feat: a lot of stuff

overlays/pppdf/default.nix

@@ -0,0 +1,26 @@
+{ pkgs, lib, buildPythonApplication, python3Packages }:
+buildPythonApplication {
+  pname = "pppdf";
+  version = "1.0.0";
+  src = ./pppdf.py;
+
+  nativeBuildInputs = [
+    pkgs.wrapGAppsHook
+    pkgs.gobject-introspection
+  ];
+
+  propagatedBuildInputs = with python3Packages; [ pkgs.gtk3 pygobject3 notify2 pikepdf ];
+
+  dontUnpack = true;
+  format = "other";
+
+  installPhase = ''
+    install -D $src $out/bin/pppdf
+  '';
+
+  meta = with lib; {
+    description = "PDF Postprocessor";
+    license = licenses.mit;
+  };
+
+}

overlays/pppdf/pppdf.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python
+
+import sys
+import math
+import os
+
+try:
+    import notify2
+except:
+    print('Missing library: notify2')
+    exit(1)
+
+notify2.init('pppdf')
+# notify2.Notification('pppdf', f'Working dir: {os.getcwd()}').show()
+
+try:
+    import pikepdf
+except:
+    notify2.Notification('pppdf', 'Missing library: pikepdf').show()
+    print('Missing library: pikepdf')
+    exit(1)
+
+try:
+    import gi
+    gi.require_version("Gtk", "3.0")
+    from gi.repository import Gtk
+except:
+    notify2.Notification('pppdf', 'Missing library: gi').show()
+    print('Missing library: gi')
+    exit(1)
+
+if len(sys.argv) != 5:
+    notify2.Notification('pppdf', 'Error: invalid arguments.').show()
+    print('Error: invalid arguments.')
+    print(f'Usage: {sys.argv[0]} <mime> <keep_original=true|false> <file> <mode=zip|rzip>')
+    exit(1)
+
+mime = sys.argv[1]
+keep = sys.argv[2]
+source = sys.argv[3]
+mode = sys.argv[4]
+
+if mime != 'application/pdf':
+    notify2.Notification('pppdf', 'Error: Only support for pdf.').show()
+    print('Error: Only support for pdf.')
+    exit(1)
+
+
+def pppdf_zip():
+    try:
+        with pikepdf.open(source) as pdf:
+
+            target = pikepdf.Pdf.new()
+
+            n = len(pdf.pages)
+            if mode == "zip":
+                pattern = [i // 2 if i % 2 == 0 else math.ceil(n / 2) + i // 2 for i in range(n)]
+            else:
+                pattern = [i // 2 if i % 2 == 0 else n - (i // 2) - 1 for i in range(n)]
+            print(pattern)
+            for i in pattern:
+                target.pages.append(pdf.pages[i])
+
+            if keep != "false":
+                pdf.save(source + ".orig")
+            target.save(source)
+            notify2.Notification('pppdf', f'Success: {source}').show()
+    except Exception as error:
+        notify2.Notification('pppdf', f'Error: {error}').show()
+
+
+
+class Dialog(Gtk.Window):
+    def __init__(self):
+        Gtk.Window.__init__(self, title="pppdf")
+
+        self.set_border_width(6)
+        label = Gtk.Label(label=f"Do you want to zip {source}?")
+
+        btn_cancel = Gtk.Button(label="Cancel")
+        btn_ok = Gtk.Button(label="Ok")
+        btn_cancel.connect("clicked", self.on_btn_cancel_clicked)
+        btn_ok.connect("clicked", self.on_btn_ok_clicked)
+
+        buttons = Gtk.Box(spacing=6)
+        buttons.pack_start(btn_cancel, True, True, 0)
+        buttons.pack_start(btn_ok, True, True, 0)
+
+        vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6)
+
+        vbox.pack_start(label, True, True, 0)
+        vbox.pack_start(buttons, True, True, 0)
+
+        self.add(vbox)
+
+    def on_btn_cancel_clicked(self, widget):
+        Gtk.main_quit()
+
+    def on_btn_ok_clicked(self, widget):
+        pppdf_zip()
+        Gtk.main_quit()
+
+win = Dialog()
+win.connect("destroy", Gtk.main_quit)
+win.show_all()
+Gtk.main()
+