mirror of
https://github.com/Alexander-D-Karpov/akarpov
synced 2024-11-14 20:16:34 +03:00
Damir Modyarov
21c02df7f0
* Implement short link redirect service * Silence linter where imports needs to be below setup * Improve unknown link error * Provide session to worker to convert it to user id * Remove main entrypoint in favor of uvicorn command * Add base path for relative URLs * Add docs on launching redirect service to README.md * Fix wrong task argument name * Lint service code
42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
from sqlalchemy.orm import Session
|
|
|
|
from redirect.db import models
|
|
from redirect.util import slug_to_link_id
|
|
|
|
|
|
class LinkNotFoundException(Exception):
|
|
def __init__(self, slug: str):
|
|
self.slug = slug
|
|
|
|
|
|
def get_link(db: Session, link_id: int):
|
|
"""Gets short link metdata by its id.
|
|
|
|
:param db Open connection to a database
|
|
:param link_id id of the link
|
|
|
|
:return link metadata"""
|
|
return db.query(models.Link).filter(models.Link.id == link_id).first()
|
|
|
|
|
|
_get_link_by_slug_cache = {}
|
|
|
|
|
|
def get_link_by_slug(db: Session, slug: str) -> tuple[int, str]:
|
|
"""Converts slug to id and gets related link target.
|
|
|
|
:param db Open connection to a database
|
|
:param slug of the link
|
|
|
|
:raise LinkNotFoundException if link is not found
|
|
:return target link id & url"""
|
|
if slug in _get_link_by_slug_cache:
|
|
return _get_link_by_slug_cache[slug]
|
|
|
|
link = get_link(db, slug_to_link_id(slug))
|
|
if link is None or not link.enabled:
|
|
raise LinkNotFoundException(slug)
|
|
|
|
_get_link_by_slug_cache[slug] = (link.id, link.source)
|
|
return link.id, link.source
|