Adding hook feature

bin/terminal_velocity

@@ -7,6 +7,7 @@ import os
 import logging
 import logging.handlers
 import sys
+import json
 
 import terminal_velocity.urwid_ui as urwid_ui
 
@@ -60,6 +61,11 @@ the default default will be used"""
         help="the filename extensions to recognize in the notes dir, a "
             "comma-separated list (default: %(default)s)")
 
+    parser.add_argument("--hooks", dest="hooks", action="store",
+        default=defaults.get("hooks", "{}"),
+        help="the scripts which get executed when events occure such has \
+        saving notes (default: %(default)s)")
+
     parser.add_argument("-d", "--debug", dest="debug", action="store_true",
         default=defaults.get("debug", False),
         help="debug logging on or off (default: off)")
@@ -78,6 +84,9 @@ the default default will be used"""
 
     args = parser.parse_args()
 
+
+    args.hooks = json.loads(args.hooks)
+
     extensions = []
     for extension in args.extensions.split(","):
         extensions.append(extension.strip())
@@ -107,7 +116,8 @@ the default default will be used"""
 
     try:
         urwid_ui.launch(notes_dir=args.notes_dir, editor=args.editor,
-                extension=args.extension, extensions=args.extensions)
+                extension=args.extension, extensions=args.extensions,
+                hooks=args.hooks)
     except KeyboardInterrupt:
         # Silence KeyboardInterrupt tracebacks on ctrl-c.
         sys.exit()

terminal_velocity/urwid_ui.py

@@ -5,6 +5,7 @@
 """
 import subprocess
 import logging
+import os
 logger = logging.getLogger(__name__)
 
 import urwid
@@ -238,8 +239,7 @@ def mouse_event(self, size, event, button, col, row, focus):
 class MainFrame(urwid.Frame):
     """The topmost urwid widget."""
 
-    def __init__(self, notes_dir, editor, extension, extensions):
-
+    def __init__(self, notes_dir, editor, extension, extensions, hooks):
         self.editor = editor
         self.notebook = notebook.PlainTextNoteBook(notes_dir, extension,
                 extensions)
@@ -253,6 +253,8 @@ def __init__(self, notes_dir, editor, extension, extensions):
 
         self._selected_note = None
 
+        self.hooks = hooks
+
         self.search_box = AutocompleteWidget(wrap="clip")
         self.list_box = NoteFilterListBox(on_changed=self.on_list_box_changed)
 
@@ -306,6 +308,15 @@ def quit(self):
 
         raise urwid.ExitMainLoop()
 
+    def execute_hook(self, hook, param):
+        """Execute the defined hook
+
+        For the time being only the post hook has been tested
+
+        """
+        if hook in self.hooks != "" and os.path.isfile(self.hooks[hook]):
+           subprocess.call([self.hooks[hook], param])
+
     def keypress(self, size, key):
 
         maxcol, maxrow = size
@@ -325,17 +336,20 @@ def keypress(self, size, key):
         elif key in ["enter"]:
             if self.selected_note:
                 system(self.editor, [self.selected_note.abspath], self.loop)
+                self.execute_hook("post", self.selected_note.abspath)
             else:
                 if self.search_box.edit_text:
                     try:
                         note = self.notebook.add_new(self.search_box.edit_text)
                         system(self.editor, [note.abspath], self.loop)
+                        self.execute_hook("post", note.abspath)
                     except notebook.NoteAlreadyExistsError:
                         # Try to open the existing note instead.
-                        system(self.editor,
-                            [self.search_box.edit_text +
+                        system(self.editor, [self.search_box.edit_text +
                                 self.notebook.extension],
                             self.loop)
+                        self.execute_hook("post", self.search_box.edit_text +
+                                self.notebook.extension)
                     except notebook.InvalidNoteTitleError:
                         # TODO: Display error message to user.
                         pass
@@ -435,10 +449,10 @@ def on_list_box_changed(self, note):
         self.selected_note = note
 
 
-def launch(notes_dir, editor, extension, extensions):
+def launch(notes_dir, editor, extension, extensions, hooks):
     """Launch the user interface."""
 
-    frame = MainFrame(notes_dir, editor, extension, extensions)
+    frame = MainFrame(notes_dir, editor, extension, extensions, hooks)
     loop = urwid.MainLoop(frame, palette)
     frame.loop = loop
     loop.run()