new component - upload to NAS

news_fetch/Dockerfile

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+FROM python:latest
+
+ENV TZ Europe/Zurich
+
+# RUN echo "deb http://deb.debian.org/debian/ unstable main contrib non-free" >> /etc/apt/sources.list
+# allows the installation of the latest firefox-release (debian is not usually a rolling release)
+RUN apt-get update && apt-get install -y \
+evince \
+# for checking
+xauth \
+#for gui
+# wget tar firefox \
+# for geckodriver
+ghostscript
+# for compression
+
+
+# Download gecko (firefox) driver for selenium
+# RUN wget https://github.com/mozilla/geckodriver/releases/download/v0.31.0/geckodriver-v0.31.0-linux64.tar.gz
+# RUN tar -x geckodriver -zf geckodriver-v0.31.0-linux64.tar.gz -O > /usr/bin/geckodriver
+# RUN chmod +x /usr/bin/geckodriver
+# RUN rm geckodriver-v0.31.0-linux64.tar.gz
+
+
+RUN useradd --create-home --shell /bin/bash --uid 1001 autonews
+# id mapped to local user
+# home directory needed for pip package installation
+RUN mkdir -p /app/auto_news
+RUN chown -R autonews:autonews /app
+USER autonews
+RUN export PATH=/home/autonews/.local/bin:$PATH
+
+COPY requirements.txt /app/requirements.txt
+RUN python3 -m pip install -r /app/requirements.txt
+
+COPY app /app/auto_news
+WORKDIR /app/auto_news

news_fetch/app/configuration.py

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+from dataclasses import dataclass
+import os
+import shutil
+import configparser
+import logging
+from datetime import datetime
+from peewee import SqliteDatabase
+from rich.logging import RichHandler
+
+# first things first: logging
+logging.basicConfig(
+    format='%(message)s',
+    level=logging.INFO,
+    datefmt='%H:%M:%S', # add %Y-%m-%d if needed
+    handlers=[RichHandler()]
+    )
+logger = logging.getLogger(__name__)
+
+
+# load config file containing constants and secrets
+parsed = configparser.ConfigParser()
+parsed.read("/app/containerdata/config/news_fetch.config.ini")
+
+if os.getenv("DEBUG", "false") == "true":
+    logger.warning("Found 'DEBUG=true', setting up dummy databases")
+    
+    db_base_path = parsed["DATABASE"]["db_path_dev"]
+    parsed["SLACK"]["archive_id"] = parsed["SLACK"]["debug_id"]
+    parsed["MAIL"]["recipient"] = parsed["MAIL"]["sender"]
+    parsed["DOWNLOADS"]["local_storage_path"] = parsed["DATABASE"]["db_path_dev"]
+else:
+    logger.warning("Found 'DEBUG=false' and running on production databases, I hope you know what you're doing...")
+    db_base_path = parsed["DATABASE"]["db_path_prod"]
+    logger.info("Backing up databases")
+    backup_dst = parsed["DATABASE"]["db_backup"]
+    today = datetime.today().strftime("%Y.%m.%d")
+    shutil.copyfile(
+        os.path.join(db_base_path, parsed["DATABASE"]["chat_db_name"]), 
+        os.path.join(backup_dst, today + "." + parsed["DATABASE"]["chat_db_name"]), 
+        )
+    shutil.copyfile(
+        os.path.join(db_base_path, parsed["DATABASE"]["download_db_name"]), 
+        os.path.join(backup_dst, today + "." + parsed["DATABASE"]["download_db_name"]), 
+        )
+
+
+from utils_storage import models
+
+# Set up the database
+models.set_db(
+    SqliteDatabase(
+        os.path.join(db_base_path, parsed["DATABASE"]["chat_db_name"]),
+        pragmas = {'journal_mode': 'wal'} # mutliple threads can read at once
+    ),
+    SqliteDatabase(
+        os.path.join(db_base_path, parsed["DATABASE"]["download_db_name"]),
+        pragmas = {'journal_mode': 'wal'} # mutliple threads can read at once
+    )
+)

news_fetch/app/runner.py

@@ -0,0 +1,197 @@
+"""Main coordination of other util classes. Handles inbound and outbound calls"""
+import configuration
+models = configuration.models
+from threading import Thread
+import logging
+import os
+logger = logging.getLogger(__name__)
+
+from utils_mail import runner as mail_runner
+from utils_slack import runner as slack_runner
+from utils_worker.workers import CompressWorker, DownloadWorker, FetchWorker, UploadWorker
+
+
+class ArticleWatcher:
+    """Wrapper for a newly created article object. Notifies the coordinator upon change/completition"""
+    def __init__(self, article, thread, **kwargs) -> None:
+        self.article_id = article.id # in case article becomes None at any point, we can still track the article
+        self.article = article
+        self.thread = thread
+
+        self.completition_notifier = kwargs.get("notifier")
+        self.fetch = kwargs.get("worker_fetch", None)
+        self.download = kwargs.get("worker_download", None)
+        self.compress = kwargs.get("worker_compress", None)
+        self.upload = kwargs.get("worker_upload", None)
+
+        self.completition_notified = False
+        # self._download_called = self._compression_called = False
+        self._fetch_completed = self._download_completed = self._compression_completed = self._upload_completed = False
+
+        # first step: gather metadata
+        if self.fetch and self.upload:
+            self.fetch.process(self) # this will call the update_status method
+            self.upload.process(self) # idependent from the rest
+        else: # the full kwargs were not provided, only do a manual run
+            # overwrite update_status() because calls from the workers will result in erros
+            self.update_status = lambda completed: logger.info(f"Completed action {completed}")
+            for w in kwargs.get("workers_manual"):
+                w.process(self)
+
+
+    def update_status(self, completed_action):
+        """Checks and notifies internal completition-status.
+        Article download is complete iff fetch and download were successfull and compression was run
+        """
+        # if self.completition_notified and self._compression_completed and self._fetch_completed and self._download_completed and self._upload_completed, we are done
+        if completed_action == "fetch":
+            self.download.process(self)
+        elif completed_action == "download":
+            self.compress.process(self)
+        elif completed_action == "compress": # last step
+            self.completition_notifier(self.article, self.thread)
+            # triggers action in Coordinator
+        elif completed_action == "upload":
+            # this case occurs when upload was faster than compression
+            pass
+        else:
+            logger.warning(f"update_status called with unusual configuration: {completed_action}")
+
+
+    # ====== Attributes to be modified by the util workers
+    @property
+    def fetch_completed(self):
+        return self._fetch_completed
+
+    @fetch_completed.setter
+    def fetch_completed(self, value: bool):
+        self._fetch_completed = value
+        self.update_status("fetch")
+
+    @property
+    def download_completed(self):
+        return self._download_completed 
+
+    @download_completed.setter
+    def download_completed(self, value: bool):
+        self._download_completed = value
+        self.update_status("download")
+
+    @property
+    def compression_completed(self):
+        return self._compression_completed
+
+    @compression_completed.setter
+    def compression_completed(self, value: bool):
+        self._compression_completed = value
+        self.update_status("compress")
+
+    @property
+    def upload_completed(self):
+        return self._upload_completed
+
+    @upload_completed.setter
+    def upload_completed(self, value: bool):
+        self._upload_completed = value
+        self.update_status("upload")
+
+    def __str__(self) -> str:
+        return f"Article with id {self.article_id}"
+
+
+class Coordinator(Thread):
+    def __init__(self, **kwargs) -> None:
+        """Launcher calls this Coordinator as the main thread to handle connections between the other workers (threaded)."""
+        super().__init__(target = self.launch)
+    
+    def add_workers(self, **kwargs):
+        self.worker_slack = kwargs.pop("worker_slack", None) 
+        self.worker_mail = kwargs.pop("worker_mail", None)
+        # the two above won't be needed in the Watcher
+        self.worker_download = kwargs.get("worker_download", None)
+        self.worker_fetch = kwargs.get("worker_fetch", None)
+        self.worker_compress = kwargs.get("worker_compress", None)
+        self.worker_upload = kwargs.get("worker_upload", None)
+        
+        self.kwargs = kwargs
+
+    def launch(self) -> None:
+        for w in [self.worker_download, self.worker_fetch, self.worker_upload, self.worker_compress]:
+            if not w is None:
+                w.start()
+
+
+    def incoming_request(self, message):
+        """This method is passed onto the slack worker. It gets triggered when a new message is received."""
+        url = message.urls[0] # ignore all the other ones
+        article, is_new = models.ArticleDownload.get_or_create(article_url=url)
+        thread = message.thread
+        thread.article = article
+        thread.save()
+        self.kwargs.update({"notifier" : self.article_complete_notifier})
+
+        if is_new or (article.file_name == "" and article.verified == 0):
+            # check for models that were created but were abandonned. This means they have missing information, most importantly no associated file
+            # this overwrites previously set information, but that should not be too important
+            ArticleWatcher(
+                article,
+                thread,
+                **self.kwargs   
+            )
+
+            # All workers are implemented as a threaded queue. But the individual model requires a specific processing order:
+            # fetch -> download -> compress -> complete
+            # the watcher orchestrates the procedure and notifies upon completition
+            # the watcher will notify once it is sufficiently populated
+        else: # manually trigger notification immediatly
+            logger.info(f"Found existing article {article}. Now sending")
+            self.article_complete_notifier(article, thread)
+
+
+
+    def manual_processing(self, articles, workers):
+        for w in workers:
+            w.start()
+
+        for article in articles:
+            notifier = lambda article: print(f"Completed manual actions for {article}")
+            ArticleWatcher(article, None, workers_manual = workers, notifier = notifier) # Article watcher wants a thread to link article to TODO: handle threads as a kwarg 
+
+    def article_complete_notifier(self, article, thread):
+        if self.worker_slack is None:
+            logger.warning("Not sending slack notifier")
+        else:
+            self.worker_slack.bot_worker.respond_channel_message(thread)
+        if self.worker_mail is None:
+            logger.warning("Not sending mail notifier")
+        else:
+            self.worker_mail.send(article)
+
+
+
+if __name__ == "__main__":
+    coordinator = Coordinator()
+
+
+    if os.getenv("UPLOAD", "false") == "true":
+        articles = models.ArticleDownload.select().where(models.ArticleDownload.archive_url == "").execute()
+        logger.info(f"Launching upload to archive for {len(articles)} articles.")
+        coordinator.manual_processing(articles, [UploadWorker()])
+
+    elif os.getenv("CHECK", "false") == "true":
+        from utils_check import runner as check_runner
+        check_runner.verify_unchecked()
+
+    else: # launch with full action
+        slack_runner = slack_runner.BotRunner(coordinator.incoming_request)
+        kwargs = {
+            "worker_download" : DownloadWorker(),
+            "worker_fetch" : FetchWorker(),
+            "worker_upload" : UploadWorker(),
+            "worker_compress" : CompressWorker(),
+            "worker_slack" : slack_runner,
+            "worker_mail" : mail_runner,
+        }
+        coordinator.add_workers(**kwargs)
+        coordinator.start()
+        slack_runner.start()

