feat: purchases added

migration/versions/6517eda4a92e_add_purchases_table.py

@@ -0,0 +1,74 @@
+"""add purchases table
+
+Revision ID: 6517eda4a92e
+Revises: e005b383b5c6
+Create Date: 2025-11-10 16:36:15.533520
+
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = '6517eda4a92e'
+down_revision: str | None = 'e005b383b5c6'
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        'purchases',
+        sa.Column('target_channel_id', sa.Uuid(), nullable=False),
+        sa.Column('external_channel_id', sa.Uuid(), nullable=False),
+        sa.Column('creative_id', sa.Uuid(), nullable=False),
+        sa.Column('user_id', sa.Uuid(), nullable=False),
+        sa.Column('placement_date', sa.DateTime(timezone=True), nullable=False),
+        sa.Column('cost', sa.Float(), nullable=True),
+        sa.Column('comment', sa.String(), nullable=True),
+        sa.Column('ad_post_url', sa.String(), nullable=True),
+        sa.Column('invite_link_type', sa.Enum('PUBLIC', 'APPROVAL', name='invitelinktype'), nullable=False),
+        sa.Column('invite_link', sa.String(), nullable=False),
+        sa.Column('status', sa.Enum('ACTIVE', 'ARCHIVED', name='purchasestatus'), nullable=False),
+        sa.Column('subscriptions_count', sa.Integer(), server_default='0', nullable=False),
+        sa.Column('views_count', sa.Integer(), nullable=True),
+        sa.Column('id', sa.Uuid(), nullable=False),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
+        sa.Column('deleted_at', sa.DateTime(timezone=True), nullable=True),
+        sa.ForeignKeyConstraint(
+            ['creative_id'],
+            ['creatives.id'],
+        ),
+        sa.ForeignKeyConstraint(
+            ['external_channel_id'],
+            ['externalchannels.id'],
+        ),
+        sa.ForeignKeyConstraint(
+            ['target_channel_id'],
+            ['targetchannels.id'],
+        ),
+        sa.ForeignKeyConstraint(
+            ['user_id'],
+            ['users.id'],
+        ),
+        sa.PrimaryKeyConstraint('id'),
+    )
+    op.create_index(op.f('ix_purchases_creative_id'), 'purchases', ['creative_id'], unique=False)
+    op.create_index(op.f('ix_purchases_external_channel_id'), 'purchases', ['external_channel_id'], unique=False)
+    op.create_index(op.f('ix_purchases_target_channel_id'), 'purchases', ['target_channel_id'], unique=False)
+    op.create_index(op.f('ix_purchases_user_id'), 'purchases', ['user_id'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_purchases_user_id'), table_name='purchases')
+    op.drop_index(op.f('ix_purchases_target_channel_id'), table_name='purchases')
+    op.drop_index(op.f('ix_purchases_external_channel_id'), table_name='purchases')
+    op.drop_index(op.f('ix_purchases_creative_id'), table_name='purchases')
+    op.drop_table('purchases')
+    # ### end Alembic commands ###

src/adapter/postgres.py

@@ -222,3 +222,80 @@ class Postgres(DatabaseBase):
         stmt = delete(domain.Creative).where(domain.Creative.id == creative_id)
         await self.session.execute(stmt)
         await self.session.flush()
+
+    async def get_purchase(self, user_id: uuid.UUID, purchase_id: uuid.UUID) -> domain.Purchase | None:
+        stmt = (
+            select(domain.Purchase)
+            .options(
+                selectinload(domain.Purchase.target_channel),
+                selectinload(domain.Purchase.external_channel),
+                selectinload(domain.Purchase.creative),
+            )
+            .where(domain.Purchase.id == purchase_id, domain.Purchase.user_id == user_id)
+        )
+        result = await self.session.execute(stmt)
+        return result.scalar_one_or_none()
+
+    async def create_purchase(self, purchase: domain.Purchase) -> domain.Purchase:
+        self.session.add(purchase)
+        await self.session.flush()
+        await self.session.refresh(
+            purchase,
+            ['target_channel', 'external_channel', 'creative'],
+        )
+        return purchase
+
+    async def update_purchase(self, purchase: domain.Purchase) -> domain.Purchase:
+        await self.session.flush()
+        await self.session.refresh(
+            purchase,
+            ['target_channel', 'external_channel', 'creative'],
+        )
+        return purchase
+
+    async def get_user_purchases(
+        self,
+        user_id: uuid.UUID,
+        *,
+        target_channel_id: uuid.UUID | None = None,
+        external_channel_id: uuid.UUID | None = None,
+        creative_id: uuid.UUID | None = None,
+        include_archived: bool = False,
+    ) -> list[domain.Purchase]:
+        stmt = (
+            select(domain.Purchase)
+            .options(
+                selectinload(domain.Purchase.target_channel),
+                selectinload(domain.Purchase.external_channel),
+                selectinload(domain.Purchase.creative),
+            )
+            .where(domain.Purchase.user_id == user_id)
+        )
+
+        if target_channel_id:
+            stmt = stmt.where(domain.Purchase.target_channel_id == target_channel_id)
+        if external_channel_id:
+            stmt = stmt.where(domain.Purchase.external_channel_id == external_channel_id)
+        if creative_id:
+            stmt = stmt.where(domain.Purchase.creative_id == creative_id)
+
+        if not include_archived:
+            stmt = stmt.where(domain.Purchase.status == domain.PurchaseStatus.ACTIVE)
+
+        stmt = stmt.order_by(domain.Purchase.placement_date.desc())
+
+        result = await self.session.execute(stmt)
+        return list(result.scalars().all())
+
+    async def delete_purchase(self, purchase_id: uuid.UUID) -> None:
+        stmt = delete(domain.Purchase).where(domain.Purchase.id == purchase_id)
+        await self.session.execute(stmt)
+        await self.session.flush()
+
+    async def check_creative_in_use(self, creative_id: uuid.UUID) -> bool:
+        stmt = select(domain.Purchase).where(
+            domain.Purchase.creative_id == creative_id,
+            domain.Purchase.status == domain.PurchaseStatus.ACTIVE,
+        )
+        result = await self.session.execute(stmt)
+        return result.scalar_one_or_none() is not None

