The Plumbing now allows for the service to provide it's own function_choice when it returns a result. Separetly, a new type_checker wrapper is now available for use. And finally, the config model now passes around the same instance as a singleton to avoid new file operations to just read

core/controllers/ProfileController.py

@@ -61,7 +61,7 @@ class ProfileController:
         connection_observer: ConnectionObserver = None,
         ticket_observer: TicketObserver = None,
         max_resolution: Optional[str] = None
-        ):
+        ) -> Result:
 
         from core.controllers.ConnectionController import ConnectionController
 
@@ -113,6 +113,7 @@ class ProfileController:
                 profile_observer.notify('enabled', profile)
 
             ApplicationController.launch(application_version, profile, port_number, asynchronous=asynchronous, profile_observer=profile_observer, ticket_observer=ticket_observer, connection_observer=connection_observer)
+            return Result(valid=True)
 
         # ============================================================================
         # SYSTEMWIDE
@@ -123,6 +124,7 @@ class ProfileController:
                 if connection_result.valid:
                     if profile_observer is not None:
                         profile_observer.notify('enabled', profile)
+                        return Result(valid=True)
                 else:
                     logger.error(f"Couldn't enable the profile: {connection_result.error_type}")
                     error_msg = connection_result.message

core/infrastructure/plumbing.py

@@ -56,7 +56,10 @@ class ThreadPlumbing:
             if not isinstance(result, Result):
                 result = convert_to_result(result)
             if not result.valid:
-                result.function_choice = resolve_prescription(result, self.ENUM_MAP, *self.args, **self.kwargs)
+                if not result.function_choice:
+                    result.function_choice = resolve_prescription(result, self.ENUM_MAP, *self.args, **self.kwargs)
+                else:
+                    logger.info("Using the pre-existing function choice for this error.")
         except Exception as e:
             error_msg = f"There was an error: {str(e)}"
             # notify(error_msg)

core/models/Configuration.py

@@ -8,17 +8,23 @@ from enum import Enum
 from pydantic import BaseModel, field_serializer, field_validator, ConfigDict
 from datetime import datetime
 from zoneinfo import ZoneInfo
-from typing import Optional, Self
+from typing import Optional, Self, ClassVar
 import json
 import os
 import sys
 
-
 class ConnectionChoice(str, Enum):
     TOR = "tor"
     SYSTEM = "system"
 
+
 class Configuration(BaseModel):
+    model_config = ConfigDict(
+        extra='ignore',
+        exclude_none=True
+    )
+
+    _instance: ClassVar[Optional[Self]] = None
     connection: Optional[ConnectionChoice] = None
     auto_sync_enabled: Optional[bool] = None
     endpoint_verification_enabled: Optional[bool] = False
@@ -28,10 +34,7 @@ class Configuration(BaseModel):
     did_sudo_setup: Optional[bool] = False
     singbox: Optional[str] = None
 
-    model_config = ConfigDict(
-        extra='ignore',  # Ignore unknown fields in JSON
-        exclude_none=True  # Don't serialize None values
-    )
+
 
     @field_validator('last_synced_at', mode='before')
     @classmethod
@@ -47,9 +50,12 @@ class Configuration(BaseModel):
             return value.isoformat().replace('+00:00', 'Z')  # +00:00 → Z for JSON
         return None
 
+    @classmethod
+    def get(cls) -> Optional[Self]:
+        # Return the cached instance if it exists
+        if cls._instance is not None:
+            return cls._instance
 
-    @staticmethod
-    def get():
         try:
             with open(f'{Constants.HV_CONFIG_HOME}/config.json', 'r') as f:
                 config_file_contents = f.read()
@@ -61,18 +67,41 @@ class Configuration(BaseModel):
         except ValueError:
             sys.exit(1)
 
-        return Configuration(**configuration_dict)  # Pydantic validates on init
+        # Create the instance and cache it before returning
+        cls._instance = cls(**configuration_dict)
+        return cls._instance
 
-
-    def save(self: Self):
+    def save(self) -> None:
+        # model_dump_json reflects the current state of this specific instance
         config_file_contents = f'{self.model_dump_json(indent=4)}\n'
-        os.makedirs(Constants.HV_CONFIG_HOME, exist_ok=True)
+        os.makedirs(Constants.HOME, exist_ok=True)
         
         config_file_path = f'{Constants.HV_CONFIG_HOME}/config.json'
         write_atomically(config_file_path, config_file_contents)
 
