2020-08-27 23:56:19 +00:00
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use crate::cofd::dice::DicePool;
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2020-10-15 16:52:08 +00:00
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use crate::context::Context;
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2020-04-21 03:15:13 +00:00
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use crate::dice::ElementExpression;
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2020-10-15 16:52:08 +00:00
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use crate::error::{BotError, CommandError};
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2020-08-28 22:02:41 +00:00
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use crate::help::HelpTopic;
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2020-04-21 06:09:43 +00:00
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use crate::roll::Roll;
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2020-04-21 03:15:13 +00:00
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pub mod parser;
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2020-04-21 06:07:03 +00:00
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pub struct Execution {
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plain: String,
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html: String,
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2020-04-21 03:15:13 +00:00
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}
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2020-04-21 06:07:03 +00:00
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impl Execution {
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pub fn plain(&self) -> &str {
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&self.plain
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2020-04-21 03:15:13 +00:00
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}
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2020-04-21 06:07:03 +00:00
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pub fn html(&self) -> &str {
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&self.html
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}
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}
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pub trait Command {
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2020-10-15 16:52:08 +00:00
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fn execute(&self, ctx: &Context) -> Execution;
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2020-08-21 21:49:22 +00:00
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fn name(&self) -> &'static str;
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2020-04-21 06:07:03 +00:00
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}
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2020-08-21 21:49:22 +00:00
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pub struct RollCommand(ElementExpression);
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2020-04-21 06:07:03 +00:00
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impl Command for RollCommand {
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2020-08-21 21:49:22 +00:00
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fn name(&self) -> &'static str {
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"roll regular dice"
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}
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2020-10-15 16:52:08 +00:00
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fn execute(&self, _ctx: &Context) -> Execution {
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2020-04-21 06:07:03 +00:00
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let roll = self.0.roll();
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let plain = format!("Dice: {}\nResult: {}", self.0, roll);
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2020-04-21 06:09:43 +00:00
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let html = format!(
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2020-04-22 04:19:15 +00:00
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"<p><strong>Dice:</strong> {}</p><p><strong>Result</strong>: {}</p>",
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2020-04-21 06:09:43 +00:00
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self.0, roll
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);
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Execution { plain, html }
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2020-04-21 03:15:13 +00:00
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}
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}
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2020-08-21 21:49:22 +00:00
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pub struct PoolRollCommand(DicePool);
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impl Command for PoolRollCommand {
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fn name(&self) -> &'static str {
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"roll dice pool"
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}
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2020-10-15 16:52:08 +00:00
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fn execute(&self, _ctx: &Context) -> Execution {
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2020-10-04 21:32:50 +00:00
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let roll_result = self.0.roll();
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let (plain, html) = match roll_result {
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Ok(rolled_pool) => {
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let plain = format!("Pool: {}\nResult: {}", rolled_pool, rolled_pool.roll);
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let html = format!(
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"<p><strong>Pool:</strong> {}</p><p><strong>Result</strong>: {}</p>",
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rolled_pool, rolled_pool.roll
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);
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(plain, html)
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}
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Err(e) => {
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let plain = format!("Error: {}", e);
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let html = format!("<p><strong>Error:</strong> {}</p>", e);
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(plain, html)
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}
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};
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2020-08-21 21:49:22 +00:00
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Execution { plain, html }
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}
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}
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2020-08-28 22:02:41 +00:00
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pub struct HelpCommand(Option<HelpTopic>);
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impl Command for HelpCommand {
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fn name(&self) -> &'static str {
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"help information"
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}
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2020-10-15 16:52:08 +00:00
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fn execute(&self, _ctx: &Context) -> Execution {
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2020-08-28 22:02:41 +00:00
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let help = match &self.0 {
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Some(topic) => topic.message(),
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_ => "There is no help for this topic",
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};
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let plain = format!("Help: {}", help);
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let html = format!("<p><strong>Help:</strong> {}", help.replace("\n", "<br/>"));
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Execution { plain, html }
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}
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}
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2020-10-15 16:52:08 +00:00
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pub struct GetVariableCommand(String);
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impl Command for GetVariableCommand {
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fn name(&self) -> &'static str {
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"retrieve variable value"
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}
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fn execute(&self, ctx: &Context) -> Execution {
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let name = &self.0;
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let value = match ctx.db.get_user_variable(ctx.room_id, ctx.username, name) {
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Ok(Some(num)) => format!("{} = {}", name, num),
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Ok(None) => format!("{} is not set", name),
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Err(e) => format!("error getting {}: {}", name, e),
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};
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let plain = format!("Variable: {}", value);
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let html = format!("<p><strong>Variable:</strong> {}", value);
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Execution { plain, html }
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}
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}
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pub struct SetVariableCommand(String, i32);
