[FEATURE] Subscription nesting (#747)

Closes Feature Request: https://github.com/jmbannon/ytdl-sub/issues/743

Subscriptions support using presets as keys, and using keys to set override variables as values.
For example:

```
tv_show:
  only_recent:
    [News]:
      "Breaking News": "https://www.youtube.com/@SomeBreakingNews"

  [Tech]:
    "Two Minute Papers": "https://www.youtube.com/@TwoMinutePapers"
```
Will create two subscriptions named "Breaking News" and "Two Minute Papers", equivalent to:

```
"Breaking News":
  preset:
    - "tv_show"
    - "only_recent"

  overrides:
    subscription_indent_1: "News"
    subscription_name: "Breaking News"
    subscription_value: "https://www.youtube.com/@SomeBreakingNews"

"Two Minute Papers":
  preset:
    - "tv_show"

  overrides:
    subscription_indent_1: "Tech"
    subscription_name: "Two Minute Papers"     subscription_value: "https://www.youtube.com/@TwoMinutePapers"
```

You can provide as many parent presets in the form of keys, and subscription indents as ``[keys]``.
This can drastically simplify subscription definitions by setting things you want configurable like so in your
parent preset:

```
presets:
  tv_show_name:
    overrides:
      tv_show_name: "{subscription_name}"
      url: "{subscription_value}"
      genre: "{subscription_indent_1}"
```

NOTE!!!
Changing your subscription name from 'legacy' subscriptions will need their download archive file migrated to a new name. A future update will assist in this migration process. Either wait until then or, if you consider yourself a ytdl-sub expert, keep a backup of your subscription file before migrating.

docs/config.rst

@@ -29,7 +29,7 @@ and subscriptions.
 .. autoclass:: ytdl_sub.config.config_validator.ConfigOptions()
   :members:
   :member-order: bysource
-  :exclude-members: persist_logs, experimental
+  :exclude-members: subscription_value, persist_logs, experimental
 
 persist_logs
 """"""""""""
@@ -299,8 +299,66 @@ custom variables: ``{output_directory}``, ``{playlist_name}``, and ``{url}``. Th
 the `parent preset`_ to ``playlist_preset_ex``, and must define the variables ``{playlist_name}``
 and ``{url}`` since the preset did not.
 
+.. _beautifying subscriptions:
+
+Beautifying Subscriptions
+^^^^^^^^^^^^^^^^^^^^^^^^^
+Subscriptions support using presets as keys, and using keys to set override variables as values.
+For example:
+
+.. code-block:: yaml
+  :caption: subscription.yaml
+
+   tv_show:
+     only_recent:
+       [News]:
+         "Breaking News": "https://www.youtube.com/@SomeBreakingNews"
+
+     [Tech]:
+       "Two Minute Papers": "https://www.youtube.com/@TwoMinutePapers"
+
+Will create two subscriptions named "Breaking News" and "Two Minute Papers", equivalent to:
+
+.. code-block:: yaml
+
+  "Breaking News":
+    preset:
+      - "tv_show"
+      - "only_recent"
+
+    overrides:
+      subscription_indent_1: "News"
+      subscription_name: "Breaking News"
+      subscription_value: "https://www.youtube.com/@SomeBreakingNews"
+
+  "Two Minute Papers":
+    preset:
+      - "tv_show"
+
+    overrides:
+      subscription_indent_1: "Tech"
+      subscription_name: "Two Minute Papers"
+      subscription_value: "https://www.youtube.com/@TwoMinutePapers"
+
+You can provide as many parent presets in the form of keys, and subscription indents as ``[keys]``.
+This can drastically simplify subscription definitions by setting things like so in your
+parent preset:
+
+.. code-block:: yaml
+
+  presets:
+    tv_show_name:
+      overrides:
+        tv_show_name: "{subscription_name}"
+        url: "{subscription_value}"
+        genre: "{subscription_indent_1}"
+
+.. _subscription value:
+
 File Preset
 ^^^^^^^^^^^
+NOTE: This is deprecated in favor of using the method in :ref:`beautifying subscriptions`.
+
 You can apply a preset to all subscriptions in the ``subscription.yaml`` file
 by using the file-wide ``__preset__``:
 
@@ -318,10 +376,11 @@ by using the file-wide ``__preset__``:
 This ``subscription.yaml`` is equivalent to the one above it because all
 subscriptions automatically set ``__preset__`` as a `parent preset`_.
 
