proc readlog {} {
	global defaultsection disable glversion lastread loglist max_log_change msgreplace msgtypes variables
	set lines ""

	foreach {logtype logid logpath} $loglist {
		if {![file readable $logpath]} {
			putlog "dZSbot error: Unable to read log file \"$logpath\"."
			continue
		}
		## The regex pattern to use for the logfile
		switch -exact -- $logtype {
			0 {set regex {^.+ \d+:\d+:\d+ \d{4} (\S+): (.+)}}
			1 - 2 {set regex {^.+ \d+:\d+:\d+ \d{4} \[(\d+)\s*\] (.+)}}
			default {putlog "dZSbot error: Internal error, unknown log type ($logtype)."; continue}
		}
		## Read the log data
		set logsize [file size $logpath]
		if {$lastread($logid) < $logsize && ($logsize - $lastread($logid) - $max_log_change) < 0} {
			if {![catch {set handle [open $logpath r]} error]} {
				seek $handle $lastread($logid)
				set data [read -nonewline $handle]
				set logsize [tell $handle]
				close $handle

				foreach line [split $data "\n"] {
					## Remove the date and time from the log line.
					if {[regexp $regex $line result event line]} {
						lappend lines $logtype $event $line
					} else {
						putlog "dZSbot warning: Invalid log line: $line"
					}
				}
			} else {
				putlog "dZSbot error: Unable to open log file \"$logpath\" ($error)."
			}
		}
		set lastread($logid) $logsize
	}

	foreach {type event line} $lines {
		## Login and sysop log specific parsing.
		if {$type == 1 && ![parselogin $line event line]} {
			putlog "dZSbot error: Unknown login.log line: $line"
			continue
		} elseif {$type == 2 && ![parsesysop $line event line]} {
			set event "SYSOP"
			set line [list $line]
		}
		ng_debug "Received event: $event (log: $type)."
                    
		## Check that the log line is a valid Tcl list.
		if {[catch {llength $line} error]} {
			putlog "dZSbot error: Invalid log line (not a tcl list): $line"
			continue
		}
		## Invite users to public and private channels.
		if {[string equal $event "INVITE"]} {
			foreach {nick user group flags} $line {break}
			ng_inviteuser $nick $user $group $flags
		}
		if {[lsearch -exact $msgtypes(SECTION) $event] != -1} {
			set path [lindex $line 0]
			if {[denycheck $path]} {continue}
			set section [getsectionname $path]

			# Replace messages with custom messages
			foreach {name value} [array get msgreplace] {
				set value [split $value ":"]
				if {[string equal $event [lindex $value 0]]} {
					if {[string match -nocase [lindex $value 1] $path]} {
						set event [lindex $value 2]
                                                
                                                
                                               
					}
				}
			}
		} elseif {[lsearch -exact $msgtypes(DEFAULT) $event] != -1} {
			set section $defaultsection
		} else {
			putlog "dZSbot error: Undefined message type \"$event\", check \"msgtypes(SECTION)\" and \"msgtypes(DEFAULT)\" in the config."
			continue
		}

	## If the event is disabled, skip the announce.
	if {([info exists disable($event)] && $disable($event) == 1)} {
		ng_debug "Announce skipped, \"$event\" is disabled."
		continue
	}

	## If a pre-event script returns false, skip the announce.
	if {[eventhandler precommand $event [list $section $line]]} {
		if {![info exists variables($event)]} {
			putlog "dZSbot error: \"variables($event)\" not defined in the config, type becomes \"$defaultsection\"."
			set event $defaultsection
		}

		if {![eventcheck $section $event]} {
			sndall $event $section [ng_format $event $section $line]
		}
	} else {
		ng_debug "Default announce skipped, \"$event\" pre-command script returned false."
	}

	if {![eventcheck $section $event]} {
		eventhandler postcommand $event [list $section $line]
	}
	if {$glversion == 1} {
		launchnuke
	}
	return
}