344 lines
11 KiB
D
344 lines
11 KiB
D
module singlog;
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version(Windows)
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import core.sys.windows.windows;
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else version(Posix)
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import core.sys.posix.syslog;
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import std.string;
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import std.stdio;
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import std.conv;
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import std.file;
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import std.datetime;
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import datefmt;
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alias log = Log.msg;
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/++
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Singleton for simple logging
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---
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// Setting the name of the logged program
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log.program("My program");
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// Setting the status of color text output
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log.color(true);
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// Setting the error output level
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log.level(log.DEBUGGING);
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log.level(log.ALERT);
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log.level(log.CRITICAL);
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log.level(log.ERROR);
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log.level(log.WARNING);
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log.level(log.NOTICE);
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log.level(log.INFORMATION);
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// Assigning a target output
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log.output(log.SYSLOG);
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log.output(log.STDOUT);
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log.output(log.FILE);
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// Setup and allowing writing to a file
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log.file("./file.log");
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// Output of messages to the log
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log.debugging("Debugging message");
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log.alert("Alert message");
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log.critical("Critical message");
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log.error("Error message");
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log.warning("Warning message");
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log.notice("Notice message");
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log.informations("Information message");
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---
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+/
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class Log {
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private:
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static Log _log;
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string _path;
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wstring _name = "singlog";
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bool _writeToFile = true;
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bool _ccolor = false;
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this() {}
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version(Windows) {
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int[] _sysPriority = [0, 1, 1, 1, 2, 3, 3];
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WORD[] _sysPriorityOS = [
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EVENTLOG_SUCCESS,
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EVENTLOG_ERROR_TYPE,
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EVENTLOG_WARNING_TYPE,
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EVENTLOG_INFORMATION_TYPE
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];
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void writesyslog(string message, WORD priority) {
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import std.utf: toUTF16z;
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auto wMessage = message.toUTF16z();
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HANDLE handleEventLog = RegisterEventSourceW(NULL, this._name.ptr);
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if (handleEventLog == NULL)
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return;
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ReportEventW(handleEventLog, priority, 0, 0, NULL, 1, 0, &wMessage, NULL);
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DeregisterEventSource(handleEventLog);
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}
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WORD[] _color = [
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FOREGROUND_GREEN, // green
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FOREGROUND_BLUE, // blue
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FOREGROUND_RED | FOREGROUND_BLUE, // magenta
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FOREGROUND_RED, // red
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FOREGROUND_RED | FOREGROUND_GREEN, // yellow
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FOREGROUND_BLUE | FOREGROUND_GREEN, // cyan
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FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN // white
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];
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void colorTextOutput(string time, wstring message, int priority) {
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HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
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CONSOLE_SCREEN_BUFFER_INFO defaultConsole;
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GetConsoleScreenBufferInfo(handle, &defaultConsole);
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writef("%s ", time);
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SetConsoleTextAttribute(handle, this._color[priority] | FOREGROUND_INTENSITY);
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write(this._type[priority]);
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SetConsoleTextAttribute(handle, this._color[priority]);
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WriteConsoleW(handle, message.ptr, cast(DWORD)message.length, NULL, NULL);
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SetConsoleTextAttribute(handle, defaultConsole.wAttributes);
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}
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void defaultTextOutput(string time, wstring message, int priority) {
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HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
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writef("%s %s", time, this._type[priority]);
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WriteConsoleW(handle, message.ptr, cast(DWORD)message.length, NULL, NULL);
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}
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void writestdout(string time, string message, int priority) {
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wstring wMessage = " %s\n".format(message).to!wstring;
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this._ccolor ?
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colorTextOutput(time, wMessage, priority) :
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defaultTextOutput(time, wMessage, priority);
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}
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// void writestderr(string time, string message, int priority) {
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// wstring wMessage = " %s\n".format(message).to!wstring;
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// this._ccolor ?