-.. _subscription value:
 
 Subscription Value
 ^^^^^^^^^^^^^^^^^^^
+NOTE: This is deprecated in favor of using the method in :ref:`beautifying subscriptions`.
+
 With a clever config and use of ``__preset__``, your subscriptions can typically boil
 down to a name and url. You can set ``__value__`` to the name of an override variable,
 and use the override variable ``subscription_name`` to achieve one-liner subscriptions.

docs/deprecation_notices.rst

@@ -1,6 +1,14 @@
 Deprecation Notices
 ===================
 
+Oct 2023
+--------
+
+subscription preset and value
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The use of ``__value__`` will go away in Dec 2023 in favor of the method found in
+:ref:`beautifying subscriptions`. ``__preset__`` will still be supported for the time being.
+
 July 2023
 ---------
 

src/ytdl_sub/subscriptions/subscription.py

@@ -1,4 +1,5 @@
 import copy
+from typing import Any
 from typing import Dict
 from typing import List
 from typing import Optional
@@ -6,13 +7,17 @@ from typing import Optional
 from ytdl_sub.config.config_file import ConfigFile
 from ytdl_sub.config.preset import Preset
 from ytdl_sub.subscriptions.subscription_download import SubscriptionDownload
+from ytdl_sub.subscriptions.subscription_validators import SubscriptionValidator
 from ytdl_sub.utils.exceptions import ValidationException
+from ytdl_sub.utils.logger import Logger
 from ytdl_sub.utils.yaml import load_yaml
 from ytdl_sub.validators.validators import LiteralDictValidator
 
 FILE_PRESET_APPLY_KEY = "__preset__"
 FILE_SUBSCRIPTION_VALUE_KEY = "__value__"
 
+logger = Logger.get("subscription")
+
 
 class Subscription(SubscriptionDownload):
     @classmethod
@@ -68,15 +73,23 @@ class Subscription(SubscriptionDownload):
     def _maybe_get_subscription_value(
         cls, config: ConfigFile, subscription_dict: Dict
     ) -> Optional[str]:
+        subscription_value_key: Optional[str] = config.config_options.subscription_value
         if FILE_SUBSCRIPTION_VALUE_KEY in subscription_dict:
             if not isinstance(subscription_dict[FILE_SUBSCRIPTION_VALUE_KEY], str):
                 raise ValidationException(
                     f"Using {FILE_SUBSCRIPTION_VALUE_KEY} in a subscription"
                     f"must be a string that corresponds to an override variable"
                 )
-            return subscription_dict[FILE_SUBSCRIPTION_VALUE_KEY]
 
-        return config.config_options.subscription_value  # can be None
+            subscription_value_key = subscription_dict[FILE_SUBSCRIPTION_VALUE_KEY]
+
+        if subscription_value_key is not None:
+            logger.warning(
+                "Using %s in a subscription will eventually be deprecated in favor of writing "
+                "to the override variable `subscription_value`. Please update by Dec 2023.",
+                FILE_SUBSCRIPTION_VALUE_KEY,
+            )
+        return subscription_value_key
 
     @classmethod
     def from_file_path(cls, config: ConfigFile, subscription_path: str) -> List["Subscription"]:
@@ -121,39 +134,22 @@ class Subscription(SubscriptionDownload):
             config = copy.deepcopy(config)
             config.presets.dict[FILE_PRESET_APPLY_KEY] = file_preset.dict
 
-        for subscription_key, subscription_object in subscription_dict.items():
+        subscriptions_dict: Dict[str, Any] = {
+            key: obj
+            for key, obj in subscription_dict.items()
+            if key not in [FILE_PRESET_APPLY_KEY, FILE_SUBSCRIPTION_VALUE_KEY]
+        }
 
-            # Skip file preset or value
-            if subscription_key in [FILE_PRESET_APPLY_KEY, FILE_SUBSCRIPTION_VALUE_KEY]:
-                continue
-
-            # If the subscription obj is just a string, set it to the override variable
-            # defined in FILE_SUBSCRIPTION_VALUE_KEY
-            if isinstance(subscription_object, str) and file_subscription_value:
-                subscription_object = {"overrides": {file_subscription_value: subscription_object}}
-            elif isinstance(subscription_object, dict):
-                pass
-            elif isinstance(subscription_object, str) and not file_subscription_value:
-                raise ValidationException(
-                    f"Subscription {subscription_key} is a string, but the subscription value "
-                    f"is not set to an override variable"
-                )
-            else:
-                raise ValidationException(
-                    f"Subscription {subscription_key} should be in the form of a preset"
-                )
-
-            # If it has file_preset, inject it as a parent preset
-            if has_file_preset:
-                parent_preset = subscription_object.get("preset", [])
-                # Preset can be a single string
-                if isinstance(parent_preset, str):
-                    parent_preset = [parent_preset]
-
-                # If it's not a string or list, it will fail downstream
-                if isinstance(parent_preset, list):
-                    subscription_object["preset"] = parent_preset + [FILE_PRESET_APPLY_KEY]
+        subscriptions_dicts = SubscriptionValidator(
+            name="",
+            value=subscriptions_dict,
+            config=config,
+            presets=[FILE_PRESET_APPLY_KEY] if has_file_preset else [],
+            indent_overrides=[],
+            subscription_value=file_subscription_value,
+        ).subscription_dicts()
 