src/adapter/telegram.py

@@ -19,3 +19,10 @@ class Telegram(TelegramBase):
     async def get_chat_member(self, chat_id: int, user_id: int) -> dict[str, Any]:
         member = await self.bot.get_chat_member(chat_id=chat_id, user_id=user_id)
         return member.model_dump()
+
+    async def create_chat_invite_link(self, chat_id: int, requires_approval: bool = False) -> str:
+        invite_link = await self.bot.create_chat_invite_link(
+            chat_id=chat_id,
+            creates_join_request=requires_approval,
+        )
+        return invite_link.invite_link

src/controller/http/__init__.py

@@ -3,6 +3,7 @@ from fastapi import APIRouter
 from src.controller.http.auth import auth_router
 from src.controller.http.creatives import creatives_router
 from src.controller.http.external_channels import external_channels_router
+from src.controller.http.purchases import purchases_router
 from src.controller.http.target_channels import target_channels_router
 
 api_router = APIRouter()
@@ -15,5 +16,6 @@ api_v1_router = APIRouter(prefix='/api/v1')
 api_v1_router.include_router(target_channels_router)
 api_v1_router.include_router(external_channels_router)
 api_v1_router.include_router(creatives_router)
+api_v1_router.include_router(purchases_router)
 
 api_router.include_router(api_v1_router)

src/controller/http/purchases.py

@@ -0,0 +1,87 @@
+import uuid
+from typing import Annotated
+
+from fastapi import Depends
+from fastapi.routing import APIRouter
+
+from src import dependencies, dto
+from src.adapter.jwt import JWTPayload
+
+purchases_router = APIRouter(prefix='/purchases', tags=['purchases'])
+
+
+@purchases_router.get('')
+async def list_purchases(
+    current_user: Annotated[JWTPayload, Depends(dependencies.get_current_user)],
+    target_channel_id: uuid.UUID | None = None,
+    external_channel_id: uuid.UUID | None = None,
+    creative_id: uuid.UUID | None = None,
+    include_archived: bool = False,
+) -> dto.GetPurchasesOutput:
+    input = dto.GetPurchasesInput(
+        user_id=current_user.user_id,
+        target_channel_id=target_channel_id,
+        external_channel_id=external_channel_id,
+        creative_id=creative_id,
+        include_archived=include_archived,
+    )
+
+    return await dependencies.get_usecase().get_purchases(input=input)
+
+
+@purchases_router.get('/{purchase_id}')
+async def get_purchase(
+    purchase_id: uuid.UUID,
+    current_user: Annotated[JWTPayload, Depends(dependencies.get_current_user)],
+) -> dto.PurchaseOutput:
+    input = dto.GetPurchaseInput(
+        purchase_id=purchase_id,
+        user_id=current_user.user_id,
+    )
+
+    return await dependencies.get_usecase().get_purchase(input=input)
+
+
+@purchases_router.post('')
+async def create_purchase(
+    request: dto.CreatePurchaseInput,
+    current_user: Annotated[JWTPayload, Depends(dependencies.get_current_user)],
+) -> dto.PurchaseOutput:
+    return await dependencies.get_usecase().create_purchase(request, current_user.user_id)
+
+
+@purchases_router.patch('/{purchase_id}')
+async def update_purchase(
+    purchase_id: uuid.UUID,
+    request: dto.UpdatePurchaseInput,
+    current_user: Annotated[JWTPayload, Depends(dependencies.get_current_user)],
+) -> dto.PurchaseOutput:
+    return await dependencies.get_usecase().update_purchase(
+        purchase_id=purchase_id,
+        input=request,
+        user_id=current_user.user_id,
+    )
+
+
+@purchases_router.post('/{purchase_id}/archive')
+async def archive_purchase(
+    purchase_id: uuid.UUID,
+    current_user: Annotated[JWTPayload, Depends(dependencies.get_current_user)],
+) -> dto.PurchaseOutput:
+    return await dependencies.get_usecase().archive_purchase(
+        purchase_id=purchase_id,
+        user_id=current_user.user_id,
+    )
+
+
+@purchases_router.delete('/{purchase_id}')
+async def delete_purchase(
+    purchase_id: uuid.UUID,
+    current_user: Annotated[JWTPayload, Depends(dependencies.get_current_user)],
+) -> None:
+    input = dto.DeletePurchaseInput(
+        purchase_id=purchase_id,
+        user_id=current_user.user_id,
+    )
+
+    await dependencies.get_usecase().delete_purchase(input)

src/domain/__init__.py

@@ -4,8 +4,11 @@ __all__ = (
     'TargetChannel',
     'ExternalChannel',
     'Creative',
+    'Purchase',
     'TargetChannelStatus',
     'CreativeStatus',
+    'PurchaseStatus',
+    'InviteLinkType',
     'LoginToken',
     'UserNotFound',
     'LoginTokenNotFound',
@@ -18,6 +21,7 @@ __all__ = (
     'ExternalChannelAlreadyExists',
     'CreativeNotFound',
     'CreativeInUse',
+    'PurchaseNotFound',
 )
 
 from .base import Base
@@ -32,10 +36,12 @@ from .error import (
     LoginTokenAlreadyUsed,
     LoginTokenExpired,
     LoginTokenNotFound,
+    PurchaseNotFound,
     TargetChannelNotFound,
     UserNotFound,
 )
 from .external_channel import ExternalChannel
 from .login_token import LoginToken
+from .purchase import InviteLinkType, Purchase, PurchaseStatus
 from .target_channel import TargetChannel, TargetChannelStatus
 from .user import User

src/domain/error.py

@@ -58,3 +58,9 @@ def CreativeInUse(creative_id: uuid.UUID) -> HTTPException:
         status.HTTP_400_BAD_REQUEST,
         f'Creative {creative_id} is used in active purchases and cannot be deleted',
     )
+
+
+def PurchaseNotFound(purchase_id: uuid.UUID | None = None) -> HTTPException:
+    if purchase_id is None:
+        return HTTPException(status.HTTP_404_NOT_FOUND, 'Purchase not found')
+    return HTTPException(status.HTTP_404_NOT_FOUND, f'Purchase {purchase_id} not found')

