good-bye script builder

src/ytdl_sub/config/preset.py

@@ -180,7 +180,7 @@ class Preset(_PresetShell):
 
         return added_variables
 
-    def __validate_and_get_plugins(self) -> PresetPlugins:
+    def _validate_and_get_plugins(self) -> PresetPlugins:
         preset_plugins = PresetPlugins()
 
         for key in self._keys:
@@ -194,7 +194,7 @@ class Preset(_PresetShell):
 
         return preset_plugins
 
-    def _validate_added_variables(self) -> Script:
+    def _validate_variable_usage(self) -> None:
         """
         Validate variables resolve as plugins are executed, and return
         a mock script which contains actualized added variables from the plugins
@@ -216,77 +216,100 @@ class Preset(_PresetShell):
             added_variables = plugin_options.added_source_variables(
                 unresolved_variables=unresolved_variables
             ).get(PluginOperation.MODIFY_ENTRY_METADATA, set())
-            script.add(ScriptUtils.add_dummy_variables(added_variables))
-            unresolved_variables -= added_variables
 
+            if added_variables:
+                script.add(ScriptUtils.add_dummy_variables(added_variables))
+                unresolved_variables -= added_variables
+
+        _ = script.resolve(unresolvable=unresolved_variables, update=True)
         for _, plugin_options in sorted(
             self.plugins.zipped(), key=lambda pl: pl[0].priority.modify_entry
         ):
             added_variables = plugin_options.added_source_variables(
                 unresolved_variables=unresolved_variables
             ).get(PluginOperation.MODIFY_ENTRY, set())
-            script.add(ScriptUtils.add_dummy_variables(added_variables))
+
-            unresolved_variables -= added_variables
+            if added_variables:
+                script.add(ScriptUtils.add_dummy_variables(added_variables))
+                unresolved_variables -= added_variables
+
+                _ = script.resolve(unresolvable=unresolved_variables, update=True)
+
+            # Validate that any formatter in the plugin options can resolve
+            self._validate_formatters(
+                mock_script=script,
+                unresolved_variables=unresolved_variables,
+                validator=plugin_options,
+            )
+
+        self._validate_formatters(
+            mock_script=script,
+            unresolved_variables=unresolved_variables,
+            validator=self.output_options,
+        )
 
         assert not unresolved_variables
-        _ = script.resolve(update=True)
+
         return script
 
-    @functools.cache
+    def _validate_string_formatter_validator(
-    def _get_unresolvable_variables(
-        self,
-        formatter_validator: Union[StringFormatterValidator, OverridesStringFormatterValidator],
-    ) -> Optional[Set[str]]:
-        unresolvable = (
-            self._added_variables.union([VARIABLES.entry_metadata.variable_name])
-            if isinstance(formatter_validator, OverridesStringFormatterValidator)
-            else None
-        )
-        return unresolvable
-
-    def __validate_override_string_formatter_validator(
         self,
         mock_script: Script,
+        unresolved_variables: Set[str],
         formatter_validator: Union[StringFormatterValidator, OverridesStringFormatterValidator],
     ) -> None:
         try:
+            unresolvable = unresolved_variables
+            if isinstance(formatter_validator, OverridesStringFormatterValidator):
+                unresolvable = unresolved_variables.union({VARIABLES.entry_metadata.variable_name})
+
             mock_script.resolve_once(
                 {"tmp_var": formatter_validator.format_string},
-                unresolvable=self._get_unresolvable_variables(formatter_validator),
+                unresolvable=unresolvable,
             )
         except VariableDoesNotExist as exc:
             raise StringFormattingVariableNotFoundException(exc) from exc
 
