From ffcda0b044c85d6cbebc5990ddf4653ce892e78c Mon Sep 17 00:00:00 2001
From: shagu <ericmauser@googlemail.com>
Date: Mon, 18 Jan 2021 17:36:09 +0100
Subject: [PATCH] chat: add option to display chat history

---
 api/config.lua   |  1 +
 modules/chat.lua | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 modules/gui.lua  |  1 +
 3 files changed, 53 insertions(+)

diff --git a/api/config.lua b/api/config.lua
index 2646b512..7412026c 100644
--- a/api/config.lua
+++ b/api/config.lua
@@ -610,6 +610,7 @@ function pfUI:LoadConfig()
   pfUI:UpdateConfig("chat",       "text",        "input_width",      "0")
   pfUI:UpdateConfig("chat",       "text",        "input_height",     "0")
   pfUI:UpdateConfig("chat",       "text",        "outline",          "1")
+  pfUI:UpdateConfig("chat",       "text",        "history",          "1")
   pfUI:UpdateConfig("chat",       "text",        "mouseover",        "0")
   pfUI:UpdateConfig("chat",       "text",        "bracket",          "[]")
   pfUI:UpdateConfig("chat",       "text",        "time",             "0")
diff --git a/modules/chat.lua b/modules/chat.lua
index 05eaa98e..4ff96328 100644
--- a/modules/chat.lua
+++ b/modules/chat.lua
@@ -19,6 +19,39 @@ pfUI:RegisterModule("chat", "vanilla:tbc", function ()
     end
   end)
 
+  local realm = GetRealmName()
+  local player = UnitName("player")
+  local history
+  local function SaveChatHistory(id, msg, r, g, b)
+    -- create cache tables if not existing
+    pfUI_cache = pfUI_cache or {}
+    pfUI_cache["chathistory"] = pfUI_cache["chathistory"] or {}
+    pfUI_cache["chathistory"][realm] = pfUI_cache["chathistory"][realm] or {}
+    pfUI_cache["chathistory"][realm][player] = pfUI_cache["chathistory"][realm][player] or {}
+    pfUI_cache["chathistory"][realm][player][id] = pfUI_cache["chathistory"][realm][player][id] or {}
+
+    if r and g and b then
+      local color = rgbhex(r*.6, g*.6, b*.6)
+      msg = string.gsub(msg, "^", color)
+      msg = string.gsub(msg, "|r", "|r" .. color)
+    end
+
+    history = pfUI_cache["chathistory"][realm][player][id]
+    table.insert(history, 1, msg)
+    if history[30] then table.remove(history, 30) end
+  end
+
+  local function GetChatHistory(id)
+    -- create cache tables if not existing
+    pfUI_cache = pfUI_cache or {}
+    pfUI_cache["chathistory"] = pfUI_cache["chathistory"] or {}
+    pfUI_cache["chathistory"][realm] = pfUI_cache["chathistory"][realm] or {}
+    pfUI_cache["chathistory"][realm][player] = pfUI_cache["chathistory"][realm][player] or {}
+    pfUI_cache["chathistory"][realm][player][id] = pfUI_cache["chathistory"][realm][player][id] or {}
+
+    return pfUI_cache["chathistory"][realm][player][id]
+  end
+
   pfUI.chat = CreateFrame("Frame",nil,UIParent)
 
   pfUI.chat.left = CreateFrame("Frame", "pfChatLeft", UIParent)
@@ -701,6 +734,13 @@ pfUI:RegisterModule("chat", "vanilla:tbc", function ()
       text = timecolorhex .. tleft .. date(C.chat.text.timeformat) .. tright .. "|r " .. text
     end
 
+    -- save chat history
+    if C.chat.global.whispermod == "1" and string.find(text, wcol, 1) == 1 then
+      SaveChatHistory(frame:GetID(), string.gsub(text, wcol, ""), cr, cg, cb)
+    else
+      SaveChatHistory(frame:GetID(), text, a1, a2, a3)
+    end
+
     if C.chat.global.whispermod == "1" then
       -- patch incoming whisper string to match the colors
       if string.find(text, wcol, 1) == 1 then
@@ -713,6 +753,17 @@ pfUI:RegisterModule("chat", "vanilla:tbc", function ()
 
   for i=1,NUM_CHAT_WINDOWS do
     if not _G["ChatFrame"..i].HookAddMessage then
+      if C.chat.text.history == "1" then
+        -- write history to chat
+        local history = GetChatHistory(i)
+        for j=30,0,-1 do
+          if history[j] then
+            _G["ChatFrame"..i]:AddMessage(history[j], .6,.6,.6)
+          end
+        end
+      end
+
+      -- add chat parse and history hooks
       _G["ChatFrame"..i].HookAddMessage = _G["ChatFrame"..i].AddMessage
       _G["ChatFrame"..i].AddMessage = AddMessage
     end
diff --git a/modules/gui.lua b/modules/gui.lua
index a8ec6211..ae9d7743 100644
--- a/modules/gui.lua
+++ b/modules/gui.lua
@@ -2092,6 +2092,7 @@ pfUI:RegisterModule("gui", "vanilla:tbc", function ()
       CreateConfig(nil, T["Inputbox Width"], C.chat.text, "input_width")
       CreateConfig(nil, T["Inputbox Height"], C.chat.text, "input_height")
       CreateConfig(nil, T["Enable Text Shadow"], C.chat.text, "outline", "checkbox")
+      CreateConfig(nil, T["Enable Chat History"], C.chat.text, "history", "checkbox")
       CreateConfig(nil, T["Show Items On Mouseover"], C.chat.text, "mouseover", "checkbox")
       CreateConfig(nil, T["Chat Default Brackets"], C.chat.text, "bracket", nil, nil, nil, nil, "STRING")
       CreateConfig(nil, T["Enable Timestamps"], C.chat.text, "time", "checkbox")