Changed file structure to align with the recommendations given by https://github.com/golang-standards/project-layout

api/Admin.go

@@ -0,0 +1 @@
+package api

api/FileHandlers.go

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+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"os"
+	"path/filepath"
+)
+
+type FileData struct {
+	ImageNames      []string
+	SpicyImageNames []string
+	AsciiFiles      []AsciiEntry
+}
+
+type AsciiEntry struct {
+	Name     string
+	FontSize int
+}
+
+const staticDir = "static"
+
+// move FileData and AsciiEntry here if you want, or leave in main.go
+func FileHandler(w http.ResponseWriter, r *http.Request) {
+	data := FileData{
+		ImageNames:      []string{},
+		SpicyImageNames: []string{},
+		AsciiFiles:      []AsciiEntry{},
+	}
+
+	files, _ := os.ReadDir(filepath.Join(staticDir, "images"))
+	for _, file := range files {
+		fileName := file.Name()
+		data.ImageNames = append(data.ImageNames, filepath.Join(staticDir, "images", fileName))
+	}
+	files, _ = os.ReadDir(filepath.Join("uploads"))
+	for _, file := range files {
+		fileName := file.Name()
+		data.ImageNames = append(data.ImageNames, filepath.Join("uploads", fileName))
+	}
+
+	files, _ = os.ReadDir(filepath.Join(staticDir, "spicy"))
+	for _, file := range files {
+		fileName := file.Name()
+		data.SpicyImageNames = append(data.SpicyImageNames, filepath.Join(staticDir, "spicy", fileName))
+	}
+
+	files, _ = os.ReadDir(filepath.Join(staticDir, "ascii_art"))
+	for _, file := range files {
+		fileName := file.Name()
+		data.AsciiFiles = append(data.AsciiFiles,
+			AsciiEntry{Name: filepath.Join(staticDir, "ascii_art", fileName), FontSize: 12},
+		)
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(data)
+}

api/UploadHandlers.go

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+package api
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+)
+
+func UploadHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	file, header, err := r.FormFile("image") // "image" is the name of the file input
+	if err != nil {
+		http.Error(w, "Error retrieving file", http.StatusBadRequest)
+		return
+	}
+	defer file.Close()
+
+	dst, err := os.Create("./uploads/" + header.Filename)
+	if err != nil {
+		http.Error(w, "Error creating file on server", http.StatusInternalServerError)
+		return
+	}
+	defer dst.Close()
+
+	if _, err := io.Copy(dst, file); err != nil {
+		http.Error(w, "Error saving file", http.StatusInternalServerError)
+		return
+	}
+	fmt.Fprint(w, "<script>location.href = '/admin/'</script>")
+	fmt.Fprintf(w, "Image uploaded successfully: %s", header.Filename)
+}