added a behavior when there are multiple pi that are undefined or master

source/behaviors/roles/MasterRole.py

@@ -28,7 +28,7 @@ class MasterRole(base.BaseActiveRole):
 
         # prepare the audio file that will be streamed
         # TODO(Faraphel): use another audio source
-        self.audio = pydub.AudioSegment.from_file("./assets/Queen - Another One Bites the Dust.mp3")
+        self.audio = pydub.AudioSegment.from_file("./assets/Roundabout 2008 Remaster.mp3")
         self.play_time = datetime.now()
 
         # calculate the number of bytes per milliseconds in the audio
@@ -45,9 +45,18 @@ class MasterRole(base.BaseActiveRole):
 
 
     def handle(self) -> None:
-        # TODO(Faraphel): communicate with chrony to add peers and enable server mode ?
-        # TODO(Faraphel): share the secret key generated with the other *allowed* peers ! How to select them ? A file ?
-        # TODO(Faraphel): check if another server is emitting sound in the network. Return to undefined if yes
+        # get all the master peers in the network
+        master_peers = {
+            address: peer
+            for (address, peer) in self.manager.peer.peers.items()
+            if peer.master
+        }
+        # if there is more than one master, return to undefined
+        if len(master_peers) > 1:
+            # declare ourselves as the master of the network
+            from source.behaviors.roles import UndefinedRole
+            self.manager.role.current = UndefinedRole(self.manager)
+            return
 
         # get the current chunk (loop indefinitely)
         chunk = self.chunks[self.chunk_count % len(self.chunks)]

source/behaviors/roles/UndefinedRole.py

@@ -56,5 +56,20 @@ class UndefinedRole(base.BaseRole):
 
         # SCENARIO 3 - network with no master
 
-        # TODO(Faraphel): elect the machine with the lowest ping in the network
-        raise NotImplementedError("Not implemented: elect the machine with the lowest ping as a master.")
+        # get the peer with the highest public key
+        master_address, master_peer = max(
+            self.manager.peer.peers.items(),
+            key=lambda peer: peer[1].public_key
+        )
+
+        # if we are the master
+        if self.manager.communication.is_address_local(master_address):
+            # declare ourselves as the master of the network
+            from source.behaviors.roles import MasterRole
+            self.manager.role.current = MasterRole(self.manager)
+
+        # else become a slave
+        else:
+            # declare ourselves as a slave of the network
+            from source.behaviors.roles import SlaveRole
+            self.manager.role.current = SlaveRole(self.manager, master_address)