FarmBot v1.0.0

--[[

FarmerBot v1.0.0

Guide
-----------------
Crops: Wheat
-----------------

Goals:
Farm down a line of crops and constantly check the crops.

]]--

-- Globals --
local CARROT = { id = 1, mature = 7, name = "minecraft:carrots", seed = "minecraft:carrot" }
local WHEAT = { id = 2, mature = 7, name = "minecraft:wheat", seed = "minecraft:wheat_seeds" }
local POTATO = { id = 3, mature = 7, name = "minecraft:potatoes", seed = "minecraft:potato" }

-- Helper Function: Determine if the crop is fully developed. If not, alert the user.
function isGrown(row, length, current, expected)
	rednet.send(11, "[FarmBot] Crop (" .. row .. ", " .. length .. ") status: " .. (current/expected) * 100 .. "%", "bttp")
	if current == expected then
		return true
	end
	return false
end

-- Helper Function: Determines if the crop ID has any seeds for said crop. Selects seed if true.
function hasSeeds(id)
	if id == CARROT.id then
		for i = 1, 16 do
			local data = turtle.getItemDetail(i)
			if data.name == CARROT.seed then
				turtle.select(i)
				return true
			end
		end
	elseif id == WHEAT.id then
		for i = 1, 16 do
			local data = turtle.getItemDetail(i)
			if data.name == WHEAT.seed then
				turtle.select(i)
				return true
			end
		end
	elseif id == POTATO.id then
		for i = 1, 16 do
			local data = turtle.getItemDetail(i)
			if data.name == POTATO.seed then
				turtle.select(i)
				return true
			end
		end
	else
		return false
	end

end

function dropItems()
	for i = 16,1,-1 do
		turtle.select(i)
		turtle.dropDown()
	end
end

-- Network Handling (modem on right)
if rednet.isOpen("right") then
	rednet.send(11, "[FarmBot] Connected to modem!", "bttp")
else
	rednet.open("right")
	rednet.send(11, "[FarmBot] Turning on modem...", "bttp")
	rednet.send(11, "[FarmBot] Connected successfully!", "bttp")
end


-- Player Input
local input = { rows = 0, length = 0 }

-- Ask player for input
term.write("Please enter number of rows: ")
input.rows = tonumber(read())
term.write("Please enter in length of row: ")
input.length = tonumber(read())

rednet.send(11, "[FarmBot] Farming " .. input.rows .. "x" .. input.length .. " sized farm.", "bttp")

-- Preface: Determine if the bot was placed on the ground. If so, go up one block.
if turtle.detectDown() then
	turtle.up()
	os.sleep(2)
	turtle.forward()
end

while true do

	-- Start farming the area.
	for i = 1, input.rows do

		for j = 1, input.length do
			-- Check status of current crop.
			if turtle.detectDown() then
				--There is something below. Determine if it is something we can handle.
				local success, data = turtle.inspectDown()
				if success then
					--Determine if names match to any crop
					if data.name == CARROT.name then
						--Determine if the crop is grown. If it is, remove it and replace it.
						if isGrown(i,j,data.metadata,CARROT.mature) then
							--Break the block... Then replace...
							turtle.digDown()
							turtle.suckDown() -- Pick up the local crop.
							if hasSeeds(CARROT.id) then
								turtle.placeDown()
							else
								rednet.send(11, "[FarmBot] Unable to find seed for CARROT (" .. i .. "," .. j .. ")", "bttp")
							end
						end
					elseif data.name == WHEAT.name then
						--Determine if the crop is grown. If it is, remove it and replace it.
						if isGrown(i,j,data.metadata,WHEAT.mature) then
							--Break the block... Then replace...
							turtle.digDown()
							turtle.suckDown() -- Pick up the local crop.
							if hasSeeds(WHEAT.id) then
								turtle.placeDown()
							else
								rednet.send(11, "[FarmBot] Unable to find seed for WHEAT (" .. i .. "," .. j .. ")", "bttp")
							end
						end
					elseif data.name == POTATO.name then
						--Determine if the crop is grown. If it is, remove it and replace it.
						if isGrown(i,j,data.metadata,POTATO.mature) then
							--Break the block... Then replace...
							turtle.digDown()
							turtle.suckDown() -- Pick up the local crop.
							if hasSeeds(POTATO.id) then
								turtle.placeDown()
							else
								rednet.send(11, "[FarmBot] Unable to find seed for POTATO (" .. i .. "," .. j .. ")", "bttp")
							end
						end
					else
						rednet.send(11, "[FarmBot] Unable to recognize crop (" .. data.name .. ")", "bttp")
					end
				else
					rednet.send(11, "[FarmBot] Cannot read block (" .. i .. "," .. j .. ")", "bttp")
				end
			else
				rednet.send(11, "[FarmBot] No block found (" .. i .. "," .. j .. ")", "bttp")
			end

			-- Go forward one to continue.
			turtle.forward()
		end
		os.sleep(3)
		-- Done reviewing the row. Now move to new row.
		local isEven = i % 2 == 0
		if isEven == false then
			turtle.turnLeft()
			turtle.forward()
			turtle.turnLeft()
		else
			turtle.turnRight()
			turtle.forward()
			turtle.turnRight()
		end
	end
	rednet.send(11, "[FarmBot] Resetting back to start.", "bttp")
	os.sleep(5)

	-- Go back to start where chest is.
	for k = 1, input.length do
		turtle.forward()
	end
	turtle.turnLeft()
	for l = 1, input.rows do
		turtle.forward()
	end
	turtle.turnLeft()

	-- Drop items in hopper below.
	turtle.down()
	os.sleep(2)
	dropItems()
	os.sleep(2)
	turtle.up()

	turtle.forward()
end