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Pydantic models and state definitions for the Polymer Datasheet Agent.
"""
from __future__ import annotations
import uuid
from datetime import datetime
from typing import Any, Literal, Optional
from pydantic import BaseModel, Field
# ── LangGraph State ──────────────────────────────────────────────────────────
class AgentState(BaseModel):
"""State that flows through the LangGraph workflow."""
# Input
input_mode: Literal["search", "upload"] = "search"
manufacturer: str = ""
polymer_family: str = ""
grade: str = ""
uploaded_text: str = "" # Raw text from uploaded PDF/file
# Search phase
search_queries: list[str] = Field(default_factory=list)
search_results: list[dict[str, Any]] = Field(default_factory=list)
raw_content: str = "" # Aggregated raw text from web/upload
# Parsing phase
parsed_datasheet: Optional[DatasheetRecord] = None
parsing_errors: list[str] = Field(default_factory=list)
# Output
status: str = "pending"
message: str = ""
# ── Datasheet Record ─────────────────────────────────────────────────────────
class DatasheetRecord(BaseModel):
"""A single parsed polymer datasheet stored in the database."""
id: str = Field(default_factory=lambda: str(uuid.uuid4()))
created_at: str = Field(default_factory=lambda: datetime.now().isoformat())
# General
material_name: str = ""
trade_name: str = ""
manufacturer: str = ""
polymer_family: str = ""
grade: str = ""
description: str = ""
processing_method: str = ""
features: str = ""
applications: str = ""
source_url: str = ""
# Mechanical
tensile_strength_mpa: str = ""
tensile_modulus_mpa: str = ""
elongation_at_break_pct: str = ""
flexural_strength_mpa: str = ""
flexural_modulus_mpa: str = ""
impact_strength_charpy_kj_m2: str = ""
impact_strength_izod_j_m: str = ""
hardness_shore_d: str = ""
hardness_rockwell: str = ""
compressive_strength_mpa: str = ""
# Thermal
melting_temperature_c: str = ""
glass_transition_temperature_c: str = ""
heat_deflection_temperature_c: str = ""
vicat_softening_temperature_c: str = ""
continuous_service_temperature_c: str = ""
thermal_conductivity_w_mk: str = ""
coefficient_of_thermal_expansion_um_mk: str = ""
flammability_rating: str = ""
# Physical
density_g_cm3: str = ""
melt_flow_index_g_10min: str = ""
water_absorption_pct: str = ""
moisture_absorption_pct: str = ""
specific_gravity: str = ""
transparency: str = ""
color: str = ""
# Electrical
dielectric_strength_kv_mm: str = ""
dielectric_constant: str = ""
volume_resistivity_ohm_cm: str = ""
surface_resistivity_ohm: str = ""
dissipation_factor: str = ""
# Chemical Resistance
acid_resistance: str = ""
alkali_resistance: str = ""
solvent_resistance: str = ""
uv_resistance: str = ""
weatherability: str = ""
# Regulatory
fda_approved: str = ""
rohs_compliant: str = ""
reach_compliant: str = ""
ul94_rating: str = ""
def to_flat_dict(self) -> dict[str, str]:
"""Return all fields as a flat dict for database storage."""
return self.model_dump()
# ── Search Result ────────────────────────────────────────────────────────────
class SearchResult(BaseModel):
"""One web search result from Tavily."""
title: str = ""
url: str = ""
content: str = ""
raw_content: str = ""
score: float = 0.0
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