+        for subscription_key, subscription_object in subscriptions_dicts.items():
             subscriptions.append(
                 cls.from_dict(
                     config=config,

src/ytdl_sub/subscriptions/subscription_validators.py

@@ -0,0 +1,208 @@
+import copy
+from abc import ABC
+from abc import abstractmethod
+from typing import Dict
+from typing import List
+from typing import Optional
+
+from ytdl_sub.config.config_file import ConfigFile
+from ytdl_sub.config.preset_options import Overrides
+from ytdl_sub.validators.validators import DictValidator
+from ytdl_sub.validators.validators import StringListValidator
+from ytdl_sub.validators.validators import StringValidator
+from ytdl_sub.validators.validators import Validator
+
+
+def subscription_indent_variable_name(index: int) -> str:
+    """
+    Parameters
+    ----------
+    index
+        0th-based index
+
+    Returns
+    -------
+    subscription_index_i, where i is 1-based index
+    """
+    return f"subscription_indent_{index + 1}"
+
+
+def subscription_value_variable_name() -> str:
+    """
+    Returns
+    -------
+    The override variable name containing the subscription value if present
+    """
+    return "subscription_value"
+
+
+def maybe_indent_override_value(value: str) -> Optional[str]:
+    """
+    Returns
+    -------
+    Value if it is an overide [Value]. None otherwise.
+    """
+    if value.startswith("[") and value.endswith("]"):
+        return value[1:-1]
+    return None
+
+
+class SubscriptionOutput(Validator, ABC):
+    def __init__(self, name, value, presets: List[str], indent_overrides: List[str]):
+        super().__init__(name, value)
+        self._presets = copy.deepcopy(presets)
+        self._indent_overrides = copy.deepcopy(indent_overrides)
+
+    def _indent_overrides_dict(self) -> Dict[str, str]:
+        """
+        Returns
+        -------
+        indent overrides to merge with the preset dict's overrides
+        """
+        return {
+            subscription_indent_variable_name(i): self._indent_overrides[i]
+            for i in range(len(self._indent_overrides))
+        }
+
+    @abstractmethod
+    def subscription_dicts(self) -> Dict[str, Dict]:
+        """
+        Returns
+        -------
+        Subscriptions in the form of ``{ subscription_name: preset_dict }``
+        """
+
+
+class SubscriptionPresetDictValidator(SubscriptionOutput, DictValidator):
+    def __init__(self, name, value, presets: List[str], indent_overrides: List[str]):
+        super().__init__(name=name, value=value, presets=presets, indent_overrides=indent_overrides)
+
+        _ = self._validate_key_if_present(key="preset", validator=StringListValidator, default=[])
+        _ = self._validate_key_if_present(key="overrides", validator=Overrides, default={})
+
+    def subscription_dicts(self) -> Dict[str, Dict]:
+        output_dict = copy.deepcopy(self._dict)
+        parent_presets = output_dict.get("preset", [])
+
+        # Preset can be a single string
+        if isinstance(parent_presets, str):
+            parent_presets = [parent_presets]
+
+        output_dict["preset"] = parent_presets + self._presets
+        output_dict["overrides"] = dict(
+            output_dict.get("overrides", {}), **self._indent_overrides_dict()
+        )
+        return {self._leaf_name: output_dict}
+
+
+class SubscriptionValueValidator(SubscriptionOutput, StringValidator):
+    def __init__(
+        self,
+        name,
+        value,
+        config: ConfigFile,
+        presets: List[str],
+        indent_overrides: List[str],
+        subscription_value: Optional[str],
+    ):
+        super().__init__(name=name, value=value, presets=presets, indent_overrides=indent_overrides)
+
+        if self._leaf_name in config.presets.keys:
+            raise self._validation_exception(
+                f"{self._leaf_name} conflicts with an existing preset name and cannot be "
+                f"used as a subscription name"
+            )
+
+        if subscription_value is None:
+            raise self._validation_exception(
+                f"Subscription {self._leaf_name} is a string, but the subscription value "
+                f"is not set to an override variable"
+            )
+
+        self._subscription_value: str = subscription_value
+
+    def subscription_dicts(self) -> Dict[str, Dict]:
+        return {
+            self._leaf_name: {
+                "preset": self._presets,
+                "overrides": dict(
+                    {
+                        self._subscription_value: self.value,
+                        "subscription_value": self.value,
+                    },
+                    **self._indent_overrides_dict(),
+                ),
+            }
+        }
+
+
+class SubscriptionValidator(SubscriptionOutput):
+    """
+    Top-level subscription validator
+    """
+
+    def __init__(
+        self,
+        name,
+        value,
+        config: ConfigFile,
+        presets: List[str],
+        indent_overrides: List[str],
+        subscription_value: Optional[str],
+    ):
+        super().__init__(name=name, value=value, presets=presets, indent_overrides=indent_overrides)
+        self._children: List[SubscriptionOutput] = []
+
+        for key, obj in value.items():
+            obj_name = f"{name}.{key}" if name else key
+
+            if isinstance(obj, str):
+                self._children.append(
+                    SubscriptionValueValidator(
+                        name=obj_name,
+                        value=obj,
+                        config=config,
+                        presets=presets,
+                        indent_overrides=indent_overrides,
+                        subscription_value=subscription_value,
+                    )
+                )
+            elif isinstance(value, dict):
+                if key in config.presets.keys:
+                    self._children.append(
+                        SubscriptionValidator(
+                            name=obj_name,
+                            value=obj,
+                            config=config,
+                            presets=presets + [key],
+                            indent_overrides=indent_overrides,
+                            subscription_value=subscription_value,
+                        )
+                    )
+                elif override_value := maybe_indent_override_value(key):
+                    self._children.append(
+                        SubscriptionValidator(
+                            name=obj_name,
+                            value=obj,
+                            config=config,
+                            presets=presets,
+                            indent_overrides=indent_overrides + [override_value],
+                            subscription_value=subscription_value,
+                        )
+                    )
+                else:
+                    self._children.append(
+                        SubscriptionPresetDictValidator(
+                            name=obj_name,
+                            value=obj,
+                            presets=presets,
+                            indent_overrides=indent_overrides,
+                        )
+                    )
+
+    def subscription_dicts(self) -> Dict[str, Dict]:
+        subscription_dicts: Dict[str, Dict] = {}
+        for child in self._children:
+            subscription_dicts = dict(subscription_dicts, **child.subscription_dicts())
+
+        return subscription_dicts

