group-actor/src/command.rs

use crate::utils;
use once_cell::sync::Lazy;
use regex::Regex;

#[derive(Debug, Clone, PartialEq)]
pub enum StatusCommand {
    /// Ignore this post
    Ignore,
    /// Boost the previous post in the thread
    Boost,
    /// Un-reblog parent post, or delete an announcement
    Undo,
    /// Admin: Ban a user
    BanUser(String),
    /// Admin: Un-ban a server
    UnbanUser(String),
    /// Admin: Ban a server
    BanServer(String),
    /// Admin: Un-ban a server
    UnbanServer(String),
    /// Admin: Add a member to a closed group (or force join)
    AddMember(String),
    /// Admin: Remove a user from the group, also unfollow
    RemoveMember(String),
    /// Admin: Add a hashtag to the group
    AddTag(String),
    /// Admin: Remove a hashtag from the group
    RemoveTag(String),
    /// Admin: Give admin to a user
    GrantAdmin(String),
    /// Admin: Revoke admin to a user
    RemoveAdmin(String),
    /// Admin: Send a public announcement
    Announce(String),
    /// Opt out of boosts
    OptOut,
    /// Opt in to boosts
    OptIn,
    /// Admin: Make the group open-access
    OpenGroup,
    /// Admin: Make the group member-only, this effectively disables posting from non-members
    /// and disables /join and follow-back
    CloseGroup,
    /// Show help. The content varies by group params (open/closed access), the user's privileges
    /// and membership status.
    Help,
    /// Show members. Non-admins will only see a list of admins.
    ListMembers,
    /// Show tags.
    ListTags,
    /// Leave the group, this asks the group to unfollow the user and also revokes their membership.
    Leave,
    /// Join a public group. This is normally not needed, as the group follows back and adds followers as members.
    /// Manual join is useful when the follow somehow fails, or when the user wants to be able to
    /// post without receiving the group's posts (naughty!)
    ///
    /// In member-only groups, this will just DM the user some info on how to get added.
    Join,
    /// The group will DM "Pong" back, this is to test that the daemon is running and also that the
    /// user is not banned and federates.
    Ping,
}

macro_rules! p_user {
    () => {
        r"(@?[a-zA-Z0-9_.-]+@[a-zA-Z0-9_.-]+\.[a-z0-9_-]+|@[a-zA-Z0-9_.-]+)"
    };
}

macro_rules! p_server {
    () => {
        r"([a-zA-Z0-9_.-]+\.[a-zA-Z0-9_-]+)"
    };
}

macro_rules! p_hashtag {
    () => {
        r"#(\w+)"
    };
}

macro_rules! command {
    ($($val:expr),+) => {
        Regex::new(concat!(r"(?:^|\s|>|\n)[\\/]", $($val,)+ r"(?:$|[!,]|\W)")).unwrap()
    }
}

static RE_BOOST: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"b(?:oost)?"));

static RE_UNDO: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:delete|undo)"));

static RE_IGNORE: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"i(?:g(?:n(?:ore)?)?)?"));

static RE_BAN_USER: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"ban\s+", p_user!()));

static RE_UNBAN_USER: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"unban\s+", p_user!()));

static RE_BAN_SERVER: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"ban\s+", p_server!()));

static RE_UNBAN_SERVER: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"unban\s+", p_server!()));

static RE_ADD_MEMBER: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:add|follow)\s+", p_user!()));

static RE_REMOVE_MEMBER: once_cell::sync::Lazy<Regex> =
    Lazy::new(|| command!(r"(?:kick|unfollow|remove)\s+", p_user!()));

static RE_ADD_TAG: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:add|follow)\s+", p_hashtag!()));

static RE_REMOVE_TAG: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:remove|unfollow)\s+", p_hashtag!()));

static RE_GRANT_ADMIN: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:op|admin)\s+", p_user!()));

static RE_REVOKE_ADMIN: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:deop|deadmin)\s+", p_user!()));

static RE_OPEN_GROUP: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"opengroup"));

static RE_CLOSE_GROUP: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"closegroup"));