src/domain/purchase.py

@@ -0,0 +1,52 @@
+import datetime
+import uuid
+from enum import StrEnum
+from typing import TYPE_CHECKING
+
+from sqlalchemy import ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from src import domain
+
+if TYPE_CHECKING:
+    from .creative import Creative
+    from .external_channel import ExternalChannel
+    from .target_channel import TargetChannel
+
+
+class PurchaseStatus(StrEnum):
+    ACTIVE = 'active'
+    ARCHIVED = 'archived'
+
+
+class InviteLinkType(StrEnum):
+    PUBLIC = 'public'  # открытая ссылка
+    APPROVAL = 'approval'  # с одобрением ботом
+
+
+class Purchase(domain.Base):
+    # Основные поля
+    target_channel_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('targetchannels.id'), index=True)
+    external_channel_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('externalchannels.id'), index=True)
+    creative_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('creatives.id'), index=True)
+    user_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('users.id'), index=True)
+
+    # Данные закупа
+    placement_date: Mapped[datetime.datetime]  # дата размещения (планируемая или фактическая)
+    cost: Mapped[float | None]  # стоимость закупа
+    comment: Mapped[str | None]  # комментарий
+    ad_post_url: Mapped[str | None]  # ссылка на рекламное сообщение во внешнем канале
+    invite_link_type: Mapped[InviteLinkType]  # тип пригласительной ссылки
+    invite_link: Mapped[str]  # уникальная пригласительная ссылка
+
+    # Статус
+    status: Mapped[PurchaseStatus] = mapped_column(default=PurchaseStatus.ACTIVE)
+
+    # Метрики (будут обновляться из Telegram API)
+    subscriptions_count: Mapped[int] = mapped_column(default=0, server_default='0')
+    views_count: Mapped[int | None]  # просмотры рекламного поста (если доступны)
+
+    # Relationships
+    target_channel: Mapped['TargetChannel'] = relationship()
+    external_channel: Mapped['ExternalChannel'] = relationship()
+    creative: Mapped['Creative'] = relationship()

src/dto/__init__.py

@@ -26,6 +26,14 @@ __all__ = (
     'UpdateCreativeInput',
     'ArchiveCreativeInput',
     'DeleteCreativeInput',
+    'PurchaseOutput',
+    'GetPurchasesInput',
+    'GetPurchasesOutput',
+    'GetPurchaseInput',
+    'CreatePurchaseInput',
+    'UpdatePurchaseInput',
+    'ArchivePurchaseInput',
+    'DeletePurchaseInput',
 )
 
 from .creative import (
@@ -48,6 +56,16 @@ from .external_channel import (
     ImportExternalChannelsOutput,
     UpdateExternalChannelLinksInput,
 )
+from .purchase import (
+    ArchivePurchaseInput,
+    CreatePurchaseInput,
+    DeletePurchaseInput,
+    GetPurchaseInput,
+    GetPurchasesInput,
+    GetPurchasesOutput,
+    PurchaseOutput,
+    UpdatePurchaseInput,
+)
 from .target_channel import (
     ChannelBotPermissions,
     ConnectTargetChanInput,

src/dto/purchase.py

@@ -0,0 +1,71 @@
+import datetime
+import uuid
+
+import pydantic
+
+from src import domain
+
+
+class PurchaseOutput(pydantic.BaseModel):
+    id: uuid.UUID
+    target_channel_id: uuid.UUID
+    target_channel_title: str
+    external_channel_id: uuid.UUID
+    external_channel_title: str
+    creative_id: uuid.UUID
+    creative_name: str
+    placement_date: datetime.datetime
+    cost: float | None
+    comment: str | None
+    ad_post_url: str | None
+    invite_link_type: domain.InviteLinkType
+    invite_link: str
+    status: domain.PurchaseStatus
+    subscriptions_count: int
+    views_count: int | None
+    created_at: datetime.datetime
+
+
+class GetPurchasesInput(pydantic.BaseModel):
+    user_id: uuid.UUID
+    target_channel_id: uuid.UUID | None = None
+    external_channel_id: uuid.UUID | None = None
+    creative_id: uuid.UUID | None = None
+    include_archived: bool = False
+
+
+class GetPurchasesOutput(pydantic.BaseModel):
+    purchases: list[PurchaseOutput]
+
+
+class GetPurchaseInput(pydantic.BaseModel):
+    purchase_id: uuid.UUID
+    user_id: uuid.UUID
+
+
+class CreatePurchaseInput(pydantic.BaseModel):
+    target_channel_id: uuid.UUID
+    external_channel_id: uuid.UUID
+    creative_id: uuid.UUID
+    placement_date: datetime.datetime
+    cost: float | None = None
+    comment: str | None = None
+    ad_post_url: str | None = None
+    invite_link_type: domain.InviteLinkType = domain.InviteLinkType.PUBLIC
+
+
+class UpdatePurchaseInput(pydantic.BaseModel):
+    placement_date: datetime.datetime | None = None
+    cost: float | None = None
+    comment: str | None = None
+    ad_post_url: str | None = None
+
+
+class ArchivePurchaseInput(pydantic.BaseModel):
+    purchase_id: uuid.UUID
+    user_id: uuid.UUID
+
+
+class DeletePurchaseInput(pydantic.BaseModel):
+    purchase_id: uuid.UUID
+    user_id: uuid.UUID

src/usecase/__init__.py

@@ -16,6 +16,12 @@ from .external_channel.delete_external_channel import delete_external_channel
 from .external_channel.get_external_channels import get_external_channels
 from .external_channel.import_external_channels_from_excel import import_external_channels_from_excel
 from .external_channel.update_external_channel_links import update_external_channel_links
+from .purchase.archive_purchase import archive_purchase
+from .purchase.create_purchase import create_purchase
+from .purchase.delete_purchase import delete_purchase
+from .purchase.get_purchase import get_purchase
+from .purchase.get_purchases import get_purchases
+from .purchase.update_purchase import update_purchase
 from .target_channel.connect_target_chan import connect_target_chan
 from .target_channel.disconnect_target_chan import disconnect_target_chan
 from .target_channel.disconnect_target_chan_by_tg_id import disconnect_target_chan_by_tg_id
@@ -84,6 +90,26 @@ class Database(typing.Protocol):
 
     async def delete_creative(self, creative_id: UUID) -> None: ...
 
