[Snippet] GetHost 2.0

[Azlier]

This gets the host of a game. Remember that rather unreliable game cache syncing version? This is faster, and possible more reliable.

But, GetHost does not work on Map Initialization. Using TriggerRegisterHostDetected will fire any triggers registered to it immediately after a host is found. GetHost can be used in those triggers.

OnHostDetect is much the same, but it takes and fires a code variable instead. This action cannot be undone. The code must return a boolean, preferably false.

GetHost returns the host of a game. Once again, it doesn't work on map initialization.

Requires Event.

library GetHost initializer Init requires Event

globals
    private unit array U
    private player Host = null
    private trigger OnDetect = CreateTrigger()
    private group Group = CreateGroup()
    private unit Enummed = null
    private Event Ev
endglobals

constant function GetHost takes nothing returns player
    return Host
endfunction

function OnHostDetect takes code c returns nothing
    call TriggerAddCondition(OnDetect, Condition(c))
endfunction

function TriggerRegisterHostDetected takes trigger t returns nothing
    call Ev.register(t)
endfunction

private function CalculateHost takes nothing returns boolean
    if Host == null then
        set Host = GetOwningPlayer(GetTriggerUnit())
        call TriggerEvaluate(OnDetect)
        call Ev.fire()
    endif
    return false
endfunction

private function FindSelected takes nothing returns boolean
    if Enummed == null then
        set Enummed = GetFilterUnit()
    endif
    return false
endfunction

private function RecalculateHost takes nothing returns boolean
    local integer i
    if GetTriggerPlayer() == Host then
        set i = 11
        set Host = null
        loop
            set Enummed = null
            call GroupEnumUnitsSelected(Group, Player(i), Filter(function FindSelected))
            if GetLocalPlayer() == Player(i) then
                call SelectUnit(Enummed, false)
                call SelectUnit(U[i], true)
                call SelectUnit(U[i], false)
                call SelectUnit(Enummed, true)
            endif
            exitwhen i == 0
            set i = i - 1
        endloop
    endif
    return false
endfunction

private function Init takes nothing returns nothing
    local trigger t = CreateTrigger()
    local integer i = 11
    set Ev = Event.create()
    call TriggerAddCondition(t, Condition(function CalculateHost))
    loop
        set U[i] = CreateUnit(Player(i), 'hfoo', 10000, 10000, 270)
        call PauseUnit(U[i], true)
        call TriggerRegisterUnitEvent(t, U[i], EVENT_UNIT_SELECTED)
        set Enummed = null
        call GroupEnumUnitsSelected(Group, Player(i), Filter(function FindSelected))
        if GetLocalPlayer() == Player(i) then
            call SelectUnit(Enummed, false)
            call SelectUnit(U[i], true)
            call SelectUnit(U[i], false)
            call SelectUnit(Enummed, true)
        endif
        exitwhen i == 0
        set i = i - 1
    endloop

    set t = CreateTrigger()
    set i = 11
    loop
        call TriggerRegisterPlayerEvent(t, Player(i), EVENT_PLAYER_LEAVE)
        exitwhen i == 0
        set i = i - 1
    endloop
    call TriggerAddCondition(t, Condition(function RecalculateHost))
endfunction

endlibrary

[saw792]

Missing initializer, Host variable is private, no GetHost() function, there's no GetTriggerPlayer() for regular unit events (unless that's not true and that's how it works?), and SELECTED is misspelled in the unit event line.

[Azlier]

Blah. I wish I checked it.

I hate not having WC3.

Also, GetOwningPlayer(GetTriggerUnit()) won't quite work. Does... GetTriggerPlayer work in selection cases like this?

If not, I'll need to use PlayerUnitEvents.

[saw792]

Oh and your Initializer returns boolean, and host will return null until someone leaves, I believe...

Could you explain how this is supposed to work?

[Azlier]

Simple, really. When selecting a unit via triggers, delay actually kicks in for the firing of the selection event. The player with the absolute lowest delay (host) will be registered first.

>host will return null until someone leaves, I believe...

Can't... stop... FAILING!

[saw792]

Yeah this really won't work, sorry Azlier. You need to use the player unit event in order to get a GetTriggerPlayer() to return an actual player. The selection thing can only really work if you are storing a different value for each player, which means that you have to use GetLocalPlayer() to select the unit locally so there's no net traffic.

[Azlier]

>The selection thing can only really work if you are storing a different value for each player,

...Hmm? If the game decides to wait, and fire all at once, it won't work. Experience shows that it doesn't do that, but if it does... I have another method to try. Azlier always has something up his sleeve!

>You need to use the player unit event in order to get a GetTriggerPlayer() to return an actual player.

So be it.

[saw792]

Hmm it depends whether SelectUnit() actually sends any net traffic... I can't be sure. Anyway let me test it

[Azlier]

SelectUnit is unsynced at first, but it soon syncs itself out (I assume it takes the maximum delay time). SyncSelections does it immediately.

I'll soon need to patch this to work in the event that the host leaves and the players have filled selection groups.

[saw792]

I just tested it in single player, it returns Player 16 as the host. Stand by for bnet test.

[Azlier]

That can't be good. Player 16 doesn't exist.

I know what you mean, however.

GetTriggerPlayer returns the owner of the unit?

How useless. I'll need to resort my other method. Tomorrow... tomorrow...

[saw792]

Player 16, as in Player(15), since I'm using GetPlayerName().

[Azlier]

Ah. Other method it is, then. I hate Blizzard.

[Jesus4Lyf]

Keep it up guys, I'm sure you'll get this working.
+rep

[Azlier]

This is totally untested. It gets the player in Single Player, however. So I'll assume it works, but I still need real tests.

library GetHost initializer Init

globals
    private unit array U
    private player Host = null
endglobals

constant function GetHost takes nothing returns player
    return Host
endfunction

private function CalculateHost takes nothing returns boolean
    if Host == null then
        set Host = GetOwningPlayer(GetTriggerUnit())
    endif
    return false
endfunction

private function RecalculateHost takes nothing returns boolean
    local integer i = 11
    set Host = null
    loop
        if GetLocalPlayer() == Player(i) then
            call SelectUnit(U[i], true)
            call SelectUnit(U[i], false)
        endif
        exitwhen i == 0
        set i = i - 1
    endloop
    return false
endfunction

private function Init takes nothing returns nothing
    local trigger t = CreateTrigger()
    local integer i = 11
    call TriggerAddCondition(t, Condition(function CalculateHost))
    loop
        set U[i] = CreateUnit(Player(i), 'hfoo', 10000, 10000, 270)
        call PauseUnit(U[i], true)
        call TriggerRegisterUnitEvent(t, U[i], EVENT_UNIT_SELECTED)
        if GetLocalPlayer() == Player(i) then
            call SelectUnit(U[i], true)
            call SelectUnit(U[i], false)
        endif
        exitwhen i == 0
        set i = i - 1
    endloop

    set t = CreateTrigger()
    set i = 11
    loop
        call TriggerRegisterPlayerEvent(t, Player(i), EVENT_PLAYER_LEAVE)
        exitwhen i == 0
        set i = i - 1
    endloop
    call TriggerAddCondition(t, Condition(function RecalculateHost))
endfunction

endlibrary