src/ytdl_sub/validators/validators.py

@@ -93,6 +93,26 @@ class Validator(ABC):
         """
         return validation_exception(self._name, error_message, exception_class)
 
+    @final
+    @property
+    def _root_name(self) -> str:
+        """
+        Returns
+        -------
+        "first" from the first.element.of.the.name
+        """
+        return self._name.split(".")[0]
+
+    @final
+    @property
+    def _leaf_name(self) -> str:
+        """
+        Returns
+        -------
+        "first" from the first.element.of.the.name
+        """
+        return self._name.split(".")[-1]
+
 
 class ValueValidator(Validator, ABC, Generic[ValueT]):
     """
@@ -179,16 +199,6 @@ class DictValidator(Validator):
         super().__init__(name, value)
         self.__validator_dict: Dict[str, Validator] = {}
 
-    @final
-    @property
-    def _root_name(self) -> str:
-        """
-        Returns
-        -------
-        "first" from the first.element.of.the.name
-        """
-        return self._name.split(".")[0]
-
     @final
     @property
     def _dict(self) -> dict:

tests/unit/config/test_subscription.py

@@ -43,6 +43,8 @@ def preset_with_file_preset(youtube_video: Dict, output_options: Dict):
             "overrides": {
                 "test_file_subscription_value": "original",
                 "test_config_subscription_value": "original",
+                "subscription_indent_1": "original_1",
+                "subscription_indent_2": "original_2",
             },
         },
         "test_preset": {
@@ -75,6 +77,38 @@ def preset_with_subscription_file_value(preset_with_subscription_value: Dict):
     )
 