+    async def get_purchase(self, user_id: UUID, purchase_id: UUID) -> domain.Purchase | None: ...
+
+    async def create_purchase(self, purchase: domain.Purchase) -> domain.Purchase: ...
+
+    async def update_purchase(self, purchase: domain.Purchase) -> domain.Purchase: ...
+
+    async def get_user_purchases(
+        self,
+        user_id: UUID,
+        *,
+        target_channel_id: UUID | None = None,
+        external_channel_id: UUID | None = None,
+        creative_id: UUID | None = None,
+        include_archived: bool = False,
+    ) -> list[domain.Purchase]: ...
+
+    async def delete_purchase(self, purchase_id: UUID) -> None: ...
+
+    async def check_creative_in_use(self, creative_id: UUID) -> bool: ...
+
 
 class TelegramWriter(typing.Protocol):
     async def send_message(self, text: str, chat_id: int) -> None: ...
@@ -92,6 +118,8 @@ class TelegramWriter(typing.Protocol):
 
     async def get_chat_member(self, chat_id: int, user_id: int) -> dict[str, typing.Any]: ...
 
+    async def create_chat_invite_link(self, chat_id: int, requires_approval: bool = False) -> str: ...
+
 
 class JWTEncoder(typing.Protocol):
     def encode_access_token(self, user_id: UUID, telegram_id: int, username: str | None = None) -> str: ...
@@ -121,3 +149,9 @@ class Usecase:
     update_creative = update_creative
     archive_creative = archive_creative
     delete_creative = delete_creative
+    get_purchases = get_purchases
+    get_purchase = get_purchase
+    create_purchase = create_purchase
+    update_purchase = update_purchase
+    archive_purchase = archive_purchase
+    delete_purchase = delete_purchase

src/usecase/purchase/archive_purchase.py

@@ -0,0 +1,41 @@
+import logging
+import uuid
+from typing import TYPE_CHECKING
+
+from src import domain, dto
+
+if TYPE_CHECKING:
+    from .. import Usecase
+
+log = logging.getLogger(__name__)
+
+
+async def archive_purchase(self: 'Usecase', purchase_id: uuid.UUID, user_id: uuid.UUID) -> dto.PurchaseOutput:
+    async with self.database.transaction():
+        purchase = await self.database.get_purchase(user_id, purchase_id)
+        if not purchase:
+            log.warning('Purchase %s not found for user %s', purchase_id, user_id)
+            raise domain.PurchaseNotFound(purchase_id)
+
+        purchase.status = domain.PurchaseStatus.ARCHIVED
+        updated = await self.database.update_purchase(purchase)
+
+    return dto.PurchaseOutput(
+        id=updated.id,
+        target_channel_id=updated.target_channel_id,
+        target_channel_title=updated.target_channel.title,
+        external_channel_id=updated.external_channel_id,
+        external_channel_title=updated.external_channel.title,
+        creative_id=updated.creative_id,
+        creative_name=updated.creative.name,
+        placement_date=updated.placement_date,
+        cost=updated.cost,
+        comment=updated.comment,
+        ad_post_url=updated.ad_post_url,
+        invite_link_type=updated.invite_link_type,
+        invite_link=updated.invite_link,
+        status=updated.status,
+        subscriptions_count=updated.subscriptions_count,
+        views_count=updated.views_count,
+        created_at=updated.created_at,
+    )

src/usecase/purchase/create_purchase.py

@@ -0,0 +1,83 @@
+import logging
+import uuid
+from typing import TYPE_CHECKING
+
+from src import domain, dto
+
+if TYPE_CHECKING:
+    from .. import Usecase
+
+log = logging.getLogger(__name__)
+
+
+async def create_purchase(self: 'Usecase', input: dto.CreatePurchaseInput, user_id: uuid.UUID) -> dto.PurchaseOutput:
+    async with self.database.transaction():
+        # Проверяем существование целевого канала
+        target_channel = await self.database.get_target_channel(user_id, channel_id=input.target_channel_id)
+        if not target_channel:
+            log.warning(
+                'User %s attempted to create purchase for unavailable target %s', user_id, input.target_channel_id
+            )
+            raise domain.TargetChannelNotFound(input.target_channel_id)
+
+        # Проверяем существование внешнего канала
+        external_channel = await self.database.get_external_channel(user_id, channel_id=input.external_channel_id)
+        if not external_channel:
+            log.warning(
+                'User %s attempted to create purchase for unavailable external %s', user_id, input.external_channel_id
+            )
+            raise domain.ExternalChannelNotFound(input.external_channel_id)
+
+        # Проверяем существование креатива
+        creative = await self.database.get_creative(user_id, input.creative_id)
+        if not creative:
+            log.warning('User %s attempted to create purchase for unavailable creative %s', user_id, input.creative_id)
+            raise domain.CreativeNotFound(input.creative_id)
+
+        # Создаём уникальную пригласительную ссылку через Telegram Bot API
+        requires_approval = input.invite_link_type == domain.InviteLinkType.APPROVAL
+        invite_link = await self.telegram_writer.create_chat_invite_link(
+            chat_id=target_channel.telegram_id,
+            requires_approval=requires_approval,
+        )
+
+        # Создаём закуп
+        purchase = domain.Purchase(
+            target_channel_id=input.target_channel_id,
+            external_channel_id=input.external_channel_id,
+            creative_id=input.creative_id,
+            user_id=user_id,
+            placement_date=input.placement_date,
+            cost=input.cost,
+            comment=input.comment,
+            ad_post_url=input.ad_post_url,
+            invite_link_type=input.invite_link_type,
+            invite_link=invite_link,
+            status=domain.PurchaseStatus.ACTIVE,
+        )
+
+        created = await self.database.create_purchase(purchase)
+
+        # Увеличиваем счётчик закупов у креатива
+        creative.purchases_count += 1
+        await self.database.update_creative(creative)
+
+    return dto.PurchaseOutput(
+        id=created.id,
+        target_channel_id=created.target_channel_id,
+        target_channel_title=created.target_channel.title,
+        external_channel_id=created.external_channel_id,
+        external_channel_title=created.external_channel.title,
+        creative_id=created.creative_id,
+        creative_name=created.creative.name,
+        placement_date=created.placement_date,
+        cost=created.cost,
+        comment=created.comment,
+        ad_post_url=created.ad_post_url,
+        invite_link_type=created.invite_link_type,
+        invite_link=created.invite_link,
+        status=created.status,
+        subscriptions_count=created.subscriptions_count,
+        views_count=created.views_count,
+        created_at=created.created_at,
+    )

