From cd13c85c69cf761b2da84ad91af64d23a3568aa5 Mon Sep 17 00:00:00 2001
From: stuebinm
Date: Wed, 9 Feb 2022 02:51:59 +0100
Subject: existential types in rust are weird

… lots and lots of traits …
---
 src/onboard/zugportal.rs | 109 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 src/onboard/zugportal.rs

(limited to 'src/onboard/zugportal.rs')

diff --git a/src/onboard/zugportal.rs b/src/onboard/zugportal.rs
new file mode 100644
index 0000000..0ad6cfd
--- /dev/null
+++ b/src/onboard/zugportal.rs
@@ -0,0 +1,109 @@
+/// implementation of traits to query zugportal.de
+/// (available at least in the Munich S-Bahn, maybe other trains)
+use chrono::{DateTime, Utc};
+use serde::Deserialize;
+
+use crate::onboard;
+use crate::onboard::{OnBoardAPI, OnBoardInfo};
+use crate::{traits::*, travelynx::TrainRef};
+
+pub struct Zugportal {}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Journey {
+  name: String, // the line's name, e.g. S 8
+  no: i64,
+  stops: Vec<Stop>
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Stop {
+  station: Station,
+  status: String, // one of "Normal", ...?
+  track: Track,
+  messages: Vec<String>,
+  arrival_time: Option<DepartureTime>,
+  departure_time: Option<DepartureTime>
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+struct Station {
+  eva_no: String,
+  name: String
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+struct Track {
+  target: String,
+  prediction: String
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+struct DepartureTime {
+  target: DateTime<Utc>,
+  predicted: DateTime<Utc>,
+  time_type: String, // one of REAL, PREVIEW, ..?
+  diff: i64          // diff in minutes?
+                     // NOTE: also sends predictedTimeInMs and targetTimeInMs; these might be unix times
+}
+
+impl IsStation for Stop {
+  fn name(&self) -> &str {
+    &self.station.name
+  }
+
+  fn scheduled_arrival(&self) -> Option<&chrono::DateTime<Utc>> {
+    self.arrival_time.as_ref().map(|t| &t.target)
+  }
+
+  fn real_arrival(&self) -> Option<&chrono::DateTime<Utc>> {
+    self.arrival_time.as_ref().map(|t| &t.predicted)
+  }
+
+  fn ds100(&self) -> &str {
+    "??"
+  }
+}
+
+impl std::fmt::Display for Stop {
+  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    write!(f, "{}", self.station.name)
+  }
+}
+
+impl OnBoardInfo for Journey {
+  fn guess_last_station(&self) -> Option<&dyn IsStation> {
+    todo!()
+  }
+
+  fn get_train_ref(&self) -> TrainRef {
+    TrainRef {
+      _type: self.name.clone(),
+      no: self.no.to_string().clone()
+    }
+  }
+
+  fn stops<'a>(
+    &'a self
+  ) -> Box<dyn std::iter::Iterator<Item = &'a dyn IsStation> + 'a> {
+    Box::new(self.stops.iter().map(|s| s as &dyn IsStation))
+  }
+}
+
+impl OnBoardAPI for Zugportal {
+  fn apiurl(&self) -> &'static str {
+    "https://zugportal.de/prd/zupo-travel-information/api/public/ri/journey"
+  }
+
+  fn request(
+    &self,
+    debug: bool
+  ) -> Result<Box<dyn OnBoardInfo>, serde_json::Error> {
+    onboard::request::<_, Journey>(self, debug)
+  }
+}
-- 
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