From 914781cd004eac4b774d27acc5631bb3fa9752fa Mon Sep 17 00:00:00 2001
From: Melora Hugues <dev@faercol.me>
Date: Sun, 13 Aug 2023 16:20:55 +0200
Subject: [PATCH] Add base structure and logger

---
 config/.gitignore       |  1 +
 config/Makefile         |  5 +++
 config/go.mod           |  3 ++
 config/logger/logger.go | 86 +++++++++++++++++++++++++++++++++++++++++
 config/main.go          | 14 +++++++
 5 files changed, 109 insertions(+)
 create mode 100644 config/.gitignore
 create mode 100644 config/Makefile
 create mode 100644 config/go.mod
 create mode 100644 config/logger/logger.go
 create mode 100644 config/main.go

diff --git a/config/.gitignore b/config/.gitignore
new file mode 100644
index 0000000..c795b05
--- /dev/null
+++ b/config/.gitignore
@@ -0,0 +1 @@
+build
\ No newline at end of file
diff --git a/config/Makefile b/config/Makefile
new file mode 100644
index 0000000..58373ce
--- /dev/null
+++ b/config/Makefile
@@ -0,0 +1,5 @@
+.PHONY: build
+
+build:
+	mkdir -p build/
+	go build -o build/
diff --git a/config/go.mod b/config/go.mod
new file mode 100644
index 0000000..598eec5
--- /dev/null
+++ b/config/go.mod
@@ -0,0 +1,3 @@
+module git.faercol.me/faercol/http-boot-config/config
+
+go 1.20
diff --git a/config/logger/logger.go b/config/logger/logger.go
new file mode 100644
index 0000000..8b0c335
--- /dev/null
+++ b/config/logger/logger.go
@@ -0,0 +1,86 @@
+package logger
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+const (
+	NC     = "\033[0m"
+	red    = "\033[0;31m"
+	yellow = "\033[0;33m"
+)
+
+const (
+	errorPrefix   = "Error: "
+	fatalPrefix   = "Fatal: "
+	warningprefix = "Warning: "
+)
+
+type SimpleLogger struct {
+	enableColour bool
+}
+
+func (sl *SimpleLogger) printMsg(msg string, dest io.Writer) {
+	if msg[len(msg)-1:] != "\n" {
+		msg = msg + "\n"
+	}
+
+	n, err := fmt.Fprint(dest, msg)
+	if err != nil {
+		panic(fmt.Errorf("failed to write message to %v: %w", dest, err))
+	}
+	if n != len(msg) {
+		panic(fmt.Errorf("failed to write the entire message (%d/%d)", n, len(msg)))
+	}
+}
+
+func (sl *SimpleLogger) colourText(msg string, colour string) string {
+	if !sl.enableColour {
+		return msg
+	}
+	return colour + msg + NC
+}
+
+func (sl *SimpleLogger) Info(msg string) {
+	sl.printMsg(msg, os.Stdout)
+}
+
+func (sl *SimpleLogger) Infof(format string, a ...any) {
+	sl.printMsg(fmt.Sprintf(format, a...), os.Stdout)
+}
+
+func (sl *SimpleLogger) Error(msg string) {
+	sl.printMsg(sl.colourText(errorPrefix+msg, red), os.Stderr)
+}
+
+func (sl *SimpleLogger) Errorf(format string, a ...any) {
+	sl.printMsg(sl.colourText(errorPrefix+fmt.Sprintf(format, a...), red), os.Stderr)
+}
+
+func (sl *SimpleLogger) Warning(msg string) {
+	sl.printMsg(sl.colourText(warningprefix+msg, yellow), os.Stdout)
+}
+
+func (sl *SimpleLogger) Warningf(format string, a ...any) {
+	sl.printMsg(sl.colourText(warningprefix+fmt.Sprintf(format, a...), yellow), os.Stdout)
+}
+
+func (sl *SimpleLogger) Fatal(msg string) {
+	sl.printMsg(sl.colourText(fatalPrefix+msg, red), os.Stderr)
+	os.Exit(1)
+}
+
+func (sl *SimpleLogger) Fatalf(format string, a ...any) {
+	sl.printMsg(sl.colourText(fatalPrefix+fmt.Sprintf(format, a...), red), os.Stderr)
+	os.Exit(1)
+}
+
+func WithColour() *SimpleLogger {
+	return &SimpleLogger{enableColour: true}
+}
+
+func NoColour() *SimpleLogger {
+	return &SimpleLogger{enableColour: false}
+}
diff --git a/config/main.go b/config/main.go
new file mode 100644
index 0000000..8ab1cf9
--- /dev/null
+++ b/config/main.go
@@ -0,0 +1,14 @@
+package main
+
+import "git.faercol.me/faercol/http-boot-config/config/logger"
+
+func main() {
+	l := logger.NoColour()
+
+	l.Info("test message")
+	l.Warning("this is a warning")
+	l.Error("this is an error")
+
+	l.Fatal("this is fatal")
+	l.Info("This should not be displayed")
+}