--[[

        cmd_unban.lua v0.03 by blastbeat

        - this script adds a command "unban" to unban users by ip/nick/cid
        - usage: [+!#]unban ip|nick|cid <ip>|<nick>|<cid>
        
        - IMPORTANT: cmd_unban.lua depends on following scripts:
          - cmd_ban.lua v0.03+ for banfile
          - bot_opchat.lua v0.03+ in case of enabled opchat feed

        - changelog 0.03:
          - updated script api

        - changelog 0.02:
          - added level checking

]]--

--// settings begin //--

local permission = {

    --// [ user_level = level means user_level can unban users banned by level //--

    [ 60 ] = 60,    -- operator can unban users banned by operators
    [ 80 ] = 80,    -- admin
    [ 100 ] = 100,    -- hubowner

}

local opchat_feed = true    --// send status message to opchat?

local msg_denied = "You are not allowed to use this command."
local msg_import = "Error while importing bot_opchat.lua/cmd_ban.lua"
local msg_usage = "Usage: [+!#]unban ip|nick|cid <ip>|<nick>|<cid>"
local msg_off = "User not found."
local msg_god = "You are not allowed to unban this user."
local msg_ok = "%s removed ban of %s"

local cmd = "unban"

--// settings end //--

local utf_match = utf.match

local opchat
local bans
local path

hub:setListener( "onStart", { },
    function( )
        opchat = hub.import "bot_opchat"
        local ban = hub.import "cmd_ban"
        if ( not opchat and opchat_feed ) or not ban then
            error( msg_import )
        end
        bans = ban.bans
        local help = hub.import "cmd_help"
        if help then
            help.reg( "unban", "[+!#]unban ip|nick|cid <ip>|<nick>|<cid>", "unbans user by ip or nick or cid", 60 )
        end
        return nil
    end
)

hub:setListener( "onBroadcast", { },
    function( user, adccmd, txt )
        local command, parameters = utf_match( txt, "^[+!#](%a+) ?(.*)" )
        if command == cmd then
            local user_level = user:getLevel( )
            if not permission[ user_level ] then
                user:reply( msg_denied, hub.getbot( ) )
                return PROCESSED
            end
            local by, id = utf.match( parameters, "^(%S+) (%S+)" )
            if not ( (by == "sid" or by == "nick" or by == "cid" ) and id ) then
                user:reply( msg_usage, hub.getbot( ) )
                return PROCESSED
            end
            for i, ban_tbl in ipairs( bans ) do
                if ban_tbl[ by ] == id then
                    if permission[ user_level ] < ( ban_tbl.by_level or 100 ) then
                        user:reply( msg_god, hub.getbot( ) )
                        return PROCESSED
                    end
                    table.remove( bans, i )
                    util.saveArray( bans, path )
                    local user_nick = hub.escapefrom( user:getNick( ) )
                    local status_message = utf.format( msg_ok, user_nick, id )
                    local _ = opchat_feed and opchat.feed( status_message )
                    user:reply( status_message, hub.getbot( ) )
                    return PROCESSED
                end
            end
            user:reply( msg_off, hub.getbot( ) )
            return PROCESSED
        end
        return nil
    end
)

hub.debug( "** Loaded cmd_unban.lua **" )