Welcome to LibWho-2.0!

This documentation is for developers, it you're a user: just don't care.

• An Interface for a information's about an user
• Better event for who's
• Queuing of /who and SendWho()
• A much better who interface, with guarantee to be executed & callback

This version is 2.0, please do not run them together with 1.0 or other who libraries.

Usage

There are two ways of using WhoLib: embedding into an object or using the library directly

Embedded

-- at the beginning of your addon
LibStub:GetLibaray('LibWho-2.0'):Embed(self)

-- call a function within an method:
function mod:xxx(...)
  self:UserInfo(...)
end

External

-- at the beginning of your addon
local wholib = LibStub:GetLibrary('LibWho-2.0'):Library()

-- call a function:
wholib:UserInfo(...)

Remarks

The examples in this documentation uses the embedded version, but it should be easy to adopt them to external.

API Documentation

lib:Embed(handler)

Args

handler

table - embed the public functions/constants in the object specified by handler

Returns

nil

Example

LibStub:GetLibrary('LibWho-2.0'):Embed(self)

lib:Library()

Returns

table - the library

Example

LibStub:GetLibrary('LibWho-2.0'):Library()

:UserInfo(name [, opts])

Args

name

string - the exact name of an player

opts

optional, table - options

opts.queue

optional, number - queue of this query (see below) - .WHOLIB_QUEUE_QUIET (default) or .WHOLIB_QUEUE_SCANNING

opts.timeout

optional, number - if the the result is cached, and not older than opts.timeout minutes the cache will be returned, negative value: always use cache (if available), otherwise: send a who query, default: 5 (minutes)

opts.callback, opts.handler

optional, callback - see "Callback info" below

opts.flags

optional, number - one of more flags or'ed together, see Flags (bit.bor(flag1, flag2 [, flag3 [, ...]]))

Returns

nil

if there was no appropriate cache

false

see Flags: WHOLIB_FLAG_ALWAYS_CALLBACK

user, time

for cached results

user

table - the user's information's

user.Name

string - name of the player

user.Online

true if online, false if offline, nil if unknown (more results than could be displayed)

if Online is not true than all following entries will be from the last successful call, or nil

user.Guild

string - guild or ''

user.Class

string - class

user.Race

string - race

user.Level

string - level

user.Zone

string - zone

time

number - the minutes how old the data was

Remarks

If you're only interested in this feature, then you don't have to read about :Who() and WHOLIB_QUERY_RESULT.
Do not use .WHOLIB_FLAG_ALWAYS_CALLBACK when scanning a list over and over again, do a 5 sec pause after a cached return, cause you may have a short list and a cache time so high that all entries may be cached and in that case this function DO generate an almost infinite loop!

Callback

When a callback function is given and the function didn't returned immediately then the callback will be raised when they're a result. The callback function will receive the same arguments as :UserInfo() would return.

Flags

.WHOLIB_FLAG_ALWAYS_CALLBACK

if :UserInfo() would return the cached data, raise the callback immediately with that data instead returning and then return false

Example

-- long version
local user, time = self:UserInfo(friendsname, { callback = 'UserDataReturned' } )
if user then
  -- the data was immediately available
  self:UserDataReturned(user, time)
else
  -- nothing
  -- we will be called when the data is available
end

-- short version
self:UserData(friendsname, { callback = 'UserDataReturned', flags = self.WHOLIB_FLAG_ALWAYS_CALLBACK } )

-- callback function
function mod:UserDataReturned(user, time)
  local state
  if user.Online == true then
    state = 'Online'
  elseif user.Online == false then
    state = 'Offline'
  else
    -- user.Online is nil
    state = 'Unknown'
  end
  DEFAULT_CHAT_FRAME:AddMessage(user.Name .. ' is ' .. state)
end

:CachedUserInfo(name)

Args

name

string - the exact name of an player

Returnes

nil

if there was no appropriate cache

user, time

for cached results

identical to :UserInfo()

:RegisterCallback(event, callback [,handler])

Args

event

string - the event you are want to be registered for

callback, handler

callback - see "Callback info" below

Returns

nil

Example

see "Events" below

:Who(query [ , opts])

Args

query

string - the search string

opts

optional, table - options

opts.queue

optional, number - queue of this query (see below) - .WHOLIB_QUEUE_QUIET (default) or .WHOLIB_QUEUE_USER or .WHOLIB_QUEUE_SCANNING

opts.callback, opts.handler

optional, callback - see "Callback info" below

Returns

nil

Remarks

This is an event registration via CallbackHandler-1.0 Everything except query will be ignored when the queue is .WHOLIB_QUEUE_USER.
If you've already registered WHOLIB_QUERY_RESULT then you may be don't need a callback.

Callback

When a callback function is given then the callback will be raised after the query is executed. The callback function will receive the same arguments as the event :WHOLIB_QUERY_RESULT has.

