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use std::fmt;
use std::str::FromStr;
use super::action_kind::ActionKind;
use super::atomic_tag::AtomicTag;
use crate::arguments::{ArgumentScanner, Arguments, ExpectArg};
use crate::elements::{
Color, Dest, Expire, Filter, Font, Frame, Gauge, Heading, Hyperlink, Image, Music, Relocate,
Send, Sound, Stat, StyleVersion, Support, Var,
};
use crate::parse::{FromStrError, IntoOwnedString, split_name, validate};
use crate::{Error, ErrorKind};
/// Effect caused by an element. Created by applying [`Arguments`] to an element [`AtomicTag`].
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum Action<S = String> {
/// [`<BOLD>`](https://www.zuggsoft.com/zmud/mxp.htm#Text%20Formatting):
/// Make text bold.
Bold,
/// [`<BR>`](https://www.zuggsoft.com/zmud/mxp.htm#Line%20Spacing):
/// Insert a hard line break.
Br,
///[`<COLOR>`](https://www.zuggsoft.com/zmud/mxp.htm#Text%20Formatting):
/// Change text color.
Color(Color),
/// [`<DEST>`](https://www.zuggsoft.com/zmud/mxp.htm#Cursor%20Control):
/// Set destination frame.
Dest(Dest<S>),
/// [`<EXPIRE>`](https://www.zuggsoft.com/zmud/mxp.htm#Links):
/// Expire links.
Expire(Expire<S>),
/// [`<FILTER>`](https://www.zuggsoft.com/zmud/mxp.htm#File%20Filters):
/// Set file filter.
Filter(Filter<S>),
/// [`<FONT>`](https://www.zuggsoft.com/zmud/mxp.htm#Text%20Formatting):
/// Change text font.
Font(Font<S>),
/// [`<FRAME>`](https://www.zuggsoft.com/zmud/mxp.htm#Frames):
/// Create a frame window.
Frame(Frame<S>),
/// [`<GAUGE>`](https://www.zuggsoft.com/zmud/mxp.htm#Using%20Entities):
/// Display an MXP entity value as a gauge.
Gauge(Gauge<S>),
/// [`<H{N}>`](https://www.zuggsoft.com/zmud/mxp.htm#HTML%20tags):
/// Format text as a heading.
Heading(Heading),
/// [`<HIGH>`](https://www.zuggsoft.com/zmud/mxp.htm#Text%20Formatting):
/// Highlight text.
Highlight,
/// [`<HR>`](https://www.zuggsoft.com/zmud/mxp.htm#HTML%20tags):
/// Insert a horizontal rule.
Hr,
/// [`<A>`](https://www.zuggsoft.com/zmud/mxp.htm#Links):
/// Hyperlink.
Hyperlink(Hyperlink<S>),
/// [`<IMAGE>`](https://www.zuggsoft.com/zmud/mxp.htm#Images):
/// Display an image.
Image(Image<S>),
/// [`<ITALIC>`](https://www.zuggsoft.com/zmud/mxp.htm#Text%20Formatting):
/// Make text italic.
Italic,
/// [`<MUSIC>`](https://www.zuggsoft.com/zmud/mxp.htm#MSP%20Compatibility):
/// Play music.
Music(Music<S>),
/// [`<MUSIC OFF>`](https://www.zuggsoft.com/zmud/mxp.htm#MSP%20Compatibility):
/// Stop music.
MusicOff,
/// [`<MXP OFF>`](https://gpascal.com/forum/?id=232):
/// MXP control command. This is an unofficial extension to the MXP protocol.
MxpOff,
/// [`<NOBR>`](https://www.zuggsoft.com/zmud/mxp.htm#Line%20Spacing):
/// Ignore next newline.
NoBr,
/// [`<P>`](https://www.zuggsoft.com/zmud/mxp.htm#Line%20Spacing):
/// Insert a paragraph break.
P,
/// [`<PASSWORD>`](https://www.zuggsoft.com/zmud/mxp.htm#Crosslinking%20multiple%20MUD%20servers):
/// Prompt client to send user password.
Password,
/// [`<RELOCATE>`](https://www.zuggsoft.com/zmud/mxp.htm#Crosslinking%20multiple%20MUD%20servers):
/// Prompt client to switch to a new network connection.
Relocate(Relocate<S>),
/// [`<RESET>`](https://gpascal.com/forum/?id=232):
/// Close all OPEN tags. This is an unofficial extension to the MXP protocol.
Reset,
/// [`<SBR>`](https://www.zuggsoft.com/zmud/mxp.htm#Line%20Spacing):
/// Insert a soft linebreak.
SBr,
/// [`<Send>`](https://www.zuggsoft.com/zmud/mxp.htm#Links):
/// Turn text into a link that sends a command to the world.
Send(Send<S>),
/// [`<SMALL>`](https://www.zuggsoft.com/zmud/mxp.htm#HTML%20tags):
/// Display text in a smaller size.
Small,
/// [`<SOUND>`](https://www.zuggsoft.com/zmud/mxp.htm#MSP%20Compatibility):
/// Play a sound file.
