91 lines
3.1 KiB
Python
91 lines
3.1 KiB
Python
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from random import randint
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import datetime
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#might as well use the datetime we made in main for consistency
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from main import DATETIME_STR
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# updates the guid given in two places with the RSS file, essential for letting readers know
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# a new picture has been published
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# refrence: https://cyber.harvard.edu/rss/rss.html#ltguidgtSubelementOfLtitemgt
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# also updates pubDate and lastBuildDate
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# finay, updates the image name as well
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def update_rss_feed(rss_file_name):
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rss_file = ""
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with open(rss_file_name, "r") as f:
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rss_file = f.read()
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element_list = rss_file.split('\n')
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items = []
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for el in element_list:
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if "link" in el:
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items.append(el)
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if "guid" in el:
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items.append(el)
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if "enclosure" in el:
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items.append(el)
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if "<lastBuildDate>" in el:
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items.append(el)
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if "<pubDate>" in el:
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items.append(el)
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guid_items = []
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for el in items:
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if "https://onecatper.day#" in el:
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guid_items.append(el)
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hash_located_at = []
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for el in guid_items:
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hash_located_at.append(el.index('#'))
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CLOSING_TAG_LENGTH = 7
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as_char_list = list(items[2])
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for i in range(hash_located_at[0] + 1, len(as_char_list) - CLOSING_TAG_LENGTH):
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as_char_list[i] = str(randint(0, 9))
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new_guid_link_one = "".join(as_char_list)
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as_char_list = list(items[4])
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for i in range(hash_located_at[1] + 1, len(as_char_list) - CLOSING_TAG_LENGTH):
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as_char_list[i] = str(randint(0, 9))
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new_guid_link_two = "".join(as_char_list)
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split_file = rss_file.split("\n")
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old_guid_links = []
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for element in split_file:
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if "https://onecatper.day#" in element:
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old_guid_links.append(element)
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# preppring strings for replacement of the old strings
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# cat image stored in img/
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old_img_link = items[-1].split(" ")
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old_cat_image = old_img_link[-1].split("\"")
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old_cat_image_url = old_cat_image[1]
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new_cat_image_url = f"https://onecatper.day/img/cat{DATETIME_STR}.jpg"
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# storess dates and times in the rss.xml file, needs to be updated for feed to update
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old_last_build_date = items[1]
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old_pub_date = items[3]
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# date and time need to be a specific format
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# don't want to use constant for this, it needs to be formated
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rss_date = datetime.datetime.strftime(datetime.datetime.now(), "%a, %d %b %Y %H:%M:%S -0500")
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# create new date/time links for feed
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new_last_build_date = f"\t\t<lastBuildDate>{rss_date}</lastBuildDate>"
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new_pub_date = f"\t\t\t<pubDate>{rss_date}</pubDate>"
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# replace what is necessary to make the feed update
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rss_file = rss_file.replace(old_guid_links[0], new_guid_link_one)
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rss_file = rss_file.replace(old_guid_links[1], new_guid_link_two)
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rss_file = rss_file.replace(old_cat_image_url, new_cat_image_url)
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rss_file = rss_file.replace(old_last_build_date, new_last_build_date)
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rss_file = rss_file.replace(old_pub_date, new_pub_date)
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# write the changes to disk
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with open(rss_file_name, "w") as f:
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f.write(rss_file)
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update_rss_feed("rss.xml")
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