97 lines
2.5 KiB
Python
Executable file
97 lines
2.5 KiB
Python
Executable file
#!/usr/bin/python3
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import os
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from dataclasses import dataclass
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from datetime import UTC, datetime
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from decimal import Decimal
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import flask
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import lxml.html
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import pytz
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app = flask.Flask(__name__)
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app.debug = True
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data_loc = os.path.expanduser("~/lib/data/eurotunnel")
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def get_filename(direction: str) -> tuple[datetime, str]:
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"""Most recent list of outbound prices."""
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end = f"_{direction}.html"
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most_recent = max([f for f in os.listdir(data_loc) if f.endswith(end)])
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filename = os.path.join(data_loc, most_recent)
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timestamp = most_recent.removesuffix(end)
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dt_utc = datetime.strptime(timestamp, "%Y-%m-%d_%H%M%S").replace(tzinfo=UTC)
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dt = dt_utc.astimezone(pytz.timezone("Europe/London"))
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return (dt, filename)
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@dataclass
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class Train:
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"""Eurostar train."""
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dep: str
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arr: str
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price: Decimal | None = None
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def get_tickets(filename: str) -> list[Train]:
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"""Get trains and prices."""
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tree = lxml.html.parse(filename)
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root = tree.getroot()
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trains = []
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by_time = {}
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for mission in root.findall(".//div[@data-mission]"):
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dep_text = mission.findtext(".//b")
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assert dep_text
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dep = dep_text.replace(":", "")
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arr_text = mission.findtext(".//small")
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assert arr_text
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arr = arr_text.removeprefix("Arrive ").replace(":", "")
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item = Train(dep=dep, arr=arr)
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trains.append(item)
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by_time[dep] = item
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for ticket in root.xpath("//div[contains(@class, 'ticket')]"):
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classes = ticket.get("class").split(" ")
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if "ticket" not in classes:
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continue
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ticket_class = classes[-1]
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if ticket_class != "standard":
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continue
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mission_time = ticket.getparent().getparent().get("data-mission-time")
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onclick = ticket.get("onclick").split(",")
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price = Decimal(onclick[2][1:-1])
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by_time[mission_time].price = price
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return trains
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@app.route("/")
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def index() -> str:
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"""Index."""
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out_ts, out_filename = get_filename("outbound")
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out = get_tickets(out_filename)
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out = [t for t in out if t.dep > "0800" and "0700" < t.arr < "2200"]
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back_ts, back_filename = get_filename("return")
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back = get_tickets(back_filename)
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back = [t for t in back if t.dep > "1100" and "0700" < t.arr < "2200"]
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return flask.render_template(
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"index.html",
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out_ts=out_ts,
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out=out,
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back_ts=back_ts,
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back=back,
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)
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if __name__ == "__main__":
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app.run(host="0.0.0.0")
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