mirror of
https://github.com/Alexander-D-Karpov/akarpov
synced 2024-12-01 01:43:44 +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
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from redirect.db import models
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from redirect.util import slug_to_link_id
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class LinkNotFoundException(Exception):
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def __init__(self, slug: str):
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self.slug = slug
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def get_link(db: Session, link_id: int):
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"""Gets short link metdata by its id.
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:param db Open connection to a database
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:param link_id id of the link
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:return link metadata"""
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return db.query(models.Link).filter(models.Link.id == link_id).first()
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_get_link_by_slug_cache = {}
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def get_link_by_slug(db: Session, slug: str) -> tuple[int, str]:
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"""Converts slug to id and gets related link target.
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:param db Open connection to a database
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:param slug of the link
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:raise LinkNotFoundException if link is not found
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:return target link id & url"""
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if slug in _get_link_by_slug_cache:
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return _get_link_by_slug_cache[slug]
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link = get_link(db, slug_to_link_id(slug))
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if link is None or not link.enabled:
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raise LinkNotFoundException(slug)
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_get_link_by_slug_cache[slug] = (link.id, link.source)
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return link.id, link.source
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