-    def __recursive_preset_validate(
+    def _validate_formatters(
         self,
         mock_script: Script,
-        validator: Optional[Validator] = None,
+        unresolved_variables: Set[str],
+        validator: Validator,
     ) -> None:
         """
         Ensure all OverridesStringFormatterValidator's only contain variables from the overrides
         and resolve.
         """
-        if validator is None:
-            validator = self
-
         if isinstance(validator, DictValidator):
             # pylint: disable=protected-access
             # Usage of protected variables in other validators is fine. The reason to keep
             # them protected is for readability when using them in subscriptions.
             for validator_value in validator._validator_dict.values():
-                self.__recursive_preset_validate(mock_script=mock_script, validator=validator_value)
+                self._validate_formatters(
+                    mock_script=mock_script,
+                    unresolved_variables=unresolved_variables,
+                    validator=validator_value,
+                )
             # pylint: enable=protected-access
         elif isinstance(validator, ListValidator):
             for list_value in validator.list:
-                self.__recursive_preset_validate(mock_script=mock_script, validator=list_value)
+                self._validate_formatters(
+                    mock_script=mock_script,
+                    unresolved_variables=unresolved_variables,
+                    validator=list_value,
+                )
         elif isinstance(validator, (StringFormatterValidator, OverridesStringFormatterValidator)):
-            self.__validate_override_string_formatter_validator(
+            self._validate_string_formatter_validator(
-                mock_script=mock_script, formatter_validator=validator
+                mock_script=mock_script,
+                unresolved_variables=unresolved_variables,
+                formatter_validator=validator,
             )
         elif isinstance(validator, (DictFormatterValidator, OverridesDictFormatterValidator)):
             for validator_value in validator.dict.values():
-                self.__validate_override_string_formatter_validator(
+                self._validate_string_formatter_validator(
-                    mock_script=mock_script, formatter_validator=validator_value
+                    mock_script=mock_script,
+                    unresolved_variables=unresolved_variables,
+                    formatter_validator=validator_value,
                 )
 
     def _get_presets_to_merge(
@@ -364,7 +387,7 @@ class Preset(_PresetShell):
             key="ytdl_options", validator=YTDLOptions, default={}
         )
 
-        self.plugins: PresetPlugins = self.__validate_and_get_plugins()
+        self.plugins: PresetPlugins = self._validate_and_get_plugins()
         self.overrides = self._validate_key(
             key="overrides", validator=Overrides, default={}
         ).initialize_script(
@@ -374,11 +397,7 @@ class Preset(_PresetShell):
             }
         )
 
-        mock_script = self._validate_added_variables()
+        self._validate_variable_usage()
-
-        # After all options are initialized, perform a recursive post-validate that requires
-        # values from multiple validators
-        self.__recursive_preset_validate(mock_script=mock_script)
 
     @property
     def name(self) -> str:

src/ytdl_sub/downloaders/url/validators.py

@@ -1,14 +1,11 @@
 import copy
 from typing import Any
 from typing import Dict
-from typing import List
 from typing import Optional
 from typing import Set
 
 from ytdl_sub.config.preset_options import OptionsValidator
 from ytdl_sub.config.preset_options import PluginOperation
-from ytdl_sub.script.script import Script
-from ytdl_sub.script.script import ScriptBuilder
 from ytdl_sub.validators.strict_dict_validator import StrictDictValidator
 from ytdl_sub.validators.string_formatter_validators import DictFormatterValidator
 from ytdl_sub.validators.string_formatter_validators import OverridesStringFormatterValidator

