mirror of
https://github.com/developersIndia/deviras.git
synced 2024-11-08 13:42:34 +05:30
254 lines
7.0 KiB
Python
254 lines
7.0 KiB
Python
import json
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import logging
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import re
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from copy import deepcopy
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from dataclasses import dataclass
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from os import environ, fsync
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from time import strftime, time
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import feedparser
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import praw
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SECONDS_IN_WEEK = 60 * 60 * 24 * 7
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# Date Month, Year
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STRFTIME_FORMAT = "%d %B, %Y"
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class Config:
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DB_PATH = "db.json"
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SUBREDDIT = "developersindia"
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POST_FLAIR = "Hiring"
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POST_TITLE = f"Don't Miss Out on These Job Opportunities | Weekly Job Openings Thread | {strftime(STRFTIME_FORMAT)}"
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POST_TEXT = """\
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This thread has all the latest job openings that haven't been posted on previous weekly threads.
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If you have a job opening that you'd like to share with the community, you can post it using this link:- https://developersindia.in/post-a-job/
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For all the available job openings, check out the Job Board at:- https://developersindia.in/job-board/
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Stay tuned for updates on the latest job openings, and apply for the ones that interest you. Wishing you the best of luck in your job search!\
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"""
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CLIENT_ID = environ["REDDIT_CLIENT_ID"]
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CLIENT_SECRET = environ["REDDIT_CLIENT_SECRET"]
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REDDIT_PASSWORD = environ["REDDIT_PASSWORD"]
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USERNAME = environ["REDDIT_USERNAME"]
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USER_AGENT = f"u/{USERNAME} Job Board"
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FEED_URL = "https://developersindia.in/?feed=job_feed"
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@dataclass
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class Post:
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post_id: str
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epoch: int
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def dict_raise_or_set(d, key, value):
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if d.get(key) is not None:
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raise ValueError(f"Key {key} already present in dictionary")
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d[key] = value
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class DB:
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POSTS = "postid_epoch"
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COMMENTS = "jobid_commentid"
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def __init__(self, db_path):
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try:
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self._fp = open(db_path, "r+")
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self._db = json.loads(self._fp.read() or "{}")
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except FileNotFoundError:
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self._fp = open(db_path, "w")
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self._db = {}
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self._copy = None
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self._create()
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def __enter__(self):
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self._copy = deepcopy(self._db)
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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# We re-write the DB on each transaction as we cannot guarantee "atomicity"
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# when dealing with external APIs. Eg, we can locally roll back a transaction
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# inserting multiple posts into the DB in case of an exception, but the
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# posts obviously won't be deleted on the reddit side. So we write
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# as much as possible incrementally to prevent losing track of already created
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# posts, preventing their re-creation server side in case of a crash.
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if exc_type:
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self._db = self._copy
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# If a change was actually made
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elif self._db != self._copy:
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self._fp.seek(0)
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self._fp.write(json.dumps(self._db, indent=4))
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self._fp.truncate() # Trim the file to the desired size
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fsync(self._fp)
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self._copy = None
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def _create(self):
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with self:
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self._db.setdefault(DB.POSTS, {})
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self._db.setdefault(DB.COMMENTS, {})
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def get_latest_post(self) -> Post | None:
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# {"id": 1234, "id2": "5678"} -> ("id2", "5678") (Descending)
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try:
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result = sorted(
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self._db[DB.POSTS].items(),
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key=lambda item: item[1],
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reverse=True,
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)[0]
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except IndexError:
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return None
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return Post(post_id=result[0], epoch=result[1])
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def insert_post(self, post: Post):
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with self:
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dict_raise_or_set(self._db[DB.POSTS], post.post_id, post.epoch)
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def insert_comment(self, feed_job_id: str, comment_id: str):
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with self:
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dict_raise_or_set(self._db[DB.COMMENTS], feed_job_id, comment_id)
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def is_job_posted(self, feed_job_id: str):
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return self._db[DB.COMMENTS].get(feed_job_id) is not None
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@dataclass
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class Job:
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post_id: str # Used for deduplication
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title: str
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company_name: str
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location: str
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job_type: str
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salary: str
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summary: str
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permalink: str
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def strip_html(text):
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return re.sub("<[^<]+?>", "", text)
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def get_job_entries(feed_url):
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entries = feedparser.parse(feed_url).entries
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return [
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Job(
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post_id=entry["post-id"],
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title=entry["title"],
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company_name=entry["job_listing_company"],
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location=entry.get("job_listing_location", "N/A"),
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job_type=entry["job_listing_job_type"],
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salary=entry.get("job_listing_salary", "N/A"),
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summary=strip_html(entry["summary"]),
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permalink=entry["link"],
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)
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for entry in entries
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]
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def should_create_new_post(latest_post: Post) -> bool:
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if latest_post is not None:
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return (time() - latest_post.epoch) >= SECONDS_IN_WEEK
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return True
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def create_job_post(subreddit) -> Post:
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# https://old.reddit.com/r/redditdev/comments/ovte4q/praw_flair_a_post/h7doqmd/?context=3
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flair = next(
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filter(
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lambda flair: flair["flair_text"] == Config.POST_FLAIR,
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subreddit.flair.link_templates.user_selectable(),
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)
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)
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submission = subreddit.submit(
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Config.POST_TITLE,
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selftext=Config.POST_TEXT,
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flair_id=flair["flair_template_id"],
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)
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submission.mod.sticky()
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return Post(post_id=submission.id, epoch=submission.created_utc)
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def main():
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logging.root.setLevel(logging.INFO)
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db = DB(Config.DB_PATH)
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reddit = praw.Reddit(
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client_id=Config.CLIENT_ID,
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client_secret=Config.CLIENT_SECRET,
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password=Config.REDDIT_PASSWORD,
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user_agent=Config.USER_AGENT,
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username=Config.USERNAME,
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)
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subreddit = reddit.subreddit(Config.SUBREDDIT)
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maybe_old_post = db.get_latest_post()
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logging.info(f"Latest post in database {maybe_old_post}")
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if should_create_new_post(maybe_old_post):
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# Un-stick/pin the old post
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if maybe_old_post is not None:
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logging.info(f"Un-pinning old post {maybe_old_post}")
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try:
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reddit.submission(maybe_old_post.post_id).mod.sticky(
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state=False
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)
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except Exception:
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logging.warning(f"Failed to un-pin post!", exc_info=True)
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new_post = create_job_post(subreddit)
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logging.info(f"Created new post {new_post}")
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db.insert_post(new_post)
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submission = reddit.submission(db.get_latest_post().post_id)
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logging.info(f"Fetched latest submission {submission.id}")
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for job in get_job_entries(Config.FEED_URL):
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if db.is_job_posted(job.post_id):
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logging.warning(
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f"Ignoring already posted job with post ID {job.post_id}"
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)
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continue
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comment_text = f"""\
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[**{job.title}** - {job.company_name}]({job.permalink})
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**Salary:** {job.salary}
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**Location:** {job.location}
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**Job Type:** {job.job_type}
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### Summary
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{job.summary}\
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"""
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comment = submission.reply(comment_text)
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db.insert_comment(job.post_id, comment.id)
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logging.info(
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f"Posted job with post ID {job.post_id} as reddit comment {comment.id}"
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)
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if __name__ == "__main__":
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main()
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