bank_accounts/interest.lua
2025-08-22 02:10:35 +02:00

105 lines
4.3 KiB
Lua

-- interest.lua (Deadlock problem fixed)
local BALANCE_INTEREST_RATE = tonumber(minetest.settings:get("bank_accounts.interest_rate_balance")) or 0.005
local CREDIT_INTEREST_RATE = tonumber(minetest.settings:get("bank_accounts.interest_rate_credit")) or 0.03
local INTEREST_CHECK_INTERVAL = tonumber(minetest.settings:get("bank_accounts.interest_check_interval")) or 600
local ONE_DAY_IN_SECONDS = 86400
local timestamp_file_path = minetest.get_worldpath() .. "/bank_interest_timestamp.txt"
local function read_timestamp()
local f = io.open(timestamp_file_path, "r")
if not f then return 0 end
local time = tonumber(f:read("*a"))
f:close()
return time or 0
end
local function write_timestamp(time)
local f = io.open(timestamp_file_path, "w")
if not f then return end
f:write(tostring(time))
f:close()
end
local time_since_last_check = 0
bank_accounts.is_calculating_interest = false
minetest.register_globalstep(function(dtime)
if not minetest.settings:get_bool("bank_accounts.interest_enabled", true) then
return
end
time_since_last_check = time_since_last_check + dtime
if time_since_last_check < INTEREST_CHECK_INTERVAL then
return
end
time_since_last_check = 0
local last_timestamp = read_timestamp()
if os.time() - last_timestamp >= ONE_DAY_IN_SECONDS then
if bank_accounts.is_calculating_interest then
return
end
minetest.log("action", "[bank_accounts] Starting daily interest calculation...")
bank_accounts.is_calculating_interest = true
local data = bank_accounts.get_all_data()
local changes_made = false
-- Calculate interest on positive balances
if BALANCE_INTEREST_RATE > 0 then
for player_name, balance in pairs(data.balance) do
if balance > 0 then
local interest = balance * BALANCE_INTEREST_RATE
data.balance[player_name] = balance + interest
if not data.history then data.history = {} end
if not data.history[player_name] then data.history[player_name] = {} end
table.insert(data.history[player_name], 1, {
timestamp = os.time(), type = "Interest Paid", account = "balance",
amount = interest, new_total = data.balance[player_name],
purpose = S("Daily interest (@1%)", BALANCE_INTEREST_RATE * 100), other = "Bank"
})
changes_made = true
end
end
end
-- Calculate interest on credit debt
if CREDIT_INTEREST_RATE > 0 then
for player_name, credit in pairs(data.credit) do
if credit > 0 then
local interest = credit * CREDIT_INTEREST_RATE
data.credit[player_name] = credit + interest
if not data.history then data.history = {} end
if not data.history[player_name] then data.history[player_name] = {} end
table.insert(data.history[player_name], 1, {
timestamp = os.time(), type = "Interest Charged", account = "credit",
amount = interest, new_total = data.credit[player_name],
purpose = S("Daily interest (@1%)", CREDIT_INTEREST_RATE * 100), other = "Bank"
})
changes_made = true
end
end
end
if changes_made then
-- CORRECTED: Now calls the API function that bypasses the lock
local success = bank_accounts.save_all(data)
if success then
minetest.log("action", "[bank_accounts] Daily interest calculation complete and saved.")
-- CORRECTED: Timestamp is only updated after a successful save.
write_timestamp(os.time())
else
minetest.log("error", "[bank_accounts] Saving interest data FAILED. Will retry later.")
end
else
-- If no changes were made, still update the timestamp to prevent re-running immediately.
write_timestamp(os.time())
end
bank_accounts.is_calculating_interest = false
end
end)