commit 9499a4fe3604cddacf333786e7a8bb6017cc364f
Author: JustAnyone <dom.svetikas@gmail.com>
Date:   Sat Apr 18 01:39:43 2026 +0300

    Initial commit

diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..7c88878
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,9 @@
+module fix-mime-types
+
+go 1.22.3
+
+require (
+	github.com/gabriel-vasile/mimetype v1.4.4
+	github.com/pelletier/go-toml/v2 v2.2.3
+	golang.org/x/net v0.25.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..4ee8384
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,6 @@
+github.com/gabriel-vasile/mimetype v1.4.4 h1:QjV6pZ7/XZ7ryI2KuyeEDE8wnh7fHP9YnQy+R0LnH8I=
+github.com/gabriel-vasile/mimetype v1.4.4/go.mod h1:JwLei5XPtWdGiMFB5Pjle1oEeoSeEuJfJE+TtfvdB/s=
+github.com/pelletier/go-toml/v2 v2.2.3 h1:YmeHyLY8mFWbdkNWwpr+qIL2bEqT0o95WSdkNHvL12M=
+github.com/pelletier/go-toml/v2 v2.2.3/go.mod h1:MfCQTFTvCcUyyvvwm1+G6H/jORL20Xlb6rzQu9GuUkc=
+golang.org/x/net v0.25.0 h1:d/OCCoBEUq33pjydKrGQhw7IlUPI2Oylr+8qLx49kac=
+golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..7bd0b73
--- /dev/null
+++ b/main.go
@@ -0,0 +1,126 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"io/fs"
+	"log"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/gabriel-vasile/mimetype"
+	"github.com/pelletier/go-toml/v2"
+)
+
+type Config struct {
+	Paths []string
+}
+
+func loadConfiguration() (*Config, error) {
+	dir, err := os.UserConfigDir()
+	if err != nil {
+		return nil, err
+	}
+
+	configFilePath := path.Join(dir, "justanyone", "fix-mime-types", "config.toml")
+	_, err = os.Stat(configFilePath)
+	if err != nil {
+		// If it's an error that is not for file not existing, send it upwards
+		if !errors.Is(err, os.ErrNotExist) {
+			return nil, err
+		}
+
+		// Otherwise, create the parent directories
+		if err := os.MkdirAll(filepath.Dir(configFilePath), 0770); err != nil {
+			return nil, err
+		}
+
+		// Marshal a default object
+		bytes, _ := toml.Marshal(&Config{Paths: []string{}})
+
+		file, err := os.Create(configFilePath)
+		if err != nil {
+			return nil, err
+		}
+		defer file.Close()
+		file.Write(bytes)
+	}
+
+	file, err := os.Open(configFilePath)
+	if err != nil {
+		return nil, err
+	}
+
+	bytes, err := io.ReadAll(file)
+	if err != nil {
+		return nil, err
+	}
+
+	var config Config
+	err = toml.Unmarshal(bytes, &config)
+	if err != nil {
+		return nil, err
+	}
+	return &config, nil
+}
+
+func main() {
+	config, err := loadConfiguration()
+	if err != nil {
+		log.Fatal("Failed to load configuration:", err)
+	}
+
+	if len(config.Paths) == 0 {
+		fmt.Println("Warning: you have no configured directory paths")
+	}
+
+	for _, directory := range config.Paths {
+		fixExtensionsInDirectory(directory)
+	}
+}
+
+func shouldEntryBeChecked(entry fs.DirEntry) bool {
+	//fmt.Println(filepath.Ext(entry.Name()))
+	// If it's a file
+	return (entry.Type().IsRegular() &&
+		// If it ends with .jpeg or .jpg
+		(strings.HasSuffix(entry.Name(), ".jpeg") ||
+			strings.HasSuffix(entry.Name(), ".jpg")))
+}
+
+func getFileMimeType(pathToFile string) *mimetype.MIME {
+	mimeType, err := mimetype.DetectFile(pathToFile)
+	if err != nil {
+		panic(err)
+	}
+	return mimeType
+}
+
+func changeFileExtension(originalPath string, newExtension string) {
+	oldExt := filepath.Ext(originalPath)
+	newPath := originalPath[0:len(originalPath)-len(oldExt)] + newExtension
+	os.Rename(originalPath, newPath)
+}
+
+func fixExtensionsInDirectory(directory string) {
+	entries, err := os.ReadDir(directory)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	for _, v := range entries {
+		if shouldEntryBeChecked(v) {
+			path := filepath.Join(directory, v.Name())
+			if getFileMimeType(path).String() == "image/png" {
+				fmt.Println("File at", path, "was detected as png with wrong extension")
+				changeFileExtension(path, ".png")
+			}
+		} else if v.IsDir() {
+			fixExtensionsInDirectory(path.Join(directory, v.Name()))
+		}
+	}
+}