ChatFilter.lua

-- ============================================================
-- ChatFilter.lua  —  hides CleanBot's own whisper/command chatter from the chat
-- window to cut spam. Display-only: ChatFrame message filters intercept the chat-
-- frame display pipeline, NOT addon RegisterEvent handlers, so Bridge.lua keeps
-- parsing every line — we only stop the user-facing echo of the commands we send
-- and the replies we consume.
--
-- Gated on NS.hideBotChatter (Settings → "Hide Bot Chatter", default on; toggle off
-- to see raw traffic for testing). Read live on each call, so no /reload is needed.
-- ============================================================
local NS = CleanBotNS

local function enabled()
    return NS.hideBotChatter ~= false
end

-- A whisper is suppressible when the other party is a bot we manage OR a current
-- group member. The group-member case covers the no-bridge discovery handshake, where
-- a member isn't in CleanBot_PartyBots yet but is being probed (the "co ?" we send and
-- the "Strategies:" reply). CB_FindPartyUnit walks party AND raid.
---@param name string|nil  Whisper sender (incoming) or recipient (outgoing).
---@return boolean
local function suppressibleParty(name)
    if not name or name == "" then return false end
    if CleanBot_PartyBots[strlower(name)] then return true end
    return (NS.CB_FindPartyUnit and NS.CB_FindPartyUnit(name) ~= nil) or false
end

-- Filters run once PER CHAT WINDOW displaying the event, so a filter that consumes a
-- tag must hand every window the same verdict for the same line — otherwise window 1
-- eats the tag and window 2 shows the echo. Each consuming filter remembers its last
-- (line key, frame time) decision and replays it for repeat invocations in the same
-- frame (all windows process a line at one GetTime()).
---@param cache  table          Per-filter { key=, at=, verdict= } memo.
---@param key    string         Identity of the line being filtered.
---@param decide fun():boolean  Evaluates (and consumes) on the first invocation only.
---@return boolean
local function replayable(cache, key, decide)
    local now = GetTime()
    if cache.key == key and cache.at == now then return cache.verdict end
    cache.key, cache.at, cache.verdict = key, now, decide()
    return cache.verdict
end

-- Outgoing: hide only the command whispers CleanBot itself sent, so a command you type by hand
-- to a bot stays visible. Bridge.lua tags each addon-sent whisper in NS.selfWhispers (keyed by
-- recipient+text); we consume one matching tag per INFORM. No tag → it's a manual whisper, show
-- it. Tags older than SELF_WHISPER_TTL are purged: a failed send fires no INFORM, so its tag
-- must not linger and wrongly hide a later identical manual command.
local SELF_WHISPER_TTL = 3
local informSeen = {}
local function filterWhisperInform(_, _, msg, recipient)
    if not enabled() or not suppressibleParty(recipient) then return false end
    local key = strlower(recipient or "") .. "\0" .. (msg or "")
    return replayable(informSeen, key, function()
        local store = NS.selfWhispers
        local list  = store and store[key]
        if not list then return false end
        local now = GetTime()
        while list[1] and (now - list[1]) > SELF_WHISPER_TTL do
            table.remove(list, 1)   -- drop stale tags (sends that never produced an INFORM)
        end
        if list[1] then
            table.remove(list, 1)   -- consume this addon-sent whisper
            return true
        end
        return false
    end)
end

-- Outgoing broadcast: hide the player's own party/raid echo of a command CleanBot broadcast (the
-- action bar buttons + Manage tab go through CB_SendGroupCommand, which tags each send in
-- NS.selfGroupMessages). Keyed by text, consumed one-per-echo with a short TTL so a failed send can't
-- leave a tag that hides a later identical line; the sender check keeps another member's identical
-- message visible. The overhear listener still sees the line (filters touch display only, not events).
local SELF_GROUP_TTL = 3
local groupSeen = {}
local function filterGroup(_, _, msg, sender)
    if not enabled() then return false end
    if not (NS.CB_IsSelfSender and NS.CB_IsSelfSender(sender, UnitName("player"))) then return false end
    return replayable(groupSeen, (msg or "") .. "\0" .. (sender or ""), function()
        local list = NS.selfGroupMessages and NS.selfGroupMessages[msg or ""]
        if not list then return false end
        local now = GetTime()
        while list[1] and (now - list[1]) > SELF_GROUP_TTL do
            table.remove(list, 1)
        end
        if list[1] then
            table.remove(list, 1)
            return true
        end
        return false
    end)
end