static RE_HELP: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"help"));

static RE_MEMBERS: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:members|who|admins)"));

static RE_TAGS: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"(?:hashtags|tags)"));

static RE_LEAVE: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"leave"));

static RE_JOIN: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"join"));

static RE_OPTOUT: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"optout"));

static RE_OPTIN: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"optin"));

static RE_PING: once_cell::sync::Lazy<Regex> = Lazy::new(|| command!(r"ping"));

static RE_ANNOUNCE: once_cell::sync::Lazy<Regex> =
    Lazy::new(|| Regex::new(r"(?:^|\s|>|\n)[\\/]announce\s+(.*)$").unwrap());

static RE_A_HASHTAG: once_cell::sync::Lazy<Regex> = Lazy::new(|| Regex::new(r"(?:^|\s|>|\n)#(\w+)").unwrap());

pub static RE_NOBOT_TAG: once_cell::sync::Lazy<Regex> =
    Lazy::new(|| Regex::new(r"(?:^|\s|>|\n)#nobot(?:\b|$)").unwrap());

pub static RE_HASHTAG_TRIGGERING_PLEROMA_BUG: once_cell::sync::Lazy<Regex> =
    Lazy::new(|| Regex::new(r"(?:^|\s|>|\n)#\w+[^\s]*$").unwrap());

pub fn parse_status_tags(content: &str) -> Vec<String> {
    debug!("Raw content: {}", content);
    let content = utils::strip_html(content);
    debug!("Stripped tags: {}", content);

    let mut tags = vec![];
    for c in RE_A_HASHTAG.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            tags.push(s.as_str().to_lowercase())
        }
    }

    tags
}

pub fn parse_slash_commands(content: &str) -> Vec<StatusCommand> {
    debug!("Raw content: {}", content);
    let content = utils::strip_html(content);
    debug!("Stripped tags: {}", content);

    if !content.contains('/') && !content.contains('\\') {
        // No slash = no command
        return vec![];
    }

    // short-circuiting commands

    if RE_IGNORE.is_match(&content) {
        debug!("IGNORE");
        return vec![StatusCommand::Ignore];
    }

    if RE_HELP.is_match(&content) {
        debug!("HELP");
        return vec![StatusCommand::Help];
    }

    if RE_UNDO.is_match(&content) {
        debug!("UNDO");
        return vec![StatusCommand::Undo];
    }

    // additive commands

    let mut commands = vec![];

    // one-use commands

    if RE_BOOST.is_match(&content) {
        debug!("BOOST");
        commands.push(StatusCommand::Boost);
    }

    if RE_LEAVE.is_match(&content) {
        debug!("LEAVE");
        commands.push(StatusCommand::Leave);
    } else if RE_JOIN.is_match(&content) {
        debug!("JOIN");
        commands.push(StatusCommand::Join);
    }

    if RE_OPTOUT.is_match(&content) {
        debug!("OPT-OUT");
        commands.push(StatusCommand::OptOut);
    } else if RE_OPTIN.is_match(&content) {
        debug!("OPT-IN");
        commands.push(StatusCommand::OptIn);
    }

    if RE_PING.is_match(&content) {
        debug!("PING");
        commands.push(StatusCommand::Ping);
    }

    if RE_MEMBERS.is_match(&content) {
        debug!("MEMBERS");
        commands.push(StatusCommand::ListMembers);
    }

    if RE_TAGS.is_match(&content) {
        debug!("TAGS");
        commands.push(StatusCommand::ListTags);
    }

    if RE_OPEN_GROUP.is_match(&content) {
        debug!("OPEN GROUP");
        commands.push(StatusCommand::OpenGroup);
    }

    if RE_CLOSE_GROUP.is_match(&content) {
        debug!("CLOSE GROUP");
        commands.push(StatusCommand::CloseGroup);
    }

    if let Some(c) = RE_ANNOUNCE.captures(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str().trim();
            debug!("ANNOUNCE: «{}»", s);
            commands.push(StatusCommand::Announce(s.to_owned()));
        }
    }

