minetest.git - modified minetest for gpcfs purposes

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author	rubenwardy <rw@rubenwardy.com>	2021-07-27 18:08:49 +0100
committer	GitHub <noreply@github.com>	2021-07-27 19:08:49 +0200
commit	9c145ba0d8baeea57914c62fcc07c06bc6a0257a (patch)
tree	574532536eef3b74be947bc3627e688e8e2a9741 /src/gui
parent	bf3acbf388406f736286d990adb5f35a9023c390 (diff)
download	minetest-9c145ba0d8baeea57914c62fcc07c06bc6a0257a.tar.gz minetest-9c145ba0d8baeea57914c62fcc07c06bc6a0257a.tar.bz2 minetest-9c145ba0d8baeea57914c62fcc07c06bc6a0257a.zip

ContentDB: Add reason to downloads (#10876)

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-- Setting and clearing routes

-- TODO duplicate
local lntrans = { "A", "B" }
local function sigd_to_string(sigd)
	return minetest.pos_to_string(sigd.p).." / "..lntrans[sigd.s]
end

local ildb = advtrains.interlocking.db
local ilrs = {}

local sigd_equal = advtrains.interlocking.sigd_equal

-- table containing locked points
-- also manual locks (maintenance a.s.o.) are recorded here
-- [pts] = { 
--		[n] = { [by = <ts_id>], rsn = <human-readable text>, [origin = <sigd>] }
--	}
ilrs.rte_locks = {}
ilrs.rte_callbacks = {
	ts = {},
	lck = {}
}


-- main route setting. First checks if everything can be set as designated,
-- then (if "try" is not set) actually sets it
-- returns:
-- true - route can be/was successfully set
-- false, message, cbts, cblk - something went wrong, what is contained in the message.
-- cbts: the ts id of the conflicting ts, cblk: the pts of the conflicting component
function ilrs.set_route(signal, route, try)
	if not try then
		local tsuc, trsn, cbts, cblk = ilrs.set_route(signal, route, true)
		if not tsuc then
			return false, trsn, cbts, cblk
		end
	end

	
	-- we start at the tc designated by signal
	local c_sigd = signal
	local first = true
	local i = 1
	local rtename = route.name
	local signalname = ildb.get_tcbs(signal).signal_name
	local c_tcbs, c_ts_id, c_ts, c_rseg, c_lckp
	local signals = {}
	local nodst
	while c_sigd and i<=#route do
		c_tcbs = ildb.get_tcbs(c_sigd)
		if not c_tcbs then
			if not try then atwarn("Did not find TCBS",c_sigd,"while setting route",rtename,"of",signal) end
			return false, "No TCB found at "..sigd_to_string(c_sigd)..". Please reconfigure route!"
		end
		if i == 1 then
			nodst = c_tcbs.nodst
		end
		c_ts_id = c_tcbs.ts_id
		if not c_ts_id then
			if not try then atwarn("Encountered End-Of-Interlocking while setting route",rtename,"of",signal) end
			return false, "No track section adjacent to "..sigd_to_string(c_sigd)..". Please reconfigure route!"
		end
		c_ts = ildb.get_ts(c_ts_id)
		c_rseg = route[i]
		c_lckp = {}
		
		if c_ts.route then
			if not try then atwarn("Encountered ts lock during a real run of routesetting routine, at ts=",c_ts_id,"while setting route",rtename,"of",signal) end
			return false, "Section '"..c_ts.name.."' already has route set from "..sigd_to_string(c_ts.route.origin)..":\n"..c_ts.route.rsn, c_ts_id, nil
		end
		if c_ts.trains and #c_ts.trains>0 then
			if not try then atwarn("Encountered ts occupied during a real run of routesetting routine, at ts=",c_ts_id,"while setting route",rtename,"of",signal) end
			return false, "Section '"..c_ts.name.."' is occupied!", c_ts_id, nil
		end
		
		for pts, state in pairs(c_rseg.locks) do
			local confl = ilrs.has_route_lock(pts, state)
			
			local pos = minetest.string_to_pos(pts)
			if advtrains.is_passive(pos) then
				local cstate = advtrains.getstate(pos)


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