ruma-common 0.9.2

use std::fmt;

use indoc::formatdoc;

use super::{FormattedBody, MessageType, OriginalRoomMessageEvent};

pub fn get_plain_quote_fallback(original_message: &OriginalRoomMessageEvent) -> String {
    let sender = &original_message.sender;

    match &original_message.content.msgtype {
        MessageType::Audio(_) => {
            format!("> <{}> sent an audio file.", sender)
        }
        MessageType::Emote(content) => {
            format!("> * <{}> {}", sender, content.body)
        }
        MessageType::File(_) => {
            format!("> <{}> sent a file.", sender)
        }
        MessageType::Image(_) => {
            format!("> <{}> sent an image.", sender)
        }
        MessageType::Location(content) => {
            format!("> <{}> {}", sender, content.body)
        }
        MessageType::Notice(content) => {
            format!("> <{}> {}", sender, content.body)
        }
        MessageType::ServerNotice(content) => {
            format!("> <{}> {}", sender, content.body)
        }
        MessageType::Text(content) => {
            format!("> <{}> {}", sender, content.body)
        }
        MessageType::Video(_) => {
            format!("> <{}> sent a video.", sender)
        }
        MessageType::_Custom(content) => {
            format!("> <{}> {}", sender, content.body)
        }
        MessageType::VerificationRequest(content) => {
            format!("> <{}> {}", sender, content.body)
        }
    }
    .replace('\n', "\n> ")
}

#[allow(clippy::nonstandard_macro_braces)]
pub fn get_html_quote_fallback(original_message: &OriginalRoomMessageEvent) -> String {
    match &original_message.content.msgtype {
        MessageType::Audio(_) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        sent an audio file.
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
            )
        }
        MessageType::Emote(content) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        * <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        {body}
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
                body = formatted_or_plain_body(&content.formatted, &content.body),
            )
        }
        MessageType::File(_) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        sent a file.
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
            )
        }
        MessageType::Image(_) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        sent an image.
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
            )
        }
        MessageType::Location(_) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        sent a location.
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
            )
        }
        MessageType::Notice(content) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        {body}
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
                body = formatted_or_plain_body(&content.formatted, &content.body),
            )
        }
        MessageType::ServerNotice(content) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        {body}
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
                body = content.body,
            )
        }
        MessageType::Text(content) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        {body}
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
                body = formatted_or_plain_body(&content.formatted, &content.body),
            )
        }
        MessageType::Video(_) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        sent a video.
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
            )
        }
        MessageType::_Custom(content) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{room_id}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        {body}
                    </blockquote>
                </mx-reply>
                ",
                room_id = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
                body = content.body,
            )
        }
        MessageType::VerificationRequest(content) => {
            formatdoc!(
                "
                <mx-reply>
                    <blockquote>
                        <a href=\"https://matrix.to/#/{server_name}/{event_id}\">In reply to</a>
                        <a href=\"https://matrix.to/#/{sender}\">{sender}</a>
                        <br />
                        {body}
                    </blockquote>
                </mx-reply>
                ",
                server_name = original_message.room_id,
                event_id = original_message.event_id,
                sender = original_message.sender,
                body = content.body,
            )
        }
    }
}

fn formatted_or_plain_body<'a>(formatted: &'a Option<FormattedBody>, body: &'a str) -> &'a str {
    if let Some(formatted_body) = formatted {
        &formatted_body.body
    } else {
        body
    }
}

/// Get the plain and formatted body for a rich reply.
///
/// Returns a `(plain, html)` tuple.
pub fn plain_and_formatted_reply_body(
    body: impl fmt::Display,
    formatted: Option<impl fmt::Display>,
    original_message: &OriginalRoomMessageEvent,
) -> (String, String) {
    let quoted = get_plain_quote_fallback(original_message);
    let quoted_html = get_html_quote_fallback(original_message);

    let plain = format!("{}\n\n{}", quoted, body);
    let html = if let Some(formatted) = formatted {
        format!("{}\n\n{}", quoted_html, formatted)
    } else {
        format!("{}\n\n{}", quoted_html, body)
    };

    (plain, html)
}

#[cfg(test)]
mod tests {
    use crate::{
        event_id,
        events::{room::message::RoomMessageEventContent, MessageLikeUnsigned},
        room_id, user_id, MilliSecondsSinceUnixEpoch,
    };

    use super::OriginalRoomMessageEvent;

    #[test]
    fn plain_quote_fallback_multiline() {
        assert_eq!(
            super::get_plain_quote_fallback(&OriginalRoomMessageEvent {
                content: RoomMessageEventContent::text_plain("multi\nline"),
                event_id: event_id!("$1598361704261elfgc:localhost").to_owned(),
                sender: user_id!("@alice:example.com").to_owned(),
                origin_server_ts: MilliSecondsSinceUnixEpoch::now(),
                room_id: room_id!("!n8f893n9:example.com").to_owned(),
                unsigned: MessageLikeUnsigned::new(),
            }),
            "> <@alice:example.com> multi\n> line"
        );
    }
}