input-validation

Input Validation for Construction Data

Overview

Validate incoming construction data before processing to catch errors early. Domain-specific validation rules for estimates, schedules, BIM exports, and field data.

Validation Framework

Core Validator Class

from dataclasses import dataclass, field
from typing import List, Dict, Any, Callable, Optional
from enum import Enum
import re
from datetime import datetime

class ValidationSeverity(Enum):
    ERROR = "error"      # Must fix, blocks processing
    WARNING = "warning"  # Should review, allows processing
    INFO = "info"        # FYI, no action needed

@dataclass
class ValidationIssue:
    field: str
    message: str
    severity: ValidationSeverity
    value: Any = None
    suggestion: str = None

@dataclass
class ValidationResult:
    is_valid: bool
    issues: List[ValidationIssue] = field(default_factory=list)

    def add_error(self, field: str, message: str, value: Any = None, suggestion: str = None):
        self.issues.append(ValidationIssue(field, message, ValidationSeverity.ERROR, value, suggestion))
        self.is_valid = False

    def add_warning(self, field: str, message: str, value: Any = None, suggestion: str = None):
        self.issues.append(ValidationIssue(field, message, ValidationSeverity.WARNING, value, suggestion))

    def add_info(self, field: str, message: str, value: Any = None):
        self.issues.append(ValidationIssue(field, message, ValidationSeverity.INFO, value))

    @property
    def errors(self) -> List[ValidationIssue]:
        return [i for i in self.issues if i.severity == ValidationSeverity.ERROR]

    @property
    def warnings(self) -> List[ValidationIssue]:
        return [i for i in self.issues if i.severity == ValidationSeverity.WARNING]

    def to_report(self) -> str:
        lines = ["VALIDATION REPORT", "=" * 50]
        lines.append(f"Status: {'PASSED' if self.is_valid else 'FAILED'}")
        lines.append(f"Errors: {len(self.errors)}, Warnings: {len(self.warnings)}")
        lines.append("")

        for issue in self.issues:
            icon = "❌" if issue.severity == ValidationSeverity.ERROR else "⚠️" if issue.severity == ValidationSeverity.WARNING else "ℹ️"
            lines.append(f"{icon} [{issue.field}] {issue.message}")
            if issue.suggestion:
                lines.append(f"   Suggestion: {issue.suggestion}")

        return "\n".join(lines)