hacky proof of concept

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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..a1c58ce
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "traveltext"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+ureq = { version = "*", features = ["json", "charset", "native-certs"] }
+clap = { version = "3.0.12", features = [ "derive" ] }
+serde = { version = "1.0.135", features = [ "derive" ] }
+serde_json = "1.0.78"
+colored = "2.0.0"
+chrono = "0.4.19"
+itertools = "0.10.2"
diff --git a/src/iceportal.rs b/src/iceportal.rs
new file mode 100644
index 0000000..1b36556
--- /dev/null
+++ b/src/iceportal.rs
@@ -0,0 +1,67 @@
+use serde::Deserialize;
+use serde_json::Value;
+
+use crate::travelynx::TrainRef;
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct TripInfo {
+    trip: Trip,
+    connection: Option<Value>,
+    selected_route: Option<Value>,
+    active: Option<Value>
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+struct Trip {
+    train_type: String,
+    vzn: String, // train number
+    // some position info here
+    actual_position: u64, // distance along track, presumably
+    stops: Vec<Stop>
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+struct Stop {
+    info: StopInfo,
+    station: Station
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+struct StopInfo {
+    distance_from_start: u64,
+    position_status: String // one of "departed", "future", ... ?
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+struct Station {
+    eva_nr: String,
+    name: String
+}
+
+
+impl TripInfo {
+
+    pub fn guess_last_station (&self) -> Option<String> {
+        let current_pos = self.trip.actual_position;
+        self.trip
+            .stops
+            .iter()
+            .rev()
+            .map(|stop| (stop.info.distance_from_start, stop))
+            .filter(|(dist,_)| dist <= &current_pos)
+            .next()
+            .map(|(_,stop)| stop.station.name.clone())
+    }
+
+    pub fn get_train_ref (&self) -> TrainRef {
+        TrainRef {
+            _type: self.trip.train_type.clone(),
+            no: self.trip.vzn.clone()
+        }
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..a528cec
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,5 @@
+
+
+pub mod types;
+pub mod travelynx;
+pub mod iceportal;
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..12c67a8
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,145 @@
+use clap::{Parser, Subcommand};
+
+use colored::*;
+
+use traveltext::types::*;
+use traveltext::{travelynx::*, iceportal::*};
+
+
+#[allow(non_upper_case_globals)]
+const token: &str = "1387-d942ee22-1d34-4dc2-89b6-5e7ef229fb5e";
+#[allow(non_upper_case_globals)]
+const baseurl: &str = "https://travelynx.de";
+
+
+
+#[derive(Parser)]
+struct Cli {
+    #[clap(subcommand)]
+    command: Command,
+}
+
+#[derive(Subcommand)]
+enum Command {
+    /// Get current travelynx status
+    Status,
+    /// Check in to a train using travelynx
+    Checkin {
+        from: String,
+        to: String,
+        // TODO: make this optional and guess which train if not given
+        #[clap(flatten)]
+        train: TrainRef
+    },
+    /// If iceportal.de is available, ask it which train we're in and
+    /// check in
+    Autocheckin,
+    /// Undo the last checkin (if any).
+    Undo,
+    /// Query iceportal.de (for testing)
+    ICEPortal
+}
+
+
+
+fn main() -> Result<(), ureq::Error> {
+    let cli = Cli::parse();
+
+    let traveltext = format!(
+        "{}{}el{}{}",
+        "tr".cyan(),
+        "av".bright_magenta(),
+        "te".bright_magenta(),
+        "xt".cyan()
+    );
+
+    match cli.command {
+        Command::Status => {
+            let body: Status = ureq::get(&format!("{}/api/v1/status/{}", baseurl, token))
+                .call()
+                // TODO: this prints the token!
+                .unwrap_or_else(|err| exit_err(&err.to_string()))
+                .into_json()
+                .unwrap_or_else(|err| exit_err(&err.to_string()));
+
+            println!("{}: {}", traveltext, body);
+        }
+        Command::Checkin {from, to, train} => {
+            let request = Action::CheckIn {
+                train,
+                from_station: from,
+                to_station: Some(to),
+                comment: None,
+                token: format!("{}", token)
+            };
+
+            // println!("{}", serde_json::to_string(&request).unwrap());
+
+            let resp: Response = ureq::post(&format!("{}/api/v1/travel", baseurl))
+                .send_json(request)
+                .unwrap_or_else(|err| exit_err(&err.to_string()))
+                .into_json()
+                .unwrap_or_else(|err| exit_err(&err.to_string()));
+
+            // eprintln!("{:?}", resp);
+            println!("{}: {}", traveltext, resp);
+        },
+        Command::Undo => {
+            let resp: Response = ureq::post(&format!("{}/api/v1/travel", baseurl))
+                .send_json(Action::Undo {token: token.to_owned()})
+                .unwrap_or_else(|err| exit_err(&err.to_string()))
+                .into_json()
+                .unwrap_or_else(|err| exit_err(&err.to_string()));
+
+            println!("{}: {}", traveltext, resp);
+        },
+        Command::Autocheckin => {
+            let iceportal: TripInfo = ureq::get("https://iceportal.de/api1/rs/tripInfo/trip")
+                .call()?