src/usecase/purchase/delete_purchase.py

@@ -0,0 +1,26 @@
+import logging
+from typing import TYPE_CHECKING
+
+from src import domain, dto
+
+if TYPE_CHECKING:
+    from .. import Usecase
+
+log = logging.getLogger(__name__)
+
+
+async def delete_purchase(self: 'Usecase', input: dto.DeletePurchaseInput) -> None:
+    async with self.database.transaction():
+        purchase = await self.database.get_purchase(input.user_id, input.purchase_id)
+        if not purchase:
+            log.warning('Purchase %s not found for user %s', input.purchase_id, input.user_id)
+            raise domain.PurchaseNotFound(input.purchase_id)
+
+        # Уменьшаем счётчик закупов у креатива, если закуп был активным
+        if purchase.status == domain.PurchaseStatus.ACTIVE:
+            creative = await self.database.get_creative(input.user_id, purchase.creative_id)
+            if creative and creative.purchases_count > 0:
+                creative.purchases_count -= 1
+                await self.database.update_creative(creative)
+
+        await self.database.delete_purchase(input.purchase_id)

src/usecase/purchase/get_purchase.py

@@ -0,0 +1,37 @@
+import logging
+from typing import TYPE_CHECKING
+
+from src import domain, dto
+
+if TYPE_CHECKING:
+    from .. import Usecase
+
+log = logging.getLogger(__name__)
+
+
+async def get_purchase(self: 'Usecase', input: dto.GetPurchaseInput) -> dto.PurchaseOutput:
+    async with self.database.transaction():
+        purchase = await self.database.get_purchase(input.user_id, input.purchase_id)
+        if not purchase:
+            log.warning('Purchase %s not found for user %s', input.purchase_id, input.user_id)
+            raise domain.PurchaseNotFound(input.purchase_id)
+
+    return dto.PurchaseOutput(
+        id=purchase.id,
+        target_channel_id=purchase.target_channel_id,
+        target_channel_title=purchase.target_channel.title,
+        external_channel_id=purchase.external_channel_id,
+        external_channel_title=purchase.external_channel.title,
+        creative_id=purchase.creative_id,
+        creative_name=purchase.creative.name,
+        placement_date=purchase.placement_date,
+        cost=purchase.cost,
+        comment=purchase.comment,
+        ad_post_url=purchase.ad_post_url,
+        invite_link_type=purchase.invite_link_type,
+        invite_link=purchase.invite_link,
+        status=purchase.status,
+        subscriptions_count=purchase.subscriptions_count,
+        views_count=purchase.views_count,
+        created_at=purchase.created_at,
+    )

src/usecase/purchase/get_purchases.py

@@ -0,0 +1,42 @@
+from typing import TYPE_CHECKING
+
+from src import dto
+
+if TYPE_CHECKING:
+    from .. import Usecase
+
+
+async def get_purchases(self: 'Usecase', input: dto.GetPurchasesInput) -> dto.GetPurchasesOutput:
+    async with self.database.transaction():
+        purchases = await self.database.get_user_purchases(
+            input.user_id,
+            target_channel_id=input.target_channel_id,
+            external_channel_id=input.external_channel_id,
+            creative_id=input.creative_id,
+            include_archived=input.include_archived,
+        )
+
+    return dto.GetPurchasesOutput(
+        purchases=[
+            dto.PurchaseOutput(
+                id=purchase.id,
+                target_channel_id=purchase.target_channel_id,
+                target_channel_title=purchase.target_channel.title,
+                external_channel_id=purchase.external_channel_id,
+                external_channel_title=purchase.external_channel.title,
+                creative_id=purchase.creative_id,
+                creative_name=purchase.creative.name,
+                placement_date=purchase.placement_date,
+                cost=purchase.cost,
+                comment=purchase.comment,
+                ad_post_url=purchase.ad_post_url,
+                invite_link_type=purchase.invite_link_type,
+                invite_link=purchase.invite_link,
+                status=purchase.status,
+                subscriptions_count=purchase.subscriptions_count,
+                views_count=purchase.views_count,
+                created_at=purchase.created_at,
+            )
+            for purchase in purchases
+        ]
+    )

src/usecase/purchase/update_purchase.py

@@ -0,0 +1,52 @@
+import logging
+import uuid
+from typing import TYPE_CHECKING
+
+from src import domain, dto
+
+if TYPE_CHECKING:
+    from .. import Usecase
+
+log = logging.getLogger(__name__)
+
+
+async def update_purchase(
+    self: 'Usecase', purchase_id: uuid.UUID, input: dto.UpdatePurchaseInput, user_id: uuid.UUID
+) -> dto.PurchaseOutput:
+    async with self.database.transaction():
+        purchase = await self.database.get_purchase(user_id, purchase_id)
+        if not purchase:
+            log.warning('Purchase %s not found for user %s', purchase_id, user_id)
+            raise domain.PurchaseNotFound(purchase_id)
+
+        # Обновляем только те поля, которые были переданы
+        if input.placement_date is not None:
+            purchase.placement_date = input.placement_date
+        if input.cost is not None:
+            purchase.cost = input.cost
+        if input.comment is not None:
+            purchase.comment = input.comment
+        if input.ad_post_url is not None:
+            purchase.ad_post_url = input.ad_post_url
+
+        updated = await self.database.update_purchase(purchase)
+
+    return dto.PurchaseOutput(
+        id=updated.id,
+        target_channel_id=updated.target_channel_id,
+        target_channel_title=updated.target_channel.title,
+        external_channel_id=updated.external_channel_id,
+        external_channel_title=updated.external_channel.title,
+        creative_id=updated.creative_id,
+        creative_name=updated.creative.name,
+        placement_date=updated.placement_date,
+        cost=updated.cost,
+        comment=updated.comment,
+        ad_post_url=updated.ad_post_url,
+        invite_link_type=updated.invite_link_type,
+        invite_link=updated.invite_link,
+        status=updated.status,
+        subscriptions_count=updated.subscriptions_count,
+        views_count=updated.views_count,
+        created_at=updated.created_at,
+    )

tests/conftest.py

@@ -1,6 +1,7 @@
 import datetime
 import uuid
-from typing import Any, AsyncContextManager
+from contextlib import AbstractAsyncContextManager
+from typing import Any
 from unittest.mock import AsyncMock
 
 import pytest
@@ -17,9 +18,10 @@ class MockDatabase:
         self.target_channels_by_telegram_id: dict[int, domain.TargetChannel] = {}
         self.external_channels: dict[uuid.UUID, domain.ExternalChannel] = {}
         self.creatives: dict[uuid.UUID, domain.Creative] = {}
+        self.purchases: dict[uuid.UUID, domain.Purchase] = {}
         self.m2m_target_external: dict[uuid.UUID, list[uuid.UUID]] = {}
 
