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local hudHandlers = {}
--- Adds a function as a HUD handler, it will be able to add items to the Areas HUD element.
function areas:registerHudHandler(handler)
table.insert(hudHandlers, handler)
end
function areas:getExternalHudEntries(pos)
local areas = {}
for _, func in pairs(hudHandlers) do
func(pos, areas)
end
return areas
end
--- Returns a list of areas that include the provided position.
function areas:getAreasAtPos(pos)
local res = {}
if self.store then
local a = self.store:get_areas_for_pos(pos, false, true)
for store_id, store_area in pairs(a) do
local id = tonumber(store_area.data)
res[id] = self.areas[id]
end
else
local px, py, pz = pos.x, pos.y, pos.z
for id, area in pairs(self.areas) do
local ap1, ap2 = area.pos1, area.pos2
if
(px >= ap1.x and px <= ap2.x) and
(py >= ap1.y and py <= ap2.y) and
(pz >= ap1.z and pz <= ap2.z) then
res[id] = area
end
end
end
return res
end
--- Returns areas that intersect with the passed area.
function areas:getAreasIntersectingArea(pos1, pos2)
local res = {}
if self.store then
local a = self.store:get_areas_in_area(pos1, pos2,
true, false, true)
for store_id, store_area in pairs(a) do
local id = tonumber(store_area.data)
res[id] = self.areas[id]
end
else
self:sortPos(pos1, pos2)
local p1x, p1y, p1z = pos1.x, pos1.y, pos1.z
local p2x, p2y, p2z = pos2.x, pos2.y, pos2.z
for id, area in pairs(self.areas) do
local ap1, ap2 = area.pos1, area.pos2
if
(ap1.x <= p2x and ap2.x >= p1x) and
(ap1.y <= p2y and ap2.y >= p1y) and
(ap1.z <= p2z and ap2.z >= p1z) then
-- Found an intersecting area.
res[id] = area
end
end
end
return res
end
-- Checks if the area is unprotected or owned by you
function areas:canInteract(pos, name)
if minetest.check_player_privs(name, self.adminPrivs) then
return true
end
local owned = false
for _, area in pairs(self:getAreasAtPos(pos)) do
if area.owner == name or area.open then
return true
else
owned = true
end
end
return not owned
end
-- Returns a table (list) of all players that own an area
function areas:getNodeOwners(pos)
local owners = {}
for _, area in pairs(self:getAreasAtPos(pos)) do
table.insert(owners, area.owner)
end
return owners
end
--- Checks if the area intersects with an area that the player can't interact in.
-- Note that this fails and returns false when the specified area is fully
-- owned by the player, but with multiple protection zones, none of which
-- cover the entire checked area.
-- @param name (optional) Player name. If not specified checks for any intersecting areas.
-- @param allow_open Whether open areas should be counted as if they didn't exist.
-- @return Boolean indicating whether the player can interact in that area.
-- @return Un-owned intersecting area ID, if found.
function areas:canInteractInArea(pos1, pos2, name, allow_open)
if name and minetest.check_player_privs(name, self.adminPrivs) then
return true
end
self:sortPos(pos1, pos2)
-- Intersecting non-owned area ID, if found.
local blocking_area = nil
local areas = self:getAreasIntersectingArea(pos1, pos2)
for id, area in pairs(areas) do
-- First check for a fully enclosing owned area.
-- A little optimization: isAreaOwner isn't necessary
-- here since we're iterating over all relevant areas.
if area.owner == name and
self:isSubarea(pos1, pos2, id) then
return true
end
-- Then check for intersecting non-owned (blocking) areas.
-- We don't bother with this check if we've already found a
-- blocking area, as the check is somewhat expensive.
-- The area blocks if the area is closed or open areas aren't
-- acceptable to the caller, and the area isn't owned.
-- Note: We can't return directly here, because there might be
-- an exclosing owned area that we haven't gotten to yet.
if not blocking_area and
(not allow_open or not area.open) and
(not name or not self:isAreaOwner(id, name)) then
blocking_area = id
end
end
if blocking_area then
return false, blocking_area
end
-- There are no intersecting areas or they are only partially
-- intersecting areas and they are all owned by the player.
return true
end
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