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AceDB-3.0.lua
740 lines (638 loc) · 24.4 KB
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AceDB-3.0.lua
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--- **AceDB-3.0** manages the SavedVariables of your addon.
-- It offers profile management, smart defaults and namespaces for modules.\\
-- Data can be saved in different data-types, depending on its intended usage.
-- The most common data-type is the `profile` type, which allows the user to choose
-- the active profile, and manage the profiles of all of his characters.\\
-- The following data types are available:
-- * **char** Character-specific data. Every character has its own database.
-- * **realm** Realm-specific data. All of the players characters on the same realm share this database.
-- * **class** Class-specific data. All of the players characters of the same class share this database.
-- * **race** Race-specific data. All of the players characters of the same race share this database.
-- * **faction** Faction-specific data. All of the players characters of the same faction share this database.
-- * **factionrealm** Faction and realm specific data. All of the players characters on the same realm and of the same faction share this database.
-- * **locale** Locale specific data, based on the locale of the players game client.
-- * **global** Global Data. All characters on the same account share this database.
-- * **profile** Profile-specific data. All characters using the same profile share this database. The user can control which profile should be used.
--
-- Creating a new Database using the `:New` function will return a new DBObject. A database will inherit all functions
-- of the DBObjectLib listed here. \\
-- If you create a new namespaced child-database (`:RegisterNamespace`), you'll get a DBObject as well, but note
-- that the child-databases cannot individually change their profile, and are linked to their parents profile - and because of that,
-- the profile related APIs are not available. Only `:RegisterDefaults` and `:ResetProfile` are available on child-databases.
--
-- For more details on how to use AceDB-3.0, see the [[AceDB-3.0 Tutorial]].
--
-- You may also be interested in [[libdualspec-1-0|LibDualSpec-1.0]] to do profile switching automatically when switching specs.
--
-- @usage
-- MyAddon = LibStub("AceAddon-3.0"):NewAddon("DBExample")
--
-- -- declare defaults to be used in the DB
-- local defaults = {
-- profile = {
-- setting = true,
-- }
-- }
--
-- function MyAddon:OnInitialize()
-- -- Assuming the .toc says ## SavedVariables: MyAddonDB
-- self.db = LibStub("AceDB-3.0"):New("MyAddonDB", defaults, true)
-- end
-- @class file
-- @name AceDB-3.0.lua
-- @release $Id$
local ACEDB_MAJOR, ACEDB_MINOR = "AceDB-3.0", 29
local AceDB = LibStub:NewLibrary(ACEDB_MAJOR, ACEDB_MINOR)
if not AceDB then return end -- No upgrade needed
-- Lua APIs
local type, pairs, next, error = type, pairs, next, error
local setmetatable, rawset, rawget = setmetatable, rawset, rawget
-- WoW APIs
local _G = _G
AceDB.db_registry = AceDB.db_registry or {}
AceDB.frame = AceDB.frame or CreateFrame("Frame")
local CallbackHandler
local CallbackDummy = { Fire = function() end }
local DBObjectLib = {}
--[[-------------------------------------------------------------------------
AceDB Utility Functions
---------------------------------------------------------------------------]]
-- Simple shallow copy for copying defaults
local function copyTable(src, dest)
if type(dest) ~= "table" then dest = {} end
if type(src) == "table" then
for k,v in pairs(src) do
if type(v) == "table" then
-- try to index the key first so that the metatable creates the defaults, if set, and use that table
v = copyTable(v, dest[k])
end
dest[k] = v
end
end
return dest
end
-- Called to add defaults to a section of the database
--
-- When a ["*"] default section is indexed with a new key, a table is returned
-- and set in the host table. These tables must be cleaned up by removeDefaults
-- in order to ensure we don't write empty default tables.