-    def transaction(self) -> AsyncContextManager[None]:
+    def transaction(self) -> AbstractAsyncContextManager[None]:
         return AsyncMock()
 
     async def get_user(self, *, user_id: uuid.UUID | None = None, telegram_id: int | None = None) -> domain.User | None:
@@ -192,10 +194,74 @@ class MockDatabase:
     async def delete_creative(self, creative_id: uuid.UUID) -> None:
         self.creatives.pop(creative_id, None)
 
+    async def create_purchase(self, purchase: domain.Purchase) -> domain.Purchase:
+        if not purchase.id:
+            purchase.id = uuid.uuid4()
+        if not hasattr(purchase, 'created_at') or purchase.created_at is None:
+            purchase.created_at = datetime.datetime.now(datetime.UTC)
+        if not hasattr(purchase, 'updated_at') or purchase.updated_at is None:
+            purchase.updated_at = datetime.datetime.now(datetime.UTC)
+        if not hasattr(purchase, 'subscriptions_count') or purchase.subscriptions_count is None:
+            purchase.subscriptions_count = 0
+        if not hasattr(purchase, 'status') or purchase.status is None:
+            purchase.status = domain.PurchaseStatus.ACTIVE
+        # Загружаем связанные объекты
+        target_ch = self.target_channels.get(purchase.target_channel_id)
+        if target_ch:
+            purchase.target_channel = target_ch
+        ext_ch = self.external_channels.get(purchase.external_channel_id)
+        if ext_ch:
+            purchase.external_channel = ext_ch
+        creative = self.creatives.get(purchase.creative_id)
+        if creative:
+            purchase.creative = creative
+        self.purchases[purchase.id] = purchase
+        return purchase
+
+    async def get_purchase(self, user_id: uuid.UUID, purchase_id: uuid.UUID) -> domain.Purchase | None:
+        purchase = self.purchases.get(purchase_id)
+        if purchase and purchase.user_id == user_id:
+            return purchase
+        return None
+
+    async def update_purchase(self, purchase: domain.Purchase) -> domain.Purchase:
+        self.purchases[purchase.id] = purchase
+        return purchase
+
+    async def get_user_purchases(
+        self,
+        user_id: uuid.UUID,
+        *,
+        target_channel_id: uuid.UUID | None = None,
+        external_channel_id: uuid.UUID | None = None,
+        creative_id: uuid.UUID | None = None,
+        include_archived: bool = False,
+    ) -> list[domain.Purchase]:
+        result = [p for p in self.purchases.values() if p.user_id == user_id]
+        if target_channel_id:
+            result = [p for p in result if p.target_channel_id == target_channel_id]
+        if external_channel_id:
+            result = [p for p in result if p.external_channel_id == external_channel_id]
+        if creative_id:
+            result = [p for p in result if p.creative_id == creative_id]
+        if not include_archived:
+            result = [p for p in result if p.status == domain.PurchaseStatus.ACTIVE]
+        return sorted(result, key=lambda p: p.placement_date, reverse=True)
+
+    async def delete_purchase(self, purchase_id: uuid.UUID) -> None:
+        self.purchases.pop(purchase_id, None)
+
+    async def check_creative_in_use(self, creative_id: uuid.UUID) -> bool:
+        for purchase in self.purchases.values():
+            if purchase.creative_id == creative_id and purchase.status == domain.PurchaseStatus.ACTIVE:
+                return True
+        return False
+
 
 class MockTelegramWriter:
     def __init__(self) -> None:
         self.sent_messages: list[dict[str, Any]] = []
+        self.invite_link_counter = 0
 
     async def send_message(self, text: str, chat_id: int) -> None:
         self.sent_messages.append({'text': text, 'chat_id': chat_id, 'button': None})
@@ -208,6 +274,11 @@ class MockTelegramWriter:
     async def get_chat_member(self, chat_id: int, user_id: int) -> dict[str, Any]:
         return {}
 
+    async def create_chat_invite_link(self, chat_id: int, requires_approval: bool = False) -> str:
+        self.invite_link_counter += 1
+        link_type = 'approval' if requires_approval else 'public'
+        return f'https://t.me/+{link_type}_link_{self.invite_link_counter}_{chat_id}'
+
 
 class MockJWTEncoder:
     def encode_access_token(self, user_id: uuid.UUID, telegram_id: int, username: str | None = None) -> str:

tests/test_creatives.py

@@ -1,4 +1,5 @@
 """Тесты работы с креативами."""
+
 import pytest
 from fastapi import HTTPException
 
@@ -119,10 +120,18 @@ async def test_get_creatives_filtered_by_target_channel(usecases: usecase.Usecas
     await mock_database.upsert_target_channel(target2)
 
     creative1 = domain.Creative(
-        name='Creative 1', text='Text 1', target_channel_id=target1.id, user_id=user.id, status=domain.CreativeStatus.ACTIVE
+        name='Creative 1',
+        text='Text 1',
+        target_channel_id=target1.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
     )
     creative2 = domain.Creative(
-        name='Creative 2', text='Text 2', target_channel_id=target2.id, user_id=user.id, status=domain.CreativeStatus.ACTIVE
+        name='Creative 2',
+        text='Text 2',
+        target_channel_id=target2.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
     )
     await mock_database.create_creative(creative1)
     await mock_database.create_creative(creative2)
@@ -230,8 +239,5 @@ async def test_delete_creative(usecases: usecase.Usecase, mock_database: MockDat
     await usecases.delete_creative(dto.DeleteCreativeInput(creative_id=creative.id, user_id=user.id))
 