NS.INVENTORY_BURST_SILENCE = 2.0
NS.botInInventoryBurst = NS.botInInventoryBurst or {}

--- Checks if a whisper line matches the structure of mod-playerbots inventory dump
--- ("=== Inventory ===", category headers "--- other ---", item links "|Hitem:", or "Discount up to:").
---@param msg string|nil
---@return boolean
local function isInventoryBurstLine(msg)
    if not msg or msg == "" then return false end
    if msg:match("^===%s*[iI]nventory%s*===") then return true end
    if msg:match("^%s*%-%-%- .+ %-%-%-%s*$") then return true end
    if msg:find("|Hitem:", 1, true) then return true end
    if msg:match("^Discount up to:") then return true end
    return false
end

--- Arms an extended reply window (2.0s) for an expected inventory dump from a bot (e.g. on TRADE_SHOW).
--- Avoids degradation if standard CB_MarkExpectReply (0.5s) was previously called.
---@param botName string
NS.CB_ArmInventoryBurst = function(botName)
    if not enabled() or not botName or botName == "" then return end
    local key = strlower(botName)
    NS.botReplyWindow = NS.botReplyWindow or {}
    NS.botInInventoryBurst = NS.botInInventoryBurst or {}
    local now = GetTime()
    local burstDeadline = now + (NS.INVENTORY_BURST_SILENCE or 2.0)
    NS.botReplyWindow[key] = math.max(NS.botReplyWindow[key] or 0, burstDeadline)
    NS.botInInventoryBurst[key] = true
end

-- Incoming: hide a bot's reply while its command-reply window is open (see CB_MarkExpectReply
-- in Bridge.lua) or during an inventory dump burst (TradeStatusAction::BeginTrade in mod-playerbots).
-- The window opens when we whisper a command or trade with a bot, and is slid forward on each
-- matching line, closing once the bot goes quiet. Unsolicited bot greetings (a bot's readiness
-- whisper, with no command before it) are intentionally NOT hidden.
local whisperSeen = {}
local function filterWhisper(_, _, msg, sender)
    if not enabled() or not suppressibleParty(sender) then return false end
    local replayKey = (msg or "") .. "\0" .. strlower(sender or "")
    return replayable(whisperSeen, replayKey, function()
        local key = strlower(sender)
        local now = GetTime()

        -- Inventory dump header
        if msg and msg:match("^===%s*[iI]nventory%s*===") then
            NS.botReplyWindow = NS.botReplyWindow or {}
            NS.botInInventoryBurst = NS.botInInventoryBurst or {}
            NS.botInInventoryBurst[key] = true
            NS.botReplyWindow[key] = now + (NS.INVENTORY_BURST_SILENCE or 2.0)
            return true
        end

        local deadline = NS.botReplyWindow and NS.botReplyWindow[key]
        if deadline and now < deadline then
            if NS.botInInventoryBurst and NS.botInInventoryBurst[key] then
                if isInventoryBurstLine(msg) then
                    if msg:match("^Discount up to:") then
                        -- End of burst in random bots
                        NS.botInInventoryBurst[key] = nil
                        NS.botReplyWindow[key] = nil
                    else
                        NS.botReplyWindow[key] = now + (NS.INVENTORY_BURST_SILENCE or 2.0)
                    end
                    return true
                end
                return false
            end

            NS.botReplyWindow[key] = now + NS.WHISPER_SILENCE
            return true
        end

        if NS.botInInventoryBurst and NS.botInInventoryBurst[key] then
            NS.botInInventoryBurst[key] = nil
        end

        return false
    end)
end

-- System: hide the server output CleanBot triggers and already parses — the self-bot
-- "player botAI" toggle line, the "Linked accounts:" dump, and the per-name bot-add
-- results. collectingLinked is tracked locally (not off Bridge's flag) so it stays
-- consistent regardless of filter-vs-handler ordering for the same line.
local collectingLinked = false

