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mod game;
mod payload;
mod state;
cfg_if! {
if #[cfg(target_arch = "wasm32")] {
use sabre_sdk::{ApplyError, TpProcessRequest, TransactionContext, TransactionHandler,};
} else {
use sawtooth_sdk::messages::processor::TpProcessRequest;
use sawtooth_sdk::processor::handler::{ApplyError, TransactionContext, TransactionHandler};
}
}
use crate::handler::game::Game;
use crate::handler::payload::XoPayload;
use crate::handler::state::{get_xo_prefix, XoState};
pub struct XoTransactionHandler {
family_name: String,
family_versions: Vec<String>,
namespaces: Vec<String>,
}
impl XoTransactionHandler {
pub fn new() -> XoTransactionHandler {
XoTransactionHandler {
family_name: "xo".into(),
family_versions: vec!["1.0".into()],
namespaces: vec![get_xo_prefix()],
}
}
}
impl TransactionHandler for XoTransactionHandler {
fn family_name(&self) -> String {
self.family_name.clone()
}
fn family_versions(&self) -> Vec<String> {
self.family_versions.clone()
}
fn namespaces(&self) -> Vec<String> {
self.namespaces.clone()
}
fn apply(
&self,
request: &TpProcessRequest,
context: &mut dyn TransactionContext,
) -> Result<(), ApplyError> {
let signer = request.get_header().get_signer_public_key();
let payload = XoPayload::new(request.get_payload())?;
let mut state = XoState::new(context);
info!(
"Payload: {} {} {}",
payload.get_name(),
payload.get_action(),
payload.get_space(),
);
let game = state.get_game(payload.get_name().as_str())?;
match payload.get_action().as_str() {
"delete" => {
if game.is_none() {
return Err(ApplyError::InvalidTransaction(String::from(
"Invalid action: game does not exist",
)));
}
state.delete_game(payload.get_name().as_str())?;
}
"create" => {
if game.is_none() {
let game = Game::new(payload.get_name());
state.set_game(payload.get_name().as_str(), game)?;
info!("Created game: {}", payload.get_name().as_str());
} else {
return Err(ApplyError::InvalidTransaction(String::from(
"Invalid action: Game already exists",
)));
}
}
"take" => {
if let Some(mut g) = game {
match g.get_state().as_str() {
"P1-WIN" | "P2-WIN" | "TIE" => {
return Err(ApplyError::InvalidTransaction(String::from(
"Invalid action: Game has ended",
)));
}
"P1-NEXT" => {
let p1 = g.get_player1();
if !p1.is_empty() && p1.as_str() != signer {
return Err(ApplyError::InvalidTransaction(String::from(
"Not player 2's turn",
)));
}
}
"P2-NEXT" => {
let p2 = g.get_player2();
if !p2.is_empty() && p2.as_str() != signer {
return Err(ApplyError::InvalidTransaction(String::from(
"Not player 1's turn",
)));
}
}
_ => {
return Err(ApplyError::InvalidTransaction(String::from(
"Invalid state",
)));
}
}
let board_chars: Vec<char> = g.get_board().chars().collect();
if board_chars[payload.get_space() - 1] != '-' {
return Err(ApplyError::InvalidTransaction(format!(
"Space {} is already taken",
payload.get_space()
)));
}
if g.get_player1().is_empty() {
g.set_player1(signer);
} else if g.get_player2().is_empty() {
g.set_player2(signer)
}
g.mark_space(payload.get_space())?;
g.update_state()?;
g.display();
state.set_game(payload.get_name().as_str(), g)?;
} else {
return Err(ApplyError::InvalidTransaction(String::from(
"Invalid action: Take requires an existing game",
)));
}
}
other_action => {
return Err(ApplyError::InvalidTransaction(format!(
"Invalid action: '{}'",
other_action
)));
}
}
Ok(())
}
}
#[cfg(target_arch = "wasm32")]
pub fn apply(
request: &TpProcessRequest,
context: &mut dyn TransactionContext,
) -> Result<bool, ApplyError> {
let handler = XoTransactionHandler::new();
match handler.apply(request, context) {
Ok(_) => Ok(true),
Err(err) => {
info!("{}", err);
Err(err)
}
}
}