news_fetch/app/utils_check/runner.py

@@ -0,0 +1,207 @@
+from rich.console import Console
+from rich.table import Table
+from rich.columns import Columns
+from rich.rule import Rule
+console = Console()
+hline = Rule(style="white")
+
+import os
+import subprocess
+from slack_sdk import WebClient
+import configuration
+models = configuration.models
+
+u_options = {
+    "ENTER" : "Accept PDF as is. It gets marked as verified",
+    "D" : "set languange to DE and set verified",
+    "E" : "set languange to EN and set verified",
+    "O" : "set other language (prompted)",
+    "R" : "set related files (prompted multiple times)",
+    "B" : "reject and move to folder BAD",
+    "L" : "leave file as is, do not send reaction"
+}
+
+
+bot_client = WebClient(
+    token = configuration.parsed["SLACK"]["auth_token"]
+)
+
+
+
+
+
+def file_overview(file_url: str, file_attributes: list, options: dict) -> None:
+    """Prints a neat overview of the current article"""
+    file_table = Table(
+        title = file_url,
+        row_styles = ["white", "bright_black"],
+        min_width = 100
+    )
+
+    file_table.add_column("Attribute", justify = "right", no_wrap = True)
+    file_table.add_column("Value set by auto_news")
+    file_table.add_column("Status", justify = "right")
+    for attr in file_attributes:
+        file_table.add_row(attr["name"], attr["value"], attr["status"])
+
+    
+    option_key = "\n".join([f"[[bold]{k}[/bold]]" for k in options.keys()])
+    option_action = "\n".join([f"[italic]{k}[/italic]" for k in options.values()])
+    columns = Columns([option_key, option_action])
+
+    console.print(file_table)
+    console.print("Your options:")
+    console.print(columns)
+
+
+def send_reaction_to_slack_thread(article, reaction):
+    """Sends the verification status as a reaction to the associated slack thread. This will significantly decrease load times of the bot"""
+    thread = article.slack_thread
+    messages = models.Message.select().where(models.Message.text.contains(article.article_url))
+    # TODO rewrite this shit
+    if len(messages) > 5:
+        print("Found more than 5 messages. Aborting reactions...")
+        return
+    for m in messages:
+        if not m.has_single_url:
+            print("Found thread but won't send reaction because thread has multiple urls")
+            pass
+        else:
+            ts = m.slack_ts
+            bot_client.reactions_add(
+                channel=configuration.parsed["SLACK"]["archive_id"],
+                name=reaction,
+                timestamp=ts
+            )
+            print("Sent reaction to message")
+
+
+def prompt_language(query):
+    not_set = True
+    while not_set:
+        uin = input("Set language (nation-code, 2 letters) ")
+        if len(uin) != 2:
+            print("Bad code, try again")
+        else:
+            not_set = False
+            query.language = uin
+            query.save()
+
+
+def prompt_related(query):
+    file_list = []
+    finished = False
+    while not finished:
+        uin = input("Additional file for article? Type '1' to cancel ")
+        if uin == "1":
+            query.set_related(file_list)
+            finished = True
+        else:
+            file_list.append(uin)
+
+
+def prompt_new_fname(query):
+    uin = input("New fname? ")
+    old_fname =  query.file_name
+    query.file_name = uin
+    query.verified = 1
+    if old_fname != "":
+        os.remove(query.save_path + old_fname)
+    query.save()    
+
+
+
+def reject_article(article):
+    article.verified = -1
+    article.save()
+    print("Article marked as bad")
+    # also update the threads to not be monitored anymore
+    send_reaction_to_slack_thread(article, "x")
+
+
+def unreject_article(query):
+    query.verified = 1
+    query.save()
+    # os.rename(badpdf, fname)
+    print("File set to verified")
+
+
+def accept_article(article, last_accepted):
+    article.verified = 1
+    article.save()
+    print("Article accepted as GOOD")
+
+    # also update the threads to not be monitored anymore
+    send_reaction_to_slack_thread(article, "white_check_mark")
+
+    return "" # linked
+
+
+
+
+
+
+def verify_unchecked():
+    query = models.ArticleDownload.select().where(models.ArticleDownload.verified == 0).execute()
+    last_linked = None
+
+    for article in query:
+        console.print(hline)
+        core_info = []
+        for e, name in zip([article.save_path, article.file_name, article.title, article.language], ["Save path", "File name", "Title", "Language"]):
+            entry = {
+                "status" : "[red]██[/red]" if (len(e) == 0 or e == -1) else "[green]██[/green]",
+                "value" : e if len(e) != 0 else "not set",
+                "name" : name
+            }
+            core_info.append(entry)
+        
+        try:
+            # close any previously opened windows:
+            # subprocess.call(["kill", "`pgrep evince`"])
+            os.system("pkill evince")
+            # then open a new one
+            subprocess.Popen(["evince", f"file://{os.path.join(article.save_path, article.file_name)}"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+            # supress evince gtk warnings
+        except Exception as e:
+            print(e)
+            continue
+
+        
+
+        file_overview(
+            file_url = article.article_url, 
+            file_attributes=core_info,
+            options = u_options
+        )
+
+
+        proceed = False
+        while not proceed:
+            proceed = False
+            uin = input("Choice ?").lower()
+            if uin == "":
+                last_linked = accept_article(article, last_linked) # last linked accelerates the whole process
+                proceed = True
+            elif uin == "d":
+                article.language = "de"
+                article.verified = 1
+                article.save()
+                proceed = True
+            elif uin == "e":
+                article.language = "en"
+                article.verified = 1
+                article.save()
+                proceed = True
+            elif uin == "o":
+                prompt_language(article)
+            elif uin == "r":
+                prompt_related(article)
+            elif uin == "b":
+                reject_article(article)
+                proceed = True
+            elif uin == "l":
+                # do nothing
+                proceed = True
+            else:
+                print("Invalid input")