local function copyDefaults(dest, src)
-- this happens if some value in the SV overwrites our default value with a non-table
--if type(dest) ~= "table" then return end
for k, v in pairs(src) do
if k == "*" or k == "**" then
if type(v) == "table" then
-- This is a metatable used for table defaults
local mt = {
-- This handles the lookup and creation of new subtables
__index = function(t,k2)
if k2 == nil then return nil end
local tbl = {}
copyDefaults(tbl, v)
rawset(t, k2, tbl)
return tbl
end,
}
setmetatable(dest, mt)
-- handle already existing tables in the SV
for dk, dv in pairs(dest) do
if not rawget(src, dk) and type(dv) == "table" then
copyDefaults(dv, v)
end
end
else
-- Values are not tables, so this is just a simple return
local mt = {__index = function(t,k2) return k2~=nil and v or nil end}
setmetatable(dest, mt)
end
elseif type(v) == "table" then
if not rawget(dest, k) then rawset(dest, k, {}) end
if type(dest[k]) == "table" then
copyDefaults(dest[k], v)
if src['**'] then
copyDefaults(dest[k], src['**'])
end
end
else
if rawget(dest, k) == nil then
rawset(dest, k, v)
end
end
end
end
-- Called to remove all defaults in the default table from the database
local function removeDefaults(db, defaults, blocker)
-- remove all metatables from the db, so we don't accidentally create new sub-tables through them
setmetatable(db, nil)
-- loop through the defaults and remove their content
for k,v in pairs(defaults) do
if k == "*" or k == "**" then
if type(v) == "table" then
-- Loop through all the actual k,v pairs and remove
for key, value in pairs(db) do
if type(value) == "table" then
-- if the key was not explicitly specified in the defaults table, just strip everything from * and ** tables
if defaults[key] == nil and (not blocker or blocker[key] == nil) then
removeDefaults(value, v)
-- if the table is empty afterwards, remove it
if next(value) == nil then
db[key] = nil
end
-- if it was specified, only strip ** content, but block values which were set in the key table
elseif k == "**" then
removeDefaults(value, v, defaults[key])
end
end
end
elseif k == "*" then
-- check for non-table default
for key, value in pairs(db) do
if defaults[key] == nil and v == value then
db[key] = nil
end
end
end
elseif type(v) == "table" and type(db[k]) == "table" then
-- if a blocker was set, dive into it, to allow multi-level defaults
removeDefaults(db[k], v, blocker and blocker[k])
if next(db[k]) == nil then
db[k] = nil
end
else
-- check if the current value matches the default, and that its not blocked by another defaults table
if db[k] == defaults[k] and (not blocker or blocker[k] == nil) then
db[k] = nil
end
end
end
end
-- This is called when a table section is first accessed, to set up the defaults
local function initSection(db, section, svstore, key, defaults)
local sv = rawget(db, "sv")
local tableCreated
if not sv[svstore] then sv[svstore] = {} end
if not sv[svstore][key] then
sv[svstore][key] = {}
tableCreated = true
end
local tbl = sv[svstore][key]
if defaults then
copyDefaults(tbl, defaults)
end
rawset(db, section, tbl)
return tableCreated, tbl
end
-- Metatable to handle the dynamic creation of sections and copying of sections.
