Progress API

-- Progression API
-- [By Reububble] --

function sum()
    wide,high=term.getSize()
    term.setTextColor(2^15)
    while true do
        type,b=os.pullEvent('progress')
        if b~=nil then
            if b<1 then break end
            term.setBackgroundColor(1)
            for y=high/2-1,high/2+1 do
                term.setCursorPos(2,y)
                term.write(string.rep(' ',wide-2))
            end
            term.setCursorPos((wide-#tostring(b))/2,high/2)
            term.write(b)
        end
    end
end

function bar()
    wide,high=term.getSize()
    a,b,t=0,0,os.time()*50
    pA = ""
    pB = 0
    pC = 0
    pD = ""
    term.setTextColor(2^15)
    while true do
        s1=os.time()*50
        a=b
        type,b=os.pullEvent("progress")
        if b>=1 then
            return
        end
        s2=os.time()*50
        if s2<t then
            t=t-600
        end
        term.setCursorPos(2,high/2-1)
        term.setBackgroundColor(1)
        term.write(string.rep(" ",wide-2))
        pA="Time Elapsed : "..tostring(math.floor(s2-t))
        term.setCursorPos((wide-#pA)/2,high/2-1)
        term.write(pA)
        term.setCursorPos(2,high/2+1)
        term.write(string.rep(" ",wide-2))
        if 2*s2-t-s1==0 then
            pD="Time remaining : 0"
        else
            pD="Time remaining : "..tostring(math.ceil((1-b)*(((s2-t)/b)*(s2-t)+(s2-s1)*((s2-s1)/(b-a)))/(2*s2-t-s1)))
        end
        term.setCursorPos((wide-#pD)/2,high/2+1)
        term.write(pD)
        term.setCursorPos(2,high/2)
        term.write(" ")
        term.setBackgroundColor(2^14)
        pC=math.floor(b*100).."%" --text
        pB=math.floor(b*(wide-4)) --amound of Red
        term.write(string.rep(" ",pB))
        if pB>0 then
            term.setCursorPos(3,high/2)
            term.write(string.sub(pC,1,pB))
        end
        term.setBackgroundColor(2^5)
        term.setCursorPos(pB+3,high/2)
        term.write(string.rep(" ",math.ceil((1-b)*(wide-4))))
        if pB<#pC then
            term.setCursorPos(pB+3,high/2)
            term.write(string.sub(pC,pB+1))
        end
        term.setBackgroundColor(1)
        term.setCursorPos(wide-1,high/2)
        term.write(" ")
    end
end