news_fetch/app/utils_mail/runner.py

@@ -0,0 +1,42 @@
+import smtplib
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+from email.mime.application import MIMEApplication
+import os
+import logging
+import configuration
+
+logger = logging.getLogger(__name__)
+config = configuration.parsed["MAIL"]
+
+def send(article_model):
+    mail = MIMEMultipart()
+    mail['Subject'] = "{} -- {}".format(article_model.source_name, article_model.title)
+    mail['From'] = config["sender"]
+    mail['To'] = config["recipient"]
+
+    msgs = article_model.mail_info # this is html
+    msg = [m["reply_text"] for m in msgs]
+    msg = "\n".join(msg)
+
+    content = MIMEText(msg, "html")
+    mail.attach(content)
+
+    files = [m["file_path"] for m in msgs if m["file_path"]]
+    for path in files:
+        with open(path, 'rb') as file:
+            part = MIMEApplication(file.read(), "pdf")
+        # encoders.encode_base64(part)
+        part.add_header('Content-Disposition', 'attachment', filename=os.path.basename(path))
+        mail.attach(part)
+
+    try:
+        smtp = smtplib.SMTP(config["smtp_server"], config["port"])
+        smtp.starttls()
+        smtp.login(config["uname"], config["password"])
+        smtp.sendmail(config["sender"], config["recipient"], mail.as_string())
+        smtp.quit()
+        logger.info("Mail successfully sent.")
+    except Exception as e:
+        logger.error("Could not send mail for article {}".format(article_model))
+        logger.info(e)

news_fetch/app/utils_slack/message_helpers.py

@@ -0,0 +1,277 @@
+import logging
+import configuration
+import requests
+import os
+import time
+from threading import Thread
+from slack_sdk.errors import SlackApiError
+
+logger = logging.getLogger(__name__)
+config = configuration.parsed["SLACK"]
+models = configuration.models
+slack_client = "dummy"
+LATEST_RECORDED_REACTION = 0
+
+
+def init(client) -> None:
+    global slack_client
+    slack_client = client
+
+    global LATEST_RECORDED_REACTION
+    try:
+        LATEST_RECORDED_REACTION = models.Reaction.select(models.Reaction.id).order_by("id")[-1]
+    except IndexError: #query is actually empty, we have never fetched any messages until now
+        LATEST_RECORDED_REACTION = 0    
+    
+    # fetch all te messages we could have possibly missed
+    logger.info("Querying missed messages, threads and reactions. This can take some time.")
+    fetch_missed_channel_messages() # not threaded
+    t = Thread(target = fetch_missed_channel_reactions) # threaded, runs in background (usually takes a long time)
+    t.start()
+
+    if os.getenv("REDUCEDFETCH", "false") == "true":
+        logger.warning("Only fetching empty threads for bot messages because 'REDUCEDFETCH=true'")
+        fetch_missed_thread_messages(reduced=True)
+    else: # perform both asyncronously
+        fetch_missed_thread_messages()
+    
+
+
+def get_unhandled_messages():
+    """Gets all messages that have not yet been handled, be it by mistake or by downtime
+    As the message handler makes no distinction between channel messages and thread messages,
+    we don't have to worry about them here.
+    """
+
+    threaded_objects = []
+    for t in models.Thread.select():
+        if t.message_count > 1: # if only one message was written, it is the channel message
+            msg = t.last_message
+            if msg.is_by_human:
+                threaded_objects.append(msg)
+            # else don't, nothing to process
+    logger.info(f"Set {len(threaded_objects)} thread-messages as not yet handled.")
+
+
+    channel_objects = [t.initiator_message for t in models.Thread.select() if (t.message_count == 1 and not t.is_fully_processed)]
+    logger.info(f"Set {len(channel_objects)} channel-messages as not yet handled.")
+    
+    reaction_objects = list(models.Reaction.select().where(models.Reaction.id > LATEST_RECORDED_REACTION))
+    logger.info(f"Set {len(reaction_objects)} reactions as not yet handled.")
+    # the ones newer than the last before the fetch
+    
+    all_messages = channel_objects + threaded_objects
+    return all_messages, reaction_objects
+
+
+def fetch_missed_channel_messages():
+    # latest processed message_ts is:
+    presaved = models.Message.select().order_by(models.Message.ts)
+    if not presaved:
+        last_ts = 0
+    else:
+        last_message = presaved[-1]
+        last_ts = last_message.slack_ts
+    
+    result = slack_client.conversations_history(
+        channel=config["archive_id"],
+        oldest=last_ts
+    )
+
+    new_messages = result.get("messages", [])
+    # # filter the last one, it is a duplicate! (only if the db is not empty!)
+    # if last_ts != 0 and len(new_messages) != 0:
+    #     new_messages.pop(-1)
+
+    new_fetches = 0
+    for m in new_messages:
+        # print(m)
+        message_dict_to_model(m)
+        new_fetches += 1
+
+    refetch = result.get("has_more", False)
+    while refetch: # we have not actually fetched them all
+        try:
+            result = slack_client.conversations_history(
+                channel = config["archive_id"],
+                cursor = result["response_metadata"]["next_cursor"],
+                oldest = last_ts
+            ) # fetches 100 messages, older than the [-1](=oldest) element of new_fetches
+            refetch = result.get("has_more", False)
+
+            new_messages = result.get("messages", [])
+            for m in new_messages:
+                message_dict_to_model(m)
+                new_fetches += 1
+        except SlackApiError: # Most likely a rate-limit
+            logger.error("Error while fetching channel messages. (likely rate limit) Retrying in {} seconds...".format(config["api_wait_time"]))
+            time.sleep(config["api_wait_time"])
+            refetch = True
+    
+    logger.info(f"Fetched {new_fetches} new channel messages.")
+
+
+def fetch_missed_thread_messages(reduced=False):
+    """After having gotten all base-threads, we need to fetch all their replies"""        
+    # I don't know of a better way: we need to fetch this for each and every thread (except if it is marked as permanently solved)
+    logger.info("Starting fetch of thread messages...")