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// colorTextOutput(time, wMessage, priority) :
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// defaultTextOutput(time, wMessage, priority);
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// }
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} else version(Posix) {
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int[] _sysPriority = [0, 1, 2, 3, 4, 5, 6];
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int[] _sysPriorityOS = [
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LOG_DEBUG,
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LOG_ALERT,
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LOG_CRIT,
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LOG_ERR,
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LOG_WARNING,
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LOG_NOTICE,
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LOG_INFO
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];
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string[] _color = [
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"\x1b[1;32m%s\x1b[0;32m %s\x1b[0;0m", // green
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"\x1b[1;34m%s\x1b[0;34m %s\x1b[0;0m", // blue
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"\x1b[1;35m%s\x1b[0;35m %s\x1b[0;0m", // magenta
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"\x1b[1;31m%s\x1b[0;31m %s\x1b[0;0m", // red
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"\x1b[1;33m%s\x1b[0;33m %s\x1b[0;0m", // yellow
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"\x1b[1;36m%s\x1b[0;36m %s\x1b[0;0m", // cyan
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"\x1b[1;97m%s\x1b[0;97m %s\x1b[0;0m", // white
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];
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void writestdout(string time, string message, int priority) {
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writefln("%s %s",
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time,
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(this._ccolor ? this._color[priority] : "%s %s").format(this._type[priority], message)
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);
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}
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void writestderr(string time, string message, int priority) {
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// stderr.writefln("%s %s %s", time, this._type[priority], message);
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stderr.writefln("%s %s",
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time,
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(this._ccolor ? this._color[priority] : "%s %s").format(this._type[priority], message)
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);
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}
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void writesyslog(string message, int priority) {
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syslog(priority, message.toStringz());
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}
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}
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public enum {
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DEBUGGING = 0,
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ALERT = 1,
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CRITICAL = 2,
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ERROR = 3,
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WARNING = 4,
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NOTICE = 5,
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INFORMATION = 6
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}
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string[] _type = [
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"[DEBUG]:",
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"[ALERT]:",
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"[CRITICAL]:",
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"[ERROR]:",
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"[WARNING]:",
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"[NOTICE]:",
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"[INFO]:"
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];
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public enum {
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SYSLOG = 1,
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STDOUT = 2,
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STDERR = 4,
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FILE = 8
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}
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int _nowoutput = 0;
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int _output = STDOUT;
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int _priority = INFORMATION;
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void writelog(string message, int priority) {
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string time;
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int output = this._nowoutput ? this._nowoutput : this._output;
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this._nowoutput = 0;
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if (this._priority > priority)
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return;
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if (output & 1)
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writesyslog(message, _sysPriorityOS[_sysPriority[priority]]);
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if (output & 14)
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time = Clock.currTime().format("%Y.%m.%d %H:%M:%S");
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if (output & 2 && priority >= WARNING)
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writestdout(time, message, priority);
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if (output & 4 && priority <= ERROR)
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writestderr(time, message, priority);
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if (output & 8)
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writefile(time, message, priority);
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}
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void writefile(string time, string message, int priority) {
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if (!this._writeToFile)
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return;
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if (!this._path.exists) {
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this._writeToFile = false;
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this.warning("The log file does not exist: " ~ this._path);
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}
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File file;
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try {
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file = File(this._path, "a+");
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this._writeToFile = true;
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} catch (Exception e) {
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this._writeToFile = false;
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this.now(output.stderr).error("Unable to open the log file " ~ this._path);
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this.information(e);
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return;
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}
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try {
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file.writefln("%s %s %s", time, this._type[priority], message);
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} catch (Exception e) {
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this._writeToFile = false;
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this.now(output.stderr).error("Unable to write to the log file " ~ this._path);
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this.information(e);
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return;
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}
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try {
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file.close();
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} catch (Exception e) {
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this._writeToFile = false;
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this.now(output.stderr).error("Unable to close the log file " ~ this._path);
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this.information(e);
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return;
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}
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}
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struct Output {
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int _output = STDOUT;
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int _newoutput = 0;
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int output() { return this._newoutput ? this._newoutput : this._output; }
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public:
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Output syslog() { this._newoutput |= SYSLOG; return this; }
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Output stdout() { this._newoutput |= STDOUT; return this; }
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Output stderr() { this._newoutput |= STDERR; return this; }
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Output file() { this._newoutput |= FILE; return this; }
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}
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struct Level {
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public:
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int debugging() { return DEBUGGING; }
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int alert() { return ALERT; }
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int critical() { return CRITICAL; }
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int error() { return ERROR; }
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int warning() { return WARNING; }
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int notice() { return NOTICE; }
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int information() { return INFORMATION; }
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alias d = debugging;
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alias a = alert;
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alias c = critical;
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alias e = error;
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alias w = warning;
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alias n = notice;
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alias i = information;
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}
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struct Now {
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this(Output outs) {
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_log._nowoutput = outs.output();
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}
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public:
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void alert(T)(T message) { _log.alert(message); }
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void critical(T)(T message) { _log.critical(message); }
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void error(T)(T message) { _log.error(message); }
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void warning(T)(T message) { _log.warning(message); }
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void notice(T)(T message) { _log.notice(message); }
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void information(T)(T message) { _log.information(message); }
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void debugging(T)(T message) { _log.debugging(message); }
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alias a = alert;
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alias c = critical;
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alias e = error;
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alias w = warning;
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alias n = notice;
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alias i = information;
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alias d = debugging;
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}
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public:
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@property static Log msg() {
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if (this._log is null)
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this._log = new Log;
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return this._log;
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}
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Output output() { return Output(); }
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Level level() { return Level(); }
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Now now(Output outs) { return Now(outs); }
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Log output(Output outs) { this._output = outs.output(); return this._log; }
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deprecated Log output(int outs) { this._output = outs; return this._log; }
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Log program(string name) { this._name = name.to!wstring; return this._log; }
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Log file(string path) { this._path = path; return this._log; }
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Log level(int priority) { this._priority = priority; return this._log; }
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Log color(bool condition) { this._ccolor = condition; return this._log; }
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void alert(T)(T message) { writelog(message.to!string, ALERT); }
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void critical(T)(T message) { writelog(message.to!string, CRITICAL); }
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void error(T)(T message) { writelog(message.to!string, ERROR); }
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void warning(T)(T message) { writelog(message.to!string, WARNING); }
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void notice(T)(T message) { writelog(message.to!string, NOTICE); }
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void information(T)(T message) { writelog(message.to!string, INFORMATION); }
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void debugging(T)(T message) { writelog(message.to!string, DEBUGGING); }
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alias a = alert;
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alias c = critical;
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alias e = error;
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alias w = warning;
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alias n = notice;
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alias i = information;
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alias d = debugging;
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}
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