From 01e0af6fcb20ebe553ed8af13d4f43fede28c127 Mon Sep 17 00:00:00 2001
From: Rik Veenboer <rik.veenboer@gmail.com>
Date: Sat, 20 Aug 2016 11:56:48 +0100
Subject: [PATCH] add stubs for pluggable implementations

---
 dynamic.py                 | 27 +++++++++++++++++++++++++++
 implementation/__init__.py | 13 +++++++++++++
 implementation/local.py    |  5 +++++
 implementation/remote.py   |  5 +++++
 4 files changed, 50 insertions(+)
 create mode 100644 dynamic.py
 create mode 100644 implementation/__init__.py
 create mode 100644 implementation/local.py
 create mode 100644 implementation/remote.py

diff --git a/dynamic.py b/dynamic.py
new file mode 100644
index 0000000..bbc7cd3
--- /dev/null
+++ b/dynamic.py
@@ -0,0 +1,27 @@
+import sys
+import importlib
+import configparser
+
+from implementation import *
+from implementation import ibuddy
+
+# Read chosen implementation from config
+try:
+    config = configparser.ConfigParser()
+    config.read('config.ini')
+    implementation = config.get('general', 'implementation')
+except:
+    sys.exit('[error] Failed to read config file!')
+    
+# Load implementation
+implementations = [subclass.__name__ for subclass in ibuddy.__subclasses__()]
+try:
+    if implementation in implementations:
+        ibuddy = getattr(globals()[implementation], implementation)()
+    else:
+        raise
+except:
+    sys.exit('[error] Failed to load implementation!')
+
+# Fun!
+ibuddy.test()
\ No newline at end of file
diff --git a/implementation/__init__.py b/implementation/__init__.py
new file mode 100644
index 0000000..99aa988
--- /dev/null
+++ b/implementation/__init__.py
@@ -0,0 +1,13 @@
+import os
+import glob
+import abc
+
+modules = glob.glob(os.path.dirname(__file__) + '/*.py')
+__all__ = [os.path.basename(f)[:-3] for f in modules]
+
+class ibuddy:
+    __metaclass__ = abc.ABCMeta
+
+    @abc.abstractmethod
+    def test(self):
+        return
\ No newline at end of file
diff --git a/implementation/local.py b/implementation/local.py
new file mode 100644
index 0000000..e18a690
--- /dev/null
+++ b/implementation/local.py
@@ -0,0 +1,5 @@
+from . import ibuddy
+
+class local(ibuddy):
+    def test(self):
+        print('test local')
\ No newline at end of file
diff --git a/implementation/remote.py b/implementation/remote.py
new file mode 100644
index 0000000..5b2cef7
--- /dev/null
+++ b/implementation/remote.py
@@ -0,0 +1,5 @@
+from . import ibuddy
+
+class remote(ibuddy):
+    def test(self):
+        print('test remote')
\ No newline at end of file