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274
backend/app/routers/templates.py
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274
backend/app/routers/templates.py
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import json
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import os
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import uuid
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from typing import Annotated
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from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile, status
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from fastapi.responses import FileResponse
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from sqlalchemy.orm import Session, joinedload
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from app.auth import get_current_user
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from app.config import settings
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from app.database import get_db
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from app.models.template import DocumentTemplate, TemplateVariable
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from app.models.user import User
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from app.schemas import (
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DocumentTemplateListItem,
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DocumentTemplateResponse,
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TemplateUpdate,
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TemplateVariableResponse,
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TemplateVariableUpdate,
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)
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from app.services.access import (
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accessible_template,
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accessible_templates_query,
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can_manage_template,
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is_admin,
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manageable_template,
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)
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from app.services.docx_parser import parse_docx_template
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router = APIRouter(prefix="/api/templates", tags=["templates"])
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def _owner_username(template: DocumentTemplate) -> str | None:
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return template.owner.username if template.owner else None
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def _template_to_response(template: DocumentTemplate, current_user: User) -> DocumentTemplateResponse:
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variables = []
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for var in template.variables:
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style = None
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if var.style_params:
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try:
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style = json.loads(var.style_params)
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except json.JSONDecodeError:
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style = None
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variables.append(
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TemplateVariableResponse(
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id=var.id,
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name=var.name,
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label=var.label,
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field_type=var.field_type,
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default_value=var.default_value,
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is_required=var.is_required,
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order=var.order,
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parent_variable=var.parent_variable,
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style_params=style,
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)
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)
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return DocumentTemplateResponse(
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id=template.id,
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name=template.name,
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description=template.description,
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original_filename=template.original_filename,
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owner_id=template.owner_id,
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owner_username=_owner_username(template),
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is_public=template.is_public,
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is_owner=template.owner_id == current_user.id,
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created_at=template.created_at,
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updated_at=template.updated_at,
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variables=variables,
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)
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def _template_to_list_item(template: DocumentTemplate, current_user: User) -> DocumentTemplateListItem:
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return DocumentTemplateListItem(
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id=template.id,
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name=template.name,
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description=template.description,
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original_filename=template.original_filename,
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owner_id=template.owner_id,
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owner_username=_owner_username(template),
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is_public=template.is_public,
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is_owner=template.owner_id == current_user.id,
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created_at=template.created_at,
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variable_count=len(template.variables),
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)
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@router.get("", response_model=list[DocumentTemplateListItem])
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def list_templates(
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db: Annotated[Session, Depends(get_db)],
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current_user: Annotated[User, Depends(get_current_user)],
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):
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if is_admin(current_user):
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templates = (
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db.query(DocumentTemplate)
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.options(joinedload(DocumentTemplate.owner))
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.order_by(DocumentTemplate.created_at.desc())
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.all()
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)
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else:
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templates = (
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accessible_templates_query(db, current_user)
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.options(joinedload(DocumentTemplate.owner))
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.order_by(DocumentTemplate.created_at.desc())
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.all()
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)
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return [_template_to_list_item(t, current_user) for t in templates]
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@router.get("/{template_id}", response_model=DocumentTemplateResponse)
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def get_template(
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template_id: int,
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db: Annotated[Session, Depends(get_db)],
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current_user: Annotated[User, Depends(get_current_user)],
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):
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template = accessible_template(db, current_user, template_id)
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if not template:
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raise HTTPException(status_code=404, detail="Template not found")
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return _template_to_response(template, current_user)
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@router.get("/{template_id}/download")
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def download_template_source(
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template_id: int,
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db: Annotated[Session, Depends(get_db)],
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current_user: Annotated[User, Depends(get_current_user)],
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):
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template = accessible_template(db, current_user, template_id)
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if not template:
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raise HTTPException(status_code=404, detail="Template not found")
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if not os.path.exists(template.file_path):
