From 502605067f48b012b7284b3d18b9bf8a88c37825 Mon Sep 17 00:00:00 2001
From: Thomas Hooge <thomas@hoogi.de>
Date: Tue, 9 Apr 2024 12:39:16 +0200
Subject: [PATCH] Preparation for native gui development

---
 README          |  2 +-
 yms/__init.py__ |  1 +
 yms/database.py | 32 ++++++++++++++++++++
 ymsgui.py       | 77 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 111 insertions(+), 1 deletion(-)
 create mode 100644 yms/__init.py__
 create mode 100644 yms/database.py
 create mode 100755 ymsgui.py

diff --git a/README b/README
index 62aa829..26001cc 100644
--- a/README
+++ b/README
@@ -1,3 +1,3 @@
-YMS - Yacht Managemet System
+YMS - Yacht Management System
 Prototype
 
diff --git a/yms/__init.py__ b/yms/__init.py__
new file mode 100644
index 0000000..e6d10ed
--- /dev/null
+++ b/yms/__init.py__
@@ -0,0 +1 @@
+__doc__ = """YMS"""
diff --git a/yms/database.py b/yms/database.py
new file mode 100644
index 0000000..a445dac
--- /dev/null
+++ b/yms/database.py
@@ -0,0 +1,32 @@
+import MySQLdb
+
+class Database():
+
+    def __init__(self, hostname, dbname):
+        self.hostname = hostname
+        self.schema = dbname
+        self.conn = None
+        self.cur = None
+        self.dcur = None
+
+    def connect(self, dbuser, dbpass):
+        if self.conn:
+            return True
+        MySQLdb.paramstyle = 'pyformat'
+        try:
+            self.conn = MySQLdb.connect(host=self.hostname, db=self.schema,
+                user=dbuser, passwd=dbpass, charset='utf8')
+        except MySQLdb.Error as e:
+            print(e)
+            return False
+        self.cur = self.conn.cursor()
+        self.dcur = self.conn.cursor(MySQLdb.cursors.DictCursor)
+        return True
+
+    def disconnect(self):
+        self.cur.close()
+        self.dcur.close()
+        self.conn.close()
+
+    def is_connected(self):
+        return self.conn.open
diff --git a/ymsgui.py b/ymsgui.py
new file mode 100755
index 0000000..b0c2eeb
--- /dev/null
+++ b/ymsgui.py
@@ -0,0 +1,77 @@
+#!/usr/bin/python3
+
+"""
+
+Configuration file located at ~/.config/ymsgui.conf:
+  [DB]
+  host = localhost
+  db = yms
+  user = yms
+  pass = topsecret
+
+"""
+
+import os
+import sys
+import locale
+import configparser
+
+import gi
+gi.require_version("Gtk", "3.0")
+from gi.repository import GLib, Gtk
+
+from yms import database
+
+cfg = {
+    'cfgfile': '~/.config/ymsgui.conf',
+    'host': 'localhost',
+    'db': 'yms',
+    'user': 'yms'
+}
+
+class Frontend(Gtk.Window):
+
+    def __init__(self):
+        super().__init__()
+        self.connect("destroy", self.on_destroy)
+
+    def run(self):
+        self.show_all()
+        Gtk.main()
+
+    def on_destroy(self, widget, data=None):
+        Gtk.main_quit()
+
+def messagebox(messagetext, symbol=None, title=None, parent=None):
+    if not symbol:
+        symbol = Gtk.MessageType.INFO
+    if parent:
+        symbol |= Gtk.DIALOG_DESTROY_WITH_PARENT
+    md = Gtk.MessageDialog(parent=parent, flags=0, message_type=symbol, buttons=Gtk.ButtonsType.CLOSE)
+    md.set_markup(messagetext)
+    if title:
+        md.set_title(title)
+    if not parent:
+        md.set_position(Gtk.WindowPosition.CENTER)
+    md.run()
+    md.destroy()
+
+if __name__ == "__main__":
+    locale.setlocale(locale.LC_ALL, '')
+    config = configparser.ConfigParser()
+    if not config.read(os.path.expanduser(cfg['cfgfile'])):
+        messagebox("Configuration file not found", title="YMS")
+    else:
+        cfg['host'] = config.get('DB', 'host')
+        cfg['db'] = config.get('DB', 'db')
+        cfg['user'] = config.get('DB', 'user')
+        cfg['pass'] = config.get('DB', 'pass')
+        db = database.Database(cfg['host'], cfg['db'])
+        if db.connect(cfg['user'], cfg['pass']):
+            app = Frontend()
+            app.run()
+            db.disconnect()
+        else:
+            messagebox("Database connection cannot be established", title="YMS")
+
+# Another fine product of the sirius cybernetics corporation