Equipment Manager and Legion legendaries

[p3lim]

Legion legendaries are unique-equipped up to two at the same time, but the UseEquipmentSet API is stupid, it will fail should you try to swap to a different legendary without unequipping a previous one first (fails with the "Too many legendaries equipped" error).

Here is a dirty fix to the EquipmentManager_EquipSet function:

function EquipmentManager_EquipSet(name)
    if(EquipmentSetContainsLockedItems(name) or UnitCastingInfo('player')) then
        UIErrorsFrame:AddMessage(ERR_CLIENT_LOCKED_OUT, 1, 0.1, 0.1, 1)
        return
    end
 
    -- BUG: legion legendaries will halt the set equipping if the user is swapping
    -- different slotted legendaries beyond the 1/2 equipped limit
    local locations = GetEquipmentSetLocations(name)
    for inventoryID = 1, 17 do
        local itemLink = GetInventoryItemLink('player', inventoryID)
        if(itemLink) then
            local rarity = GetInventoryItemQuality('player', inventoryID)
            if(rarity == 5) then
                -- legendary item found, manually replace it with the item from the new set
                local action = EquipmentManager_EquipItemByLocation(locations[inventoryID], inventoryID)
                if(action) then
                    EquipmentManager_RunAction(action)
                end
            end
        end
    end
 
    UseEquipmentSet(name)
end

Non-blocking version:

function EquipmentManager_EquipSet(name)
    if(EquipmentSetContainsLockedItems(name) or UnitCastingInfo('player')) then
        UIErrorsFrame:AddMessage(ERR_CLIENT_LOCKED_OUT, 1, 0.1, 0.1, 1)
        return
    end
 
    -- BUG: legion legendaries will halt the set equipping if the user is swapping
    -- different slotted legendaries beyond the 1/2 equipped limit
    local locations = GetEquipmentSetLocations(name)
    for inventoryID = 1, 17 do
        local itemLink = GetInventoryItemLink('player', inventoryID)
        if(itemLink) then
            local rarity = GetInventoryItemQuality('player', inventoryID)
            if(rarity == 5) then
                -- legendary item found, manually replace it with the item from the new set
                local action = EquipmentManager_EquipItemByLocation(locations[inventoryID], inventoryID)
                if(action) then
                    EquipmentManager_RunAction(action)
                    locations[inventoryID] = nil
                end
            end
        end
    end
 
    -- Equip remaining items through _RunAction to avoid blocking from UseEquipmentSet
    for inventoryID, location in next, locations do
        local action = EquipmentManager_EquipItemByLocation(location, inventoryID)
        if(action) then
            EquipmentManager_RunAction(action)
        end
    end
end

[p3lim]

Fixed on the 7.2 PTR, build 23436.