break config module apart

owrx/config/migration.py

@@ -0,0 +1,36 @@
+from abc import ABC, abstractmethod
+
+
+class ConfigMigrator(ABC):
+    @abstractmethod
+    def migrate(self, config):
+        pass
+
+    def renameKey(self, config, old, new):
+        if old in config and new not in config:
+            config[new] = config[old]
+            del config[old]
+
+
+class ConfigMigratorVersion1(ConfigMigrator):
+    def migrate(self, config):
+        if "receiver_gps" in config:
+            gps = config["receiver_gps"]
+            config["receiver_gps"] = {"lat": gps[0], "lon": gps[1]}
+
+        if "waterfall_auto_level_margin" in config:
+            levels = config["waterfall_auto_level_margin"]
+            config["waterfall_auto_level_margin"] = {"min": levels[0], "max": levels[1]}
+
+        self.renameKey(config, "wsjt_queue_workers", "decoding_queue_workers")
+        self.renameKey(config, "wsjt_queue_length", "decoding_queue_length")
+
+        config["version"] = 2
+        return config
+
+
+class ConfigMigratorVersion2(ConfigMigrator):
+    def migrate(self, config):
+        if "waterfall_colors" in config and any(v > 0xFFFFFF for v in config["waterfall_colors"]):
+            config["waterfall_colors"] = [v >> 8 for v in config["waterfall_colors"]]
+        return config