irc: standardize history dir to host_port; add legacy name_host_port fallback when loading

Signed-off-by: Slendi <slendi@socopon.com>

main.lua

@@ -93,6 +93,15 @@ function IrcChatView:sanitizePathPart(part)
 end
 
 function IrcChatView:getServerId()
+    -- Stable ID independent of display name
+    local host = self._server and (self._server.host or "") or ""
+    local port = self._server and tostring(self._server.port or 6667) or "6667"
+    local id = string.format("%s_%s", host, port)
+    return self:sanitizePathPart(id)
+end
+
+function IrcChatView:getLegacyServerId()
+    -- Old scheme: name_host_port (used briefly); try loading history from there, if present
     local name = self._server and (self._server.name or "") or ""
     local host = self._server and (self._server.host or "") or ""
     local port = self._server and tostring(self._server.port or 6667) or "6667"
@@ -105,6 +114,8 @@ function IrcChatView:initHistory()
     lfs.mkdir(self._history_dir)
     self._history_server_dir = self._history_dir .. "/" .. self:getServerId()
     lfs.mkdir(self._history_server_dir)
+    -- Legacy path support
+    self._history_server_dir_legacy = self._history_dir .. "/" .. self:getLegacyServerId()
 end
 
 function IrcChatView:getLogPath(target)
@@ -113,6 +124,12 @@ function IrcChatView:getLogPath(target)
     return string.format("%s/%s.log", self._history_server_dir, fname)
 end
 
+function IrcChatView:getLegacyLogPath(target)
+    target = target or "*"
+    local fname = target == "*" and "console" or self:sanitizePathPart(target)
+    return string.format("%s/%s.log", self._history_server_dir_legacy, fname)
+end
+
 function IrcChatView:writeHistory(target, line)
     local path = self:getLogPath(target)
     local f = io.open(path, "a")
@@ -163,6 +180,11 @@ function IrcChatView:preloadHistory(target)
     if self._buffers[target] and #self._buffers[target] > 0 then return end
     local path = self:getLogPath(target)
     local content = self:readLastLines(path, self._history_preload_lines)
+    if (not content or #content == 0) and self._history_server_dir_legacy then
+        -- Fallback to legacy path if it exists
+        local lpath = self:getLegacyLogPath(target)
+        content = self:readLastLines(lpath, self._history_preload_lines)
+    end
     if content and #content > 0 then
         self._buffers[target] = content
         if target == (self._current_target or "*") and self.scroll_text_w and self.scroll_text_w.text_widget then