--sif-standard-installer
local url = "https://raw.github.com/Siftos/sif-standard/latest-release/"
--Vars
--Functions
local function save(content, filename)
    if fs.exists("sif-standard/"..filename) then
        fs.delete("sif-standard"..filename)
    end
    local file = fs.open("sif-standard/"..filename, "w")
    file.write(content)
    file.close()
end

local function download(file)
    
    save(http.get(url..file).readAll(), file)
end

--RUN
term.setTextColor(colors.blue)
print("Do you want to download sif-standard on this computer? [Y/N]")
local consent = false
while true do
    local event, key = os.pullEvent()
    if event == "key" then    
        if key == keys.y then
            consent = true
            break
        end
        if key == keys.n then
            consent = false
            break
        end
    end
end

if not consent then
    return
end

if not fs.isDir("/sif-standard") then
    fs.makeDir("/sif-standard")
end

download("json.lua")

os.loadAPI("sif-standard/json.lua")

local filenames = {}

print(" ")
print("Fetching information...")
local err, response_table = json.decode(http.get("https://api.github.com/repos/Siftos/sif-standard/git/trees/latest-release?recursive=1").readAll())

for i, v in ipairs(response_table["tree"]) do
    filenames[#filenames + 1] = v["path"]
end

local x, y = term.getCursorPos()
local percent = 0
term.setTextColor(colors.white)
term.write("Downloading... ["..percent.."%]")
for i = 1, #filenames do
    term.setCursorPos(x,y)
    download(filenames[i])
    percent = math.floor(i/#filenames * 100)
    term.setTextColor(colors.white)
    term.write("Downloading... ")
    term.setTextColor(colors.yellow)
    if percent == 100 then
        term.setTextColor(colors.lime)
    end
    term.write("["..percent.."%]")
end

term.setTextColor(colors.blue)
print(" ")
print("Do you want to turn on autoupdating? [Y/N]")

local consent = false
while true do
    local _, key = os.pullEvent("key")
    if key == keys.y then
        consent = true
        break
    end
    if key == keys.n then
        term.setTextColor(colors.white)
        print(" ")
        print(" ")
        print("Thank you for downloading sif-standard libraries! Enjoy :)")
        consent = false
        break
    end
end

if not consent then
    return
end

if fs.exists("/startup.lua") then fs.delete("/startup.lua") end

local file = fs.open("startup.lua", "w")
file.write("shell.run(\"sif-standard/updater.lua\")")
file.close()

term.setTextColor(colors.white)
print(" ")
print("Thank you for downloading sif-standard libraries! Enjoy :)")