local dbmt = {
__index = function(t, section)
local keys = rawget(t, "keys")
local key = keys[section]
if key then
local defaultTbl = rawget(t, "defaults")
local defaults = defaultTbl and defaultTbl[section]
if section == "profile" then
local new = initSection(t, section, "profiles", key, defaults)
if new then
-- Callback: OnNewProfile, database, newProfileKey
t.callbacks:Fire("OnNewProfile", t, key)
end
elseif section == "profiles" then
local sv = rawget(t, "sv")
if not sv.profiles then sv.profiles = {} end
rawset(t, "profiles", sv.profiles)
elseif section == "global" then
local sv = rawget(t, "sv")
if not sv.global then sv.global = {} end
if defaults then
copyDefaults(sv.global, defaults)
end
rawset(t, section, sv.global)
else
initSection(t, section, section, key, defaults)
end
end
return rawget(t, section)
end
}
local function validateDefaults(defaults, keyTbl, offset)
if not defaults then return end
offset = offset or 0
for k in pairs(defaults) do
if not keyTbl[k] or k == "profiles" then
error(("Usage: AceDBObject:RegisterDefaults(defaults): '%s' is not a valid datatype."):format(k), 3 + offset)
end
end
end
local preserve_keys = {
["callbacks"] = true,
["RegisterCallback"] = true,
["UnregisterCallback"] = true,
["UnregisterAllCallbacks"] = true,
["children"] = true,
}
local realmKey = GetRealmName()
local charKey = UnitName("player") .. " - " .. realmKey
local _, classKey = UnitClass("player")
local _, raceKey = UnitRace("player")
local factionKey = UnitFactionGroup("player")
local factionrealmKey = factionKey .. " - " .. realmKey
local localeKey = GetLocale():lower()
local regionTable = { "US", "KR", "EU", "TW", "CN" }
local regionKey = regionTable[GetCurrentRegion()] or GetCurrentRegionName() or "TR"
local factionrealmregionKey = factionrealmKey .. " - " .. regionKey
-- Actual database initialization function
local function initdb(sv, defaults, defaultProfile, olddb, parent)
-- Generate the database keys for each section
-- map "true" to our "Default" profile
if defaultProfile == true then defaultProfile = "Default" end
local profileKey
if not parent then
-- Make a container for profile keys
if not sv.profileKeys then sv.profileKeys = {} end
-- Try to get the profile selected from the char db
profileKey = sv.profileKeys[charKey] or defaultProfile or charKey
-- save the selected profile for later
sv.profileKeys[charKey] = profileKey
else
-- Use the profile of the parents DB
profileKey = parent.keys.profile or defaultProfile or charKey
-- clear the profileKeys in the DB, namespaces don't need to store them
sv.profileKeys = nil
end
-- This table contains keys that enable the dynamic creation
-- of each section of the table. The 'global' and 'profiles'
-- have a key of true, since they are handled in a special case
local keyTbl= {
["char"] = charKey,
["realm"] = realmKey,
["class"] = classKey,
["race"] = raceKey,
["faction"] = factionKey,
["factionrealm"] = factionrealmKey,
["factionrealmregion"] = factionrealmregionKey,
["profile"] = profileKey,
["locale"] = localeKey,
["global"] = true,
["profiles"] = true,
}
validateDefaults(defaults, keyTbl, 1)
-- This allows us to use this function to reset an entire database
-- Clear out the old database
if olddb then
for k,v in pairs(olddb) do if not preserve_keys[k] then olddb[k] = nil end end
end
-- Give this database the metatable so it initializes dynamically
local db = setmetatable(olddb or {}, dbmt)
if not rawget(db, "callbacks") then
-- try to load CallbackHandler-1.0 if it loaded after our library
if not CallbackHandler then CallbackHandler = LibStub:GetLibrary("CallbackHandler-1.0", true) end
db.callbacks = CallbackHandler and CallbackHandler:New(db) or CallbackDummy
end
-- Copy methods locally into the database object, to avoid hitting
-- the metatable when calling methods
if not parent then
for name, func in pairs(DBObjectLib) do
db[name] = func
end
else
-- hack this one in
db.RegisterDefaults = DBObjectLib.RegisterDefaults
db.ResetProfile = DBObjectLib.ResetProfile
end
-- Set some properties in the database object
db.profiles = sv.profiles
db.keys = keyTbl
db.sv = sv
--db.sv_name = name
db.defaults = defaults
db.parent = parent
-- store the DB in the registry
AceDB.db_registry[db] = true
return db
end
-- handle PLAYER_LOGOUT
-- strip all defaults from all databases
-- and cleans up empty sections
local function logoutHandler(frame, event)
if event == "PLAYER_LOGOUT" then
for db in pairs(AceDB.db_registry) do
db.callbacks:Fire("OnDatabaseShutdown", db)
db:RegisterDefaults(nil)
-- cleanup sections that are empty without defaults
local sv = rawget(db, "sv")
for section in pairs(db.keys) do
if rawget(sv, section) then
-- global is special, all other sections have sub-entrys
-- also don't delete empty profiles on main dbs, only on namespaces
if section ~= "global" and (section ~= "profiles" or rawget(db, "parent")) then
for key in pairs(sv[section]) do
if not next(sv[section][key]) then
sv[section][key] = nil
end
end
end
if not next(sv[section]) then
sv[section] = nil
end
end
end
end
end
end
AceDB.frame:RegisterEvent("PLAYER_LOGOUT")
AceDB.frame:SetScript("OnEvent", logoutHandler)
--[[-------------------------------------------------------------------------
AceDB Object Method Definitions
---------------------------------------------------------------------------]]
--- Sets the defaults table for the given database object by clearing any
-- that are currently set, and then setting the new defaults.
