forked from projectmoon/tenebrous-dicebot
Remove unnecessary Option from parse_command return type.
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c55926a005
commit
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@ -1,6 +1,7 @@
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use crate::context::Context;
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use crate::error::BotError;
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use crate::error::{BotError, BotError::CommandParsingError};
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use async_trait::async_trait;
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use parser::CommandParsingError::UnrecognizedCommand;
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use thiserror::Error;
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pub mod basic_rolling;
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@ -45,8 +46,10 @@ pub trait Command: Send + Sync {
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/// parsed correctly. Returns Ok(None) if no command was recognized.
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pub fn parse(s: &str) -> Result<Box<dyn Command>, BotError> {
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match parser::parse_command(s) {
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Ok(Some(command)) => Ok(command),
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Ok(None) => Err(BotError::CommandError(CommandError::IgnoredCommand)),
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Ok(command) => Ok(command),
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Err(CommandParsingError(UnrecognizedCommand(_))) => {
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Err(CommandError::IgnoredCommand.into())
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}
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Err(e) => Err(e),
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}
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}
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@ -19,8 +19,11 @@ use combine::{any, many1, optional, Parser};
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use nom::Err as NomErr;
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use thiserror::Error;
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#[derive(Debug, Clone, Copy, PartialEq, Error)]
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#[derive(Debug, Clone, PartialEq, Error)]
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pub enum CommandParsingError {
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#[error("unrecognized command: {0}")]
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UnrecognizedCommand(String),
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#[error("parser error: {0}")]
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InternalParseError(#[from] combine::error::StringStreamError),
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}
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@ -114,23 +117,21 @@ fn split_command(input: &str) -> Result<(String, String), CommandParsingError> {
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/// Potentially parse a command expression. If we recognize the
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/// command, an error should be raised if the command is misparsed. If
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/// we don't recognize the command, ignore it and return None.
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pub fn parse_command(input: &str) -> Result<Option<Box<dyn Command>>, BotError> {
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pub fn parse_command(input: &str) -> Result<Box<dyn Command>, BotError> {
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match split_command(input) {
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Ok((cmd, cmd_input)) => match cmd.as_ref() {
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"variables" => get_all_variables().map(|command| Some(command)),
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"get" => parse_get_variable_command(&cmd_input).map(|command| Some(command)),
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"set" => parse_set_variable_command(&cmd_input).map(|command| Some(command)),
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"del" => parse_delete_variable_command(&cmd_input).map(|command| Some(command)),
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"r" | "roll" => parse_roll(&cmd_input).map(|command| Some(command)),
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"rp" | "pool" => parse_pool_roll(&cmd_input).map(|command| Some(command)),
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"cthroll" | "cthRoll" => parse_cth_roll(&cmd_input).map(|command| Some(command)),
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"cthadv" | "cthARoll" => {
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parse_cth_advancement_roll(&cmd_input).map(|command| Some(command))
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}
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"chance" => chance_die().map(|command| Some(command)),
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"help" => help(&cmd_input).map(|command| Some(command)),
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"variables" => get_all_variables(),
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"get" => parse_get_variable_command(&cmd_input),
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"set" => parse_set_variable_command(&cmd_input),
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"del" => parse_delete_variable_command(&cmd_input),
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"r" | "roll" => parse_roll(&cmd_input),
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"rp" | "pool" => parse_pool_roll(&cmd_input),
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"cthroll" | "cthRoll" => parse_cth_roll(&cmd_input),
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"cthadv" | "cthARoll" => parse_cth_advancement_roll(&cmd_input),
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"chance" => chance_die(),
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"help" => help(&cmd_input),
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// No recognized command, ignore this.
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_ => Ok(None),
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_ => Err(CommandParsingError::UnrecognizedCommand(cmd).into()),
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},
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//All other errors passed up.
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Err(e) => Err(e.into()),
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