CC-5990, CC-5991 - Python cleanup, removed need for /usr/lib/airtime

python_apps/media-monitor/mm2/media/saas/airtimeinstance.py

@@ -0,0 +1,73 @@
+import os
+from os.path import join, basename, dirname
+
+from ..monitor.exceptions import NoConfigFile
+from ..monitor.pure import LazyProperty
+from ..monitor.config import MMConfig
+from ..monitor.owners import Owner
+from ..monitor.events import EventRegistry
+from ..monitor.listeners import FileMediator
+from api_clients.api_client import AirtimeApiClient
+
+# poor man's phantom types...
+class SignalString(str): pass
+
+class AirtimeInstance(object):
+    """ AirtimeInstance is a class that abstracts away every airtime
+    instance by providing all the necessary objects required to interact
+    with the instance. ApiClient, configs, root_directory """
+
+    @classmethod
+    def root_make(cls, name, root):
+        cfg = {
+                'api_client' : join(root, 'etc/airtime/api_client.cfg'),
+                'media_monitor' : join(root, 'etc/airtime/airtime.conf'),
+        }
+        return cls(name, root, cfg)
+
+    def __init__(self,name, root_path, config_paths):
+        """ name is an internal name only """
+        for cfg in ['api_client','media_monitor']:
+            if cfg not in config_paths: raise NoConfigFile(config_paths)
+            elif not os.path.exists(config_paths[cfg]):
+                raise NoConfigFile(config_paths[cfg])
+        self.name         = name
+        self.config_paths = config_paths
+        self.root_path    = root_path
+
+    def signal(self, sig):
+        if isinstance(sig, SignalString): return sig
+        else: return SignalString("%s_%s" % (self.name, sig))
+
+    def touch_file_path(self):
+        """ Get the path of the touch file for every instance """
+        touch_base_path = self.mm_config['media-monitor']['index_path']
+        touch_base_name = basename(touch_base_path)
+        new_base_name   = self.name + touch_base_name
+        return join(dirname(touch_base_path), new_base_name)
+
+
+    def __str__(self):
+        return "%s,%s(%s)" % (self.name, self.root_path, self.config_paths)
+
+    @LazyProperty
+    def api_client(self):
+        return AirtimeApiClient(config_path=self.config_paths['api_client'])
+
+    @LazyProperty
+    def mm_config(self):
+        return MMConfig(self.config_paths['media_monitor'])
+
+    # I'm well aware that I'm using the service locator pattern
+    # instead of normal constructor injection as I should be.
+    # It's recommended to rewrite this using proper constructor injection
+
+    @LazyProperty
+    def owner(self): return Owner()
+
+    @LazyProperty
+    def event_registry(self): return EventRegistry()
+
+    @LazyProperty
+    def file_mediator(self): return FileMediator()
+