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impl Command for SetVariableCommand {
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fn name(&self) -> &'static str {
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"set variable value"
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}
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fn execute(&self, ctx: &Context) -> Execution {
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let name = &self.0;
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let value = self.1;
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let value = match ctx
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.db
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.set_user_variable(ctx.room_id, ctx.username, name, value)
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{
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Ok(_) => format!("{} = {}", name, value),
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Err(e) => format!("error setting {}: {}", name, e),
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};
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let plain = format!("Set Variable: {}", value);
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let html = format!("<p><strong>Set Variable:</strong> {}", value);
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Execution { plain, html }
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}
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}
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pub struct DeleteVariableCommand(String);
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impl Command for DeleteVariableCommand {
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fn name(&self) -> &'static str {
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"delete variable"
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}
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fn execute(&self, ctx: &Context) -> Execution {
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let name = &self.0;
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let value = match ctx.db.delete_user_variable(ctx.room_id, ctx.username, name) {
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Ok(()) => format!("{} now unset", name),
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Err(e) => format!("error deleting {}: {}", name, e),
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};
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let plain = format!("Remove Variable: {}", value);
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let html = format!("<p><strong>Remove Variable:</strong> {}", value);
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Execution { plain, html }
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}
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}
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impl dyn Command {
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/// Parse a command string into a dynamic command execution trait
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/// object. Returns an error if a command was recognized but not
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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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Err(e) => Err(e),
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}
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}
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}
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pub struct CommandResult {
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pub plain: String,
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pub html: String,
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}
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/// Attempt to execute a command, and return the content that should
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/// go back to Matrix, if the command was executed (successfully or
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/// not). If a command is determined to be ignored, this function will
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/// return None, signifying that we should not send a response.
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pub fn execute_command<'a>(ctx: &'a Context) -> Option<CommandResult> {
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let res = Command::parse(ctx.message_body).map(|cmd| {
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let execution = cmd.execute(ctx);
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(execution.plain().into(), execution.html().into())
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});
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let (plain, html) = match res {
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Ok(plain_and_html) => plain_and_html,
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Err(BotError::CommandError(CommandError::IgnoredCommand)) => return None,
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Err(e) => {
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let message = format!("Error parsing command: {}", e);
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let html_message = format!("<p><strong>{}</strong></p>", message);
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(message, html_message)
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}
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};
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let plain = format!("{}\n{}", ctx.username, plain);
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let html = format!("<p>{}</p>\n{}", ctx.username, html);
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Some(CommandResult {
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plain: plain,
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html: html,
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})
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2020-04-21 03:15:13 +00:00
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}
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2020-08-21 21:49:22 +00:00
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn chance_die_is_not_malformed() {
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2020-10-15 16:52:08 +00:00
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assert!(Command::parse("!chance").is_ok());
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2020-08-21 21:49:22 +00:00
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}
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#[test]
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fn roll_malformed_expression_test() {
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2020-10-15 16:52:08 +00:00
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assert!(Command::parse("!roll 1d20asdlfkj").is_err());
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assert!(Command::parse("!roll 1d20asdlfkj ").is_err());
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2020-08-21 21:49:22 +00:00
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}
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#[test]
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2020-08-30 20:48:52 +00:00
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fn roll_dice_pool_malformed_expression_test() {
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2020-10-15 16:52:08 +00:00
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assert!(Command::parse("!pool 8abc").is_err());
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assert!(Command::parse("!pool 8abc ").is_err());
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2020-08-30 20:48:52 +00:00
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}
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#[test]
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fn pool_whitespace_test() {
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2020-10-15 16:52:08 +00:00
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Command::parse("!pool ns3:8 ").expect("was error");
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Command::parse(" !pool ns3:8").expect("was error");
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Command::parse(" !pool ns3:8 ").expect("was error");
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2020-08-30 20:48:52 +00:00
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}
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2020-08-28 22:02:41 +00:00
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#[test]
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fn help_whitespace_test() {
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2020-10-15 16:52:08 +00:00
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Command::parse("!help stuff ").expect("was error");
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Command::parse(" !help stuff").expect("was error");
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Command::parse(" !help stuff ").expect("was error");
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2020-08-28 22:02:41 +00:00
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}
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2020-08-30 20:48:52 +00:00
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#[test]
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fn roll_whitespace_test() {
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2020-10-15 16:52:08 +00:00
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Command::parse("!roll 1d4 + 5d6 -3 ").expect("was error");
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Command::parse("!roll 1d4 + 5d6 -3 ").expect("was error");
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Command::parse(" !roll 1d4 + 5d6 -3 ").expect("was error");
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2020-08-21 21:49:22 +00:00
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}
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}
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