-- @param defaults A table of defaults for this database
function DBObjectLib:RegisterDefaults(defaults)
if defaults and type(defaults) ~= "table" then
error(("Usage: AceDBObject:RegisterDefaults(defaults): 'defaults' - table or nil expected, got %q."):format(type(defaults)), 2)
end
validateDefaults(defaults, self.keys)
-- Remove any currently set defaults
if self.defaults then
for section,key in pairs(self.keys) do
if self.defaults[section] and rawget(self, section) then
removeDefaults(self[section], self.defaults[section])
end
end
end
-- Set the DBObject.defaults table
self.defaults = defaults
-- Copy in any defaults, only touching those sections already created
if defaults then
for section,key in pairs(self.keys) do
if defaults[section] and rawget(self, section) then
copyDefaults(self[section], defaults[section])
end
end
end
end
--- Changes the profile of the database and all of it's namespaces to the
-- supplied named profile
-- @param name The name of the profile to set as the current profile
function DBObjectLib:SetProfile(name)
if type(name) ~= "string" then
error(("Usage: AceDBObject:SetProfile(name): 'name' - string expected, got %q."):format(type(name)), 2)
end
-- changing to the same profile, dont do anything
if name == self.keys.profile then return end
local oldProfile = self.profile
local defaults = self.defaults and self.defaults.profile
-- Callback: OnProfileShutdown, database
self.callbacks:Fire("OnProfileShutdown", self)
if oldProfile and defaults then
-- Remove the defaults from the old profile
removeDefaults(oldProfile, defaults)
end
self.profile = nil
self.keys["profile"] = name
-- if the storage exists, save the new profile
-- this won't exist on namespaces.
if self.sv.profileKeys then
self.sv.profileKeys[charKey] = name
end
-- populate to child namespaces
if self.children then
for _, db in pairs(self.children) do
DBObjectLib.SetProfile(db, name)
end
end
-- Callback: OnProfileChanged, database, newProfileKey
self.callbacks:Fire("OnProfileChanged", self, name)
end
--- Returns a table with the names of the existing profiles in the database.
-- You can optionally supply a table to re-use for this purpose.
-- @param tbl A table to store the profile names in (optional)
function DBObjectLib:GetProfiles(tbl)
if tbl and type(tbl) ~= "table" then
error(("Usage: AceDBObject:GetProfiles(tbl): 'tbl' - table or nil expected, got %q."):format(type(tbl)), 2)
end
-- Clear the container table
if tbl then
for k,v in pairs(tbl) do tbl[k] = nil end
else
tbl = {}
end
local curProfile = self.keys.profile
local i = 0
for profileKey in pairs(self.profiles) do
i = i + 1
tbl[i] = profileKey
if curProfile and profileKey == curProfile then curProfile = nil end
end
-- Add the current profile, if it hasn't been created yet
if curProfile then
i = i + 1
tbl[i] = curProfile
end
return tbl, i
end
--- Returns the current profile name used by the database
function DBObjectLib:GetCurrentProfile()
return self.keys.profile
end
--- Deletes a named profile. This profile must not be the active profile.
