return true
+    end
+    if date2.month < date1.month then
+        return false
+    elseif date2.month > date1.month then
+        return true
+    end
+    return date2.day > date1.day
+end
+
+---Checks whether date2 is before date1
+---@param date1 any
+---@param date2 any
+---@return boolean
+local function isBefore(date1, date2)
+    if date2.year > date1.year then
+        return false
+    elseif date2.year < date1.year then
+        return true
+    end
+    if date2.month > date1.month then
+        return false
+    elseif date2.month < date1.month then
+        return true
+    end
+    return date2.day < date1.day
+end
+
+local function isInDateRange(startDate, targetDate, endDate)
+    return not (isBefore(startDate, targetDate) or isAfter(endDate, targetDate))
+end
+
+local function printDateInfo()
+    if isBefore(START_DATE, today) then
+        print("AoC 2025 has not started yet")
+        return
+    end
+    if isAfter(END_DATE, today) then
+        print("AoC 2025 has ended")
+        return
+    end
+    local day = today.day
+    print("Day " .. day .. "/" .. END_DATE.day)
+end
+
+local function printStats()
+    local stats = loadStats("aoc/res/stats.json")
+    local keys = {}
+    for k in pairs(stats) do
+        table.insert(keys, k)
+    end
+    table.sort(keys)
+
+    local stars = 0
+
+    for _, key in ipairs(keys) do
+        local value = stats[key]
+        local day = tonumber(key:sub(4))
+        local date = {day=day, month=START_DATE.month, year=START_DATE.year}
+        if not isBefore(date, today) then
+            term.setTextColor(colors.white)
+        else
+            term.setTextColor(colors.gray)
+        end
+        write(string.format("Day %2s ", day))
+        if value.puzzle1 then
+            term.setTextColor(colors.orange)
+            stars = stars + 1
+        else
+            term.setTextColor(colors.gray)
+        end
+        write("\x04")
+        if value.puzzle2 then
+            term.setTextColor(colors.orange)
+            stars = stars + 1
+        else
+            term.setTextColor(colors.gray)
+        end
+        write("\x04")
+        term.setTextColor(colors.white)
+        print()
+    end
+
+    term.setTextColor(colors.white)
+    write(string.format("You have %d", stars))
+    term.setTextColor(colors.orange)
+    write("\x04")
+    term.setTextColor(colors.white)
+    print()
+end
+
+local function main()
+    term.setTextColor(colors.green)
+    textutils.slowPrint("+--------------------------------------+", 80)
+    textutils.slowPrint("|  Welcome to the Advent of Code 2025  |", 80)
+    textutils.slowPrint("+--------------------------------------+", 80)
+    term.setTextColor(colors.white)
+
+    printDateInfo()
+    printStats()
+end
+
+main()