Sound(Sound<S>),
/// [`<SOUND OFF>`](https://www.zuggsoft.com/zmud/mxp.htm#MSP%20Compatibility):
/// Stop all sound.
SoundOff,
/// [`<STAT>`](https://www.zuggsoft.com/zmud/mxp.htm#Using%20Entities):
/// Display an MXP entity value on the status bar.
Stat(Stat<S>),
/// [`<STRIKEOUT>`](https://www.zuggsoft.com/zmud/mxp.htm#Text%20Formatting):
/// Strike-out the text.
Strikeout,
/// [`<VERSION>`](https://www.zuggsoft.com/zmud/mxp.htm#Version%20Control):
/// The client should cache this style-sheet version number and return it when
/// requested by a plain [`<VERSION>`](Self::Version) request.
StyleVersion(StyleVersion<S>),
/// [`<SUPPORT>`](https://www.zuggsoft.com/zmud/mxp.htm#Version%20Control):
/// Prompt client to respond with the commands that it supports.
Support(Support<S>),
/// [`<TT>`](https://www.zuggsoft.com/zmud/mxp.htm#HTML%20tags):
/// Display text in a non-proportional font.
Tt,
/// [`<UNDERLINE>`](https://www.zuggsoft.com/zmud/mxp.htm#Text%20Formatting):
/// Underline text.
Underline,
/// [`<USER>`](https://www.zuggsoft.com/zmud/mxp.htm#Crosslinking%20multiple%20MUD%20servers):
/// Prompt client to send username.
User,
/// [`<VAR>`](https://www.zuggsoft.com/zmud/mxp.htm#ENTITY):
/// Set an MXP variable.
Var(Var<S>),
/// [`<VERSION>`](https://www.zuggsoft.com/zmud/mxp.htm#Version%20Control):
/// Prompt client to respond with its client and version of MXP.
Version,
}
impl<S: AsRef<str> + Clone + Default> Action<S> {
pub(crate) fn decode<'a, A>(action: ActionKind, mut scanner: A) -> crate::Result<Self>
where
A: ArgumentScanner<'a, Decoded = S>,
{
Ok(match action {
ActionKind::Bold => Self::Bold,
ActionKind::Br => Self::Br,
ActionKind::Color => Self::Color(scanner.parse()?),
ActionKind::Dest => Self::Dest(scanner.parse()?),
ActionKind::Expire => Self::Expire(scanner.parse()?),
ActionKind::Filter => Self::Filter(scanner.parse()?),
ActionKind::Font => Self::Font(scanner.parse()?),
ActionKind::Frame => Self::Frame(scanner.parse()?),
ActionKind::Gauge => Self::Gauge(scanner.parse()?),
ActionKind::H1 => Self::Heading(Heading::H1),
ActionKind::H2 => Self::Heading(Heading::H2),
ActionKind::H3 => Self::Heading(Heading::H3),
ActionKind::H4 => Self::Heading(Heading::H4),
ActionKind::H5 => Self::Heading(Heading::H5),
ActionKind::H6 => Self::Heading(Heading::H6),
ActionKind::Highlight => Self::Highlight,
ActionKind::Hr => Self::Hr,
ActionKind::Hyperlink => Self::Hyperlink(scanner.parse()?),
ActionKind::Image => Self::Image(scanner.parse()?),
ActionKind::Italic => Self::Italic,
ActionKind::Mxp => {
let command = scanner.get_next()?.expect_some("off")?;
let s = command.as_ref();
if s.eq_ignore_ascii_case("off") {
Self::MxpOff
} else {
return Err(Error::new(s, ErrorKind::UnexpectedArgument));
}
}
ActionKind::Music => {
let music: Music<S> = scanner.parse()?;
if music.is_off() {
Self::MusicOff
} else {
Self::Music(music)
}
}
ActionKind::NoBr => Self::NoBr,
ActionKind::P => Self::P,
ActionKind::Password => Self::Password,
ActionKind::Relocate => Self::Relocate(scanner.parse()?),
ActionKind::Reset => Self::Reset,
ActionKind::SBr => Self::SBr,
ActionKind::Send => Self::Send(scanner.parse()?),
ActionKind::Small => Self::Small,
ActionKind::Sound => {
let sound: Sound<S> = scanner.parse()?;
if sound.is_off() {
Self::SoundOff
} else {
Self::Sound(sound)
}
}
ActionKind::Stat => Self::Stat(scanner.parse()?),
ActionKind::Strikeout => Self::Strikeout,
ActionKind::Support => Self::Support(scanner.parse()?),
ActionKind::Tt => Self::Tt,
ActionKind::Underline => Self::Underline,
ActionKind::User => Self::User,
ActionKind::Var => Self::Var(scanner.parse()?),
ActionKind::Version => {
if let Some(styleversion) = scanner.get_next()? {
Self::StyleVersion(StyleVersion { styleversion })
} else {
Self::Version
}
}
})
}
}
impl<S: IntoOwnedString> Action<S> {
pub fn into_owned(self) -> Action<String> {
self.map_text(IntoOwnedString::into_owned_string)
}
}
impl<S> Action<S> {
/// Applies a type transformation to all text, returning a new struct.