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raise HTTPException(status_code=404, detail="Source file not found")
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return FileResponse(
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template.file_path,
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media_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document",
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filename=template.original_filename,
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)
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@router.patch("/{template_id}", response_model=DocumentTemplateResponse)
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def update_template(
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template_id: int,
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update: TemplateUpdate,
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db: Annotated[Session, Depends(get_db)],
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current_user: Annotated[User, Depends(get_current_user)],
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):
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template = manageable_template(db, current_user, template_id)
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if not template:
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raise HTTPException(status_code=404, detail="Template not found")
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for field, value in update.model_dump(exclude_unset=True).items():
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setattr(template, field, value)
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db.commit()
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db.refresh(template)
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return _template_to_response(template, current_user)
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@router.post("", response_model=DocumentTemplateResponse, status_code=status.HTTP_201_CREATED)
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async def create_template(
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db: Annotated[Session, Depends(get_db)],
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current_user: Annotated[User, Depends(get_current_user)],
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file: UploadFile = File(...),
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name: str = Form(...),
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description: str | None = Form(None),
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is_public: bool = Form(False),
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):
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if not file.filename or not file.filename.endswith(".docx"):
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raise HTTPException(status_code=400, detail="Only .docx files are supported")
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os.makedirs(settings.upload_dir, exist_ok=True)
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unique_name = f"{uuid.uuid4().hex}_{file.filename}"
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file_path = os.path.join(settings.upload_dir, unique_name)
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content = await file.read()
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with open(file_path, "wb") as f:
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f.write(content)
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parsed_vars = parse_docx_template(file_path)
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template = DocumentTemplate(
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name=name,
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description=description,
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original_filename=file.filename,
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file_path=file_path,
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owner_id=current_user.id,
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is_public=is_public,
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)
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db.add(template)
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db.flush()
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for pv in parsed_vars:
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db.add(
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TemplateVariable(
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template_id=template.id,
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name=pv.name,
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label=pv.label,
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field_type=pv.field_type,
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default_value=pv.default_value,
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is_required=pv.is_required,
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order=pv.order,
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parent_variable=pv.parent_variable,
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style_params=json.dumps(pv.style_params) if pv.style_params else None,
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)
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)
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db.commit()
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db.refresh(template)
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return _template_to_response(template, current_user)
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@router.put("/{template_id}/variables/{variable_id}", response_model=TemplateVariableResponse)
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def update_variable(
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template_id: int,
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variable_id: int,
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update: TemplateVariableUpdate,
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db: Annotated[Session, Depends(get_db)],
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current_user: Annotated[User, Depends(get_current_user)],
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):
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template = manageable_template(db, current_user, template_id)
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if not template:
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raise HTTPException(status_code=404, detail="Template not found")
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variable = db.query(TemplateVariable).filter(
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TemplateVariable.id == variable_id,
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TemplateVariable.template_id == template_id,
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).first()
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if not variable:
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raise HTTPException(status_code=404, detail="Variable not found")
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for field, value in update.model_dump(exclude_unset=True).items():
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setattr(variable, field, value)
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db.commit()
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db.refresh(variable)
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style = None
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if variable.style_params:
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try:
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style = json.loads(variable.style_params)
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except json.JSONDecodeError:
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pass
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return TemplateVariableResponse(
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id=variable.id,
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name=variable.name,
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label=variable.label,
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field_type=variable.field_type,
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default_value=variable.default_value,
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is_required=variable.is_required,
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order=variable.order,
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parent_variable=variable.parent_variable,
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style_params=style,
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)
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@router.delete("/{template_id}", status_code=status.HTTP_204_NO_CONTENT)
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def delete_template(
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template_id: int,
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db: Annotated[Session, Depends(get_db)],
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current_user: Annotated[User, Depends(get_current_user)],
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):
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template = manageable_template(db, current_user, template_id)
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if not template:
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raise HTTPException(status_code=404, detail="Template not found")
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if os.path.exists(template.file_path):
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os.remove(template.file_path)
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db.delete(template)
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db.commit()
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