refactor: summarize memory (#1508)

lua/avante/utils/history.lua

@@ -0,0 +1,52 @@
+local Utils = require("avante.utils")
+
+---@class avante.utils.history
+local M = {}
+
+---@param entries avante.ChatHistoryEntry[]
+---@return avante.ChatHistoryEntry[]
+function M.filter_active_entries(entries)
+  local entries_ = {}
+
+  for i = #entries, 1, -1 do
+    local entry = entries[i]
+    if entry.reset_memory then break end
+    if
+      entry.request == nil
+      or entry.original_response == nil
+      or entry.request == ""
+      or entry.original_response == ""
+    then
+      break
+    end
+    table.insert(entries_, 1, entry)
+  end
+
+  return entries_
+end
+
+---@param entries avante.ChatHistoryEntry[]
+---@return AvanteLLMMessage[]
+function M.entries_to_llm_messages(entries)
+  local messages = {}
+  for _, entry in ipairs(entries) do
+    local user_content = ""
+    if entry.selected_file ~= nil then
+      user_content = user_content .. "SELECTED FILE: " .. entry.selected_file.filepath .. "\n\n"
+    end
+    if entry.selected_code ~= nil then
+      user_content = user_content
+        .. "SELECTED CODE:\n\n```"
+        .. entry.selected_code.filetype
+        .. "\n"
+        .. entry.selected_code.content
+        .. "\n```\n\n"
+    end
+    user_content = user_content .. "USER PROMPT:\n\n" .. entry.request
+    table.insert(messages, { role = "user", content = user_content })
+    table.insert(messages, { role = "assistant", content = Utils.trim_think_content(entry.original_response) })
+  end
+  return messages
+end
+
+return M