Allow to open current msg with custom cmd

tg/controllers.py

@@ -392,15 +392,14 @@ class Controller:
         chat = self.model.chats.chats[self.model.current_chat]
         return chat["permissions"]["can_send_messages"]
 
-    @bind(msg_handler, ["l", "^J"])
-    def open_current_msg(self) -> None:
-        msg = MsgProxy(self.model.current_msg)
+    def _open_msg(self, msg: MsgProxy, cmd: str = None) -> None:
         if msg.is_text:
             with NamedTemporaryFile("w", suffix=".txt") as f:
                 f.write(msg.text_content)
                 f.flush()
                 with suspend(self.view) as s:
-                    s.open_file(f.name)
+                    if err_msg := s.open_file(f.name, cmd):
+                        self.present_error(err_msg)
             return
 
         path = msg.local_path
@@ -412,7 +411,20 @@ class Controller:
             return
         self.tg.open_message_content(chat_id, msg.msg_id)
         with suspend(self.view) as s:
-            s.open_file(path)
+            if err_msg := s.open_file(path, cmd):
+                self.present_error(err_msg)
+
+    @bind(msg_handler, ["!"])
+    def open_msg_with_cmd(self) -> None:
+        """Open msg or file with cmd: less %s"""
+        msg = MsgProxy(self.model.current_msg)
+        if cmd := self.view.status.get_input():
+            return self._open_msg(msg, cmd)
+
+    @bind(msg_handler, ["l", "^J"])
+    def open_current_msg(self) -> None:
+        msg = MsgProxy(self.model.current_msg)
+        self._open_msg(msg)
 
     @bind(msg_handler, ["e"])
     def edit_msg(self) -> None:
@@ -526,13 +538,16 @@ class Controller:
         self.resize()
 
         while True:
-            repeat_factor, keys = self.view.get_keys()
-            fun = handlers.get(keys, lambda *_: None)
-            res = fun(self, repeat_factor)  # type: ignore
-            if res == "QUIT":
-                return res
-            elif res == "BACK":
-                return res
+            try:
+                repeat_factor, keys = self.view.get_keys()
+                fun = handlers.get(keys, lambda *_: None)
+                res = fun(self, repeat_factor)  # type: ignore
+                if res == "QUIT":
+                    return res
+                elif res == "BACK":
+                    return res
+            except Exception:
+                log.exception("Error happend in key handle loop")
 
     def resize_handler(self, signum: int, frame: Any) -> None:
         curses.endwin()

tg/utils.py

@@ -15,6 +15,7 @@ import sys
 from datetime import datetime
 from functools import lru_cache
 from logging.handlers import RotatingFileHandler
+from subprocess import CompletedProcess
 from types import TracebackType
 from typing import Any, Optional, Tuple, Type
 
@@ -71,10 +72,11 @@ def setup_log() -> None:
     logging.captureWarnings(True)
 
 
-def get_file_handler(file_path: str, default: str = None) -> Optional[str]:
+def get_file_handler(file_path: str) -> str:
     mtype, _ = mimetypes.guess_type(file_path)
     if not mtype:
-        return default
+        return config.DEFAULT_OPEN.format(file_path=shlex.quote(file_path))
+
     caps = mailcap.getcaps()
     handler, view = mailcap.findmatch(caps, mtype, filename=file_path)
     if not handler:
@@ -181,17 +183,25 @@ class suspend:
     def __init__(self, view: Any) -> None:
         self.view = view
 
-    def call(self, cmd: str) -> None:
-        subprocess.call(cmd, shell=True)
+    def call(self, cmd: str) -> CompletedProcess:
+        return subprocess.run(cmd, shell=True, stderr=subprocess.PIPE)
 
     def run_with_input(self, cmd: str, text: str) -> None:
         subprocess.run(cmd, universal_newlines=True, input=text, shell=True)
 
-    def open_file(self, file_path: str) -> None:
-        cmd = get_file_handler(file_path)
-        if not cmd:
-            return
-        self.call(cmd)
+    def open_file(self, file_path: str, cmd: str = None) -> str:
+        if cmd:
+            try:
+                cmd = cmd % shlex.quote(file_path)
+            except TypeError:
+                return "command should contain <%s> which will be replaced by file path"
+        else:
+            cmd = get_file_handler(file_path)
+
+        proc = self.call(cmd)
+        if proc.returncode:
+            return proc.stderr.decode()
+        return ""
 
     def __enter__(self) -> "suspend":
         for view in (self.view.chats, self.view.msgs, self.view.status):

tg/views.py

@@ -102,7 +102,7 @@ class StatusView:
         self.win.clear()
         if not msg:
             return
-        self.win.addstr(0, 0, msg[: self.w])
+        self.win.addstr(0, 0, msg.replace("\n", " ")[: self.w])
         self._refresh()
 
     def get_input(self, msg: str = "") -> str: