module log import ( os time term ) pub enum LogLevel { fatal = 1 error warn info debug } fn tag(l LogLevel) string { return match l { .fatal { term.red('FATAL') } .error { term.red('ERROR') } .warn { term.yellow('WARN ') } .info { term.white('INFO ') } .debug { term.blue('DEBUG') } else { ' ' } } } pub const ( FATAL = 1 ERROR = 2 WARN = 3 INFO = 4 DEBUG = 5 ) interface Logger { fatal(s string) error(s string) warn(s string) info(s string) debug(s string) } pub struct Log { mut: level LogLevel output_label string ofile os.File output_to_file bool pub mut: output_file_name string } pub fn (l mut Log) set_level(level int) { l.level = match level { FATAL { LogLevel.fatal } ERROR { LogLevel.error } WARN { LogLevel.warn } INFO { LogLevel.info } DEBUG { LogLevel.debug } else { .debug } } } pub fn (l mut Log) set_output_level(level LogLevel) { l.level = level } pub fn (l mut Log) set_full_logpath(full_log_path string) { rlog_file := os.realpath( full_log_path ) l.set_output_label( os.filename( rlog_file ) ) l.set_output_path( os.base_dir( rlog_file ) ) } pub fn (l mut Log) set_output_label(label string){ l.output_label = label } pub fn (l mut Log) set_output_path(output_file_path string) { if l.ofile.is_opened() { l.ofile.close() } l.output_to_file = true l.output_file_name = os.join( os.realpath( output_file_path ) , l.output_label ) ofile := os.open_append( l.output_file_name ) or { panic('error while opening log file ${l.output_file_name} for appending') } l.ofile = ofile } pub fn (l mut Log) close() { l.ofile.close() } fn (l mut Log) log_file(s string, level LogLevel) { timestamp := time.now().format_ss() e := tag(level) l.ofile.writeln('$timestamp [$e] $s') } fn (l &Log) log_cli(s string, level LogLevel) { f := tag(level) t := time.now() println('[$f ${t.format_ss()}] $s') } fn (l mut Log) send_output(s &string, level LogLevel) { if l.output_to_file { l.log_file(s, level) } else { l.log_cli(s, level) } } pub fn (l mut Log) fatal(s string){ if l.level < .fatal { return } l.send_output(s, .fatal) l.ofile.close() panic('$l.output_label: $s') } pub fn (l mut Log) error(s string) { if l.level < .error { return } l.send_output(s, .error) } pub fn (l mut Log) warn(s string) { if l.level < .warn { return } l.send_output(s, .warn) } pub fn (l mut Log) info(s string) { if l.level < .info { return } l.send_output(s, .info) } pub fn (l mut Log) debug(s string) { if l.level < .debug { return } l.send_output(s, .debug) }