    // multi-occurence commands

    for c in RE_BAN_USER.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            let s = s.trim_start_matches('@');
            debug!("BAN USER: {}", s);
            commands.push(StatusCommand::BanUser(s.to_lowercase()));
        }
    }

    for c in RE_UNBAN_USER.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            let s = s.trim_start_matches('@');
            debug!("UNBAN USER: {}", s);
            commands.push(StatusCommand::UnbanUser(s.to_lowercase()));
        }
    }

    for c in RE_BAN_SERVER.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            debug!("BAN SERVER: {}", s.as_str());
            commands.push(StatusCommand::BanServer(s.as_str().to_lowercase()));
        }
    }

    for c in RE_UNBAN_SERVER.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            debug!("UNBAN SERVER: {}", s.as_str());
            commands.push(StatusCommand::UnbanServer(s.as_str().to_lowercase()));
        }
    }

    for c in RE_ADD_MEMBER.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            let s = s.trim_start_matches('@');
            debug!("ADD MEMBER: {}", s);
            commands.push(StatusCommand::AddMember(s.to_lowercase()));
        }
    }

    for c in RE_REMOVE_MEMBER.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            let s = s.trim_start_matches('@');
            debug!("REMOVE USER: {}", s);
            commands.push(StatusCommand::RemoveMember(s.to_lowercase()));
        }
    }

    for c in RE_ADD_TAG.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            debug!("ADD TAG: {}", s);
            commands.push(StatusCommand::AddTag(s.to_lowercase()));
        }
    }

    for c in RE_REMOVE_TAG.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            debug!("REMOVE TAG: {}", s);
            commands.push(StatusCommand::RemoveTag(s.to_lowercase()));
        }
    }

    for c in RE_GRANT_ADMIN.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            let s = s.trim_start_matches('@');
            debug!("ADD ADMIN: {}", s);
            commands.push(StatusCommand::GrantAdmin(s.to_lowercase()));
        }
    }

    for c in RE_REVOKE_ADMIN.captures_iter(&content) {
        if let Some(s) = c.get(1) {
            let s = s.as_str();
            let s = s.trim_start_matches('@');
            debug!("REMOVE ADMIN: {}", s);
            commands.push(StatusCommand::RemoveAdmin(s.to_lowercase()));
        }
    }

    commands
}

#[cfg(test)]
mod test {
    use crate::command::{
        parse_slash_commands, StatusCommand, RE_ADD_TAG, RE_A_HASHTAG, RE_HASHTAG_TRIGGERING_PLEROMA_BUG, RE_JOIN,
        RE_NOBOT_TAG,
    };

    use super::{
        RE_ADD_MEMBER, RE_ANNOUNCE, RE_BAN_SERVER, RE_BAN_USER, RE_BOOST, RE_CLOSE_GROUP, RE_GRANT_ADMIN, RE_HELP,
        RE_IGNORE, RE_LEAVE, RE_MEMBERS, RE_OPEN_GROUP, RE_OPTIN, RE_OPTOUT, RE_REMOVE_MEMBER, RE_REVOKE_ADMIN,
        RE_TAGS, RE_UNDO,
    };

    #[test]
    fn test_boost() {
        assert!(RE_BOOST.is_match("/b"));
        assert!(RE_BOOST.is_match(">/b"));
        assert!(RE_BOOST.is_match("/b mm"));
        assert!(RE_BOOST.is_match("/b."));
        assert!(RE_BOOST.is_match("\\b"));
        assert!(!RE_BOOST.is_match("boo/b"));
        assert!(RE_BOOST.is_match("bla\n/b"));
        assert!(RE_BOOST.is_match("/boost"));
        assert!(RE_BOOST.is_match("/boost\n"));
        assert!(RE_BOOST.is_match("/boost dfdfg"));
        assert!(!RE_BOOST.is_match("/boosty"));
        assert!(RE_BOOST.is_match("/b\nxxx"));
        assert!(!RE_BOOST.is_match("/bleble\n"));
    }

