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use super::argument::Argument;
use super::error::*;
use super::option::Option;
use std::collections::HashMap;
use std::fmt;
use std::result;
use std::string::String;
use std::vec::Vec;
#[derive(Debug)]
pub struct Command {
pub name: String,
pub help: String,
pub options: Vec<Option>,
pub arguments: Vec<Argument>,
pub last_argument_is_variadic: bool,
}
impl Command {
pub fn new(name: &str,
help: &str,
options: Vec<Option>,
arguments: Vec<Argument>,
last_argument_is_variadic: bool)
-> Result<Command> {
if !arguments.iter()
.skip_while(|a| a.default_value.is_none())
.all(|a| a.default_value.is_some()) {
bail!("Missing default argument value");
}
if !arguments.is_empty() &&
!&arguments[..arguments.len() - 1]
.iter()
.all(|a| a.default_value.as_ref().map_or(0, |dv| dv.len()) <= 1) {
bail!("Too many default argument values");
}
let has_multiple_defaults = arguments.iter().last().map_or(false, |a| {
a.default_value.as_ref().map_or(false, |dv| dv.len() > 1)
});
if !last_argument_is_variadic && has_multiple_defaults {
bail!("Too many default argument values");
}
Ok(Command {
name: name.to_owned(),
help: help.to_owned(),
options: options,
arguments: arguments,
last_argument_is_variadic: last_argument_is_variadic,
})
}
}
impl PartialEq for Command {
fn eq(&self, other: &Command) -> bool { self.name == other.name }
}
pub type CommandResult<E> = result::Result<(), E>;
pub type CommandCallback<'a, E> = Box<FnMut(HashMap<String, String>,
HashMap<String, bool>,
HashMap<String, Vec<String>>)
-> CommandResult<E> + 'a>;
pub struct ExecutableCommand<'a, E> {
pub command: Command,
callback: CommandCallback<'a, E>,
}
impl<'a, E> fmt::Debug for ExecutableCommand<'a, E> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(format!("{:#?}", self.command).as_ref())?;
Ok(())
}
}
impl<'a, E> PartialEq<Command> for ExecutableCommand<'a, E> {
fn eq(&self, other: &Command) -> bool { self.command == *other }
}
impl<'a, E> ExecutableCommand<'a, E> {
pub fn new(command: Command, callback: CommandCallback<'a, E>) -> ExecutableCommand<'a, E> {
ExecutableCommand {
command: command,
callback: callback,
}
}
pub fn execute(&mut self,
options: HashMap<String, String>,
flags: HashMap<String, bool>,
arguments: HashMap<String, Vec<String>>)
-> CommandResult<E> {
self.callback.as_mut()(options, flags, arguments)
}
}