updater

print("Updating the Dungeon core files!")
local all = {}
if fs.exists(":dungeon/hashes") then
    local open = fs.open(":dungeon/hashes", "r")
    all = open.readAll()
    open.close()
    all = textutils.unserialize(all)
end
if not fs.exists(":dungeon/dcore/apis/JSON.lua") then
    local x = http.get("https://raw.githubusercontent.com/wergat/DungeonMap/master/dcore/apis/JSON.lua").readAll()
    local open = fs.open(":dungeon/dcore/apis/JSON.lua", "w")
    open.write(x)
    open.close()
end
JSON = assert(loadfile ":dungeon/dcore/apis/JSON.lua")()
if not http then
    printError("No HTTP!")
    error()
end

local files_updated = 0
local function downloadFromDir(url)
    local x = http.get(url)
    if x then
        x = x.readAll()
    else
        local now = http.get("http://www.timeapi.org/utc/now").readAll()
        now = now:sub(15,16)
        now = tonumber(now)
        local minutes = 60 - now
        local pstr = "minutes"
        if minutes == 1 then
            pstr = "minute"
        end
        printError("Oops! It looks like you've installed the DungeonMap files too much recently. Try again in about " .. minutes .. " " .. pstr .. "!")
        error()
    end
    x = JSON:decode(x)
    for i = 1, #x do
        local f = x[i]
        local path = f["path"]
        if f["sha"] == all[path] then
            print("Found file that doesn't need to be updated.")
        elseif f["type"] == "dir" then
            print("Downloading directory " .. f["sha"])
            all[path] = f["sha"]
            downloadFromDir(f["url"])
        else
            print("Downloading file " .. f["sha"])
            local xt = http.get(f["download_url"]).readAll()
            local open = fs.open("dungeon/" .. path, "w")
            open.write(xt)
            open.close()
            all[path] = f["sha"]
            files_updated = files_updated + 1
        end
    end
end

downloadFromDir("https://api.github.com/repos/wergat/DungeonMap/contents/")
print("Finished updating! " .. files_updated .. " files have been updated.")
local open = fs.open(":dungeon/hashes", "w")
open.write(textutils.serialize(all))
open.close()