+                .into_json()
+                .unwrap_or_else(|err| exit_err(&err.to_string()));
+            let last_stop = iceportal.guess_last_station().unwrap();
+            let train = iceportal.get_train_ref();
+            println!(
+                "{}: guessing you got onto {} {} in {}, checking in …",
+                traveltext,
+                train._type,
+                train.no,
+                last_stop
+            );
+            let request = Action::CheckIn {
+                train,
+                from_station: last_stop,
+                to_station: None,
+                comment: None,
+                token: format!("{}", token)
+            };
+
+            // println!("{}", serde_json::to_string(&request).unwrap());
+
+            let resp: Response = ureq::post(&format!("{}/api/v1/travel", baseurl))
+                .send_json(request)
+                .unwrap_or_else(|err| exit_err(&err.to_string()))
+                .into_json()
+                .unwrap_or_else(|err| exit_err(&err.to_string()));
+
+            // eprintln!("{:?}", resp);
+            println!("{}: {}", traveltext, resp);
+
+        },
+        Command::ICEPortal => {
+            let resp: TripInfo = ureq::get("https://iceportal.de/api1/rs/tripInfo/trip")
+                .call()?
+                .into_json()
+                .unwrap_or_else(|err| exit_err(&err.to_string()));
+            println!("{:?}", resp);
+            println!("guessing last stop was: {:?}", resp.guess_last_station());
+        }
+    }
+    Ok(())
+}
+
+fn exit_err(msg: &str) -> ! {
+    eprintln!("{}", msg);
+    std::process::exit(1)
+}
diff --git a/src/travelynx.rs b/src/travelynx.rs
new file mode 100644
index 0000000..0188f32
--- /dev/null
+++ b/src/travelynx.rs
@@ -0,0 +1,64 @@
+use clap::Args;
+use serde::{Serialize, Deserialize};
+use colored::*;
+
+use crate::types::Status;
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Travel {
+    token: String,
+    #[serde(flatten)]
+    action: Action,
+}
+
+#[derive(Serialize, Debug)]
+#[serde(rename_all = "camelCase")]
+#[serde(tag = "action")]
+pub enum Action {
+    #[serde(rename = "checkin")]
+    #[serde(rename_all = "camelCase")]
+    CheckIn {
+        token: String,
+        train: TrainRef,
+        from_station: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        to_station: Option<String>,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        comment: Option<String>,
+    },
+    #[serde(rename = "checkout")]
+    CheckOut {
+        to_station: String,
+        force: bool,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        comment: Option<String>,
+    },
+    Undo {token: String},
+}
+
+#[derive(Args, Serialize, Debug)]
+pub struct TrainRef {
+    #[clap(name = "TRAIN TYPE")]
+    #[serde(rename = "type")]
+    pub _type: String,
+    #[clap(name = "NUMBER")]
+    pub no: String,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct Response {
+    success: Option<bool>,
+    deprecated: bool,
+    status: Status,
+    error: Option<String>
+}
+
+impl std::fmt::Display for Response {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match &self.error {
+            Some(msg) => write!(f, "{}", msg.red()),
+            None => write!(f, "{}\n\n{}", "Success!".green(), self.status)
+        }
+    }
+}
diff --git a/src/types.rs b/src/types.rs
new file mode 100644
index 0000000..3dcb6db
--- /dev/null
+++ b/src/types.rs
@@ -0,0 +1,208 @@
+use serde::{Deserialize, Deserializer};
+
+use chrono::NaiveDateTime;
+use colored::*;
+use itertools::Itertools;
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Station {
+    name: String,
+    ds100: String,
+    uic: u64,
+    latitude: f64,
+    longitude: f64,
+    #[serde(deserialize_with = "naive_read_unixtime")]
+    scheduled_time: NaiveDateTime,
+    #[serde(deserialize_with = "naive_read_unixtime")]
+    real_time: NaiveDateTime,
+}
+
+
+pub fn parse_optional_station<'de, D>(d: D) -> Result<Option<Station>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let val = <serde_json::Value>::deserialize(d)?;
+        match serde_json::from_value(val) {
+            Ok(station) => Ok(Some(station)),
+            Err(_) => Ok(None)
+        }
+}
+
+
+fn naive_read_unixtime<'de, D>(d: D) -> Result<NaiveDateTime, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let ts = <i64>::deserialize(d)?;
+    Ok(NaiveDateTime::from_timestamp(ts, 0))
+}