    #[test]
    fn test_ignore() {
        assert!(RE_IGNORE.is_match("/i"));
        assert!(RE_IGNORE.is_match("/ig"));
        assert!(RE_IGNORE.is_match("/ign"));
        assert!(RE_IGNORE.is_match("/i mm"));
        assert!(RE_IGNORE.is_match("/i."));
        assert!(RE_IGNORE.is_match("\\i"));
        assert!(!RE_IGNORE.is_match("boo/i"));
        assert!(RE_IGNORE.is_match("bla\n/i"));
        assert!(RE_IGNORE.is_match("/ignore"));
        assert!(RE_IGNORE.is_match("/ignore x"));
        assert!(RE_IGNORE.is_match("/ignore\n"));
        assert!(RE_IGNORE.is_match("/ignore dfdfg"));
        assert!(!RE_IGNORE.is_match("/ignorey"));
        assert!(RE_IGNORE.is_match("/i\nxxx"));
        assert!(!RE_IGNORE.is_match("/ileble\n"));
        assert!(!RE_IGNORE.is_match("/ignx"));
    }

    #[test]
    fn test_ban_user() {
        assert!(RE_BAN_USER.is_match("/ban lain@pleroma.soykaf.com"));
        assert!(RE_BAN_USER.is_match("/ban lain@stupidname.uk"));
        assert!(RE_BAN_USER.is_match("bababababa /ban lain@stupidname.uk lala"));
        assert!(!RE_BAN_USER.is_match("/ban stupidname.uk"));

        assert!(RE_BAN_USER.is_match("/ban @lain"));
        assert!(RE_BAN_USER.is_match("/ban @lain aaa"));

        assert!(RE_BAN_USER.is_match("/ban        \t lain@pleroma.soykaf.com"));
        assert!(RE_BAN_USER.is_match("/ban @lain@pleroma.soykaf.com"));
        assert!(RE_BAN_USER.is_match("/ban @l-a_i.n9@xn--999pleroma-weirdname.com"));
        assert!(RE_BAN_USER.is_match("/ban @LAIN@PleromA.soykaf.com"));

        let c = RE_BAN_USER.captures("/ban lain@pleroma.soykaf.com");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "lain@pleroma.soykaf.com");

        let c = RE_BAN_USER.captures("/ban lain@pleroma.soykaf.com xx");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "lain@pleroma.soykaf.com");

        let c = RE_BAN_USER.captures("/ban @lain@pleroma.soykaf.com");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "@lain@pleroma.soykaf.com");

        let c = RE_BAN_USER.captures("/ban @lain");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "@lain");

        let c = RE_BAN_USER.captures("/ban @lain xx");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "@lain");
    }

    #[test]
    fn test_ban_server() {
        assert!(!RE_BAN_SERVER.is_match("/ban lain@pleroma.soykaf.com"));
        assert!(RE_BAN_SERVER.is_match("/ban pleroma.soykaf.com"));
        assert!(RE_BAN_SERVER.is_match("/ban xn--999pleroma-weirdname.com"));
        assert!(RE_BAN_SERVER.is_match("/ban           \t           xn--999pleroma-weirdname.com"));
        assert!(RE_BAN_SERVER.is_match("mamama /ban pleroma.soykaf.com momomo"));
        assert!(!RE_BAN_SERVER.is_match("/ban @pleroma.soykaf.com"));

        let c = RE_BAN_SERVER.captures("/ban pleroma.soykaf.com");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "pleroma.soykaf.com");

        let c = RE_BAN_SERVER.captures("/ban pleroma.soykaf.com xx");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "pleroma.soykaf.com");
    }

    #[test]
    fn test_add_member() {
        assert!(RE_ADD_MEMBER.is_match("/add lain@pleroma.soykaf.com"));
        assert!(RE_ADD_MEMBER.is_match("/add @lain@pleroma.soykaf.com"));
        assert!(RE_ADD_MEMBER.is_match("/follow @lain@pleroma.soykaf.com"));
        assert!(RE_ADD_MEMBER.is_match("\\add @lain"));

        let c = RE_ADD_MEMBER.captures("/add @lain");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "@lain");
    }