+    if reduced:
+        threads = [t for t in models.Thread.select() if (t.message_count == 1 and not t.is_fully_processed)]
+        # this only fetches completely empty threads, which might be because the bot-message was not yet saved to the db.
+        # once we got all the bot-messages the remaining empty threads will be the ones we need to process.
+    else:
+        threads = [t for t in models.Thread.select() if not t.is_fully_processed]
+    logger.info(f"Fetching history for {len(threads)} empty threads")
+    new_messages = []
+    for i,t in enumerate(threads):
+        try:
+            messages = slack_client.conversations_replies(
+                channel = config["archive_id"],
+                ts = t.slack_ts,
+                oldest = t.messages[-1].slack_ts
+            )["messages"]
+        except SlackApiError:
+            logger.error("Hit rate limit while querying threaded messages, retrying in {}s ({}/{} queries elapsed)".format(config["api_wait_time"], i, len(threads)))
+            time.sleep(int(config["api_wait_time"]))
+            messages = slack_client.conversations_replies(
+                channel = config["archive_id"],
+                ts = t.slack_ts,
+                oldest = t.messages[-1].slack_ts
+            )["messages"]
+
+        messages.pop(0) # the first message is the one posted in the channel. We already processed it!
+        
+        for m in messages:
+            # only append *new* messages
+            res = message_dict_to_model(m)
+            if res:
+                new_messages.append(res)
+    logger.info("Fetched {} new threaded messages.".format(len(new_messages)))
+
+
+def fetch_missed_channel_reactions():
+    logger.info("Starting background fetch of channel reactions...")
+    threads = [t for t in models.Thread.select() if not t.is_fully_processed]
+    for i,t in enumerate(threads):
+        try:
+            query = slack_client.reactions_get(
+                channel = config["archive_id"],
+                timestamp = t.slack_ts
+            )
+            reactions = query.get("message", []).get("reactions", []) # default = []
+        except SlackApiError: # probably a rate_limit:
+            logger.error("Hit rate limit while querying reactions. retrying in {}s ({}/{} queries elapsed)".format(config["api_wait_time"], i, len(threads)))
+            time.sleep(int(config["api_wait_time"]))
+            reactions = query.get("message", []).get("reactions", [])
+
+        for r in reactions:
+            reaction_dict_to_model(r, t)
+
+
+
+
+# Helpers for message conversion to db-objects
+def reaction_dict_to_model(reaction, thread=None):
+    if thread is None:
+        m_ts = reaction["item"]["ts"]
+        message = models.Message.get(ts = float(m_ts))
+        thread = message.thread
+    if "name" in reaction.keys(): # fetched through manual api query
+        content = reaction["name"]
+    elif "reaction" in reaction.keys(): # fetched through events
+        content = reaction["reaction"]
+    else:
+        logger.error(f"Weird reaction received: {reaction}")
+        return None
+
+    r, _ = models.Reaction.get_or_create(
+        type = content,
+        message = thread.initiator_message
+    )
+    logger.info("Saved reaction [{}]".format(content))
+    return r
+
+
+def message_dict_to_model(message):
+    if message["type"] == "message":
+        thread_ts = message["thread_ts"] if "thread_ts" in message else message["ts"]
+        uid = message.get("user", "BAD USER")
+        if uid == "BAD USER":
+            logger.critical("Message has no user?? {}".format(message))
+            return None
+        
+        user, _ = models.User.get_or_create(user_id = uid)
+        thread, _ = models.Thread.get_or_create(thread_ts = thread_ts)
+        m, new = models.Message.get_or_create(
+            user = user,
+            thread = thread,
+            ts = message["ts"],
+            channel_id = config["archive_id"],
+            text = message["text"]
+        )
+        logger.info(f"Saved: {m} ({'new' if new else 'old'})")
+
+        files = message.get("files", [])
+        if len(files) >= 1:
+            f = files[0] #default: []
+            m.file_type = f["filetype"]
+            m.perma_link = f["url_private_download"]
+            m.save()
+            logger.info(f"Saved {m.file_type}-file for message (id={m.id})")
+        if new:
+            return m
+        else:
+            return None
+    else:
+        logger.warning("What should I do of {}".format(message))
+        return None
+
+
+def say_substitute(*args, **kwargs):
+    logger.info("Now sending message through say-substitute: {}".format(" - ".join(args)))
+    slack_client.chat_postMessage(
+        channel=config["archive_id"],
+        text=" - ".join(args),
+        **kwargs
+    )
+    
+
+def save_as_related_file(url, article_object):
+    r = requests.get(url, headers={"Authorization": "Bearer {}".format(slack_client.token)})
+    saveto = article_object.save_path
+    ftype = url[url.rfind(".") + 1:]
+    fname = "{} - related no {}.{}".format(
+        article_object.file_name.replace(".pdf",""),
+        len(article_object.related) + 1,
+        ftype
+    )
+    with open(os.path.join(saveto, fname), "wb") as f:
+        f.write(r.content)
+    article_object.set_related([fname])
+    logger.info("Added {} to model {}".format(fname, article_object))
+    return fname
+
+
+def react_file_path_message(fname, article_object):
+    saveto = article_object.save_path
+    file_path = os.path.join(saveto, fname)
+    if os.path.exists(file_path):
+        article_object.set_related([fname])
+        logger.info("Added {} to model {}".format(fname, article_object))
+        return True
+    else:
+        return False
+
+
+def is_message_in_archiving(message) -> bool:
+    if isinstance(message, dict):
+        return message["channel"] == config["archive_id"]
+    else:
+        return message.channel_id == config["archive_id"]
+
+
+def is_reaction_in_archiving(event) -> bool:
+    if isinstance(event, dict):
+        return event["item"]["channel"] == config["archive_id"]
+    else:
+        return event.message.channel_id == config["archive_id"]