 
+@pytest.fixture
+def preset_with_subscription_value_nested_presets(preset_with_subscription_value: Dict):
+    return dict(
+        preset_with_subscription_value,
+        **{
+            "parent_preset_2": {
+                "parent_preset_1": {"test_2_1": "is_2_1_overwritten"},
+                "test_1": "is_1_overwritten",
+            }
+        },
+    )
+
+
+@pytest.fixture
+def preset_with_subscription_value_nested_presets_and_indent_variables(
+    preset_with_subscription_value: Dict,
+):
+    return dict(
+        preset_with_subscription_value,
+        **{
+            "parent_preset_2": {
+                "[INDENT_1]": {
+                    "parent_preset_1": {"test_2_1": "is_2_1_overwritten"},
+                    "[INDENT_2]": {
+                        "test_1": "is_1_overwritten",
+                    },
+                }
+            }
+        },
+    )
+
+
 def test_subscription_file_preset_applies(config_file: ConfigFile, preset_with_file_preset: Dict):
     with mock_load_yaml(preset_dict=preset_with_file_preset):
         subs = Subscription.from_file_path(config=config_file, subscription_path="mocked")
@@ -104,15 +138,12 @@ def test_subscription_file_value_applies(
 
     # Test __value__ worked correctly
     value_sub = subs[1]
+    overrides = value_sub.overrides.dict_with_format_strings
     assert value_sub.name == "test_value"
-    assert (
-        value_sub.overrides.dict_with_format_strings.get("test_file_subscription_value")
-        == "is_overwritten"
-    )
-    assert (
-        value_sub.overrides.dict_with_format_strings.get("test_config_subscription_value")
-        == "original"
-    )
+
+    assert overrides.get("test_file_subscription_value") == "is_overwritten"
+    assert overrides.get("test_file_subscription_value")
+    assert overrides.get("subscription_value") == "is_overwritten"
 
 
 def test_subscription_file_value_applies_sub_file_takes_precedence(
@@ -126,16 +157,11 @@ def test_subscription_file_value_applies_sub_file_takes_precedence(
     assert len(subs) == 2
 
     # Test __value__ worked correctly
-    value_sub = subs[1]
-    assert value_sub.name == "test_value"
-    assert (
-        value_sub.overrides.dict_with_format_strings.get("test_file_subscription_value")
-        == "is_overwritten"
-    )
-    assert (
-        value_sub.overrides.dict_with_format_strings.get("test_config_subscription_value")
-        == "original"
-    )
+    value_sub = subs[1].overrides.dict_with_format_strings
+    assert value_sub.get("test_file_subscription_value") == "is_overwritten"
+    assert value_sub.get("test_config_subscription_value") == "original"
+    assert value_sub.get("subscription_name") == "test_value"
+    assert value_sub.get("subscription_value") == "is_overwritten"
 
 
 def test_subscription_file_value_applies_from_config(
@@ -148,16 +174,69 @@ def test_subscription_file_value_applies_from_config(
     assert len(subs) == 2
 
