minetest-mm/mods/unified_inventory/category.lua

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local S = minetest.get_translator("unified_inventory")
unified_inventory.registered_categories = {}
unified_inventory.registered_category_items = {}
unified_inventory.category_list = {}
local function char_to_sort_index(char_code)
if char_code <= 32 then
-- Command codes, no thanks
return 0
end
if char_code <= 64 then
-- Sorts numbers, and some punctuation, after letters
return char_code
end
if char_code >= 158 then
-- Out of sortable range
return 0
end
if char_code > 122 then
-- Avoids overlap with {, |, } and ~
return char_code - 58
end
if char_code > 96 then
-- Normalises lowercase with uppercase
return char_code - 96
end
return char_code - 64
end
local function string_to_sort_index(str)
local max_chars = 5
local power = 100
local index = 0
for i=1,math.min(#str, max_chars) do
index = index + (char_to_sort_index(string.byte(str, i))/(power^i))
end
return index
end
function update_category_list()
local category_list = {}
table.insert(category_list, {
name = "all",
label = S("All Items"),
symbol = "ui_category_all.png",
index = -2,
})
table.insert(category_list, {
name = "uncategorized",
label = S("Misc. Items"),
symbol = "ui_category_none.png",
index = -1,
})
for category, def in pairs(unified_inventory.registered_categories) do
table.insert(category_list, {
name = category,
label = def.label or category,
symbol = def.symbol,
index = def.index or -- sortby defined order
string_to_sort_index(category) -- or do a rudimentary alphabetical sort
})
end
table.sort(category_list, function (a,b)
return a.index < b.index
end)
unified_inventory.category_list = category_list
end
local function ensure_category_exists(category_name)
if not unified_inventory.registered_categories[category_name] then
unified_inventory.registered_categories[category_name] = {
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symbol = "unknown_item.png",
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label = category_name
}
end
if not unified_inventory.registered_category_items[category_name] then
unified_inventory.registered_category_items[category_name] = {}
end
end
function unified_inventory.register_category(category_name, config)
ensure_category_exists(category_name)
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config = config or {}
if config.symbol then
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unified_inventory.set_category_symbol(category_name, config.symbol)
end
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if config.label then
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unified_inventory.set_category_label(category_name, config.label)
end
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if config.index then
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unified_inventory.set_category_index(category_name, config.index)
end
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if config.items then
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unified_inventory.add_category_items(category_name, config.items)
end
update_category_list()
end
function unified_inventory.set_category_symbol(category_name, symbol)
ensure_category_exists(category_name)
unified_inventory.registered_categories[category_name].symbol = symbol
update_category_list()
end
function unified_inventory.set_category_label(category_name, label)
ensure_category_exists(category_name)
unified_inventory.registered_categories[category_name].label = label
update_category_list()
end
function unified_inventory.set_category_index(category_name, index)
ensure_category_exists(category_name)
unified_inventory.registered_categories[category_name].index = index
update_category_list()
end
function unified_inventory.add_category_item(category_name, item)
ensure_category_exists(category_name)
unified_inventory.registered_category_items[category_name][item] = true
end
function unified_inventory.add_category_items(category_name, items)
for _,item in ipairs(items) do
unified_inventory.add_category_item(category_name, item)
end
end
function unified_inventory.remove_category_item(category_name, item)
unified_inventory.registered_category_items[category_name][item] = nil
end
function unified_inventory.remove_category(category_name)
unified_inventory.registered_categories[category_name] = nil
unified_inventory.registered_category_items[category_name] = nil
update_category_list()
end
function unified_inventory.find_category(item)
-- Returns the first category the item exists in
-- Best for checking if an item has any category at all
for category, items in pairs(unified_inventory.registered_category_items) do
if items[item] then return category end
end
end
function unified_inventory.find_categories(item)
-- Returns all the categories the item exists in
-- Best for listing all categories
local categories = {}
for category, items in pairs(unified_inventory.registered_category_items) do
if items[item] then
table.insert(categories, category)
end
end
return categories
end