news_fetch/app/utils_slack/runner.py

@@ -0,0 +1,184 @@
+from slack_bolt import App
+from slack_bolt.adapter.socket_mode import SocketModeHandler
+
+import logging
+import configuration
+
+from . import message_helpers
+
+
+config = configuration.parsed["SLACK"]
+models = configuration.models
+
+class BotApp(App):
+    logger = logging.getLogger(__name__)
+
+    def __init__(self, callback, *args, **kwargs):
+
+        super().__init__(*args, **kwargs)
+        self.callback = callback
+
+    def start(self):
+        message_helpers.init(self.client)
+        missed_messages, missed_reactions = message_helpers.get_unhandled_messages()
+
+        [self.handle_incoming_message(m) for m in missed_messages]
+        [self.handle_incoming_reaction(r) for r in missed_reactions]
+
+        # self.react_missed_reactions(missed_reactions)
+        # self.react_missed_messages(missed_messages)
+        self.startup_status()
+
+
+
+    def handle_incoming_reaction(self, reaction):
+        if isinstance(reaction, dict): #else: the reaction is already being passed as a model
+            # CAUTION: filter for 'changed reactions' those are nasty (usually when adding an url)
+            reaction = message_helpers.reaction_dict_to_model(reaction)
+
+        thread = reaction.message.thread
+        article_object = thread.article
+        if not article_object is None:
+            reaction = reaction.type
+            status = 1 if reaction == "white_check_mark" else -1
+
+            # self.logger.info(f"Applying reaction {reaction} to its root message.")
+            article_object.verified = status
+            article_object.save()
+
+
+    def handle_incoming_message(self, message):
+        """Reacts to all messages inside channel archiving. Must then
+        distinguish between threaded replies and new requests
+        and react accordingly"""
+        if isinstance(message, dict): #else: the message is already being passed as a model
+            # CAUTION: filter for 'changed messages' those are nasty (usually when adding an url)
+            if message.get("subtype", "not bad") == "message_changed":
+                return False
+            message = message_helpers.message_dict_to_model(message)
+
+        # First check: belongs to thread?
+        is_threaded = message.thread.message_count > 1 and message != message.thread.initiator_message
+        if is_threaded:
+            self.incoming_thread_message(message)
+        else:
+            self.incoming_channel_message(message)
+            
+
+    def incoming_thread_message(self, message):
+        if message.user.user_id == config["bot_id"]:
+            return True # ignore the files uploaded by the bot. We handled them already!
+        
+        thread = message.thread
+        if thread.is_fully_processed:
+            return True
+
+        self.logger.info("Receiving thread-message")
+        self.respond_thread_message(message)
+
+
+    def incoming_channel_message(self, message):
+        self.logger.info(f"Handling message {message} ({len(message.urls)} urls)")
+
+        if not message.urls: # no urls in a root-message => IGNORE
+            message.is_processed_override = True
+            message.save()
+            return
+
+        # ensure thread is still empty, this is a scenario encountered only in testing, but let's just filter it
+        if message.thread.message_count > 1:
+            self.logger.info("Discarded message because it is actually processed.")
+            return
+        
+        if len(message.urls) > 1:
+            message_helpers.say_substitute("Only the first url is being handled. Please send any subsequent url as a separate message", thread_ts=message.thread.slack_ts)
+        
+        self.callback(message)
+        # for url in message.urls:
+            # self.callback(url, message)
+            # stop here!
+
+
+
+    def respond_thread_message(self, message, say=message_helpers.say_substitute):
+        thread = message.thread
+        article = thread.article
+        if message.perma_link: # file upload means new data    
+            fname = message_helpers.save_as_related_file(message.perma_link, article)
+            say("File was saved as 'related file' under `{}`.".format(fname),
+                thread_ts=thread.slack_ts
+            )
+        else: # either a pointer to a new file (too large to upload), or trash
+            success = message_helpers.react_file_path_message(message.text, article)
+            if success:
+                say("File was saved as 'related file'", thread_ts=thread.slack_ts)
+            else:
+                self.logger.error("User replied to thread {} but the response did not contain a file/path".format(thread))
+                say("Cannot process response without associated file.",
+                    thread_ts=thread.slack_ts
+                )
+
+
+    def respond_channel_message(self, thread, say=message_helpers.say_substitute):
+        article = thread.article
+        answers = article.slack_info
+        for a in answers:
+            if a["file_path"]:
+                try: # either, a["file_path"] does not exist, or the upload resulted in an error
+                    self.client.files_upload(
+                        channels = config["archive_id"],
+                        initial_comment = f"<@{config['responsible_id']}> \n {a['reply_text']}",
+                        file = a["file_path"],
+                        thread_ts = thread.slack_ts
+                    )
+                    status = True
+                except:
+                    say(
+                        "File {} could not be uploaded.".format(a),
+                        thread_ts=thread.slack_ts
+                    )
+                    status = False
+            else: # anticipated that there is no file!
+                say(
+                    f"<@{config['responsible_id']}> \n {a['reply_text']}",
+                    thread_ts=thread.slack_ts
+                )
+                status = True
+        
+
+    def startup_status(self):
+        threads = [t for t in models.Thread.select()]
+        all_threads = len(threads)
+        fully_processed = len([t for t in threads if t.is_fully_processed])
+        fully_unprocessed = len([t for t in threads if t.message_count == 1])
+        articles_unprocessed = len(models.ArticleDownload.select().where(models.ArticleDownload.verified < 1))
+        self.logger.info(f"[bold]STATUS[/bold]: Fully processed {fully_processed}/{all_threads} threads. {fully_unprocessed} threads have 0 replies. Article-objects to verify: {articles_unprocessed}", extra={"markup": True})
+
+
+    
+
+
+class BotRunner():
+    """Stupid encapsulation so that we can apply the slack decorators to the BotApp"""
+    def __init__(self, callback, *args, **kwargs) -> None:
+        self.bot_worker = BotApp(callback, token=config["auth_token"])
+
+        @self.bot_worker.event(event="message", matchers=[message_helpers.is_message_in_archiving])
+        def handle_incoming_message(message, say):
+            return self.bot_worker.handle_incoming_message(message)
+
+        @self.bot_worker.event(event="reaction_added", matchers=[message_helpers.is_reaction_in_archiving])
+        def handle_incoming_reaction(event, say):
+            return self.bot_worker.handle_incoming_reaction(event)
+
+        # target = self.launch
+        # super().__init__(target=target)
+
+
+    def start(self):
+        self.bot_worker.start()
+        SocketModeHandler(self.bot_worker, config["app_token"]).start()
+
+
+    # def respond_to_message(self, message):
+    #     self.bot_worker.handle_incoming_message(message)

news_fetch/app/utils_storage/migrations/migration.001.py

@@ -0,0 +1,67 @@
+from playhouse.migrate import *
+
+
+"""
+This migration assumes that downloads.db kept the exact same structure as before.
+messages.db should drop the table articlemodelreference in favor of a new field article in the thread-table
+Since each thread is constrained to exactly one article this makes the most sense.
+
+This migration assumes that messages.db gets a new field in the table thread:
+id  |   thread_ts | article_id
+
+We now need to migrate from the table articlemodelreference and then delete it.
+"""
+
+
+db = SqliteDatabase("/code/.dev/messages.db")
+migrator = SqliteMigrator(db)
+
+
+article_field = IntegerField(null=True)
+
+
+migrate(
+    migrator.add_column('thread', 'article_id', article_field),
+    # migrator.drop_column('some_table', 'old_column'),
+)
+
+
+
+# these are the old models, adapted to the migration
+
+class BaseModel(Model):
+    class Meta:
+        database = db
+
+class User(BaseModel):
+    user_id = CharField(default='', unique=True)   
+
+class Thread(BaseModel):
+    """The threads that concern us are only created if the messages that contain urls"""
+    thread_ts = FloatField(default = 0)
+    article_id = IntegerField(null=True)
+
+    
+class Message(BaseModel):
+    ts = FloatField(unique=True) #for sorting
+    channel_id = CharField(default='')
+    user = ForeignKeyField(User, backref="messages")
+    text = TextField(default='')
+    thread = ForeignKeyField(Thread, backref="messages", default=None)
+    file_type = CharField(default='')
+    perma_link = CharField(default='')
+    is_processed_override = BooleanField(default=False)
+
+
+class ArticleModelReference(BaseModel):
+    message = ForeignKeyField(Message, backref='article_model_references')
+    article_model_id = IntegerField(default = 0)
+
+
+
+
+for ref in ArticleModelReference.select():
+    ref.message.thread.article_id = ref.article_model_id
+    ref.message.thread.save()
+
+db.drop_tables((ArticleModelReference))

