// Copyright (c) 2012-2014 Jeremy Latt
// Copyright (c) 2014-2015 Edmund Huber
// Copyright (c) 2016 Daniel Oaks <daniel@danieloaks.net>
// released under the MIT license

package irc

import (
	"strings"
)

// ModeSet holds a set of modes.
type ModeSet map[Mode]bool

// String returns the modes in this set.
func (set ModeSet) String() string {
	if len(set) == 0 {
		return ""
	}
	strs := make([]string, len(set))
	index := 0
	for mode := range set {
		strs[index] = mode.String()
		index++
	}
	return strings.Join(strs, "")
}

// ClientSet is a set of clients.
type ClientSet map[*Client]bool

// Add adds the given client to this set.
func (clients ClientSet) Add(client *Client) {
	clients[client] = true
}

// Remove removes the given client from this set.
func (clients ClientSet) Remove(client *Client) {
	delete(clients, client)
}

// Has returns true if the given client is in this set.
func (clients ClientSet) Has(client *Client) bool {
	return clients[client]
}

// MemberSet is a set of members with modes.
type MemberSet map[*Client]ModeSet

// Add adds the given client to this set.
func (members MemberSet) Add(member *Client) {
	members[member] = make(ModeSet)
}

// Remove removes the given client from this set.
func (members MemberSet) Remove(member *Client) {
	delete(members, member)
}

// Has returns true if the given client is in this set.
func (members MemberSet) Has(member *Client) bool {
	_, ok := members[member]
	return ok
}

// HasMode returns true if the given client is in this set with the given mode.
func (members MemberSet) HasMode(member *Client, mode Mode) bool {
	modes, ok := members[member]
	if !ok {
		return false
	}
	return modes[mode]
}

// AnyHasMode returns true if any of our clients has the given mode.
func (members MemberSet) AnyHasMode(mode Mode) bool {
	for _, modes := range members {
		if modes[mode] {
			return true
		}
	}
	return false
}

// ChannelSet is a set of channels.
type ChannelSet map[*Channel]bool