91 lines
2.0 KiB
Lua
91 lines
2.0 KiB
Lua
local db = {}
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if not fs.exists("data.db") then
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local file = fs.open("data.db", "w")
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file.write("{}")
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fs.close()
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end
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local file = fs.open("data.db","r+")
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if not file then error("failed to open db file") end
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local function readTable()
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file.seek("set")
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return textutils.unserialise(file.readAll() or "{}") or {}
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end
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local function writeTable(t)
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file.seek("set")
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file.write(textutils.serialise(t))
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file.flush()
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end
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---returns a list of all materials
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---@return string[]
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function db.getMaterials()
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local table = readTable()
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local materials = {}
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for k,_ in pairs(table.materials or {}) do
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materials[#materials+1] = k
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end
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return materials
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end
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---gets the price of a material
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---@param mat string
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---@return number
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function db.getPrice(mat)
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return (readTable().materials or {})[mat]
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end
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---returns a list of all currencies
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---@return string[]
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function db.getCurrencies()
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local table = readTable()
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local currencies = {}
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for k,_ in pairs(table.currencies or {}) do
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currencies[#currencies+1] = k
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end
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return currencies
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end
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---gets the worth of a currency
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---@param cur string
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---@return number
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function db.getCurrencyWorth(cur)
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return (readTable().currencies or {})[cur]
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end
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---sets the price of a material
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---@param mat string
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---@param price number
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function db.setPrice(mat,price)
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local table = readTable()
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if not table.materials then table.materials = {} end
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table.materials[mat] = price
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writeTable(table)
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end
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---sets the worth of a currency
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---@param cur string
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---@param worth number
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function db.setWorth(cur,worth)
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local table = readTable()
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if not table.currencies then table.currencies = {} end
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table.currencies[cur] = worth
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writeTable(table)
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end
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---gets the currency unit string
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---@return string
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function db.getCurrencyUnit()
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return readTable().currency_unit or "cr"
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end
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---sets the currency unit string
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---@param unit string
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function db.setCurrencyUnit(unit)
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local table = readTable()
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table.currency_unit = unit
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writeTable(table)
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end
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return db |