    #[test]
    fn test_remove_member() {
        assert!(!RE_REMOVE_MEMBER.is_match("/admin lain@pleroma.soykaf.com"));

        assert!(RE_REMOVE_MEMBER.is_match("/remove lain@pleroma.soykaf.com"));
        assert!(RE_REMOVE_MEMBER.is_match("/remove @lain@pleroma.soykaf.com"));
        assert!(RE_REMOVE_MEMBER.is_match("\\remove @lain"));

        assert!(RE_REMOVE_MEMBER.is_match("/kick @lain"));
        assert!(RE_REMOVE_MEMBER.is_match("/remove @lain"));

        let c = RE_REMOVE_MEMBER.captures("/kick lain@pleroma.soykaf.com");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "lain@pleroma.soykaf.com");
    }

    #[test]
    fn test_add_tag() {
        assert!(RE_ADD_TAG.is_match("/add #breadposting"));
        assert!(RE_ADD_TAG.is_match("/add #čučkaři"));
        assert!(RE_ADD_TAG.is_match("/add #χαλβάς"));
        assert!(RE_ADD_TAG.is_match("\\add #ласточка"));
        assert!(RE_ADD_TAG.is_match("/add #nya."));
        assert!(RE_ADD_TAG.is_match("/add #nya)"));
        assert!(RE_ADD_TAG.is_match("/follow #nya)"));
        assert!(RE_ADD_TAG.is_match("/add #nya and more)"));

        let c = RE_ADD_TAG.captures("/add #breadposting");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "breadposting");

        let c = RE_ADD_TAG.captures("/add #χαλβάς");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "χαλβάς");

        let c = RE_ADD_TAG.captures("/add #ласточка");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "ласточка");

        let c = RE_ADD_TAG.captures("/add #nya.");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "nya");

        let c = RE_ADD_TAG.captures("/add #nya)");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "nya");
    }

    #[test]
    fn test_add_admin() {
        assert!(!RE_GRANT_ADMIN.is_match("/expel lain@pleroma.soykaf.com"));

        assert!(RE_GRANT_ADMIN.is_match("/admin lain@pleroma.soykaf.com"));
        assert!(RE_GRANT_ADMIN.is_match("/op @lain@pleroma.soykaf.com"));
        assert!(RE_GRANT_ADMIN.is_match("\\op @lain"));

        let c = RE_GRANT_ADMIN.captures("/op @lain@pleroma.soykaf.com");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "@lain@pleroma.soykaf.com");
    }

    #[test]
    fn test_remove_admin() {
        assert!(!RE_REVOKE_ADMIN.is_match("/admin lain@pleroma.soykaf.com"));

        assert!(RE_REVOKE_ADMIN.is_match("/deop @lain"));
        assert!(RE_REVOKE_ADMIN.is_match("/deadmin @lain"));

        let c = RE_REVOKE_ADMIN.captures("/deadmin @lain");
        assert_eq!(c.unwrap().get(1).unwrap().as_str(), "@lain");
    }

    #[test]
    fn test_opengroup() {
        assert!(!RE_OPEN_GROUP.is_match("/admin lain@pleroma.soykaf.com"));
        assert!(RE_OPEN_GROUP.is_match("/opengroup"));
        assert!(RE_OPEN_GROUP.is_match("x /opengroup"));
        assert!(RE_OPEN_GROUP.is_match("/opengroup dfgdfg"));
        assert!(RE_OPEN_GROUP.is_match("\n\n/opengroup\n dfgdfg\n\n"));
    }

    #[test]
    fn test_closegroup() {
        assert!(!RE_CLOSE_GROUP.is_match("/admin lain@pleroma.soykaf.com"));
        assert!(RE_CLOSE_GROUP.is_match("/closegroup"));
        assert!(RE_CLOSE_GROUP.is_match("x /closegroup"));
        assert!(RE_CLOSE_GROUP.is_match("/closegroup dfgdfg"));
        assert!(RE_CLOSE_GROUP.is_match("\n\n/closegroup\n dfgdfg\n\n"));
    }

