This filter converts date/time values into relative time strings such as "an hour ago".
It will be used in later commits. --- app.py | 50 +++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 49 insertions(+), 1 deletion(-)
diff --git a/app.py b/app.py index b4d7e41..0e0564a 100644 --- a/app.py +++ b/app.py @@ -11,10 +11,11 @@ from io import BytesIO import coffee_db as db import time import sys -from datetime import date, timedelta +from datetime import date, timedelta, datetime, timezone
from json import loads from requests import post +import jinja2
db.init_db() app = Flask(__name__) @@ -22,6 +23,53 @@ CORS(app, supports_credentials=True) app.secret_key = b'_5#y2L"F4Q8z\n\xec]/'
+# Inspired by https://shubhamjain.co/til/how-to-render-human-readable-time-in-jinja/, +# updated to our needs +def humanize_ts(time): + """ + Convert date in ISO format to relative, human readable string + like 'an hour ago', 'Yesterday', '3 months ago', + 'just now', etc + """ + if jinja2.is_undefined(time): + return time + now = datetime.now(timezone.utc) + if time[-1] == 'Z': # Convert Zulu time zone to datetime compatible format + time = time[0:-1] + '+00:00' + diff = now - datetime.fromisoformat(time) + second_diff = diff.seconds + day_diff = diff.days + + if day_diff < 0: + return '' + + if day_diff == 0: + if second_diff < 10: + return "just now" + if second_diff < 60: + return str(int(second_diff)) + " seconds ago" + if second_diff < 120: + return "a minute ago" + if second_diff < 3600: + return str(int(second_diff / 60)) + " minutes ago" + if second_diff < 7200: + return "an hour ago" + if second_diff < 86400: + return str(int(second_diff / 3600)) + " hours ago" + if day_diff == 1: + return "Yesterday" + if day_diff < 7: + return str(day_diff) + " days ago" + if day_diff < 31: + return str(int(day_diff / 7)) + " weeks ago" + if day_diff < 365: + return str(int(day_diff / 30)) + " months ago" + return str(int(day_diff / 365)) + " years ago" + + +app.jinja_env.filters['humanize'] = humanize_ts + + @app.route('/') def hello(): if "uid" in session: