depot/rust/passgen/src/main.rs

use std::path::PathBuf;

use anyhow::{anyhow, Result};
use chrono::Local;
use clap::{Args, Parser, Subcommand};
use google_walletobjects1::api::{FlightClass, FlightObject};
use serde::Deserialize;
use tokio::try_join;

use passgen::add_to_wallet::{AddToWallet, PassClassIdentifier, PassIdentifier};
use passgen::insert_or_update::*;
use passgen::resolution792::BoardingPass;
use passgen::scanner::scan;
use passgen::service_account::load_service_account;
use passgen::walletobjects::*;

#[derive(Parser)]
#[command(author, version, about, long_about = None, propagate_version = true, subcommand_required = true, arg_required_else_help = true)]
struct Cli {
    #[arg(short, long)]
    service_account_file: Option<PathBuf>,

    #[arg(short, long, default_value = "3388000000022186420")]
    issuer_id: String,

    #[command(subcommand)]
    command: Option<Commands>,
}

#[derive(Subcommand)]
enum Commands {
    /// gets an existing pass
    GetPass(GetPass),

    /// gets an existing class
    GetClass(GetClass),

    /// uploads a class/pass pair, creating it if necessary. A Google Wallet Add link is printed.
    Upload(Upload),

    /// generates a class/pass pair from an image, uploads it, and then prints a Google Wallet Add
    /// link.
    UploadScan(UploadScan),

    /// reads the aztec code out of an image
    Scan {
        /// Path to the image to read.
        image: PathBuf,
    },
}

#[derive(Args)]
struct GetClass {
    #[arg(short, long)]
    object_type: String,

    #[arg(short, long)]
    class_id: String,
}

#[derive(Args)]
struct GetPass {
    #[arg(short, long)]
    object_type: String,

    #[arg(short, long)]
    pass_id: String,
}

#[derive(Args)]
struct Upload {
    #[arg(short, long)]
    class_json: PathBuf,

    #[arg(short, long)]
    pass_json: PathBuf,
}

#[derive(Args)]
struct UploadScan {
    image: PathBuf,
}

async fn load_thing<'a, T: Deserialize<'a>>(path: &PathBuf) -> Result<T> {
    let data = tokio::fs::read(path).await?;
    let mut deser = serde_json::Deserializer::from_reader(data.as_slice());
    let parsed: T = T::deserialize(&mut deser)?;
    Ok(parsed)
}

#[tokio::main]
async fn main() -> Result<()> {
    let cli = Cli::parse();

    let command = cli.command.unwrap();

    if let Commands::Scan { image } = &command {
        println!("{}", scan(image)?);
        return Ok(());
    };

    let service_account_file = cli
        .service_account_file
        .ok_or_else(|| anyhow!("--service-account-file must be set"))?;
    let sa = load_service_account(&service_account_file).await?;

    let hub = google_walletobjects1::Walletobjects::new(
        hyper::Client::builder().build(
            hyper_rustls::HttpsConnectorBuilder::new()
                .with_native_roots()
                .https_or_http()
                .enable_http1()
                .enable_http2()
                .build(),
        ),
        sa.authenticator.clone(),
    );

    match &command {
        Commands::Scan { image: _ } => unreachable!(),
        Commands::GetClass(get) => {
            let class_id: String = if get.class_id.contains('.') {
                get.class_id.clone()
            } else {
                format!("{}.{}", cli.issuer_id, get.class_id)
            };

            let (_, class) = hub.flightclass().get(&class_id).doit().await?;
            println!("{}", serde_json::to_string(&class)?);

            Ok(())
        }
        Commands::GetPass(get) => {
            let pass_id: String = if get.pass_id.contains('.') {
                get.pass_id.clone()
            } else {
                format!("{}.{}", cli.issuer_id, get.pass_id)
            };

            let (_, pass) = hub.flightobject().get(&pass_id).doit().await?;
            println!("{}", serde_json::to_string(&pass)?);

            Ok(())
        }
        Commands::Upload(upload) => {
            let (pass, mut class): (FlightObject, FlightClass) = try_join!(
                load_thing(&upload.pass_json),
                load_thing(&upload.class_json)
            )?;

            // Always reset the class state to "UNDER_REVIEW".
            class.review_status = Some("UNDER_REVIEW".to_string());

            // Try to create the class first...
            insert_or_update_now(&hub.flightclass(), &class).await?;

            // Then the pass...
            insert_or_update_now(&hub.flightobject(), &pass).await?;

            // Now generate the URL.
            println!(
                "{}",
                AddToWallet {
                    service_account_email: sa.service_account_name.to_string(),

                    flight_classes: vec![PassClassIdentifier {
                        id: class.id.clone().unwrap(),
                    }],
                    flight_passes: vec![PassIdentifier {
                        id: pass.id.unwrap(),
                        class_id: class.id.unwrap(),
                    }],
                }
                .to_url(&sa)?
            );

            Ok(())
        }
        Commands::UploadScan(upload_scan) => {
            let scanned = scan(&upload_scan.image)?;
            let boarding_pass =
                BoardingPass::parse(scanned.as_bytes().to_vec(), &Local::now().date_naive())?;
            let (classes, passes) = passes_from_barcode(&cli.issuer_id, boarding_pass)?;

            // Create all the classes.
            insert_or_update_many(&hub.flightclass(), classes).await?;

            // Create all the objects.
            insert_or_update_many(&hub.flightobject(), passes).await?;

            Ok(())
        }
    }
}