pub fn map_text<F, T>(self, f: F) -> Action<T>
where
F: FnMut(S) -> T,
{
match self {
Self::Bold => Action::Bold,
Self::Br => Action::Br,
Self::Color(color) => Action::Color(color),
Self::Dest(dest) => Action::Dest(dest.map_text(f)),
Self::Expire(expire) => Action::Expire(expire.map_text(f)),
Self::Filter(filter) => Action::Filter(filter.map_text(f)),
Self::Font(font) => Action::Font(font.map_text(f)),
Self::Frame(frame) => Action::Frame(frame.map_text(f)),
Self::Gauge(gauge) => Action::Gauge(gauge.map_text(f)),
Self::Heading(heading) => Action::Heading(heading),
Self::Highlight => Action::Highlight,
Self::Hr => Action::Hr,
Self::Hyperlink(hyperlink) => Action::Hyperlink(hyperlink.map_text(f)),
Self::Image(image) => Action::Image(image.map_text(f)),
Self::Italic => Action::Italic,
Self::Music(music) => Action::Music(music.map_text(f)),
Self::MusicOff => Action::MusicOff,
Self::MxpOff => Action::MxpOff,
Self::NoBr => Action::NoBr,
Self::P => Action::P,
Self::Password => Action::Password,
Self::Relocate(relocate) => Action::Relocate(relocate.map_text(f)),
Self::Reset => Action::Reset,
Self::SBr => Action::SBr,
Self::Small => Action::Small,
Self::Send(send) => Action::Send(send.map_text(f)),
Self::Sound(sound) => Action::Sound(sound.map_text(f)),
Self::SoundOff => Action::SoundOff,
Self::Stat(stat) => Action::Stat(stat.map_text(f)),
Self::Strikeout => Action::Strikeout,
Self::StyleVersion(style_version) => Action::StyleVersion(style_version.map_text(f)),
Self::Support(support) => Action::Support(support.map_text(f)),
Self::Tt => Action::Tt,
Self::Underline => Action::Underline,
Self::User => Action::User,
Self::Var(var) => Action::Var(var.map_text(f)),
Self::Version => Action::Version,
}
}
}
impl FromStr for Action<String> {
type Err = FromStrError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let s = crate::parse::cleanup_source(s)?;
let (name, args) = split_name(s);
if name.is_empty() {
return Err(Error::new(s, ErrorKind::EmptyElement).into());
}
validate(name, ErrorKind::InvalidElementName)?;
let tag = AtomicTag::well_known(name)
.ok_or_else(|| FromStrError::UnexpectedTag(name.to_owned()))?;
let args = Arguments::parse(args)?;
tag.check_arguments(&args)?;
Ok(Action::decode(tag.action, args.scan().with_decoder(()))?.into_owned())
}
}
impl<S: AsRef<str>> fmt::Display for Action<S> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Self::Bold => f.write_str("<B>"),
Self::Br => f.write_str("<BR>"),
Self::Color(color) => color.fmt(f),
Self::Dest(dest) => dest.fmt(f),
Self::Expire(expire) => expire.fmt(f),
Self::Filter(filter) => filter.fmt(f),
Self::Font(font) => font.fmt(f),
Self::Frame(frame) => frame.fmt(f),
Self::Gauge(gauge) => gauge.fmt(f),
Self::Heading(heading) => heading.fmt(f),
Self::Highlight => f.write_str("<H>"),
Self::Hr => f.write_str("<HR>"),
Self::Hyperlink(hyperlink) => hyperlink.fmt(f),
Self::Image(image) => image.fmt(f),
Self::Italic => f.write_str("<I>"),
Self::Music(music) => music.fmt(f),
Self::MusicOff => f.write_str("<MUSIC OFF>"),
Self::MxpOff => f.write_str("<MXP OFF>"),
Self::NoBr => f.write_str("<NOBR>"),
Self::P => f.write_str("<P>"),
Self::Password => f.write_str("<PASSWORD>"),
Self::Relocate(relocate) => relocate.fmt(f),
Self::Reset => f.write_str("<RESET>"),
Self::SBr => f.write_str("<SBR>"),
Self::Send(send) => send.fmt(f),
Self::Small => f.write_str("<SMALL>"),
Self::Sound(sound) => sound.fmt(f),
Self::SoundOff => f.write_str("<SOUND OFF>"),
Self::Stat(stat) => stat.fmt(f),
Self::Strikeout => f.write_str("<S>"),
Self::StyleVersion(style_version) => style_version.fmt(f),
Self::Support(support) => support.fmt(f),
Self::Tt => f.write_str("<TT>"),
Self::Underline => f.write_str("<U>"),
Self::User => f.write_str("<USER>"),
Self::Var(var) => var.fmt(f),
Self::Version => f.write_str("<VERSION>"),
}
}
}