--general collision detection algorithm where x is posX, y is posY, sx is size x, sy is size y
function isColliding(body1, body2)
    return (
        body1.x + body1.sx > body2.x and
        body1.y + body1.sy > body2.y and
        body2.x + body2.sx > body1.x and
        body2.y + body2.sy > body1.y
    )
end

--example:  if isColliding(player, enemy) then ( ... ) end

--general algorithm to get colliding sides
function edges(body1, body2)
    local tolerance = 5 --define a tolerance: if the bodies are colliding and side x is within tolerance pixels of side y...
    --return a tuple of booleans: left side, right side, top side, bottom side
    return
        body1.x + body1.sx - body2.x <= tolerance,
        body2.x + body2.sx - body1.x <= tolerance,
        body1.y + body1.sy - body2.y <= tolerance,
        body2.y + body2.sy - body1.y <= tolerance
end



--now these put together in an example:

function love:update(dt)
    if isColliding(player, enemy) then --NOTE: you SHOULD make isColliding a method of player so u can do if player:isColliding(enemy), but it's not needed
        local left, right, top, bottom = edges(player, enemy)
        --left = true if the right side of player is touching left side of enemy, same for the rest
        print(left, right, top, bottom)
    end
end