news_fetch/app/utils_storage/models.py

@@ -0,0 +1,322 @@
+import logging
+logger = logging.getLogger(__name__)
+
+from peewee import *
+import os
+import markdown
+import re
+import configuration
+import datetime
+
+config = configuration.parsed["DOWNLOADS"]
+slack_config = configuration.parsed["SLACK"]
+
+## Helpers
+chat_db = DatabaseProxy()
+download_db = DatabaseProxy()
+
+# set the nature of the db at runtime
+
+class DownloadBaseModel(Model):
+    class Meta:
+        database = download_db
+
+class ChatBaseModel(Model):
+    class Meta:
+        database = chat_db
+
+
+
+## == Article related models == ##
+class ArticleDownload(DownloadBaseModel):
+    title = CharField(default='')
+    pub_date = DateField(default = '')
+    download_date = DateField(default = datetime.date.today)
+    source_name = CharField(default = '')
+    article_url = TextField(default = '', unique=True)
+    archive_url = TextField(default = '')
+    file_name = TextField(default = '')
+    language = CharField(default = '')
+    summary = TextField(default = '')
+    comment = TextField(default = '')
+    verified = IntegerField(default = False)
+    # authors
+    # keywords
+    # ... are added through foreignkeys
+
+    def __str__(self) -> str:
+        return f"ART [{self.title} -- {self.source_name}]"
+
+    ## Useful Properties
+    @property
+    def save_path(self):
+        return f"{config['local_storage_path']}/{self.download_date.year}/{self.download_date.strftime('%B')}/"
+
+    def fname_nas(self, file_name=""):
+        if self.download_date:
+            if file_name:
+                return "NAS: {}/{}/{}/{}".format(config["remote_storage_path"], self.download_date.year, self.download_date.strftime("%B"), file_name)
+            else: # return the self. name
+                return "NAS: {}/{}/{}/{}".format(config["remote_storage_path"], self.download_date.year, self.download_date.strftime("%B"), self.file_name)
+        else:
+            return None
+
+    @property
+    def fname_template(self):
+        if "youtube.com" in self.source_name or "youtu.be" in self.source_name:
+            fname = "{} -- {}".format(self.source_name, self.title)
+        else:
+            fname = "{} -- {}.pdf".format(self.source_name, self.title)
+        return clear_path_name(fname)
+
+    @property
+    def is_title_bad(self):  # add incrementally
+        return "PUR-Abo" in self.title \
+            or "Redirecting" in self.title \
+            or "Error while running fetch" in self.title
+            
+    @property
+    def slack_info(self):
+        status = [":x: No better version available", ":gear: Verification pending", ":white_check_mark: Verified by human"][self.verified + 1]
+        content = "\n>" + "\n>".join(self.summary.split("\n"))
+        file_status, msg = self.file_status()
+        if not file_status:
+            return [msg]
+        
+        # everything alright: generate real content
+        # first the base file
+        if self.file_name[-4:] == ".pdf":
+            answer = [{ # main reply with the base pdf
+                "reply_text" : f"*{self.title}*\n{status}\n{content}",
+                "file_path" : self.save_path + self.file_name 
+            }]
+        else: # don't upload if the file is too big!
+            location = "Not uploaded to slack, but the file will be on the NAS:\n`{}`".format(self.fname_nas())
+            answer = [{ # main reply with the base pdf
+                "reply_text" : "*{}*\n{}\n{}\n{}".format(self.title, status, content, location),
+                "file_path" : None 
+            }]
+
+        # then the related files
+        rel_text = ""
+        for r in self.related:
+            fname = r.related_file_name
+            lentry = "\n• `{}` ".format(self.fname_nas(fname))
+            if fname[-4:] == ".pdf": # this is a manageable file, directly upload
+                f_ret = self.save_path + fname
+                answer.append({"reply_text":"", "file_path" : f_ret})
+            else: # not pdf <=> too large. Don't upload but mention its existence
+                lentry += "(not uploaded to slack, but the file will be on the NAS)"
+                
+            rel_text += lentry
+
+        if rel_text:
+            rel_text = answer[0]["reply_text"] = answer[0]["reply_text"] + "\nRelated files:\n" + rel_text
+        
+        return answer
+
+    @property
+    def mail_info(self):
+        base = [{"reply_text": "[{}]({})\n".format(self.article_url, self.article_url), "file_path":None}] + self.slack_info
+        return [{"reply_text": markdown.markdown(m["reply_text"]), "file_path": m["file_path"]} for m in base]
+
+
+    ## Helpers
+    def set_keywords(self, keywords):
+        for k in keywords:
+            ArticleKeyword.create(
+                article = self,
+                keyword = k
+                )
+
+    def set_authors(self, authors):
+        for a in authors:
+            ArticleAuthor.create(
+                article = self,
+                author = a
+                )
+
+    def set_references(self, references):
+        for r in references:
+            ArticleReference.create(
+                article = self,
+                reference_url = r
+            )
+
+    def set_related(self, related):
+        for r in related:
+            ArticleRelated.create(
+                article = self,
+                related_file_name = r
+            )
+
+    def file_status(self):
+        if not self.file_name:
+            logger.error("Article {} has no filename!".format(self))
+            return False, {"reply_text": "Download failed, no file was saved.", "file_path": None}
+        
+        file_path_abs = self.save_path + self.file_name
+        if not os.path.exists(file_path_abs):
+            logger.error("Article {} has a filename, but the file does not exist at that location!".format(self))
+            return False, {"reply_text": "Can't find file. Either the download failed or the file was moved.", "file_path": None}
+
+        return True, {}
+
+
+class ArticleKeyword(DownloadBaseModel):
+    # instance gets created for every one keyword -> flexible in size
+    article = ForeignKeyField(ArticleDownload, backref='keywords')
+    keyword = CharField()
+
+
+class ArticleAuthor(DownloadBaseModel):
+    article = ForeignKeyField(ArticleDownload, backref='authors')
+    author = CharField()
+
+
+class ArticleReference(DownloadBaseModel):
+    article = ForeignKeyField(ArticleDownload, backref='references')
+    reference_url = TextField(default = '')
+
+
+class ArticleRelated(DownloadBaseModel):
+    article = ForeignKeyField(ArticleDownload, backref='related')
+    related_file_name = TextField(default = '')
+
+
+
+
+## == Slack-thread related models == ##
+class User(ChatBaseModel):
+    user_id = CharField(default='', unique=True)
+    # messages
+
+
+class Thread(ChatBaseModel):
+    """The threads that concern us are only created if the base massage contains a url"""
+    thread_ts = FloatField(default = 0)
+    article = ForeignKeyField(ArticleDownload, backref="slack_thread", null=True, default=None)
+    # provides, ts, user, models
+    # messages
+
+    @property
+    def slack_ts(self):
+        str_ts = str(self.thread_ts)
+        cut_zeros = 6 - (len(str_ts) - str_ts.find(".") - 1) # usually there a 6 decimals. If there are less, problem!
+        return "{}{}".format(str_ts, cut_zeros*"0")
+
+    @property
+    def initiator_message(self):
+        try:
+            return self.messages[0] # TODO check if this needs sorting
+        except IndexError:
+            logger.warning(f"Thread {self} is empty. How can that be?")
+            return None
+
+    @property
+    def message_count(self):
+        # logger.warning("message_count was called")
+        return self.messages.count()
+
+    @property
+    def last_message(self):
+        messages = Message.select().where(Message.thread == self).order_by(Message.ts) # can't be empty by definition/creation
+        return messages[-1]
+
+    @property
+    def is_fully_processed(self) -> bool:
+        init_message = self.initiator_message
+        if init_message is None:
+            return False
+        
+        if init_message.is_processed_override:
+            return True
+        # this override is set for instance, when no url was sent at all. Then set this thread to be ignored
+        
+        reactions = init_message.reaction
+        if not reactions:
+            return False
+        else:
+            r = reactions[0].type # can and should only have one reaction
+            return r == "white_check_mark" \
+                or r == "x"
+
+
+    
+class Message(ChatBaseModel):
+    ts = FloatField(unique=True) #for sorting
+    channel_id = CharField(default='')
+    user = ForeignKeyField(User, backref="messages")
+    text = TextField(default='')
+    thread = ForeignKeyField(Thread, backref="messages", default=None)
+    file_type = CharField(default='')
+    perma_link = CharField(default='')
+    is_processed_override = BooleanField(default=False)
+    # reaction
+
+    def __str__(self) -> str:
+        return "MSG [{}]".format(self.text[:min(len(self.text), 30)].replace('\n','/') + '...')
+
+    @property
+    def slack_ts(self):
+        str_ts = str(self.ts)
+        cut_zeros = 6 - (len(str_ts) - str_ts.find(".") - 1) # usually there a 6 decimals. If there are less, problem!
+        return "{}{}".format(str_ts, cut_zeros * "0")
+
+
+    @property
+    def urls(self):
+        pattern = r"<(.*?)>"
+        matches = re.findall(pattern, self.text)
+        matches = [m for m in matches if "." in m]
+        
+        new_matches = []
+        for m in matches:
+            if "." in m:  # must contain a tld, right?
+                # further complication: slack automatically abreviates urls in the format: 
+                # <url|link preview>. Lucky for us, "|" is a character derecommended in urls, meaning we can "safely" split for it and retain the first half
+                if "|" in m:
+                    keep = m.split("|")[0]
+                else:
+                    keep = m
+                new_matches.append(keep)
+        return new_matches
+    
+    @property
+    def is_by_human(self):
+        return self.user.user_id != slack_config["bot_id"]
+
+    
+    @property
+    def has_single_url(self):
+        return len(self.urls) == 1
+
+
+class Reaction(ChatBaseModel):
+    type = CharField(default = "")
+    message = ForeignKeyField(Message, backref="reaction")
+
+
+
+
+
+
+
+
+def create_tables():
+    with download_db:
+        download_db.create_tables([ArticleDownload, ArticleKeyword, ArticleAuthor, ArticleReference, ArticleRelated])
+    with chat_db:
+        chat_db.create_tables([User, Message, Thread, Reaction])
+
+
+def set_db(chat_db_object, download_db_object):
+    chat_db.initialize(chat_db_object)
+    download_db.initialize(download_db_object)
+    create_tables()
+
+def clear_path_name(path):
+    keepcharacters = (' ','.','_', '-')
+    converted = "".join([c if (c.isalnum() or c in keepcharacters) else "_" for c in path]).rstrip()
+    return converted
+    