    #[test]
    fn test_help() {
        assert!(!RE_HELP.is_match("/admin lain@pleroma.soykaf.com"));
        assert!(RE_HELP.is_match("/help"));

        assert!(!RE_HELP.is_match("/helpx"));
        assert!(!RE_HELP.is_match("a/help"));
        assert!(!RE_HELP.is_match("help"));

        assert!(RE_HELP.is_match("x /help"));
        assert!(RE_HELP.is_match("/help dfgdfg"));
        assert!(RE_HELP.is_match("\n\n/help\n dfgdfg\n\n"));
    }

    #[test]
    fn test_members() {
        assert!(!RE_MEMBERS.is_match("/admin lain@pleroma.soykaf.com"));
        assert!(RE_MEMBERS.is_match("/members"));
        assert!(RE_MEMBERS.is_match("/who"));
        assert!(RE_MEMBERS.is_match("/admins"));
    }

    #[test]
    fn test_tags() {
        assert!(!RE_TAGS.is_match("/members"));
        assert!(RE_TAGS.is_match("/hashtags"));
        assert!(RE_TAGS.is_match("dsfsd /tags dfgd d"));
    }

    #[test]
    fn test_match_tag() {
        assert!(!RE_A_HASHTAG.is_match("banana sdfsdf sdfsd fdsf sd"));
        assert!(RE_A_HASHTAG.is_match("#banana"));
        assert!(RE_A_HASHTAG.is_match("#ласточка"));
        assert!(RE_A_HASHTAG.is_match("#χαλβάς"));
        assert!(RE_A_HASHTAG.is_match("#городДляЛюдей"));
        assert!(RE_A_HASHTAG.is_match("foo #banana gfdfgd"));
        assert!(RE_A_HASHTAG.is_match("foo #городДляЛюдей aaa"));
        assert!(!RE_A_HASHTAG.is_match("foo https://google.com/#banana gfdfgd"));
        assert!(!RE_A_HASHTAG.is_match("foo https://google.com/?foo#banana gfdfgd"));

        for (i, c) in RE_A_HASHTAG.captures_iter("foo #banana #χαλβάς #ласточка").enumerate() {
            if i == 0 {
                assert_eq!(c.get(1).unwrap().as_str(), "banana");
            } else if i == 1 {
                assert_eq!(c.get(1).unwrap().as_str(), "χαλβάς");
            } else if i == 2 {
                assert_eq!(c.get(1).unwrap().as_str(), "ласточка");
            }
        }
    }

    #[test]
    fn test_match_tag_at_end() {
        assert!(!RE_HASHTAG_TRIGGERING_PLEROMA_BUG.is_match("banana #tag sdfsd"));
        assert!(!RE_HASHTAG_TRIGGERING_PLEROMA_BUG.is_match("banana #tag ."));
        assert!(RE_HASHTAG_TRIGGERING_PLEROMA_BUG.is_match("banana #tag"));
        assert!(RE_HASHTAG_TRIGGERING_PLEROMA_BUG.is_match("banana #tag."));
        assert!(RE_HASHTAG_TRIGGERING_PLEROMA_BUG.is_match("banana #tag..."));
        assert!(RE_HASHTAG_TRIGGERING_PLEROMA_BUG.is_match("#tag..."));
    }

    #[test]
    fn test_match_tag_nobot() {
        assert!(!RE_NOBOT_TAG.is_match("banana #tag sdfsd"));
        assert!(!RE_NOBOT_TAG.is_match("banana #nobotanicals sdfsd"));
        assert!(RE_NOBOT_TAG.is_match("#nobot"));
        assert!(RE_NOBOT_TAG.is_match("aaa\n#nobot"));
        assert!(RE_NOBOT_TAG.is_match("aaa #nobot"));
        assert!(RE_NOBOT_TAG.is_match("#nobot xxx"));
        assert!(RE_NOBOT_TAG.is_match("#nobot\nxxx"));
    }

