flask_crud_app/definitions/attribute.py

from datetime import datetime
from typing import Optional, List, Tuple

# Base Attribute class
class Attribute:
    def __init__(
        self,
        attrib_name: str,  # Attribute name and id.
        display_name: str,  # Input label or table column header.
        html_input_type: str = "text",  # HTML form input type. Determines MySQL data type.
        placeholder: str = "",  # HTML form input placeholder.
        required: bool = False,  # HTML form input "required" attribute and MySQL "Not Null" constraint
        unique: bool = False,  # MySQL "unique" constraint
        primary: bool = False,  # MySQL "primary key" constraint
        index: bool = False,  # bool: MySQL index
        compareto: Optional[List[Tuple[str, str]]] = None,  # Compare to another attribute of the item for validation
        title: str = None,  # Description text, HTML "title" attribute
    ):
        if not attrib_name:
            raise ValueError("Attribute name cannot be empty.")
        if not display_name:
            raise ValueError(f"Display name cannot be empty for attribute '{attrib_name}'.")
        self.attrib_name = attrib_name
        self.display_name = display_name
        self.html_input_type = html_input_type
        self.placeholder = placeholder
        self.required = required
        self.unique = unique
        self.primary = primary
        self.index = index
        self.compareto = compareto
        self.title = title

        # Validate compareto
        if self.compareto is not None:
            validate_comparison(self)

# Text Attribute
class textAttribute(Attribute):
    def __init__(
        self,
        regex: Optional[str] = None,  # Regex for value validation
        default_val: str = None,  # Default value
        compareto: Optional[List[Tuple[str, str]]] = None,
        **kwargs  # Additional arguments for the base class
    ):
        super().__init__(html_input_type="text", **kwargs)
        self.regex = regex
        self.default_val = default_val
        self.compareto = compareto

# Integer Attribute
class intAttribute(Attribute):
    def __init__(
        self,
        min_val: Optional[int] = None,  # Min value
        max_val: Optional[int] = None,  # Max value
        step_val: Optional[int] = None,  # Increment step
        default_val: Optional[int] = None,  # Default value
        auto_increment: bool = False,  # bool: MySQL autoincrement
        compareto: Optional[List[Tuple[str, str]]] = None,
        **kwargs  # Additional arguments for the base class
    ):
        super().__init__(html_input_type="number", **kwargs)
        self.min_val = min_val
        self.max_val = max_val
        self.step_val = step_val
        self.default_val = default_val
        self.auto_increment = auto_increment
        self.compareto = compareto

        # Validate min_val and max_val
        if self.min_val is not None and self.max_val is not None and self.min_val > self.max_val:
            raise ValueError(f"min_val ({self.min_val}) cannot be greater than max_val ({self.max_val}).")

# Float Attribute
class floatAttribute(Attribute):
    def __init__(
        self,
        min_val: Optional[float] = None,  # Min value
        max_val: Optional[float] = None,  # Max value
        step_val: Optional[float] = None,  # Increment step
        default_val: Optional[float] = None,  # Default value
        auto_increment: bool = False,  # bool: MySQL autoincrement
        compareto: Optional[List[Tuple[str, str]]] = None,
        **kwargs  # Additional arguments for the base class
    ):
        super().__init__(html_input_type="number", **kwargs)
        self.min_val = min_val
        self.max_val = max_val
        self.step_val = step_val
        self.default_val = default_val
        self.auto_increment = auto_increment
        self.compareto = compareto

        # Validate min_val and max_val
        if self.min_val is not None and self.max_val is not None and self.min_val > self.max_val:
            raise ValueError(f"min_val ({self.min_val}) cannot be greater than max_val ({self.max_val}).")

# Date Attribute
class dateAttribute(Attribute):
    def __init__(
        self,
        min_val: Optional[str] = None,  # Min value (string in "YYYY-MM-DD" format)
        max_val: Optional[str] = None,  # Max value (string in "YYYY-MM-DD" format)
        default_val: Optional[str] = None,  # Default value (string in "YYYY-MM-DD" format)
        compareto: Optional[List[Tuple[str, str]]] = None,
        **kwargs  # Additional arguments for the base class
    ):
        super().__init__(html_input_type="date", **kwargs)
        self.min_val = self._parse_date(min_val) if min_val else None
        self.max_val = self._parse_date(max_val) if max_val else None
        self.default_val = self._parse_date(default_val) if default_val else None
        self.compareto = compareto

    def _parse_date(self, date_str: str) -> datetime:
        """Parse a date string into a datetime object."""
        try:
            return datetime.strptime(date_str, "%Y-%m-%d")
        except ValueError as e:
            raise ValueError(f"Invalid date format for '{date_str}'. Expected 'YYYY-MM-DD'.") from e

# Select Attribute
class selectAttribute(Attribute):
    def __init__(
        self,
        options: Optional[List[str]] = None,  # List of options
        default_val: Optional[str] = None,  # Default value
        **kwargs  # Additional arguments for the base class
    ):
        super().__init__(html_input_type="select", **kwargs)
        self.options = options if options else []
        self.default_val = default_val if default_val else (self.options[0] if self.options else None)

        # Validate default_val
        if self.default_val and self.default_val not in self.options:
            raise ValueError(f"Default value '{self.default_val}' is not in the options list.")