-- @param name The name of the profile to be deleted
-- @param silent If true, do not raise an error when the profile does not exist
function DBObjectLib:DeleteProfile(name, silent)
if type(name) ~= "string" then
error(("Usage: AceDBObject:DeleteProfile(name): 'name' - string expected, got %q."):format(type(name)), 2)
end
if self.keys.profile == name then
error(("Cannot delete the active profile (%q) in an AceDBObject."):format(name), 2)
end
if not rawget(self.profiles, name) and not silent then
error(("Cannot delete profile %q as it does not exist."):format(name), 2)
end
self.profiles[name] = nil
-- populate to child namespaces
if self.children then
for _, db in pairs(self.children) do
DBObjectLib.DeleteProfile(db, name, true)
end
end
-- switch all characters that use this profile back to the default
if self.sv.profileKeys then
for key, profile in pairs(self.sv.profileKeys) do
if profile == name then
self.sv.profileKeys[key] = nil
end
end
end
-- Callback: OnProfileDeleted, database, profileKey
self.callbacks:Fire("OnProfileDeleted", self, name)
end
--- Copies a named profile into the current profile, overwriting any conflicting
-- settings.
-- @param name The name of the profile to be copied into the current profile
-- @param silent If true, do not raise an error when the profile does not exist
function DBObjectLib:CopyProfile(name, silent)
if type(name) ~= "string" then
error(("Usage: AceDBObject:CopyProfile(name): 'name' - string expected, got %q."):format(type(name)), 2)
end
if name == self.keys.profile then
error(("Cannot have the same source and destination profiles (%q)."):format(name), 2)
end
if not rawget(self.profiles, name) and not silent then
error(("Cannot copy profile %q as it does not exist."):format(name), 2)
end
-- Reset the profile before copying
DBObjectLib.ResetProfile(self, nil, true)
local profile = self.profile
local source = self.profiles[name]
copyTable(source, profile)
-- populate to child namespaces
if self.children then
for _, db in pairs(self.children) do
DBObjectLib.CopyProfile(db, name, true)
end
end
-- Callback: OnProfileCopied, database, sourceProfileKey
self.callbacks:Fire("OnProfileCopied", self, name)
end
--- Resets the current profile to the default values (if specified).
-- @param noChildren if set to true, the reset will not be populated to the child namespaces of this DB object
-- @param noCallbacks if set to true, won't fire the OnProfileReset callback
function DBObjectLib:ResetProfile(noChildren, noCallbacks)
local profile = self.profile
for k,v in pairs(profile) do
profile[k] = nil
end
local defaults = self.defaults and self.defaults.profile
if defaults then
copyDefaults(profile, defaults)
end
-- populate to child namespaces
if self.children and not noChildren then
for _, db in pairs(self.children) do
DBObjectLib.ResetProfile(db, nil, noCallbacks)
end
end
-- Callback: OnProfileReset, database
if not noCallbacks then
self.callbacks:Fire("OnProfileReset", self)
end
end
--- Resets the entire database, using the string defaultProfile as the new default
-- profile.
-- @param defaultProfile The profile name to use as the default
function DBObjectLib:ResetDB(defaultProfile)
if defaultProfile and type(defaultProfile) ~= "string" and defaultProfile ~= true then
error(("Usage: AceDBObject:ResetDB(defaultProfile): 'defaultProfile' - string or true expected, got %q."):format(type(defaultProfile)), 2)
end
local sv = self.sv
for k,v in pairs(sv) do
sv[k] = nil
end
initdb(sv, self.defaults, defaultProfile, self)
-- fix the child namespaces
if self.children then
if not sv.namespaces then sv.namespaces = {} end
for name, db in pairs(self.children) do
if not sv.namespaces[name] then sv.namespaces[name] = {} end
initdb(sv.namespaces[name], db.defaults, self.keys.profile, db, self)
end
end
-- Callback: OnDatabaseReset, database
self.callbacks:Fire("OnDatabaseReset", self)
-- Callback: OnProfileChanged, database, profileKey
self.callbacks:Fire("OnProfileChanged", self, self.keys["profile"])
return self
end
--- Creates a new database namespace, directly tied to the database. This
-- is a full scale database in it's own rights other than the fact that
-- it cannot control its profile individually
-- @param name The name of the new namespace
-- @param defaults A table of values to use as defaults
function DBObjectLib:RegisterNamespace(name, defaults)
if type(name) ~= "string" then
error(("Usage: AceDBObject:RegisterNamespace(name, defaults): 'name' - string expected, got %q."):format(type(name)), 2)
end
if defaults and type(defaults) ~= "table" then
error(("Usage: AceDBObject:RegisterNamespace(name, defaults): 'defaults' - table or nil expected, got %q."):format(type(defaults)), 2)
end
if self.children and self.children[name] then
error(("Usage: AceDBObject:RegisterNamespace(name, defaults): 'name' - a namespace called %q already exists."):format(name), 2)
end
local sv = self.sv
if not sv.namespaces then sv.namespaces = {} end
if not sv.namespaces[name] then
sv.namespaces[name] = {}
end
local newDB = initdb(sv.namespaces[name], defaults, self.keys.profile, nil, self)
if not self.children then self.children = {} end
self.children[name] = newDB
return newDB
end
--- Returns an already existing namespace from the database object.
