Add monitoring PF service

app/models.py

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+from datetime import datetime
+from enum import Enum
+
+from sqlalchemy import DateTime, Enum as SAEnum, Float, ForeignKey, Integer, String, Text, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.db import Base
+
+
+class DealType(str, Enum):
+    SALE = "sale"
+    RENT = "rent"
+
+
+class Source(str, Enum):
+    PROPERTYFINDER = "propertyfinder"
+    BAYUT = "bayut"
+
+
+class ListingStatus(str, Enum):
+    ACTIVE = "active"
+    REMOVED = "removed"
+
+
+class Employee(Base):
+    __tablename__ = "employees"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    name: Mapped[str] = mapped_column(String(200))
+    tg_chat_id: Mapped[str | None] = mapped_column(String(64), unique=True, nullable=True)
+    tg_username: Mapped[str | None] = mapped_column(String(200), nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    projects: Mapped[list["Project"]] = relationship(back_populates="owner")
+
+
+class Project(Base):
+    """Наш проект — квартира, которую агентство рекламирует."""
+
+    __tablename__ = "projects"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    title: Mapped[str] = mapped_column(String(300))
+    deal_type: Mapped[DealType] = mapped_column(SAEnum(DealType))
+    our_price: Mapped[float | None] = mapped_column(Float, nullable=True)
+    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
+
+    # Опциональные параметры — используются для подсказок похожих объявлений
+    dld_permit: Mapped[str | None] = mapped_column(String(100), index=True, nullable=True)
+    building: Mapped[str | None] = mapped_column(String(300), nullable=True)
+    bedrooms: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    size_sqft: Mapped[float | None] = mapped_column(Float, nullable=True)
+    our_url: Mapped[str | None] = mapped_column(Text, nullable=True)
+
+    owner_id: Mapped[int] = mapped_column(ForeignKey("employees.id"))
+    owner: Mapped[Employee] = relationship(back_populates="projects")
+
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    last_checked_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+
+    listings: Mapped[list["CompetitorListing"]] = relationship(
+        back_populates="project", cascade="all, delete-orphan"
+    )
+
+
+class CompetitorListing(Base):
+    """Объявление конкурента, найденное на PF/Bayut по DLD permit нашего проекта."""
+
+    __tablename__ = "competitor_listings"
+    __table_args__ = (UniqueConstraint("project_id", "source", "external_id", name="uq_listing"),)
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    project_id: Mapped[int] = mapped_column(ForeignKey("projects.id"))
+    project: Mapped[Project] = relationship(back_populates="listings")
+
+    source: Mapped[Source] = mapped_column(SAEnum(Source))
+    external_id: Mapped[str] = mapped_column(String(100))  # ID на стороне PF/Bayut
+    url: Mapped[str] = mapped_column(Text)
+    title: Mapped[str | None] = mapped_column(String(500), nullable=True)
+    agent_name: Mapped[str | None] = mapped_column(String(300), nullable=True)
+    agency_name: Mapped[str | None] = mapped_column(String(300), nullable=True)
+
+    current_price: Mapped[float | None] = mapped_column(Float, nullable=True)
+    currency: Mapped[str | None] = mapped_column(String(10), nullable=True, default="AED")
+    status: Mapped[ListingStatus] = mapped_column(SAEnum(ListingStatus), default=ListingStatus.ACTIVE)
+
+    first_seen_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    last_seen_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    price_history: Mapped[list["PriceHistory"]] = relationship(
+        back_populates="listing", cascade="all, delete-orphan", order_by="PriceHistory.recorded_at.desc()"
+    )
+
+
+class PriceHistory(Base):
+    __tablename__ = "price_history"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    listing_id: Mapped[int] = mapped_column(ForeignKey("competitor_listings.id"))
+    listing: Mapped[CompetitorListing] = relationship(back_populates="price_history")
+
+    price: Mapped[float | None] = mapped_column(Float, nullable=True)
+    recorded_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)