news_fetch/app/utils_worker/compress/runner.py

@@ -0,0 +1,47 @@
+import os
+import subprocess
+from pathlib import Path
+
+import logging
+logger = logging.getLogger(__name__)
+import configuration
+config = configuration.parsed["DOWNLOADS"]
+
+shrink_sizes = []
+
+def shrink_pdf(article):
+    article_loc = Path(article.save_path) / article.file_name
+    initial_size = article_loc.stat().st_size
+    compressed_tmp = Path(config['default_download_path']) / "compressed.pdf"
+
+    if article_loc.suffix != "pdf":
+        return article # it probably was a youtube video
+        
+    c = subprocess.run(
+        [
+            "gs",
+            "-sDEVICE=pdfwrite",
+            "-dPDFSETTINGS=/screen",
+            "-dNOPAUSE",
+            "-dBATCH",
+            f"-sOutputFile={compressed_tmp}", 
+            f"{article_loc}"
+        ],
+        stdout=subprocess.PIPE, stderr=subprocess.PIPE
+    )
+
+    if c.returncode == 0:
+        try:
+            os.replace(compressed_tmp, article_loc)
+        except OSError as e:
+            logger.error(f"Compression ran but I could not copy back the file {e}")
+
+        final_size = article_loc.stat().st_size
+        shrink_sizes.append(initial_size - final_size)
+        logger.info(f"Compression worked. Avg shrinkage: {int(sum(shrink_sizes)/len(shrink_sizes) / 1000)} KB")
+
+
+    else:
+        logger.error(f"Could not run the compression! {c.stderr.decode()} - {c.stdout.decode()}")
+    
+    return article

news_fetch/app/utils_worker/download/browser.py

@@ -0,0 +1,172 @@
+import time
+import datetime
+import logging
+import os
+import base64
+import requests
+from selenium import webdriver
+import configuration
+import json
+
+config = configuration.parsed["DOWNLOADS"]
+blacklisted = json.loads(config["blacklisted_href_domains"])
+
+
+class PDFDownloader:
+    """Saves a given url. Fills the object it got as a parameter"""
+    logger = logging.getLogger(__name__)
+    # status-variable for restarting:
+    running = False
+    
+    def start(self):
+        self.finish() # clear up
+            
+        options = webdriver.FirefoxOptions()
+        options.profile = config["browser_profile_path"]
+        # should be options.set_preference("profile", config["browser_profile_path"]) as of selenium 4 but that doesn't work
+
+        if os.getenv("HEADLESS", "false") == "true":
+            options.add_argument('--headless')
+        else:
+            self.logger.warning("Opening browser GUI because of 'HEADLESS=false'")
+
+        options.set_preference('print.save_as_pdf.links.enabled', True)
+        # Just save if the filetype is pdf already, does not work!
+
+        options.set_preference("print.printer_Mozilla_Save_to_PDF.print_to_file", True)
+        options.set_preference("browser.download.folderList", 2)
+        # options.set_preference("browser.helperApps.neverAsk.saveToDisk", "application/pdf")
+        # options.set_preference("pdfjs.disabled", True)
+        options.set_preference("browser.download.dir", config["default_download_path"])
+
+        self.logger.info("Starting gecko driver")
+        # self.driver = webdriver.Firefox(
+        #     options = options,
+        #     service = webdriver.firefox.service.Service(
+        #         log_path = f'{config["local_storage_path"]}/geckodriver.log'
+        # ))
+        self.driver = webdriver.Remote(
+            command_executor = 'http://geckodriver:4444',
+            options = options,
+            # can't set log path...
+        )
+        
+        residues = os.listdir(config["default_download_path"])
+        for res in residues:
+            os.remove(os.path.join(config["default_download_path"], res))
+
+        self.running = True
+
+    def autostart(self):
+        if not self.running:
+            self.start()  # relaunch the dl util
+
+    def finish(self):
+        if self.running:
+            self.logger.info("Exiting gecko driver")
+            try:
+                self.driver.quit()
+                time.sleep(10)
+            except:
+                self.logger.critical("Connection to the driver broke off")
+            self.running = False
+        else:
+            self.logger.info("Gecko driver not yet running")
+
+    def download(self, article_object):
+        sleep_time = 2
+        self.autostart()
+        url = article_object.article_url
+
+        try:
+            self.driver.get(url)
+        except Exception as e:
+            self.logger.critical("Selenium .get(url) failed with error {}".format(e))
+            self.finish()
+            return article_object  # without changes
+        
+        time.sleep(sleep_time)
+        # leave the page time to do any funky business
+
+        # in the mean time, get a page title if required
+        if article_object.is_title_bad:
+            article_object.title = self.driver.title.replace(".pdf", "")
+            # will be propagated to the saved file (dst) as well
+
+        fname = article_object.fname_template
+        dst = os.path.join(article_object.save_path, fname)
+        if os.path.exists(dst):
+            fname = make_path_unique(fname)
+            dst = os.path.join(article_object.save_path, fname)
+
+
+        if url[-4:] == ".pdf":
+            # according to the browser preferences, calling the url will open pdfjs.
+            # If not handled separately, printing would require the ctrl+p route, but setup is janky to say the least
+            success = self.get_exisiting_pdf(url, dst)
+        else:
+            success = self.get_new_pdf(dst)
+
+
+        if success:
+            article_object.file_name = fname
+            article_object.set_references(self.get_references())
+        else:
+            article_object.file_name = ""
+        
+        return article_object  # this change is saved later by the external caller
+
+
+    def get_exisiting_pdf(self, url, dst):
+        try:
+            r = requests.get(url)
+            bytes = r.content
+        except:
+            return False
+        return self.get_new_pdf(dst, other_bytes=bytes)
+
+
+    def get_new_pdf(self, dst, other_bytes=None):
+        os.makedirs(os.path.dirname(dst), exist_ok=True)
+
+        if other_bytes is None:
+            try:
+                result = self.driver.print_page()
+                bytes = base64.b64decode(result, validate=True)
+            except:
+                self.logger.error("Failed, probably because the driver went extinct.")
+                return False
+        else:
+            bytes = other_bytes
+
+        try:
+            with open(dst, "wb+") as f:
+                f.write(bytes)
+            return True
+        except Exception as e:
+            self.logger.error(f"Failed, because of FS-operation: {e}")
+            return False
+        
+
+    def get_references(self):
+        try:
+            hrefs = [e.get_attribute("href") for e in self.driver.find_elements_by_xpath("//a[@href]")]
+        except:
+            hrefs = []
+        len_old = len(hrefs)
+        hrefs = [h for h in hrefs \
+            if not sum([(domain in h) for domain in blacklisted]) # sum([True, False, False, False]) == 1 (esp. not 0)
+            ] # filter a tiny bit at least
+        self.logger.info(f"Hrefs filtered (before: {len_old}, after: {len(hrefs)})")
+        return hrefs
+
+
+
+
+
+
+
+def make_path_unique(path):
+    fname, ending = os.path.splitext(path)
+    fname += datetime.datetime.now().strftime("%d-%H%M%S")
+    return fname + ending