-- Result words that mark a line as ".playerbots bot add/addaccount/login/remove" output.
local BOT_CMD_RESULTS = {
    "player already logged in",
    "player is offline",
    "not your bot",
    " - ok",
    "logged in",
}

local function filterSystem(_, _, msg)
    if not enabled() or not msg then return false end
    local lower = strlower(msg)

    if lower:find("player botai", 1, true) then return true end

    if lower:find("linked accounts", 1, true) then
        collectingLinked = true
        return true
    end
    if collectingLinked then
        if msg:match("^%s*%-%s*%S+%s*$") then return true end   -- "- NAME" row
        collectingLinked = false                               -- non-row line ends the list
    end

    -- Per-name bot command results: "<cmd>: <Name> - <result>".
    if msg:match("^%a+:%s+%S+%s+%-%s+") then
        for _, word in ipairs(BOT_CMD_RESULTS) do
            if lower:find(word, 1, true) then return true end
        end
    end

    return false
end

-- World chat bubbles render as WorldFrame children, NOT through the chat-frame pipeline, so the
-- message filters above can't touch them. For our own broadcast commands we scan WorldFrame for the
-- bubble whose text matches and Hide() it every frame — only ours, leaving other members' bubbles
-- alone. A one-time Hide doesn't stick: the client owns the bubble's fade in/out alpha and re-shows
-- it, so we must keep re-hiding for the bubble's whole lifetime (a short single hide only swallows the
-- fade-in, then it pops back at full alpha). We match by TEXT and do NOT gate on IsShown, so (a) we
-- keep recognizing our own bubble after we've hidden it, and (b) once the client reuses that frame for
-- a different message its text no longer matches, so we never hide someone else's bubble. The window
-- comfortably covers a short command's bubble lifetime; cleared on expiry. Gated on Hide Bot Chatter.
local BUBBLE_HIDE_WINDOW = 6
local bubbleScanner
local pendingBubbles = {}   -- [exact text] = expiry GetTime()

local function scanAndHideBubbles()
    local now = GetTime()
    for text, expiry in pairs(pendingBubbles) do
        if now > expiry then pendingBubbles[text] = nil end
    end
    if not next(pendingBubbles) then bubbleScanner:SetScript("OnUpdate", nil) return end
    for _, child in ipairs({ WorldFrame:GetChildren() }) do
        if not (child.GetName and child:GetName()) then
            for _, region in ipairs({ child:GetRegions() }) do
                if region.GetObjectType and region:GetObjectType() == "FontString" then
                    local t = region:GetText()
                    if t and pendingBubbles[t] then child:Hide() end
                end
            end
        end
    end
end

--- Suppresses the world chat bubble for one of our own broadcast commands (no-op when chatter-hiding
--- is off). Call right after broadcasting the command text.
---@param text string  Exact message text we just sent to party/raid.
NS.CB_HideOwnBubble = function(text)
    if not enabled() or not text or text == "" then return end
    pendingBubbles[text] = GetTime() + BUBBLE_HIDE_WINDOW
    bubbleScanner = bubbleScanner or CreateFrame("Frame", "CleanBotBubbleScanner")
    bubbleScanner:SetScript("OnUpdate", scanAndHideBubbles)
end

ChatFrame_AddMessageEventFilter("CHAT_MSG_WHISPER_INFORM", filterWhisperInform)
ChatFrame_AddMessageEventFilter("CHAT_MSG_WHISPER",        filterWhisper)
ChatFrame_AddMessageEventFilter("CHAT_MSG_SYSTEM",         filterSystem)
-- Our own broadcast echo arrives as PARTY/RAID (or the *_LEADER variant when we lead the group).
ChatFrame_AddMessageEventFilter("CHAT_MSG_PARTY",          filterGroup)
ChatFrame_AddMessageEventFilter("CHAT_MSG_PARTY_LEADER",   filterGroup)
ChatFrame_AddMessageEventFilter("CHAT_MSG_RAID",           filterGroup)
ChatFrame_AddMessageEventFilter("CHAT_MSG_RAID_LEADER",    filterGroup)