    #[test]
    fn test_leave() {
        assert!(!RE_LEAVE.is_match("/list"));
        assert!(RE_LEAVE.is_match("/leave"));
        assert!(RE_LEAVE.is_match("/leave"));
        assert!(RE_LEAVE.is_match("x /leave"));
        assert!(RE_LEAVE.is_match("/leave z"));
    }

    #[test]
    fn test_optout() {
        assert!(!RE_OPTOUT.is_match("/list"));
        assert!(!RE_OPTOUT.is_match("/optoutaaa"));
        assert!(RE_OPTOUT.is_match("/optout"));
        assert!(RE_OPTOUT.is_match("x /optout"));
        assert!(RE_OPTOUT.is_match("/optout z"));
    }

    #[test]
    fn test_optin() {
        assert!(!RE_OPTIN.is_match("/list"));
        assert!(!RE_OPTIN.is_match("/optinaaa"));
        assert!(RE_OPTIN.is_match("/optin"));
        assert!(RE_OPTIN.is_match("x /optin"));
        assert!(RE_OPTIN.is_match("/optin z"));
    }

    #[test]
    fn test_undo() {
        assert!(!RE_UNDO.is_match("/list"));
        assert!(RE_UNDO.is_match("/undo"));
        assert!(RE_UNDO.is_match("/delete"));
        assert!(RE_UNDO.is_match("/undo"));
        assert!(RE_UNDO.is_match("x /undo"));
        assert!(RE_UNDO.is_match("/undo z"));
    }

    #[test]
    fn test_join() {
        assert!(!RE_JOIN.is_match("/list"));
        assert!(RE_JOIN.is_match("/join"));
        assert!(RE_JOIN.is_match("/join"));
        assert!(RE_JOIN.is_match("x /join"));
        assert!(RE_JOIN.is_match("/join z"));
    }

    #[test]
    fn test_announce() {
        assert!(!RE_ANNOUNCE.is_match("/list"));
        assert!(RE_ANNOUNCE.is_match("sdfsdffsd /announce b"));
        assert!(RE_ANNOUNCE.is_match("/announce bla bla bla"));
        assert!(RE_ANNOUNCE.is_match("sdfsdffsd /announce bla bla bla"));
        assert_eq!(
            "bla bla bla",
            RE_ANNOUNCE
                .captures("sdfsdffsd /announce bla bla bla")
                .unwrap()
                .get(1)
                .unwrap()
                .as_str()
        );
    }

    #[test]
    fn test_real_post() {
        assert_eq!(
            Vec::<StatusCommand>::new(),
            parse_slash_commands("Hello there is nothing here /fake command")
        );
        assert_eq!(
            vec![StatusCommand::Help],
            parse_slash_commands("lets see some \\help and /ban @lain")
        );
        assert_eq!(
            vec![StatusCommand::Ignore],
            parse_slash_commands("lets see some /ignore and /ban @lain")
        );
        assert_eq!(
            vec![
                StatusCommand::BanUser("lain".to_string()),
                StatusCommand::BanUser("piggo@piggo.space".to_string()),
                StatusCommand::BanServer("soykaf.com".to_string()),
            ],
            parse_slash_commands("let's /ban @lain! /ban @piggo@piggo.space and also /ban soykaf.com")
        );
    }

    #[test]
    fn test_strip() {
        assert_eq!(
            vec![StatusCommand::BanUser("betty".to_string())],
            parse_slash_commands(
                r#"Let's bad the naughty bot: /ban <span class="h-card"><a class="u-url mention" data-user="9nXpaGZL88fPAiP8xU" href="https://piggo.space/users/betty" rel="ugc">@<span>betty</span></a></span>"#
            )
        );
        assert_eq!(
            vec![StatusCommand::BanUser("betty@abstarbauze.com".to_string())],
            parse_slash_commands(
                r#"Let's bad the naughty bot: /ban <span class="h-card"><a class="u-url mention" data-user="9nXpaGZL88fPAiP8xU" href="https://piggo.space/users/betty" rel="ugc">@<span>betty@abstarbauze.com</span></a></span>"#
            )
        );
    }
}