 
+def get_setting(looking_for: str):
+    # Use the singleton getter
+    config = Configuration.get()
+    
+    if not config:
+        logger.error(f"[CONFIG] Can't load the entire config")
+        return None
+
+    # getattr because Pydantic models are objects, not dicts
+    result = getattr(config, looking_for, None)
+    
+    if result is None:
+        logger.error(f"[CONFIG] What you want isn't in the config: {looking_for}")
+        return None
+
+    return result
+
+
 def read_config():
+    """
+    Returns it as a dict, not as a model.
+    """
     try:
         config_file_contents = open(f'{Constants.HV_CONFIG_HOME}/config.json', 'r').read()
     except FileNotFoundError:
@@ -84,17 +113,3 @@ def read_config():
         logger.error(f"[CONFIG] Can't load JSON config")
     
     return configuration
-
-def get_setting(looking_for):
-    config = read_config()
-    if not config:
-        logger.error(f"[CONFIG] Can't load the entire config")
-        return None
-
-    if looking_for not in config:
-        logger.error(f"[CONFIG] What you want isn't in the config")
-        return None
- 
-    result = config[looking_for]
-
-    return result

core/models/Result.py

@@ -35,6 +35,7 @@ class ResultError(Enum):
     TIMEOUT = "timeout"
     INVALID_API_REPLY = "invalid_api_reply"
     ENCRYPTION = "encryption"
+    ENDPOINT_VERIFICATION = "endpoint_verification"
     LEAK_ISSUE = "leak_issue"
     NEED_SYNC = "need_sync"
     WRONG_LOCATION = "wrong_location"
@@ -42,6 +43,8 @@ class ResultError(Enum):
     UNPAID = "unpaid"
     MTU = "mtu"
     ACTIVE_BILLING = "active_billing"
+    STATE_CONFLICT = "state_conflict"
+    TOR_NEEDED = "tor_needed"
     NAVIGATE_TO = "navigate_to"
     UNKNOWN = "unknown"
 

core/utils/confirm_preqs.py

@@ -0,0 +1,14 @@
+from core.models.Result import Result, ResultError
+
+from typing import Optional
+
+def confirm_prereqs(PRE_REQS: list, allow_false: Optional[bool] = False) -> Result:
+    for each_prereq in PRE_REQS:
+        if allow_false:
+            if each_prereq == None:
+                return Result(valid=False, error_type=ResultError.INVALID_INPUT, message=f"You are missing {each_prereq}")
+        else:
+            if not each_prereq:
+                return Result(valid=False, error_type=ResultError.INVALID_INPUT, message=f"You are missing {each_prereq}")
+    return Result(valid=True)
+

core/utils/type_checker.py

@@ -0,0 +1,43 @@
+from core.models.Result import Result
+
+import inspect
+from functools import wraps
+from typing import Any
+
+def type_checker(func):
+    """
+    Type check wrapper.
+    This type checks individual functions it's put on, and returns a Result object on failure.
+    """
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        # 1. Introspect the wrapped function
+        sig = inspect.signature(func)
+        
+        try:
+            # Bind the provided args/kwargs to the function's signature
+            bound_args = sig.bind(*args, **kwargs)
+            bound_args.apply_defaults()
+        except TypeError as e:
+            # This handles cases where the wrong number of arguments are passed
+            return Result(valid=False, error_type=ResultError.INVALID_INPUT, message=str(e))
+
+        # 2. Perform type validation
+        for name, value in bound_args.arguments.items():
+            expected_type = sig.parameters[name].annotation
+            
+            # Skip parameters that don't have a type hint
+            if expected_type is inspect.Parameter.empty:
+                continue
+            
+            if not isinstance(value, expected_type):
+                return Result(
+                    valid=False,
+                    error_type=ResultError.INVALID_INPUT,
+                    message=f"Argument '{name}' must be {expected_type.__name__}, got type {type(value).__name__}"
+                )
+
+        # 3. If all checks pass, call the original function
+        return func(*args, **kwargs)
+        
+    return wrapper