     # Проверяем, что креатив удалён
-    creatives_list = await usecases.get_creatives(
+    creatives_list = await usecases.get_creatives(dto.GetCreativesInput(user_id=user.id, include_archived=True))
-        dto.GetCreativesInput(user_id=user.id, include_archived=True)
-    )
     assert len(creatives_list.creatives) == 0
-

tests/test_purchases.py

@@ -0,0 +1,629 @@
+"""Тесты работы с закупами."""
+
+import datetime
+
+import pytest
+from fastapi import HTTPException
+
+from src import domain, dto, usecase
+from tests.conftest import MockDatabase
+
+
+@pytest.mark.asyncio
+async def test_create_purchase_with_public_invite_link(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Создание закупа с публичной пригласительной ссылкой."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description='Ad channel',
+        subscribers_count=50000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative = domain.Creative(
+        name='Summer Sale',
+        text='Подписывайтесь на наш канал по ссылке: {link}',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative)
+
+    placement_date = datetime.datetime.now(datetime.UTC)
+    input_data = dto.CreatePurchaseInput(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative.id,
+        placement_date=placement_date,
+        cost=5000.0,
+        comment='Утреннее размещение',
+        ad_post_url='https://t.me/externalchannel/123',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+    )
+
+    result = await usecases.create_purchase(input_data, user.id)
+
+    assert result.target_channel_id == target_channel.id
+    assert result.external_channel_id == external_channel.id
+    assert result.creative_id == creative.id
+    assert result.cost == 5000.0
+    assert result.comment == 'Утреннее размещение'
+    assert result.invite_link_type == domain.InviteLinkType.PUBLIC
+    assert result.invite_link.startswith('https://t.me/+public_link_')
+    assert result.status == domain.PurchaseStatus.ACTIVE
+    assert result.subscriptions_count == 0
+
+    # Проверяем, что счётчик закупов у креатива увеличился
+    updated_creative = await mock_database.get_creative(user.id, creative.id)
+    assert updated_creative is not None
+    assert updated_creative.purchases_count == 1
+
+
+@pytest.mark.asyncio
+async def test_create_purchase_with_approval_invite_link(
+    usecases: usecase.Usecase, mock_database: MockDatabase
+) -> None:
+    """Создание закупа с пригласительной ссылкой, требующей одобрения."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description=None,
+        subscribers_count=30000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative = domain.Creative(
+        name='Premium Creative',
+        text='Эксклюзивный контент: {link}',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative)
+
+    placement_date = datetime.datetime.now(datetime.UTC)
+    input_data = dto.CreatePurchaseInput(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative.id,
+        placement_date=placement_date,
+        invite_link_type=domain.InviteLinkType.APPROVAL,
+    )
+
+    result = await usecases.create_purchase(input_data, user.id)
+
+    assert result.invite_link_type == domain.InviteLinkType.APPROVAL
+    assert 'approval_link_' in result.invite_link
+
+
+@pytest.mark.asyncio
+async def test_create_purchase_invalid_target_channel(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Создание закупа для несуществующего целевого канала вызывает ошибку."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    import uuid
+
+    fake_target_id = uuid.uuid4()
+    fake_external_id = uuid.uuid4()
+    fake_creative_id = uuid.uuid4()
+
+    input_data = dto.CreatePurchaseInput(
+        target_channel_id=fake_target_id,
+        external_channel_id=fake_external_id,
+        creative_id=fake_creative_id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+    )
+
+    with pytest.raises(HTTPException) as exc_info:
+        await usecases.create_purchase(input_data, user.id)
+    assert exc_info.value.status_code == 404
+    assert 'Target channel' in str(exc_info.value.detail)
+
+
+@pytest.mark.asyncio
+async def test_get_user_purchases(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Получение списка закупов пользователя."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description=None,
+        subscribers_count=20000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative = domain.Creative(
+        name='Test Creative',
+        text='Test text',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative)
+
+    # Создаём два закупа
+    purchase1 = domain.Purchase(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        cost=3000.0,
+        invite_link='https://t.me/+link1',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    purchase2 = domain.Purchase(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC) - datetime.timedelta(days=1),
+        cost=4000.0,
+        invite_link='https://t.me/+link2',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    await mock_database.create_purchase(purchase1)
+    await mock_database.create_purchase(purchase2)
+
+    result = await usecases.get_purchases(dto.GetPurchasesInput(user_id=user.id))
+
+    assert len(result.purchases) == 2
+    # Проверяем сортировку по дате размещения (новые первые)
+    assert result.purchases[0].id == purchase1.id
+
+
+@pytest.mark.asyncio
+async def test_get_purchases_filtered_by_target_channel(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Получение закупов, отфильтрованных по целевому каналу."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target1 = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target 1',
+        username='target1',
+        user_id=user.id,
+        is_active=True,
+    )
+    target2 = domain.TargetChannel(
+        telegram_id=-1001234567891,
+        title='Target 2',
+        username='target2',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target1)
+    await mock_database.upsert_target_channel(target2)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description=None,
+        subscribers_count=15000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative1 = domain.Creative(
+        name='Creative 1',
+        text='Text 1',
+        target_channel_id=target1.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    creative2 = domain.Creative(
+        name='Creative 2',
+        text='Text 2',
+        target_channel_id=target2.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative1)
+    await mock_database.create_creative(creative2)
+
+    purchase1 = domain.Purchase(
+        target_channel_id=target1.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative1.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        invite_link='https://t.me/+link1',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    purchase2 = domain.Purchase(
+        target_channel_id=target2.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative2.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        invite_link='https://t.me/+link2',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    await mock_database.create_purchase(purchase1)
+    await mock_database.create_purchase(purchase2)
+
+    result = await usecases.get_purchases(dto.GetPurchasesInput(user_id=user.id, target_channel_id=target1.id))
+
+    assert len(result.purchases) == 1
+    assert result.purchases[0].target_channel_id == target1.id
+
+
+@pytest.mark.asyncio
+async def test_get_purchases_filtered_by_creative(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Получение закупов, отфильтрованных по креативу - для оценки эффективности креатива."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description=None,
+        subscribers_count=25000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative1 = domain.Creative(
+        name='Creative A',
+        text='Вариант A',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    creative2 = domain.Creative(
+        name='Creative B',
+        text='Вариант B',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative1)