+fn option_naive_read_unixtime<'de, D>(d: D) -> Result<Option<NaiveDateTime>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    match <i64>::deserialize(d) {
+        Ok(ts) =>
+            Ok(Some(NaiveDateTime::from_timestamp(ts, 0))),
+        Err(_) => Ok(None)
+    }
+}
+
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Stop {
+    name: String,
+    #[serde(deserialize_with = "option_naive_read_unixtime")]
+    scheduled_arrival: Option<NaiveDateTime>,
+    #[serde(deserialize_with = "option_naive_read_unixtime")]
+    real_arrival: Option<NaiveDateTime>,
+    #[serde(deserialize_with = "option_naive_read_unixtime")]
+    scheduled_departure: Option<NaiveDateTime>,
+    #[serde(deserialize_with = "option_naive_read_unixtime")]
+    real_departure: Option<NaiveDateTime>,
+}
+
+trait IsStation {
+    fn name (&self) -> &str;
+    fn scheduled_arrival (&self) -> Option<&NaiveDateTime>;
+    fn real_arrival (&self) -> Option<&NaiveDateTime>;
+    fn ds100 (&self) -> &str;
+
+    fn to_fancy_string (&self) -> String {
+        format!(
+            "{} {} – {} ({})",
+            self.real_arrival().map(|t| t.time().to_string()).unwrap_or("??:??:??".to_string()).blue(),
+            {
+                let delay = match (self.real_arrival(), self.scheduled_arrival()) {
+                    (Some(a), Some(s)) => (a.time() - s.time()).num_minutes(),
+                    _ => 0
+                };
+                let text = format!("({:+})", delay);
+                if delay > 0 {
+                    text.red()
+                } else {
+                    text.green()
+                }
+            },
+            self.ds100().red(),
+            self.name()
+        )
+    }
+}
+
+impl IsStation for Station {
+    fn name (&self) -> &str {
+        &self.name
+    }
+    fn scheduled_arrival (&self) -> Option<&NaiveDateTime> {
+        Some(&self.scheduled_time)
+    }
+    fn real_arrival (&self) -> Option<&NaiveDateTime> {
+        Some(&self.real_time)
+    }
+
+    fn ds100 (&self) -> &str {
+        &self.ds100
+    }
+}
+
+impl IsStation for Stop {
+    fn name (&self) -> &str {
+        &self.name
+    }
+    fn scheduled_arrival (&self) -> Option<&NaiveDateTime> {
+        self.scheduled_arrival.as_ref()
+    }
+    fn real_arrival (&self) -> Option<&NaiveDateTime> {
+        self.real_arrival.as_ref()
+    }
+
+    fn ds100 (&self) -> &str {
+        "[??]"
+    }
+}
+
+
+
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Train {
+    #[serde(rename = "type")]
+    _type: String,
+    line: Option<String>,
+    no: String,
+    id: String,
+}
+
+
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Status {
+    deprecated: bool,
+    checked_in: bool,
+    from_station: Station,
+    #[serde(deserialize_with = "parse_optional_station")]
+    to_station: Option<Station>,
+    intermediate_stops: Vec<Stop>,
+    train: Option<Train>,
+    action_time: u64,
+}
+
+#[allow(dead_code)]
+pub struct Ds100 {
+    inner: String,
+}
+
+struct Trip<'a> (&'a Vec<Stop>);
+
+impl std::fmt::Display for Train {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{} {}", self._type, self.no)
+    }
+}
+
+#[allow(unstable_name_collisions)]
+impl std::fmt::Display for Trip<'_> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        if self.0.len() == 0 {
+            write!(f, "(none)")
+        } else {
+        self.0.iter()
+              .map(|stop| stop.to_fancy_string())
+              .intersperse("  ↓".to_string())
+              .for_each(|l| writeln!(f, "  {}", l).unwrap());
+            Ok(())
+        }
+    }
+}
+
+
+impl std::fmt::Display for Status {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self.checked_in {
+            false => write!(
+                f,
+                "not checked in. \n\n\
+                 last trip: \n  {}\n    ↓\n  {}",
+                self.from_station.to_fancy_string(),
+                self.to_station.as_ref().unwrap().to_fancy_string()
+            ),
+            true => write!(
+                f,
+                "checked in to: {}.\n\n\
+                 stops:\n  {}\n    ↓\n{}    ↓\n  {}",
+                self.train.as_ref().map(|t| t.to_string()).unwrap_or("".to_string()).green(),
+                self.from_station.to_fancy_string(),
+                Trip(&self.intermediate_stops),
+                self.to_station
+                    .as_ref()
+                    .map(|s| s.to_fancy_string())
+                    .unwrap_or_else(|| "🚄 Fahrt ins Blaue".blue().to_string())
+            )
+        }
+    }
+}