-- @param name The name of the new namespace
-- @param silent if true, the addon is optional, silently return nil if its not found
-- @usage
-- local namespace = self.db:GetNamespace('namespace')
-- @return the namespace object if found
function DBObjectLib:GetNamespace(name, silent)
if type(name) ~= "string" then
error(("Usage: AceDBObject:GetNamespace(name): 'name' - string expected, got %q."):format(type(name)), 2)
end
if not silent and not (self.children and self.children[name]) then
error(("Usage: AceDBObject:GetNamespace(name): 'name' - namespace %q does not exist."):format(name), 2)
end
if not self.children then self.children = {} end
return self.children[name]
end
--[[-------------------------------------------------------------------------
AceDB Exposed Methods
---------------------------------------------------------------------------]]
--- Creates a new database object that can be used to handle database settings and profiles.
-- By default, an empty DB is created, using a character specific profile.
--
-- You can override the default profile used by passing any profile name as the third argument,
-- or by passing //true// as the third argument to use a globally shared profile called "Default".
--
-- Note that there is no token replacement in the default profile name, passing a defaultProfile as "char"
-- will use a profile named "char", and not a character-specific profile.
-- @param tbl The name of variable, or table to use for the database
-- @param defaults A table of database defaults
-- @param defaultProfile The name of the default profile. If not set, a character specific profile will be used as the default.
-- You can also pass //true// to use a shared global profile called "Default".
-- @usage
-- -- Create an empty DB using a character-specific default profile.
-- self.db = LibStub("AceDB-3.0"):New("MyAddonDB")
-- @usage
-- -- Create a DB using defaults and using a shared default profile
-- self.db = LibStub("AceDB-3.0"):New("MyAddonDB", defaults, true)
function AceDB:New(tbl, defaults, defaultProfile)
if type(tbl) == "string" then
local name = tbl
tbl = _G[name]
if not tbl then
tbl = {}
_G[name] = tbl
end
end
if type(tbl) ~= "table" then
error(("Usage: AceDB:New(tbl, defaults, defaultProfile): 'tbl' - table expected, got %q."):format(type(tbl)), 2)
end
if defaults and type(defaults) ~= "table" then
error(("Usage: AceDB:New(tbl, defaults, defaultProfile): 'defaults' - table expected, got %q."):format(type(defaults)), 2)
end
if defaultProfile and type(defaultProfile) ~= "string" and defaultProfile ~= true then
error(("Usage: AceDB:New(tbl, defaults, defaultProfile): 'defaultProfile' - string or true expected, got %q."):format(type(defaultProfile)), 2)
end
return initdb(tbl, defaults, defaultProfile)
end
-- upgrade existing databases
for db in pairs(AceDB.db_registry) do
if not db.parent then
for name,func in pairs(DBObjectLib) do
db[name] = func
end
else
db.RegisterDefaults = DBObjectLib.RegisterDefaults
db.ResetProfile = DBObjectLib.ResetProfile
end
end