Add SimpleChatFilter AddOn.

SimpleChatFilter/README.md

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+# SimpleChatFilter
+World of Warcraft Classic AddOn to filter annoying spam from the general chat channels.

SimpleChatFilter/SimpleChatFilter.lua

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+local discardedPatterns = {
+    "wts.*boost",
+    "wtb.*boost",
+    "selling.*boost",
+    "wtb.*dmt",
+}
+
+
+local function simpleChatFilter(chatFrame, event, text, playerName, _, channelName, _, specialFlags, zoneChannelID, channelIndex, channelBaseName, _, lineID, guid)
+    local textLower = text:lower()
+    for _, pattern in pairs(discardedPatterns) do
+        if textLower:find(pattern) then
+            return true  -- discard message
+        end
+    end
+    return false
+end
+
+ChatFrame_AddMessageEventFilter("CHAT_MSG_CHANNEL", simpleChatFilter)
+print("[|cFFFF7777SimpleChatFilter|r] Discarding|cFFCCCCCC", table.concat(discardedPatterns, " |cFFFF7777|||cFFCCCCCC "), "|r")

SimpleChatFilter/SimpleChatFilter.toc

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+## Interface: 11305
+
+## Title: SimpleChatFilter
+## Notes: Simple chat filter.
+## Author: Caspervk
+## Version: 0.0.1
+
+## X-License: GNU General Public License v3 or later (GPLv3+)
+
+SimpleChatFilter.lua