src/ytdl_sub/script/script.py

@@ -402,126 +402,3 @@ class Script:
             return resolvable
 
         raise RuntimeException(f"Tried to get unresolved variable {variable_name}")
-
-
-class ScriptBuilder:
-    """
-    Takes a dictionary of both
-        ``{ variable_names: syntax }``
-    and
-        ``{ %custom_function: syntax }``
-    """
-
-    def __init__(self, script: Dict[str, str]):
-        self._functions: Dict[str, SyntaxTree] = {
-            # custom_function_name must be passed to properly type custom function
-            # arguments uniquely if they're nested (i.e. $0 to $custom_func___0)
-            _function_name(function_key): parse(
-                text=function_value,
-                name=_function_name(function_key),
-            )
-            for function_key, function_value in script.items()
-            if _is_function(function_key)
-        }
-
-        self._variables: Dict[str, SyntaxTree] = {
-            variable_key: parse(
-                text=variable_value,
-                name=variable_key,
-            )
-            for variable_key, variable_value in script.items()
-            if not _is_function(variable_key)
-        }
-
-    def add(self, variables: Dict[str, str]) -> "ScriptBuilder":
-        for variable_name, variable_definition in variables.items():
-            self._variables[variable_name] = parse(
-                text=variable_definition,
-                name=variable_name,
-            )
-        return self
-
-    def add_resolved(self, variables: Dict[str, Resolvable]) -> "ScriptBuilder":
-        for variable_name, resolvable in variables.items():
-            self._variables[variable_name] = SyntaxTree(ast=[resolvable])
-
-        return self
-
-    @property
-    def _missing_metadata(self) -> Tuple[Dict[str, Set[str]], Dict[str, Set[str]]]:
-        variables_missing_metadata: Dict[str, Set[str]] = defaultdict(set)
-        functions_missing_metadata: Dict[str, Set[str]] = defaultdict(set)
-
-        defined_variables: Set[str] = set(self._variables.keys())
-        defined_functions: Set[str] = set(self._functions.keys())
-
-        while True:
-            variables_missing_metadata_snapshot = copy.deepcopy(variables_missing_metadata)
-            functions_missing_metadata_snapshot = copy.deepcopy(functions_missing_metadata)
-
-            for name, variable in self._variables.items():
-                if diff := {var.name for var in variable.variables}.difference(defined_variables):
-                    variables_missing_metadata[name].update(diff)
-
-                if diff := {fun.name for fun in variable.custom_functions}.difference(
-                    defined_functions
-                ):
-                    variables_missing_metadata[name].update(diff)
-
-            for name, function in self._functions.items():
-                if diff := {var.name for var in function.variables}.difference(defined_variables):
-                    functions_missing_metadata[name].update(diff)
-
-                if diff := {fun.name for fun in function.custom_functions}.difference(
-                    defined_functions
-                ):
-                    functions_missing_metadata[name].update(diff)
-
-            if (
-                variables_missing_metadata == variables_missing_metadata_snapshot
-                and functions_missing_metadata == functions_missing_metadata_snapshot
-            ):
-                break
-
-            defined_variables -= set(variables_missing_metadata.keys())
-            defined_functions -= set(functions_missing_metadata.keys())
-
-        return variables_missing_metadata, functions_missing_metadata
-
-    @classmethod
-    def _build(cls, variables: Dict[str, SyntaxTree], functions: Dict[str, SyntaxTree]) -> Script:
-        script = Script({})
-        script._variables = variables
-        script._functions = functions
-        script._validate()
-        return script
-
-    def partial_build(self) -> Script:
-        missing_variables, missing_functions = self._missing_metadata
-        maybe_resolvable_variables: Dict[str, SyntaxTree] = {
-            name: variable
-            for name, variable in self._variables.items()
-            if name not in missing_variables
-        }
-        maybe_resolvable_functions: Dict[str, SyntaxTree] = {
-            name: function
-            for name, function in self._functions.items()
-            if name not in missing_functions
-        }
-
-        script = self._build(
-            variables=maybe_resolvable_variables, functions=maybe_resolvable_functions
-        )
-        # Update internal variables with anything that is resolved
-        for variable_name, variable_output in script.resolve(update=True).output.items():
-            self._variables[variable_name] = SyntaxTree([variable_output])
-        return script
-
-    def build(self) -> Script:
-        for missing_metadata in self._missing_metadata:
-            for name, missing in missing_metadata.items():
-                raise ScriptBuilderMissingDefinitions(
-                    f"{name} is missing the following definitions: {', '.join(missing)}"
-                )
-
-        return self._build(variables=self._variables, functions=self._functions)

tests/unit/script/test_script_builder.py

@@ -1,55 +0,0 @@
-import re
-
-import pytest
-
-from ytdl_sub.script.script import Script
-from ytdl_sub.script.script import ScriptBuilder
-from ytdl_sub.script.types.map import Map
-from ytdl_sub.script.types.resolvable import String
-from ytdl_sub.script.utils.exceptions import ScriptBuilderMissingDefinitions
-from ytdl_sub.script.utils.exceptions import VariableDoesNotExist
-
-
-class TestScriptBuilder:
-    def test_partial_update_script(self):
-        # to be resolved later
-        entry_map = Map({String("title"): String("the title")})
-
-        script = ScriptBuilder(
-            {
-                "entry": "{ {} }",
-                "title": "{%map_get(entry, 'title', '')}",
-                "resolved_override": "{override} mom",
-            }
-        )
-
-        assert script.partial_build().resolve(unresolvable={"entry"})
-
-        with pytest.raises(
-            ScriptBuilderMissingDefinitions,
-            match=re.escape("resolved_override is missing the following definitions: override"),
-        ):
-            script.build()
-
-        script.add({"override": "hi"})
-        script.add_resolved({"entry": entry_map})
-
-        script.build()
-
-        # script.resolve(unresolvable={"entry"}, update=True)
-        # assert script.get("override") == String("hi")
-        # assert script.get("resolved_override") == String("hi mom")
-        #
-        # script.add(
-        #     {
-        #         "new_variable_titlecase": "{%titlecase(new_variable_upper)}",
-        #         "new_variable": "{resolved_override} {title}",
-        #         "new_variable_upper": "{%upper(new_variable)}",
-        #     }
-        # ).resolve(resolved={"entry": entry_map}, update=True)
-        #
-        # assert script.get("title") == String("the title")
-        # assert script.get("new_variable") == String("hi mom the title")
-        # assert script.get("new_variable_upper") == String("HI MOM THE TITLE")
-        # assert script.get("new_variable_titlecase") == String("Hi Mom The Title")
-        # assert script.get("entry") == entry_map