Example

self:Who({query = 'n-' .. friendsname, queue = self.WHOLIB_QUERY_QUIET, callback = 'DisplayPlayers'})
-- self:DisplayPlayers is in the WHOLIB_QUERY_RESULT example below

Remarks

If you're only interested in the information of one player, use :UserInfo() instead. (You can set opts.timeout to 0 if you don't accept cached data.)

Constants

.WHOLIB_QUEUE_USER

.WHOLIB_QUEUE_QUIET

.WHOLIB_QUEUE_SCANNING

.WHOLIB_FLAG_ALWAYS_CALLBACK

Callback info

Some WhoLib functions accepts its own form of callbacks, or callbacks via CallbackHandler, you have always two ways using them.

Using a function

callback

function - just point to the function, which should be called

handler

nil - must be nil

Example 1

local function eventmanager(event, a1, a2, ...)
  -- has no 'self'
end

wholib:RegisterCallback('WHOLIB_QUERY_RESULT', eventmanager)

Example 2

function mod.eventmanager(event, a1, a2, ...)
  -- has no 'self'
end

wholib:RegisterCallback('WHOLIB_QUERY_RESULT', mod.eventmanager)

Using a method

callback

string - the name of the method, which should be called

handler

table - the object on which the method should be called, if nil the calling object is used

Example

function mod:eventmanager(event, a1, a2, ...)
  -- has 'self'
end

mod:RegisterCallback('WHOLIB_QUERY_RESULT', 'eventmanager')
-- is equivalent to
wholib:RegisterCallback('WHOLIB_QUERY_RESULT', 'eventmanager', self)

Events

Event: WHOLIB_QUERY_RESULT - query, results, complete, name

Args

query

string - search string

results

table - table of results

results[i].Name

string - name of the player

results[i].Online

true if online, false if offline, nil if unknown (more results than could be displayed)

results[i].Guild

string - guild or ''

results[i].Class

string - class

results[i].Race

string - race

results[i].Level

string - level

results[i].Zone

string - zone

complete

boolean - shows whether all results could be returned (true) or not (false), if not, do a more specific query

name

string - if the query was initiated by a :UserInfo() call, then this is the player name of the :UserInfo() call, otherwise nil

Remarks

All these fields are returned when any one call "/who" "SendWho()" or :Who(), even when the results are displayed in the chat.

Example

function mod:OnEnable()
  ...
  self:RegisterCallback('WHOLIB_QUERY_RESULT', 'DisplayPlayers')
  ...
end

function mod:DisplayPlayers(query, results, complete)
  if not complete then
    DEFAULT_CHAT_FRAME:AddMessage('There were more Players than here shown!')
  end
  for _,result in pairs(results) do
    DEFAULT_CHAT_FRAME:AddMessage('Player ' .. result.Name .. ' is currently in ' .. result.Zone)
  end
end

Queues

WHOLIB_QUEUE_USER

Used on user queries (e.g. "/who", SocialFrame's Who)
Will display the results in chat if only some, or in who-frame if more.

WHOLIB_QUEUE_QUIET

Should be standard queue for addon queries, which aren't for scanning, and do not result in a user action: use .WHOLIB_QUEUE_USER.
Will neither show chat messages nor who-frame.
Will be slowly queried while the WhoFrame is open. (TODO)

WHOLIB_QUEUE_SCANNING

Use for scanning.
Will neither show chat messages nor who-frame.
Will not be queried while the WhoFrame is open. (TODO)

Remarks

At first the .WHOLIB_QUEUE_USER queries will be executed, then the .WHOLIB_QUEUE_QUIET and at last the .WHOLIB_QUEUE_SCANNING.

Debug

When debugging is enabled then the chat will be filled with added/returned entries, one for each query.

21:01:40 WhoLib: [3] added "n-Lager", queues=0, 0, 1
21:01:40 WhoLib: [3] returned "n-Lager", total=0, queues=0, 0, 0

The [3] means Queue 3 = WHOLIB_QUEUE_SCANNING, each query will at first be "added" and later "returned", on returned queries the total number of entries will also be printed. The "queues=0, 0, 1" means that 0 queries are in the .WHOLIB_QUEUE_USER queue, 0 in .WHOLIB_QUEUE_QUIET, and 1 (the added one) in .WHOLIB_QUEUE_SCANNING.
For :UserInfo() even more entries will be printed.

:SetWhoLibDebug(state)

Args

state

boolean - Enables or disables the debugging

Returns

nil

/wholibdebug

Toggles the debugging.

TODO

• localization
• maybe better English texts
• cleaning code?
• see WHOLIB_QUEUE_QUIET's TODO

Remarks

If someone wants to help me, just drop a note - or do it!
ALeX Kazik - alx@kazik.de