news_fetch/app/utils_worker/download/youtube.py

@@ -0,0 +1,51 @@
+from __future__ import unicode_literals
+import youtube_dl
+import os
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class MyLogger(object):
+    def debug(self, msg): pass
+    def warning(self, msg): pass
+    def error(self, msg):
+        logger.error(msg)
+
+
+
+class YouTubeDownloader:
+    def __init__(self) -> None:
+        pass
+
+
+    def post_download_hook(self, ret_code):
+        # print(ret_code)
+        if ret_code['status'] == 'finished':
+            file_loc = ret_code["filename"]
+            fname = os.path.basename(file_loc)
+            self.article_object.file_name = fname
+
+
+    def save_video(self, article_object):
+        """Saves video accoring to url and save path"""
+        self.article_object = article_object
+        url = article_object.article_url
+        logger.info("Saving new video")
+        file_path = os.path.join(article_object.save_path, article_object.fname_template)
+        ydl_opts = {
+            'format': 'best[height<=720]',
+            'outtmpl': f"{file_path}.%(ext)s", # basically the filename from the object, but with a custom extension depending on the download
+            'logger': MyLogger(),
+            'progress_hooks': [self.post_download_hook],
+            'updatetime': False
+        }
+        try:
+            with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+                ydl.download([url])
+                # article file name is updated in self.post_download_hook
+        except Exception as e:
+            logger.error(f"Youtube download crashed: {e}")
+            article_object.file_name = ""
+
+        return article_object

news_fetch/app/utils_worker/fetch/runner.py

@@ -0,0 +1,62 @@
+from newspaper import Article
+from urllib.parse import urlparse
+from htmldate import find_date
+import datetime
+import logging
+logging.getLogger('newspaper').setLevel(logging.ERROR) # quieter logs
+logging.getLogger('urllib').setLevel(logging.ERROR) # quieter logs
+logging.getLogger('urllib3.poolmanager').setLevel(logging.ERROR) # quieter logs
+logging.getLogger('htmldate').setLevel(logging.ERROR) #quieter logs
+logging.getLogger('charset_normalizer').setLevel(logging.ERROR) #quieter logs
+logger = logging.getLogger("fetch")
+
+
+def get_description(article_object):
+    url = article_object.article_url
+    website = urlparse(url).netloc
+    article_object.source_name = website
+
+    try:
+        article_object.pub_date = datetime.datetime.strptime(find_date(url), '%Y-%d-%M')
+    except: # other file types
+        article_object.pub_date = datetime.datetime(year=1900, month=1, day=1)
+
+    try:
+        news_article = Article(url)
+        news_article.download()
+        news_article.parse()
+    except:
+        news_article = object() # fallback value
+
+    try:
+        article_object.title = news_article.title
+    except AttributeError:
+        article_object.title = "Error while running fetch"
+
+    try:
+        if article_object.summary:
+            article_object.summary = news_article.summary
+        elif news_article.text:
+            ind = min(500, len(news_article.text))
+            article_object.summary = news_article.text[:ind] + "..."
+        else:
+            article_object.summary = ""
+    except AttributeError:
+        article_object.summary = ""
+
+    try:
+        article_object.language = news_article.meta_lang
+    except AttributeError:
+        article_object.language = ""
+
+    try:
+        article_object.set_authors(news_article.authors)
+    except AttributeError:
+        pass # list would have been empty anyway
+    
+    try:
+        article_object.set_keywords(news_article.keywords)
+    except AttributeError:
+        pass  # list would have been empty anyway
+    
+    return article_object

news_fetch/app/utils_worker/upload/runner.py

@@ -0,0 +1,20 @@
+import time
+from waybackpy import WaybackMachineSaveAPI # upload to archive.org
+import logging
+logger = logging.getLogger(__name__)
+
+def upload_to_archive(article_object):
+    """uploads to archive.org and returns the archived url"""
+    user_agent = "Mozilla/5.0 (Windows NT 5.1; rv:40.0) Gecko/20100101 Firefox/40.0" # needed?
+    url = article_object.article_url
+    try:
+        wayback = WaybackMachineSaveAPI(url, user_agent)
+        archive_url = wayback.save()
+        # logger.info(f"{url} uploaded to archive successfully")
+        article_object.archive_url = archive_url
+
+    except Exception as e:
+        article_object.archive_url = "Error while uploading: {}".format(e)
+        logger.error(f"Error while generating archive url: {e}")
+
+    return article_object

news_fetch/app/utils_worker/worker_template.py

@@ -0,0 +1,41 @@
+from threading import Thread
+import time
+import logging
+
+
+class TemplateWorker(Thread):
+    """Parent class for any subsequent worker of the article-download pipeline. They should all run in parallel, thus the Thread subclassing"""
+    logger = logging.getLogger(__name__)
+
+    def __init__(self, *args, **kwargs) -> None:
+        target = self._queue_processor # will be executed on Worker.start()
+        group = kwargs.get("group", None)
+        name = kwargs.get("name", None)
+
+        super().__init__(group=group, target=target, name=name)
+        self._article_queue = []
+        self.logger.info(f"Worker thread {self.__class__.__name__} initialized successfully")
+    
+
+    def process(self, article_watcher):
+        self._article_queue.append(article_watcher)#.article_model.article_url)
+
+
+    def _queue_processor(self):
+        """This method is launched by thread.run() and idles when self._article_queue is empty. When an external caller appends to the queue it jumps into action"""
+        while True: # PLEASE tell me if I'm missing an obvious better way of doing this!
+            if len(self._article_queue) == 0:
+                time.sleep(5)
+            else:
+                article_watcher = self._article_queue.pop(0)
+                self.logger.info(f"{self.__class__.__name__} now processing from queue (length: {len(self._article_queue)}) - {article_watcher.article}")
+                self._handle_article(article_watcher)
+                
+
+    def _handle_article(self, article_watcher, action=None):
+        if action is None:
+            self.logger.error("Unoverloaded call of _handle_article(). This should not occur in prod")
+        else:
+            article = article_watcher.article
+            article = action(article) # action updates the article object but does not save the change
+            article.save()

news_fetch/app/utils_worker/workers.py

@@ -0,0 +1,66 @@
+from .worker_template import TemplateWorker
+from .download.browser import PDFDownloader
+from .download.youtube import YouTubeDownloader
+from .fetch.runner import get_description
+from .upload.runner import upload_to_archive as run_upload
+from .compress.runner import shrink_pdf
+
+import time
+import logging
+logger = logging.getLogger(__name__)
+
+class DownloadWorker(TemplateWorker):
+    def __init__(self) -> None:
+        self.dl_runner = PDFDownloader().download
+        self.yt_runner = YouTubeDownloader().save_video
+        super().__init__()
+
+    def _handle_article(self, article_watcher):
+        article = article_watcher.article
+        u = article.article_url
+
+        if "youtu.be/" in u or "youtube.com/" in u:
+            action = self.yt_runner
+        else:
+            action = self.dl_runner
+
+        super()._handle_article(article_watcher, action)
+        article_watcher.download_completed = True
+
+
+
+class FetchWorker(TemplateWorker):
+    def __init__(self) -> None:
+        super().__init__()
+
+    def _handle_article(self, article_watcher):
+        action = get_description # function
+        super()._handle_article(article_watcher, action)
+        article_watcher.fetch_completed = True
+
+
+
+class UploadWorker(TemplateWorker):
+    def __init__(self) -> None:
+        super().__init__()
+    
+
+
+    def _handle_article(self, article_watcher):
+        def action(*args, **kwargs):
+            time.sleep(10) # uploads to archive are throttled to 15/minute, but 5s still triggers a blacklisting
+            return run_upload(*args, **kwargs)
+
+        super()._handle_article(article_watcher, action)
+        article_watcher.upload_completed = True
+
+
+
+class CompressWorker(TemplateWorker):
+    def __init__(self) -> None:
+        super().__init__()
+
+    def _handle_article(self, article_watcher):
+        action = shrink_pdf
+        super()._handle_article(article_watcher, action)
+        article_watcher.compression_completed = True

news_fetch/requirements.txt

@@ -0,0 +1,10 @@
+peewee
+selenium
+# youtube-dl
+git+https://github.com/ytdl-org/youtube-dl.git #non-release version with faster downloads
+waybackpy
+slack_bolt # relies on slack_sdk
+newspaper3k
+htmldate
+markdown
+rich