+    await mock_database.create_creative(creative2)
+
+    # Создаём закупы с разными креативами
+    purchase1 = domain.Purchase(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative1.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        invite_link='https://t.me/+link1',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    purchase2 = domain.Purchase(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative2.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        invite_link='https://t.me/+link2',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    await mock_database.create_purchase(purchase1)
+    await mock_database.create_purchase(purchase2)
+
+    result = await usecases.get_purchases(dto.GetPurchasesInput(user_id=user.id, creative_id=creative1.id))
+
+    assert len(result.purchases) == 1
+    assert result.purchases[0].creative_id == creative1.id
+
+
+@pytest.mark.asyncio
+async def test_archive_purchase(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Архивирование закупа - убирает его из активной статистики."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description=None,
+        subscribers_count=18000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative = domain.Creative(
+        name='Test Creative',
+        text='Test text',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative)
+
+    purchase = domain.Purchase(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        invite_link='https://t.me/+link1',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    await mock_database.create_purchase(purchase)
+
+    result = await usecases.archive_purchase(purchase.id, user.id)
+
+    assert result.status == domain.PurchaseStatus.ARCHIVED
+
+    # Проверяем, что архивированный закуп не возвращается по умолчанию
+    purchases_list = await usecases.get_purchases(dto.GetPurchasesInput(user_id=user.id))
+    assert len(purchases_list.purchases) == 0
+
+    # Проверяем, что архивированный закуп возвращается с флагом include_archived
+    purchases_with_archived = await usecases.get_purchases(
+        dto.GetPurchasesInput(user_id=user.id, include_archived=True)
+    )
+    assert len(purchases_with_archived.purchases) == 1
+
+
+@pytest.mark.asyncio
+async def test_update_purchase(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Редактирование закупа - обновление стоимости, комментария, даты."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description=None,
+        subscribers_count=22000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative = domain.Creative(
+        name='Test Creative',
+        text='Test text',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative)
+
+    old_date = datetime.datetime.now(datetime.UTC) - datetime.timedelta(days=1)
+    purchase = domain.Purchase(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative.id,
+        user_id=user.id,
+        placement_date=old_date,
+        cost=3000.0,
+        comment='Старый комментарий',
+        invite_link='https://t.me/+link1',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    await mock_database.create_purchase(purchase)
+
+    new_date = datetime.datetime.now(datetime.UTC)
+    update_input = dto.UpdatePurchaseInput(
+        placement_date=new_date,
+        cost=3500.0,
+        comment='Обновлённый комментарий',
+        ad_post_url='https://t.me/externalchannel/456',
+    )
+    result = await usecases.update_purchase(purchase.id, update_input, user.id)
+
+    assert result.placement_date == new_date
+    assert result.cost == 3500.0
+    assert result.comment == 'Обновлённый комментарий'
+    assert result.ad_post_url == 'https://t.me/externalchannel/456'
+
+
+@pytest.mark.asyncio
+async def test_delete_purchase(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Удаление закупа - уменьшает счётчик закупов у креатива."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external_channel = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External Channel',
+        username='externalchannel',
+        description=None,
+        subscribers_count=28000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external_channel)
+
+    creative = domain.Creative(
+        name='Test Creative',
+        text='Test text',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+        purchases_count=1,
+    )
+    await mock_database.create_creative(creative)
+
+    purchase = domain.Purchase(
+        target_channel_id=target_channel.id,
+        external_channel_id=external_channel.id,
+        creative_id=creative.id,
+        user_id=user.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        invite_link='https://t.me/+link1',
+        invite_link_type=domain.InviteLinkType.PUBLIC,
+        status=domain.PurchaseStatus.ACTIVE,
+    )
+    await mock_database.create_purchase(purchase)
+
+    await usecases.delete_purchase(dto.DeletePurchaseInput(purchase_id=purchase.id, user_id=user.id))
+
+    # Проверяем, что закуп удалён
+    purchases_list = await usecases.get_purchases(dto.GetPurchasesInput(user_id=user.id, include_archived=True))
+    assert len(purchases_list.purchases) == 0
+
+    # Проверяем, что счётчик закупов у креатива уменьшился
+    updated_creative = await mock_database.get_creative(user.id, creative.id)
+    assert updated_creative is not None
+    assert updated_creative.purchases_count == 0
+
+
+@pytest.mark.asyncio
+async def test_multiple_purchases_same_creative(usecases: usecase.Usecase, mock_database: MockDatabase) -> None:
+    """Создание нескольких закупов с одним креативом - для A/B тестирования в разных каналах."""
+    user = domain.User(telegram_id=123456, username='testuser')
+    await mock_database.create_user(user)
+
+    target_channel = domain.TargetChannel(
+        telegram_id=-1001234567890,
+        title='Target Channel',
+        username='targetchannel',
+        user_id=user.id,
+        is_active=True,
+    )
+    await mock_database.upsert_target_channel(target_channel)
+
+    external1 = domain.ExternalChannel(
+        telegram_id=-1009876543210,
+        title='External 1',
+        username='external1',
+        description=None,
+        subscribers_count=10000,
+        user_id=user.id,
+    )
+    external2 = domain.ExternalChannel(
+        telegram_id=-1009876543211,
+        title='External 2',
+        username='external2',
+        description=None,
+        subscribers_count=20000,
+        user_id=user.id,
+    )
+    await mock_database.create_external_channel(external1)
+    await mock_database.create_external_channel(external2)
+
+    creative = domain.Creative(
+        name='Universal Creative',
+        text='Универсальный текст',
+        target_channel_id=target_channel.id,
+        user_id=user.id,
+        status=domain.CreativeStatus.ACTIVE,
+    )
+    await mock_database.create_creative(creative)
+
+    # Создаём два закупа с одним креативом в разных внешних каналах
+    input1 = dto.CreatePurchaseInput(
+        target_channel_id=target_channel.id,
+        external_channel_id=external1.id,
+        creative_id=creative.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        cost=2000.0,
+    )
+    input2 = dto.CreatePurchaseInput(
+        target_channel_id=target_channel.id,
+        external_channel_id=external2.id,
+        creative_id=creative.id,
+        placement_date=datetime.datetime.now(datetime.UTC),
+        cost=4000.0,
+    )
+
+    result1 = await usecases.create_purchase(input1, user.id)
+    result2 = await usecases.create_purchase(input2, user.id)
+
+    # Проверяем, что созданы два разных закупа
+    assert result1.id != result2.id
+    assert result1.invite_link != result2.invite_link
+
+    # Проверяем, что счётчик креатива увеличился на 2
+    updated_creative = await mock_database.get_creative(user.id, creative.id)
+    assert updated_creative is not None
+    assert updated_creative.purchases_count == 2
+
+    # Проверяем фильтрацию по креативу
+    purchases_for_creative = await usecases.get_purchases(
+        dto.GetPurchasesInput(user_id=user.id, creative_id=creative.id)
+    )
+    assert len(purchases_for_creative.purchases) == 2