     # Test __value__ worked correctly from the config
-    value_sub = subs[1]
-    assert value_sub.name == "test_value"
-    assert (
-        value_sub.overrides.dict_with_format_strings.get("test_file_subscription_value")
-        == "original"
-    )
-    assert (
-        value_sub.overrides.dict_with_format_strings.get("test_config_subscription_value")
-        == "is_overwritten"
-    )
+    value_sub = subs[1].overrides.dict_with_format_strings
+    assert value_sub.get("test_file_subscription_value") == "original"
+    assert value_sub.get("test_config_subscription_value") == "is_overwritten"
+    assert value_sub.get("subscription_name") == "test_value"
+    assert value_sub.get("subscription_value") == "is_overwritten"
+
+
+def test_subscription_file_value_applies_from_config_and_nested(
+    config_file_with_subscription_value: ConfigFile,
+    preset_with_subscription_value_nested_presets: Dict,
+):
+    with mock_load_yaml(preset_dict=preset_with_subscription_value_nested_presets):
+        subs = Subscription.from_file_path(
+            config=config_file_with_subscription_value, subscription_path="mocked"
+        )
+    assert len(subs) == 4
+
+    # Test __value__ worked correctly from the config
+    sub_1 = [sub for sub in subs if sub.name == "test_1"][0].overrides.dict_with_format_strings
+    sub_2_1 = [sub for sub in subs if sub.name == "test_2_1"][0].overrides.dict_with_format_strings
+
+    assert sub_1.get("test_config_subscription_value") == "is_1_overwritten"
+    assert sub_1.get("subscription_name") == "test_1"
+    assert sub_1.get("subscription_value") == "is_1_overwritten"
+
+    assert sub_2_1.get("test_config_subscription_value") == "is_2_1_overwritten"
+    assert sub_2_1.get("subscription_name") == "test_2_1"
+    assert sub_2_1.get("subscription_value") == "is_2_1_overwritten"
+
+
+def test_subscription_file_value_applies_from_config_and_nested_and_indent_variables(
+    config_file_with_subscription_value: ConfigFile,
+    preset_with_subscription_value_nested_presets_and_indent_variables: Dict,
+):
+    with mock_load_yaml(
+        preset_dict=preset_with_subscription_value_nested_presets_and_indent_variables
+    ):
+        subs = Subscription.from_file_path(
+            config=config_file_with_subscription_value, subscription_path="mocked"
+        )
+    assert len(subs) == 4
+
+    # Test __value__ worked correctly from the config
+    sub_test_value = [sub for sub in subs if sub.name == "test_value"][
+        0
+    ].overrides.dict_with_format_strings
+    sub_1 = [sub for sub in subs if sub.name == "test_1"][0].overrides.dict_with_format_strings
+    sub_2_1 = [sub for sub in subs if sub.name == "test_2_1"][0].overrides.dict_with_format_strings
+
+    assert sub_test_value.get("subscription_indent_1") == "original_1"
+    assert sub_test_value.get("subscription_indent_2") == "original_2"
+
+    assert sub_1.get("test_config_subscription_value") == "is_1_overwritten"
+    assert sub_1.get("subscription_name") == "test_1"
+    assert sub_1.get("subscription_value") == "is_1_overwritten"
+    assert sub_1.get("subscription_indent_1") == "INDENT_1"
+    assert sub_1.get("subscription_indent_2") == "INDENT_2"
+
+    assert sub_2_1.get("test_config_subscription_value") == "is_2_1_overwritten"
+    assert sub_2_1.get("subscription_name") == "test_2_1"
+    assert sub_2_1.get("subscription_value") == "is_2_1_overwritten"
+    assert sub_2_1.get("subscription_indent_1") == "INDENT_1"
+    assert sub_2_1.get("subscription_indent_2") == "original_2"
 
 
 def test_subscription_file_bad_value(config_file: ConfigFile):
@@ -173,12 +252,30 @@ def test_subscription_file_bad_value(config_file: ConfigFile):
 
 def test_subscription_file_using_value_when_not_defined(config_file: ConfigFile):
     with mock_load_yaml(
-        preset_dict={"sub_name": "single value, __value__ not defined"}
+        preset_dict={"[INDENTS_IN_ERR_MSG]": {"sub_name": "single value, __value__ not defined"}}
     ), pytest.raises(
         ValidationException,
         match=re.escape(
-            f"Subscription sub_name is a string, but "
-            f"the subscription value is not set to an override variable"
+            "Validation error in [INDENTS_IN_ERR_MSG].sub_name: Subscription "
+            "sub_name is a string, but the subscription value is not set to an override variable"
+        ),
+    ):
+        _ = Subscription.from_file_path(config=config_file, subscription_path="mocked")
+
+
+def test_subscription_file_using_conflicting_preset_name(config_file: ConfigFile):
+    with mock_load_yaml(
+        preset_dict={
+            "[INDENTS_IN_ERR_MSG]": {
+                "[ANOTHER]": {"jellyfin_tv_show_by_date": "single value, __value__ not defined"}
+            }
+        }
+    ), pytest.raises(
+        ValidationException,
+        match=re.escape(
+            "Validation error in [INDENTS_IN_ERR_MSG].[ANOTHER].jellyfin_tv_show_by_date: "
+            "jellyfin_tv_show_by_date conflicts with an existing preset name and cannot be used "
+            "as a subscription name"
         ),
     ):
         _ = Subscription.from_file_path(config=config_file, subscription_path="mocked")
@@ -187,6 +284,6 @@ def test_subscription_file_using_value_when_not_defined(config_file: ConfigFile)
 def test_subscription_file_invalid_form(config_file: ConfigFile):
     with mock_load_yaml(preset_dict={"sub_name": 4332}), pytest.raises(
         ValidationException,
-        match=re.escape(f"Subscription sub_name should be in the form of a preset"),
+        match=re.escape(f"Validation error in sub_name: should be of type object."),
     ):
         _ = Subscription.from_file_path(config=config_file, subscription_path="mocked")